RCABC Roofing Practices Manual - User contributions [en]

(Draft) Notes to GLW Standard

2026-06-19T22:24:57Z

James Klassen: /* Notes to Part 10 */

(Draft) Notes to GLW Standard

2026-06-19T22:17:31Z

James Klassen: /* Notes to Part 9 */

(Draft) Notes to GLW Standard

2026-06-19T22:14:13Z

James Klassen: /* A-9.1.3.3. System Securement */

(Draft) RGC Standard for Grade-level Waterproofing Systems

2026-06-19T22:13:51Z

James Klassen: /* 9.1.3.5. Securement */

__NONUMBEREDHEADINGS__
<div class="row">

{{DISPLAYTITLE:{{FULLPAGENAME}}}}
<div class="row">

<div class="col-md-3" style="float:right;" id="tocDiv">
<div class="noautonum">__TOC__</div>
</div> 

<div class="col-md-9" id="mainBodyDiv">

<big><big>Division B - Standards</big></big> 
<big>Other Waterproofing Systems</big> 

<hr>
<big><big><big><big><big><big>RGC Standard for Grade-level Waterproofing Systems</big></big></big></big></big></big>
<div class="panel panel-primary">
<div class="panel-heading"><big>'''About the Standard'''</big></div>
<div class="panel-body">
This Standard is a consolidation of requirements previously published in the Roofing Practices Manual for all waterproofing systems applied to structural decks at or touching grade. It is comprised of fourteen (14) Parts that contain the requirements, guiding principles, recommendations, and informative materials necessary for a roof to qualify for a '''''RoofStar 5-Year Guarantee''''' or '''''RoofStar 10-Year Guarantee'''''.

Notes to the Standard are hyperlinked from each Part and can be read by using the link in the Table of Contents for the Standard. Highlighted text within the body of the Standard indicates revisions made within the last twelve (12) months.

This Standard follows a specific structure, incorporates defined terms, and utilizes coloured text to denote specific meaning; this is explained in [[Structure_and_Organization_of_RPM_and_Standards | Division A, Part 2, "Structure and Organization of RPM and Standards"]]. When the requirements in this Standard conflict with other resources found either in this Manual or in ''manufacturer's'' published instructions, the rules for Authority and Conflict in [[Structure_and_Organization_of_RPM_and_Standards#2.3.1.2._Authority_and_Conflict | Division A, Article 2.3.1.2.]] shall be applied.

Readers are advised to review relevant materials that can be accessed through the hyperlinks embedded in the body of text.

<div class="col-md-12">
</div>
<hr>
<div class="col-md-4">
</div>
<div class="col-md-4">

:::{|
|-
! <div style="text-align:center;"><big><big>Table of Contents</big></big></div>
|-
| [[#PART_1 | Part 1 - General]]
|-
| [[#PART_2 | Part 2 - Supporting Structures: Decks and Walls]]
|-
| [[#PART_3 | Part 3 - Securing the Waterproofing Assembly]]
|-
| [[#PART_4 | Part 4 - Materials]]
|-
| [[#PART_5 | Part 5 - Deck and Wall Overlays]]
|-
| [[#PART_6 | Part 6 - Air and Vapour Controls]]
|-
| [[#PART_7 | Part 7 - Insulation]]
|-
| [[#PART_8 | Part 8 - Reserved]]
|-
| [[#PART_9 | Part 9 - Membrane System Field]]
|-
| [[#PART_10 | Part 10 - Perimeters and Walls]]
|-
| [[#PART_11 | Part 11 - Drainage]]
|-
| [[#PART_12 | Part 12 - Penetrations and Curbs]]
|-
| [[#PART_13 | Part 13 - Linear Metal Flashing]]
|-
| [[#PART_14 | Part 14 - Planters and Other Structures]]
|-
| <hr>
|-
| [[Notes to GLW Standard | Notes to Standard]]
|-
|}

</div>
<div class="col-md-12">
<hr>
<div style="text-align:center">
'''First Edition''': January 1, 2010
 '''Previous Edition''': April 5, 2024
 '''Current Edition''': Adopted June 11, 2026
 
All changes to this Standard are effective <big>'''July 1, 2026'''</big>
</div>
<div style="text-align:center">
{{Template:RPM Page Footer with Copyright and Current Date}}
</div>
</div>
</div>
</div>
<div id=PREFACE></div>
=Preface=
In 2010, the RCABC Guarantee Corp. (RGC) launched the RoofStar Guarantee for Waterproofing Systems and its supporting Standard, “Waterproofing Systems – Plazas, Promenades and Terraces”. Today, we call it the RGC Standard for Grade-level Waterproofing Systems. This Standard was substantially revised and adopted June 11, 2026 to align its structure and much of its content with the roofing Standards published in the RCABC Roofing Practices Manual. Although much of the content in this Standard applies to all waterproofing systems, regardless of membrane type, the reader will occasionally find links to membrane-specific content published in the related ''waterproofing roof'' Standards.

Waterproofing is a broad term that means sealing a surface or assembly so that water cannot pass into or through it. Unlike systems that shed water (for example, a metal or asphalt shingle roofs), waterproofing does not depend on gravity. Instead, it is accomplished with materials and methods that resist the transmission of water, even water that accumulates depth and is left standing on the waterproofed surface. However, there are some differences between waterproofing a roof and waterproofing on structural ''decks'' at grade.

Often, structural ''decks'' constructed at grade are not built with slope to drains, and because waterproofing assemblies are not insulated below the membrane, they do not utilize sloped insulation to move water to drains and a drainage system. Hydrostatic pressure is therefore more of a concern than it might be on many roofs (water exerts a pressure of 1000 Kg/m2 per metre of depth, or 62.2 lbs/ft2 per foot of depth). For that reason, only fully adhered membranes are permitted on these assemblies, the membranes are generally thicker than those that can be installed on a roof, the assemblies may be only uninsulated or “protected” (insulated above the membrane), and membrane reinforcement may be restricted to maximize flexibility while minimizing puncture resistance.

Structural concrete slabs at grade are also used differently from roofs. Often, these surfaces are leveraged by the general contractor and other trades for loading and staging materials, running equipment, and processing or fabricating building components. Because these platforms are suspended over occupied space or parking garages, the membranes installed on these ''decks'' must be tough, reliable, and protected, able to withstand abuse and damage. The methods used to install and seal them also must be rigorous. Membranes used in this kind of waterproofing must also be tested for watertightness and, when they are covered by permanent wearing courses, which can be expensive to remove if a leak occurs (for example, patios and gardens around the front entrance of a condominium tower), they must be guarded by an electronic leak detection (ELD) system. In some instances, the use of ELD is a requirement of this Guarantee.

Waterproofing is accomplished with single or multi-ply membrane systems RGC in membranes that are manufactured in various forms – as sheet goods (often packaged and delivered to site in rolls), or as liquid-applied systems, reinforced with a fabric (often polyester).

This Standard is limited to assemblies that are generally for pedestrian access, with limited access by emergency vehicles. It is also limited to structural slabs that touch grade; fully elevated podium ''decks'' are governed by the RGC waterproofing roof Standards. For that reason, a '''''RoofStar Guarantee for Grade-level Waterproofing''''' is not available for parking surfaces, driveways, or foundation walls below grade.

Within the scope of this Standard, much is possible and permissible. However, not everything permissible is necessarily advisable; good judgement must be exercised at the design stage to ensure a ''project’s'' success, and good judgement reaches well beyond what this Standard can address.

As a fully integrated document, every Part of this Standard contains critical requirements that sometimes overlap requirements in other Parts. While numerous requirements are linked internally to related Articles throughout the Standard, not every relationship between requirements is made in this fashion. Therefore, the reader must become familiar with the Standard in its entirety.

- RCABC Technical Services

<div id=PART_1></div>
=Part 1 - General=
==Section 1.1. Design==
===1.1.1. General===
====1.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
<li>In addition to the Scope described in Division A, this Standard applies to the design and construction of new or replacement waterproofing assemblies strictly intended for pedestrian traffic and limited emergency vehicle access strictly (See [[#1.1.1.2. Coverage and Limitations | Article 1.1.1.2.]] for limitations of coverage).
</li></ol>

====1.1.1.2. Coverage and Limitations====

<ol>
<li>Coverage under the '''''RoofStar™ Guarantee''''' shall be as described in Division A, [[Guarantee#3.2.1.1._Guarantee_Terms_and_Coverage | Article 3.2.1.1.]] and [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Article 3.2.1.2.]]
<li>A '''''RoofStar Guarantee''''' for ''waterproofing assemblies'' covers only ''waterproofing systems'' installed on structural ''decks'' that touch grade (the ground), that are strictly intended for pedestrian traffic (plazas, promenades, and terraces) and limited emergency vehicle access; ''waterproofing systems'' applied to or installed on vehicle parking ''decks'' and driveways, below-grade walls, foundations and footings, and repairs or renovations to in-service ''waterproofing systems'', do not qualify for a '''''RoofStar Guarantee''''' for ''waterproofing assemblies''.
</li></ol>

====1.1.1.3. References====

<ol>
<li>In this Standard, all references to
<ol>
<li>the "British Columbia Building Code" (the "Building Code", or the "Code"), to municipal or regional building codes or regulations, or to other standards, presume the current edition that is in force,
<li>materials mean those materials expressly accepted by the '''''Guarantor''''', unless stated otherwise, and
<li>measurements are shown in metric units first, followed by Imperial values (typically in parentheses; see [[Structure_and_Organization_of_RPM_and_Standards#2.1.3.2._Measurements | Division A, Article 2.1.3.2., "Measurements"]]).
</li></ol>
</li></ol>

====1.1.1.4. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part and the Standard:
<ol>
<li>''Design Authority'' means the individual or firm responsible for the issuance of ''project'' specifications and details to which the ''project'' will be bid and constructed. When a ''Contractor'' designs a ''project'', the ''Contractor'' is deemed to be the ''Design Authority''.
<li>''Finished system surface'' means the top surface of any waterproofing or water-shedding system, inclusive of ballast or ''overburden''.
<li>''Grade-level waterproofing system'' means an insulated or uninsulated ''system'', designed and constructed at grade with a sheet or liquid-applied membrane, to exclude water.
<li>''Guarantor'' (used interchangeably with '''''RGC''''') means the '''RCABC Guarantee Corporation''', which offers the '''''RoofStar Guarantee'''''.
<li> ''Linear metal flashing'' means flashings cut and shaped from flat metal stock, to redirect water at roof perimeters and edges, or to control the flow of water in valleys and drainage spillways. ''Linear metal flashings'' also protect roof membranes from weathering and damage and provide an aesthetic finish to the ''waterproofing system'' or ''water-shedding system''.
<li>''Membrane system'' means the combination of field and flashing membranes which function together to waterproof underlying materials and ''systems''.
<li>''Observer'' means a firm or person paid by the building Owner (directly, or through the '''''RGC'''''), who is independent (not a member) of the RCABC, and who is accepted by the '''''RGC''''' to provide Quality Assurance reviews during construction and after completion of the ''project'', according to the terms and conditions set out in RCABC policy.
<li>''Qualified roof condition surveyor'' means a person trained and competent in the use and interpretation of infrared thermographic and electronic moisture scanning equipment, used in the condition assessment of a ''waterproofing system'' or ''water-shedding system''.
<li>''Waterproofing system'' means a sealed, functional arrangement of ''primary materials'' constructed on roofs, plaza ''decks'', or on grade-level slabs (with or without insulation and other related materials), to resist the transmission of liquid water through the system, including water under hydrostatic pressure.
</li></ol>
</li></ol>

====1.1.1.5. Undefined Terms====

<ol>
<li>The following undefined terms are used throughout this Standard and are not formatted differently from the body of text:
<ol>
<li>Grade-level slab is a term that commonly refers to a structural deck conforming to the requirements in [[#2.1.5. Roof Decks | Subsection 2.1.5.]], that directly touches ground (grade) and covers spaces below.
<li>Podium deck is a term that commonly refers to a structural ''deck'' that aligns with [[#2.1.5. Roof Decks | Subsection 2.1.5.]], that touches grade, covers spaces below, supports structures and occupied spaces above it, and is generally limited to pedestrian access and occasional emergency vehicles or seasonal maintenance equipment.
<li>Wearing course is a term that commonly means a hard surface that is installed above the ''waterproofing system'' to resist abrasion and compaction from pedestrian and occasional vehicular traffic; it can be a removable material (“accessible” wearing course, such as pavers), or permanent (“inaccessible”, e.g., a concrete slab poured on top of the ''waterproofing system''.
</ol></li>
</ol></li>

====1.1.1.6. Objectives====

<ol>
<li>Every ''waterproofing system'' shall conform to the more stringent of this Standard or the Building Code or By-law having jurisdiction.
</li></ol>

====1.1.1.7. Responsibility for Design====

<ol>
<li>Each design of a ''waterproofing assembly'' shall be undertaken by a person or persons qualified in the work concerned (See [[#3.1.3.1. Responsibility for Design | Article 3.1.3.1.]] with respect to the securement of the ''roof assembly'').
<li>The ''Coordinating Registered Professional'' is responsible for ensuring the design of the ''vegetated roof assembly'' complies with all applicable building, energy, and fire codes having jurisdiction.
</li></ol>

====1.1.1.8. Pre-Design Requirements====
<ol>
<li>The ''Coordinating Registered Professional'' is responsible to ensure that the design of a ''waterproofing assembly'' is a multi-disciplinary enterprise that aligns with the designs for structural, plumbing, mechanical, electrical, architectural, and building envelope, together with all trades whose work intersects with the ''Contractor’s'' scope of work, to minimize out-of-sequence operations that could compromise the integrity of the completed ''waterproofing assembly''.
</li></ol>

====1.1.1.9. Suitability of Design====
<ol>
<li>The ''Design Authority'' is responsible for determining the appropriate ''waterproofing system'' design and must consider (without limitation)
<ol>
<li>the requirements of the building code having jurisdiction,
<li>the structural capabilities or limitations of the building,
<li>fire resistance and class requirements for the building,
<li>wind loads (See [[#Part 3 - Securing the Roof Assembly | Part 3]] of this Standard),
<li>the effects of nearby structures on the ''waterproofing assembly'',
<li>the potential effects of reflected heat on the ''waterproofing assembly'',
<li>''waterproofing system'' aesthetics, and
<li>maintenance requirements, including the safety of maintenance workers.
</li></ol>
</li></ol>

===1.1.2. Guarantee Requirements===
====1.1.2.1. RoofStar 5-Year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
<li>In addition to Sentence (1), all ''projects'' shall comply with
<ol>
<li>the ''project'' specifications and drawings, and
<li>the ''manufacturer's'' published installation requirements.
</li></ol>
</li></ol>

====1.1.2.2. Reserved====

====1.1.2.3. Quality Control====

<ol>
<li>Notwithstanding any other requirements in this Standard, the ''Contractor'' shall
<ol>
<li>bid the ''project'' to meet the more stringent of this Standard or the ''project'' specifications,
<li>bid the ''project'' to include only RGC-accepted systems and materials,
<li>ensure that the supporting ''waterproofing assembly'' conforms to the requirements and limitations of [[#1.1.3.1. Permitted Roof Systems | Article 1.1.3.1.]],
<li>notify the ''Observer'' at least 24 hours before construction is scheduled to start or resume (72 hours notice is required for ''projects'' further than 100 km from the nearest "Free Zone" city location), and then daily, before work resumes,
<li>ensure that construction conforms to this Standard and exhibits good workmanship,
<li>ensure that samples, reports, shop drawings, ELD arrangements, certificates, manufacturer approvals, warranty documentation, and all other submittals are collected and provided to the '''''Guarantor''''' as required in [[#1.3.2.4. Contractor Submittals | Article 1.3.2.4.]], and
<li>abide by all pertinent RCABC policies.
</li></ol>
</li></ol>

====1.1.2.4. Quality Assurance====
(See [[Notes to GLW Standard#A-1.1.2.4. Quality Assurance | Note A-1.1.2.4.]])

<ol>
<li>Notwithstanding any other requirements in this Standard, the ''Observer'' shall
<ol>
<li>verify that the materials used in construction are accepted by the '''''Guarantor''''' and listed in [[Division C | Division C]] of this ''Manual'',
<li>review the construction of the ''waterproofing system'' (according to the prescribed number of observations, with consideration for the expected duration of construction) for conformance with the more stringent of
<ol>
<li>this Standard,
<li>conditions and limitations in [[Division A | Division A]] of the RPM, as they apply,
<li>the ''manufacturer’s'' published requirements,
<li>the ''project'' drawings and specifications, or
<li>the Building Code having jurisdiction.
</li></ol>
<li>review and report whether the ''Contractor'' has met the RCABC policy requirements noted in this Standard, and
<li>perform cut tests or other acceptable methods, whenever required, to verify that the materials and methods of construction conform to this Standard (for example, this may be required when the ''Contractor'' has completed more than 30 squares of waterproofing without an observation).
</li></ol>
</li></ol>

===1.1.3. All Systems===
====1.1.3.1. Permitted Waterproofing Systems====
(See [[Notes to GLW Standard#A-1.1.3.1. Permitted Waterproofing Systems | Note A-1.1.3.1.]])

<ol>
<li>This Standard applies only to uninsulated or protected ''waterproofing systems'' installed on structural ''decks'' that touch grade; repairs or renovations to in-service ''waterproofing systems'' do not qualify for a '''''RoofStar Guarantee'''''.
</li></ol>

====1.1.3.2. Accessibility for Maintenance====

<ol>
<li>Each ''waterproofing assembly'' should be designed to provide safe access for maintenance of roof drains, corners, or mechanical equipment, where the roof is at least 3 m (10’) above the surface of the ground, or where a hazard to a person exists, should a fall be possible (this principle also applies to roof areas intended for regular occupancy); design elements to mitigate fall hazards should align with the Code having jurisdiction, and with the ''Workers Compensation Act Regulations'', and should include
<ol>
<li>tall parapets,
<li>guardrails, or
<li>tie-off anchors.
</li></ol>
</li></ol>

====1.1.3.3. Membrane Integrity Testing====
(See [[Notes to GLW Standard#A-1.1.3.3. Membrane Integrity Scans | Note A-1.1.3.3.]] and '''Figure 1.1.3.3.-A''')

<ol>
<li>Electrical current membrane integrity testing shall conform to
<ol>
<li>ASTM D7877, "Standard Guide for Electronic Methods for Detecting and Locating Leaks in Waterproof Membranes", or
<li>ASTM D8231, "Standard Practice for the Use of Low Voltage Electronic Scanning System for Detecting and Locating Breaches in Roofing and Waterproofing Membranes."
</li></ol>
<li>An electrical current membrane integrity test is required when anyone other than the ''Contractor'' installs ''overburden'', amenities, or equipment, prior to the installation of any overburden or wearing course (In this Standard, the term "electrical current membrane integrity test" means a test method that uses electrical current and electronic sensing technology to detect breaches in the membrane ''system'').
<li>An electrical current membrane integrity test is required when the ''Contractor'' installs ''overburden'', amenities, or equipment, but only when
<ol>
<li>the total ''project'' area (footprint), inclusive of planters or other waterproofed features, exceeds 18.58 m2 (200 sf), and
<li>''overburden'', amenities, or equipment exceed 152.4 mm (6”) in depth
</li></ol>

<li>An electrical current membrane integrity test must be performed by an RGC-recognized service provider listed in [[Division_C | Division C]].
<li>If flood testing is specified, it shall be conducted prior to the installation of insulation and roof coverings, and must be executed in keeping with ASTM D5957, "Standard Guide for Flood Testing Horizontal Waterproofing Installations".
</li></ol>
</li></ol>
 
::{|
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 1.1.3.3.-A Electronic Integrity Testing''' Forming Part of Article 1.1.3.3. (Click to expand illustration)
|-
| [[File:Figure 1.1.3.3.-A.jpg |link=https://rpm.rcabc.org/images/2/2a/Figure_1.1.3.3.-A.jpg | 800 px]]
|}

====1.1.3.4. Electronic Leak Detection====
(See [[Notes to GLW Standard#A-1.1.3.4. Electronic Leak Detection| Note A-1.1.3.4.]])

<ol>
<li>Electronic Leak Detection (ELD) shall conform to
<ol>
<li>ASTM D7877, "Standard Guide for Electronic Methods for Detecting and Locating Leaks in Waterproof Membranes", or
<li>ASTM D8231, "Standard Practice for the Use of Low Voltage Electronic Scanning System for Detecting and Locating Breaches in Roofing and Waterproofing Membranes."
</li></ol>
<li>Electronic Leak Detection (ELD)
<ol>
<li>is required for all ''waterproofing assemblies'' that are covered with inaccessible ''overburden'',
<li>is strongly recommended for ''waterproofing assemblies'' with accessible ''overburden'',
<li>shall provide detection capabilities for all waterproofing surfaces, and
<li>must extend at least 50.8 mm (2") vertically from the ''drainage plane'' at
<ol>
<li>all transitions,
<li>any point along the entire deck perimeter, and
<li>protrusions.
</li></ol>
</li></ol>
<li>Where the electronic leak detection system utilizes a sensor ribbon (tape) installed on the waterproofing membrane in a grid pattern, the ribbon spacing shall be no more than three (3) metres, measured in any direction, irrespective of the type or depth of ''overburden.''
</li></ol>

====1.1.3.5. Hot Works====

(See [[Notes to GLW Standard#A-1.1.3.5. Hot Works| Note A-1.1.3.5.]])

<ol>
<li>The ''Design Authority'' may specify that the ''Contractor'' must maintain compliance with the RCABC Hot Works Program and consequently manage the Hot Works conducted on site (See [[#1.3.2.1. Hot Works: Contractor Requirements | Article 1.3.2.1.]]).
<li>When the ''project'' involves Hot Work, the ''Design Authority'' must either
<ol>
<li>pre-approve alternate applications already written in this Standard or another applicable Standard published in this ''Manual'', when the specified application is deemed to be fire-sensitive by the ''Contractor'' as part of the risk assessment process, or
<li>provide alternate material and application requirements in the Specification for fire sensitive locations on the ''project''.
</li></ol>
</li></ol>

====1.1.3.6. Variances====

<ol>
<li>When a design is unable to conform to the Standard, the ''Design Authority'' may apply to the RGC for a written Variance.
<li>Application for a written Variance must be made in writing (email correspondence is common), and must
<ol>
<li>identify the ''project'' name and its civic address,
<li>identify the '''''RoofStar Guarantee''''' number (if assigned),
<li>identify the ''Contractor'' (if awarded),
<li>articulate the nature of the design problem,
<li>identify the '''''RoofStar Guarantee''''' requirement to be varied, and state the desired modification (i.e., reduce the requirement for 203.2 mm (8") to 152.4 mm (6")),
<li>cite the reference to which the Variance will apply (i.e., Standard name, article number, sentence number, etc.), and
<li>provide design drawings, photographs, and ''project'' plans, referencing grid lines that identify or articulate the boundaries to which the Variance will be applied.
</li></ol>
<li>Variances are issued by the '''''RGC''''' only to the ''Design Authority'' and will be distributed to the ''Contractor''.
<li>The '''''Guarantor''''' reserves all rights to vary a requirement in a Standard without restrictions, to limit coverage on any part or the whole of a ''project'', or to impose design or construction conditions on a ''project''.
<li>Variances are issued only for the ''project''-specific issue identified in the written request, and do not constitute general permission to depart from the published requirements in this Standard, for any aspect of the same ''project'' or for future ''projects'', designed or constructed by any other firm.
</li></ol>

===1.1.4. Replacement and Alterations===

(The requirements in [[#1.1.3. All Systems | Subsection 1.1.3., "All Systems"]], shall be read together with the following Articles)
(See [[Notes to SBS Standard#A-1.1.4. Alterations and Additions | Note A-1.1.4.]])

====1.1.4.1. General Requirements====

<ol>
<li>Unless expressly permitted otherwise in this Standard, the design for replacement ''waterproofing systems'' shall conform to the requirements for new waterproofing in this Standard.
</li></ol>

====1.1.4.2. Complete Waterproofing System Replacement====

<ol>
<li>Complete ''waterproofing system'' replacement shall conform to the general requirements in [[#1.1.4.1. General Requirements | Article 1.1.4.1.]], unless expressly varied elsewhere in this Standard.
<li>''Waterproofing system'' replacement means the complete removal of membranes, insulation, drainage boards, filtration materials, and metal flashings, replacing them with only new materials.
<li>Where a ''waterproofing system'' ties into air and in-service ''control layers'' in adjacent ''wall'' assemblies, the decision to reuse and repair those ''control layers'' remains the responsibility of the ''Design Authority'' but shall nevertheless be subject to the requirements in [[#Part 6 - Air and Vapour Controls | Part 6, Air and Vapour Controls]] with respect to continuity.
<li>''Waterproofing system'' replacement ''projects'' are eligible to qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', subject to their respective requirements.
</li></ol>

====1.1.4.3. Partial Waterproofing System Replacement====

<ol>
<li>Partial replacement of a ''waterproofing system'' is permissible, but only when the waterproofing membrane and membrane flashing is replaced (other in-service materials may be replaced or retained, as elected by the ''Design Authority''), but coverage under a '''''RoofStar Guarantee''''' is limited to new materials supplied and installed by the ''Contractor''.
<li>Retention of insulation materials in a ''waterproofing system'' is subject to the requirements for insulation in [[#Part 7 - Insulation | Part 7]].
<li>The reinstallation of all retained materials shall conform to this Standard, irrespective of how they were originally installed.

</li></ol>

====1.1.4.4. Membrane Recovering====
(See [[Notes to GLW Standard#A-1.1.4.4. Membrane Recovering | Note A-1.1.4.4.]])

<ol>
<li>Recovering (installing a new ''waterproofing system'' membrane over an in-service membrane system) is not a recommended practice and will limit the scope of coverage under the '''''RoofStar Guarantee'''''.
<li>A '''''RoofStar Guarantee''''' issued for a recovered ''waterproofing system'' membrane is limited strictly to the value of new ''waterproofing system'' materials; in-service materials left in place or reinstated are not covered by the '''''RoofStar Guarantee'''''.
<li>All membrane recovering ''project'' specifications and drawings shall reflect and conform to the construction requirements in [[#1.3.3.4. Membrane Recovering | Article 1.3.3.4.]]
<li>Recovering a ''waterproofing system'' membrane is acceptable to the Guarantor only when the following conditions have been satisfied, together with any other applicable requirements published in this Article or in [[#1.3.3.4. Membrane Recovering | Article 1.3.3.4.]]:
<ol>
<li>the in-service ''waterproofing system'' membrane has never before been recovered (recovering is not permitted over a previously recovered ''waterproofing system'' membrane),
<li>the in-service membrane is free of blisters, damage, seam failures, or breaches, and is still fully bonded to the deck,
<li>in-service or new waterproofing system components installed on top of the recovered membrane must conform to the usual design, material, and construction requirements of this Standard, including wind load requirements,
<li>the recovering specifications, plans, and detail drawings have been provided to, and reviewed by, the Guarantor prior to the tendering of the project,
<li>the Guarantor has issued a written Variance that expressly permits recovering and outlines the conditions and limitations under which recovering may proceed, and
<li>the Design Authority has satisfied the submittal requirements for recovering, in this Standard.
</li></ol>
<li>Before proceeding with roof recovering, the ''Design Authority'' should consider
<ol>
<li>the requirements for moisture testing (described below),
<li>testing securement of materials to be left in place, and
<li>the potential consequences of failure for the building and its use.
</li></ol>
<li>To qualify for a written Variance from the '''''Guarantor''''', the Variance request (See [[#1.1.3.6._Variances |Article 1.1.3.6.]])
<ol>
<li>must identify the type of ''waterproofing system'' to which the Variance pertains (i.e., ''uninsulated'' or ''protected waterproofing system''),
<li>must specify how the in-service ''waterproofing system'' will be physically separated from other roof areas, and
<li>must include the formal independent report that describes the condition of the in-service ''waterproofing system'', and which documents results from cut tests and moisture investigation that are prerequisites for a '''''RoofStar Guarantee'''''.
</li></ol>
<li>In-service ''uninsulated'' and ''protected waterproofing systems'' presented to the '''''Guarantor''''' in a written Variance application by the ''Design Authority'' must be free of blisters and breaches in the membrane.
</li></ol>

====1.1.4.5. Tie-ins, Additions, and Alterations to Existing Waterproofing====

<ol>
<li>When a new ''waterproofing system'' adjoins an in-service ''waterproofing system'' and structural movement between the two is anticipated, an ''expansion joint'' must be used to tie the new system to the in-service system.
<li>If ''project'' conditions do not allow for a ''curb'' joint between new and in-service ''waterproofing systems'', the ''Design Authority'' must submit an alternative design and obtain a written Variance from the '''''Guarantor''''' that permits the elimination of curb joints (see [[#1.1.3.6. Variances | Article 1.1.3.6. Variances]]); any alternative design
<ol>
<li>must include design specifications and construction details showing a positive water cut-off that fully isolates the in-service ''waterproofing system'' from the new ''waterproofing system'', and
<li>shall show how the new ''waterproofing system'' will be easily distinguishable from the existing ''waterproofing system'', and
<li>may be made with the saw-cut method (see [[#1.3.3.5. Tie-ins, Additions, and Alterations to Existing Waterproofing | Article 1.3.3.5.]]), provided the connection between a new ''waterproofing system'' and an in-service ''waterproofing system'' will be free of structural movement.
</li></ol>
<li>Repairs or renovations to an existing ''waterproofing system'' that is not covered by a '''''RoofStar Guarantee''''' do not qualify for a '''''RoofStar Guarantee''''' (the term "renovation" means the removal and replacement of, or the application of a cover to, a portion of the ''waterproofing system'').
<li>Modifications or additions to a ''waterproofing system'' covered by an active '''''RoofStar Guarantee''''' are permissible, subject to various conditions, but must be made by a ''Contractor'' qualified to perform work under the '''''RoofStar Guarantee Program'''''.
</li></ol>

===1.1.5. Reserved===

==Section 1.2. Reserved==

==Section 1.3. Application==
===1.3.1. Reserved===
===1.3.2. All Systems===
====1.3.2.1. Hot Works: Contractor Requirements====

<ol>
<li>The ''Contractor'' must maintain the requirements of the RCABC Hot Works Program, including (without limitation)
<ol>
<li>'''Insurance Coverage''', wherein the limits carried on the ''Contractor’s'' policy must equal or exceed the minimum requirements set by RCABC, and coverage must be unhindered by warranties that limit or exclude coverage when Hot Works is required,
<li>'''Education and training''', since workers who perform Hot Works must be trained by the ''Contractor'' and kept current with acceptable methods,
<li>the [https://free.bcpublications.ca/civix/content/public/bcfc2018/?xsl=/templates/browse.xsl&xsl=/templates/browse.xsl "British Columbia Fire Code"], wherein a Fire Safety Plan, preventative methods or alternative work procedures, fire watches, and the use and placement of equipment at the ''project'' site must comply with the BC Fire Code requirements for Hot Work,
<li>a '''Fire Safety Plan''', whereby
<ol>
<li>the ''Contractor'' must assess the hazards to property and persons and produce a written Fire Safety Plan prior to the start of work, and
<li>the Fire Safety Plan must be kept on the ''project'' site and must be kept current until the ''project'' is completed,
</li></ol>
<li>'''RoofStar Guarantee Standards''', to which the ''Contractor'' must conform, at each juncture where the interface of different membranes applications constitutes part of the Fire Safety Plan,
<li>a '''Fire Watch''', in which the ''Contractor'' must, as part of the Fire Safety Plan, conduct a fire watch
<ol>
<li>that complies with the "British Columbia Fire Code",
<li>is assigned to competent, trained personnel using suitable equipment, including the use of a hand-held infrared thermometer, and
<li>is documented in a written fire watch log, and
</li></ol>
<li>'''Hot Works Notification''', wherein the ''Contractor'' shall notify the ''project'' authority or the AHJ, as and when required, that Hot Works will be performed.
</li></ol>
</li></ol>

====1.3.2.2. Workmanship====

(See [[Notes to GLW Standard#A-1.3.2.2. Workmanship | Note A-1.3.2.2.]])

<ol>
<li>The ''Contractor'' must take reasonable measures to protect the ''project'' from damage by the weather, during and at the completion of the ''project''.
<li>Open penetrations and flashings must be temporarily sealed off from the weather, even when other trades are responsible for making a permanent seal or installing overlapping materials (See [[#4.2.1.1. Use of Accepted Materials | Article 4.2.1.1.]]).
</li></ol>

====1.3.2.3. Contractor Qualifications====

<ol>
<li>Supervision and installation of a RoofStar-guaranteed ''waterproofing system'' may be conducted only by established employees of the ''Contractor'', and every ''project'' must be supervised by a Journeyperson employee who holds a valid ticket.
<li>A Journeyperson may supervise a maximum of three (3) apprentices and/or three (3) labourers (Ref. RCABC Policy A-248).
</li></ol>

====1.3.2.4. Contractor Submittals====

<ol>
<li>The ''Contractor'' shall submit to the '''''Guarantor''''', before a '''''RoofStar Guarantee''''' is issued, any and all required samples, reports, shop drawings, ELD arrangements, certificates, and ''manufacturer'' approvals.
</li></ol>

===1.3.3. Replacement and Alterations===
(The requirements in [[#1.3.2. All Systems | Subsection 1.3.2., "All Systems"]], shall be read together with the following Articles)

====1.3.3.1. General Requirements====

<ol>
<li>Unless expressly permitted otherwise in this Standard, all replacement waterproofing shall conform to the requirements for new waterproofing in this Standard.
</li></ol>

====1.3.3.2. Complete Grade-level Waterproofing System Replacement====

<ol>
<li>See the requirements throughout this Standard, which apply to both new construction and replacement of a waterproofing membrane.
</li></ol>

====1.3.3.3. Partial Grade-level Waterproofing System Replacement====

<ol>
<li>See the requirements throughout this Standard, which apply to both new construction and replacement of a waterproofing membrane.
</li></ol>

====1.3.3.4. Membrane Recovering====
(See [[#1.1.4.4. Membrane Recovering | Article 1.1.4.4.]])

<ol>
<li>Recovering shall not proceed unless permitted by a written Variance issued by the '''''Guarantor''''' prior to the tendering of the ''project''.
<li>All wet material identified by either the independent moisture detection survey or through cut tests shall be removed in the course of construction.
<li>When recovering any in-service ''project'' waterproofed with sheet membrane, the membrane must be
<ol>
<li>clean and free of debris, gravel, blisters, or damage, and
<li>cut through at the perimeter change in plane to relieve any tension or distortions in the membrane.
</li></ol>
<li>When recovering the membrane of a ''waterproofing system'', the means and methods shall conform to the requirements published in Article 1.3.3.4. of the roofing Standard for the permissible membrane.
<li>In-service built-up ''waterproofing systems'' (typically constructed with felt and asphalt) must be spudded clean of gravel, and any loose plies shall be removed.
<li>New membrane system materials must be properly secured to the underlying ''waterproofing assembly''.
<li>All membrane recovering projects must incorporate only new
<ol>
<li>strip-in flashings for penetrations (Ref. [[#Part 12 - Penetrations and Curbs |Part 12]]),
<li>''drains'' (cast-iron drains in usable condition are exempted from this requirement; see [[#11.3.3.2. General Requirements for Cast-iron Roof Drains | Article 11.3.3.2.]]), and
<li>''linear metal flashings'' (Ref. [[#Part 13 - Linear Metal Flashing |Part 13]]).
</li></ol>
</li></ol>

====1.3.3.5. Tie-ins, Additions, and Alterations to Existing Waterproofing====

<ol>
<li>Where a new ''waterproofing system'' adjoins and ties into an existing ''waterproofing system'', the two areas must be isolated and separated by a ''curb'' joint securely attached to the structure and waterproofed in keeping with the requirements for control joints ( [[#10.1.6.2. Control Joints (System Dividers) | Article 10.1.6.2.]] and [[#10.3.6.2. Control Joints (System Dividers) | Article 10.3.6.2.]]).
<li>If the ''Design Authority'' has obtained from the '''''Guarantor''''' a written Variance that permits the elimination of ''curb'' joints, the new ''waterproofing system'' must be fully isolated from the in-service ''waterproofing system'' with a positive water cut-off at the drainage plane:
<ol>
<li>the adjoining membranes must be compatible with each other and of the same membrane system type (e.g., Polymer-modified Bituminous Membranes),
<li>an authorized technical representative for the ''manufacturer'' of the new membrane must provide signed and dated written consent for this detail,
<li>the two areas must be isolated and separated from each other by a water cut-off as required below and illustrated in '''Figure 1.1.4.5.-A''':
<ol>
<li>a saw cut 12.7 mm (1/2”) wide and deep must be made in the new deck, at least 304.8 mm (12”) away from the adjacent ''waterproofing assembly'',
<li>the saw cut must be filled with a membrane-compatible mastic acceptable to the ''manufacturer'',
<li>new membranes should be installed in the same direction as the adjoining in-service membranes,
<li>the new base sheet must span the saw cut and extend past it by at least terminate no closer than 152.4 mm (6”) from the ''control joint'' securely attached to the structure and waterproofed in keeping with the requirements in both Article 10.1.6.2., "Control Joints (Roof Dividers)", and Part 10, "Perimeters and Walls" of the applicable membrane Standard for roofs, and
<li>the new ''waterproofing system'' must be easily distinguishable from the in-service system.
</li></ol>
</li></ol>
</li></ol>

====1.3.3.6. Repairs and Modifications====

<ol>
<li>When a ''waterproofing system'' that is covered by an active (unexpired) '''''RoofStar Guarantee''''' has been damaged or otherwise requires repairs, work shall conform to the specifications of the material manufacturers, and to the requirements in this Standard, with respect to (without limitation)
<ol>
<li>the securement of new materials ([[#Part 3 - Securing the Waterproofing Assembly | Part 3]]),
<li>deck or wall overlays ([[#Part 5 - Deck and Wall Overlays | Part 5]]),
<li>''continuity'' of air and vapour controls ([[#Part 6 - Air and Vapour Controls | Part 6]]),
<li>thermal resistance and insulation overlays ([[#Part 7 - Insulation | Part 7]] and [[#Part 8 - Insulation Overlays | Part 8]]),
<li>membranes ([[#Part 9 - Membrane System Field | Part 9]]),
<li>membrane flashing ([[#Part 10 - Perimeters and Walls | Part 10]]),
<li>drains ([[#Part 11 - Drainage | Part 11]]),
<li>penetrations and curbs ([[#Part 12 - Penetrations and Curbs | Part 12]]), and
<li>linear metal flashings ([[#Part 13 - Linear Metal Flashing | Part 13]]).
</li></ol>
<li>Modifications to an in-service ''waterproofing system'' covered by an active (unexpired) '''''RoofStar Guarantee''''', including (without limitation) the addition of new ''curbs'', ''drains'', or penetrations, shall conform to all the requirements in this Standard, or as otherwise stated.
</li></ol>

===1.3.4. Reserved===

<hr>
<div id=PART_2></div>

=Part 2 - Supporting Structures: Decks and Walls=
(See [[Notes to GLW Standard#A-2 | Note A-2]])

==Section 2.1. Design==
===2.1.1. General===
====2.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====2.1.1.2. Defined Terms====
(See '''Figure 2.1.1.2.-A''')

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Common Slope'' means a slope 1:3 (4” in 12”, or 18 degrees), up to and including 1:1 (12” in 12”, or 45 degrees).
<li>''Deck overlay'' means a panel material secured to the ''supporting deck'', to render the deck surface suitable for the installation of roofing materials.
<li>''Extreme Slope'' means a slope greater than 21:12 (21” in 12”, or 84 degrees).
<li>''Flat'' means a slope less than 1:6 (2” in 12”, or 9 degrees).
<li>''Low Slope'' means a roof with a slope 1:6 (2" in 12", or 9 degrees, up to but less than 1:3 (4” in 12”, or 18 degrees).
<li>''Sheathing'' means a rigid panel material secured directly onto framing.
<li>''Steep Slope'' means a slope greater than 1:1 (12” in 12”, or 45 degrees) up to and including 21:12 (21” in 12”, or 84 degrees).
<li>''Supporting deck'' ("deck"), as used in this Standard, means the "structural surface to which a ''waterproofing system'' is applied" (adapted from ''ASTM D1079-18 Standard Terminology Relating to Roofing and Waterproofing'').
<li>''Wall'' means a structural or non-structural element in a building that vertically separates space. ''Walls'' may separate the outside environment from the interior conditioned space of a building, or they may separate one or more interior spaces from each other (adapted from ASTM E631-15, "Standard Terminology of Building Constructions").
<li>''Wall overlay'' means a panel material secured to the surface of a ''wall'', to render it suitable for the installation of waterproofing or ''wall'' cladding materials.
</li></ol>
</li></ol>
 
:::{|
|-
| colspan="1"; style="text-align:center;width:500px;" | '''Figure 2.1.1.2.-A Roof Slope''' Forming Part of Article 2.1.1.2. (Click to expand illustration)
|-
| [[File:Figure 2.1.1.2.-A (Slopes).jpg|link=https://rpm.rcabc.org/images/4/4d/Figure_2.1.1.2.-A_%28Slopes%29.jpg| 600 px]]
|}

===2.1.2. Guarantee Term Requirements===
====2.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====2.1.2.2. Reserved====

===2.1.3. All Systems===
====2.1.3.1. General Requirements for Roof Slope====

<ol>
<li>The ''Design Authority'' must design the slope of a ''deck'' to achieve proper drainage and must take into consideration the anticipated deflection and settlement of the structure, which may interfere with drainage.
<li>While good drainage is desirable but not always perfectly achievable, and ''waterproofing systems'' generally are not affected by standing water, each ''project'' design should incorporate sufficient slope to move water off the ''waterproofing system'' surface.
<li>"Sufficient slope", which is subject to conditions that permit evaporation, shall mean that no standing water remains on the ''waterproofing system'' surface after a reasonable interval following a rainfall.
<li>''Deck'' slope should be increased beyond the minimums published in this Standard when local climate conditions, such as rainfall frequency or severity, result in ongoing or significant ponding conditions (see [[#2.1.3.2. Deck Slope for New Construction | Article 2.1.3.2.]] and [[#2.1.3.3. Slope for Replacement Roofing | Article 2.1.3.3.]] for minimum requirements).
<li>Drainage (slope toward plumbing ''drains'') should be achieved (in descending order of best practices) with
<ol>
<li>four-way slope to ''drain'',
<li>slope to a common valley, or to gutters, or
<li>positive sloping valleys to ''drains''.
</li></ol>
</li></ol>

====2.1.3.2. Deck Slope for New Construction====

<ol>
<li>All new construction waterproofing should be designed and built with a slope of no less than 2% (1/4” in 12”), measured on the primary sloped planes of the system, but positive slope off the ''deck'' or to drains is required.
<li>Where practicable, ''drains'' should be located mid-span on a ''deck'' between supporting columns or walls, especially when ''deck'' slopes are less than 1:50 (1/4” in 12”), to take advantage of ''deck'' deflections from future loads.
</li></ol>

====2.1.3.3. Slope for Replacement Waterproofing====

<ol>
<li>Replacement ''waterproofing systems'' may qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''' without correcting poor drainage, though the elimination of ponding (standing water) is strongly recommended.
</li></ol>

====2.1.3.4. Deck Condition and Suitability for Waterproofing====

<ol>
<li>The Code having jurisdiction prevails in all cases except where it is exceeded by the requirements published in this Standard.
<li>Notwithstanding the requirements in this Standard, the '''''RoofStar Guarantee''''' does not cover the ''supporting deck'' material or its attachment to the building structure, which is the responsibility of the ''Design Authority'' and the building contractor.
<li>The supporting ''deck'' must be dimensionally stable, resist deflection from dead and live loads, and must be capable of accommodating ''waterproofing system'' component movement.
<li>''Walls'', ''parapets'', ''curbs'', blocking, and penetrations should be constructed or placed by other trades prior to the commencement of waterproofing work.
</li></ol>

====2.1.3.5. Drainage Around Obstructions====

<ol>
<li>''Curbs'' that span 2438.4 mm (96") or more when measured perpendicular to roof slope, across the direction of drainage, should be designed with a cricket to divert water around the ''curb''.
</li></ol>

===2.1.4. Reserved===
===2.1.5. Structural Decks===
====2.1.5.1. Steel Roof Decks====
(See [[Notes to GLW Standard#A-2.1.5.1.| Note A-2.1.5.1.]]) (See also [[#Part 9 - Roof Field (Membrane Systems) | Part 9]] and [[#Part 10 - Perimeters and Walls | Part 10]] for substrate preparation requirements)

<ol>
<li>Although not as common as concrete, steel structural ''decks'' must be acceptable to the ''manufacturer'' and must conform to either
<ol>
<li>ASTM Standard Specification A653 / A653M, "Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process": Structural (Physical) Quality, minimum Grade 33, with a design thickness of 22-gauge (0.759 mm) or greater and a minimum zinc coating designation ''Z275'', or
<li>ASTM Standard Specification A792 / A792M, "Steel Sheet, Aluminum-Zinc Alloy-Coated by the Hot-Dip Process": General Requirements, minimum Grade 33, with a design thickness of 22-gauge (0.759 mm) or greater and a minimum aluminum-zinc alloy coating designation ''AZ150''.
</li></ol>
<li>Steel ''deck'' panels must be properly aligned, squarely intersect walls, and provide a smooth level surface for waterproofing.
<li>Steel ''decks'' that receive poured concrete overlays shall have vented pans to prevent entrapment of moisture; this work is by other trades.
</li></ol>

====2.1.5.2. Concrete Decks====
(See [[Notes to GLW Standard#A-2.1.5.2.| Note A-2.1.5.2.]])

<ol>
<li>Cast-in-place and precast concrete ''decks'' must cure for at least 28 days before receiving an adhered waterproofing membrane ("adhered", as it is used in this requirement, means fully or intermittently bonding any membrane to the ''deck'' with an adhesive, hot asphalt (bitumen), or heat), but this limitation may be reduced if
<ol>
<li>both the building envelope engineer and the ''manufacturer'' expressly permit membrane application within the first 28 days after pouring, and
<li>their respective signed letters of permission are furnished to the '''''Guarantor''''' forthwith, to be included with the ''project'' record.
</li></ol>
<li>Shotcrete-formed concrete decks are not an acceptable substrate for the application of sheet membranes.
</li></ol>

====2.1.5.3. Wood Decks====

<ol>
<li>Wood decks are not acceptable substrates for ''waterproofing systems'' covered under the '''''RoofStar Guarantee Program'''''.
</li></ol>

===2.1.6. Reserved===

===2.1.7. Walls===
(See [[Notes to GLW Standard#A-2.1.7.| Note A-2.1.7.]])

====2.1.7.1. General====
<ol>
<li>''Wall'' surfaces must be clean, dry, and smooth, suitable for the application of ''waterproofing system'' materials.
<li>''Wall'' framing must be sheathed with a material suitable for adhering waterproofing membranes and securing metal flashings; when sheathing is unsuitable, it must be overlaid with an accepted wall overlay.
<li>''Sheathing'' is considered a wall surface for the purpose of this Standard.
<li>''Wall'' surfaces suitable for receiving ''waterproofing'' materials must extend beyond the maximum installed height of the ''waterproofing'', but in any event must be installed at least 203.2 mm (8”) above the ''finished system surface'' (For ''wall'' overlays, refer to [[#5.2.1.3. Overlays for Walls | Article 5.2.1.3.]]).
<li>Indirect connections between ''walls'' and the structural ''deck'' require a ''control joint'' (See [[Notes to GLW Standard#A-10.1.6.2. | Note A-10.1.6.2.]]).
</li></ol>

===2.1.8. Reserved===

==Section 2.2. Materials==
===2.2.1. Material Properties===
====2.2.1.1. Sheathing for Framed Walls====

<ol>
<li>Framed wall sheathing must be
<ol>
<li>moisture resistant fibreglass-faced silicon treated gypsum core board, with a minimum thickness of 12.7 mm (1/2”) (These panels are specifically designed to receive waterproofing membranes and may be installed horizontally or vertically).
<li>fibre-reinforced cementitious panels with a minimum thickness of 9.53 mm (3/8"), or
<li>plywood, having a minimum thickness of 12.7 mm (1/2”).
</li></ol>
<li>Where ''wall'' sheathing is unsuitable to receive waterproofing materials, refer to [[#Part 5 - Deck and Wall Overlays | Part 5, "Deck and Wall Overlays"]].
</li></ol>

==Section 2.3. Application==
===2.3.1. Guarantee Term Requirements===
====2.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

===2.3.2. All Systems ===
====2.3.2.1. Construction of Decks and Walls====

<ol>
<li>Unless otherwise permitted and described in this Standard, the construction of ''deck'' and ''wall'' structures, and their suitability for the application of waterproofing materials, is the responsibility of other trades.
</li></ol>

<hr>
<div id=PART_3></div>

=Part 3 - Securing the Waterproofing Assembly=

==Section 3.1. Design==
===3.1.1. General===
====3.1.1.1. Scope====
(See [[Notes to GLW Standard#A-3.1.1.1.| Note A-3.1.1.1.]])

<ol>
<li>For waterproofing assemblies that are exposed to wind, refer to the design, material, and application requirements for wind resistance, published in Part 3 of the published RGC Standard for the specific membrane, for uninsulated or insulated (protected) systems:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#Part_3_-_Securing_the_Roof_Assembly Part 3] in the RGC Standard for SBS-modified Bituminous Membrane Roofs.
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#Part_3_-_Securing_the_Roof_Assembly Part 3] in the RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs.
</li></ol>
</li></ol>

<hr>
<div id=PART_4></div>

=Part 4 - Materials=
==Section 4.1. Design==
===4.1.1. General===
====4.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====4.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Primary Material'', as used in this Standard, means a material used in a ''waterproofing system'' that is manufactured for exposure to the weather.
<li>''Secondary Material'', as used in this Standard, means a material that is used in a ''waterproofing system'' that is not usually exposed to the weather.
</li></ol>
</li></ol>

==Section 4.2. Materials==
===4.2.1. Material Properties===
====4.2.1.1. Use of Accepted Materials====
(For limitations and exclusions pertaining to materials, see [[Guarantee#3.2.1.2. Limitations and Exclusions of Guarantee | Division A, Article 3.2.1.2.]])

<ol>
<li>All materials installed by the ''Contractor'', for new construction or alterations, must be
<ol>
<li>newly manufactured (except for reusable insulation; see [[#7.1.3.2. General Requirements | Article 7.1.3.2.]]), and may not be recycled without the expressed, written consent of the '''''Guarantor''''',
<li>accepted by the '''''RoofStar Guarantee Program''''', and
<li>manufactured by, or listed as acceptable to, the manufacturer of the ''primary material''.
</li></ol>
<li>All uninstalled materials must be
<ol>
<li>protected from weather with wrappers approved or recommended by the ''manufacturer'',
<li>properly stacked, and
<li>secured above ground or on the ''project'' surface.
</li></ol>
<li>All installed roofing materials that are susceptible to moisture damage must be made watertight by the end of each workday.
<li>Metals and fasteners must be compatible with each other, to avoid galvanic corrosion which can occur when dissimilar metals contact each other.
</li></ol>

==Section 4.3. Application==
===4.3.1. Guarantee Term Requirements===
====4.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====4.3.1.2. Reserved====

===4.3.2. All Systems===
====4.3.2.1. Application of New Materials====

<ol>
<li>All new materials installed as part of the ''waterproofing system'' shall conform to the ''manufacturer's'' published requirements, unless superseded by this Standard.
</li></ol>

<hr>
<div id=PART_5></div>

=Part 5 - Deck and Wall Overlays=
(See [[Notes to GLW Standard#A-5| Note A-5]])

==Section 5.1. Design==
===5.1.1. General===
====5.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====5.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===5.1.2. Guarantee Term Requirements===
====5.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====5.1.2.2. Reserved====

===5.1.3. All Systems===
====5.1.3.1. Required Use of Overlays====
(See [[#Part 9 - Membrane System field) | Part 9]] and [[#Part 10 - Perimeters and Walls | Part 10]] for substrate preparation requirements)

<ol>
<li>Two layers of fibre-reinforced cement board deck overlay conforming to the requirements in [[#5.2.1.1. Suitability of Overlays | Article 5.2.1.1.]] must be specified when the ''deck'' is steel.
<li>When wall sheathing is not suitable to receive waterproofing, at least one layer of an acceptable wall overlay conforming to [[#5.2.1.3. Overlays for Walls | Article 5.2.1.3.]] shall be specified for ''walls'' (other than concrete) that will receive waterproofing materials.
</li></ol>

==Section 5.2. Materials==
(See [[Division_C | Division C]])

===5.2.1. Material Properties===
====5.2.1.1. Suitability of Overlays====

<ol>
<li>''Deck'' and ''wall'' overlays must be
<ol>
<li>listed in [[Division_C | Division C]],
<li>acceptable to the ''manufacturer'',
<li>suitable for the type of ''deck'', and
<li>suitable for, and compatible with, any membrane or panel application.
</li></ol>
</li></ol>

====5.2.1.2. Overlays for Decks====

<ol>
<li>Only fibre-reinforced cementitious panels (boards) may be used on steel ''decks'' and shall be
<ol>
<li>manufactured in conformance with ASTM C1325 (latest edition), “Standard Specification for Fiber-Mat Reinforced Cementitious Backer Units”,
<li>at least 12.7 mm (1/2”) thick,
<li>acceptable to the ''manufacturer'',
<li>suitable for the type of ''deck'', and
<li>suitable for, and compatible with, any membrane or panel application.
</li></ol>
</li></ol>

====5.2.1.3. Overlays for Walls====

<ol>
<li>In addition to overlays listed in [[Division_C | Division C]], ''walls'' may be overlaid with
<ol>
<li>plywood, provided the plywood is least 12.7 mm (1/2”) thick and is pressure-treated when applied over concrete or concrete masonry units (CMU),
<li>Type A fibre-reinforced cementitious panels (boards) manufactured in conformance with ASTM C1325 (latest edition), “Standard Specification for Fiber-Mat Reinforced Cementitious Backer Units”, or
<li>inorganic moisture-resistant panels listed in [[Division_C | Division C]].
</li></ol>
</li></ol>

====5.2.1.4. Fasteners====

<ol>
<li>Refer to Article 3.2.2.1. of the related ''waterproofing roof'' Standard.
</li></ol>

==Section 5.3. Application==
(This Section shall be read in conjunction with the requirements for substrate preparation in [[#Part 9 - Roof Field (Membrane Systems) | Part 9]] and [[#Part 10 - Perimeters and Walls | Part 10]])

===5.3.1. Guarantee Term Requirements===
====5.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====5.3.1.2. Reserved====

===5.3.2. All Systems===
====5.3.2.1. Overlays on Concrete Decks====

<ol>
<li>A ''deck'' overlay board is not mandatory on a concrete ''deck'', but when it is specified, it must be installed to conform to the requirements in this Part.
</li></ol>

====5.3.2.2. Overlays on Steel Decks====

<ol>
<li>Steel decks must provide a smooth, even surface for waterproofing and therefore must be topped with concrete or overlaid with no fewer than two layers of fibre-mat reinforced cement boards.
<li>''Deck'' overlays must be
<ol>
<li>fully or intermittently supported along all edges by the ''deck'', and
<li>installed in a staggered pattern (offset) 304.8 mm (12") from adjacent board rows (a minus offset tolerance of 50.8 mm (2") maximum will be permitted to compensate for variance in the manufacturer's tolerance of differing board widths and lengths).
</li></ol>
<li>The base layer of ''deck'' overlays shall be affixed to the ''deck'' with mechanical fasteners or adhesives acceptable to the ''manufacturer'' specified by the ''Design Authority'' and conforming to the requirements in Article 3.2.2.1. or 3.2.2.2. of the related ''waterproofing roof'' Standard.
<li>When spacing requirements for fasteners are not provided by the ''Design Authority'', installation shall comply with the requirements in '''Table 5.3.2.2.-A'''.
<li>Only adhesives acceptable to the ''manufacturer'' shall be used to secure the second layer of ''deck'' overlays; mechanical fixation through both layers is not permitted.
<li>When the waterproofing membrane is liquid-applied (including hot-applied rubberized asphalt), all board joints that will receive liquid applied membrane systems must be taped with the waterproofing ''manufacturer's'' approved joint tape.
</li></ol>
 
::::{|
|-
|-
| colspan="4"; style="text-align:center;width:450px;" | '''Table 5.3.2.2.-A Minimum Fastener Requirements for Deck Overlay Fastening''' Forming Part of Article 5.3.2.2.
|-
|}
{| class="wikitable" style="margin-left: 20pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:center;"
|-
! Thickness !! Deck Flute Width !! Board Size !! Screws & Metal Stress Plates
|-
| 9.5 mm (3/8”) || up to 125 mm (5") || 1200 mm x 2400 mm (48" x 96") || 12
|-
| 12.7 mm (1/2") || up to 125 mm (5") || 1200 mm x 2400 mm (48" x 96") || 12
|-
| 15.9 mm (5/8") || up to 200mm (8") || 1200 mm x 2400 mm (48" x 96") || 12
|-
|}

====5.3.2.3. Overlays on Steel Decks with Concrete Topping====

<ol>
<li>A ''deck'' overlay is not required for steel ''decks'' topped with concrete..
</li></ol>

====5.3.2.4. Reserved====

====5.3.2.5. Support, Arrangement, and Securement of Wall Overlays====

<ol>
<li>All concrete or masonry ''parapets'' and ''walls'' must provide a smooth, clean, dry surface for membrane adhesion.
<li>When ''walls'' do not provide a smooth, clean, dry surface for membrane adhesion may be overlaid with a minimum 15.9 mm (5/8") treated plywood or 9.5 mm (3/8") reinforced cement board that conforms to Type A fibre-reinforced cementitious panels (boards) manufactured in conformance with ASTM C1325 (latest edition), “Standard Specification for Fiber-Mat Reinforced Cementitious Backer Units”.
<li>''Wall'' overlays must be mechanically attached or adhered to the wall with polyurethane an adhesive acceptable to the ''manufacturer''.
<li>When waterproofing is applied directly to masonry ''parapets'' or ''walls'', follow the applicable RGC roof Standard from [[Division B | Division B]].
<li>A ''parapet wall'' is required at adjoining walls where the ''deck'' is not supported by the ''wall'' (expansion joint) and shall be sheathed with minimum 15.9 mm (5/8") plywood or 9.5 mm (3/8") reinforced cement board that conforms to ASTM C1325-04.
<li>Wall sheathing shall be fastened to preservative treated blocking or to steel stud framing that is attached solidly to the ''deck'' and not the ''wall''.
<li>Compressible insulation is to be installed between the sheathing and the ''wall'' and an accepted expansion joint membrane as well as metal counter flashing shall be installed.
</li></ol>

<hr>
<div id=PART_6></div>

=Part 6 - Air and Vapour Controls=
(See [[Notes to GLW Standard#A-6 | Note A-6]])

==Section 6.1. Design==
===6.1.1 General===
====6.1.1.1. Scope====
(See [[Notes to GLW Standard#A-6.1.1.1. | Note A-6.1.1.1.]])

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====6.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Air barrier'' means a material that is manufactured and tested to prohibit the passage of air through that material.
<li>''Continuity'' means a sealed, resistive, continuous connection
<ol>
<li>between ''control layers'' that have the same function, and
<li>between a ''control layer'' and another material or object it joins to (i.e., a roof drain or penetration).
</li></ol>
<li>''Control layer'' means a material used in a ''waterproofing assembly'' or ''wall assembly'', that is manufactured and tested to resist or control the movement of air, vapour, or liquid water into or through that assembly.
<li>''Vapour retarder'' means a material that is manufactured and tested to prohibit or regulate the passage of water vapour through that material.
<li>''Water resistive barrier'' (WRB) means a material that is manufactured and tested to resist the transmission of liquid water through the material and is usually used in wall assemblies.
</li></ol>
</li></ol>

===6.1.2. Guarantee Term Requirements===
====6.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====6.1.2.2. Reserved====

===6.1.3. All Systems===
====6.1.3.1. Responsibility for Design====

<ol>
<li>The ''Design Authority'' is responsible for specifying
<ol>
<li>air and vapour control materials,
<li>the placement of continuous air and vapour ''control layers'' in relation to a ''waterproofing system'' and its components, and
<li>the selection of suitable materials for that application (See [[Notes to Hot Rubber Standard#A-6.1.3.1. | Note A-6.1.3.1.]]).
</li></ol>
<li>The ''Design Authority'' is urged to review and consider the performance characteristics of materials available for such applications.
<li>Coverage under the '''''RoofStar Guarantee''''' shall be as described in [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]].
<li>Notwithstanding coverage provisions in Division A, neither the '''''RoofStar Guarantee Program''''' nor the ''Contractor'' will accept any responsibility for damage to, or failure of, the ''waterproofing system'' caused by the use or absence of air or vapour ''control layers''.
</li></ol>

====6.1.3.2. Continuity of Control Layers====

<ol>
<li>The ''Design Authority'', and trades constructing walls and waterproofing assemblies, are jointly responsible for making proper connections (continuity) between air and vapour control ''systems'', including the transitions between assemblies built by different trades (See [[#6.1.3.1. Responsibility for Design | Article 6.1.3.1.]] and [[#6.3.2.1. Continuity and Support | Article 6.3.2.1.]]).
<li>Where air, vapour, or water ''control layers'' intersect a ''roof drain'', ''overflow drain'', ''scupper drain'', or penetration, the intersection must be designed for ''continuity'', and drawings must detail the execution of ''continuity'' for the ''Contractor''.
<li>''Overflow drains'' and ''scupper drains'' that penetrate ''wall assemblies'' must be designed and drawn to prevent air intrusion from the outside environment (See Article 3.1.5.1. in the related ''waterproofing roof'' Standard).
</li></ol>

====6.1.3.3. Use of Air Control Materials====

<ol>
<li>The ''Design Authority'' is responsible for the selection of air control materials (some air ''control layers'' are considered vapour permeable, others vapour-impermeable); ''waterproofing systems'' intended to qualify for a '''''RoofStar Guarantee''''' should be designed according to the regulatory design and installation requirements for effective, continuous air control ''systems''.
<li>All materials selected by the ''Design Authority'' should conform to the material and performance characteristics required in the "British Columbia Building Code", Division B,[https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp5s54 Article 5.4.1.2., "Air Barrier System Properties"].
</li></ol>

====6.1.3.4. Use of Vapour Control Materials====

<ol>
<li>Because continuous vapour ''control layers'' may be needed to limit “water vapour transmission and condensation, burn protection, and severe climatic conditions” (National Energy Code of Canada for Buildings 2020, [https://nrc-publications.canada.ca/eng/view/ft/?id=af36747e-3eee-4024-a1b4-73833555c7fa Article 5.2.5.3.(1), "Other Considerations"]; see also the "British Columbia Building Code", Division B, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp5s55 Article 5.5.1.1., "Required Resistance to Vapour Diffusion"]), they are considered discretionary and must be specified by the ''Design Authority''.
<li>Where continuous vapour ''control layers'' are required and specified by Code, the '''''RoofStar Guarantee Program''''' requires that a suitable vapour control ''system'' be selected by the ''Design Authority'' and properly installed by the ''Contractor'' in conformity with the vapour ''control layer'' manufacturer’s published instructions, and with the ''Design Authority’s'' specified details.
</li></ol>

====6.1.3.5. Reserved====

====6.1.3.6. Reserved====

==Section 6.2. Materials==
===6.2.1. Material Properties===
====6.2.1.1. Compatibility with Other Materials====

<ol>
<li>The material selected for air and vapour ''control layers'' must be compatible with any other materials in the ''waterproofing system'' or ''wall'' ''assembly'' to which the ''control layer'' may come in contact, including (without limitation) contact with primers and adhesives, substrates, solvents, and cleaners.
</li></ol>

====6.2.1.2. Permitted Materials for RoofStar Guarantee====
(See [[Notes to GLW Standard#A-6.2.1.2. | Note A-6.2.1.2.]])

<ol>
<li>While responsibility for the selection of suitable air and vapour ''control layers'' rests with the ''Design Authority'', a ''waterproofing system'' designed and built to qualify for a '''''RoofStar Guarantee''''' must satisfy the requirements in [[#6.2.1.3. Puncture Resistance and Thickness | Article 6.2.1.3.]]
</li></ol>

====6.2.1.3. Puncture Resistance and Thickness====

<ol>
<li>Air and vapour controls should be installed over a continuous smooth plane, regardless of a material's ability to span voids or spaces in the deck.
<li>Fully supported air and vapour ''control layers'' should possess a minimum published static puncture resistance rating of 150 N (34 lbf) (Ref. CGSB-37.56-M for both test method and standard limits) and be either self-adhering or torch-applied; a high puncture resistance is necessary for the membrane to withstand accidental damage during construction.
<li>Where no ''deck'' overlay board is installed and the air and vapour ''control layers'' are partially unsupported (for example, on a steel ''deck''), the ''control layers'' must possess a published static puncture resistance of at least 400 N (90 lbf).
<li>Should the air or vapour ''control layers'' be used as a temporary roof during ''project'' construction by either the ''Contractor'' or by other trades, a minimum 2 mm thick bituminous membrane is recommended.
</li></ol>

====6.2.1.4. Self-adhered and Torch-applied Materials====

<ol>
<li>Self-adhering or adhesive-applied materials should be considered as alternatives to torch-applied membranes when the substrate to which they will be applied is combustible, or when nearby structures, openings or materials present a fire hazard.
<li>A suitable separation or overlay material may be used as protection from open flame is acceptable; the application of materials to a combustible surface, using a torch, is strictly prohibited.
</li></ol>

====6.2.1.5. Reserved====

==Section 6.3. Application==
===6.3.1. Guarantee Term Requirements===
====6.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====6.3.1.2. Reserved====

===6.3.2. All Systems===
====6.3.2.1. Continuity and Support====

<ol>
<li>The ''Contractor'' must
<ol>
<li>ensure that air and vapour ''control layers'' that form part of ''wall'' assemblies and tie into the ''waterproofing assembly'' are installed to provide at least 101.6 mm (4”) of overlap, for ''continuity'' of matching layers in adjacent assemblies,
<li>ensure that air and vapour ''control layers'' are sealed to penetrations and drains that pass through or enter the ''waterproofing assembly'', and
<li>seal all ''control layers'' to matching layers in adjacent assemblies (i.e., ''walls'').
</li></ol>
<li>Installation of all air and vapour control materials must be smooth and uniform, without wrinkles or fish-mouths, and must also conform to the manufacturer’s published requirements and the ''Design Authority’s'' design details.
<li>All air and vapour control membrane side and end laps must be fully supported, in the field and at transitions with curbs, ''parapets'', ''walls'', and penetrations.
<li>''Drains'', ''overflow drains'', ''scupper drains'', and penetrations must be detailed where they intersect an air, vapour, or water ''control layer'', to provide ''continuity''.
</ol></li>

====6.3.2.2. Torch-applied Materials====

<ol>
<li>The application of materials to unprotected combustible materials, using a torch, is strictly prohibited.
<li>All combustible materials MUST be protected from open flame by an acceptable separation or overlay material; this includes, without limitation, combustible materials
<ol>
<li>on ''decks'', ''walls'', blocking, and canted edges, and
<li>that are hidden or obscured within voids, cracks, or orifices.
</li></ol>
<li>When a torch-applied membrane is specified over or adjacent to combustible materials, all joints between overlay panels, and at ''waterproofing system''-''wall'' transitions, must be sealed with the primary membrane ''manufacturer’s'' approved self-adhered membrane or tapes.
<li>Where torch-applied membranes are not permitted or desirable, the installation of bituminous air and vapour ''control layers'' should align with the approaches described and required in the "Standard for SBS-modified Bitumen Membrane Roof Systems", [[SBS_Roof_Systems_Standard#10.3.8. Alternative Approaches to Sheet Membrane Flashing | Subsection 10.3.8., "Alternative Approaches to Sheet Membrane Flashing"]].
</li></ol>

====6.3.2.3. Securement on Slopes====

<ol>
<li>Self-adhered membranes applied to slopes greater than 1:6 (2” in 12”) should be additionally secured with mechanical fasteners in locations where slippage may occur, to counter-act material displacement resulting from temperatures that exceed the membrane’s service temperature.
</li></ol>

====6.3.2.4. Reserved====

<hr>

<div id=PART_7></div>

=Part 7 - Insulation=
==Section 7.1. Design==
===7.1.1. General===
====7.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====7.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Heat-resistant insulation'' means insulation that resists heat and will not physically or chemically change when exposed to heat greater than 70°C (158°F), including heat from liquefied bitumen. Insulation boards of this type include fibreboard, polyisocyanurate, and mineral fibre ("wool"). Note that "heat-resistant" does not mean or even infer 'fire-proof'. While some heat-resistant insulation materials will resist burning for a time, only mineral fibre insulation will not burn.
<li>''Heat-sensitive insulation'' means insulation that may be physically or chemically altered when exposed to heat greater than 70°C (158°F) — for example, heat from a torch or from liquefied bitumen. Heat-sensitive insulation includes EPS, XPS and polyurethane.
</li></ol>
</li></ol>

===7.1.2. Guarantee Term Requirements===
====7.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====7.1.2.2. Reserved====

====7.1.2.3. Reserved====

===7.1.3. All Systems===
====7.1.3.1. Responsibility for Design====
(See [[Notes to GLW Standard#A-7.1.3.1.| Note A-7.1.3.1.]])

<ol>
<li>The ''Design Authority'' is responsible to ensure the design conforms to the Building Code and any other applicable requirements.
</li></ol>

====7.1.3.2. General Requirements====

<ol>
<li>Selected board insulation products may be used within the membrane ''waterproofing systems'', provided the panels are listed in [[Division_C | Division C]], and conform to the material specifications in [[#Section 7.2. Materials | Section 7.2.]]
</li></ol>

====7.1.3.3. Use of Existing Insulation====

<ol>
<li>Existing insulation in a ''waterproofing system'' may be reused (it will be excluded from coverage under the '''''Guarantee''''', which applies only to new materials), provided
<ol>
<li>the insulation is dry (most XPS insulation absorbs water vapour while in service),
<li>the ''Design Authority'' has specified its reuse, and
<li>the condition of the insulation is acceptable to the ''Design Authority'' as suitable to satisfy the requirements of the Building Code.
</li></ol>
</li></ol>

====7.1.3.4. Thermal Resistance and Layering====
(See [[Notes to GLW Standard#A-7.1.3.4.| Note A-7.1.3.4.]])

<ol>
<li>All insulated ''waterproofing systems'' with a cumulative thermal resistance greater than RSI-2.64 (R-15) (based on published LTTR values measured at 24°C) must be installed in multiple layers that are offset and staggered (See [[#Section 7.3. Application | Section 7.3., "Application"]]).
<li>In a multi-layered ''assembly'', any single layer of insulation in the field may have a thermal resistance greater than RSI-2.64 (R-15) provided no one layer exceeds 60% of the cumulative thermal resistance of the combined ''assembly'' of insulation, measured together with the thermal resistance of insulation overlay boards (See '''Figure 7.1.3.4.-A''').
<li>At intersections with insulated curbs and walls, insulation joints at the ''waterproofing system''-wall interface must be offset and staggered to minimize or eliminate thermal bridging (See '''Figure 7.3.2.2.-A)'''.
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 7.1.3.4.-A Effective Thermal Resistance and Layering''' Forming Part of Sentence 7.1.3.4.(2) (Click to expand illustration)
|-
| [[File:Figure 7.1.3.-A (XPS).jpg|link=https://rpm.rcabc.org/images/a/ae/Figure_7.1.3.-A_%28XPS%29.jpg | 600 px]]
|}

===7.1.4. Reserved===

===7.1.5. Reserved===

===7.1.6. Protected Waterproofing Systems===
(The requirements in [[#7.1.3. All Systems | Subsection 7.1.3., "All Systems"]], shall be read together with the following articles)

====7.1.6.1. Insulation Selection====

<ol>
<li>Only extruded polystyrene insulation (XPS) may be specified for a ''waterproofing system''.
</li></ol>

====7.1.6.2. Drainage Mats and Filter Fabric====

<ol>
<li>At least one drainage layer is required in a ''protected waterproofing system'', either above or below the XPS insulation, but
<ol>
<li>when openings for penetrations in ''walls'' or the ''deck'' provide less than 203.2 mm (8”) of clearance, the filtration layer must be water-permeable and the drainage layer shall be below the XPS insulation, to lower the ''drainage plane'' and minimize leaks into the building, and
<li>a drainage layer shall be specified above the XPS insulation when any ''overburden'' superimposed on the ''waterproofing system'' will result in a “vapour-closed” condition (i.e., landscaping, or an impermeable wearing course).
</li></ol>
<li>Filter fabric must be specified to cover XPS insulation, to
<ol>
<li>contain the insulation and thereby prevent ‘insulation stacking’ (displacement) when insulation boards become buoyant in water, and
<li>prevent fines from settling at the membrane level and filling the voids between insulation board joints.
</li></ol>
</li></ol>

==Section 7.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===7.2.1. Material Properties===
====7.2.1.1. General====

<ol>
<li>Only insulation boards accepted for use in the '''''RoofStar Guarantee Program''''', and acceptable to the membrane manufacturer, may be used to qualify for a '''''RoofStar Guarantee'''''.
</li></ol>

====7.2.1.2. Material Dimensions====

<ol>
<li>While minimal insulation panel thicknesses are permissible for some designs, some materials are by their nature breakable, and therefore the ''Design Authority'' should consider the constructability of the ''waterproofing system'' from a material handling perspective and consider specifying a thicker panel.
</li></ol>
</li></ol>

====7.2.1.3. Drainage Mats====

<ol>
<li>Drainage mats shall conform to the requirements in [[#14.2.1.4. Drainage and Water Retention Materials | Article 14.2.1.4.]]
</li></ol>

====7.2.1.4. Filter Fabric====

<ol>
<li>Filter fabrics shall conform to the requirements in [[#14.2.1.6. Filter Fabric | Article 14.2.1.6.]]
</li></ol>

===7.2.2. Suitability of Insulation===
====7.2.2.1. Extruded Polystyrene Insulation====

<ol>
<li>Extruded polystyrene insulation ("XPS") is ''heat-sensitive'' and
<ol>
<li>shall conform to CAN/CGSB-51.20-M87, "Thermal Insulation, Polystyrene, Boards and Pipe Covering", for Type 4 insulation, and to ASTM C578, "Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation", and
<li>is the only insulation that may be specified and installed in a ''waterproofing system''.
</li></ol>
</li></ol>

==Section 7.3. Application==
===7.3.1. Guarantee Term Requirements===
====7.3.1.1. RoofStar 5-year and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====7.3.1.2. Reserved====

===7.3.2. All Systems===
====7.3.2.1. Procurement of Insulation====

<ol>
<li>All insulation, except insulation that may be specified for re-use (See [[#7.1.3.2. General Requirements | Article 7.1.3.2.]]), must be supplied and installed by the ''Contractor''.
</li></ol>

====7.3.2.2. Alignment, Sizing, and Support====

<ol>
<li>Insulation boards
<ol>
<li>must be clean and dry,
<li>must be firmly supported,
<li>should be square and should make firm, full contact with adjacent panels,
<li>must be installed with the appropriate grade of expanding spray foam applied to gaps greater than 6.35 mm (1/4”) (this requirement does not apply to extruded polystyrene (XPS) installed in a ''protected waterproofing system''), and
<li>shall not be soldiered and must be laterally offset at least 304.8 mm (12") in two directions, both for adjacent layers and for adjacent row; a minus offset tolerance of 50.8 mm (2") maximum is permissible (See '''Figure 7.3.2.2.-A''').
</li></ol>
<li>Offsets are not required for
<ol>
<li>sloped insulation boards that are generally installed soldiered fashion to adjacent rows, and
<li>the first layer of overlay board, installed on top of heat-sensitive insulation, which may be soldiered to facilitate joint taping.
</li></ol>
 
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 7.3.2.2.-A Offset and Staggered Layering in Field''' Forming Part of Clause 7.3.2.2.(1)(4) (Click to expand illustration)
|-
| [[File:Figure 7.3.2.-A (XPS).jpg|link=https://rpm.rcabc.org/images/1/15/Figure_7.3.2.-A_%28XPS%29.jpg | 500 px]]
|}
 
<li>On exterior insulated walls, insulation joints at the waterproofing system-wall interface must be offset and staggered to eliminate thermal bridging (See '''Figure 7.3.2.2.-B''').
 
 
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 7.3.2.2.-B Offset and Staggered Layering at Wall''' Forming Part of Clause 7.3.2.2.(3) (Click to expand illustration)
|-
| [[File:Figure 7.3.2.2.-B (Hot Rubber).png|link=https://rpm.rcabc.org/images/3/30/Figure_7.3.2.2.-B_%28Hot_Rubber%29.png| 500 px]]
|}
</li></ol>

====7.3.2.3. Insulation Securement====

<ol>
<li>Insulation securement shall conform to the specified design for the ''waterproofing assembly'', calculated to resist flotation and (when applicable) ''specified wind loads''.
</li></ol>

====7.3.2.4. Reserved====

===7.3.3. Reserved===

===7.3.4. Reserved===
===7.3.5. Protected Waterproofing Systems===
(The requirements in [[#7.3.2. All Systems | Subsection 7.3.2., "All Systems"]], shall be read together with the following articles)

====7.3.5.1. Sequencing of Work====

<ol>
<li>Insulation installed against ''walls'' or ''curbs'' must be separated from waterproofing membranes with a non-bonding drainage mat or slip sheet.
<li>Insulation must be secured and protected immediately after installation.
</li></ol>

====7.3.5.2. Drainage Mats====
(See also [[#Part 11 - Drainage | Part 11, "Drainage"]])

<ol>
<li>At least one drainage layer is required in a ''waterproofing system'' and its location within the system shall conform to the design requirements in [[#7.1.6.2. Drainage Mats and Filter Fabric| Sentence 7.1.6.2.(1)]].
<li>A drainage mat must be installed below the XPS insulation.
<li>A second drainage layer may be installed above the insulation but is at the discretion of the ''Design Authority''.
<li>If a second drainage layer is specified, a vertical separation space measuring at least 12.7 mm (1/2″) must be preserved between the drainage layer and any ballast or overburden, to permit airflow and to assist in leveling.
<li>Specialized proprietary drainage products must be acceptable to the membrane ''manufacturer''.
<li>Ballast guards must be installed around all roof drains.
</li></ol>

====7.3.5.3. Filter Fabric====

<ol>
<li>Fabric filter mats must be
<ol>
<li>installed loose-laid (un-bonded) over the insulation and below any type of ballast or ''waterproofing system'' covering,
<li>overlapped at all edges a minimum of 304.8 mm (12”),
<li>at least 2438.4 mm x 2438.4 mm (96" x 96") in size, and
<li>slit to fit over roof penetrations or cut out around ''drains'' and other openings.
</li></ol>
<li>Filter fabric must extend up perimeter edges and ''curbs'' and must be placed loose (unattached) under metal counter flashings or wall finishes.
<li>When the filtration layer is part of a ''vegetated roof assembly'', the filtration layer shall conform to [https://rpm.rcabc.org/index.php?title=VRA_Standard#10.3.2.7._Installation_of_Void_Fill_and_Filtration_Layers Article 10.3.2.7.] of the “RGC Standard for Vegetated Roofs”.
</li></ol>

<hr>
<div id=PART_8></div>

=Part 8 - Reserved=

<hr>
<div id=PART_9></div>

=Part 9 - Membrane System Field=
==Section 9.1. Design==
===9.1.1. General===
====9.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====9.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Manufacturer'' means the manufacturer of the primary waterproofing material, unless stated otherwise.
<li>''Parallel to Slope'' means the direction parallel to the angle of a sloped plane.
</li></ol>
</li></ol>

===9.1.2. Guarantee Term Requirements===
====9.1.2.1. RoofStar 5-year Guarantee Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in Part 9 of the relevant RGC Standard for Waterproofing Roofs (See [[#9.1.3.1. General Requirements | Article 9.1.3.1.]] in this Standard)..
</li></ol>

====9.1.2.2. Reserved====

====9.1.2.3. Reserved====

===9.1.3. All Systems===
====9.1.3.1. General Requirements====

<ol>
<li>Only waterproofing membrane systems that are fully adhered and have an accepted protection layer installed above the membrane (protected) qualifies for coverage under the '''''RoofStar Guarantee Program'''''.
<li>All ''waterproofing system'' accessory components must be supplied or be accepted for use by the membrane ''manufacturer''.
<li>All materials must be protected from weather by properly stacking above ground or Deck surfaces and keep in factory packaging or other adequate covering until applied
</li></ol>

====9.1.3.2. Requirements for SBS-modified Bituminous Membrane Systems====

<ol>
<li>The field application of SBS-modified bituminous membrane ''waterproofing systems'' on structural ''decks'' at grade shall conform to the requirements in Part 9 of the [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard RGC Standard for SBS-modified Bitumen Membrane Roofs], published in [[Division B | Division B]] of this ''Manual''.
<li>Fully adhered membranes means membranes that are torch-applied, self-adhered, hot-mopped, or adhesive-applied; no other applications are permissible in ''waterproofing assemblies''.
</li></ol>

====9.1.3.3. Requirements for Hot Fluid-applied Rubberized Asphalt Systems====

<ol>
<li>The field application of hot fluid-applied rubberized asphalt ''waterproofing systems'' on structural ''decks'' at grade shall conform to the requirements in Part 9 of the [https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs], published in [[Division B | Division B]] of this ''Manual''.
</li></ol>

====9.1.3.4. Control Joints (Area Dividers)====

<ol>
<li>When ''control joints'' (system dividers) are recommended or required by the ''manufacturer'', or are deemed necessary by the ''Design Authority'', they must be designed following the requirements in [[#10.1.6.2. Control Joints (Area Dividers) | Article 10.1.6.2.]]
</li></ol>

====9.1.3.5. Securement====

<ol>
<li>''Waterproofing assemblies'' that are exposed to wind loads must be secured to resist displacement by ''specified wind loads'', and therefore the requirements in this Article shall be read together with the requirements in [[#Part 3 - Securing the Waterproofing Assembly | Part 3]] of this Standard.
</li></ol>

====9.1.3.6. Membrane Protection====

<ol>
<li>The design must specify immediate protection of a newly installed, fully reinforced membrane, using materials specified or deemed suitable by the ''manufacturer''.
<li>Installed membranes must be protected with materials conforming to the requirements in [[#9.2.1.3. Protection Materials | Article 9.2.1.3.]], using methods conforming to the requirements in [[#9.3.2.7. Protection of Membranes | Article 9.3.2.7.]]
<li>Installed membranes must be protected from damage caused by
<ol>
<li>any walkway surface,
<li>work performed concurrently or subsequently by other trades (the ''Design Authority'' is strongly urged to direct the work of other trades through specific, explicit directives in the design specifications), and
<li>chemicals or other contaminants that may adversely impact the waterproofing membrane or other ''system'' components, including (without limitation)
<ol>
<li>animal or vegetable grease,
<li>hot pipes (release valves),
<li>petroleum products or bi-products, and
<li>miscellaneous fluids from equipment (See also [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6.]] for application of reinforced liquid membrane flashing around roof penetrations).
</li></ol>
</li></ol>
<li>Membranes should be protected from
<ol>
<li>pool or garden chemicals and fertilizers,
<li>pet urine,
<li>bird excrement, and
<li>refrigerants.
</li></ol>
</li></ol>
</li></ol>

====9.1.3.5. Walkways====

<ol>
<li>The membrane must be suitably protected from mechanical damage by walkway surfaces.
<li>Paver walkway surfaces must be suitably supported in keeping with [[#14.1.3.11. Wearing Surfaces | Article 14.1.3.11.]] and [[#14.3.2.5. Wearing Surfaces | Article 14.3.2.5., "Wearing Surfaces"]].
</li></ol>

===9.1.4. Reserved===

===9.1.5. Uninsulated Systems===
(The requirements in [[#9.1.3. All Systems | Subsection 9.1.3., "All Systems"]], shall be read together with the following articles)

====9.1.5.1. General Requirements====

<ol>
<li>The installed membrane must be immediately protected with materials specified or deemed suitable by the ''manufacturer''.
</li></ol>

===9.1.6. Protected Systems===
(The requirements in [[#9.1.3. All Systems | Subsection 9.1.3., "All Systems"]], shall be read together with the following articles)

====9.1.6.1. General Requirements====

<ol>
<li>Ballasted systems shall conform to the requirements in [[#3.3.5.1. Ballasted Systems | Article 3.3.5.1.]] of the related ''waterproofing roof'' Standard, and in [[#9.1.3.3. Securement | Article 9.1.3.3.]] of this Standard.
</li></ol>

==Section 9.2. Materials==
(See [[Division_C | Division C]])

===9.2.1. Material Properties===
====9.2.1.1. Membrane Composition, Thickness, and Selection====

<ol>
<li>In addition to the minimum membrane thickness requirements in Sub-section 9.1.3., membranes shall conform to the requirements in Article 9.2.1.1. of the published RGC Standard for the specific membrane:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
</li></ol>

====9.2.1.2. Reserved====

====9.2.1.3. Protection Materials====

<ol>
<li>Membrane protection materials shall be compatible with the primary membrane, resist puncturing, and (except for ‘hot rubber’) resist bonding with the membrane.
<li>Materials used to protect an SBS-modified bituminous membrane must be
<ol>
<li>an RGC-accepted asphaltic core board measuring at least 4.76 mm (3/16”) thick,
<li>an RGC-accepted cap sheet at least 4.0 mm thick, or
<li>a protection mat acceptable to the membrane ''manufacturer''.
</ol></li>
<li>Materials used to protect a hot fluid-applied rubberized asphalt membrane must be acceptable to and specified by the ''manufacturer'' and shall be either
<ol>
<li>an RGC-accepted asphaltic core board measuring at least 4.76 mm (3/16”) thick, conforming to CSA-A123.25, or
<li>SBS-modified bituminous sheet membranes which shall be
<ol>
<li>reinforced with a non-woven polyester scrim no less than 180g/m2, or with a composite scrim of equal puncture resistance,
<li>no less than 2.0 mm (80 mils) thick, when measured in the middle of the membrane sheet, and
<li>sanded on the underside.
</ol></li>
</ol></li>
<li>Filtration fabrics shall conform to the requirements in [[#7.2.1.4. Filter Fabric | Article 7.2.1.4.]]
</ol></li>

===9.2.2. Materials Storage and Handling===
====9.2.2.1. Protection from the Weather====

<ol>
<li>All uninstalled materials must be protected from weather by properly stacking them above ground, or above the ''waterproofing system'' surface, in or beneath covers that are weather-resistant and secured against displacement by wind (See also [[#4.2.1.1. Use of Accepted Materials | Article 4.2.1.1. Use of Accepted Materials]]).
</ol></li>

===9.2.3. Accessories===
====9.2.3.1. Accessories Supplied by Membrane Manufacturer====

<ol>
<li>All membrane accessory components must be supplied by and acceptable to the ''manufacturer'', as stipulated in [[#9.1.3.1. General Requirements for All Systems | Article 9.1.3.1.]]
</ol></li>

==Section 9.3. Application==
===9.3.1. Guarantee Term Requirements===
====9.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====9.3.1.2. Reserved====

===9.3.2. All Systems===
====9.3.2.1. Preparation of Substrate====

<ol>
<li>All supporting Decks must be acceptable to the manufacturer and must be prepared according to the requirements published in the applicable RGC Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.3.2.1._Preparation_of_Substrate Article 9.3.2.1.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.3.2.1._Preparation_of_Substrate Article 9.3.2.1.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>In addition to the above, the following requirements apply:
<ol>
<li>Pitted, honey-combed surfaces, or surfaces with a Concrete Surface Profile (CSP) greater than 5 must be repaired by others before the membrane application, following acceptable repair practices (e.g., International Concrete Repair Institute technical guidelines, including “210.4R-2021 (PDF) - Guide for Nondestructive Evaluation Methods for Condition Assessment, Repair, and Performance Monitoring of Concrete Structures”).
<li>Concrete ''decks'', ''walls'', ''curbs'' and equipment pads are not to receive adhered waterproofing for a minimum of 28 days after pouring unless expressly instructed in writing by the Project Structural Engineer; ''decks'' formed with shot-crete and lightweight insulating concrete are not acceptable substrates for waterproofing under the RoofStar Guarantee Program (See [[#2.1.5.2. Concrete Decks | Article 2.1.5.2.]]).
<li>The moisture content levels of concrete surfaces, Decks, walls, curbs and equipment pad surfaces, must strictly comply with the membrane manufacturer’s published moisture level application limitations.
<li>All concrete surfaces to receive adhered waterproofing shall be structurally sound, water cured, finished to a Concrete Surface Profile (CSP) from 3 to 5, have a light hair broom finish or be prepared by mechanical means and shall be primed, when applicable, with a membrane ''manufacturer’s'' approved primer (See [[Notes to GLW Standard#A-9.3.2.2.(2) | Note A-9.3.2.2. (2))]].
<li>''Curbs'', blocking, and nailing strips should be installed where required prior to the waterproofing ''Contractor's'' acceptance of the ''deck''.
<li>Pre-cast panels, post-stressed beams, or “T” and cavity ''decks'' shall have a minimum 50mm (2”) concrete topping applied over the ''deck'' prior to the application of the waterproofing membranes.
<li>Where a difference exists in the levels of adjacent surfaces, the general contractor or others shall install approved non-shrink grout or ground to match level of adjacent surfaces.
<li>Grouting or grinding shall be feathered on the lower surface a minimum distance of twelve times the amount of the vertical differential.
</li></ol>
</li></ol>

====9.3.2.2. Preparation of Waterproofing System Materials====

<ol>
<li>SBS membranes must be unrolled, prepared, and conditioned for installation, as required by the manufacturer.
<li>Product cakes of rubberized asphalt must be
<ol>
<li>heated in a double-jacketed oil bath or hot-air melter to a temperature specified by the ''manufacturer'', and shall not be heated beyond the specified maximum,
<li>maintained at a safe operating temperature, established by the ''manufacturer'', and
<li>continually agitated until installed; avoid heating and agitating the same material for more than six hours.
</li></ol>
</li></ol>

====9.3.2.3. General Requirements for Membrane Application====

<ol>
<li>Membranes shall be installed according to the general and specific requirements of Sub-section 9.3.2. in the applicable RGC Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.3.2._All_Systems Subsection 9.3.2.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.3.2.1._Preparation_of_Substrate Subsection 9.3.2.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
</li></ol>

====9.3.2.4. Cold and Inclement Weather Application====

<ol>
<li>SBS membrane installed during cold weather must follow the membrane ''manufacturer’s'' guidelines for storage and membrane conditioning.
<li>Hot fluid-applied rubberized asphalt shall conform to the following requirements, replicated here from [https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.3.2.4._Cold_and_Inclement_Weather_Application Article 9.3.2.4.] of "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs”
<ol>
<li>Installation during cold weather must follow the manufacturer’s guidelines for storage and membrane conditioning.
<li>When permitted by the ''manufacturer'', membranes may be applied in ambient air temperatures lower than -18⁰ C (0⁰ F), but application below -18⁰ C is not recommended.
<li>Membranes shall not be installed during inclement weather unless expressly permitted by the ''manufacturer'', in writing.
</li></ol>
</li></ol>

====9.3.2.5. Securement on Slopes====

<ol>
<li>''Waterproofing systems'' installed on slopes greater than 1:6 (2” in 12”) are permissible only with a written Variance from the '''''Guarantor'''''.
</li></ol>

====9.3.2.6. Reserved====

====9.3.2.7. Protection of Membranes====

<ol>
<li>Membranes shall be protected according to the general and specific requirements of Sub-section 9.3.2. in the applicable RGC Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.3.2._All_Systems Article 9.3.2.7.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.3.2.1._Preparation_of_Substrate Article 9.3.2.7.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>Membrane protection shall conform to the material requirements in [[#9.2.1.3. Protection Materials | Article 9.2.1.3.]] and shall be completely installed and secured
<ol>
<li>before any construction traffic is permitted on the ''project'' (this prohibition does not apply to workers of the waterproofing trade or moisture monitoring technicians), and
<li>before anyone other than the ''Contractor'' installs any ''overburden''.
</li></ol>
<li>Protection materials shall be installed with tightly fitting butt joints.
<li>Filtration materials shall be overlapped and secured behind linear metal flashings.
</li></ol>

====9.3.2.8. Transitions with Water-shedding Systems====

<ol>
<li>Where slopes less than 1:16 (3/4" in 12") intersect a ''water-shedding system'', the ''waterproofing system'' must be designed to extend up the ''water-shedding system'' slope as described in [[#10.3.7.2. Intersections with Water-Shedding Roofs | Article 10.3.7.2.]], using methods conforming to the general application requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]]
</li></ol>

====9.3.2.9. Walkways====

<ol>
<li>Any walkway pads or supports capable of absorbing solar radiation must be installed on a non-bonding slip sheet, to protect the membrane from damage by heat.
<li>When pavers are used as the walkway material, they must be
<ol>
<li>spaced no closer than 3.18 mm (1/8″),
<li>supported by non-abrasive pads or proprietary pedestals providing a minimum of 12.7 mm (1/2″) of vertical separation to permit adequate airflow and leveling (Slip sheets under pedestals may be necessary to prevent membrane abrasion), and
<li>secured against displacement by wind.
</li></ol>
</li></ol>

===9.3.3. Membrane Application Methods===
(The requirements in [[#9.3.2. All Systems | Subsection 9.3.2., "All Systems"]], shall be read together with the following article)

====9.3.3.1. Additional Requirements for SBS-modified Bituminous Membranes====

<ol>
<li>The application of the following membrane types shall follow the referenced requirements in the “RGC Standard for SBS-modified Bitumen Membrane Roofs”:
<ol>
<li>Self-adhered and Cold-processed membranes shall be installed to conform to the requirements of [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.3.3.1._Self-adhered_and_Cold-processed_Membranes Article 9.3.3.1.]
<li>Hot Asphalt-adhered membranes shall be installed to conform to the requirements of [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.3.3.3._Hot_Asphalt-adhered_Membranes Article 9.3.3.3.]
<li>Torch-applied membranes shall be installed to conform to the requirements of [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.3.3.4._Torch-applied_Membranes Article 9.3.3.4.]
<li>Liquid membrane systems accepted for field application as a second layer in a multi-ply SBS-modified bituminous membrane system shall be installed to conform to the requirements of [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.3.3.5._Liquid_Membranes_.28Field_Application.29 Article 9.3.3.5.]
</li></ol>
</li></ol>

===9.3.4. Reserved===

===9.3.5. Uninsulated Systems===
(The requirements in [[#9.3.2. All Systems | Subsection 9.3.2., "All Systems"]], shall be read together with the following articles)

====9.3.5.1. Reserved====

====9.3.5.2. Membranes Installed on Concrete====

<ol>
<li>Concrete ''decks'' shall be prepared as required in [[#9.3.2.1. Preparation of Substrate | Article 9.3.2.1.]], the application of the primary membrane shall conform to the general requirements in [[#9.3.2.3. General Requirements for Membrane Application | Article 9.3.2.3.]] and (for SBS-modified bituminous membranes) the specific requirements in [[#9.3.3.1. Additional Requirements for SBS-modified Bituminous Membranes | Article 9.3.3.1.]]
</li></ol>

====9.3.5.3. Reserved====

====9.3.5.4. Reserved====

====9.3.5.5. Reserved====

====9.3.5.6. Membrane Protection====
<ol>
<li>Installed membranes must be protected from damage as soon as possible after integrity testing (Refer to [[#9.3.2.7. Protection of Membranes | Article 9.3.2.7.]] for general requirements).
</li></ol>

===9.3.6. Protected Waterproofing Systems===
(The requirements in [[#9.3.2. All Systems | Subsection 9.3.2., "All Systems"]], shall be read together with the following articles)

====9.3.6.1. Reserved====

====9.3.6.2. Membrane Protection====

<ol>
<li>Installed membranes must be protected from damage as soon as possible after integrity testing (Refer to [[#9.3.2.7. Protection of Membranes | Article 9.3.2.7.]] for general requirements).
</ol></li>

====9.3.6.3. Procurement and Installation of Other Materials====

<ol>
<li>All components of a ''waterproofing system'', including the gravel or paver ballast, must be supplied and installed by the ''Contractor''.
</ol></li>

<hr>

<div id=PART_10></div>

=Part 10 - Perimeters and Walls=
==Section 10.1. Design==
===10.1.1. General===
====10.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====10.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===10.1.2. Guarantee Term Requirements===
====10.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====10.1.2.2. Reserved====

===10.1.3. All Systems===
====10.1.3.1. General Requirements====

<ol>
<li>The ''Design Authority'' is responsible to specify the connections between the ''waterproofing system'' and ''walls'' or other building components, particularly where the ''continuity'' of air, vapour and water-resistive ''control layers'' is critical or required by Code (See [[#Part 6 - Air and Vapour Controls | Part 6, "Air and Vapour Controls"]]).
<li>''Projects'' must follow proper sequencing; materials must positively integrate (“shingle fashion”) with other materials, ''systems'', or ''assemblies'', including those installed by other trades.
<li>''Wall'' surfaces must be suitable to receive waterproofing materials, or they must be covered with an accepted overlay panel material listed in [[Division_C | Division C]].
<li>Where the structural slab at grade and an adjoining ''wall'' are constructed of dissimilar materials (i.e., concrete ''deck'' joined to a steel wall), differing expansion and contraction rates for the two materials may adversely affect the ''waterproofing system'' and, in particular, the field and flashing membranes, and therefore it is incumbent upon the ''Design Authority'' to consult the ''manufacturer's'' literature and specify the correct materials for each particular ''deck-wall'' intersection.
</li></ol>

====10.1.3.2. Membrane Flashing====

<ol>
<li>All changes in plane in the ''waterproofing system'', and all intersections between the system field and edges, ''walls'', or ''parapets'', must be flashed using the means and methods described and required in Article 10.1.3.2. of the applicable RGC Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#10.1.3.2._Membrane_Flashing Article 10.1.3.2.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#10.1.3.2._Membrane_Flashing Article 10.1.3.2.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>No UV-sensitive membrane may be left exposed and must be fully protected with
<ol>
<li>the manufacturer’s proprietary protection material, or
<li>base metal flashings.
</li></ol>
<li>All other specifications shall follow the application requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]]
<li>Sheet membrane flashing must be self-adhered, adhered with adhesives, or with torch-applied heat, and shall conform to the requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]]
<li>Linear metal flashing, or a RoofStar-accepted, fleece-reinforced 2-component polymethyl methacrylate (PMMA) liquid membrane flashing, is required at all edges, upper membrane terminations, curb tops, and at the tops of ''parapets'', to protect sheet membrane flashing from damage.
<li>Linear metal flashing used for the termination of sheet membrane flashing plies shall be installed in keeping with [[#Article 13.1.3.3. Securement | Article 13.1.3.3. Securement]].
<li>Sheet membrane flashing must be protected from damage caused by foot traffic or shifting coverings, using base metal flashing or other methods acceptable to the '''''Guarantor'''''.
<li>Where a ''waterproofing assembly'' allows water to freely drain off the edge, and that assembly adjoins a ''wall'', a cricket or diverter should be installed at the ''deck'' edge to prevent water intrusion behind vulnerable wall finishes.
</li></ol>

===10.1.4. Perimeter Details, Walls, and Openings===
(The requirements in [[#10.1.3. All Systems | Subsection 10.1.3., "All Systems"]], shall be read together with the following Articles)

====10.1.4.1. Parapets====

<ol>
<li>While most ''waterproofing assemblies'' drain over the ''deck'' edge (See [[#10.1.4.2. Deck (Slab) Edge | Article 10.1.4.2.]]), when ''parapets'' are specified or required they may be waterproofed before a coping, its membrane, and metal coping (cap) flashing are installed, but the coping will be excluded from coverage unless the ''parapet'' membranes are carried onto and over the coping in accordance with the application requirements described in [[#10.3.4. Perimeter Details, Walls, and Opening | Subsection 10.3.4.]]
<li>On structural ''decks'' exposed to wind load, where ''overburden'' or ballast extends to the ''deck'' edge, ''parapets'' must be designed to retain the material against wind scouring, but in any event, they shall be no less than 203.2 mm (8”) in height when measured from the top of the ''finished system surface''.
<li>With the exception of Sentence (1), ''parapets'' are optional unless required by Code or the Authority Having Jurisdiction, but when a ''parapet'' is specified or otherwise required by this Standard, it must be no less than 127.0 mm (5") in height, measured from the ''finished system surface'' to the inside top edge of the ''parapet'' (this height requirement facilitates proper metal cap flashing securement) (Ref. [[#10.3.4. Perimeter Details, Walls, and Opening | Subsection 10.3.4.]]; also see [[#13.3.2.3. Cap Flashing, Counterflashing, and Reglet Flashing | Article 13.3.2.3. Cap Flashing, Counterflashing, and Reglet Flashing]]).
<li>A ''parapet'' ''wall'' measuring no less than 203.2 mm (8”) is required at the edge of the ''deck'' where the deck is not supported by an adjacent ''wall'', and an ''expansion joint'' ([[#10.1.6.1. Expansion Joints | Article 10.1.6.1.]]) shall join the two at the top of the parapet (See the Expansion Joint (Wall) construction detail).
<li>''Parapets'' with cavities must be designed with consideration for ventilation.
<li>All ''parapet'' copings that form part of the ''Contractor’s'' scope of work must provide solid support for metal coping (cap) flashings and shall be suitable to receive mechanical fasteners (Ref. [[#13.1.3.6. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.1.3.6.]]; also see [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]).
<li>When the width of any ''parapet'' exceeds 101.6 mm (4"), the coping (installed by other trades) must
<ol>
<li>slope toward the waterproofing side of the ''parapet'' ''wall'', and shall
<li>be sloped to meet the minimum requirements for metal coping (cap) flashing in '''Table 13.1.3.4.-A''', [[#13.1.3.4. Gauge, Dimension Limitations, and Seams | Article 13.1.3.4.]]
</li></ol>
<li>Membranes specified for ''parapets'' with a pre-cast or stone coping must be at least 2.5 mm thick and shall be manufactured with a sanded top surface.
</li></ol>

====10.1.4.2. Deck (Slab) Edges====

<ol>
<li>Where a ''waterproofing assembly'' ''deck'' terminates flush with the drainage plane, the ''waterproofing system'' must be designed to seal and waterproof the transitions between the horizontal ''deck'' and any vertical ''walls'' below grade.
</li></ol>

====10.1.4.3. Tall Parapets====

<ol>
<li>When a ''parapet'' higher than 609.6 mm (24") (a tall parapet) is specified as part of the ''Contractor’s'' scope of work,
<ol>
<li>membranes specified for the vertical surface of the ''wall'', above the primary waterproofing membrane flashing, must conform to the requirements in [[#10.2.1.1. Flashing Membranes | Article 10.2.1.1.]], and
<li>additional mechanical securement shall conform to the requirements in this Part, or to the requirements of the ''manufacturer'', whichever is greater.
</li></ol>
<li>All ''waterproofing system'' intersections with ''walls'' shall conform to the requirements in [[#10.1.3. All Systems | Subsection 10.1.3. All Systems]], and shall maintain continuity with the ''wall'' control layers for air, vapour, and water.
<li>''Tall parapets'' with cavities must be designed with consideration for ventilation.
</li></ol>

====10.1.4.4. Reserved====

====10.1.4.5. Doors, Windows, and Wall Openings====

<ol>
<li>Rough openings formed or framed in walls to accommodate doors, windows, curtain-wall assemblies, or other penetrations (i.e., ventilation grilles), should be oversized to allow for the build-up of ''waterproofing system'' flashing membrane.
<li>Low-clearance openings (rough openings less than 203.2 mm (8") in height, measured from the ''finished system surface'')
<ol>
<li>should be avoided, particularly when designing a ''waterproofing system'' to support any type of ''overburden'', and
<li>are not recommended because of their propensity to overflow (water overflowing through a low opening is not covered by a '''''RoofStar Guarantee''''').
</li></ol>
<li>When a low-clearance opening is unavoidable or specified (i.e., to comply with Code for level access and egress),
<ol>
<li>the ''deck'' must be sloped away from the opening,
<li>the rough opening shall not be less than 101.6 mm (4") above the ''drainage plane'' and must be waterproofed in keeping with the requirements in [[#10.3.4.5. Doors, Windows, and Wall Openings | Article 10.3.4.5.]],
<li>the ''drainage plane'' must be free of obstructions and materials capable of displacing water,
<li>the low-clearance opening should be protected by an overhang wherever practical, to minimize water intrusion that occurs from wind-driven rain or from snow accumulation, and
<li>the opening must be protected by an ''overflow drain'', if drainage over the ''deck'' edge is blocked by a ''parapet'',
<ol>
<li>situated on the same roof area as the low-clearance opening,
<li>located at least 25.4 mm (1") below the elevation of the rough opening, and
<li>conforming to the spacing and capacities required by the "National Plumbing Code of Canada", Division B, [https://nrc-publications.canada.ca/eng/view/ft/?id=6e7cabf5-d83e-4efd-9a1c-6515fc7cdc71#%5B%7B%22num%22%3A310%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C250%2Cnull%5D Article 2.4.10.4.] (See also [[#11.1.3.1. Principles of Design | Article 11.1.3.1., "Principles of Design"]]).
</li></ol>
</li></ol>
<li>When the building interior transitions to an accessible surface through a flush door opening,
<ol>
<li>the design shall conform to the requirements in this Part, and to [[#14.1.3.11. Wearing Surfaces | Article 14.1.3.11.]], and
<li>the membrane installed over the rough opening sill must be protected from abrasion damage as described in [[#10.3.4.5. Doors, Windows, and Wall Openings | Sentence 10.3.4.5.(6)]] below.
</li></ol>
</li></ol>

===10.1.5. Reserved===
===10.1.6. Expansion and Control Joints===
(The requirements in [[#10.1.3. All Systems | Subsection 10.1.3., "All Systems"]], shall be read together with the following Articles)

====10.1.6.1. Expansion Joints====
(See [[Notes to GLW Standard#A-10.1.6.1.| Note A-10.1.6.1.]])

<ol>
<li>The design and placement of structural ''expansion joints'' is the responsibility of the ''Design Authority'', but they must be considered wherever
<ol>
<li>expansion or contraction joints are provided in the structural assembly,
<li>differential movement between structural components may occur (i.e., where a ''wall'' and the ''deck'' are separately supported, or
<li>seismic movement is anticipated.
</li></ol>
<li>The location of ''expansion joints'' must be clearly indicated on the drawings, drawn in detail, and included in the specifications.
<li>Proprietary elastomeric ''expansion joint'' systems are covered under the '''''RoofStar Guarantee Program''''' as an accessory to the accepted primary material and (except where the condition of Sentence 10.1.4.1.(6) applies) may be used at the drainage plane provided the expansion joint system is
<ol>
<li>manufactured with an EPDM-based core and flanges that can be fully bonded to the primary membrane,
<li>accepted for use in the '''''RoofStar Guarantee Program''''',
<li>compatible with the waterproofing membrane and acceptable to the membrane ''manufacturer'',
<li>designed and manufactured to accommodate building movements of at least 500% elongation at -40° C (-40° F) across its length and at all vulcanized points,
<li>factory-fabricated by means of vulcanization,
<li>manufactured as one piece, complete with all joints, details and connections,
<li>bonded with the primary membrane in a manner acceptable to the manufacturers of both the expansion joint and the membrane to which it will be bonded, and
<li>protected from damage, including foot traffic.
</li></ol>
<li>Field splicing of proprietary elastomeric expansion joints is permitted only when made with a machine acceptable to the expansion joint manufacturer.
<li>Elastomeric expansion joint systems that are not proprietary to the membrane manufacturer are not covered by a '''''RoofStar Guarantee''''' and must be built as a raised structure with a minimum height of 203.2 mm (8"), measured from the ''finished system surface''.
</li></ol>

====10.1.6.2. Control Joints (System Dividers)====
(See [[Notes to GLW Standard#A-10.1.6.2. | Note A-10.1.6.2.]]; also see [[#10.3.6.2. Control Joints (System Dividers) | Article 10.3.6.2.]])

<ol>
<li>The ''Design Authority'' is responsible
<ol>
<li>to determine the need for ''control joints'' (system dividers), and
<li>to specify their location and design.
</li></ol>
<li>The ''Design Authority'' must consider specifying ''control joints''
<ol>
<li>when a single system area exceed 61 m (approx. 200’) in length and the membrane is limited in its flexibility (consult the manufacturer for their recommendations),
<li>for buildings in climate zones with significant seasonal temperature swings,
<li>where an addition joins an existing building,
<li>where the ''deck'' type changes (i.e., steel transitions to wood),
<li>where insulation in the ''waterproofing system'' changes thickness,
<li>where the ''deck'' changes in elevation, and
<li>when interior heating conditions change.
</li></ol>
<li>Specified and detailed ''control joints'' should be located at the high points of the assembly, so that water drains away from both sides of the divider and is not impeded by it.
<li>''Control joints'' must be
<ol>
<li>constructed as a raised divider,
<li>sloped on the top face (this may be bi-directional, or only toward one side),
<li>enveloped with no fewer than two plies of sheet membrane flashing,
<li>at least 127 mm (5”) in height, measured from the ''finished system surface'', when covered with a metal cap flashing (this minimum may be reduced to 101.4 mm (4”) when the metal cap flashing is omitted), and
<li>waterproofed in keeping the requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]], together with the ''manufacturer’s'' published specifications for the detail.
</li></ol>
<li>Unless otherwise approved by the '''''Guarantor''''', ''control joints'' may be specified to divide a new ''system'' (addition) from existing ''systems'' (Ref. [[#1.1.4.5. Tie-ins, Additions, and Alterations to Existing Roofing | Article 1.1.4.5.]]).
</li></ol>

===10.1.7. Intersections with Other Systems===
(The requirements in [[#10.1.3. All Systems | Subsection 10.1.3., "All Systems"]], shall be read together with the following Articles)

====10.1.7.1. Intersections with Water-shedding Systems====

<ol>
<li>Intersections with ''water-shedding systems'' must be designed according to the requirements in [[#10.3.7.2. Intersections with Water-Shedding Roofs | Article 10.3.7.2.]]
</li></ol>

====10.1.7.2. Reserved====

===10.1.8. Alternative Approaches for Membrane Flashing===
(The requirements in [[#10.1.3. All Systems | Subsection 10.1.3., "All Systems"]], shall be read together with the following Articles)

====10.1.8.1. Specifying Hazard-reduction Strategies====

<ol>
<li>The ''Design Authority'' should consider alternatives to heat-applied materials when the application process involves Hot Work (Ref. [[#1.1.3.5. Hot Works | Article 1.1.3.5.]]) and the substrate to which they will be applied is combustible, or when nearby structures, openings, or materials, present a fire hazard; in the alternative, choose a suitable separation or overlay material as protection from open flame.
<li>Self-adhering or adhesive-applied membranes as alternatives to heat-applied membranes are acceptable to the '''''Guarantor''''' and must also be acceptable to the ''manufacturer''.
<li>The application of materials to a combustible surface, using a torch, is strictly prohibited (Refer to [[#10.3.8. Alternative Approaches to Sheet Membrane Flashing | Sub-section 10.3.8., "Alternative Approaches to Sheet Membrane Flashing"]], for application requirements).
</li></ol>

==Section 10.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===10.2.1. Material Properties===
====10.2.1.1. Flashing Membranes====

<ol>
<li>Sheet membranes used to flash the intersection of the system field and perimeter ''walls'' must conform to the membrane requirements found in [[#9.2.1.1. Membrane Composition, Thickness, and Selection | Article 9.2.1.1.]] of the related ''waterproofing roof'' Standard.
<li>When waterproofing a ''tall parapet'' above the primary membrane system is specified as part of the ''Contractor's'' scope of work (Ref. [[#10.1.4.3. Tall Parapets | Article 10.1.4.3.]] and [[#10.3.4.3. Tall Parapets | Article 10.3.4.3.]]), the membrane shall
<ol>
<li>be compatible with the primary membrane,
<li>be self-adhering,
<li>be declared suitable for the application by the ''manufacturer'' (see [[Notes to GLW Standard#A-10.2.1.1.(2)(3) | Note A-10.2.1.1.(2)(3)]]),
<li>possess properties consistent with the design and characteristics of the ''wall'' assembly,
<li>possess a high softening point and a minimum flow temperature of 87.7°C (190°F) (ASTM D5147, "Standard Test Methods for Sampling and Testing Modified Bituminous Sheet Material") and
<li>have a thickness no less than 1 mm (.040”).
</li></ol>
<li>Some membranes may be susceptible to damage from bird droppings, pet urine, and chemical contamination (oils, solvents, or any discharge from a mechanical unit), and therefore they should be protected using measures designed in consultation with the ''manufacturer''.
<li>Fleece-reinforced liquid membrane flashing systems must be accepted by the '''''Guarantor''''' and proprietary to, or accepted by, the ''manufacturer''.
</li></ol>

====10.2.1.2. Linear Metal Flashing====

<ol>
<li>''Linear metal flashing'' incorporated into perimeters and ''walls'' of the ''waterproofing system'' must conform to the materials and fabrication requirements in [[#Part 13 - Linear Metal Flashing | Part 13, "Linear Metal Flashing"]].
</li></ol>

====10.2.1.3. Reserved====
====10.2.1.4. Sealants====

<ol>
<li>Sealants applied to ''linear metal flashing'', where sheet membrane flashing is terminated, shall conform to the requirements in [[#13.2.1.4. Sealants | Article 13.2.1.4.]]
</li></ol>

===10.2.2. Securement Materials===
====10.2.2.1. Fasteners====

<ol>
<li>Where fasteners are used in the waterproofing system''
<ol>
<li>to secure waterproofing materials, they shall conform to the requirements in [[#3.2.2.1. Fasteners | Article 3.2.2.1.]] of the related ''waterproofing roof'' Standard.
<li>to secure ''linear metal flashings'', they shall conform to the requirements in [[#13.2.1.4. Sealants | Article 13.2.1.4.]]
</li></ol>
</li></ol>

==Section 10.3. Application==
===10.3.1. Guarantee Term Requirements===
====10.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====10.3.1.2. Reserved====

===10.3.2. All Systems===
====10.3.2.1. Substrate Preparation====

<ol>
<li>All wall surfaces to which waterproofing materials must be installed (including Concrete Masonry Unit (CMU)) shall be
<ol>
<li>prepared in like manner to the ''deck'' (Ref. [[#9.3.2.1. Preparation of Substrate | Article 9.3.2.1.]]) and declared suitable by the ''manufacturer'', or
<li>covered with a RoofStar-accepted overlay panel conforming to the material requirements in [[#5.2.1.3. Overlays for Walls | Article 5.2.1.3.]] and installed to conform to [[#5.3.2.5. Support, Arrangement, and Securement of Wall Overlays | Article 5.3.2.5.]]
</li></ol>
<li>Wherever the primary membrane will be applied, gaps or cracks that exceed 1.59 mm (1/16”) in width must be reinforced prior to the application of the membrane using the ''manufacturer’s'' proprietary reinforcement material.
</li></ol>

====10.3.2.2. Material Preparation====

<ol>
<li>Membranes preparation shall conform to the general and specific requirements of Article 10.3.2.2. in the applicable RGC Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#10.3.2.2._Material_Preparation Article 10.3.2.2.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#10.3.2.2._Material_Preparation Article 10.3.2.2.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>SBS-modified bitumen membrane flashing shall be prepared following the requirements in the "RGC Standard for SBS-modified Bitumen Membrane Roofs".
</li></ol>

====10.3.2.3. General Application Requirements for Perimeters and Walls====

<ol>
<li>The general application requirements for perimeters and walls shall conform to the general and specific requirements of Article 10.3.2.3. in the applicable RGC Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#10.3.2.3._General_Application_Requirements_for_Perimeters_and_Walls Article 10.3.2.3.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#10.3.2.3._General_Application_Requirements_for_Perimeters_and_Walls Article 10.3.2.3.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>Cold joints between concrete pours, at transitions between horizontal ''decks'' and vertical ''walls'' below grade, shall be sealed and covered with waterproofing membrane flashing that is
<ol>
<li>compatible with any foundation or ''wall'' waterproofing or damp proofing, and
<li>extends at least 203.2 mm (8”) past any joints between the ''deck'' and a ''wall''.
</li></ol>
<li>Whenever materials at ''deck'' and below grade ''wall'' transitions are not compatible with one another, sealants and mechanically attached termination bars are acceptable, to create a watertight lap a minimum 203.2 mm (8") in width.
<li>When damp proofing of below-grade ''walls'' is completed before waterproofing of the structural slab at grade, or the backfill against blind-side waterproofing prevents a below-grade seal by the ''Contractor'', a waterproofing membrane-compatible membrane should be installed by the damp proofing contractor and extended onto the horizontal plane of the slab, to permit a positively draining, watertight seal.
</li></ol>
</li></ol>

====10.3.2.4. Protection of Membranes====

<ol>
<li>All installed membranes must be protected from splashed or dripped primer (applicable to all trades).
<li>Membrane flashing must be protected from damage caused by UV radiation, foot traffic, or shifting coverings, using a ''linear metal flashing'' (i.e., base flashing) or other methods acceptable to the '''''Guarantor'''''.
<li>Protection materials shall be installed as required in [[#9.3.2.7. Protection of Membranes | Article 9.3.2.7.]]
<li>When an integrity scan is not required because the conditions in [[#1.1.3.3. Membrane Integrity Testing | Article 1.1.3.3.]] have been satisfied, the ''Contractor'' shall nevertheless protect installed field membranes and membrane flashing, immediately after installation, with RoofStar-accepted membrane protection materials.
</li></ol>

===10.3.3. Additional Requirements for Membrane Flashing===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.3.1. Membrane Flashing for SBS-modified Bituminous Sheet Membranes====

<ol>
<li>The application of permitted SBS-modified bituminous sheet membrane flashing shall conform to the general and specific requirements of Subsection 10.3.3. in the applicable RGC Standard for roofs, and shall be read together with Subsection 10.3.2. in the same Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#10.3.3._Additional_Requirements_for_Membrane_Flashing Subsection 10.3.3.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#10.3.3._Additional_Requirements_for_Membrane_Flashing Subsection 10.3.3.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
</li></ol>

===10.3.4. Perimeter Details, Walls, and Openings===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.4.1. Additional Requirements for Parapets, Walls, and Openings in Walls====

<ol>
<li>The additional application requirements for waterproofing materials at the perimeter, on walls, and at openings in walls, shall conform to the general and specific requirements in Articles 10.3.4.1., 10.3.4.3, and 10.3.4.5. of Subsection 10.3.4. in the applicable RGC Standard for roofs and shall be read together with Subsection 10.3.2. in the same Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#10.3.4._Perimeter_Details.2C_High_Walls.2C_and_Openings Subsection 10.3.4.] in the RGC Standard for SBS-modified Bituminous Membrane Roofs.
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#10.3.4._Perimeter_Details.2C_High_Walls.2C_and_Openings Subsection 10.3.4.] in the RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs.
</li></ol>
</li></ol>

===10.3.5. Reserved===
===10.3.6. Expansion and Control Joints===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.6.1. Expansion Joints====
(See [[#10.1.6.1. Expansion Joints | Article 10.1.6.1.]])

<ol>
<li>When proprietary elastomeric ''expansion joint'' systems in the ''drainage plane'' are specified, the bond between the sheet membrane flashing and the ''expansion joint'' system must be acceptable to both the ''manufacturer'' and the supplier of the expansion joint system (Ref. [[#10.1.6.1. Expansion Joints | Article 10.1.6.1.]] for design requirements).
<li>Backer rods, insulation, or any other materials installed inside the cavity below the expansion joint may be installed by the ''Contractor'' but are not considered part of the system and therefore are excluded from coverage under a '''''RoofStar Guarantee'''''.
<li>Field splicing of proprietary elastomeric ''expansion joints'' is permissible only when made with a machine acceptable to the expansion joint manufacturer.

</li></ol>

====10.3.6.2. Control Joints (Roof Dividers)====

<ol>
<li>''Control joints'' must be waterproofed in keeping the requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]], together with the ''manufacturer’s'' published specifications for the detail.
</li></ol>

===10.3.7. Intersections with Other Systems===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.7.1. Compatibility of Materials====

<ol>
<li>Where a ''waterproofing system'' intersects with a different system, materials must be
<ol>
<li>compatible with each other, or
<li>must be separated from contact by an intermediate separation layer.
</li></ol>
</li></ol>

====10.3.7.2. Intersections with Water-Shedding Systems====
(See [[Notes to GLW Standard#A-10.3.7.2. | Note A-10.3.7.2.]])

<ol>
<li>When a ''waterproofing system'' transitions up a slope and underlaps a ''water-shedding system'',
<ol>
<li>sheet membrane flashing must extend up the ''water-shedding roof system'' slope at least
<ol>
<li>152.4 mm (6”), plus at least 76.2 mm (3”) for the overlap by the ''water-shedding system'', when measured vertically from the maximum water level, and
<li>304.8 mm (12”) plus at least 76.2 mm (3”) for the overlap by the ''water-shedding system'', when measured vertically from the maximum water level, in regions with typical heavy snow,
</li></ol>
<li>the termination of the ''waterproofing system'' sheet membrane flashing on the slope must be mechanically secured, separately from the ''water-shedding system'', and
<li>the overlapping adjoining system materials must conform to the requirements for the specific ''water-shedding system''.
</li></ol>
</li></ol>
</li></ol>

====10.3.7.3. Reserved====

===10.3.8. Alternative Approaches to Sheet Membrane Flashing===

====10.3.8.1. General====

<ol>
<li>When field membranes or flashing plies are heat-welded, or when construction sequencing requires strategies for mitigating fire risk, the ''Contractor'' is responsible to assess risks and should consider the means and methods in [[#10.3.8. Alternative Approaches to Sheet Membrane Flashing | Subsection 10.3.8.]] of the "RGC Standard for SBS-modified Bitumen Membrane Roofs.":
</li></ol>

<hr>

<div id=PART_11></div>

=Part 11 - Drainage=
<div id="DRAIN_DESIGN"></div>
==Section 11.1. Design==
===11.1.1. General===
====11.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====11.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Bi-Level Drain'' means a drain with two inlets, each at a different elevation; these drains are typically used on roofs supporting ''overburden'' and are not to be used as an ''overflow''.
<li>''Drain leader'', as used in this Standard, means "a pipe that is installed to carry ''storm water'' from a ''waterproofing assembly'' to a ''storm building drain'' or ''sewer'' or other place of disposal” ("British Columbia Plumbing Code", Division A, [https://free.bcpublications.ca/civix/document/id/public/bcpc2018/bcpc_2018dap1s14 Article 1.4.1.2., "Defined Terms"]).
<li>''Flanged insert drain'' means a ''primary drain''
<ol>
<li>with a flat, broad flange that encircles, and is manufactured from the same material as, the drain opening or bowl,
<li>that is spun or hot-welded (not cast),
<li>that typically is secured to the ''waterproofing assembly'' with screw-type mechanical fasteners, and
<li>that is manufactured with a short length of drain pipe ("drain stem"), which is inserted into a ''drain leader'' and sealed against back-flow using a compression seal.
</li></ol>
<li>''Overflow drain'' ("overflow") means a ''secondary drain''
<ol>
<li>that serves as a safeguard when ''primary drains'' fail, and
<li>which may be located in the ''waterproofing system'' field (for example, as a secondary drain) or at the perimeter of the ''waterproofing assembly''.
</li></ol>
<li>''Primary drain'' means the primary means the primary collector of storm water for discharge, typically into a ''drain leader''.
<li>''Drain'' means a fitting or device that is installed in a ''waterproofing assembly'' or roof to permit storm water to discharge into a ''drain leader''. (adapted from the "British Columbia Plumbing Code", Division A, [https://free.bcpublications.ca/civix/document/id/public/bcpc2018/bcpc_2018dap1s14 Article 1.4.1.2., "Defined Terms"]).
<li>''Scupper drain'' ("scupper"), which is primarily used on roofs, means an open or closed drain that conveys water laterally from one area of a ''project'' to another, or from the ''project'' directly to the exterior of the building.
<li>''Secondary drain'' means a drain connected to a separate drainage system, typically situated at a higher elevation than a ''primary drain''. An ''overflow drain'' is a type of ''secondary drain''.
</li></ol>
</li></ol>

===11.1.2. Guarantee Term Requirements===
====11.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====11.1.2.2. Reserved====

====11.1.2.3. Reserved====

===11.1.3. All Systems===
====11.1.3.1. Principles of Design====

<ol>
<li>The ''Design Authority'' is responsible for the design of ''project'' drainage and ''continuity'' of ''control layers'', where these intersect with any part of the designed drainage system (Ref. [[#3.1.5.1. Securement against Specified Wind Loads | Article 3.1.5.1.]]; also see [[#6.1.3.2. Continuity of Control Layers | Article 6.1.3.2.]]).
<li>Notwithstanding that most ''waterproofing assemblies'' drain over an edge at grade, when the design requires mechanical drainage, the ''Design Authority'' must design the drainage system with ''drains'' and ''overflows'' sized to accommodate the anticipated precipitation for the building.
<li>Whereas the Building Code may not require the inclusion of ''overflows'' in all circumstances, and the RGC Standards require ''overflows'' in some locations (e.g., in membrane-lined gutters), the incorporation of properly sized and located overflows is strongly encouraged (Also see [[#11.1.4.2. Scuppers and Overflows | Article 11.1.4.2.]]).
<li>The size (flow rate) of ''drains'' and ''overflows'' must be determined using the "British Columbia Building Code" and "British Columbia Plumbing Code", with attention given to both average and large rainfall events (for rainfall capacities, refer to the [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbacr2 "British Columbia Building Code", Div. B, Appendix C, "Table C-2"], which lists rainfall loads using specific reference locations throughout the province (See [[#11.1.3.2. Roof Drain Function and Location | Articles 11.1.3.2.]] and [[#11.1.4.2. Scuppers and Overflows | 11.1.4.2.]] for function and location).
<li>The ''Design Authority'' should coordinate the various disciplines (including, without limitation, mechanical (plumbing) and structural engineers) to calculate proper flow rates, head pressure, and structural supports, in anticipation of significant, short-duration rain events; consideration should be given to various design elements (listed without limitation)
<ol>
<li>''project'' slope (more slope theoretically increases drainage and lessens live loading from rainfall) (Ref. [[#2.1.3.1. General Requirements for Roof Slope | Article 2.1.3.1., "General Requirements for Roof Slope"]]),
<li>rainfall rates for primary and overflow drainage,
<li>''primary'' and ''overflow drain'' capacities,
<li>hydraulic head (pressure), and
<li>the location of the ''drainage plane'' (the ''drainage plane'' is not necessarily the same as the ''finished system surface'', and the location of the ''drainage plane'' may affect the determination of live loads, which should be accounted for as part of drainage design).
</li></ol>
<li>When a ''waterproofing assembly'' or ''water-shedding assembly'' is designed to drain off an edge, water may drain freely or be collected by means of an external or membrane gutter (See [[#11.1.4.3. Membrane Gutters | Article 11.1.4.3.]]) and drained onto a lower roof assembly.
<li>When a ''waterproofing system'' is fully or partially replaced, all flanged drains, ''scuppers'', and ''overflows'', together with internal drain-to-pipe compression seals, and seals exposed to water or ultraviolet light, must be replaced.
<li>If a flow control is present in an existing cast ''drain leader'', the flow control should be reinstalled.
<li>''Waterproofing assemblies'' that support a ''overburden'' or are secured with ballast must be designed to incorporate a ballast guard that surrounds the drain and promotes proper drainage.
</li></ol>

====11.1.3.2. Drain Function and Location====

<ol>
<li>''Drains'' must be used only for draining water.
<li>The use of ''bi-level drains'' with adequate openings for both surface and subsurface drainage are mandatory for all inaccessible ''waterproofing systems'' that utilize interior drainage systems with low permeable wearing courses (poured concrete, bricks, unit masonry and stone set in mortar beds).
<li>''Drains'' on new construction ''projects'' must be located at least 457.2 mm (18") away from any adjacent ''drain'', penetration, upstand, edge, or ''wall'' (the separation space is measured between openings, excluding the flange), but this requirement does not apply to ''overflow drains'', ''scupper drains'', and membrane gutters (Ref. [[#11.3.3.7. Scuppers and Overflows | Article 11.3.3.7.]] for minimum requirements applicable to ''scuppers'' and ''overflows'').
<li>Notwithstanding the requirements in Sentence (1), a cast iron ''roof drain'' with a sump receiver must be placed well away from any interference with drain securement.
<li>When a ''waterproofing system'' is replaced and existing ''drains'' do not comply with the spacing requirements in this Part, the ''Design Authority'' must submit a drawn detail for a review by the ''''''Guarantor'''''; the detail must incorporate the following requirements and principles, together with requirements in [[#11.3.3. Drains | Subsection 11.3.3.]]:
<ol>
<li>''Wall'' membrane flashings must not terminate under the clamping ring of a cast drain.
<li>The clamping ring of a cast drain must be fully seated to ensure the drain will function properly.
</ol></li>
</ol></li>

===11.1.4. Drains and Membrane Gutters===
(The requirements for [[#11.1.3. All Systems | Subsection 11.1.3., "All Systems"]], shall be read together with the following Articles)

====11.1.4.1. Cast Iron Roof Drains====

<ol>
<li>Cast iron ''drains'' may be
<ol>
<li>cast into a concrete slab, or
<li>secured with an under-deck clamp when the ''deck'' is steel.
</li></ol>
<li>Only cast iron ''drains'', and existing external couplers used to connect ''drains'' to leaders, may be re-used for ''waterproofing system'' replacement ''projects''.
</li></ol>

====11.1.4.2. Scuppers and Overflows====

<ol>
<li>A ''scupper drain'' may be used as a ''primary drain'', a ''secondary drain'', or as an ''overflow''.
<li>Overflows, which are emergency stormwater discharge outlets installed to activate when ''primary drains'' are blocked and to prevent structural damage,
<ol>
<li>should be located around the perimeter of a ''waterproofing assembly'', through ''parapets'' (recommended), but
<li>may be a ''secondary drain'' in the field provided it is plumbed in keeping with the “British Columbia Plumbing Code”, Div. B, Subsection 2.4.6 and Article 2.4.10.4. [[Notes to GLW Standard#A-11.1.4.2. | (See Note A-11.1.4.2.)]].
</li></ol>
<li>Where no ''overflows'' are specified, the building structure should be designed to carry the total load of water collected on the ''waterproofing assembly'', in the event of ''primary drain'' failure.
<li>''Overflows'' located at the perimeter of the roof must be
<ol>
<li>designed as open-wall ''scuppers'' for ''parapets'' measuring 152.4 mm (6”) or less in height (Ref. Construction Detail [[SBS Open-wall Scupper Drain | "Open-wall Scupper Drain"]]), or
<li>designed around the principles of a through-wall ''scupper'' when ''parapets'' are higher than 152.4 mm (6”) (Ref. Construction Detail [[SBS Through-wall Scupper Drain | "Through-wall Scupper Drain"]]), and (irrespective of design) shall be
<ol>
<li>located no higher than 101.6 mm (4”) above the ''drainage plane'' at the roof drain (See '''Figure 11.1.4.2.-A'''; also see [[Notes to GLW Standard#A-11.1.4.2. | Note A-11.1.4.2.]]),
<li>installed at least 25.4 mm (1”) lower than the lowest elevation of a door, window, or other low-clearance opening, to prevent water intrusion,
<li>situated so that they freely and visibly discharge storm water,
<li>protected with a ballast guard when the ''overflow'' is located below the ''finished system surface'', and
<li>specified to conform to the spacing and capacities required by the "National Plumbing Code of Canada", Division B, [https://nrc-publications.canada.ca/eng/view/ft/?id=6e7cabf5-d83e-4efd-9a1c-6515fc7cdc71#%5B%7B%22num%22%3A310%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C250%2Cnull%5D Article 2.4.10.4.] (See also [[#11.1.3.1. Principles of Design | Article 11.1.3.1., "Principles of Design"]]).
</li></ol>
</li></ol>
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 11.1.4.2.-A Overflow location relative drainage plane at primary drain''' Forming Part of Article 11.1.4.2. (Click to expand illustration)
|-
| [[File:Part 11 - Illustration - Figure 11.1.4.2.-A.png|link=https://rpm.rcabc.org/images/5/5b/Part_11_-_Illustration_-_Figure_11.1.4.2.-A.png | 600 px]]
|}
</li></ol>

====11.1.4.3. Reserved====

====11.1.4.4. Drains in Planters====

<ol>
<li>''Drains'' designed for structural planters must conform to the requirements in [https://rpm.rcabc.org/index.php?title=VRA_Standard#6.1.3.2._Planter_Drainage Article 6.1.3.2.] of the “RGC Standard for Vegetated Roofs”.
</ol></li>

==Section 11.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===11.2.1. Material Properties===
====11.2.1.1. General Requirements====

<ol>
<li>Except for cast iron ''drains'', which are usually supplied and installed by others, only new ''drains'' and penetration flashings listed in [[Division_C | Division C]] may be used.
<li>All ''drains'' and overflows must conform to CSA ASME A112.6.4-2022/CSA B79.4-2022, "Roof, deck, and balcony drains", unless otherwise permitted by the '''''Guarantor'''''.
<li>Reuse of any penetration flashing or ''drain'' (except serviceable cast iron ''drains'') is prohibited and may void the ''Guarantee'' (See Division A, [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Article 3.2.1.2.]]).
<li>When an existing cast iron ''drain'' is serviceable and reusable, all broken threaded rods, clamping rings, and drain strainers (“baskets”) must be replaced with new components suitable to the specific ''drain''.
<li>Where ''drains'' or ''overflows'' are fabricated from stainless steel, the stainless steel shall be Grade 316L and shall conform to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”.
<li>Sheet membranes used to flash (strip in) ''drains'' shall be reinforced with polyester or a composite scrim, but in any event must conform to the membrane requirements found in [[#9.2.1.1. Membrane Composition, Thickness, and Selection | Article 9.2.1.1.]]
</li></ol>

====11.2.1.2. Drains and Scuppers====
(See [[Notes to GLW Standard#A-11.2.1.2. | Note A-11.2.1.2.]])

<ol>
<li>All ''drains''
<ol>
<li>must be designed and manufactured for ''waterproofing system'' applications only, and shall not be floor drains, and
<li>shall be made so that the waterproofing membrane can be sealed to the drain body or bowl (the membrane seal must not rely solely on a clamping ring).
</li></ol>
<li>Cast iron ''primary drains''
<ol>
<li>must be supplied with a clamping ring, drain strainer, and ballast guard, and
<li>must be installed by the trade supplying the ''drain''.
</li></ol>
<li>When the deck is steel, cast iron ''drains'' should be supplied with an under-deck clamp that is secured separately from the clamping ring and strainer.

<li>Cast iron planter ''drains'' must be supplied with a perforated riser that is proprietary to the drain manufacturer (See the “RGC Standard for Vegetated Roofs”, [https://rpm.rcabc.org/index.php?title=VRA_Standard#6.1.3.2._Planter_Drainage Article 6.1.3.2]).
<li>Cast iron ''scupper drains'' must be
<ol>
<li>supplied with a clamping strainer, and
<li>designed with cast, enclosed (captive) strainer bolt receivers (drains with bolts exposed on the back side of the drain body are not acceptable).
</li></ol>
<li>Lead sheet flashing, when specified, must be sized to extend past the drain bowl by at least 152.4 mm (6”), and must have a weight of at least 15 kg/m2 (3 lb/ft2).
<li>All ''primary'' ''flanged insert drains'' (drains with a stem that inserts into a drain leader)
<ol>
<li>must be manufactured with a hot-welded or seamless flange at least 101.6 mm (4”) wide (measured from the outer edge of the drain opening),
<li>must be hot-welded at the joints between the bowl/flange and drain stem, and
<li>must be installed with a clamping ring.
</li></ol>
<li>''Primary flanged drains'' (insert drains or scuppers) that connect with plumbing inside the building (“internal” drains) must be constructed of
<ol>
<li>copper (min. weight: 24 oz. sheet copper; min. thickness: 20-gauge, or 0.889 mm (0.035”)),
<li>aluminum (min. thickness: 12-gauge, or 2.053 mm (0.08081”)), or
<li>stainless steel, Grade 316L (min. thickness: 18 gauge, or 1.27 mm (0.050”)).
</li></ol>
<li>''Primary flanged drains'' (insert drains or scuppers) that drain directly to the exterior of the building (“external” drains) must be constructed of
<ol>
<li>copper (min. weight: of 16 oz.; min. thickness: 24-gauge, or 0.559 mm (0.022”)), or
<li>aluminum (min. thickness: 20-gauge material, or 0.812 mm (0.03196”)).
</li></ol>
<li>All ''scupper drains'' (open, or closed (boxed)) must be
<ol>
<li>manufactured with welded seams and joints,
<li>designed to extend past the outside face of the wall, and
<li>fabricated from
<ol>
<li>copper (min. weight: 16 oz.; min. thickness: 24-gauge, or 0.559 mm (0.022”)), {{strike| or || 2025-May-29 }}
<li>aluminum (min. thickness: 20-gauge material, or 0.812 mm (0.03196”)), or
<li>stainless steel, Grade 316L (min. thickness: 18 gauge, or 1.27 mm (0.050”)).
</li></ol>
</li></ol>
<li>In addition to the general requirements for ''scupper drains'', closed (boxed) ''scupper drains'' must also be
<ol>
<li>fully enclosed on four sides, for through-wall applications,
<li>fabricated with a drip edge at the bottom outside edge of the ''drain'' to deflect overflow water away from the building, and
<li>fitted with an overflow opening on the outside face of the ''scupper'',
<ol>
<li>equal in capacity to the main ''drain leader'' opening, and
<li>at least 38.1 mm (1 ½”) lower than the top surface of the ''scupper drain''.
</li></ol>
</li></ol>
<li>''Overflow drains''
<ol>
<li>must be manufactured from copper or aluminum conforming to the material requirements in Sentence (9) above, but
<ol>
<li>may be manufactured from ferrous metals (See [[#Section 13.2. Materials |Section 13.2.]]), and
<li>may be manufactured from stainless steel, but the steel shall be Grade 316L stainless steel (min. thickness: 20 gauge, or 0.9525 mm (0.0375”)), and
</li></ol>
<li>must have a hot-welded or seamless flange at least 101.6 mm (4”) wide when measured from the outer edge of the drain opening.
</li></ol>
<li>All ''drains'' utilized in a ''roof assembly'' that includes gravel ballast or growing media (soil) must be supplied with the drain manufacturer's proprietary primary drain strainer and secondary stainless-steel ballast guard, but when one is not provided, a custom-fabricated guard may be used provided the guard
<ol>
<li>is fabricated from 20-gauge stainless-steel (0.9525 mm or 0.0375”),
<li>incorporates 6.35 mm (1/4”) perforations, and
<li>equals or exceeds the height of the ''finished system surface''.
</li></ol>
</li></ol>

====11.2.1.3. Reserved====

====11.2.1.4. Fasteners====

<ol>
<li>Mechanical fasteners used to secure ''scuppers'' and ''overflows'' must be
<ol>
<li>properly sized in accordance with ''waterproofing system'' securement requirements (See [[#Part 3 - Securing the Roof Assembly | Part 3]]), and shall be
<ol>
<li>self-drilling purpose-made screws manufactured with deep, recessed heads.
</li></ol>
</li></ol>
</li></ol>

====11.2.1.5. Sealants====

<ol>
<li>Sealants must be manufactured by, or acceptable to, the ''manufacturer''.
<li>Compression sealants must be formulated to provide waterproofed seals under compressive loads.
</li></ol>

====11.2.1.6. Liquid Membrane Flashing====

<ol>
<li>Only a RoofStar-accepted reinforced two-component catalyzed polymethyl methacrylate (PMMA) liquid membrane flashing system may be used on the water plane to flash ''drains'', ''scuppers'', and ''overflows''.
</ol></li>

==Section 11.3. Application==
===11.3.1. Guarantee Term Requirements===
====11.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====11.3.1.2. Reserved====

===11.3.2. All Systems===
====11.3.2.1. Condition and Suitability of Drains====

<ol>
<li>All clamping rings and strainers must be unbroken, properly seated, and fully secured.
</li></ol>

====11.3.2.2. Location and Spacing of Drains====
(See also [[#Section 11.1. Design | Section 11.1., "Design"]])

<ol>
<li>''Drains'' for new construction ''projects'' must be located at least 457.2 mm (18") away from any adjacent ''drain'', penetration, upstand, edge, or ''wall'' (the separation space is measured between openings, excluding the flange).
<li>The 457.2 mm (18") spacing requirement for ''drains'' does not apply to ''overflows'', ''scupper drains'', and drains used in membrane gutters.
<li>''Drains'' and cap membrane seams must be offset from each other at least 304.8 mm (12”), measured from the edge of the ''drain''.
</li></ol>

====11.3.2.3. Drain Protection Against Blockage====

<ol>
<li>All ''drains'' must be supplied and installed with a secured strainer to prevent debris from blocking the ''drain''.
<li>When a ''waterproofing assembly'' supports ''overburden'' or is secured with ballast, drains must be installed together with a surrounding ballast guard that promotes water flow.
<li>When the ''overburden'' is landscaping, ''drains'' must be protected by both a stone/ballast guard and a ''separation zone'', as required in [https://rpm.rcabc.org/index.php?title=VRA_Standard#5.1.3.3._Separation_of_vegetation_from_roofing_details {{hilite |Article 5.1.3.3.] of the "RGC Standard for Vegetated Roofs".
</ol></li>

====11.3.2.4. General Installation Requirements====

<ol>
<li>''Drains'' must be
<ol>
<li>secured to the ''supporting deck'' structure, or to blocking, and
<li>properly detailed for ''continuity'' with specified ''control layers''.
</ol></li>
<li>''Drains'' must be flashed using the primary membrane system or accessories acceptable to the ''manufacturer'' and the '''''Guarantor'''''.
<li>When fleece-reinforced liquid membrane systems are used to flash drains, only a RoofStar-accepted reinforced two-component catalyzed polymethyl methacrylate (PMMA) may be used on the ''drainage plane'' to flash ''drains'', ''scuppers'', and ''overflows''.
</ol></li>

===11.3.3. Drains===
(The requirements for [[#11.3.2. All Systems | Subsection 11.3.2., "All Systems"]], shall be read together with the following Articles)

====11.3.3.1. Reserved====

====11.3.3.2. General Requirements for Cast Iron Drains====

<ol>
<li>Cast iron ''drains'' must be installed by the plumbing/mechanical trade.
<li>When cast iron ''drains'' are used and the ''deck'' is steel, a sump receiver and under-deck clamp must be provided and installed by the trade supplying the drain.
<li>Drain extensions for cast iron roof drains should be avoided.
<li>Existing flow controls removed during ''project'' construction should be reinstalled; however, if the replacement ''waterproofing assembly'' will support landscaping, the drainage design must conform to the requirements set out by the '' Design Authority''.
<li>''Drains'' shall be connected to internal piping by mechanical compression type seals only; the use of "O"-rings, mastics and caulking, is not acceptable for sealing to internal piping.
<li>All cast iron ''drains'' must be
<ol>
<li>new or clean,
<li>unbroken (this also applies to clamping rings, threaded rod, strainers, and ballast guards), and
<li>flashed in accordance with the ''manufacturer's'' published instructions, or to the requirements published in this Part, whichever are greater.
</li></ol>
<li>The ''continuity'' of air and vapour ''control layers'' must be maintained, where the controls are specified.
</li></ol>

====11.3.3.3. Cast Iron Drains Installed with Lead Flashing====

<ol>
<li>All cast iron ''drains'' installed with lead flashing shall conform to the means and methods described and required in [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#11.3.3.3._Cast-iron_Drains_Installed_with_Lead_Flashing Article 11.3.3.3.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs" (lead flashing is not used with cast-iron drains installed in hot fluid-applied rubberized asphalt membranes).
</li></ol>

====11.3.3.4. Cast Iron Drains Installed with Membrane Flashing====

<ol>
<li>All cast-iron drains installed with membrane flashing shall conform to the means and methods described and required in the applicable RGC Standard for roofs:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#11.3.3.4._Cast-iron_Drains_Installed_with_Membrane_Flashing Article 11.3.3.4.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#11.3.3.4._Cast-iron_Drains_Installed_with_Membrane_Flashing Article 11.3.3.4.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>When the waterproofing membrane is SBS,
<li>the clamping ring must be set in and bolted down to a warm, newly applied membrane, to ensure a good seal, or
<li>the sheet membrane may be sealed to the drain bowl with the application of a 2-component fleece-reinforced PMMA liquid flashing system that overlaps the sheet membrane at least 200 mm (8”) onto the drain flange and into the exposed drain bowl by no less than 50.8 mm (2”).
</li></ol>
</li></ol>

====11.3.3.5. Cast-iron Roof Drain Retrofitting (Replacement Roofing)====

<ol>
<li>Retrofitting a cast iron ''drain'' is not recommended, but when retrofitting is unavoidable (i.e., the ''drain'' has deteriorated to the extent that it cannot receive a new waterproofing membrane, and removal is not possible),
<ol>
<li>remove any broken parts and debris,
<li>clean and prepare all surfaces of the ''drain'' that will receive new waterproofing materials,
<li>seal any cracks in the bowl with a 2-component fleece-reinforced PMMA liquid flashing system, applied to the inside of the drain bowl, ensuring that the flashing system extends at least 50.8 mm (2”) on either side of the crack,
<li>connect the retrofit insert to internal leaders using only an external coupling (unless impractical - see alternative requirements below), and
<li>follow the requirements set out in [[#11.3.3.2. General Requirements for Cast Iron Roof Drains | Article 11.3.3.2.]]
</li></ol>
<li>When an internal compression seal is used out of necessity to connect a retrofit ''drain'' to an existing ''drain leader'',
<ol>
<li>the joint must be properly prepared to ensure the joined surfaces are clean, smooth, and uniform, and
<li>honing out the cast pipe may be required.
</li></ol>
<li>In the absence of a clamping collar, the retrofit insert ''drain'' must be sealed to the primary membrane with another method acceptable to the ''manufacturer'' and the '''''Guarantor''''' (Ref. [[#11.2.1.6. Liquid Membrane Flashing | Article 11.2.1.6.]]).
</li></ol>
</li></ol>

====11.3.3.6. Flanged Insert-type Roof Drains====

<ol>
<li>Flanged insert drains installed with SBS-modified bituminous sheet membranes must conform to the requirements in [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#11.3.3.6._Flanged_Insert-type_Roof_Drains Article 11.3.3.6.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
</li></ol>

====11.3.3.7. Scuppers and Overflows====

<ol>
<li>When ''scuppers'' and ''overflows'' are used, their installation shall conform to the means and methods described and required in the applicable RGC Standard for roofs:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#11.3.3.7._Scuppers_and_Overflows Article 11.3.3.7.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#11.3.3.7._Scuppers_and_Overflows Article 11.3.3.7.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
</li></ol>

====11.3.3.8. Reserved====

<hr>
<div id=PART_12></div>

=Part 12 - Penetrations and Curbs=
==Section 12.1. Design==
===12.1.1. General===
====12.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====12.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===12.1.2. Guarantee Term Requirements===
====12.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====12.1.2.2. Reserved====

===12.1.3. All Systems===
====12.1.3.1. General Requirements for Penetrations====

<ol>
<li>The use of curbs conforming to [[#12.1.3.4. Curbs, Sleepers, and Equipment Pads | Article 12.1.3.4.]] is required for mounting for all venting units and equipment.
<li>Where openings or penetrations pass through the ''waterproofing assembly'' (i.e., for mechanical or electrical services), the specification and detail drawings shall
<ol>
<li>provide direction for ''continuity'' of ''control layers'', where these layers intersect with any opening or penetration, and
<li>require a ''curb'' or an acceptable penetration flashing to enclose and seal each opening in the assembly.
</li></ol>
<li>Each penetration (except for clustered or bundled electrical cables) must be flashed separately from others.
<li>Single or bundled electrical cable penetrations must be flashed with a suitable goose-neck flashing, fitted with a weather head.
<li>Penetration flashings must be
<ol>
<li>new,
<li>suitable for the type of penetration,
<li>sized to elevate the open end of the flashing or weather-head at least 203.2 mm (8”) above the ''finished system surface'', and
<li>properly sized and fitted around the penetration to permit a seal (gaps between the penetration and the inside of the flashing shall be no more than 12.7 mm (1/2"), or
<li>of sufficient height to be made water-tight with a site-fabricated membrane seal fashioned to enclose the gap between the flashing and the penetration (see '''Figure 12.3.2.1.-A'''); the application of liquid sealant around the penetration in an open-top flashing is not acceptable.
</li></ol>
<li>Notwithstanding the minimum height requirement for flashings in Sentence (5), when services penetrate the ''waterproofing assembly'' and must be concealed below the ''finished system surface'', the flashing for the penetration shall be no less than 101.6 mm (4”) in height and the penetration shall be sealed to the flashing, but a leak through the penetration or its seal with the flashing is not covered by a '''''RoofStar Guarantee'''''.
<li>Hollow steel penetrations and structures that penetrate the ''waterproofing system'' above a conditioned space should be filled with spray foam and topped with pourable sealant.
<li>Hollow steel penetrations and structures that are manufactured with vent holes (necessary during galvanizing) must be fitted with lead plugs in the holes to prevent water ingress (plugs should be cut flush with the outside face of the penetration).
<li>Penetration flashings
<ol>
<li>that are or may be prone to condensation should be factory-insulated, and
<li>should be selected for their ability to inhibit the intrusion of vermin and insects into the roof assembly and building interior.
</li></ol>
<li>Suitable flashings must be specified for penetrations that are expected to expand, contract, or otherwise move.
<li>Cylindrical ("pipe-type") penetrations must be sealed with
<ol>
<li>the ''manufacturer’s'' proprietary pre-molded flashing that utilize mechanical clamps,
<li>a 2-part site-fabricated or proprietary flashing with a removable inspection/access cap (Ref. Construction Detail [[SBS 2-Part Retrofit Flashing (Cable Penetration) | "2-Part Retrofit Flashing (Cable Penetration)"]]), or
<li>roof ''curbs'' fitted with customized metal hoods or square-to-round metal flashing.
</li></ol>
<li>Aluminum or copper flashings for penetrations may be located at the ''drainage plane'' in any assembly type.
</li></ol>

====12.1.3.2. Galvanized Penetration Flashings====

<ol>
<li>The use of galvanized flashings and vents is not recommended, but when they are specified, they shall be elevated on ''curbs'' no less than 203.2 mm (8") in height above the ''finished system surface''.
</li></ol>

====12.1.3.3. Separation Between Details====

<ol>
<li>Penetrations on new construction ''projects'' must be separated from other penetrations, drains, curbs, walls, or changes in plane so that the space between flashings for these details is at least 304.8 mm (12") (this is measured between openings or the edge of a detail and excludes the flashing flange); the exception to this requirement is customized penetration flashings designed for multiple individual or clustered penetrations.
<li>When the separation between details does not comply with the spacing requirements in this Part, only the alternate application methods described in [[#12.3.2.1. General Requirements for Flashing Penetrations | Article 12.3.2.1.]] of the related waterproofing roof Standard will be permitted by the '''''Guarantor''''':
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#12.3.2.1._General_Requirements_for_Flashing_Penetrations Article 12.3.2.1.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#12.3.2.1._General_Requirements_for_Flashing_Penetrations Article 12.3.2.1.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
<li>Where alternate methods are not available in this Standard, or where the space between penetration flashings and any change in plane (e.g., ''curb'', sleeper, ''parapet'') is less 203.2 mm (8”), a Variance request shall be submitted to the '''''Guarantor''''' by the ''Design Authority'' following the Variance requirements in [[#1.1.3.6. Variances | Article 1.1.3.6.]]
</li></ol>
</li></ol>

====12.1.3.4. Curbs, Sleepers, and Equipment Pads====

<ol>
<li>The design and placement of ''curbs'' and sleepers shall be the responsibility of the ''Design Authority''.
<li>''Curbs'' must be designed so that they can be secured directly to the ''deck'' structure, or to intermediate blocking, and must not be situated on top of the ''waterproofing system''.
<li>All ''curbs'', sleepers, and deck-supported equipment pads must be designed to achieve a minimum height of 203.2 mm (8”), measured from the ''finished system surface'', to permit proper membrane flashing.
<li>Notwithstanding the minimum height requirement membrane flashing, ''curbs'' and sleepers that are completely sealed (enveloped) with membrane, and are free of penetrations through the top face (i.e., equipment isolators) may be less than 203.2 mm (8”) in height, measured from the ''finished system surface'', but shall be
<ol>
<li>no less than 101.6 mm (4") in height, or
<li>no less than 127 mm (5") in height when capped with a ''linear metal flashing''.
</li></ol>
<li>Equipment isolators are not considered part of the ''waterproofing system'' and therefore any leaks caused by or occurring at isolators shall be excluded from coverage under the '''''RoofStar Guarantee'''''.
<li>Equipment ("housekeeping") pads placed on top of the ''finished system surface'' and supporting combined loads
<ol>
<li>less than 90 kg (200 lbs) must be separated from the membrane with a bond-breaking layer (i.e., XPS insulation), and
<li>greater than 90 kg (200 lbs) must conform to the requirements for structural sleepers or equipment pads.
</ol></li>
<li>Reinforced liquid membrane flashing systems may be specified only where
<ol>
<li>sheet membrane applications are not practicable (i.e., complex geometry), or
<li>the top edge of membrane plies must be terminated on a vertical surface and other means of termination are not practicable or even possible.
</li></ol>
<li>''Curbs'' enclosed within or adjacent to landscaping shall be designed with base metal flashings to retain the root barrier and any other system components that must be turned up the vertical surface; base flashings shall be fabricated and installed in keeping with the requirements in [[#Part 13 - Linear Metal Flashing | Part 13]] (See [[#13.1.3.6. Cap Flashing, Counter-flashing, and Reglet Flashing | Articles 13.1.3.6.]], [[#13.2.2.1. Fabrication of Flashing | 13.2.2.1.]], and [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | 13.3.2.3.]]; also see Clause (1)(8) of Article 10.3.2.5., “Installation of Root Barrier”, in the [https://rpm.rcabc.org/index.php?title=VRA_Standard#10.3.2.5._Installation_of_Root_Barrier "RGC Standard for Vegetated Roofs"]).
</li></ol>

====12.1.3.5. Protection of Waterproofing Membranes====

<ol>
<li>The ''Design Authority'' must consider and specify mitigating strategies to preserve the waterproofing membrane from damage (i.e., specifying grease guards or a reinforced 2-part liquid membrane coating) when mechanical equipment extracts and discharges grease, chemicals, or other contaminants, onto the roof.
</li></ol>

====12.1.3.6. Railings, Ladders, and Other Attached Structures====

<ol>
<li>Railings, ladders, and other attached structures shall not be affixed at the field membrane level and must be designed for attachment to vertical surfaces only so that fasteners are elevated above the ''finished system surface'' at least 88.9 mm (3-1/2”).
<li>Ladders, railings, or other structures that may penetrate the ''waterproofing system'', should be designed to minimize thermal bridging (and consequential condensation) or reduced thermal performance; uninsulated direct, rigid connections to the structural ''deck'' or ''walls'' is strongly discouraged.
</li></ol>

==Section 12.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===12.2.1. Material Properties===
====12.2.1.1. Membranes Used for Flashing====

<ol>
<li>Sheet membranes used to flash (strip in) penetrations and ''curbs'' shall be
<ol>
<li>the same membrane used on the system field, or
<li>sheet or liquid membranes conforming to [[#10.2.1.1. Flashing Membranes | Article 10.2.1.1.]]
</li></ol>
</li></ol>

====12.2.1.2. General Requirements for Penetration Flashings====

<ol>
<li>All penetration flashings, except flashings that are proprietary to the ''manufacturer'' {{hilite | and flashings that are installed or supplied by others as part of a Code-compliant, certified chimney assembly (i.e., for solid fuel heating appliances) || 2023-October-28 }}, must be
<ol>
<li>sized to elevate the open end of the flashing or weather-head at least 203.2 mm (8”) above the ''finished system surface'',
<li>accepted by or acceptable to the '''''Guarantor''''',
<li>manufactured to conform to CSA-B272, "Prefabricated Self-Sealing Roof Vent Flashings" (a penetration flashing fabricated by the ''Contractor'' is exempt from this requirement),
<li>permanently marked with the standard number it conforms to, which shall be independently validated through published testing by a qualified third-party,
<li>manufactured from sheet metal conforming to the material requirements in [[#Section 13.2. Materials | Section 13.2.]], when the flashing is custom-made or fabricated by the ''Contractor'',
<li>compatible with the ''waterproofing system'',
<li>seamless or, in the alternative, fabricated with fully hot-welded joints, including a base flange at least 101.6 mm (4”) wide,
<li>capable of inhibiting the intrusion of vermin and insects into the ''roof assembly'' and building interior, and
<li>at least 203.2 mm (8”) tall when measured from the ''finished system surface'' to an opening, or to the top of the flashing.
</li></ol>
<li>Metal penetration flashings that are purpose-made for
<ol>
<li>electrical cables must be goose-necked and supplied with a downward-facing weather head that incorporates proprietary rubber-based friction seals, and
<li>plumbing vents shall be supplied with a matching settlement cap produced by the same manufacturer.
</li></ol>
<li>Galvanized penetration flashings, and galvanized vents, must
<ol>
<li>meet or exceed the CSA-A93 Standard,
<li>be made with material galvanized steel (26-gauge or heavier) conforming to the metal requirements found in [[#Part 13 - Linear Metal Flashing | Part 13, "Linear Metal Flashing"]], and
<li>be at least 203.2 mm (8”) tall when measured from the ''finished system surface'' to an opening.
</li></ol>
<li>In addition to the requirements in Sentence (1), stainless-steel penetration flashings specified for corrosive environments should be made of Grade 304 stainless steel conforming to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”, but when the penetration flashings may be subjected to regular or constant exposure to or immersion in water (especially in a coastal environment), or to corrosive environments, the stainless steel shall be Grade 316L (conforming to the same ASTM standard) (See [[Notes to GLW Standard#A-13.2.1.2.(3)(2)| Note A-13.2.1.2.(3)(2)]]).
<li>Storm collars
<ol>
<li>must be fashioned from galvanized or stainless steel,
<li>must slope downward from the penetration approximately 45°,
<li>shall be at least 50.8 mm (2”) wide,
<li>shall be self-locking or, in the alternative, manufactured to receive a mechanical band clamp, and
<li>should be fabricated with a channel at the top edge, for retaining sealant.
</li></ol>
<li>EPDM used to form a seal between a penetration and its flashing (Ref. [[#12.3.2.1. General Requirements for Flashing Penetrations | Article 12.3.2.1.(12)]]) shall be semi-cured and possess a nominal thickness of no less than 60 mils.
<li>Unshielded flexible mechanical couplings used to join a flashing and a pipe penetration shall be
<ol>
<li>certified to meet ASTM C564 or ASTM D5926,
<li>certified to meet ASTM C1173 and CSA-B602,
<li>supplied with top and bottom proprietary screw-type stainless steel mechanical clamps,
<li>leak-proof, resistant to chemicals, UV-stable, and
<li>suitable for the penetration and flashing they join together.
</li></ol>
</li></ol>

====12.2.1.3. Flashings for Heating and Plumbing System Penetrations====

<ol>
<li>All plumbing vent flashings shall be non-ferrous.
<li>Lead plumbing vent flashings are not permitted.
<li>In addition to the general requirements in [[#12.2.1.2. General Requirements for Penetration Flashings | Article 12.2.1.2.]], all metal penetration flashings (except natural airflow vents) used for heating and plumbing penetrations must be
<ol>
<li>properly sized for the penetration, both in diameter and height, and
<li>supplied with a properly sized galvanized storm collar or settlement cap.
</li></ol>
</li></ol>

====12.2.1.4. Liquid Membrane Flashing====

<ol>
<li>Polymethyl methacrylate (PMMA) and polyurethane methyl methacrylate (PUMA) liquid membrane flashing systems must be
<ol>
<li> catalyzed 2-component systems,
<li>fleece-reinforced with the manufacturer's proprietary polyester fleece, and
<li>accepted listed in [[Division C | Division C]] of this ''Manual''.
</li></ol>
<li>Single-component polyurethane and silicon-based liquid membrane flashing system must be listed in [[Division C | Division C]].
<li>Accessory PMMA detailing products
<ol>
<li>must be listed in [[Division C | Division C]], and
<li>must be reinforced with chopped or loose reinforcement fibres supplied by the ''manufacturer''.
</li></ol>
</li></ol>

==Section 12.3. Application==
===12.3.1. Guarantee Term Requirements===
====12.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====12.3.1.2. Reserved====

===12.3.2. All Systems===
====12.3.2.1. General Requirements for Flashing Penetrations====

<ol>
<li>All penetration flashing materials must be new.
<li>Anything that penetrates through the ''waterproofing assembly'', including openings in ''walls'' and for ventilation, must be
<ol>
<li>sealed to each ''control layer'' that it passes through or intersects, and
<li>flashed with
<ol>
<li>a flashing proprietary to and supplied by the membrane ''manufacturer'',
<li>a ''curb'',
<li>a purpose-made flashing, or
<li>a custom-fitted flashing{{strike| , all of which shall be sealed to the ''roof system'' so that the penetration or opening is protected from water ingress, to at least 203.2 mm (8") above the ''finished system surface''|| 2025-October-22 }}.
</li></ol>
</li></ol>
<li>Except for flashings that are proprietary to and supplied by the membrane ''manufacturer'', all flashings for penetrations in the system field shall be sealed to the ''waterproofing system'' so that the penetration or opening is protected from water ingress, to at least 203.2 mm (8") above the ''finished system surface''.
<li>Each penetration must have its own flashing (except where a purpose-made flashing is designed for multiple penetrations), and each flashing
<ol>
<li>must be suitable for the slope and penetration,
<li>shall be fitted with a cap, hood, weather-head, or closure fitting,
<li>shall not be left open to the weather, insects, or vermin, and
<li>must be properly sized and fitted around the penetration to permit a seal.
</li></ol>
<li>Except for storm collars, or where sealant pockets are permitted ([[#12.3.2.8. Sealant Pockets |Article 12.3.2.8.]]), the use of sealants to make a penetration watertight where it exits a flashing is not acceptable.
<li>Pipe penetrations in the roof field (e.g., plumbing vents)
<ol>
<li>must be at least 203.2 mm (8”) high, when measured from the ''finished system surface'',
<li>must be flashed with a spun flanged flashing at least 203.2 mm (8”) high, when measured from the ''finished system surface'',
<li>shall match the height of the flashing opening (pipes that are too short must be extended in a watertight manner), and
<li>shall be enclosed at the opening with a cap, supplied by the flashing manufacturer, that fits inside the pipe penetration and snugly fits around the outside of the flashing tube (caps should not be mechanically fastened to the flashing).
</li></ol>
<li>Hollow steel penetrations and structures with vent holes from the galvanizing process (e.g., ladders that are anchored to the ''project'' ''deck'' and penetrate the ''waterproofing system'') must be plugged with lead to prevent leaks.
<li>Non-ferrous penetration flashings and vents that conform to the material requirements in [[#Section 12.2. Materials | Section 12.2.]] may be located at the ''drainage plane'' in any assembly type.
<li>Lead penetration flashings are not permitted.
<li>All penetration flashings must be clean, dry, absolutely free of contaminants, have an exterior finish that is suitable to receive sheet or liquid membrane flashing, and must be prepared in keeping with any surface preparation requirements published by the membrane ''manufacturer''.
<li>Cable and horizontal pipe penetrations must be flashed with
<ol>
<li>a purpose-made flashing (i.e., a goose-neck flashing fitted with a weather head),
<li>a sheet membrane-flashed curb fitted with a customized sheet metal hood (shaped to function like a weather head), or
<li>a 2-component fleece-reinforced liquid membrane flashing as described in [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6.]] (when other methods are not possible or practicable).
</ol></li>
<li>Cables and piping (tubing) passing through a penetration flashing should be drooped (when possible), or fitted with a capillary-breaking collar and sealed at any openings, to prevent water from tracking along the cable or pipe, or to prevent wind-driven rain from entering the flashing, into the building; water that enters a building in this way bypasses the ''waterproofing system'' and does not constitute a leak and is therefore excluded from coverage under the '''''RoofStar Guarantee''''' (See '''Figure 12.3.2.1.A''' and '''12.3.2.1.-B''').
 
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 12.3.2.1.-A Flexible penetration showing drip loop and sealant''' Forming Part of Sentence 12.3.2.1.(13) (Click to expand illustration)
|-
| [[File:Part 12 - Illustration - Figure 12.3.2.1.-A.png|link=https://rpm.rcabc.org/images/6/6d/Part_12_-_Illustration_-_Figure_12.3.2.1.-A.png | 600 px]]
|}
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 12.3.2.1.-B Piping (tubing) penetrations through curb and metal hood flashing''' Forming Part of Sentence 12.3.2.1.(13) (Click to expand illustration)
|-
| [[File:Part 12 - Illustration - Figure 12.3.2.1.-B.png|link=https://rpm.rcabc.org/images/a/af/Part_12_-_Illustration_-_Figure_12.3.2.1.-B.png | 600 px]]
|}

<li>Penetration flashings must be sealed into the ''waterproofing system'' following the means and methods described and required in the applicable RGC Standard for roofs:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#12.3.2.1._General_Requirements_for_Flashing_Penetrations Article 12.3.2.1.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#12.3.2.1._General_Requirements_for_Flashing_Penetrations Article 12.3.2.1.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</ol></li>
</ol></li>

====12.3.2.2. Galvanized Penetration Flashings====

<ol>
<li>Galvanized, hot-welded flashings and vents may be installed on ''uninsulated systems'' or in a ''protected waterproofing system'', provided they are installed on ''curbs'' no less than 203.2 mm (8") in height above the ''finished system surface'' (Ref. [[#11.1.3.2. Roof Drain Function and Location | Article 12.1.3.2.]]) and are sealed to the ''curbs'' with sheet membrane.
</ol></li>

====12.3.2.3. Separation Between Penetration Flashings====

<ol>
<li>Penetrations on new construction ''projects'' must be separated from
<ol>
<li>other penetrations, ''curbs'', ''walls'', or changes in plane so that the space between flashings for these details is at least 304.8 mm (12") (this is measured between openings or the edge of a detail and excludes the flashing flange), and
<li>''roof drains'' at least 457.20 (18") (Also see [[#11.1.3.2. Roof Drain Function and Location | Article 11.1.3.2.]]).
</li></ol>
<li>When the separation between penetration flashings does not conform to the minimum spacing requirements, the application options described in [[#12.3.2.1. General Requirements for Flashing Penetrations | Article 12.3.2.1.]] of the applicable RGC Standard for roofs must be followed.
</li></ol>

====12.3.2.4. Curbs, Sleepers, and Equipment Pads====

<ol>
<li>Curbs shall be waterproofed following the means and methods described and required in the applicable RGC Standard for roofs:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#12.3.2.4._Curbs.2C_Sleepers.2C_and_Equipment_Pads Article 12.3.2.4.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#12.3.2.4._Curbs.2C_Sleepers.2C_and_Equipment_Pads Article 12.3.2.4.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</ol></li>
</ol></li>

====12.3.2.5. Alternative Approaches to Membrane Flashing====

<ol>
<li>The ''Contractor'' must assess the best approach to waterproofing any detail, when site conditions or construction sequencing require alternatives to heat-welding.
<li>When alternative methods are required,
<ol>
<li>curbs must be flashed by adapting the methods described in [[SBS_Roof_Systems_Standard#10.3.8.2. Pre-flashing | Article 10.3.8.2.]] of the "Standard for SBS-modified Bitumen Membrane Roof Systems", or by using other approaches that are equal or superior, and
<li>penetrations must be
<ol>
<li>incorporated into an adhered or self-adhered field membrane system, or
<li>flashed by using a pre-flashing method that is suitable for the penetration.
</li></ol>
</li></ol>
</li></ol>

====12.3.2.6. Liquid Membrane Flashing====
(See '''Figures 12.3.2.6.-A''' and '''12.3.2.6.-B''')

<ol>
<li>Any liquid flashing system shall
<ol>
<li>conform to the material requirements in [[#12.2.1.4. Liquid Membrane Flashing | Article 12.2.1.4.]],
<li>be compatible with the substrate to which it is applied,
<li>be applied to a properly prepared substrate, which must be clean, dry, free of contaminants, and primed, as required by the manufacturer in their published instructions,
<li>be applied within masked boundaries to produce clean, straight, plumb edges (accessory products may be exempt from this requirement only when masking is impracticable),
<li>be used only when permitted by the ''manufacturer'', and
<li>be applied in keeping with the requirements and limitations of this Article.
</ol></li>
<li>Liquid membrane flashing systems may not be used on plastic substrates.
<li>When liquid membrane flashing systems are required or specified, only two--component fleece-reinforced catalyzed polymethyl methacrylate (PMMA) and polyurethane methyl methacrylate (PUMA) liquid membrane flashing systems may be used
<ol>
<li>on the ''drainage plane'',
<li>where sheet membrane flashing may not be practical or even possible,
<li>to terminate the top edge of sheet membrane flashing,
<li>where resistance to contamination of sheet membrane is necessary,
<li>where abrasion resistance is required, or
<li>for sheet membrane reinforcement (i.e., at corners).
</ol></li>
<li>Two-component fleece-reinforced catalyzed polymethyl methacrylate (PMMA) and polyurethane methyl methacrylate (PUMA) liquid membrane flashing systems
<ol>
<li>may be used
<ol>
<li>where abrasion resistance is desirable, or
<li>where the ''Design Authority'' specifies its application.
</ol></li>
<li>shall be applied to ensure that
<ol>
<li>the rate of application conforms to the ''manufacturer's'' published instructions, unless superseded by this Standard,
<li>the base coating of catalyzed liquid membrane resin evenly and fully covers the masked area,
<li>the manufacturer’s reinforcement fleece is cut to cover the masked area, to within 4.76 mm (1/8”) of all edges,
<li>the fleece is fully embedded in, and saturated with, the based coating of resin, and
<li>the fleece is evenly and thoroughly coated with a second application of catalyzed liquid membrane resin, covering the masked area.
</ol></li>
</ol></li>
<li>Where a fleece-reinforced 2-component catalyzed polymethyl methacrylate (PMMA) liquid membrane flashing system is used to terminate sheet membrane on the vertical plane, the liquid membrane flashing system must overlap the sheet membrane, and it must extend onto the vertical substrate above the sheet membrane, by no less than 50.8 mm (2") ('''Figure 12.3.2.-B''').
<li>Fleece-reinforced 2-component catalyzed polymethyl methacrylate (PMMA) liquid membrane flashing system that is used as a substitute for sheet membrane flashing must be carried up a vertical plane above the ''finished system surface'' at least 203.2 mm (8”), and no less than 203.2 mm (8") onto the horizontal field plane (See '''Figure 12.3.2.6.-A'''| and '''Figure 12.3.2.6.-B''').
<li>Single-component polyurethane and silicon-based liquid membrane flashing ''system''
<ol>
<li>may be used
<ol>
<li>to coat galvanized flashings used in the water plane, provided the application follows the requirements in [[#12.3.2.2. Galvanized Penetration Flashings | Article 12.3.2.2., "Galvanized Penetration Flashings"]],
<li>to flash details more than 101.6 mm (4”) above the water plane, that cannot be sealed with sheet-type membranes, or
<li>to seal pre-curb dowels (see [[#14.3.2.7. Structures and Equipment | Article 14.3.2.7.]]).
</ol></li>
<li> must not be used in the ''drainage plane'', or to reinforce membranes against abrasion,
<li>must be applied in two cured coats, unless otherwise permitted in this Standard, and
<li>must be fleece-reinforced between coats where
<ol>
<li>the application is considered permanent,
<li>a change in plane (angle) occurs, or
<li>there is a joint between two supports and the liquid membrane must serve as a bridge.
</ol></li>
</ol></li>
<li>Accessory PMMA detailing products
<ol>
<li>shall not be used as a substitute for fleece-reinforced 2-component PMMA systems, where these are required or exclusively permitted,
<li>must be used at locations 101.6 mm (4”) or more above the ''finished system surface'', except where complex details, such as bolt heads, cannot be properly sealed with a fleece-reinforced 2-component PMMA system, and
<li> must not be used where movement is expected.
</ol></li>
</ol></li>
 
::{|
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 12.3.2.6.-A Application Requirements for PMMA on Roof Penetration''' Forming Part of Sentence 12.3.2.6.(4) (Click to expand illustration)
|-
| [[File:Figure 12.3.-B (Generic).jpg |link=https://rpm.rcabc.org/images/7/75/Figure_12.3.-B_%28Generic%29.jpg | 500 px]]
|}
 
::{|
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 12.3.2.6.-B Illustration of Various Liquid Membrane Flashing Applications''' {{hilite | Forming Part of Article 12.3.2.6. (Click to expand illustration)
|-
| [[File:Part 12 - Figure 12.3.2.6.-B.png|link=https://rpm.rcabc.org/images/9/92/Part_12_-_Figure_12.3.2.6.-B.png | 800 px]]
|}

====12.3.2.7. Railings, Ladders, and Other Attached Structures====
(See also Construction Detail [[SBS Railing | "Railing"]])

<ol>
<li>Fasteners installed to secure railings, ladders, and other structures to the vertical face of ''walls'' must be located at least 88.9 mm (3-1/2") above the ''finished system surface''.
<li>Railings, ladders, and other structures mounted on a waterproofed horizontal substrate that is part of the ''waterproofing assembly'' (i.e., on top of a ''parapet'') shall be fully flashed around each base with a fleece-reinforced liquid membrane flashing material, unless directed otherwise by a written Variance issued by the '''''Guarantor''''', using a product that is
<ol>
<li>suitable for use in the ''drainage plane'',
<li>applied in keeping with the requirements in [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6.]], and
<li>compatible with roofing membranes installed on the substrate.
</li></ol>
<li>Railings, ladders, and other structures shall not direct water into the building by means of weep holes or the method of fastening.
</li></ol>

<hr>
<div id=PART_13></div>

=Part 13 - Linear Metal Flashing=
==Section 13.1. Design==
===13.1.1. General===
====13.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====13.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Cleat'', also referred to as a "wind clip", is a long piece of sheet metal that is fastened to a solid substrate (usually structural) behind a ''linear metal flashing'', to hold it in place.
<li>''Drip edge'' means the bent (kicked-out) hemmed edge of a linear metal flashing, measuring at least 19.05 mm (3/4") and angled no more than 30° from vertical ("Architectural Sheet Metal Manual" published by the Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA), Sixth Ed.: p. 2.3); it is used to direct dripping water away from the face of the metal flashing or the materials it is protecting, such as a wall. A drip edge may be fabricated on any linear metal flashing but is commonly used on coping (parapet cap) and counterflashing (also see the Glossary for a colloquial use of the term).
<li>''Hemmed edge'' means an edge of a ''linear metal flashing'' that is folded onto itself (bent 180°), to render a smooth (not raw or sharp) finish (this is sometimes referred to as a "safety edge").
<li>''Linear metal flashing'' means flashings cut and shaped from flat metal stock, to redirect water at ''waterproofing system'' perimeters and edges, or to control the flow of water in valleys and drainage spillways. ''Linear metal flashings'' also protect waterproofing membranes from weathering and damage and provide an aesthetic finish to the ''waterproofing system''.
</li></ol>
</li></ol>

===13.1.2. Guarantee Term Requirements===
====13.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====13.1.2.2. Reserved====

===13.1.3. All Systems===
====13.1.3.1. Scope and Function====
(See also the "Architectural Sheet Metal Manual" published by the Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA))

<ol>
<li>''Linear metal flashings'' described in this Part and referenced elsewhere in this Standard
<ol>
<li>are considered necessary and integral to the scope of a ''project'' designed and constructed to qualify for a '''''RoofStar Guarantee''''',
<li>do not perform a waterproofing function and therefore must be specified for use over membrane flashing, or designed to shed water onto a waterproofing or water-shedding primary material,
<li>shall be new (reuse of any existing ''linear metal flashings'' is prohibited and may void the '''''Guarantee''''' (See [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2., "Limitations and Exclusions of Guarantee"]]), and
<li>shall be ''Contractor''-fabricated to suit the ''project'' requirements or shall be listed in [[Division_C | Division C]] as materials pre-engineered and manufactured by a metal supplier.
</li></ol>
<li>The requirements in this Part apply almost entirely to ''Contractor''-fabricated linear metal flashings; consequently, RoofStar-accepted pre-engineered products accepted as systems are exempt from the requirements in this Part for metal gauge, profile, and securement, unless expressly stated otherwise.
<li>''Linear metal flashings''
<ol>
<li>must be specified when UV-sensitive membranes require protection, or when membrane edges will otherwise be exposed to the sun, to water, or to physical damage, and
<li>may be specified to cover ''parapet'' caps, sleepers, or curbs
<ol>
<li>for aesthetic reasons, or
<li>to protect the membrane from damage resulting from maintenance (i.e., pressure washing of decks or pavers), or from foot traffic.
</li></ol>
</li></ol>
</li></ol>

====13.1.3.2. Information Required in Specifications====

<ol>
<li>{{hilite | Subject to the requirements in this Standard,|| 2021-February-7 }} the ''Design Authority'' must specify
<ol>
<li>metal type, finish, and gauge,
<li>seam types,
<li>length of flashings (if different from the requirements in this Part), and
<li>method of attachment (concealed or exposed fasteners).
</li></ol>
<li>Design drawings must detail metal flashing profiles desired for the ''project''.
</li></ol>

====13.1.3.3. Securement====

<ol>
<li>Securement of all ''linear metal flashings'' shall be specified in keeping with the application requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]
</li></ol>

====13.1.3.4. Gauge, Dimension Limitations, and Seams====

<ol>
<li>Gauge, dimensions, slope, and length of ''linear metal flashings'' must be specified to conform to the requirements in '''Table 13.1.3.4.-A''' and [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]], but shall not be less than 26-Gauge.
<li>Specified seam types shall conform to the requirements in '''Table 13.1.3.4.-B''' and [[#13.3.2.2. Seams | Article 13.3.2.2.]]
</li></ol>
 
::::::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Table 13.1.3.4.-A. Pre-finished Galvanized Steel Cap (Coping) Flashing (Gauge and Length Requirements)''' Forming Part of Sentence 13.1.3.4.(1).
|-
|}
:{| class="wikitable" style="text-align: left; margin-left: 20pt; margin-right: auto; border: none;"
|-
! Horizontal Span !! Minimum Slope !! Gauge !! Maximum Flashing Segment Length !! Seam Options
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | Up to 304.8 mm (12") || rowspan="2" style="vertical-align:centre;text-align:center;" | 2% || 26, 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | ≤ 3048 mm (120")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 304.8 - 914.4 mm (12" to 36") || rowspan="2" style="vertical-align:centre;text-align:center;" | 4% || 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | ≤ 3048 mm (120")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 914.4 mm (36") or greater || rowspan="2" style="vertical-align:centre;text-align:center;" | 6% || 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | ≤ 1219.2 mm (48")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | Up to 304.8 mm (12") || rowspan="2" style="vertical-align:centre;text-align:center;" | 2% || 24 || rowspan="6" style="vertical-align:centre;text-align:center;" |3048 mm (12"), as specified by a ''registered professional'' || S-lock or Standing Seam†
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 304.8 - 914.4 mm (12" to 36") || rowspan="2" style="vertical-align:centre;text-align:center;" | 4% || 24 || S-lock or Standing Seam†
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 914.4 mm (36") or greater || rowspan="2" style="vertical-align:centre;text-align:center;" | 6% || 24 || S-lock or Standing Seam†
|-
| 22+ || Butt Seams*
|}
::''*'' Ref. [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]
::† Seam type shall be determined by the ''registered professional'' but when the flashing exceeds 3048 mm (120”) in length and linear expansion or contraction will be greater than 6.35 mm (¼”), only S-locks or Butt Seams shall be used.

::::::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Table 13.1.3.4.-B. Pre-finished Galvanized Steel Vertical Flashing (Gauge and Length Requirements)''' Forming Part of Sentence 13.1.3.4.(2).
|-
|}

:::::{| class="wikitable" style="margin-left: 0pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:center;"
|-
! Vertical Face !! Gauge!! Maximum Flashing Segment Length !! Vertical Seam Options
|-
| Up to 152.4 mm (6") || 26 || ≤ 3048 mm (120") || S-lock
|-
| Up to 203.2 mm (8") || 24 || ≤ 3048 mm (120") || S-lock
|-
| Up to 304.8 mm (12") || 22+ || ≤ 3048 mm (120") || Butt Seams*
|-
| Up to 152.4 mm (6") || 24 || rowspan="3" style="vertical-align:centre;text-align:center;" | >3048 mm (120”), as specified by a ''registered professional'' || S-lock*†
|-
| Up to 203.2 mm (8") || 24 || S-lock*†
|-
| Up to 304.8 mm (12") || 22+ || S-lock or Butt Seams*†
|-
|}
::''*'' Ref. [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]
::† Seam type shall be determined by the ''registered professional'', but when the flashing exceeds 3048 mm (120”) in length and linear expansion or contraction will be greater than 6.35 mm (¼”), only S-locks or Butt Seams shall be used.

====13.1.3.5. Fit and Finish====

<ol>
<li>Fit and finish of all ''linear metal flashings'' shall conform to the requirements in [[#13.2.2. Fabrication and Finish | Subsection 13.2.2.]]
<li>''Drip edges'' are not required but are strongly recommended for ''linear metal flashings'' installed around the outside perimeter of a building, to protect ''wall'' finishes (Ref. [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1.]] for fabrication requirements).
<li>Stainless steel flashings and fasteners are recommended for use in environments where significant corrosion may occur (e.g., near salt-water coastlines) (See [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]] for stainless steel material requirements).
</li></ol>

====13.1.3.6. Cap Flashing, Counterflashing, and Reglet Flashing====

<ol>
<li>Cap (coping) flashings
<ol>
<li>are required for all ''parapets'' (including ''parapets'' on ''waterproofing assemblies'' that are adjacent to each other),
<li>are optional for ''control joints'' (area dividers) that are fully enveloped with waterproofing membrane (Ref. [[#10.3.6.2. Control Joints (Roof Dividers) | Article 10.3.6.2.]]), and
<li>are recommended on ''control joints'' (area dividers) where the membrane may be susceptible to abrasion or mechanical damage.
</li></ol>
<li>All linear metal cap (coping) flashing specified for ''parapets'' shall indicate securement to a solid substrate
<ol>
<li>at every seam, using S-locks or standing seam clips (Ref. [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]),
<li>beneath the outside vertical face of the flashing, using hidden clips (Ref. [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3.]]), and
<li>on the waterproofing side (inside) face of the flashing.
</li></ol>
<li>The use of exposed fasteners on the exterior face of cap (coping) flashing specified for ''parapets'' is not permissible.
<li>When the top surface of a ''wall'' exceeds 101.6 mm (4") in width, linear metal coping (cap) flashing must be specified with a minimum slope of 2% toward the waterproofing side of the ''parapet'', to promote drainage (drainage toward the exterior of a building is not recommended).
<li>All metal cap (coping) flashing must be designed with full, solid support.
<li>When the specified cap flashing material is thicker or heavier than 18-gauge steel or aluminum, or it exceeds the permissible weight or gauge ranges for copper or zinc flashings, the seam and securement design must be submitted to the '''''Guarantor''''' for review prior to tender (See [[#13.3.2.2. Seams | Article 13.3.2.2.]] concerning flat butt seams).
<li>Base metal flashings used to conceal wall materials or to restrain filtration materials and drainage boards must be fashioned to conform to [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1.]] and [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3.]]
</li></ol>

====13.1.3.7. Intersections with Other Assemblies====

<ol>
<li>Where a ''parapet'' intersects with a ''wall'', the union must be designed to direct water to the ''waterproofing system'', away from the outer surface of the ''wall'', using a metal saddle assembly in combination with the membrane requirements in [[#10.3.4.1. Parapets | Article 10.3.4.1.]] (Ref. [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3.]]).
</ol></li>

==Section 13.2. Materials==
(Ref. [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]] concerning limitations and exclusions for metal flashing.)

===13.2.1. Material Properties===
====13.2.1.1. Manufacturing and Supply====

<ol>
<li>''Linear metal flashings'' must be new, manufactured and supplied by the ''Contractor'' or by an Associate Member of the RCABC, and must conform to the requirements published in this Part.
</ol></li>

====13.2.1.2. Sheet Metal Grade and Gauge====

<ol>
<li>A mill certificate must be provided by the ''Contractor'' when requested by the ''Design Authority''.
<li>When stainless-steel metal flashings are specified, grade 304 stainless steel conforming to the requirements in Clause (3)(2) may be used in most applications but when flashings will be subject to regular or constant immersion in water (especially in a coastal environment), or to corrosive environments, the flashings should be manufactured from Grade 316L stainless steel conforming to the requirements below.
<li>The following minimum gauges and/or weights of sheet steel materials apply to all ''linear metal flashings'' (the reference standard for gauges is USS REV (metric in mm)):
<ol>
<li>'''Galvanized steel''': minimum 0.50 mm (0.0196", 26-gauge) galvanized steel sheet, conforming to ASTM A653 / A653M-06 CS Type B, Z275 (G90) coating. Thickness tolerance as per ASTM A924/A924M-06 ±0.08 mm (0.003") for sheet widths not exceeding 1524 mm (60").
<li>'''Stainless Steel Grade 304''': minimum 0.38 mm (0.014", 28-gauge) stainless steel, Grade 304, conforming to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”. Maximum thickness tolerance variation ± 0.04 mm (0.0015") based on 1219.2 mm (48") wide sheet (See [[Notes to GLW Standard#A-13.2.1.2.(3)(2) | Note A-13.2.1.2.(3)(2)]]).
<li>'''Stainless Steel Grade 316L''': minimum 0.38 mm (0.014", 28-gauge) stainless steel, conforming to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”.
<li>'''Aluminum-Zinc alloy-coated steel''': minimum 0.50 mm (0.0196", 26-gauge) aluminum-zinc alloy coated steel sheet, conforming to ASTM A792/A792M-06 CS Type B, AZM150 (AZ50) coating. Thickness tolerance as per ASTM A924/A924M-06 ±0.08 mm (0.003") for sheet widths not exceeding 1524 mm (60").
</li></ol>
<li>The following minimum gauges and/or weights of non-ferrous materials apply to all ''linear metal flashings'':
<ol>
<li>'''Aluminum''': minimum 0.80 mm (0.032", 20-gauge) aluminum sheet, utility quality to CSA HA Series - 1975, plain or embossed finish. Maximum thickness tolerance variation ± 0.06 mm (0.0025") based on 1219.2 mm (48") wide sheet.
<li>'''Copper''': minimum 0.56 mm (24-gauge; 0.0216", 16 oz.) copper sheet, cold rolled roofing copper to ASTM B370-81. Maximum thickness tolerance variation ± 0.09 mm (0.0035") based on 1219.2 mm (48") wide sheet.
<li>'''Zinc''': minimum 0.80 mm (0.031") zinc Sheet conforming to European standard EN 988-1996. Maximum thickness tolerance variation ± 0.03 mm (0.0012").
</li></ol>
<li>Where a ''waterproofing system'' adjoins and "Architectural Sheet Metal System", ''linear metal flashings'' must be fabricated from 24-gauge steel stock.
</li></ol>

====13.2.1.3. Fasteners====

<ol>
<li>Fasteners must be
<ol>
<li>threaded screws, friction-type pins (i.e., for masonry or concrete), plug (inserts), or rivets (where permitted),
<li>compatible with materials they contact,
<li>corrosion-resistant,
<li>specified by the ''Design Authority'', and
<li>appropriately sized, in both length and thread type, for the material to which they will be secured.
</li></ol>
<li>Nails are not acceptable as fasteners.
<li>Notwithstanding the requirements in Sentence (1), threaded fasteners used to secure linear metal flashings
<ol>
<li>in concealed locations must be at least No. 8, corrosion-resistant screw or expansion fastener with a low-profile head and must be compatible with both the metal flashing material and the substrate.
<li>in exposed locations must be at least No. 10., shall be gasketed (cladding screws), and must match the colour of the materials they fasten.
</li></ol>
<li>When pre-engineered ''linear metal flashing systems'' are specified, fasteners provided by the manufacturer must be used.
<li>Rivets shall be closed-end, dome-head type, and shall be used only for fastening together linear metal flashings.
</li></ol>

====13.2.1.4. Sealants====

<ol>
<li>Sealants shall be
<ol>
<li>non-hardening high-quality butyl or polyurethane,
<li>available in either gun grade or sealant tape form,
<li>suitable for exterior use and able to resist the effects of weathering, and
<li>compatible with, and able to adhere to, the materials to which they are applied.
</ol></li>
<li>Sealants shall conform to
<ol>
<li>CGSB 19-GP-5M, “Sealing Compound, One Component, Acrylic Base, Solvent Curing”,
<li>CAN / CGSB-19.13, “Sealing Compound, One Component, Elastomeric, Chemical Curing”,
<li>CGSB 19-GP-14M, “Sealing Compound, One Component, Butyl-Polyisobutylene Polymer Base, Solvent Curing”, or
<li>CAN / CGSB-19.24, “Multi-Component, Chemical Curing Sealing Compound”.
</ol></li>
</ol></li>

===13.2.2. Fabrication and Finish===
====13.2.2.1. Fabrication of Flashing====

<ol>
<li>Linear metal flashings must be new, must conform to the requirements published in this Part, and shall be manufactured and supplied
<ol>
<li>by the ''Contractor'',
<li>for the ''Contractor'' by another ''Contractor'' (RCABC Member), or
<li>by an ''Associate Member'' of the RCABC.
</ol></li>
<li>Unless expressly accepted by the '''''Guarantor''''', all linear metal flashing fabricated by the ''Contractor'' shall conform to the requirements in this Part.
{{strike| Specified drip edges must be broken (bent) outward from the face of the flashing by at least 30° and shall measure at least 19.05 mm (3/4”), extending from the break. || 2025-October-22 }}
<li>All ''linear metal flashing'', except those that are pre-engineered and expressly accepted by the RGC,
<ol>
<li>must be hemmed, and
<li>shall conform to the minimum requirements in '''Table 13.1.3.4.-A''' and '''13.1.3.4.-B.'''
</ol></li>
<li>Slotted holes, to allow for the coefficient of expansion, are recommended for any length of linear metal flashing, where gasketed screws are used to secure it (See '''Figure 13.2.2.1.-A'''. Also see [[Notes to GLW Standard#A-13.2.2.1.(4)|Note A-13.2.2.1.(4)]]).
<li>The vertical leg of any ''linear metal flashing'' that overlaps roofing material
<ol>
<li>must be at least 76.2 mm (3") in height, exclusive of the drip or hemmed edge, when measured between each break,
<li>and shall overlap the edge of a membrane (i.e., membrane flashing on a wall) by at least 25.4 mm (1”).
</ol></li>
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.2.2.1.-A Roof-side face of cap flashing showing slotted hole for gasketed fastener''' Forming Part of Article 13.2.2.1. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.2.2.1.-A.png |link=https://rpm.rcabc.org/images/b/bb/Part_13_-_Illustration_-_Figure_13.2.2.1.-A.png | 600 px]]
|}

<li>All hemmed ''drip edges'' shall be broken (bent) outward from the face of the flashing by at least 30° (See '''Figure 13.2.2.1.-B''').
<li>The fabrication of linear metal flashings longer than 3048 mm (120”) is permissible, provided
<ol>
<li>galvanized steel flashings are manufactured from metal stock 24-gauge or heavier, and
<li>the method of securement, regardless of the material, allows for the coefficient of expansion (See [[Notes to GLW Standard#A-13.2.2.1.(4)| Note A-13.2.2.1.(4)]].
</ol></li>
<li>All Cap (coping) flashing shall be fabricated with a hemmed drip edge at the bottom of the outside vertical face, to receive the cleat (wind clip) (See '''Figure 13.2.2.1.-B''').
<li>Cleats (wind clips) must be fabricated with a hooked edge that both matches the angle of the cap flashing drip edge and will fit inside (be enclosed by) it (See '''Figure 13.2.2.1.-B''').
<li>When the length of cap flashing is equal to or less than 3048 mm (120”), the length of the hemmed drip edge shall be enough to enclose at least 12.7 mm (1/2”) of the cleat (wind clip) (See '''Figure 13.2.2.1.-A'''; also see[[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Clause 13.3.2.3.(2)(1)]]).
<li>When cap flashing is longer than 3048 mm (120”),
<ol>
<li>the cleat (wind clip) for the outside face of a parapet must be
<ol>
<li>continuous (discontinuous cleats (wind clips) are not permitted), and
<li>fabricated from compatible flat metal stock, two gauges heavier than the cap flashing,
</ol></li>
<li>the length of the hemmed drip edge shall be enough to enclose at least 15.88 mm (5/8”) of the hidden clip hook,
<li>the waterproofing-side face of cap flashing must be fabricated to allow for the coefficient of expansion (See [[Notes to GLW Standard#A-13.2.2.1.(4)| Note A-13.2.2.1.(4)]]:
<ol>
<li>If gasketed screws are specified, the flashing must be slotted, based on the engineered securement requirements (See [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3.]]).
<li>If a cleat (wind clip) is specified, the cleat (wind clip) and the drip edge of the flashing shall conform to the requirements for cleat (wind clip) securement on the outside face of the parapet (using hidden clips, which can allow for unfettered expansion and contraction, is considered a best practice);
</ol></li>
and
<li>seams joining lengths of cap flashing together shall conform to the engineered requirements for the flashing system (See '''Table 13.1.3.4.-A''' and '''Table 13.1.3.4.-B''').
</ol></li>
<li>With the exception of ''drip edges'', any break in the vertical face of a linear metal flashing to direct water away from the building shall be at least 30° downward (See '''Figure 13.2.2.1.-B''').
 
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.2.2.1.-B Counter-flashing and cap flashing fabrication requirements''' Forming Part of Article 13.2.2.1. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.2.2.1.-B.png|link=https://rpm.rcabc.org/images/f/fd/Part_13_-_Illustration_-_Figure_13.2.2.1.-B.png | 700 px]]
|}

<li>Base flashing must be fabricated with a drip edge or a flat hemmed edge that, when installed, shall be at least 25.4 mm (1”) above the filtration and drainage course of an insulated ''waterproofing assembly'' or ''overburden'' (See '''Figure 13.3.2.3.-E''').
<li>Metal edge flashing must be fabricated with
<ol>
<li>a flange measuring no less than 101.6 mm (4") in width,
<li>a vertical drop and hemmed drip edge at least 50.8 mm (2"), and (when transitioning to a lower ''water-shedding systems'')
<li>a sloped drop of no less than 101.6 mm (4").
</ol></li>
<li>Metal edge flashing may be constructed with or without an upstand at the outside edge (Edge flashing intended as a drainage edge may perform best without an upstand).
</ol></li>

====13.2.2.2. Pre-painted Finishes====

<ol>
<li>When a painted finish on ''linear metal flashing'' is specified, only SMP and PVDF pre-painted finishes are acceptable.
<li>Where ''Architectural Metal Roofing'' is installed, adjoining ''linear metal flashing'' must have the same finish as the metal panels.
</ol></li>

==Section 13.3. Application==
===13.3.1. Guarantee Term Requirements===
====13.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====13.3.1.2. Reserved====

===13.3.2. All Systems===
====13.3.2.1. General Requirements for Linear Metal Flashing====

<ol>
<li>RoofStar-accepted pre-engineered securement ''systems'' must be secured according to the ''manufacturer’s'' specifications.
<li>All cap (coping) flashings and other ''linear metal flashings'' subjected to wind loads on ''parapets'', roof dividers, firewalls, or any other vertical structure, must be secured to resist displacement by wind load.
<li>All ''linear metal flashing'' installed over an organic substrate (i.e., wood) shall be separated from the substrate with a suitable separation material (i.e., self-adhered bituminous membrane used as eave protection in a ''water-shedding system'').
<li>Unless otherwise provided for in this Part, mechanical fasteners used to secure ''linear metal flashing'' or their clips
<ol>
<li>shall conform to the fasteners requirements in [[#13.2.1.3. Fasteners | Article 13.2.1.3.]],
<li>shall be spaced no more than 304.8 mm (12”) O.C.,
<li>shall be firmly fastened, without distorting secured materials,
<li>must penetrate the substrate as specified in the screw manufacturer’s published minimum values, but shall nevertheless penetrate
<ol>
<li>through the back surface of steel framing at least 19.05 mm (3/4"),
<li>into or through plywood so that screw threads engage its full thickness, excluding the unthreaded tip, and
<li>into solid substrate (i.e., dimensional lumber or concrete) at least 25.4 mm (1"), and
<li>must be installed at least 88.9 mm (3-1/2") above the ''finished system surface''.
</li></ol>
</li></ol>
<li>Canted edge metal flashing may be mechanically fastened from the outside face but shall not be face-fastened on the waterproofing side of the flashing.
<li>Sealants must be tooled to positively shed water.
</li></ol>

====13.3.2.2. Seams====
(The requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1., "General Requirements for Linear Metal Flashing"]], shall be read together with the following requirements. See also [[#13.1.3.4. Gauge, Dimension Limitations, and Seams | Article 13.1.3.4.]])

<ol>
<li>RoofStar-accepted pre-engineered ''linear metal flashing'' may be joined together using seams specified for the accepted flashing.
<li>All ''linear metal flashing'' that is not pre-engineered must be seamed together following the requirements set out in this Article.
<li>All seams must allow for metal expansion and contraction.
<li>The seam and securement design must be approved by the '''''Guarantor''''' when the specified cap flashing material
<ol>
<li>is steel or aluminum, and the material is thicker or heavier than 18-gauge, or
<li>is copper and zinc, and the material thickness or weight exceeds the weight or gauge requirements in [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]]
</li></ol>
<li>'''Straight (linear) joints''' between lengths of ''linear metal flashing'' must be fully seamed using only an Standing Seam ('''Figure 13.3.2.2.-A''') or S-Lock ('''Figure 13.3.2.2.-B'''), but this requirement does not apply to
<ol>
<li>flashing fashioned from 22-gauge metal (or heavier), or
<li>the vertical face of any flashing that is concealed by a ''wall assembly'', counterflashing, or equipment flange, in which case the vertical joint may be lap-seamed, provided the overlap
<ol>
<li>is no less than 101.6 mm (4”) when fully caulked in the lap, or
<li>is no less than 152.4 mm (6”) when installed without caulking in the lap.
</li></ol>
</li></ol>
<li>The top face (horizontal plane) of flashings that intersect at a corner (i.e., coping flashing) must be joined with a standing seam.
<li>Where drip edges meet at an outside corner, the cut edges of the mitred joint must be mechanically connected (Closed with a "rat tail").
<li>When the face of vertically oriented flashing forms an '''outside corner''', and the height of the flashing
<ol>
<li>is greater than 101.6 mm (4”), the two flashings must be joined using only a standing seam.
<li>is 101.6 mm (4”) or less, the two flashings must be joined using
<ol>
<li>a standing seam,
<li>an S-lock, or
<li>a lap joint, but the drip edges must be mechanically connected (Closed with a "rat tail").
</li></ol>
</li></ol>
<li>When the face of vertically oriented flashing forms an '''inside corner''', and the height of the flashing
<ol>
<li>is greater than 101.6 mm (4”), the two flashings must be joined using only a standing seam.
<li>is 101.6 mm (4”) or less, the two flashings must be joined using
<ol>
<li>a standing seam, or
<li>a flat overlapped seam.
</li></ol>
</li></ol>
<li>Sealant applied to S-lock or standing seams is not a requirement in this Standard, but when it is specified
<ol>
<li>the sealant must be applied along the full length of the seam, and
<li>any sealant that extrudes from the seam during the seaming process must be removed and discarded (See [[#1.3.2.2. Workmanship | Article 1.3.2.2., "Workmanship"]]).
</li></ol>
<li>'''Standing seams''' (See '''Figure 13.3.2.2.-A''') must incorporate clips when the seam is longer than 101.6 mm (4”), and the clips must be
<ol>
<li>fabricated from flat metal stock 24-gauge or heavier,
<li>at least 38.1 mm (1-1/2”) wide,
<li>spaced apart from each other no more than 203.2 mm (8”) O.C.,
<li>embedded in an acceptable sealant, and
<li>secured with at least 2 acceptable low-profile flat head screws.
</li></ol>

 
::{|
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.2.-A Standing Seam''' Forming Part of Sentence 13.3.2.2.(5) (Click to expand illustration)
|-
| [[File:MF - Standing Seam.png | link=https://rpm.rcabc.org/images/a/a3/MF_-_Standing_Seam.png | 500 px]]
|}

<li>'''S-locked seams''' (See '''Figure 13.3.2.2.-B''') must be secured through flashing tab (leaf) with at least one (1) acceptable low-profile flat head screw when the seam is longer than 101.6 mm (4”), but fasteners must not be spaced more than 203.2 mm (8”) O.C.
 
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.2.-B S-Lock, Double''' Forming Part of Sentence 13.3.2.2.(11) (Click to expand illustration)
|-
| [[File:MF - S-Lock, Double.png | link=https://rpm.rcabc.org/images/b/b6/MF_-_S-Lock%2C_Double.png | 500 px]]
|}

<li>'''Flat butt seams''' (See '''Figures 13.3.2.2.-C''' and '''13.3.2.2.-D''')
<ol>
<li>are permissible only for cap (coping) flashings, and only when the flashing is fabricated from steel or aluminum ranging in thickness from 22-Gauge to 18-Gauge (the same applies to the equivalents for copper and zinc sheet material, by gauge or weight), and
<li>must have a hemmed front edge fabricated to hook onto a supporting saddle.
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.2.-C Flat butt seams''' {{hilite | Forming Part of Article 13.3.2.2. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.2.-C.png|link=https://rpm.rcabc.org/images/f/f0/Part_13_-_Illustration_-_Figure_13.3.2.2.-C.png | 600 px]]
|}

::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.2.-D Flat butt seams''' {{hilite | Forming Part of Article 13.3.2.2. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.2.-D.png|link=https://rpm.rcabc.org/images/9/92/Part_13_-_Illustration_-_Figure_13.3.2.2.-D.png | 600 px]]
|}

<li>The saddle for flat butt seams (See '''Figures 13.3.2.2.-C''' and '''13.3.2.2.-D''') must be
<ol>
<li>manufactured from the same material as the flashing,
<li>formed to match the profile of the cap flashing,
<li>fabricated with a hook along the front face,
<li>secured to the parapet with screws,
<li>installed to underlap the butt joint by at least 101.6 mm (4”) on either side,
<li>seated in two parallel beads of un-tooled sealant or butyl tape, which must be applied between the saddle and flashing, on either side of the butt joint, to all three adjoining faces, and
<li>secured to the cap flashing along both faces of the parapet (See [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]).
</li></ol>
</li></ol>

====13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing====
(The requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1., "General Requirements for Linear Metal Flashing"]], shall be read together with the following requirements)

<ol>
<li>Cap (coping) flashings must be
<ol>
<li>solidly and fully supported,
<li>separated from organic materials (i.e., wood) with roofing membrane, and
<li>joined using standing seams or S-locks (Ref. [[#13.3.2.2. Seams | Article 13.3.2.2.]]).
</li></ol>
<li>In addition to the above requirements, cap (coping) flashing installed on ''parapets''
<ol>
<li>must be secured to the outside face of the ''parapet'' with a cleat (wind clip) that hooks into the ''drip edge'' or hem of the cap flashing (See [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1., "Fabrication"]]; see also '''Figure 13.3.2.3.-A''').
<li>shall be secured along the roof-side of the ''parapet'' using either cleats (wind clips) or cladding fasteners (the method used shall be specified by the ''Design Authority'' or, when required, by a ''registered professional''), and
<li>shall not be secured to the outside face of a ''parapet'' with exposed fasteners.
</li></ol>
<li>Cleats (wind clips) shall be secured to the vertical face of a ''parapet'' and shall not be mechanically attached to the top face unless otherwise permitted in this Standard or by a written Variance from the '''''Guarantor'''''.
<li>Where cleats (“wind clips”) are required, they must
<ol>
<li>conform to the fabrication requirements in [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1.]], and
<li>be fastened as close to the bottom edge (hook) as practical but must not be fastened further than a maximum of {{hilite | 25.4 mm (1") from the bottom edge (hook).
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.3.-A General requirements for cap flashing securement''' Forming Part of Article 13.3.2.3. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.3.-A.png|link=https://rpm.rcabc.org/images/b/b9/Part_13_-_Illustration_-_Figure_13.3.2.3.-A.png | 600 px]]
|}
 
<li>The securement of ''parapet'' cap (coping) flashings longer than 3048 mm (10’) shall conform to stamped, engineered shop drawings produced by a ''registered professional'' retained by the ''Contractor''; all shop drawings shall form part of the submittal package required in [[#1.3.2.4. Contractor Submittals | Article 1.3.2.4., “Contractor Submittals”]].
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.3.-B Spacing of gasketed fasteners used on roof-side face of cap flashing''' Forming Part of Article 13.3.2.3. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.3.-B.png|link=https://rpm.rcabc.org/images/d/d7/Part_13_-_Illustration_-_Figure_13.3.2.3.-B.png | 600 px]]
|}
 
<li>Cap (coping) flashings installed on ''control joints'' (area dividers) and fire separation ''walls'' (Ref. Article 10.3.4.4. of the applicable ''waterproofing roof'' Standard) shall conform to the requirements in Sentence (2), and
<ol>
<li>may be face-fastened, provided the area divider or fire separation ''wall'' is less than 1 m (39") tall, but
<li>shall be secured with hidden clips on both sides when the area divider or fire separation ''wall'' exceeds a height of 1 m.
</li></ol>
<li>When using exposed screws to secure cap (coping) flashing is permissible, screws shall be located no more than 25.4 mm (1") above the break for the ''drip edge'' and provision shall be made for metal expansion and contraction (See [[Notes to GLW Standard#A-13.2.2.1.(4) | Note A-13.2.2.1.(4)]] and '''Figure 13.3.2.3.-C''').
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.3.-C Securement of cap flashing on exterior face of parapet wall''' Forming Part of Article 13.3.2.3. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.3.-C.png|link=https://rpm.rcabc.org/images/3/30/Part_13_-_Illustration_-_Figure_13.3.2.3.-C.png | 600 px]]
|}
 
<li>Exposed fasteners used to secure the waterproofing side face of cap flashing longer than 3048 mm (10’) shall be equally spaced along the length of the flashing but shall not be further apart than 762 mm (30”).
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.3.-D Securement of cap flashing on waterproofing side of parapet wall''' Forming Part of Article 13.3.2.3. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.3.-D.png|link=https://rpm.rcabc.org/images/0/01/Part_13_-_Illustration_-_Figure_13.3.2.3.-D.png | 600 px]]
|}
 
<li>'''Continuous concealed clips''' must be attached with fasteners spaced nor more than 304.8 mm (12") O.C.
<li>'''Discontinuous concealed clips''' must
<ol>
<li>consist of a single clip, centered between the seams of each length of metal flashing,
<li>measure at least 1/3 of the length of flashing it will secure but shall not be less than 101.6 mm (4") in length, and
<li>be fastened with screws spaced no more than 304.8 mm (12") O.C.
</li></ol>
<li>Fasteners used to secure any cap, counter, or base flashing must be evenly spaced between seams along each length of flashing, and shall be
<ol>
<li>no fewer than three (3) fasteners for every 3048 mm (120") length of metal flashing ('''Figures 13.2.3.3.-B''' and '''13.3.2.3.-D'''), or
<li>two (2) fasteners for every 2438.4 mm (96") length of metal flashing.
</li></ol>
<li>When cap (coping) flashings span widths greater than 304.8 mm (12”), and a flat butt seam is specified, the cap flashing must be riveted to the saddle to ensure adequate securement, and the rivets must be no further apart than 203.2 mm (8”) (See '''Figures 13.3.2.2.-A''' and '''13.3.2.2.-B''').
<li>Parapets that intersect a wall must be flashed with a metal saddle flashing, as shown in the "Construction Details for Linear Metal Flashings" ([[Division_D | Division D]]).
<li>When the outside face of a cap flashing is concealed by a wall assembly, only the outside face may be lap-seamed, provided the overlap is no less than 101.6 mm (4”) and the overlapping metal is embedded in mastic.
<li>Counterflashing must be secured to the vertical face, with fasteners or a reglet.
<li>Counterflashing and termination bars installed as primary securement or protection of membrane flashing
<ol>
<li>must be hemmed at the top edge and bent (broken) outward from the face of the wall by at least 45°, to form a groove for sealant (The hem shall measure at least 15.88 mm (5/8”) when measured from the break),
<li>shall be attached to the substrate with fasteners spaced no more than 304.8 mm (12”) O.C., and
<li>must be sealed along the top groove with a continuous bead of acceptable sealant, tooled to shed water away from the wall.
</li></ol>
<li>A second counterflashing (to cover a term bar or primary counterflashing)
<ol>
<li>applied as a “surface reglet” must be hemmed, broken, and sealed, as described above in this Article, and
<li>must be secured with fasteners spaced no more than 304.8 mm (12”) O.C., but this spacing may be increased to no more than 609.6 mm (24”) O.C., provided the flashing maintains continuous contact with the substrate (See [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]).
</li></ol>
<li>Base flashings
<ol>
<li>must be installed so that the bottom of a drip or hemmed edge is kept at least 25.4 mm (1") above the filtration layer and drainage course of an insulated ''waterproofing assembly'' or any ''overburden'' (see '''Figure 13.3.2.3.-E.'''),
<li>must be secured with fasteners spaced no more than 304.8 mm (12”) O.C., and
<li>may be fashioned as one piece, or as a 2-piece flashing that includes a lower, detachable segment to facilitate ''waterproofing system'' maintenance.
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.3.-E Base metal wall flashing''' Forming Part of Article 13.3.2.3. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.3.-E.png|link=https://rpm.rcabc.org/images/7/7b/Part_13_-_Illustration_-_Figure_13.3.2.3.-E.png | 800 px]]
|}

<li>''Linear metal flashing'' secured in a ''reglet'' (cut groove) must be
<ol>
<li>installed above the membrane flashing,
<li>inserted into the ''reglet'' at least 12.7 mm (1/2”),
<li>friction-fitted within the ''reglet'' or secured on the exposed face with an acceptable fastener, and
<li>sealed with a continuous bead of tooled gunnable sealant.
</li></ol>
<li>Where parallel and overlapping reglet flashings are used, the joints between flashing segments must be offset by at least 304.8 mm (12”), except at corners.
</li></ol>

====13.3.2.4. Reserved====

====13.3.2.5. Reserved====

<hr>
<div id=PART_14></div>

=Part 14 - Waterproofing as a Platform=
==Section 14.1. Design==
(This Part covers the design and installation requirements for ''waterproofing assemblies'' that support an ''overburden'', which may be structurally supported or directly supported by the ''waterproofing assembly'')

(See [[Notes to GLW Standard#A-14.1. | Note A-14.1.]])

===14.1.1. General===
====14.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====14.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Overburden'' means any material, structure or item of equipment that is placed on top of (but not fastened to or through) a ''waterproofing system'' (roof, or at grade). Gravel or pavers are considered ''overburden'' when they do not function as securement for the ''waterproofing assembly''.
<li>''System Coverings'' means (without limitation) gravel, wearing surfaces, landscaping, pavers, cast-in-place concrete, and rubberized surfaces, broadly covering and directly superimposed on the ''waterproofing assembly'' (See [[Notes to GLW Standard#A-14.1. | Note A-14.1.1.2.(1)]]).
<li>''Structures and Equipment'' means structurally supported or portable objects including (without limitation) wood or composite decks and walkways, planters, "amenity spaces" (inclusive of furnishings, hot tubs, gazebos, pergolas, and play areas), nets and wind screens, photovoltaics, satellite equipment, light standards, lightning rods, sculptures, pools, and other water features.
</li></ol>
</li></ol>

===14.1.2. Guarantee Term Requirements===
====14.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====14.1.2.2. Reserved====

====14.1.2.3. Reserved====

===14.1.3. All Systems===
====14.1.3.1. Coverage and Limitations====

<ol>
<li>Coverage under the '''''RoofStar Guarantee''''' shall be as described in [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]]
</li></ol>

====14.1.3.2. Loads====

<ol>
<li>The building structure must be designed to support any live loads specified by the Code having jurisdiction, including loads from any ''system covering'', amenity space, structure, or live loads superimposed upon the ''waterproofing assembly''.
<li>Structural supports (i.e., curbs) should be considered to bear heavier dead loads, to resist ''specified wind loads'', or to secure the equipment during seismic events.
</li></ol>

====14.1.3.3. Securement of System Coverings, Structures, and Equipment====

<ol>
<li>The ''Design Authority'' is responsible for specifying the appropriate securement design of ''system coverings'', structures, and equipment, to resist ''specified wind loads''.
<li>Where structural securement is desirable or required,
<ol>
<li>structural supports must be fully waterproofed (curbs, sleepers, posts) and
<li>the superimposed structure or equipment must be secured to the structural support at least 203.2 mm (8”) above the ''drainage plane'' (See [[#Part 12 - Penetrations and Curbs | Part 12 - Penetrations and Curbs]], and [[#Part 3 - Securing the Roof Assembly | Part 3 - Securing the Roof Assembly]]).
</li></ol>
</li></ol>

====14.1.3.4. Design for Repairs and Renewal====

<ol>
<li>Each design should, without limitation, include consideration for
<ol>
<li>the inevitability of ''waterproofing system'' repairs or replacement,
<li>access for maintenance, and
<li>material removal, storage, and replacement logistics.
</li></ol>
</li></ol>

====14.1.3.5. Waterproofing Membranes====

<ol>
<li>Membranes must be selected for their ability to resist accidental puncture by human activity on the ''waterproofing assembly''; except for hot fluid-applied rubberized asphalt, the minimum puncture resistance must be at least 400 N (See Table 9.2.1.1. in [[#9.2.1.1. Membrane Composition, Thickness, and Selection | Article 9.2.1.1.]]).
</li></ol>

====14.1.3.6. Membrane Protection====

<ol>
<li>Membranes must be protected from damage incurred
<ol>
<li>during the construction of a building,
<li>from normal use and occupancy of the ''deck'' protected by the ''waterproofing system'', and
<li>from maintenance of any installation on top of a ''waterproofing system'', after the building has been commissioned.
</li></ol>
<li>Where membranes installed on vertical surfaces may be damaged from foot traffic or shifting coverings, they must be protected (i.e., with base metal flashing; ref. [[#13.1.3.6. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.1.3.6.]]).
</li></ol>
</li></ol>

====14.1.3.7. Membrane Integrity Testing and Electronic Leak Detection====
(See [[#1.1.3.3. Membrane Integrity Testing | Article 1.1.3.3.]] and [[#1.1.3.4. Electronic Leak Detection | Article 1.1.3.4.]])

====14.1.3.8. Drainage====

<ol>
<li>''Waterproofing assemblies'' that will be covered with ''overburden'', including amenity spaces or equipment, must promote unimpeded drainage of storm or irrigation water.
<li>Where a ''system covering'' material naturally drains (i.e., gravel), no additional drainage design is required, but when it does not naturally drain, or when the ''system covering'' may introduce a “vapour closed” condition, the system shall conform to the requirements in [[#7.1.6.2. Drainage Mats and Filter Fabric | Article 7.1.6.2.]]
<li>''Overburden'' must be contained with drain guards, rigid barriers, and filter fabric (See also [[#11.3.2.3. Drain Protection Against Blockage | Article 11.3.2.3.]]).
<li>To facilitate the adequate movement of water and minimize or prevent damming when non-structural supports are oriented perpendicular to (across) the direction of drainage, the design must
<ol>
<li>specify shorter supports, to a maximum length of 1219.2 mm (48"), and
<li>incorporate drainage mats beneath supports longer than 1219.2 mm (48") in any direction.
</li></ol>
<li>Equipment installed on structural supports, or on top of the ''waterproofing system'', must be spaced or located to promote access to ''drains'', ease of maintenance, and worker or occupant safety.
</li></ol>

====14.1.3.9. Filter Fabric====

<ol>
<li>Filter fabrics are required when the ''waterproofing assembly'' supports
<ol>
<li>any ''overburden'', including landscaping,
<li>sand and other fine materials,
<li>gravel with a diameter less than 12.7 mm (1/2”),
<li>wet mortar or concrete, or
<li>XPS insulation above the membrane (See [[Notes to GLW Standard#A-14.1.3.9. | Note A-14.1.3.9.]]).
</li></ol>
</li></ol>

====14.1.3.10. Decorative Stone (Aggregate Rock) Covering====
(See [[Notes to GLW Standard#A-14.1.3.10. | Note A-14.1.3.10.]])

<ol>
<li>When smooth stone (aggregate rock) is specified as the ''system covering'' (different from ballast),
<ol>
<li>only washed gravel may be used, and
<li>the design must include gravel guards around ''drains''.
</li></ol>
<li>When the aggregate rock used as a ''system covering'' is crushed, or is smaller than 12.7 mm (1/2”),
<ol>
<li>a geotextile protection layer must be installed immediately above the waterproofing membrane, and
<li>the crushed aggregate must be deep enough to hold the geotextile protection layer in place.
</li></ol>
</li></ol>

====14.1.3.11. Wearing Surfaces====
(See also [[#9.1.3.4. Membrane Protection | Article 9.1.3.4.]] concerning wearing surfaces and drainage requirements)

<ol>
<li>Any wearing surface may be installed on an ''uninsulated assembly'', provided
<ol>
<li>the wearing surface does not bond with or touch the field waterproofing membrane or membrane flashing, and
<li>drainage of storm or irrigation water is not impeded.
</li></ol>
<li>When a wearing surface is specified,
<ol>
<li>it must incorporate measures to protect the waterproofing membrane from damage,
<li>perimeter membranes and penetrations must be protected from abrasion by the wearing surface,
<li>the design must provide a drainage space below the wearing surface measuring at least 12.7 mm (1/2”) in depth, and
<li>the design must provide a vertical drainage gap between the wearing surface and any openings.
</li></ol>
<li>Accessible wearing surfaces that permit relatively easy access to the waterproofing membrane, for serviceability and repairs, are strongly recommended.
<li>When cast-in-place concrete is specified as the wearing surface (See [[Notes to GLW Standard#A-14.1.3.11. | Note A-14.1.3.11.]]), the design must conform to the other requirements in this Article, and the membrane, including membrane flashing, must be kept separate from the concrete with
<ol>
<li>a bond-breaking material, such as a proprietary drainage mat or XPS insulation, and
<li>filter fabric or a barrier material acceptable to the membrane manufacturer, able to prevent the concrete slurry from reaching the membrane.
</li></ol>
<li>Scoring solid cast-in place concrete protection slab (split-slab) and asphalt paving wearing courses, using straight surface score lines (indents) spaced no more than 2 m (78-3/4”) apart, formed in a grid pattern (squares, rectangles, diamonds, etc.), is recommended to facilitate cutting for removal of wearing course sections, to locate possible breaches in membranes; the casting and scoring of concrete wearing courses is the work of others).
</li></ol>

====14.1.3.12. Reserved====

====14.1.3.13. Structures and Equipment====

<ol>
<li>Non-structural installations superimposed on a ''waterproofing assembly'' (See '''Figure 14.1.3.13.-A''')
<ol>
<li>are recommended for smaller installations, to
<ol>
<li>minimize the number of penetrations, curbs, or sleepers necessary for structural securement,
<li>eliminate possible weak points in the ''waterproofing system'', where a leak may occur,
<li>avoid dedicated mechanical drainage, and
<li>simplify removal of materials when membrane repairs are required.
</li></ol>
<li>must take into account inevitable ''waterproofing system'' renewal (see [[Notes to GLW Standard#A-14.1.3.13. | Note A-14.1.3.13.]]),
<li>shall be designed for stability and able to resist movement, including seismic movement, but shall not be anchored into the ''waterproofing system'',
<li>must be placed on an appropriate protection layer or supported by pedestals, pavers, or other means of distributing weight and point loading, or placed on
<ol>
<li>a suitable drainage layer conforming to [[#14.2.1.4. Drainage Materials | Article 14.2.1.4.]], and
<li>an appropriate protection layer, and
</li></ol>
<li>may be placed on an insulated ''waterproofing system'' provided the insulation will support all anticipated dead loads, live loads and point loads (See [[#14.1.3.2. Loads | Article 14.1.3.2., "Loads"]]).
</li></ol>
<li>When “structural” ''walls'', planters, equipment pads, and other installations are
<ol>
<li>'''cast-in-place concrete''' without a pre-curb, they may be formed, reinforced, and poured directly on the slab, before it is waterproofed, but they must then be fully enveloped with waterproofing membrane (See '''Figure 14.1.3.13.-B''').
<li>'''cast-in-place concrete''' and are formed, reinforced, and poured over a pre-curb as described and required in this Article (See '''Figure 14.1.3.13.-C'''),
<ol>
<li>the pre-curb must be fully enveloped with waterproofing membrane, as part of the primary waterproofing, and
<li>the inside of planter ''walls'' must be sealed with waterproofing membrane as required in [[#14.3.2.7. Structures and Equipment | Article 14.3.2.7.]]
</li></ol>
<li>'''masonry''' (See '''Figure 14.1.3.13.-D'''), they must be anchored to the structural ''deck'' with internal reinforcement but may be waterproofed using either of the methods described for cast-in-place elements.
<li>'''pre-cast''', they must be secured
<ol>
<li>to a pre‐curb that is continuously waterproofed as a continuation of the primary waterproofing membrane, or
<li>to structural supports that are waterproofed in keeping with the requirements in [[#Part 12 - Penetrations and Curbs | Part 12]].
</li></ol>
</li></ol>
<li>When concrete ''walls'' or structures are constructed without a pre-curb, all concrete surfaces must be fully and continuously enveloped with the primary waterproofing membrane (See also [[Guarantee#3.2.1.3. Excluded Causes of Leaking | Division A, Article 3.2.1.3. Excluded Causes of Leaking]]).
<li>Pre‐curbs must be
<ol>
<li>at least 101.6 mm (4") in height above the ''drainage plane'' of the highest adjacent ''waterproofing assembly'' (See [[Notes to GLW Standard#A-14.1.3.13.(4) | Note A-14.1.3.13.(4))]],
<li>completely enveloped with fully adhered acceptable membrane flashing (including all faces of drainage knock‐outs),
<li>reinforced with dowels epoxied into the pre-curb (see [[#14.3.2.7. Structures and Equipment | Article 14.3.2.7.]]), and
<li>properly waterproofed around dowels in their final position, using
<ol>
<li>a 2-component catalyzed polymethyl methacrylate (PMMA) or polyurethane methyl methacrylate (PUMA) reinforced liquid membrane flashing system, or
<li>two cured coats of an RGC-accepted polyurethane or silicon-based single-component liquid flashing system (See [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6., "Liquid Membrane Flashing"]]).
</li></ol>
</li></ol>
<li>Every planter design must be designed to drain water out of the planter.
<li>Structural planters that adjoin
<ol>
<li>an uninsulated ''waterproofing assembly'' may be drained with
<ol>
<li>a plumbed mechanical ''drain'', or
<li>drainage knock-outs in the pre-curb ''wall'', which should be wide enough to allow for the free flow of water over or past of the membrane flashing plies.
</li></ol>
<li>an insulated ''waterproofing assembly'' shall be drained by only plumbed mechanical drains; knock-outs through a pre-curb are not permissible.
</li></ol>
<li>A design review is advisable when a structural water feature incorporates penetrations for wiring, lights, or other submerged features.
<li>Tiles or other architectural finishes may be applied to the waterproofing membrane, subject to a written Variance from the '''''Guarantor''''' and approval by the membrane manufacturer (See [[#1.1.3.6. Variances | Article 1.1.3.6., "Variances"]]).
<li>''Drains'', re-circulation inlets, and outlets used in water features, must include clamping rings, and must be sealed to the membrane ''assembly''.
<li>When a leak detection system is specified, only non‐ferrous metal ''drains'' may be used.
</li></ol>
</li></ol>
</li></ol>

==Section 14.2. Materials==
===14.2.1. Material Properties===
====14.2.1.1. Field and Flashing Membranes====

<ol>
<li>Refer to Article 9.2.1.1. of the published RGC Standard for the specific membrane:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>Single and 2-component liquid membrane flashing systems used on any detail, including pre-curbs, must be listed in [[Division_C | Division C]], and must be proprietary to, or accepted by, the ''manufacturer''.
</li></ol>

====14.2.1.2. Membrane Protection====

<ol>
<li>Refer to [[#9.3.2.7. Protection of Membranes | Article 9.3.2.7.]]
</li></ol>

====14.2.1.3. Reserved====

====14.2.1.4. Drainage Materials====

<ol>
<li>Drainage mats, geo-synthetic drainage cores, and geo-composites used beneath any non-vegetated ''overburden'' and above insulation (when it is specified),
<ol>
<li>may be manufactured with a factory laminated filter fabric, which are designed to resist damage from the weight of the specified ''overburden'',
<li>should be
<ol>
<li>molded (dimpled) or woven plastic grids with a minimum thickness (depth) of 9.5 mm (3/8") thick, and
<li>designed to provide uniform support as well as traffic-bearing properties for overburdens and wearing courses, and
</li></ol>
<li>must be
<ol>
<li>acceptable to manufacturers of both the membrane and insulation,
<li>suitable for the installed ''system covering'',
<li>selected for their ability to support dead loads, live loads, and point loads, and
<li>capable of permitting the anticipated flow rate of water.
</li></ol>
</li></ol>
<li>Proprietary geocomposite and geosynthetic panels must be designed with sufficient compressive strength to support the design load of ''overburdens'' as well expected live loads and be acceptable for use by th''e membrane manufacturer''.
</li></ol>

====14.2.1.5. Insulation and Insulation Overlays====
(See [[#Part 7 - Insulation | Part 7, "Insulation"]], and [[#Part 8 - Insulation Overlays | Part 8, "Insulation Overlays"]])

<ol>
<li>All insulation specified for use in a ''waterproofing system'' must be XPS and shall conform to the requirements in [[#7.2.2.1. Extruded Polystyrene Insulation | Article 7.2.2.1.]] and shall be capable of supporting any superimposed loads.
<li>When XPS (with or without a concrete topping) is specified as the drainage layer, it must be grooved (by the manufacturer, or as a post-manufacturing alteration).
</li></ol>

====14.2.1.6. Filter Fabric====

<ol>
<li>Filter fabrics that are not factory-bonded to a drainage layer must be
<ol>
<li>acceptable to the ''manufacturer'',
<li>suitable for the installed ''system covering'',
<li>selected for their ability to support dead loads, live loads, and point loads, and
<li>capable of permitting the anticipated flow rate of water.
</li></ol>
<li>Fabric filter mats must be
<ol>
<li>water permeable and have proven long term weather resistance, and
<li>strong enough to withstand traffic abuse and prevent displacement of insulation boards under flotation conditions.
</li></ol>
</li></ol>

====14.2.1.7. Decorative Stone (Aggregate Rock) Covering====

<ol>
<li>Decorative stone (aggregate rock) (See [[Notes to GLW Standard#A-14.1.3.10. | Note A-14.1.3.10.]]) must be washed and may be smooth or crushed.
<li>Large grade stone may withstand wind scour more effectively than smaller stone, but the ''Design Authority'' must determine the gradients, based on the ''specified wind loads'' for the ''waterproofing assembly'' (See also Article 3.2.2.3. Stone (Gravel) Ballast in the related waterproofing roof Standard).
</li></ol>

====14.2.1.8. Pavers and Pedestals====

<ol>
<li>Pavers that are partially supported (i.e., with pedestals) must be capable of resisting anticipated loads.
<li>Pedestals
<ol>
<li>must provide airflow for drying surfaces and assist in leveling,
<li>must be purpose-made and include an integral spacer rib no more than 4.76 mm (1/8”) wide, to uniformly separate pavers,
<li>should not impede the flow of water or air,
<li>should uniformly distribute the dead load of pavers and predicted live loads, and
<li>should be adjustable when a level surface is required, and
</li></ol>
</li></ol>

==Section 14.3. Application==
===14.3.1. Guarantee Term Requirements===
====14.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====14.3.1.2. Reserved====

===14.3.2. All Systems===
====14.3.2.1. Membranes and Membrane Protection====

<ol>
<li>Membranes and membrane flashing must be installed in keeping with the requirements found elsewhere in this Standard.
<li>Protection of waterproofing membranes from mechanical damage caused by tools, accident or the work of others is mandatory during the installation and maintenance of any ''system covering'' or living space (See also [[#9.1.3.4. Membrane Protection | Article 9.1.3.4. Membrane Protection]], for related requirements).
</li></ol>

====14.3.2.2. Filter Fabric====

<ol>
<li>Fabric filter rolls must be
<ol>
<li>at least 2489.2 mm (98") wide,
<li>installed loose-laid (un-bonded) over the insulation and below any type of ballast or ''system covering'',
<li>overlapped at all edges a minimum of 304.8 mm (12"),
<li>slit to fit over penetrations,
<li>cut out around ''drains'' and other openings,
<li>carried up all vertical transitions (including penetration flashings) above the ''finished system surface'' at least 76.2 mm (3”),
<li>loosely held in place behind metal counterflashings or ''wall'' finishes, at all perimeter edges and curbs, and
<li>secured around penetration flashings.
</li></ol>
</li></ol>

====14.3.2.3. Drainage====

<ol>
<li>The location of the drainage layer(s) shall conform to the requirements in [[#Part 7 | Part 7]].
<li>A second drainage layer may be installed above the insulation, but this is at the discretion of the ''Design Authority''.
<li>Specialized proprietary drainage products must be acceptable to the ''manufacturer''.
</li></ol>

====14.3.2.4. Decorative Stone (Aggregate Rock) Covering====

<ol>
<li>When decorative stone (aggregate rock) is specified as a ''system covering'', only washed stone may be used.
<li>Ballast guards must be installed around all ''drains'' (See [[#11.3.2.3. Drain Protection Against Blockage | Article 11.3.2.3.]]).
<li>Crushed stone specified as a ''system covering'' must be
<ol>
<li>installed over a geotextile protection layer, or its equivalent, when the stone is crushed or smaller than 12.7 mm (1/2”) in diameter, and
<li>must be applied with sufficient volume to hold down the protection layer against displacement by wind.
</li></ol>
</li></ol>

====14.3.2.5. Wearing Surfaces====

<ol>
<li>Pavers on pedestals promote free subsurface drainage at the membrane level and are therefore strongly recommended whenever practical.
<li>Pavers and unit-type masonry, such as brick or stone, must be supported by
<ol>
<li>proprietary (purpose-made) pedestals with at least a 4.76 mm (1/8”) integral spacer ribs for uniform spacing of pavers,
<li>a proprietary drainage layer overlaid with a filter fabric mat, or
<li>a drainage layer of loose aggregate (such as pea gravel) measuring at least 25.4 mm (1") in depth, installed over a filter fabric.
</li></ol>
<li>Pedestals, or a drainage layer,
<ol>
<li>shall be installed above the filtration layer, which may be laid over a membrane protection layer (in an uninsulated system) or over XPS insulation,
<li>must permit at least 12.7 mm (1/2″) of vertical separation between the paver and the underlying substrate, to provide airflow for drying surfaces and assist in leveling, and
<li>should not impede the flow of water or air, and should uniformly distribute the dead load of pavers, and other unit masonry products, as well as predicted live loads.
</li></ol>
<li>Pedestals shall be installed above the filtration layer, which may be laid over a membrane protection layer (in an uninsulated system) or over XPS insulation.
<li>Cast-in-place concrete installed directly above the roof membrane must be separated from the membrane and its protection layers with material and a filter fabric or barrier material specified by the ''Design Authority'' and conforming to the requirements in [[#14.1.3.11. Wearing Surfaces | Article 14.1.3.11.]]
</li></ol>

====14.3.2.6. Reserved====

====14.3.2.7. Structures and Equipment====

<ol>
<li>Structures must conform to the requirements in [[#14.1.3.13. Structures and Equipment | Article 14.1.3.13.]]; structures that do not conform must be reviewed with the ''Design Authority'' before waterproofing.
<li>Pre‐curbs (Figure 14.3.2.7.-A) must
<ol>
<li>achieve a finished height at least 101.6 mm (4") above the drainage plane of the highest adjacent waterproofing assembly (For an example of this see Construction Detail "Structural Planter"), and
<li>be completely enveloped with fully adhered acceptable sheet or liquid membrane flashing (including all faces of drainage knock‐outs).
</li></ol>
<li>All planters and water features must be fully waterproofed on the inside; sheet membrane installation must conform to the requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]], and liquid membrane flashing shall conform to the requirements in [[#10.3.3.4. Liquid Membrane Flashing | Article 10.3.3.4.]]
<li>All membrane flashing shall terminate
<ol>
<li>on the outside face of the planter wall, at least 50.8 mm (2”) below the upper edge, or
<li>on the inside face of the planter wall with a cut reglet ''linear metal flashing'', caulked with sealant and installed no less than 50.8 mm (2”) above the top surface of growing media.
</li></ol>
<li>Structural installations that do not incorporate pre-curbs must be fully enveloped with membrane, which shall be installed to conform to Article 10.3.2.3.
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 14.3.2.7.-A Pre-curbs and Sheet Membrane Flashing''' || 2025-October-25 }} {{hilite | Forming Part of Article 14.3.2.7. || 2025-October-25 }} (Click to expand illustration)
|-
| [[File:SBS Figure 14.3.1.jpg|link=http://rpm.rcabc.org/images/5/5b/SBS_Figure_14.3.1.jpg | 450 px]]
|}

<li>Dowels (reinforcement bar) should be
<ol>
<li>inserted into the pre‐curb after application of sheet membrane flashing, and
<li>waterproofed in their final position, where they penetrate the pre-curb.
</li></ol>
<li>When dowels are installed prior to the application of sheet membrane flashing, membrane flashing must be applied over the ''curb'' and around the dowels, and the dowels shall be waterproofed with an RGC-accepted, reinforced 2-component liquid membrane flashing system.
<li>Dowels must be waterproofed with
<ol>
<li>a single application of an RGC-accepted reinforced 2-component liquid membrane flashing, or
<li>two (2) applications of a single-component liquid membrane flashing,
<ol>
<li>applied to properly prepared surfaces,
<li>fully cured between coats,
<li>in keeping with the application requirements in [[#10.3.3.4. Liquid Membrane Flashing | Article 10.3.3.4.]], for 2-component reinforced liquid membrane flashing, or the manufacturer’s instructions, when using a single-component liquid membrane flashing, and
<li>applied no less than 50.8 mm (2”) on vertical surfaces and in a radius around the base of each dowel.
</li></ol>
</li></ol>
<li>When structures or equipment exceed the limits stated in [[Guarantee#3.2.1.6. Removal and Reinstatement of Overburden | Division A, Article 3.2.1.6. Removal and Reinstatement of Overburden]], a membrane integrity scan and any resulting repairs must be undertaken before the membrane is covered.
</li></ol>

<hr>
<div id=NOTES></div>

=[[Notes to SBS Standard | Notes to Standard]]=

</div>
</div>
<div class="col-md-12">

[[RCABC Roofing Practices Manual| Home]]
</div>

{{Template:RPM Page Footer with Copyright and Current Date}}

(Draft) Notes to GLW Standard

2026-06-19T22:13:09Z

James Klassen: /* Notes to Part 8 */

(Draft) Notes to GLW Standard

2026-06-19T22:12:50Z

James Klassen: /* Notes to Part 7 */

(Draft) Notes to GLW Standard

2026-06-19T22:06:10Z

James Klassen: /* A-6.1.3.1. Responsibility for Design */

(Draft) Notes to GLW Standard

2026-06-19T22:03:29Z

James Klassen: /* A-6.2.1.2. Prohibited Materials for RoofStar Guarantee */

(Draft) RGC Standard for Grade-level Waterproofing Systems

2026-06-19T22:00:29Z

James Klassen: /* 5.1.3.1. Required Use of Overlays */

__NONUMBEREDHEADINGS__
<div class="row">

{{DISPLAYTITLE:{{FULLPAGENAME}}}}
<div class="row">

<div class="col-md-3" style="float:right;" id="tocDiv">
<div class="noautonum">__TOC__</div>
</div> 

<div class="col-md-9" id="mainBodyDiv">

<big><big>Division B - Standards</big></big> 
<big>Other Waterproofing Systems</big> 

<hr>
<big><big><big><big><big><big>RGC Standard for Grade-level Waterproofing Systems</big></big></big></big></big></big>
<div class="panel panel-primary">
<div class="panel-heading"><big>'''About the Standard'''</big></div>
<div class="panel-body">
This Standard is a consolidation of requirements previously published in the Roofing Practices Manual for all waterproofing systems applied to structural decks at or touching grade. It is comprised of fourteen (14) Parts that contain the requirements, guiding principles, recommendations, and informative materials necessary for a roof to qualify for a '''''RoofStar 5-Year Guarantee''''' or '''''RoofStar 10-Year Guarantee'''''.

Notes to the Standard are hyperlinked from each Part and can be read by using the link in the Table of Contents for the Standard. Highlighted text within the body of the Standard indicates revisions made within the last twelve (12) months.

This Standard follows a specific structure, incorporates defined terms, and utilizes coloured text to denote specific meaning; this is explained in [[Structure_and_Organization_of_RPM_and_Standards | Division A, Part 2, "Structure and Organization of RPM and Standards"]]. When the requirements in this Standard conflict with other resources found either in this Manual or in ''manufacturer's'' published instructions, the rules for Authority and Conflict in [[Structure_and_Organization_of_RPM_and_Standards#2.3.1.2._Authority_and_Conflict | Division A, Article 2.3.1.2.]] shall be applied.

Readers are advised to review relevant materials that can be accessed through the hyperlinks embedded in the body of text.

<div class="col-md-12">
</div>
<hr>
<div class="col-md-4">
</div>
<div class="col-md-4">

:::{|
|-
! <div style="text-align:center;"><big><big>Table of Contents</big></big></div>
|-
| [[#PART_1 | Part 1 - General]]
|-
| [[#PART_2 | Part 2 - Supporting Structures: Decks and Walls]]
|-
| [[#PART_3 | Part 3 - Securing the Waterproofing Assembly]]
|-
| [[#PART_4 | Part 4 - Materials]]
|-
| [[#PART_5 | Part 5 - Deck and Wall Overlays]]
|-
| [[#PART_6 | Part 6 - Air and Vapour Controls]]
|-
| [[#PART_7 | Part 7 - Insulation]]
|-
| [[#PART_8 | Part 8 - Reserved]]
|-
| [[#PART_9 | Part 9 - Membrane System Field]]
|-
| [[#PART_10 | Part 10 - Perimeters and Walls]]
|-
| [[#PART_11 | Part 11 - Drainage]]
|-
| [[#PART_12 | Part 12 - Penetrations and Curbs]]
|-
| [[#PART_13 | Part 13 - Linear Metal Flashing]]
|-
| [[#PART_14 | Part 14 - Planters and Other Structures]]
|-
| <hr>
|-
| [[Notes to GLW Standard | Notes to Standard]]
|-
|}

</div>
<div class="col-md-12">
<hr>
<div style="text-align:center">
'''First Edition''': January 1, 2010
 '''Previous Edition''': April 5, 2024
 '''Current Edition''': Adopted June 11, 2026
 
All changes to this Standard are effective <big>'''July 1, 2026'''</big>
</div>
<div style="text-align:center">
{{Template:RPM Page Footer with Copyright and Current Date}}
</div>
</div>
</div>
</div>
<div id=PREFACE></div>
=Preface=
In 2010, the RCABC Guarantee Corp. (RGC) launched the RoofStar Guarantee for Waterproofing Systems and its supporting Standard, “Waterproofing Systems – Plazas, Promenades and Terraces”. Today, we call it the RGC Standard for Grade-level Waterproofing Systems. This Standard was substantially revised and adopted June 11, 2026 to align its structure and much of its content with the roofing Standards published in the RCABC Roofing Practices Manual. Although much of the content in this Standard applies to all waterproofing systems, regardless of membrane type, the reader will occasionally find links to membrane-specific content published in the related ''waterproofing roof'' Standards.

Waterproofing is a broad term that means sealing a surface or assembly so that water cannot pass into or through it. Unlike systems that shed water (for example, a metal or asphalt shingle roofs), waterproofing does not depend on gravity. Instead, it is accomplished with materials and methods that resist the transmission of water, even water that accumulates depth and is left standing on the waterproofed surface. However, there are some differences between waterproofing a roof and waterproofing on structural ''decks'' at grade.

Often, structural ''decks'' constructed at grade are not built with slope to drains, and because waterproofing assemblies are not insulated below the membrane, they do not utilize sloped insulation to move water to drains and a drainage system. Hydrostatic pressure is therefore more of a concern than it might be on many roofs (water exerts a pressure of 1000 Kg/m2 per metre of depth, or 62.2 lbs/ft2 per foot of depth). For that reason, only fully adhered membranes are permitted on these assemblies, the membranes are generally thicker than those that can be installed on a roof, the assemblies may be only uninsulated or “protected” (insulated above the membrane), and membrane reinforcement may be restricted to maximize flexibility while minimizing puncture resistance.

Structural concrete slabs at grade are also used differently from roofs. Often, these surfaces are leveraged by the general contractor and other trades for loading and staging materials, running equipment, and processing or fabricating building components. Because these platforms are suspended over occupied space or parking garages, the membranes installed on these ''decks'' must be tough, reliable, and protected, able to withstand abuse and damage. The methods used to install and seal them also must be rigorous. Membranes used in this kind of waterproofing must also be tested for watertightness and, when they are covered by permanent wearing courses, which can be expensive to remove if a leak occurs (for example, patios and gardens around the front entrance of a condominium tower), they must be guarded by an electronic leak detection (ELD) system. In some instances, the use of ELD is a requirement of this Guarantee.

Waterproofing is accomplished with single or multi-ply membrane systems RGC in membranes that are manufactured in various forms – as sheet goods (often packaged and delivered to site in rolls), or as liquid-applied systems, reinforced with a fabric (often polyester).

This Standard is limited to assemblies that are generally for pedestrian access, with limited access by emergency vehicles. It is also limited to structural slabs that touch grade; fully elevated podium ''decks'' are governed by the RGC waterproofing roof Standards. For that reason, a '''''RoofStar Guarantee for Grade-level Waterproofing''''' is not available for parking surfaces, driveways, or foundation walls below grade.

Within the scope of this Standard, much is possible and permissible. However, not everything permissible is necessarily advisable; good judgement must be exercised at the design stage to ensure a ''project’s'' success, and good judgement reaches well beyond what this Standard can address.

As a fully integrated document, every Part of this Standard contains critical requirements that sometimes overlap requirements in other Parts. While numerous requirements are linked internally to related Articles throughout the Standard, not every relationship between requirements is made in this fashion. Therefore, the reader must become familiar with the Standard in its entirety.

- RCABC Technical Services

<div id=PART_1></div>
=Part 1 - General=
==Section 1.1. Design==
===1.1.1. General===
====1.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
<li>In addition to the Scope described in Division A, this Standard applies to the design and construction of new or replacement waterproofing assemblies strictly intended for pedestrian traffic and limited emergency vehicle access strictly (See [[#1.1.1.2. Coverage and Limitations | Article 1.1.1.2.]] for limitations of coverage).
</li></ol>

====1.1.1.2. Coverage and Limitations====

<ol>
<li>Coverage under the '''''RoofStar™ Guarantee''''' shall be as described in Division A, [[Guarantee#3.2.1.1._Guarantee_Terms_and_Coverage | Article 3.2.1.1.]] and [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Article 3.2.1.2.]]
<li>A '''''RoofStar Guarantee''''' for ''waterproofing assemblies'' covers only ''waterproofing systems'' installed on structural ''decks'' that touch grade (the ground), that are strictly intended for pedestrian traffic (plazas, promenades, and terraces) and limited emergency vehicle access; ''waterproofing systems'' applied to or installed on vehicle parking ''decks'' and driveways, below-grade walls, foundations and footings, and repairs or renovations to in-service ''waterproofing systems'', do not qualify for a '''''RoofStar Guarantee''''' for ''waterproofing assemblies''.
</li></ol>

====1.1.1.3. References====

<ol>
<li>In this Standard, all references to
<ol>
<li>the "British Columbia Building Code" (the "Building Code", or the "Code"), to municipal or regional building codes or regulations, or to other standards, presume the current edition that is in force,
<li>materials mean those materials expressly accepted by the '''''Guarantor''''', unless stated otherwise, and
<li>measurements are shown in metric units first, followed by Imperial values (typically in parentheses; see [[Structure_and_Organization_of_RPM_and_Standards#2.1.3.2._Measurements | Division A, Article 2.1.3.2., "Measurements"]]).
</li></ol>
</li></ol>

====1.1.1.4. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part and the Standard:
<ol>
<li>''Design Authority'' means the individual or firm responsible for the issuance of ''project'' specifications and details to which the ''project'' will be bid and constructed. When a ''Contractor'' designs a ''project'', the ''Contractor'' is deemed to be the ''Design Authority''.
<li>''Finished system surface'' means the top surface of any waterproofing or water-shedding system, inclusive of ballast or ''overburden''.
<li>''Grade-level waterproofing system'' means an insulated or uninsulated ''system'', designed and constructed at grade with a sheet or liquid-applied membrane, to exclude water.
<li>''Guarantor'' (used interchangeably with '''''RGC''''') means the '''RCABC Guarantee Corporation''', which offers the '''''RoofStar Guarantee'''''.
<li> ''Linear metal flashing'' means flashings cut and shaped from flat metal stock, to redirect water at roof perimeters and edges, or to control the flow of water in valleys and drainage spillways. ''Linear metal flashings'' also protect roof membranes from weathering and damage and provide an aesthetic finish to the ''waterproofing system'' or ''water-shedding system''.
<li>''Membrane system'' means the combination of field and flashing membranes which function together to waterproof underlying materials and ''systems''.
<li>''Observer'' means a firm or person paid by the building Owner (directly, or through the '''''RGC'''''), who is independent (not a member) of the RCABC, and who is accepted by the '''''RGC''''' to provide Quality Assurance reviews during construction and after completion of the ''project'', according to the terms and conditions set out in RCABC policy.
<li>''Qualified roof condition surveyor'' means a person trained and competent in the use and interpretation of infrared thermographic and electronic moisture scanning equipment, used in the condition assessment of a ''waterproofing system'' or ''water-shedding system''.
<li>''Waterproofing system'' means a sealed, functional arrangement of ''primary materials'' constructed on roofs, plaza ''decks'', or on grade-level slabs (with or without insulation and other related materials), to resist the transmission of liquid water through the system, including water under hydrostatic pressure.
</li></ol>
</li></ol>

====1.1.1.5. Undefined Terms====

<ol>
<li>The following undefined terms are used throughout this Standard and are not formatted differently from the body of text:
<ol>
<li>Grade-level slab is a term that commonly refers to a structural deck conforming to the requirements in [[#2.1.5. Roof Decks | Subsection 2.1.5.]], that directly touches ground (grade) and covers spaces below.
<li>Podium deck is a term that commonly refers to a structural ''deck'' that aligns with [[#2.1.5. Roof Decks | Subsection 2.1.5.]], that touches grade, covers spaces below, supports structures and occupied spaces above it, and is generally limited to pedestrian access and occasional emergency vehicles or seasonal maintenance equipment.
<li>Wearing course is a term that commonly means a hard surface that is installed above the ''waterproofing system'' to resist abrasion and compaction from pedestrian and occasional vehicular traffic; it can be a removable material (“accessible” wearing course, such as pavers), or permanent (“inaccessible”, e.g., a concrete slab poured on top of the ''waterproofing system''.
</ol></li>
</ol></li>

====1.1.1.6. Objectives====

<ol>
<li>Every ''waterproofing system'' shall conform to the more stringent of this Standard or the Building Code or By-law having jurisdiction.
</li></ol>

====1.1.1.7. Responsibility for Design====

<ol>
<li>Each design of a ''waterproofing assembly'' shall be undertaken by a person or persons qualified in the work concerned (See [[#3.1.3.1. Responsibility for Design | Article 3.1.3.1.]] with respect to the securement of the ''roof assembly'').
<li>The ''Coordinating Registered Professional'' is responsible for ensuring the design of the ''vegetated roof assembly'' complies with all applicable building, energy, and fire codes having jurisdiction.
</li></ol>

====1.1.1.8. Pre-Design Requirements====
<ol>
<li>The ''Coordinating Registered Professional'' is responsible to ensure that the design of a ''waterproofing assembly'' is a multi-disciplinary enterprise that aligns with the designs for structural, plumbing, mechanical, electrical, architectural, and building envelope, together with all trades whose work intersects with the ''Contractor’s'' scope of work, to minimize out-of-sequence operations that could compromise the integrity of the completed ''waterproofing assembly''.
</li></ol>

====1.1.1.9. Suitability of Design====
<ol>
<li>The ''Design Authority'' is responsible for determining the appropriate ''waterproofing system'' design and must consider (without limitation)
<ol>
<li>the requirements of the building code having jurisdiction,
<li>the structural capabilities or limitations of the building,
<li>fire resistance and class requirements for the building,
<li>wind loads (See [[#Part 3 - Securing the Roof Assembly | Part 3]] of this Standard),
<li>the effects of nearby structures on the ''waterproofing assembly'',
<li>the potential effects of reflected heat on the ''waterproofing assembly'',
<li>''waterproofing system'' aesthetics, and
<li>maintenance requirements, including the safety of maintenance workers.
</li></ol>
</li></ol>

===1.1.2. Guarantee Requirements===
====1.1.2.1. RoofStar 5-Year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
<li>In addition to Sentence (1), all ''projects'' shall comply with
<ol>
<li>the ''project'' specifications and drawings, and
<li>the ''manufacturer's'' published installation requirements.
</li></ol>
</li></ol>

====1.1.2.2. Reserved====

====1.1.2.3. Quality Control====

<ol>
<li>Notwithstanding any other requirements in this Standard, the ''Contractor'' shall
<ol>
<li>bid the ''project'' to meet the more stringent of this Standard or the ''project'' specifications,
<li>bid the ''project'' to include only RGC-accepted systems and materials,
<li>ensure that the supporting ''waterproofing assembly'' conforms to the requirements and limitations of [[#1.1.3.1. Permitted Roof Systems | Article 1.1.3.1.]],
<li>notify the ''Observer'' at least 24 hours before construction is scheduled to start or resume (72 hours notice is required for ''projects'' further than 100 km from the nearest "Free Zone" city location), and then daily, before work resumes,
<li>ensure that construction conforms to this Standard and exhibits good workmanship,
<li>ensure that samples, reports, shop drawings, ELD arrangements, certificates, manufacturer approvals, warranty documentation, and all other submittals are collected and provided to the '''''Guarantor''''' as required in [[#1.3.2.4. Contractor Submittals | Article 1.3.2.4.]], and
<li>abide by all pertinent RCABC policies.
</li></ol>
</li></ol>

====1.1.2.4. Quality Assurance====
(See [[Notes to GLW Standard#A-1.1.2.4. Quality Assurance | Note A-1.1.2.4.]])

<ol>
<li>Notwithstanding any other requirements in this Standard, the ''Observer'' shall
<ol>
<li>verify that the materials used in construction are accepted by the '''''Guarantor''''' and listed in [[Division C | Division C]] of this ''Manual'',
<li>review the construction of the ''waterproofing system'' (according to the prescribed number of observations, with consideration for the expected duration of construction) for conformance with the more stringent of
<ol>
<li>this Standard,
<li>conditions and limitations in [[Division A | Division A]] of the RPM, as they apply,
<li>the ''manufacturer’s'' published requirements,
<li>the ''project'' drawings and specifications, or
<li>the Building Code having jurisdiction.
</li></ol>
<li>review and report whether the ''Contractor'' has met the RCABC policy requirements noted in this Standard, and
<li>perform cut tests or other acceptable methods, whenever required, to verify that the materials and methods of construction conform to this Standard (for example, this may be required when the ''Contractor'' has completed more than 30 squares of waterproofing without an observation).
</li></ol>
</li></ol>

===1.1.3. All Systems===
====1.1.3.1. Permitted Waterproofing Systems====
(See [[Notes to GLW Standard#A-1.1.3.1. Permitted Waterproofing Systems | Note A-1.1.3.1.]])

<ol>
<li>This Standard applies only to uninsulated or protected ''waterproofing systems'' installed on structural ''decks'' that touch grade; repairs or renovations to in-service ''waterproofing systems'' do not qualify for a '''''RoofStar Guarantee'''''.
</li></ol>

====1.1.3.2. Accessibility for Maintenance====

<ol>
<li>Each ''waterproofing assembly'' should be designed to provide safe access for maintenance of roof drains, corners, or mechanical equipment, where the roof is at least 3 m (10’) above the surface of the ground, or where a hazard to a person exists, should a fall be possible (this principle also applies to roof areas intended for regular occupancy); design elements to mitigate fall hazards should align with the Code having jurisdiction, and with the ''Workers Compensation Act Regulations'', and should include
<ol>
<li>tall parapets,
<li>guardrails, or
<li>tie-off anchors.
</li></ol>
</li></ol>

====1.1.3.3. Membrane Integrity Testing====
(See [[Notes to GLW Standard#A-1.1.3.3. Membrane Integrity Scans | Note A-1.1.3.3.]] and '''Figure 1.1.3.3.-A''')

<ol>
<li>Electrical current membrane integrity testing shall conform to
<ol>
<li>ASTM D7877, "Standard Guide for Electronic Methods for Detecting and Locating Leaks in Waterproof Membranes", or
<li>ASTM D8231, "Standard Practice for the Use of Low Voltage Electronic Scanning System for Detecting and Locating Breaches in Roofing and Waterproofing Membranes."
</li></ol>
<li>An electrical current membrane integrity test is required when anyone other than the ''Contractor'' installs ''overburden'', amenities, or equipment, prior to the installation of any overburden or wearing course (In this Standard, the term "electrical current membrane integrity test" means a test method that uses electrical current and electronic sensing technology to detect breaches in the membrane ''system'').
<li>An electrical current membrane integrity test is required when the ''Contractor'' installs ''overburden'', amenities, or equipment, but only when
<ol>
<li>the total ''project'' area (footprint), inclusive of planters or other waterproofed features, exceeds 18.58 m2 (200 sf), and
<li>''overburden'', amenities, or equipment exceed 152.4 mm (6”) in depth
</li></ol>

<li>An electrical current membrane integrity test must be performed by an RGC-recognized service provider listed in [[Division_C | Division C]].
<li>If flood testing is specified, it shall be conducted prior to the installation of insulation and roof coverings, and must be executed in keeping with ASTM D5957, "Standard Guide for Flood Testing Horizontal Waterproofing Installations".
</li></ol>
</li></ol>
 
::{|
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 1.1.3.3.-A Electronic Integrity Testing''' Forming Part of Article 1.1.3.3. (Click to expand illustration)
|-
| [[File:Figure 1.1.3.3.-A.jpg |link=https://rpm.rcabc.org/images/2/2a/Figure_1.1.3.3.-A.jpg | 800 px]]
|}

====1.1.3.4. Electronic Leak Detection====
(See [[Notes to GLW Standard#A-1.1.3.4. Electronic Leak Detection| Note A-1.1.3.4.]])

<ol>
<li>Electronic Leak Detection (ELD) shall conform to
<ol>
<li>ASTM D7877, "Standard Guide for Electronic Methods for Detecting and Locating Leaks in Waterproof Membranes", or
<li>ASTM D8231, "Standard Practice for the Use of Low Voltage Electronic Scanning System for Detecting and Locating Breaches in Roofing and Waterproofing Membranes."
</li></ol>
<li>Electronic Leak Detection (ELD)
<ol>
<li>is required for all ''waterproofing assemblies'' that are covered with inaccessible ''overburden'',
<li>is strongly recommended for ''waterproofing assemblies'' with accessible ''overburden'',
<li>shall provide detection capabilities for all waterproofing surfaces, and
<li>must extend at least 50.8 mm (2") vertically from the ''drainage plane'' at
<ol>
<li>all transitions,
<li>any point along the entire deck perimeter, and
<li>protrusions.
</li></ol>
</li></ol>
<li>Where the electronic leak detection system utilizes a sensor ribbon (tape) installed on the waterproofing membrane in a grid pattern, the ribbon spacing shall be no more than three (3) metres, measured in any direction, irrespective of the type or depth of ''overburden.''
</li></ol>

====1.1.3.5. Hot Works====

(See [[Notes to GLW Standard#A-1.1.3.5. Hot Works| Note A-1.1.3.5.]])

<ol>
<li>The ''Design Authority'' may specify that the ''Contractor'' must maintain compliance with the RCABC Hot Works Program and consequently manage the Hot Works conducted on site (See [[#1.3.2.1. Hot Works: Contractor Requirements | Article 1.3.2.1.]]).
<li>When the ''project'' involves Hot Work, the ''Design Authority'' must either
<ol>
<li>pre-approve alternate applications already written in this Standard or another applicable Standard published in this ''Manual'', when the specified application is deemed to be fire-sensitive by the ''Contractor'' as part of the risk assessment process, or
<li>provide alternate material and application requirements in the Specification for fire sensitive locations on the ''project''.
</li></ol>
</li></ol>

====1.1.3.6. Variances====

<ol>
<li>When a design is unable to conform to the Standard, the ''Design Authority'' may apply to the RGC for a written Variance.
<li>Application for a written Variance must be made in writing (email correspondence is common), and must
<ol>
<li>identify the ''project'' name and its civic address,
<li>identify the '''''RoofStar Guarantee''''' number (if assigned),
<li>identify the ''Contractor'' (if awarded),
<li>articulate the nature of the design problem,
<li>identify the '''''RoofStar Guarantee''''' requirement to be varied, and state the desired modification (i.e., reduce the requirement for 203.2 mm (8") to 152.4 mm (6")),
<li>cite the reference to which the Variance will apply (i.e., Standard name, article number, sentence number, etc.), and
<li>provide design drawings, photographs, and ''project'' plans, referencing grid lines that identify or articulate the boundaries to which the Variance will be applied.
</li></ol>
<li>Variances are issued by the '''''RGC''''' only to the ''Design Authority'' and will be distributed to the ''Contractor''.
<li>The '''''Guarantor''''' reserves all rights to vary a requirement in a Standard without restrictions, to limit coverage on any part or the whole of a ''project'', or to impose design or construction conditions on a ''project''.
<li>Variances are issued only for the ''project''-specific issue identified in the written request, and do not constitute general permission to depart from the published requirements in this Standard, for any aspect of the same ''project'' or for future ''projects'', designed or constructed by any other firm.
</li></ol>

===1.1.4. Replacement and Alterations===

(The requirements in [[#1.1.3. All Systems | Subsection 1.1.3., "All Systems"]], shall be read together with the following Articles)
(See [[Notes to SBS Standard#A-1.1.4. Alterations and Additions | Note A-1.1.4.]])

====1.1.4.1. General Requirements====

<ol>
<li>Unless expressly permitted otherwise in this Standard, the design for replacement ''waterproofing systems'' shall conform to the requirements for new waterproofing in this Standard.
</li></ol>

====1.1.4.2. Complete Waterproofing System Replacement====

<ol>
<li>Complete ''waterproofing system'' replacement shall conform to the general requirements in [[#1.1.4.1. General Requirements | Article 1.1.4.1.]], unless expressly varied elsewhere in this Standard.
<li>''Waterproofing system'' replacement means the complete removal of membranes, insulation, drainage boards, filtration materials, and metal flashings, replacing them with only new materials.
<li>Where a ''waterproofing system'' ties into air and in-service ''control layers'' in adjacent ''wall'' assemblies, the decision to reuse and repair those ''control layers'' remains the responsibility of the ''Design Authority'' but shall nevertheless be subject to the requirements in [[#Part 6 - Air and Vapour Controls | Part 6, Air and Vapour Controls]] with respect to continuity.
<li>''Waterproofing system'' replacement ''projects'' are eligible to qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', subject to their respective requirements.
</li></ol>

====1.1.4.3. Partial Waterproofing System Replacement====

<ol>
<li>Partial replacement of a ''waterproofing system'' is permissible, but only when the waterproofing membrane and membrane flashing is replaced (other in-service materials may be replaced or retained, as elected by the ''Design Authority''), but coverage under a '''''RoofStar Guarantee''''' is limited to new materials supplied and installed by the ''Contractor''.
<li>Retention of insulation materials in a ''waterproofing system'' is subject to the requirements for insulation in [[#Part 7 - Insulation | Part 7]].
<li>The reinstallation of all retained materials shall conform to this Standard, irrespective of how they were originally installed.

</li></ol>

====1.1.4.4. Membrane Recovering====
(See [[Notes to GLW Standard#A-1.1.4.4. Membrane Recovering | Note A-1.1.4.4.]])

<ol>
<li>Recovering (installing a new ''waterproofing system'' membrane over an in-service membrane system) is not a recommended practice and will limit the scope of coverage under the '''''RoofStar Guarantee'''''.
<li>A '''''RoofStar Guarantee''''' issued for a recovered ''waterproofing system'' membrane is limited strictly to the value of new ''waterproofing system'' materials; in-service materials left in place or reinstated are not covered by the '''''RoofStar Guarantee'''''.
<li>All membrane recovering ''project'' specifications and drawings shall reflect and conform to the construction requirements in [[#1.3.3.4. Membrane Recovering | Article 1.3.3.4.]]
<li>Recovering a ''waterproofing system'' membrane is acceptable to the Guarantor only when the following conditions have been satisfied, together with any other applicable requirements published in this Article or in [[#1.3.3.4. Membrane Recovering | Article 1.3.3.4.]]:
<ol>
<li>the in-service ''waterproofing system'' membrane has never before been recovered (recovering is not permitted over a previously recovered ''waterproofing system'' membrane),
<li>the in-service membrane is free of blisters, damage, seam failures, or breaches, and is still fully bonded to the deck,
<li>in-service or new waterproofing system components installed on top of the recovered membrane must conform to the usual design, material, and construction requirements of this Standard, including wind load requirements,
<li>the recovering specifications, plans, and detail drawings have been provided to, and reviewed by, the Guarantor prior to the tendering of the project,
<li>the Guarantor has issued a written Variance that expressly permits recovering and outlines the conditions and limitations under which recovering may proceed, and
<li>the Design Authority has satisfied the submittal requirements for recovering, in this Standard.
</li></ol>
<li>Before proceeding with roof recovering, the ''Design Authority'' should consider
<ol>
<li>the requirements for moisture testing (described below),
<li>testing securement of materials to be left in place, and
<li>the potential consequences of failure for the building and its use.
</li></ol>
<li>To qualify for a written Variance from the '''''Guarantor''''', the Variance request (See [[#1.1.3.6._Variances |Article 1.1.3.6.]])
<ol>
<li>must identify the type of ''waterproofing system'' to which the Variance pertains (i.e., ''uninsulated'' or ''protected waterproofing system''),
<li>must specify how the in-service ''waterproofing system'' will be physically separated from other roof areas, and
<li>must include the formal independent report that describes the condition of the in-service ''waterproofing system'', and which documents results from cut tests and moisture investigation that are prerequisites for a '''''RoofStar Guarantee'''''.
</li></ol>
<li>In-service ''uninsulated'' and ''protected waterproofing systems'' presented to the '''''Guarantor''''' in a written Variance application by the ''Design Authority'' must be free of blisters and breaches in the membrane.
</li></ol>

====1.1.4.5. Tie-ins, Additions, and Alterations to Existing Waterproofing====

<ol>
<li>When a new ''waterproofing system'' adjoins an in-service ''waterproofing system'' and structural movement between the two is anticipated, an ''expansion joint'' must be used to tie the new system to the in-service system.
<li>If ''project'' conditions do not allow for a ''curb'' joint between new and in-service ''waterproofing systems'', the ''Design Authority'' must submit an alternative design and obtain a written Variance from the '''''Guarantor''''' that permits the elimination of curb joints (see [[#1.1.3.6. Variances | Article 1.1.3.6. Variances]]); any alternative design
<ol>
<li>must include design specifications and construction details showing a positive water cut-off that fully isolates the in-service ''waterproofing system'' from the new ''waterproofing system'', and
<li>shall show how the new ''waterproofing system'' will be easily distinguishable from the existing ''waterproofing system'', and
<li>may be made with the saw-cut method (see [[#1.3.3.5. Tie-ins, Additions, and Alterations to Existing Waterproofing | Article 1.3.3.5.]]), provided the connection between a new ''waterproofing system'' and an in-service ''waterproofing system'' will be free of structural movement.
</li></ol>
<li>Repairs or renovations to an existing ''waterproofing system'' that is not covered by a '''''RoofStar Guarantee''''' do not qualify for a '''''RoofStar Guarantee''''' (the term "renovation" means the removal and replacement of, or the application of a cover to, a portion of the ''waterproofing system'').
<li>Modifications or additions to a ''waterproofing system'' covered by an active '''''RoofStar Guarantee''''' are permissible, subject to various conditions, but must be made by a ''Contractor'' qualified to perform work under the '''''RoofStar Guarantee Program'''''.
</li></ol>

===1.1.5. Reserved===

==Section 1.2. Reserved==

==Section 1.3. Application==
===1.3.1. Reserved===
===1.3.2. All Systems===
====1.3.2.1. Hot Works: Contractor Requirements====

<ol>
<li>The ''Contractor'' must maintain the requirements of the RCABC Hot Works Program, including (without limitation)
<ol>
<li>'''Insurance Coverage''', wherein the limits carried on the ''Contractor’s'' policy must equal or exceed the minimum requirements set by RCABC, and coverage must be unhindered by warranties that limit or exclude coverage when Hot Works is required,
<li>'''Education and training''', since workers who perform Hot Works must be trained by the ''Contractor'' and kept current with acceptable methods,
<li>the [https://free.bcpublications.ca/civix/content/public/bcfc2018/?xsl=/templates/browse.xsl&xsl=/templates/browse.xsl "British Columbia Fire Code"], wherein a Fire Safety Plan, preventative methods or alternative work procedures, fire watches, and the use and placement of equipment at the ''project'' site must comply with the BC Fire Code requirements for Hot Work,
<li>a '''Fire Safety Plan''', whereby
<ol>
<li>the ''Contractor'' must assess the hazards to property and persons and produce a written Fire Safety Plan prior to the start of work, and
<li>the Fire Safety Plan must be kept on the ''project'' site and must be kept current until the ''project'' is completed,
</li></ol>
<li>'''RoofStar Guarantee Standards''', to which the ''Contractor'' must conform, at each juncture where the interface of different membranes applications constitutes part of the Fire Safety Plan,
<li>a '''Fire Watch''', in which the ''Contractor'' must, as part of the Fire Safety Plan, conduct a fire watch
<ol>
<li>that complies with the "British Columbia Fire Code",
<li>is assigned to competent, trained personnel using suitable equipment, including the use of a hand-held infrared thermometer, and
<li>is documented in a written fire watch log, and
</li></ol>
<li>'''Hot Works Notification''', wherein the ''Contractor'' shall notify the ''project'' authority or the AHJ, as and when required, that Hot Works will be performed.
</li></ol>
</li></ol>

====1.3.2.2. Workmanship====

(See [[Notes to GLW Standard#A-1.3.2.2. Workmanship | Note A-1.3.2.2.]])

<ol>
<li>The ''Contractor'' must take reasonable measures to protect the ''project'' from damage by the weather, during and at the completion of the ''project''.
<li>Open penetrations and flashings must be temporarily sealed off from the weather, even when other trades are responsible for making a permanent seal or installing overlapping materials (See [[#4.2.1.1. Use of Accepted Materials | Article 4.2.1.1.]]).
</li></ol>

====1.3.2.3. Contractor Qualifications====

<ol>
<li>Supervision and installation of a RoofStar-guaranteed ''waterproofing system'' may be conducted only by established employees of the ''Contractor'', and every ''project'' must be supervised by a Journeyperson employee who holds a valid ticket.
<li>A Journeyperson may supervise a maximum of three (3) apprentices and/or three (3) labourers (Ref. RCABC Policy A-248).
</li></ol>

====1.3.2.4. Contractor Submittals====

<ol>
<li>The ''Contractor'' shall submit to the '''''Guarantor''''', before a '''''RoofStar Guarantee''''' is issued, any and all required samples, reports, shop drawings, ELD arrangements, certificates, and ''manufacturer'' approvals.
</li></ol>

===1.3.3. Replacement and Alterations===
(The requirements in [[#1.3.2. All Systems | Subsection 1.3.2., "All Systems"]], shall be read together with the following Articles)

====1.3.3.1. General Requirements====

<ol>
<li>Unless expressly permitted otherwise in this Standard, all replacement waterproofing shall conform to the requirements for new waterproofing in this Standard.
</li></ol>

====1.3.3.2. Complete Grade-level Waterproofing System Replacement====

<ol>
<li>See the requirements throughout this Standard, which apply to both new construction and replacement of a waterproofing membrane.
</li></ol>

====1.3.3.3. Partial Grade-level Waterproofing System Replacement====

<ol>
<li>See the requirements throughout this Standard, which apply to both new construction and replacement of a waterproofing membrane.
</li></ol>

====1.3.3.4. Membrane Recovering====
(See [[#1.1.4.4. Membrane Recovering | Article 1.1.4.4.]])

<ol>
<li>Recovering shall not proceed unless permitted by a written Variance issued by the '''''Guarantor''''' prior to the tendering of the ''project''.
<li>All wet material identified by either the independent moisture detection survey or through cut tests shall be removed in the course of construction.
<li>When recovering any in-service ''project'' waterproofed with sheet membrane, the membrane must be
<ol>
<li>clean and free of debris, gravel, blisters, or damage, and
<li>cut through at the perimeter change in plane to relieve any tension or distortions in the membrane.
</li></ol>
<li>When recovering the membrane of a ''waterproofing system'', the means and methods shall conform to the requirements published in Article 1.3.3.4. of the roofing Standard for the permissible membrane.
<li>In-service built-up ''waterproofing systems'' (typically constructed with felt and asphalt) must be spudded clean of gravel, and any loose plies shall be removed.
<li>New membrane system materials must be properly secured to the underlying ''waterproofing assembly''.
<li>All membrane recovering projects must incorporate only new
<ol>
<li>strip-in flashings for penetrations (Ref. [[#Part 12 - Penetrations and Curbs |Part 12]]),
<li>''drains'' (cast-iron drains in usable condition are exempted from this requirement; see [[#11.3.3.2. General Requirements for Cast-iron Roof Drains | Article 11.3.3.2.]]), and
<li>''linear metal flashings'' (Ref. [[#Part 13 - Linear Metal Flashing |Part 13]]).
</li></ol>
</li></ol>

====1.3.3.5. Tie-ins, Additions, and Alterations to Existing Waterproofing====

<ol>
<li>Where a new ''waterproofing system'' adjoins and ties into an existing ''waterproofing system'', the two areas must be isolated and separated by a ''curb'' joint securely attached to the structure and waterproofed in keeping with the requirements for control joints ( [[#10.1.6.2. Control Joints (System Dividers) | Article 10.1.6.2.]] and [[#10.3.6.2. Control Joints (System Dividers) | Article 10.3.6.2.]]).
<li>If the ''Design Authority'' has obtained from the '''''Guarantor''''' a written Variance that permits the elimination of ''curb'' joints, the new ''waterproofing system'' must be fully isolated from the in-service ''waterproofing system'' with a positive water cut-off at the drainage plane:
<ol>
<li>the adjoining membranes must be compatible with each other and of the same membrane system type (e.g., Polymer-modified Bituminous Membranes),
<li>an authorized technical representative for the ''manufacturer'' of the new membrane must provide signed and dated written consent for this detail,
<li>the two areas must be isolated and separated from each other by a water cut-off as required below and illustrated in '''Figure 1.1.4.5.-A''':
<ol>
<li>a saw cut 12.7 mm (1/2”) wide and deep must be made in the new deck, at least 304.8 mm (12”) away from the adjacent ''waterproofing assembly'',
<li>the saw cut must be filled with a membrane-compatible mastic acceptable to the ''manufacturer'',
<li>new membranes should be installed in the same direction as the adjoining in-service membranes,
<li>the new base sheet must span the saw cut and extend past it by at least terminate no closer than 152.4 mm (6”) from the ''control joint'' securely attached to the structure and waterproofed in keeping with the requirements in both Article 10.1.6.2., "Control Joints (Roof Dividers)", and Part 10, "Perimeters and Walls" of the applicable membrane Standard for roofs, and
<li>the new ''waterproofing system'' must be easily distinguishable from the in-service system.
</li></ol>
</li></ol>
</li></ol>

====1.3.3.6. Repairs and Modifications====

<ol>
<li>When a ''waterproofing system'' that is covered by an active (unexpired) '''''RoofStar Guarantee''''' has been damaged or otherwise requires repairs, work shall conform to the specifications of the material manufacturers, and to the requirements in this Standard, with respect to (without limitation)
<ol>
<li>the securement of new materials ([[#Part 3 - Securing the Waterproofing Assembly | Part 3]]),
<li>deck or wall overlays ([[#Part 5 - Deck and Wall Overlays | Part 5]]),
<li>''continuity'' of air and vapour controls ([[#Part 6 - Air and Vapour Controls | Part 6]]),
<li>thermal resistance and insulation overlays ([[#Part 7 - Insulation | Part 7]] and [[#Part 8 - Insulation Overlays | Part 8]]),
<li>membranes ([[#Part 9 - Membrane System Field | Part 9]]),
<li>membrane flashing ([[#Part 10 - Perimeters and Walls | Part 10]]),
<li>drains ([[#Part 11 - Drainage | Part 11]]),
<li>penetrations and curbs ([[#Part 12 - Penetrations and Curbs | Part 12]]), and
<li>linear metal flashings ([[#Part 13 - Linear Metal Flashing | Part 13]]).
</li></ol>
<li>Modifications to an in-service ''waterproofing system'' covered by an active (unexpired) '''''RoofStar Guarantee''''', including (without limitation) the addition of new ''curbs'', ''drains'', or penetrations, shall conform to all the requirements in this Standard, or as otherwise stated.
</li></ol>

===1.3.4. Reserved===

<hr>
<div id=PART_2></div>

=Part 2 - Supporting Structures: Decks and Walls=
(See [[Notes to GLW Standard#A-2 | Note A-2]])

==Section 2.1. Design==
===2.1.1. General===
====2.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====2.1.1.2. Defined Terms====
(See '''Figure 2.1.1.2.-A''')

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Common Slope'' means a slope 1:3 (4” in 12”, or 18 degrees), up to and including 1:1 (12” in 12”, or 45 degrees).
<li>''Deck overlay'' means a panel material secured to the ''supporting deck'', to render the deck surface suitable for the installation of roofing materials.
<li>''Extreme Slope'' means a slope greater than 21:12 (21” in 12”, or 84 degrees).
<li>''Flat'' means a slope less than 1:6 (2” in 12”, or 9 degrees).
<li>''Low Slope'' means a roof with a slope 1:6 (2" in 12", or 9 degrees, up to but less than 1:3 (4” in 12”, or 18 degrees).
<li>''Sheathing'' means a rigid panel material secured directly onto framing.
<li>''Steep Slope'' means a slope greater than 1:1 (12” in 12”, or 45 degrees) up to and including 21:12 (21” in 12”, or 84 degrees).
<li>''Supporting deck'' ("deck"), as used in this Standard, means the "structural surface to which a ''waterproofing system'' is applied" (adapted from ''ASTM D1079-18 Standard Terminology Relating to Roofing and Waterproofing'').
<li>''Wall'' means a structural or non-structural element in a building that vertically separates space. ''Walls'' may separate the outside environment from the interior conditioned space of a building, or they may separate one or more interior spaces from each other (adapted from ASTM E631-15, "Standard Terminology of Building Constructions").
<li>''Wall overlay'' means a panel material secured to the surface of a ''wall'', to render it suitable for the installation of waterproofing or ''wall'' cladding materials.
</li></ol>
</li></ol>
 
:::{|
|-
| colspan="1"; style="text-align:center;width:500px;" | '''Figure 2.1.1.2.-A Roof Slope''' Forming Part of Article 2.1.1.2. (Click to expand illustration)
|-
| [[File:Figure 2.1.1.2.-A (Slopes).jpg|link=https://rpm.rcabc.org/images/4/4d/Figure_2.1.1.2.-A_%28Slopes%29.jpg| 600 px]]
|}

===2.1.2. Guarantee Term Requirements===
====2.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====2.1.2.2. Reserved====

===2.1.3. All Systems===
====2.1.3.1. General Requirements for Roof Slope====

<ol>
<li>The ''Design Authority'' must design the slope of a ''deck'' to achieve proper drainage and must take into consideration the anticipated deflection and settlement of the structure, which may interfere with drainage.
<li>While good drainage is desirable but not always perfectly achievable, and ''waterproofing systems'' generally are not affected by standing water, each ''project'' design should incorporate sufficient slope to move water off the ''waterproofing system'' surface.
<li>"Sufficient slope", which is subject to conditions that permit evaporation, shall mean that no standing water remains on the ''waterproofing system'' surface after a reasonable interval following a rainfall.
<li>''Deck'' slope should be increased beyond the minimums published in this Standard when local climate conditions, such as rainfall frequency or severity, result in ongoing or significant ponding conditions (see [[#2.1.3.2. Deck Slope for New Construction | Article 2.1.3.2.]] and [[#2.1.3.3. Slope for Replacement Roofing | Article 2.1.3.3.]] for minimum requirements).
<li>Drainage (slope toward plumbing ''drains'') should be achieved (in descending order of best practices) with
<ol>
<li>four-way slope to ''drain'',
<li>slope to a common valley, or to gutters, or
<li>positive sloping valleys to ''drains''.
</li></ol>
</li></ol>

====2.1.3.2. Deck Slope for New Construction====

<ol>
<li>All new construction waterproofing should be designed and built with a slope of no less than 2% (1/4” in 12”), measured on the primary sloped planes of the system, but positive slope off the ''deck'' or to drains is required.
<li>Where practicable, ''drains'' should be located mid-span on a ''deck'' between supporting columns or walls, especially when ''deck'' slopes are less than 1:50 (1/4” in 12”), to take advantage of ''deck'' deflections from future loads.
</li></ol>

====2.1.3.3. Slope for Replacement Waterproofing====

<ol>
<li>Replacement ''waterproofing systems'' may qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''' without correcting poor drainage, though the elimination of ponding (standing water) is strongly recommended.
</li></ol>

====2.1.3.4. Deck Condition and Suitability for Waterproofing====

<ol>
<li>The Code having jurisdiction prevails in all cases except where it is exceeded by the requirements published in this Standard.
<li>Notwithstanding the requirements in this Standard, the '''''RoofStar Guarantee''''' does not cover the ''supporting deck'' material or its attachment to the building structure, which is the responsibility of the ''Design Authority'' and the building contractor.
<li>The supporting ''deck'' must be dimensionally stable, resist deflection from dead and live loads, and must be capable of accommodating ''waterproofing system'' component movement.
<li>''Walls'', ''parapets'', ''curbs'', blocking, and penetrations should be constructed or placed by other trades prior to the commencement of waterproofing work.
</li></ol>

====2.1.3.5. Drainage Around Obstructions====

<ol>
<li>''Curbs'' that span 2438.4 mm (96") or more when measured perpendicular to roof slope, across the direction of drainage, should be designed with a cricket to divert water around the ''curb''.
</li></ol>

===2.1.4. Reserved===
===2.1.5. Structural Decks===
====2.1.5.1. Steel Roof Decks====
(See [[Notes to GLW Standard#A-2.1.5.1.| Note A-2.1.5.1.]]) (See also [[#Part 9 - Roof Field (Membrane Systems) | Part 9]] and [[#Part 10 - Perimeters and Walls | Part 10]] for substrate preparation requirements)

<ol>
<li>Although not as common as concrete, steel structural ''decks'' must be acceptable to the ''manufacturer'' and must conform to either
<ol>
<li>ASTM Standard Specification A653 / A653M, "Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process": Structural (Physical) Quality, minimum Grade 33, with a design thickness of 22-gauge (0.759 mm) or greater and a minimum zinc coating designation ''Z275'', or
<li>ASTM Standard Specification A792 / A792M, "Steel Sheet, Aluminum-Zinc Alloy-Coated by the Hot-Dip Process": General Requirements, minimum Grade 33, with a design thickness of 22-gauge (0.759 mm) or greater and a minimum aluminum-zinc alloy coating designation ''AZ150''.
</li></ol>
<li>Steel ''deck'' panels must be properly aligned, squarely intersect walls, and provide a smooth level surface for waterproofing.
<li>Steel ''decks'' that receive poured concrete overlays shall have vented pans to prevent entrapment of moisture; this work is by other trades.
</li></ol>

====2.1.5.2. Concrete Decks====
(See [[Notes to GLW Standard#A-2.1.5.2.| Note A-2.1.5.2.]])

<ol>
<li>Cast-in-place and precast concrete ''decks'' must cure for at least 28 days before receiving an adhered waterproofing membrane ("adhered", as it is used in this requirement, means fully or intermittently bonding any membrane to the ''deck'' with an adhesive, hot asphalt (bitumen), or heat), but this limitation may be reduced if
<ol>
<li>both the building envelope engineer and the ''manufacturer'' expressly permit membrane application within the first 28 days after pouring, and
<li>their respective signed letters of permission are furnished to the '''''Guarantor''''' forthwith, to be included with the ''project'' record.
</li></ol>
<li>Shotcrete-formed concrete decks are not an acceptable substrate for the application of sheet membranes.
</li></ol>

====2.1.5.3. Wood Decks====

<ol>
<li>Wood decks are not acceptable substrates for ''waterproofing systems'' covered under the '''''RoofStar Guarantee Program'''''.
</li></ol>

===2.1.6. Reserved===

===2.1.7. Walls===
(See [[Notes to GLW Standard#A-2.1.7.| Note A-2.1.7.]])

====2.1.7.1. General====
<ol>
<li>''Wall'' surfaces must be clean, dry, and smooth, suitable for the application of ''waterproofing system'' materials.
<li>''Wall'' framing must be sheathed with a material suitable for adhering waterproofing membranes and securing metal flashings; when sheathing is unsuitable, it must be overlaid with an accepted wall overlay.
<li>''Sheathing'' is considered a wall surface for the purpose of this Standard.
<li>''Wall'' surfaces suitable for receiving ''waterproofing'' materials must extend beyond the maximum installed height of the ''waterproofing'', but in any event must be installed at least 203.2 mm (8”) above the ''finished system surface'' (For ''wall'' overlays, refer to [[#5.2.1.3. Overlays for Walls | Article 5.2.1.3.]]).
<li>Indirect connections between ''walls'' and the structural ''deck'' require a ''control joint'' (See [[Notes to GLW Standard#A-10.1.6.2. | Note A-10.1.6.2.]]).
</li></ol>

===2.1.8. Reserved===

==Section 2.2. Materials==
===2.2.1. Material Properties===
====2.2.1.1. Sheathing for Framed Walls====

<ol>
<li>Framed wall sheathing must be
<ol>
<li>moisture resistant fibreglass-faced silicon treated gypsum core board, with a minimum thickness of 12.7 mm (1/2”) (These panels are specifically designed to receive waterproofing membranes and may be installed horizontally or vertically).
<li>fibre-reinforced cementitious panels with a minimum thickness of 9.53 mm (3/8"), or
<li>plywood, having a minimum thickness of 12.7 mm (1/2”).
</li></ol>
<li>Where ''wall'' sheathing is unsuitable to receive waterproofing materials, refer to [[#Part 5 - Deck and Wall Overlays | Part 5, "Deck and Wall Overlays"]].
</li></ol>

==Section 2.3. Application==
===2.3.1. Guarantee Term Requirements===
====2.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

===2.3.2. All Systems ===
====2.3.2.1. Construction of Decks and Walls====

<ol>
<li>Unless otherwise permitted and described in this Standard, the construction of ''deck'' and ''wall'' structures, and their suitability for the application of waterproofing materials, is the responsibility of other trades.
</li></ol>

<hr>
<div id=PART_3></div>

=Part 3 - Securing the Waterproofing Assembly=

==Section 3.1. Design==
===3.1.1. General===
====3.1.1.1. Scope====
(See [[Notes to GLW Standard#A-3.1.1.1.| Note A-3.1.1.1.]])

<ol>
<li>For waterproofing assemblies that are exposed to wind, refer to the design, material, and application requirements for wind resistance, published in Part 3 of the published RGC Standard for the specific membrane, for uninsulated or insulated (protected) systems:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#Part_3_-_Securing_the_Roof_Assembly Part 3] in the RGC Standard for SBS-modified Bituminous Membrane Roofs.
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#Part_3_-_Securing_the_Roof_Assembly Part 3] in the RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs.
</li></ol>
</li></ol>

<hr>
<div id=PART_4></div>

=Part 4 - Materials=
==Section 4.1. Design==
===4.1.1. General===
====4.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====4.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Primary Material'', as used in this Standard, means a material used in a ''waterproofing system'' that is manufactured for exposure to the weather.
<li>''Secondary Material'', as used in this Standard, means a material that is used in a ''waterproofing system'' that is not usually exposed to the weather.
</li></ol>
</li></ol>

==Section 4.2. Materials==
===4.2.1. Material Properties===
====4.2.1.1. Use of Accepted Materials====
(For limitations and exclusions pertaining to materials, see [[Guarantee#3.2.1.2. Limitations and Exclusions of Guarantee | Division A, Article 3.2.1.2.]])

<ol>
<li>All materials installed by the ''Contractor'', for new construction or alterations, must be
<ol>
<li>newly manufactured (except for reusable insulation; see [[#7.1.3.2. General Requirements | Article 7.1.3.2.]]), and may not be recycled without the expressed, written consent of the '''''Guarantor''''',
<li>accepted by the '''''RoofStar Guarantee Program''''', and
<li>manufactured by, or listed as acceptable to, the manufacturer of the ''primary material''.
</li></ol>
<li>All uninstalled materials must be
<ol>
<li>protected from weather with wrappers approved or recommended by the ''manufacturer'',
<li>properly stacked, and
<li>secured above ground or on the ''project'' surface.
</li></ol>
<li>All installed roofing materials that are susceptible to moisture damage must be made watertight by the end of each workday.
<li>Metals and fasteners must be compatible with each other, to avoid galvanic corrosion which can occur when dissimilar metals contact each other.
</li></ol>

==Section 4.3. Application==
===4.3.1. Guarantee Term Requirements===
====4.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====4.3.1.2. Reserved====

===4.3.2. All Systems===
====4.3.2.1. Application of New Materials====

<ol>
<li>All new materials installed as part of the ''waterproofing system'' shall conform to the ''manufacturer's'' published requirements, unless superseded by this Standard.
</li></ol>

<hr>
<div id=PART_5></div>

=Part 5 - Deck and Wall Overlays=
(See [[Notes to GLW Standard#A-5| Note A-5]])

==Section 5.1. Design==
===5.1.1. General===
====5.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====5.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===5.1.2. Guarantee Term Requirements===
====5.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====5.1.2.2. Reserved====

===5.1.3. All Systems===
====5.1.3.1. Required Use of Overlays====
(See [[#Part 9 - Membrane System field) | Part 9]] and [[#Part 10 - Perimeters and Walls | Part 10]] for substrate preparation requirements)

<ol>
<li>Two layers of fibre-reinforced cement board deck overlay conforming to the requirements in [[#5.2.1.1. Suitability of Overlays | Article 5.2.1.1.]] must be specified when the ''deck'' is steel.
<li>When wall sheathing is not suitable to receive waterproofing, at least one layer of an acceptable wall overlay conforming to [[#5.2.1.3. Overlays for Walls | Article 5.2.1.3.]] shall be specified for ''walls'' (other than concrete) that will receive waterproofing materials.
</li></ol>

==Section 5.2. Materials==
(See [[Division_C | Division C]])

===5.2.1. Material Properties===
====5.2.1.1. Suitability of Overlays====

<ol>
<li>''Deck'' and ''wall'' overlays must be
<ol>
<li>listed in [[Division_C | Division C]],
<li>acceptable to the ''manufacturer'',
<li>suitable for the type of ''deck'', and
<li>suitable for, and compatible with, any membrane or panel application.
</li></ol>
</li></ol>

====5.2.1.2. Overlays for Decks====

<ol>
<li>Only fibre-reinforced cementitious panels (boards) may be used on steel ''decks'' and shall be
<ol>
<li>manufactured in conformance with ASTM C1325 (latest edition), “Standard Specification for Fiber-Mat Reinforced Cementitious Backer Units”,
<li>at least 12.7 mm (1/2”) thick,
<li>acceptable to the ''manufacturer'',
<li>suitable for the type of ''deck'', and
<li>suitable for, and compatible with, any membrane or panel application.
</li></ol>
</li></ol>

====5.2.1.3. Overlays for Walls====

<ol>
<li>In addition to overlays listed in [[Division_C | Division C]], ''walls'' may be overlaid with
<ol>
<li>plywood, provided the plywood is least 12.7 mm (1/2”) thick and is pressure-treated when applied over concrete or concrete masonry units (CMU),
<li>Type A fibre-reinforced cementitious panels (boards) manufactured in conformance with ASTM C1325 (latest edition), “Standard Specification for Fiber-Mat Reinforced Cementitious Backer Units”, or
<li>inorganic moisture-resistant panels listed in [[Division_C | Division C]].
</li></ol>
</li></ol>

====5.2.1.4. Fasteners====

<ol>
<li>Refer to Article 3.2.2.1. of the related ''waterproofing roof'' Standard.
</li></ol>

==Section 5.3. Application==
(This Section shall be read in conjunction with the requirements for substrate preparation in [[#Part 9 - Roof Field (Membrane Systems) | Part 9]] and [[#Part 10 - Perimeters and Walls | Part 10]])

===5.3.1. Guarantee Term Requirements===
====5.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====5.3.1.2. Reserved====

===5.3.2. All Systems===
====5.3.2.1. Overlays on Concrete Decks====

<ol>
<li>A ''deck'' overlay board is not mandatory on a concrete ''deck'', but when it is specified, it must be installed to conform to the requirements in this Part.
</li></ol>

====5.3.2.2. Overlays on Steel Decks====

<ol>
<li>Steel decks must provide a smooth, even surface for waterproofing and therefore must be topped with concrete or overlaid with no fewer than two layers of fibre-mat reinforced cement boards.
<li>''Deck'' overlays must be
<ol>
<li>fully or intermittently supported along all edges by the ''deck'', and
<li>installed in a staggered pattern (offset) 304.8 mm (12") from adjacent board rows (a minus offset tolerance of 50.8 mm (2") maximum will be permitted to compensate for variance in the manufacturer's tolerance of differing board widths and lengths).
</li></ol>
<li>The base layer of ''deck'' overlays shall be affixed to the ''deck'' with mechanical fasteners or adhesives acceptable to the ''manufacturer'' specified by the ''Design Authority'' and conforming to the requirements in Article 3.2.2.1. or 3.2.2.2. of the related ''waterproofing roof'' Standard.
<li>When spacing requirements for fasteners are not provided by the ''Design Authority'', installation shall comply with the requirements in '''Table 5.3.2.2.-A'''.
<li>Only adhesives acceptable to the ''manufacturer'' shall be used to secure the second layer of ''deck'' overlays; mechanical fixation through both layers is not permitted.
<li>When the waterproofing membrane is liquid-applied (including hot-applied rubberized asphalt), all board joints that will receive liquid applied membrane systems must be taped with the waterproofing ''manufacturer's'' approved joint tape.
</li></ol>
 
::::{|
|-
|-
| colspan="4"; style="text-align:center;width:450px;" | '''Table 5.3.2.2.-A Minimum Fastener Requirements for Deck Overlay Fastening''' Forming Part of Article 5.3.2.2.
|-
|}
{| class="wikitable" style="margin-left: 20pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:center;"
|-
! Thickness !! Deck Flute Width !! Board Size !! Screws & Metal Stress Plates
|-
| 9.5 mm (3/8”) || up to 125 mm (5") || 1200 mm x 2400 mm (48" x 96") || 12
|-
| 12.7 mm (1/2") || up to 125 mm (5") || 1200 mm x 2400 mm (48" x 96") || 12
|-
| 15.9 mm (5/8") || up to 200mm (8") || 1200 mm x 2400 mm (48" x 96") || 12
|-
|}

====5.3.2.3. Overlays on Steel Decks with Concrete Topping====

<ol>
<li>A ''deck'' overlay is not required for steel ''decks'' topped with concrete..
</li></ol>

====5.3.2.4. Reserved====

====5.3.2.5. Support, Arrangement, and Securement of Wall Overlays====

<ol>
<li>All concrete or masonry ''parapets'' and ''walls'' must provide a smooth, clean, dry surface for membrane adhesion.
<li>When ''walls'' do not provide a smooth, clean, dry surface for membrane adhesion may be overlaid with a minimum 15.9 mm (5/8") treated plywood or 9.5 mm (3/8") reinforced cement board that conforms to Type A fibre-reinforced cementitious panels (boards) manufactured in conformance with ASTM C1325 (latest edition), “Standard Specification for Fiber-Mat Reinforced Cementitious Backer Units”.
<li>''Wall'' overlays must be mechanically attached or adhered to the wall with polyurethane an adhesive acceptable to the ''manufacturer''.
<li>When waterproofing is applied directly to masonry ''parapets'' or ''walls'', follow the applicable RGC roof Standard from [[Division B | Division B]].
<li>A ''parapet wall'' is required at adjoining walls where the ''deck'' is not supported by the ''wall'' (expansion joint) and shall be sheathed with minimum 15.9 mm (5/8") plywood or 9.5 mm (3/8") reinforced cement board that conforms to ASTM C1325-04.
<li>Wall sheathing shall be fastened to preservative treated blocking or to steel stud framing that is attached solidly to the ''deck'' and not the ''wall''.
<li>Compressible insulation is to be installed between the sheathing and the ''wall'' and an accepted expansion joint membrane as well as metal counter flashing shall be installed.
</li></ol>

<hr>
<div id=PART_6></div>

=Part 6 - Air and Vapour Controls=
(See [[Notes to GLW Standard#A-6 | Note A-6]])

==Section 6.1. Design==
===6.1.1 General===
====6.1.1.1. Scope====
(See [[Notes to GLW Standard#A-6.1.1.1. | Note A-6.1.1.1.]])

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====6.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Air barrier'' means a material that is manufactured and tested to prohibit the passage of air through that material.
<li>''Continuity'' means a sealed, resistive, continuous connection
<ol>
<li>between ''control layers'' that have the same function, and
<li>between a ''control layer'' and another material or object it joins to (i.e., a roof drain or penetration).
</li></ol>
<li>''Control layer'' means a material used in a ''waterproofing assembly'' or ''wall assembly'', that is manufactured and tested to resist or control the movement of air, vapour, or liquid water into or through that assembly.
<li>''Vapour retarder'' means a material that is manufactured and tested to prohibit or regulate the passage of water vapour through that material.
<li>''Water resistive barrier'' (WRB) means a material that is manufactured and tested to resist the transmission of liquid water through the material and is usually used in wall assemblies.
</li></ol>
</li></ol>

===6.1.2. Guarantee Term Requirements===
====6.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====6.1.2.2. Reserved====

===6.1.3. All Systems===
====6.1.3.1. Responsibility for Design====

<ol>
<li>The ''Design Authority'' is responsible for specifying
<ol>
<li>air and vapour control materials,
<li>the placement of continuous air and vapour ''control layers'' in relation to a ''waterproofing system'' and its components, and
<li>the selection of suitable materials for that application (See [[Notes to Hot Rubber Standard#A-6.1.3.1. | Note A-6.1.3.1.]]).
</li></ol>
<li>The ''Design Authority'' is urged to review and consider the performance characteristics of materials available for such applications.
<li>Coverage under the '''''RoofStar Guarantee''''' shall be as described in [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]].
<li>Notwithstanding coverage provisions in Division A, neither the '''''RoofStar Guarantee Program''''' nor the ''Contractor'' will accept any responsibility for damage to, or failure of, the ''waterproofing system'' caused by the use or absence of air or vapour ''control layers''.
</li></ol>

====6.1.3.2. Continuity of Control Layers====

<ol>
<li>The ''Design Authority'', and trades constructing walls and waterproofing assemblies, are jointly responsible for making proper connections (continuity) between air and vapour control ''systems'', including the transitions between assemblies built by different trades (See [[#6.1.3.1. Responsibility for Design | Article 6.1.3.1.]] and [[#6.3.2.1. Continuity and Support | Article 6.3.2.1.]]).
<li>Where air, vapour, or water ''control layers'' intersect a ''roof drain'', ''overflow drain'', ''scupper drain'', or penetration, the intersection must be designed for ''continuity'', and drawings must detail the execution of ''continuity'' for the ''Contractor''.
<li>''Overflow drains'' and ''scupper drains'' that penetrate ''wall assemblies'' must be designed and drawn to prevent air intrusion from the outside environment (See Article 3.1.5.1. in the related ''waterproofing roof'' Standard).
</li></ol>

====6.1.3.3. Use of Air Control Materials====

<ol>
<li>The ''Design Authority'' is responsible for the selection of air control materials (some air ''control layers'' are considered vapour permeable, others vapour-impermeable); ''waterproofing systems'' intended to qualify for a '''''RoofStar Guarantee''''' should be designed according to the regulatory design and installation requirements for effective, continuous air control ''systems''.
<li>All materials selected by the ''Design Authority'' should conform to the material and performance characteristics required in the "British Columbia Building Code", Division B,[https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp5s54 Article 5.4.1.2., "Air Barrier System Properties"].
</li></ol>

====6.1.3.4. Use of Vapour Control Materials====

<ol>
<li>Because continuous vapour ''control layers'' may be needed to limit “water vapour transmission and condensation, burn protection, and severe climatic conditions” (National Energy Code of Canada for Buildings 2020, [https://nrc-publications.canada.ca/eng/view/ft/?id=af36747e-3eee-4024-a1b4-73833555c7fa Article 5.2.5.3.(1), "Other Considerations"]; see also the "British Columbia Building Code", Division B, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp5s55 Article 5.5.1.1., "Required Resistance to Vapour Diffusion"]), they are considered discretionary and must be specified by the ''Design Authority''.
<li>Where continuous vapour ''control layers'' are required and specified by Code, the '''''RoofStar Guarantee Program''''' requires that a suitable vapour control ''system'' be selected by the ''Design Authority'' and properly installed by the ''Contractor'' in conformity with the vapour ''control layer'' manufacturer’s published instructions, and with the ''Design Authority’s'' specified details.
</li></ol>

====6.1.3.5. Reserved====

====6.1.3.6. Reserved====

==Section 6.2. Materials==
===6.2.1. Material Properties===
====6.2.1.1. Compatibility with Other Materials====

<ol>
<li>The material selected for air and vapour ''control layers'' must be compatible with any other materials in the ''waterproofing system'' or ''wall'' ''assembly'' to which the ''control layer'' may come in contact, including (without limitation) contact with primers and adhesives, substrates, solvents, and cleaners.
</li></ol>

====6.2.1.2. Permitted Materials for RoofStar Guarantee====
(See [[Notes to GLW Standard#A-6.2.1.2. | Note A-6.2.1.2.]])

<ol>
<li>While responsibility for the selection of suitable air and vapour ''control layers'' rests with the ''Design Authority'', a ''waterproofing system'' designed and built to qualify for a '''''RoofStar Guarantee''''' must satisfy the requirements in [[#6.2.1.3. Puncture Resistance and Thickness | Article 6.2.1.3.]]
</li></ol>

====6.2.1.3. Puncture Resistance and Thickness====

<ol>
<li>Air and vapour controls should be installed over a continuous smooth plane, regardless of a material's ability to span voids or spaces in the deck.
<li>Fully supported air and vapour ''control layers'' should possess a minimum published static puncture resistance rating of 150 N (34 lbf) (Ref. CGSB-37.56-M for both test method and standard limits) and be either self-adhering or torch-applied; a high puncture resistance is necessary for the membrane to withstand accidental damage during construction.
<li>Where no ''deck'' overlay board is installed and the air and vapour ''control layers'' are partially unsupported (for example, on a steel ''deck''), the ''control layers'' must possess a published static puncture resistance of at least 400 N (90 lbf).
<li>Should the air or vapour ''control layers'' be used as a temporary roof during ''project'' construction by either the ''Contractor'' or by other trades, a minimum 2 mm thick bituminous membrane is recommended.
</li></ol>

====6.2.1.4. Self-adhered and Torch-applied Materials====

<ol>
<li>Self-adhering or adhesive-applied materials should be considered as alternatives to torch-applied membranes when the substrate to which they will be applied is combustible, or when nearby structures, openings or materials present a fire hazard.
<li>A suitable separation or overlay material may be used as protection from open flame is acceptable; the application of materials to a combustible surface, using a torch, is strictly prohibited.
</li></ol>

====6.2.1.5. Reserved====

==Section 6.3. Application==
===6.3.1. Guarantee Term Requirements===
====6.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====6.3.1.2. Reserved====

===6.3.2. All Systems===
====6.3.2.1. Continuity and Support====

<ol>
<li>The ''Contractor'' must
<ol>
<li>ensure that air and vapour ''control layers'' that form part of ''wall'' assemblies and tie into the ''waterproofing assembly'' are installed to provide at least 101.6 mm (4”) of overlap, for ''continuity'' of matching layers in adjacent assemblies,
<li>ensure that air and vapour ''control layers'' are sealed to penetrations and drains that pass through or enter the ''waterproofing assembly'', and
<li>seal all ''control layers'' to matching layers in adjacent assemblies (i.e., ''walls'').
</li></ol>
<li>Installation of all air and vapour control materials must be smooth and uniform, without wrinkles or fish-mouths, and must also conform to the manufacturer’s published requirements and the ''Design Authority’s'' design details.
<li>All air and vapour control membrane side and end laps must be fully supported, in the field and at transitions with curbs, ''parapets'', ''walls'', and penetrations.
<li>''Drains'', ''overflow drains'', ''scupper drains'', and penetrations must be detailed where they intersect an air, vapour, or water ''control layer'', to provide ''continuity''.
</ol></li>

====6.3.2.2. Torch-applied Materials====

<ol>
<li>The application of materials to unprotected combustible materials, using a torch, is strictly prohibited.
<li>All combustible materials MUST be protected from open flame by an acceptable separation or overlay material; this includes, without limitation, combustible materials
<ol>
<li>on ''decks'', ''walls'', blocking, and canted edges, and
<li>that are hidden or obscured within voids, cracks, or orifices.
</li></ol>
<li>When a torch-applied membrane is specified over or adjacent to combustible materials, all joints between overlay panels, and at ''waterproofing system''-''wall'' transitions, must be sealed with the primary membrane ''manufacturer’s'' approved self-adhered membrane or tapes.
<li>Where torch-applied membranes are not permitted or desirable, the installation of bituminous air and vapour ''control layers'' should align with the approaches described and required in the "Standard for SBS-modified Bitumen Membrane Roof Systems", [[SBS_Roof_Systems_Standard#10.3.8. Alternative Approaches to Sheet Membrane Flashing | Subsection 10.3.8., "Alternative Approaches to Sheet Membrane Flashing"]].
</li></ol>

====6.3.2.3. Securement on Slopes====

<ol>
<li>Self-adhered membranes applied to slopes greater than 1:6 (2” in 12”) should be additionally secured with mechanical fasteners in locations where slippage may occur, to counter-act material displacement resulting from temperatures that exceed the membrane’s service temperature.
</li></ol>

====6.3.2.4. Reserved====

<hr>

<div id=PART_7></div>

=Part 7 - Insulation=
==Section 7.1. Design==
===7.1.1. General===
====7.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====7.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Heat-resistant insulation'' means insulation that resists heat and will not physically or chemically change when exposed to heat greater than 70°C (158°F), including heat from liquefied bitumen. Insulation boards of this type include fibreboard, polyisocyanurate, and mineral fibre ("wool"). Note that "heat-resistant" does not mean or even infer 'fire-proof'. While some heat-resistant insulation materials will resist burning for a time, only mineral fibre insulation will not burn.
<li>''Heat-sensitive insulation'' means insulation that may be physically or chemically altered when exposed to heat greater than 70°C (158°F) — for example, heat from a torch or from liquefied bitumen. Heat-sensitive insulation includes EPS, XPS and polyurethane.
</li></ol>
</li></ol>

===7.1.2. Guarantee Term Requirements===
====7.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====7.1.2.2. Reserved====

====7.1.2.3. Reserved====

===7.1.3. All Systems===
====7.1.3.1. Responsibility for Design====
(See [[Notes to GLW Standard#A-7.1.3.1.| Note A-7.1.3.1.]])

<ol>
<li>The ''Design Authority'' is responsible to ensure the design conforms to the Building Code and any other applicable requirements.
</li></ol>

====7.1.3.2. General Requirements====

<ol>
<li>Selected board insulation products may be used within the membrane ''waterproofing systems'', provided the panels are listed in [[Division_C | Division C]], and conform to the material specifications in [[#Section 7.2. Materials | Section 7.2.]]
</li></ol>

====7.1.3.3. Use of Existing Insulation====

<ol>
<li>Existing insulation in a ''waterproofing system'' may be reused (it will be excluded from coverage under the '''''Guarantee''''', which applies only to new materials), provided
<ol>
<li>the insulation is dry (most XPS insulation absorbs water vapour while in service),
<li>the ''Design Authority'' has specified its reuse, and
<li>the condition of the insulation is acceptable to the ''Design Authority'' as suitable to satisfy the requirements of the Building Code.
</li></ol>
</li></ol>

====7.1.3.4. Thermal Resistance and Layering====
(See [[Notes to GLW Standard#A-7.1.3.4.| Note A-7.1.3.4.]])

<ol>
<li>All insulated ''waterproofing systems'' with a cumulative thermal resistance greater than RSI-2.64 (R-15) (based on published LTTR values measured at 24°C) must be installed in multiple layers that are offset and staggered (See [[#Section 7.3. Application | Section 7.3., "Application"]]).
<li>In a multi-layered ''assembly'', any single layer of insulation in the field may have a thermal resistance greater than RSI-2.64 (R-15) provided no one layer exceeds 60% of the cumulative thermal resistance of the combined ''assembly'' of insulation, measured together with the thermal resistance of insulation overlay boards (See '''Figure 7.1.3.4.-A''').
<li>At intersections with insulated curbs and walls, insulation joints at the ''waterproofing system''-wall interface must be offset and staggered to minimize or eliminate thermal bridging (See '''Figure 7.3.2.2.-A)'''.
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 7.1.3.4.-A Effective Thermal Resistance and Layering''' Forming Part of Sentence 7.1.3.4.(2) (Click to expand illustration)
|-
| [[File:Figure 7.1.3.-A (XPS).jpg|link=https://rpm.rcabc.org/images/a/ae/Figure_7.1.3.-A_%28XPS%29.jpg | 600 px]]
|}

===7.1.4. Reserved===

===7.1.5. Reserved===

===7.1.6. Protected Waterproofing Systems===
(The requirements in [[#7.1.3. All Systems | Subsection 7.1.3., "All Systems"]], shall be read together with the following articles)

====7.1.6.1. Insulation Selection====

<ol>
<li>Only extruded polystyrene insulation (XPS) may be specified for a ''waterproofing system''.
</li></ol>

====7.1.6.2. Drainage Mats and Filter Fabric====

<ol>
<li>At least one drainage layer is required in a ''protected waterproofing system'', either above or below the XPS insulation, but
<ol>
<li>when openings for penetrations in ''walls'' or the ''deck'' provide less than 203.2 mm (8”) of clearance, the filtration layer must be water-permeable and the drainage layer shall be below the XPS insulation, to lower the ''drainage plane'' and minimize leaks into the building, and
<li>a drainage layer shall be specified above the XPS insulation when any ''overburden'' superimposed on the ''waterproofing system'' will result in a “vapour-closed” condition (i.e., landscaping, or an impermeable wearing course).
</li></ol>
<li>Filter fabric must be specified to cover XPS insulation, to
<ol>
<li>contain the insulation and thereby prevent ‘insulation stacking’ (displacement) when insulation boards become buoyant in water, and
<li>prevent fines from settling at the membrane level and filling the voids between insulation board joints.
</li></ol>
</li></ol>

==Section 7.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===7.2.1. Material Properties===
====7.2.1.1. General====

<ol>
<li>Only insulation boards accepted for use in the '''''RoofStar Guarantee Program''''', and acceptable to the membrane manufacturer, may be used to qualify for a '''''RoofStar Guarantee'''''.
</li></ol>

====7.2.1.2. Material Dimensions====

<ol>
<li>While minimal insulation panel thicknesses are permissible for some designs, some materials are by their nature breakable, and therefore the ''Design Authority'' should consider the constructability of the ''waterproofing system'' from a material handling perspective and consider specifying a thicker panel.
</li></ol>
</li></ol>

====7.2.1.3. Drainage Mats====

<ol>
<li>Drainage mats shall conform to the requirements in [[#14.2.1.4. Drainage and Water Retention Materials | Article 14.2.1.4.]]
</li></ol>

====7.2.1.4. Filter Fabric====

<ol>
<li>Filter fabrics shall conform to the requirements in [[#14.2.1.6. Filter Fabric | Article 14.2.1.6.]]
</li></ol>

===7.2.2. Suitability of Insulation===
====7.2.2.1. Extruded Polystyrene Insulation====

<ol>
<li>Extruded polystyrene insulation ("XPS") is ''heat-sensitive'' and
<ol>
<li>shall conform to CAN/CGSB-51.20-M87, "Thermal Insulation, Polystyrene, Boards and Pipe Covering", for Type 4 insulation, and to ASTM C578, "Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation", and
<li>is the only insulation that may be specified and installed in a ''waterproofing system''.
</li></ol>
</li></ol>

==Section 7.3. Application==
===7.3.1. Guarantee Term Requirements===
====7.3.1.1. RoofStar 5-year and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====7.3.1.2. Reserved====

===7.3.2. All Systems===
====7.3.2.1. Procurement of Insulation====

<ol>
<li>All insulation, except insulation that may be specified for re-use (See [[#7.1.3.2. General Requirements | Article 7.1.3.2.]]), must be supplied and installed by the ''Contractor''.
</li></ol>

====7.3.2.2. Alignment, Sizing, and Support====

<ol>
<li>Insulation boards
<ol>
<li>must be clean and dry,
<li>must be firmly supported,
<li>should be square and should make firm, full contact with adjacent panels,
<li>must be installed with the appropriate grade of expanding spray foam applied to gaps greater than 6.35 mm (1/4”) (this requirement does not apply to extruded polystyrene (XPS) installed in a ''protected waterproofing system''), and
<li>shall not be soldiered and must be laterally offset at least 304.8 mm (12") in two directions, both for adjacent layers and for adjacent row; a minus offset tolerance of 50.8 mm (2") maximum is permissible (See '''Figure 7.3.2.2.-A''').
</li></ol>
<li>Offsets are not required for
<ol>
<li>sloped insulation boards that are generally installed soldiered fashion to adjacent rows, and
<li>the first layer of overlay board, installed on top of heat-sensitive insulation, which may be soldiered to facilitate joint taping.
</li></ol>
 
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 7.3.2.2.-A Offset and Staggered Layering in Field''' Forming Part of Clause 7.3.2.2.(1)(4) (Click to expand illustration)
|-
| [[File:Figure 7.3.2.-A (XPS).jpg|link=https://rpm.rcabc.org/images/1/15/Figure_7.3.2.-A_%28XPS%29.jpg | 500 px]]
|}
 
<li>On exterior insulated walls, insulation joints at the waterproofing system-wall interface must be offset and staggered to eliminate thermal bridging (See '''Figure 7.3.2.2.-B''').
 
 
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 7.3.2.2.-B Offset and Staggered Layering at Wall''' Forming Part of Clause 7.3.2.2.(3) (Click to expand illustration)
|-
| [[File:Figure 7.3.2.2.-B (Hot Rubber).png|link=https://rpm.rcabc.org/images/3/30/Figure_7.3.2.2.-B_%28Hot_Rubber%29.png| 500 px]]
|}
</li></ol>

====7.3.2.3. Insulation Securement====

<ol>
<li>Insulation securement shall conform to the specified design for the ''waterproofing assembly'', calculated to resist flotation and (when applicable) ''specified wind loads''.
</li></ol>

====7.3.2.4. Reserved====

===7.3.3. Reserved===

===7.3.4. Reserved===
===7.3.5. Protected Waterproofing Systems===
(The requirements in [[#7.3.2. All Systems | Subsection 7.3.2., "All Systems"]], shall be read together with the following articles)

====7.3.5.1. Sequencing of Work====

<ol>
<li>Insulation installed against ''walls'' or ''curbs'' must be separated from waterproofing membranes with a non-bonding drainage mat or slip sheet.
<li>Insulation must be secured and protected immediately after installation.
</li></ol>

====7.3.5.2. Drainage Mats====
(See also [[#Part 11 - Drainage | Part 11, "Drainage"]])

<ol>
<li>At least one drainage layer is required in a ''waterproofing system'' and its location within the system shall conform to the design requirements in [[#7.1.6.2. Drainage Mats and Filter Fabric| Sentence 7.1.6.2.(1)]].
<li>A drainage mat must be installed below the XPS insulation.
<li>A second drainage layer may be installed above the insulation but is at the discretion of the ''Design Authority''.
<li>If a second drainage layer is specified, a vertical separation space measuring at least 12.7 mm (1/2″) must be preserved between the drainage layer and any ballast or overburden, to permit airflow and to assist in leveling.
<li>Specialized proprietary drainage products must be acceptable to the membrane ''manufacturer''.
<li>Ballast guards must be installed around all roof drains.
</li></ol>

====7.3.5.3. Filter Fabric====

<ol>
<li>Fabric filter mats must be
<ol>
<li>installed loose-laid (un-bonded) over the insulation and below any type of ballast or ''waterproofing system'' covering,
<li>overlapped at all edges a minimum of 304.8 mm (12”),
<li>at least 2438.4 mm x 2438.4 mm (96" x 96") in size, and
<li>slit to fit over roof penetrations or cut out around ''drains'' and other openings.
</li></ol>
<li>Filter fabric must extend up perimeter edges and ''curbs'' and must be placed loose (unattached) under metal counter flashings or wall finishes.
<li>When the filtration layer is part of a ''vegetated roof assembly'', the filtration layer shall conform to [https://rpm.rcabc.org/index.php?title=VRA_Standard#10.3.2.7._Installation_of_Void_Fill_and_Filtration_Layers Article 10.3.2.7.] of the “RGC Standard for Vegetated Roofs”.
</li></ol>

<hr>
<div id=PART_8></div>

=Part 8 - Reserved=

<hr>
<div id=PART_9></div>

=Part 9 - Membrane System Field=
==Section 9.1. Design==
===9.1.1. General===
====9.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====9.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Manufacturer'' means the manufacturer of the primary waterproofing material, unless stated otherwise.
<li>''Parallel to Slope'' means the direction parallel to the angle of a sloped plane.
</li></ol>
</li></ol>

===9.1.2. Guarantee Term Requirements===
====9.1.2.1. RoofStar 5-year Guarantee Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in Part 9 of the relevant RGC Standard for Waterproofing Roofs (See [[#9.1.3.1. General Requirements | Article 9.1.3.1.]] in this Standard)..
</li></ol>

====9.1.2.2. Reserved====

====9.1.2.3. Reserved====

===9.1.3. All Systems===
====9.1.3.1. General Requirements====

<ol>
<li>Only waterproofing membrane systems that are fully adhered and have an accepted protection layer installed above the membrane (protected) qualifies for coverage under the '''''RoofStar Guarantee Program'''''.
<li>All ''waterproofing system'' accessory components must be supplied or be accepted for use by the membrane ''manufacturer''.
<li>All materials must be protected from weather by properly stacking above ground or Deck surfaces and keep in factory packaging or other adequate covering until applied
</li></ol>

====9.1.3.2. Requirements for SBS-modified Bituminous Membrane Systems====

<ol>
<li>The field application of SBS-modified bituminous membrane ''waterproofing systems'' on structural ''decks'' at grade shall conform to the requirements in Part 9 of the [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard RGC Standard for SBS-modified Bitumen Membrane Roofs], published in [[Division B | Division B]] of this ''Manual''.
<li>Fully adhered membranes means membranes that are torch-applied, self-adhered, hot-mopped, or adhesive-applied; no other applications are permissible in ''waterproofing assemblies''.
</li></ol>

====9.1.3.3. Requirements for Hot Fluid-applied Rubberized Asphalt Systems====

<ol>
<li>The field application of hot fluid-applied rubberized asphalt ''waterproofing systems'' on structural ''decks'' at grade shall conform to the requirements in Part 9 of the [https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs], published in [[Division B | Division B]] of this ''Manual''.
</li></ol>

====9.1.3.4. Control Joints (Area Dividers)====

<ol>
<li>When ''control joints'' (system dividers) are recommended or required by the ''manufacturer'', or are deemed necessary by the ''Design Authority'', they must be designed following the requirements in [[#10.1.6.2. Control Joints (Area Dividers) | Article 10.1.6.2.]]
</li></ol>

====9.1.3.5. Securement====
(See [[Notes to GLW Standard#A-9.1.3.3. | Note A-9.1.3.3.]])

<ol>
<li>''Waterproofing assemblies'' that are exposed to wind loads must be secured to resist displacement by ''specified wind loads'', and therefore the requirements in this Article shall be read together with the requirements in [[#Part 3 - Securing the Waterproofing Assembly | Part 3]] of this Standard.
</li></ol>

====9.1.3.6. Membrane Protection====

<ol>
<li>The design must specify immediate protection of a newly installed, fully reinforced membrane, using materials specified or deemed suitable by the ''manufacturer''.
<li>Installed membranes must be protected with materials conforming to the requirements in [[#9.2.1.3. Protection Materials | Article 9.2.1.3.]], using methods conforming to the requirements in [[#9.3.2.7. Protection of Membranes | Article 9.3.2.7.]]
<li>Installed membranes must be protected from damage caused by
<ol>
<li>any walkway surface,
<li>work performed concurrently or subsequently by other trades (the ''Design Authority'' is strongly urged to direct the work of other trades through specific, explicit directives in the design specifications), and
<li>chemicals or other contaminants that may adversely impact the waterproofing membrane or other ''system'' components, including (without limitation)
<ol>
<li>animal or vegetable grease,
<li>hot pipes (release valves),
<li>petroleum products or bi-products, and
<li>miscellaneous fluids from equipment (See also [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6.]] for application of reinforced liquid membrane flashing around roof penetrations).
</li></ol>
</li></ol>
<li>Membranes should be protected from
<ol>
<li>pool or garden chemicals and fertilizers,
<li>pet urine,
<li>bird excrement, and
<li>refrigerants.
</li></ol>
</li></ol>
</li></ol>

====9.1.3.5. Walkways====

<ol>
<li>The membrane must be suitably protected from mechanical damage by walkway surfaces.
<li>Paver walkway surfaces must be suitably supported in keeping with [[#14.1.3.11. Wearing Surfaces | Article 14.1.3.11.]] and [[#14.3.2.5. Wearing Surfaces | Article 14.3.2.5., "Wearing Surfaces"]].
</li></ol>

===9.1.4. Reserved===

===9.1.5. Uninsulated Systems===
(The requirements in [[#9.1.3. All Systems | Subsection 9.1.3., "All Systems"]], shall be read together with the following articles)

====9.1.5.1. General Requirements====

<ol>
<li>The installed membrane must be immediately protected with materials specified or deemed suitable by the ''manufacturer''.
</li></ol>

===9.1.6. Protected Systems===
(The requirements in [[#9.1.3. All Systems | Subsection 9.1.3., "All Systems"]], shall be read together with the following articles)

====9.1.6.1. General Requirements====

<ol>
<li>Ballasted systems shall conform to the requirements in [[#3.3.5.1. Ballasted Systems | Article 3.3.5.1.]] of the related ''waterproofing roof'' Standard, and in [[#9.1.3.3. Securement | Article 9.1.3.3.]] of this Standard.
</li></ol>

==Section 9.2. Materials==
(See [[Division_C | Division C]])

===9.2.1. Material Properties===
====9.2.1.1. Membrane Composition, Thickness, and Selection====

<ol>
<li>In addition to the minimum membrane thickness requirements in Sub-section 9.1.3., membranes shall conform to the requirements in Article 9.2.1.1. of the published RGC Standard for the specific membrane:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
</li></ol>

====9.2.1.2. Reserved====

====9.2.1.3. Protection Materials====

<ol>
<li>Membrane protection materials shall be compatible with the primary membrane, resist puncturing, and (except for ‘hot rubber’) resist bonding with the membrane.
<li>Materials used to protect an SBS-modified bituminous membrane must be
<ol>
<li>an RGC-accepted asphaltic core board measuring at least 4.76 mm (3/16”) thick,
<li>an RGC-accepted cap sheet at least 4.0 mm thick, or
<li>a protection mat acceptable to the membrane ''manufacturer''.
</ol></li>
<li>Materials used to protect a hot fluid-applied rubberized asphalt membrane must be acceptable to and specified by the ''manufacturer'' and shall be either
<ol>
<li>an RGC-accepted asphaltic core board measuring at least 4.76 mm (3/16”) thick, conforming to CSA-A123.25, or
<li>SBS-modified bituminous sheet membranes which shall be
<ol>
<li>reinforced with a non-woven polyester scrim no less than 180g/m2, or with a composite scrim of equal puncture resistance,
<li>no less than 2.0 mm (80 mils) thick, when measured in the middle of the membrane sheet, and
<li>sanded on the underside.
</ol></li>
</ol></li>
<li>Filtration fabrics shall conform to the requirements in [[#7.2.1.4. Filter Fabric | Article 7.2.1.4.]]
</ol></li>

===9.2.2. Materials Storage and Handling===
====9.2.2.1. Protection from the Weather====

<ol>
<li>All uninstalled materials must be protected from weather by properly stacking them above ground, or above the ''waterproofing system'' surface, in or beneath covers that are weather-resistant and secured against displacement by wind (See also [[#4.2.1.1. Use of Accepted Materials | Article 4.2.1.1. Use of Accepted Materials]]).
</ol></li>

===9.2.3. Accessories===
====9.2.3.1. Accessories Supplied by Membrane Manufacturer====

<ol>
<li>All membrane accessory components must be supplied by and acceptable to the ''manufacturer'', as stipulated in [[#9.1.3.1. General Requirements for All Systems | Article 9.1.3.1.]]
</ol></li>

==Section 9.3. Application==
===9.3.1. Guarantee Term Requirements===
====9.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====9.3.1.2. Reserved====

===9.3.2. All Systems===
====9.3.2.1. Preparation of Substrate====

<ol>
<li>All supporting Decks must be acceptable to the manufacturer and must be prepared according to the requirements published in the applicable RGC Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.3.2.1._Preparation_of_Substrate Article 9.3.2.1.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.3.2.1._Preparation_of_Substrate Article 9.3.2.1.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>In addition to the above, the following requirements apply:
<ol>
<li>Pitted, honey-combed surfaces, or surfaces with a Concrete Surface Profile (CSP) greater than 5 must be repaired by others before the membrane application, following acceptable repair practices (e.g., International Concrete Repair Institute technical guidelines, including “210.4R-2021 (PDF) - Guide for Nondestructive Evaluation Methods for Condition Assessment, Repair, and Performance Monitoring of Concrete Structures”).
<li>Concrete ''decks'', ''walls'', ''curbs'' and equipment pads are not to receive adhered waterproofing for a minimum of 28 days after pouring unless expressly instructed in writing by the Project Structural Engineer; ''decks'' formed with shot-crete and lightweight insulating concrete are not acceptable substrates for waterproofing under the RoofStar Guarantee Program (See [[#2.1.5.2. Concrete Decks | Article 2.1.5.2.]]).
<li>The moisture content levels of concrete surfaces, Decks, walls, curbs and equipment pad surfaces, must strictly comply with the membrane manufacturer’s published moisture level application limitations.
<li>All concrete surfaces to receive adhered waterproofing shall be structurally sound, water cured, finished to a Concrete Surface Profile (CSP) from 3 to 5, have a light hair broom finish or be prepared by mechanical means and shall be primed, when applicable, with a membrane ''manufacturer’s'' approved primer (See [[Notes to GLW Standard#A-9.3.2.2.(2) | Note A-9.3.2.2. (2))]].
<li>''Curbs'', blocking, and nailing strips should be installed where required prior to the waterproofing ''Contractor's'' acceptance of the ''deck''.
<li>Pre-cast panels, post-stressed beams, or “T” and cavity ''decks'' shall have a minimum 50mm (2”) concrete topping applied over the ''deck'' prior to the application of the waterproofing membranes.
<li>Where a difference exists in the levels of adjacent surfaces, the general contractor or others shall install approved non-shrink grout or ground to match level of adjacent surfaces.
<li>Grouting or grinding shall be feathered on the lower surface a minimum distance of twelve times the amount of the vertical differential.
</li></ol>
</li></ol>

====9.3.2.2. Preparation of Waterproofing System Materials====

<ol>
<li>SBS membranes must be unrolled, prepared, and conditioned for installation, as required by the manufacturer.
<li>Product cakes of rubberized asphalt must be
<ol>
<li>heated in a double-jacketed oil bath or hot-air melter to a temperature specified by the ''manufacturer'', and shall not be heated beyond the specified maximum,
<li>maintained at a safe operating temperature, established by the ''manufacturer'', and
<li>continually agitated until installed; avoid heating and agitating the same material for more than six hours.
</li></ol>
</li></ol>

====9.3.2.3. General Requirements for Membrane Application====

<ol>
<li>Membranes shall be installed according to the general and specific requirements of Sub-section 9.3.2. in the applicable RGC Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.3.2._All_Systems Subsection 9.3.2.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.3.2.1._Preparation_of_Substrate Subsection 9.3.2.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
</li></ol>

====9.3.2.4. Cold and Inclement Weather Application====

<ol>
<li>SBS membrane installed during cold weather must follow the membrane ''manufacturer’s'' guidelines for storage and membrane conditioning.
<li>Hot fluid-applied rubberized asphalt shall conform to the following requirements, replicated here from [https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.3.2.4._Cold_and_Inclement_Weather_Application Article 9.3.2.4.] of "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs”
<ol>
<li>Installation during cold weather must follow the manufacturer’s guidelines for storage and membrane conditioning.
<li>When permitted by the ''manufacturer'', membranes may be applied in ambient air temperatures lower than -18⁰ C (0⁰ F), but application below -18⁰ C is not recommended.
<li>Membranes shall not be installed during inclement weather unless expressly permitted by the ''manufacturer'', in writing.
</li></ol>
</li></ol>

====9.3.2.5. Securement on Slopes====

<ol>
<li>''Waterproofing systems'' installed on slopes greater than 1:6 (2” in 12”) are permissible only with a written Variance from the '''''Guarantor'''''.
</li></ol>

====9.3.2.6. Reserved====

====9.3.2.7. Protection of Membranes====

<ol>
<li>Membranes shall be protected according to the general and specific requirements of Sub-section 9.3.2. in the applicable RGC Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.3.2._All_Systems Article 9.3.2.7.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.3.2.1._Preparation_of_Substrate Article 9.3.2.7.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>Membrane protection shall conform to the material requirements in [[#9.2.1.3. Protection Materials | Article 9.2.1.3.]] and shall be completely installed and secured
<ol>
<li>before any construction traffic is permitted on the ''project'' (this prohibition does not apply to workers of the waterproofing trade or moisture monitoring technicians), and
<li>before anyone other than the ''Contractor'' installs any ''overburden''.
</li></ol>
<li>Protection materials shall be installed with tightly fitting butt joints.
<li>Filtration materials shall be overlapped and secured behind linear metal flashings.
</li></ol>

====9.3.2.8. Transitions with Water-shedding Systems====

<ol>
<li>Where slopes less than 1:16 (3/4" in 12") intersect a ''water-shedding system'', the ''waterproofing system'' must be designed to extend up the ''water-shedding system'' slope as described in [[#10.3.7.2. Intersections with Water-Shedding Roofs | Article 10.3.7.2.]], using methods conforming to the general application requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]]
</li></ol>

====9.3.2.9. Walkways====

<ol>
<li>Any walkway pads or supports capable of absorbing solar radiation must be installed on a non-bonding slip sheet, to protect the membrane from damage by heat.
<li>When pavers are used as the walkway material, they must be
<ol>
<li>spaced no closer than 3.18 mm (1/8″),
<li>supported by non-abrasive pads or proprietary pedestals providing a minimum of 12.7 mm (1/2″) of vertical separation to permit adequate airflow and leveling (Slip sheets under pedestals may be necessary to prevent membrane abrasion), and
<li>secured against displacement by wind.
</li></ol>
</li></ol>

===9.3.3. Membrane Application Methods===
(The requirements in [[#9.3.2. All Systems | Subsection 9.3.2., "All Systems"]], shall be read together with the following article)

====9.3.3.1. Additional Requirements for SBS-modified Bituminous Membranes====

<ol>
<li>The application of the following membrane types shall follow the referenced requirements in the “RGC Standard for SBS-modified Bitumen Membrane Roofs”:
<ol>
<li>Self-adhered and Cold-processed membranes shall be installed to conform to the requirements of [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.3.3.1._Self-adhered_and_Cold-processed_Membranes Article 9.3.3.1.]
<li>Hot Asphalt-adhered membranes shall be installed to conform to the requirements of [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.3.3.3._Hot_Asphalt-adhered_Membranes Article 9.3.3.3.]
<li>Torch-applied membranes shall be installed to conform to the requirements of [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.3.3.4._Torch-applied_Membranes Article 9.3.3.4.]
<li>Liquid membrane systems accepted for field application as a second layer in a multi-ply SBS-modified bituminous membrane system shall be installed to conform to the requirements of [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.3.3.5._Liquid_Membranes_.28Field_Application.29 Article 9.3.3.5.]
</li></ol>
</li></ol>

===9.3.4. Reserved===

===9.3.5. Uninsulated Systems===
(The requirements in [[#9.3.2. All Systems | Subsection 9.3.2., "All Systems"]], shall be read together with the following articles)

====9.3.5.1. Reserved====

====9.3.5.2. Membranes Installed on Concrete====

<ol>
<li>Concrete ''decks'' shall be prepared as required in [[#9.3.2.1. Preparation of Substrate | Article 9.3.2.1.]], the application of the primary membrane shall conform to the general requirements in [[#9.3.2.3. General Requirements for Membrane Application | Article 9.3.2.3.]] and (for SBS-modified bituminous membranes) the specific requirements in [[#9.3.3.1. Additional Requirements for SBS-modified Bituminous Membranes | Article 9.3.3.1.]]
</li></ol>

====9.3.5.3. Reserved====

====9.3.5.4. Reserved====

====9.3.5.5. Reserved====

====9.3.5.6. Membrane Protection====
<ol>
<li>Installed membranes must be protected from damage as soon as possible after integrity testing (Refer to [[#9.3.2.7. Protection of Membranes | Article 9.3.2.7.]] for general requirements).
</li></ol>

===9.3.6. Protected Waterproofing Systems===
(The requirements in [[#9.3.2. All Systems | Subsection 9.3.2., "All Systems"]], shall be read together with the following articles)

====9.3.6.1. Reserved====

====9.3.6.2. Membrane Protection====

<ol>
<li>Installed membranes must be protected from damage as soon as possible after integrity testing (Refer to [[#9.3.2.7. Protection of Membranes | Article 9.3.2.7.]] for general requirements).
</ol></li>

====9.3.6.3. Procurement and Installation of Other Materials====

<ol>
<li>All components of a ''waterproofing system'', including the gravel or paver ballast, must be supplied and installed by the ''Contractor''.
</ol></li>

<hr>

<div id=PART_10></div>

=Part 10 - Perimeters and Walls=
==Section 10.1. Design==
===10.1.1. General===
====10.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====10.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===10.1.2. Guarantee Term Requirements===
====10.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====10.1.2.2. Reserved====

===10.1.3. All Systems===
====10.1.3.1. General Requirements====

<ol>
<li>The ''Design Authority'' is responsible to specify the connections between the ''waterproofing system'' and ''walls'' or other building components, particularly where the ''continuity'' of air, vapour and water-resistive ''control layers'' is critical or required by Code (See [[#Part 6 - Air and Vapour Controls | Part 6, "Air and Vapour Controls"]]).
<li>''Projects'' must follow proper sequencing; materials must positively integrate (“shingle fashion”) with other materials, ''systems'', or ''assemblies'', including those installed by other trades.
<li>''Wall'' surfaces must be suitable to receive waterproofing materials, or they must be covered with an accepted overlay panel material listed in [[Division_C | Division C]].
<li>Where the structural slab at grade and an adjoining ''wall'' are constructed of dissimilar materials (i.e., concrete ''deck'' joined to a steel wall), differing expansion and contraction rates for the two materials may adversely affect the ''waterproofing system'' and, in particular, the field and flashing membranes, and therefore it is incumbent upon the ''Design Authority'' to consult the ''manufacturer's'' literature and specify the correct materials for each particular ''deck-wall'' intersection.
</li></ol>

====10.1.3.2. Membrane Flashing====

<ol>
<li>All changes in plane in the ''waterproofing system'', and all intersections between the system field and edges, ''walls'', or ''parapets'', must be flashed using the means and methods described and required in Article 10.1.3.2. of the applicable RGC Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#10.1.3.2._Membrane_Flashing Article 10.1.3.2.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#10.1.3.2._Membrane_Flashing Article 10.1.3.2.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>No UV-sensitive membrane may be left exposed and must be fully protected with
<ol>
<li>the manufacturer’s proprietary protection material, or
<li>base metal flashings.
</li></ol>
<li>All other specifications shall follow the application requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]]
<li>Sheet membrane flashing must be self-adhered, adhered with adhesives, or with torch-applied heat, and shall conform to the requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]]
<li>Linear metal flashing, or a RoofStar-accepted, fleece-reinforced 2-component polymethyl methacrylate (PMMA) liquid membrane flashing, is required at all edges, upper membrane terminations, curb tops, and at the tops of ''parapets'', to protect sheet membrane flashing from damage.
<li>Linear metal flashing used for the termination of sheet membrane flashing plies shall be installed in keeping with [[#Article 13.1.3.3. Securement | Article 13.1.3.3. Securement]].
<li>Sheet membrane flashing must be protected from damage caused by foot traffic or shifting coverings, using base metal flashing or other methods acceptable to the '''''Guarantor'''''.
<li>Where a ''waterproofing assembly'' allows water to freely drain off the edge, and that assembly adjoins a ''wall'', a cricket or diverter should be installed at the ''deck'' edge to prevent water intrusion behind vulnerable wall finishes.
</li></ol>

===10.1.4. Perimeter Details, Walls, and Openings===
(The requirements in [[#10.1.3. All Systems | Subsection 10.1.3., "All Systems"]], shall be read together with the following Articles)

====10.1.4.1. Parapets====

<ol>
<li>While most ''waterproofing assemblies'' drain over the ''deck'' edge (See [[#10.1.4.2. Deck (Slab) Edge | Article 10.1.4.2.]]), when ''parapets'' are specified or required they may be waterproofed before a coping, its membrane, and metal coping (cap) flashing are installed, but the coping will be excluded from coverage unless the ''parapet'' membranes are carried onto and over the coping in accordance with the application requirements described in [[#10.3.4. Perimeter Details, Walls, and Opening | Subsection 10.3.4.]]
<li>On structural ''decks'' exposed to wind load, where ''overburden'' or ballast extends to the ''deck'' edge, ''parapets'' must be designed to retain the material against wind scouring, but in any event, they shall be no less than 203.2 mm (8”) in height when measured from the top of the ''finished system surface''.
<li>With the exception of Sentence (1), ''parapets'' are optional unless required by Code or the Authority Having Jurisdiction, but when a ''parapet'' is specified or otherwise required by this Standard, it must be no less than 127.0 mm (5") in height, measured from the ''finished system surface'' to the inside top edge of the ''parapet'' (this height requirement facilitates proper metal cap flashing securement) (Ref. [[#10.3.4. Perimeter Details, Walls, and Opening | Subsection 10.3.4.]]; also see [[#13.3.2.3. Cap Flashing, Counterflashing, and Reglet Flashing | Article 13.3.2.3. Cap Flashing, Counterflashing, and Reglet Flashing]]).
<li>A ''parapet'' ''wall'' measuring no less than 203.2 mm (8”) is required at the edge of the ''deck'' where the deck is not supported by an adjacent ''wall'', and an ''expansion joint'' ([[#10.1.6.1. Expansion Joints | Article 10.1.6.1.]]) shall join the two at the top of the parapet (See the Expansion Joint (Wall) construction detail).
<li>''Parapets'' with cavities must be designed with consideration for ventilation.
<li>All ''parapet'' copings that form part of the ''Contractor’s'' scope of work must provide solid support for metal coping (cap) flashings and shall be suitable to receive mechanical fasteners (Ref. [[#13.1.3.6. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.1.3.6.]]; also see [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]).
<li>When the width of any ''parapet'' exceeds 101.6 mm (4"), the coping (installed by other trades) must
<ol>
<li>slope toward the waterproofing side of the ''parapet'' ''wall'', and shall
<li>be sloped to meet the minimum requirements for metal coping (cap) flashing in '''Table 13.1.3.4.-A''', [[#13.1.3.4. Gauge, Dimension Limitations, and Seams | Article 13.1.3.4.]]
</li></ol>
<li>Membranes specified for ''parapets'' with a pre-cast or stone coping must be at least 2.5 mm thick and shall be manufactured with a sanded top surface.
</li></ol>

====10.1.4.2. Deck (Slab) Edges====

<ol>
<li>Where a ''waterproofing assembly'' ''deck'' terminates flush with the drainage plane, the ''waterproofing system'' must be designed to seal and waterproof the transitions between the horizontal ''deck'' and any vertical ''walls'' below grade.
</li></ol>

====10.1.4.3. Tall Parapets====

<ol>
<li>When a ''parapet'' higher than 609.6 mm (24") (a tall parapet) is specified as part of the ''Contractor’s'' scope of work,
<ol>
<li>membranes specified for the vertical surface of the ''wall'', above the primary waterproofing membrane flashing, must conform to the requirements in [[#10.2.1.1. Flashing Membranes | Article 10.2.1.1.]], and
<li>additional mechanical securement shall conform to the requirements in this Part, or to the requirements of the ''manufacturer'', whichever is greater.
</li></ol>
<li>All ''waterproofing system'' intersections with ''walls'' shall conform to the requirements in [[#10.1.3. All Systems | Subsection 10.1.3. All Systems]], and shall maintain continuity with the ''wall'' control layers for air, vapour, and water.
<li>''Tall parapets'' with cavities must be designed with consideration for ventilation.
</li></ol>

====10.1.4.4. Reserved====

====10.1.4.5. Doors, Windows, and Wall Openings====

<ol>
<li>Rough openings formed or framed in walls to accommodate doors, windows, curtain-wall assemblies, or other penetrations (i.e., ventilation grilles), should be oversized to allow for the build-up of ''waterproofing system'' flashing membrane.
<li>Low-clearance openings (rough openings less than 203.2 mm (8") in height, measured from the ''finished system surface'')
<ol>
<li>should be avoided, particularly when designing a ''waterproofing system'' to support any type of ''overburden'', and
<li>are not recommended because of their propensity to overflow (water overflowing through a low opening is not covered by a '''''RoofStar Guarantee''''').
</li></ol>
<li>When a low-clearance opening is unavoidable or specified (i.e., to comply with Code for level access and egress),
<ol>
<li>the ''deck'' must be sloped away from the opening,
<li>the rough opening shall not be less than 101.6 mm (4") above the ''drainage plane'' and must be waterproofed in keeping with the requirements in [[#10.3.4.5. Doors, Windows, and Wall Openings | Article 10.3.4.5.]],
<li>the ''drainage plane'' must be free of obstructions and materials capable of displacing water,
<li>the low-clearance opening should be protected by an overhang wherever practical, to minimize water intrusion that occurs from wind-driven rain or from snow accumulation, and
<li>the opening must be protected by an ''overflow drain'', if drainage over the ''deck'' edge is blocked by a ''parapet'',
<ol>
<li>situated on the same roof area as the low-clearance opening,
<li>located at least 25.4 mm (1") below the elevation of the rough opening, and
<li>conforming to the spacing and capacities required by the "National Plumbing Code of Canada", Division B, [https://nrc-publications.canada.ca/eng/view/ft/?id=6e7cabf5-d83e-4efd-9a1c-6515fc7cdc71#%5B%7B%22num%22%3A310%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C250%2Cnull%5D Article 2.4.10.4.] (See also [[#11.1.3.1. Principles of Design | Article 11.1.3.1., "Principles of Design"]]).
</li></ol>
</li></ol>
<li>When the building interior transitions to an accessible surface through a flush door opening,
<ol>
<li>the design shall conform to the requirements in this Part, and to [[#14.1.3.11. Wearing Surfaces | Article 14.1.3.11.]], and
<li>the membrane installed over the rough opening sill must be protected from abrasion damage as described in [[#10.3.4.5. Doors, Windows, and Wall Openings | Sentence 10.3.4.5.(6)]] below.
</li></ol>
</li></ol>

===10.1.5. Reserved===
===10.1.6. Expansion and Control Joints===
(The requirements in [[#10.1.3. All Systems | Subsection 10.1.3., "All Systems"]], shall be read together with the following Articles)

====10.1.6.1. Expansion Joints====
(See [[Notes to GLW Standard#A-10.1.6.1.| Note A-10.1.6.1.]])

<ol>
<li>The design and placement of structural ''expansion joints'' is the responsibility of the ''Design Authority'', but they must be considered wherever
<ol>
<li>expansion or contraction joints are provided in the structural assembly,
<li>differential movement between structural components may occur (i.e., where a ''wall'' and the ''deck'' are separately supported, or
<li>seismic movement is anticipated.
</li></ol>
<li>The location of ''expansion joints'' must be clearly indicated on the drawings, drawn in detail, and included in the specifications.
<li>Proprietary elastomeric ''expansion joint'' systems are covered under the '''''RoofStar Guarantee Program''''' as an accessory to the accepted primary material and (except where the condition of Sentence 10.1.4.1.(6) applies) may be used at the drainage plane provided the expansion joint system is
<ol>
<li>manufactured with an EPDM-based core and flanges that can be fully bonded to the primary membrane,
<li>accepted for use in the '''''RoofStar Guarantee Program''''',
<li>compatible with the waterproofing membrane and acceptable to the membrane ''manufacturer'',
<li>designed and manufactured to accommodate building movements of at least 500% elongation at -40° C (-40° F) across its length and at all vulcanized points,
<li>factory-fabricated by means of vulcanization,
<li>manufactured as one piece, complete with all joints, details and connections,
<li>bonded with the primary membrane in a manner acceptable to the manufacturers of both the expansion joint and the membrane to which it will be bonded, and
<li>protected from damage, including foot traffic.
</li></ol>
<li>Field splicing of proprietary elastomeric expansion joints is permitted only when made with a machine acceptable to the expansion joint manufacturer.
<li>Elastomeric expansion joint systems that are not proprietary to the membrane manufacturer are not covered by a '''''RoofStar Guarantee''''' and must be built as a raised structure with a minimum height of 203.2 mm (8"), measured from the ''finished system surface''.
</li></ol>

====10.1.6.2. Control Joints (System Dividers)====
(See [[Notes to GLW Standard#A-10.1.6.2. | Note A-10.1.6.2.]]; also see [[#10.3.6.2. Control Joints (System Dividers) | Article 10.3.6.2.]])

<ol>
<li>The ''Design Authority'' is responsible
<ol>
<li>to determine the need for ''control joints'' (system dividers), and
<li>to specify their location and design.
</li></ol>
<li>The ''Design Authority'' must consider specifying ''control joints''
<ol>
<li>when a single system area exceed 61 m (approx. 200’) in length and the membrane is limited in its flexibility (consult the manufacturer for their recommendations),
<li>for buildings in climate zones with significant seasonal temperature swings,
<li>where an addition joins an existing building,
<li>where the ''deck'' type changes (i.e., steel transitions to wood),
<li>where insulation in the ''waterproofing system'' changes thickness,
<li>where the ''deck'' changes in elevation, and
<li>when interior heating conditions change.
</li></ol>
<li>Specified and detailed ''control joints'' should be located at the high points of the assembly, so that water drains away from both sides of the divider and is not impeded by it.
<li>''Control joints'' must be
<ol>
<li>constructed as a raised divider,
<li>sloped on the top face (this may be bi-directional, or only toward one side),
<li>enveloped with no fewer than two plies of sheet membrane flashing,
<li>at least 127 mm (5”) in height, measured from the ''finished system surface'', when covered with a metal cap flashing (this minimum may be reduced to 101.4 mm (4”) when the metal cap flashing is omitted), and
<li>waterproofed in keeping the requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]], together with the ''manufacturer’s'' published specifications for the detail.
</li></ol>
<li>Unless otherwise approved by the '''''Guarantor''''', ''control joints'' may be specified to divide a new ''system'' (addition) from existing ''systems'' (Ref. [[#1.1.4.5. Tie-ins, Additions, and Alterations to Existing Roofing | Article 1.1.4.5.]]).
</li></ol>

===10.1.7. Intersections with Other Systems===
(The requirements in [[#10.1.3. All Systems | Subsection 10.1.3., "All Systems"]], shall be read together with the following Articles)

====10.1.7.1. Intersections with Water-shedding Systems====

<ol>
<li>Intersections with ''water-shedding systems'' must be designed according to the requirements in [[#10.3.7.2. Intersections with Water-Shedding Roofs | Article 10.3.7.2.]]
</li></ol>

====10.1.7.2. Reserved====

===10.1.8. Alternative Approaches for Membrane Flashing===
(The requirements in [[#10.1.3. All Systems | Subsection 10.1.3., "All Systems"]], shall be read together with the following Articles)

====10.1.8.1. Specifying Hazard-reduction Strategies====

<ol>
<li>The ''Design Authority'' should consider alternatives to heat-applied materials when the application process involves Hot Work (Ref. [[#1.1.3.5. Hot Works | Article 1.1.3.5.]]) and the substrate to which they will be applied is combustible, or when nearby structures, openings, or materials, present a fire hazard; in the alternative, choose a suitable separation or overlay material as protection from open flame.
<li>Self-adhering or adhesive-applied membranes as alternatives to heat-applied membranes are acceptable to the '''''Guarantor''''' and must also be acceptable to the ''manufacturer''.
<li>The application of materials to a combustible surface, using a torch, is strictly prohibited (Refer to [[#10.3.8. Alternative Approaches to Sheet Membrane Flashing | Sub-section 10.3.8., "Alternative Approaches to Sheet Membrane Flashing"]], for application requirements).
</li></ol>

==Section 10.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===10.2.1. Material Properties===
====10.2.1.1. Flashing Membranes====

<ol>
<li>Sheet membranes used to flash the intersection of the system field and perimeter ''walls'' must conform to the membrane requirements found in [[#9.2.1.1. Membrane Composition, Thickness, and Selection | Article 9.2.1.1.]] of the related ''waterproofing roof'' Standard.
<li>When waterproofing a ''tall parapet'' above the primary membrane system is specified as part of the ''Contractor's'' scope of work (Ref. [[#10.1.4.3. Tall Parapets | Article 10.1.4.3.]] and [[#10.3.4.3. Tall Parapets | Article 10.3.4.3.]]), the membrane shall
<ol>
<li>be compatible with the primary membrane,
<li>be self-adhering,
<li>be declared suitable for the application by the ''manufacturer'' (see [[Notes to GLW Standard#A-10.2.1.1.(2)(3) | Note A-10.2.1.1.(2)(3)]]),
<li>possess properties consistent with the design and characteristics of the ''wall'' assembly,
<li>possess a high softening point and a minimum flow temperature of 87.7°C (190°F) (ASTM D5147, "Standard Test Methods for Sampling and Testing Modified Bituminous Sheet Material") and
<li>have a thickness no less than 1 mm (.040”).
</li></ol>
<li>Some membranes may be susceptible to damage from bird droppings, pet urine, and chemical contamination (oils, solvents, or any discharge from a mechanical unit), and therefore they should be protected using measures designed in consultation with the ''manufacturer''.
<li>Fleece-reinforced liquid membrane flashing systems must be accepted by the '''''Guarantor''''' and proprietary to, or accepted by, the ''manufacturer''.
</li></ol>

====10.2.1.2. Linear Metal Flashing====

<ol>
<li>''Linear metal flashing'' incorporated into perimeters and ''walls'' of the ''waterproofing system'' must conform to the materials and fabrication requirements in [[#Part 13 - Linear Metal Flashing | Part 13, "Linear Metal Flashing"]].
</li></ol>

====10.2.1.3. Reserved====
====10.2.1.4. Sealants====

<ol>
<li>Sealants applied to ''linear metal flashing'', where sheet membrane flashing is terminated, shall conform to the requirements in [[#13.2.1.4. Sealants | Article 13.2.1.4.]]
</li></ol>

===10.2.2. Securement Materials===
====10.2.2.1. Fasteners====

<ol>
<li>Where fasteners are used in the waterproofing system''
<ol>
<li>to secure waterproofing materials, they shall conform to the requirements in [[#3.2.2.1. Fasteners | Article 3.2.2.1.]] of the related ''waterproofing roof'' Standard.
<li>to secure ''linear metal flashings'', they shall conform to the requirements in [[#13.2.1.4. Sealants | Article 13.2.1.4.]]
</li></ol>
</li></ol>

==Section 10.3. Application==
===10.3.1. Guarantee Term Requirements===
====10.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====10.3.1.2. Reserved====

===10.3.2. All Systems===
====10.3.2.1. Substrate Preparation====

<ol>
<li>All wall surfaces to which waterproofing materials must be installed (including Concrete Masonry Unit (CMU)) shall be
<ol>
<li>prepared in like manner to the ''deck'' (Ref. [[#9.3.2.1. Preparation of Substrate | Article 9.3.2.1.]]) and declared suitable by the ''manufacturer'', or
<li>covered with a RoofStar-accepted overlay panel conforming to the material requirements in [[#5.2.1.3. Overlays for Walls | Article 5.2.1.3.]] and installed to conform to [[#5.3.2.5. Support, Arrangement, and Securement of Wall Overlays | Article 5.3.2.5.]]
</li></ol>
<li>Wherever the primary membrane will be applied, gaps or cracks that exceed 1.59 mm (1/16”) in width must be reinforced prior to the application of the membrane using the ''manufacturer’s'' proprietary reinforcement material.
</li></ol>

====10.3.2.2. Material Preparation====

<ol>
<li>Membranes preparation shall conform to the general and specific requirements of Article 10.3.2.2. in the applicable RGC Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#10.3.2.2._Material_Preparation Article 10.3.2.2.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#10.3.2.2._Material_Preparation Article 10.3.2.2.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>SBS-modified bitumen membrane flashing shall be prepared following the requirements in the "RGC Standard for SBS-modified Bitumen Membrane Roofs".
</li></ol>

====10.3.2.3. General Application Requirements for Perimeters and Walls====

<ol>
<li>The general application requirements for perimeters and walls shall conform to the general and specific requirements of Article 10.3.2.3. in the applicable RGC Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#10.3.2.3._General_Application_Requirements_for_Perimeters_and_Walls Article 10.3.2.3.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#10.3.2.3._General_Application_Requirements_for_Perimeters_and_Walls Article 10.3.2.3.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>Cold joints between concrete pours, at transitions between horizontal ''decks'' and vertical ''walls'' below grade, shall be sealed and covered with waterproofing membrane flashing that is
<ol>
<li>compatible with any foundation or ''wall'' waterproofing or damp proofing, and
<li>extends at least 203.2 mm (8”) past any joints between the ''deck'' and a ''wall''.
</li></ol>
<li>Whenever materials at ''deck'' and below grade ''wall'' transitions are not compatible with one another, sealants and mechanically attached termination bars are acceptable, to create a watertight lap a minimum 203.2 mm (8") in width.
<li>When damp proofing of below-grade ''walls'' is completed before waterproofing of the structural slab at grade, or the backfill against blind-side waterproofing prevents a below-grade seal by the ''Contractor'', a waterproofing membrane-compatible membrane should be installed by the damp proofing contractor and extended onto the horizontal plane of the slab, to permit a positively draining, watertight seal.
</li></ol>
</li></ol>

====10.3.2.4. Protection of Membranes====

<ol>
<li>All installed membranes must be protected from splashed or dripped primer (applicable to all trades).
<li>Membrane flashing must be protected from damage caused by UV radiation, foot traffic, or shifting coverings, using a ''linear metal flashing'' (i.e., base flashing) or other methods acceptable to the '''''Guarantor'''''.
<li>Protection materials shall be installed as required in [[#9.3.2.7. Protection of Membranes | Article 9.3.2.7.]]
<li>When an integrity scan is not required because the conditions in [[#1.1.3.3. Membrane Integrity Testing | Article 1.1.3.3.]] have been satisfied, the ''Contractor'' shall nevertheless protect installed field membranes and membrane flashing, immediately after installation, with RoofStar-accepted membrane protection materials.
</li></ol>

===10.3.3. Additional Requirements for Membrane Flashing===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.3.1. Membrane Flashing for SBS-modified Bituminous Sheet Membranes====

<ol>
<li>The application of permitted SBS-modified bituminous sheet membrane flashing shall conform to the general and specific requirements of Subsection 10.3.3. in the applicable RGC Standard for roofs, and shall be read together with Subsection 10.3.2. in the same Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#10.3.3._Additional_Requirements_for_Membrane_Flashing Subsection 10.3.3.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#10.3.3._Additional_Requirements_for_Membrane_Flashing Subsection 10.3.3.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
</li></ol>

===10.3.4. Perimeter Details, Walls, and Openings===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.4.1. Additional Requirements for Parapets, Walls, and Openings in Walls====

<ol>
<li>The additional application requirements for waterproofing materials at the perimeter, on walls, and at openings in walls, shall conform to the general and specific requirements in Articles 10.3.4.1., 10.3.4.3, and 10.3.4.5. of Subsection 10.3.4. in the applicable RGC Standard for roofs and shall be read together with Subsection 10.3.2. in the same Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#10.3.4._Perimeter_Details.2C_High_Walls.2C_and_Openings Subsection 10.3.4.] in the RGC Standard for SBS-modified Bituminous Membrane Roofs.
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#10.3.4._Perimeter_Details.2C_High_Walls.2C_and_Openings Subsection 10.3.4.] in the RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs.
</li></ol>
</li></ol>

===10.3.5. Reserved===
===10.3.6. Expansion and Control Joints===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.6.1. Expansion Joints====
(See [[#10.1.6.1. Expansion Joints | Article 10.1.6.1.]])

<ol>
<li>When proprietary elastomeric ''expansion joint'' systems in the ''drainage plane'' are specified, the bond between the sheet membrane flashing and the ''expansion joint'' system must be acceptable to both the ''manufacturer'' and the supplier of the expansion joint system (Ref. [[#10.1.6.1. Expansion Joints | Article 10.1.6.1.]] for design requirements).
<li>Backer rods, insulation, or any other materials installed inside the cavity below the expansion joint may be installed by the ''Contractor'' but are not considered part of the system and therefore are excluded from coverage under a '''''RoofStar Guarantee'''''.
<li>Field splicing of proprietary elastomeric ''expansion joints'' is permissible only when made with a machine acceptable to the expansion joint manufacturer.

</li></ol>

====10.3.6.2. Control Joints (Roof Dividers)====

<ol>
<li>''Control joints'' must be waterproofed in keeping the requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]], together with the ''manufacturer’s'' published specifications for the detail.
</li></ol>

===10.3.7. Intersections with Other Systems===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.7.1. Compatibility of Materials====

<ol>
<li>Where a ''waterproofing system'' intersects with a different system, materials must be
<ol>
<li>compatible with each other, or
<li>must be separated from contact by an intermediate separation layer.
</li></ol>
</li></ol>

====10.3.7.2. Intersections with Water-Shedding Systems====
(See [[Notes to GLW Standard#A-10.3.7.2. | Note A-10.3.7.2.]])

<ol>
<li>When a ''waterproofing system'' transitions up a slope and underlaps a ''water-shedding system'',
<ol>
<li>sheet membrane flashing must extend up the ''water-shedding roof system'' slope at least
<ol>
<li>152.4 mm (6”), plus at least 76.2 mm (3”) for the overlap by the ''water-shedding system'', when measured vertically from the maximum water level, and
<li>304.8 mm (12”) plus at least 76.2 mm (3”) for the overlap by the ''water-shedding system'', when measured vertically from the maximum water level, in regions with typical heavy snow,
</li></ol>
<li>the termination of the ''waterproofing system'' sheet membrane flashing on the slope must be mechanically secured, separately from the ''water-shedding system'', and
<li>the overlapping adjoining system materials must conform to the requirements for the specific ''water-shedding system''.
</li></ol>
</li></ol>
</li></ol>

====10.3.7.3. Reserved====

===10.3.8. Alternative Approaches to Sheet Membrane Flashing===

====10.3.8.1. General====

<ol>
<li>When field membranes or flashing plies are heat-welded, or when construction sequencing requires strategies for mitigating fire risk, the ''Contractor'' is responsible to assess risks and should consider the means and methods in [[#10.3.8. Alternative Approaches to Sheet Membrane Flashing | Subsection 10.3.8.]] of the "RGC Standard for SBS-modified Bitumen Membrane Roofs.":
</li></ol>

<hr>

<div id=PART_11></div>

=Part 11 - Drainage=
<div id="DRAIN_DESIGN"></div>
==Section 11.1. Design==
===11.1.1. General===
====11.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====11.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Bi-Level Drain'' means a drain with two inlets, each at a different elevation; these drains are typically used on roofs supporting ''overburden'' and are not to be used as an ''overflow''.
<li>''Drain leader'', as used in this Standard, means "a pipe that is installed to carry ''storm water'' from a ''waterproofing assembly'' to a ''storm building drain'' or ''sewer'' or other place of disposal” ("British Columbia Plumbing Code", Division A, [https://free.bcpublications.ca/civix/document/id/public/bcpc2018/bcpc_2018dap1s14 Article 1.4.1.2., "Defined Terms"]).
<li>''Flanged insert drain'' means a ''primary drain''
<ol>
<li>with a flat, broad flange that encircles, and is manufactured from the same material as, the drain opening or bowl,
<li>that is spun or hot-welded (not cast),
<li>that typically is secured to the ''waterproofing assembly'' with screw-type mechanical fasteners, and
<li>that is manufactured with a short length of drain pipe ("drain stem"), which is inserted into a ''drain leader'' and sealed against back-flow using a compression seal.
</li></ol>
<li>''Overflow drain'' ("overflow") means a ''secondary drain''
<ol>
<li>that serves as a safeguard when ''primary drains'' fail, and
<li>which may be located in the ''waterproofing system'' field (for example, as a secondary drain) or at the perimeter of the ''waterproofing assembly''.
</li></ol>
<li>''Primary drain'' means the primary means the primary collector of storm water for discharge, typically into a ''drain leader''.
<li>''Drain'' means a fitting or device that is installed in a ''waterproofing assembly'' or roof to permit storm water to discharge into a ''drain leader''. (adapted from the "British Columbia Plumbing Code", Division A, [https://free.bcpublications.ca/civix/document/id/public/bcpc2018/bcpc_2018dap1s14 Article 1.4.1.2., "Defined Terms"]).
<li>''Scupper drain'' ("scupper"), which is primarily used on roofs, means an open or closed drain that conveys water laterally from one area of a ''project'' to another, or from the ''project'' directly to the exterior of the building.
<li>''Secondary drain'' means a drain connected to a separate drainage system, typically situated at a higher elevation than a ''primary drain''. An ''overflow drain'' is a type of ''secondary drain''.
</li></ol>
</li></ol>

===11.1.2. Guarantee Term Requirements===
====11.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====11.1.2.2. Reserved====

====11.1.2.3. Reserved====

===11.1.3. All Systems===
====11.1.3.1. Principles of Design====

<ol>
<li>The ''Design Authority'' is responsible for the design of ''project'' drainage and ''continuity'' of ''control layers'', where these intersect with any part of the designed drainage system (Ref. [[#3.1.5.1. Securement against Specified Wind Loads | Article 3.1.5.1.]]; also see [[#6.1.3.2. Continuity of Control Layers | Article 6.1.3.2.]]).
<li>Notwithstanding that most ''waterproofing assemblies'' drain over an edge at grade, when the design requires mechanical drainage, the ''Design Authority'' must design the drainage system with ''drains'' and ''overflows'' sized to accommodate the anticipated precipitation for the building.
<li>Whereas the Building Code may not require the inclusion of ''overflows'' in all circumstances, and the RGC Standards require ''overflows'' in some locations (e.g., in membrane-lined gutters), the incorporation of properly sized and located overflows is strongly encouraged (Also see [[#11.1.4.2. Scuppers and Overflows | Article 11.1.4.2.]]).
<li>The size (flow rate) of ''drains'' and ''overflows'' must be determined using the "British Columbia Building Code" and "British Columbia Plumbing Code", with attention given to both average and large rainfall events (for rainfall capacities, refer to the [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbacr2 "British Columbia Building Code", Div. B, Appendix C, "Table C-2"], which lists rainfall loads using specific reference locations throughout the province (See [[#11.1.3.2. Roof Drain Function and Location | Articles 11.1.3.2.]] and [[#11.1.4.2. Scuppers and Overflows | 11.1.4.2.]] for function and location).
<li>The ''Design Authority'' should coordinate the various disciplines (including, without limitation, mechanical (plumbing) and structural engineers) to calculate proper flow rates, head pressure, and structural supports, in anticipation of significant, short-duration rain events; consideration should be given to various design elements (listed without limitation)
<ol>
<li>''project'' slope (more slope theoretically increases drainage and lessens live loading from rainfall) (Ref. [[#2.1.3.1. General Requirements for Roof Slope | Article 2.1.3.1., "General Requirements for Roof Slope"]]),
<li>rainfall rates for primary and overflow drainage,
<li>''primary'' and ''overflow drain'' capacities,
<li>hydraulic head (pressure), and
<li>the location of the ''drainage plane'' (the ''drainage plane'' is not necessarily the same as the ''finished system surface'', and the location of the ''drainage plane'' may affect the determination of live loads, which should be accounted for as part of drainage design).
</li></ol>
<li>When a ''waterproofing assembly'' or ''water-shedding assembly'' is designed to drain off an edge, water may drain freely or be collected by means of an external or membrane gutter (See [[#11.1.4.3. Membrane Gutters | Article 11.1.4.3.]]) and drained onto a lower roof assembly.
<li>When a ''waterproofing system'' is fully or partially replaced, all flanged drains, ''scuppers'', and ''overflows'', together with internal drain-to-pipe compression seals, and seals exposed to water or ultraviolet light, must be replaced.
<li>If a flow control is present in an existing cast ''drain leader'', the flow control should be reinstalled.
<li>''Waterproofing assemblies'' that support a ''overburden'' or are secured with ballast must be designed to incorporate a ballast guard that surrounds the drain and promotes proper drainage.
</li></ol>

====11.1.3.2. Drain Function and Location====

<ol>
<li>''Drains'' must be used only for draining water.
<li>The use of ''bi-level drains'' with adequate openings for both surface and subsurface drainage are mandatory for all inaccessible ''waterproofing systems'' that utilize interior drainage systems with low permeable wearing courses (poured concrete, bricks, unit masonry and stone set in mortar beds).
<li>''Drains'' on new construction ''projects'' must be located at least 457.2 mm (18") away from any adjacent ''drain'', penetration, upstand, edge, or ''wall'' (the separation space is measured between openings, excluding the flange), but this requirement does not apply to ''overflow drains'', ''scupper drains'', and membrane gutters (Ref. [[#11.3.3.7. Scuppers and Overflows | Article 11.3.3.7.]] for minimum requirements applicable to ''scuppers'' and ''overflows'').
<li>Notwithstanding the requirements in Sentence (1), a cast iron ''roof drain'' with a sump receiver must be placed well away from any interference with drain securement.
<li>When a ''waterproofing system'' is replaced and existing ''drains'' do not comply with the spacing requirements in this Part, the ''Design Authority'' must submit a drawn detail for a review by the ''''''Guarantor'''''; the detail must incorporate the following requirements and principles, together with requirements in [[#11.3.3. Drains | Subsection 11.3.3.]]:
<ol>
<li>''Wall'' membrane flashings must not terminate under the clamping ring of a cast drain.
<li>The clamping ring of a cast drain must be fully seated to ensure the drain will function properly.
</ol></li>
</ol></li>

===11.1.4. Drains and Membrane Gutters===
(The requirements for [[#11.1.3. All Systems | Subsection 11.1.3., "All Systems"]], shall be read together with the following Articles)

====11.1.4.1. Cast Iron Roof Drains====

<ol>
<li>Cast iron ''drains'' may be
<ol>
<li>cast into a concrete slab, or
<li>secured with an under-deck clamp when the ''deck'' is steel.
</li></ol>
<li>Only cast iron ''drains'', and existing external couplers used to connect ''drains'' to leaders, may be re-used for ''waterproofing system'' replacement ''projects''.
</li></ol>

====11.1.4.2. Scuppers and Overflows====

<ol>
<li>A ''scupper drain'' may be used as a ''primary drain'', a ''secondary drain'', or as an ''overflow''.
<li>Overflows, which are emergency stormwater discharge outlets installed to activate when ''primary drains'' are blocked and to prevent structural damage,
<ol>
<li>should be located around the perimeter of a ''waterproofing assembly'', through ''parapets'' (recommended), but
<li>may be a ''secondary drain'' in the field provided it is plumbed in keeping with the “British Columbia Plumbing Code”, Div. B, Subsection 2.4.6 and Article 2.4.10.4. [[Notes to GLW Standard#A-11.1.4.2. | (See Note A-11.1.4.2.)]].
</li></ol>
<li>Where no ''overflows'' are specified, the building structure should be designed to carry the total load of water collected on the ''waterproofing assembly'', in the event of ''primary drain'' failure.
<li>''Overflows'' located at the perimeter of the roof must be
<ol>
<li>designed as open-wall ''scuppers'' for ''parapets'' measuring 152.4 mm (6”) or less in height (Ref. Construction Detail [[SBS Open-wall Scupper Drain | "Open-wall Scupper Drain"]]), or
<li>designed around the principles of a through-wall ''scupper'' when ''parapets'' are higher than 152.4 mm (6”) (Ref. Construction Detail [[SBS Through-wall Scupper Drain | "Through-wall Scupper Drain"]]), and (irrespective of design) shall be
<ol>
<li>located no higher than 101.6 mm (4”) above the ''drainage plane'' at the roof drain (See '''Figure 11.1.4.2.-A'''; also see [[Notes to GLW Standard#A-11.1.4.2. | Note A-11.1.4.2.]]),
<li>installed at least 25.4 mm (1”) lower than the lowest elevation of a door, window, or other low-clearance opening, to prevent water intrusion,
<li>situated so that they freely and visibly discharge storm water,
<li>protected with a ballast guard when the ''overflow'' is located below the ''finished system surface'', and
<li>specified to conform to the spacing and capacities required by the "National Plumbing Code of Canada", Division B, [https://nrc-publications.canada.ca/eng/view/ft/?id=6e7cabf5-d83e-4efd-9a1c-6515fc7cdc71#%5B%7B%22num%22%3A310%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C250%2Cnull%5D Article 2.4.10.4.] (See also [[#11.1.3.1. Principles of Design | Article 11.1.3.1., "Principles of Design"]]).
</li></ol>
</li></ol>
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 11.1.4.2.-A Overflow location relative drainage plane at primary drain''' Forming Part of Article 11.1.4.2. (Click to expand illustration)
|-
| [[File:Part 11 - Illustration - Figure 11.1.4.2.-A.png|link=https://rpm.rcabc.org/images/5/5b/Part_11_-_Illustration_-_Figure_11.1.4.2.-A.png | 600 px]]
|}
</li></ol>

====11.1.4.3. Reserved====

====11.1.4.4. Drains in Planters====

<ol>
<li>''Drains'' designed for structural planters must conform to the requirements in [https://rpm.rcabc.org/index.php?title=VRA_Standard#6.1.3.2._Planter_Drainage Article 6.1.3.2.] of the “RGC Standard for Vegetated Roofs”.
</ol></li>

==Section 11.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===11.2.1. Material Properties===
====11.2.1.1. General Requirements====

<ol>
<li>Except for cast iron ''drains'', which are usually supplied and installed by others, only new ''drains'' and penetration flashings listed in [[Division_C | Division C]] may be used.
<li>All ''drains'' and overflows must conform to CSA ASME A112.6.4-2022/CSA B79.4-2022, "Roof, deck, and balcony drains", unless otherwise permitted by the '''''Guarantor'''''.
<li>Reuse of any penetration flashing or ''drain'' (except serviceable cast iron ''drains'') is prohibited and may void the ''Guarantee'' (See Division A, [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Article 3.2.1.2.]]).
<li>When an existing cast iron ''drain'' is serviceable and reusable, all broken threaded rods, clamping rings, and drain strainers (“baskets”) must be replaced with new components suitable to the specific ''drain''.
<li>Where ''drains'' or ''overflows'' are fabricated from stainless steel, the stainless steel shall be Grade 316L and shall conform to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”.
<li>Sheet membranes used to flash (strip in) ''drains'' shall be reinforced with polyester or a composite scrim, but in any event must conform to the membrane requirements found in [[#9.2.1.1. Membrane Composition, Thickness, and Selection | Article 9.2.1.1.]]
</li></ol>

====11.2.1.2. Drains and Scuppers====
(See [[Notes to GLW Standard#A-11.2.1.2. | Note A-11.2.1.2.]])

<ol>
<li>All ''drains''
<ol>
<li>must be designed and manufactured for ''waterproofing system'' applications only, and shall not be floor drains, and
<li>shall be made so that the waterproofing membrane can be sealed to the drain body or bowl (the membrane seal must not rely solely on a clamping ring).
</li></ol>
<li>Cast iron ''primary drains''
<ol>
<li>must be supplied with a clamping ring, drain strainer, and ballast guard, and
<li>must be installed by the trade supplying the ''drain''.
</li></ol>
<li>When the deck is steel, cast iron ''drains'' should be supplied with an under-deck clamp that is secured separately from the clamping ring and strainer.

<li>Cast iron planter ''drains'' must be supplied with a perforated riser that is proprietary to the drain manufacturer (See the “RGC Standard for Vegetated Roofs”, [https://rpm.rcabc.org/index.php?title=VRA_Standard#6.1.3.2._Planter_Drainage Article 6.1.3.2]).
<li>Cast iron ''scupper drains'' must be
<ol>
<li>supplied with a clamping strainer, and
<li>designed with cast, enclosed (captive) strainer bolt receivers (drains with bolts exposed on the back side of the drain body are not acceptable).
</li></ol>
<li>Lead sheet flashing, when specified, must be sized to extend past the drain bowl by at least 152.4 mm (6”), and must have a weight of at least 15 kg/m2 (3 lb/ft2).
<li>All ''primary'' ''flanged insert drains'' (drains with a stem that inserts into a drain leader)
<ol>
<li>must be manufactured with a hot-welded or seamless flange at least 101.6 mm (4”) wide (measured from the outer edge of the drain opening),
<li>must be hot-welded at the joints between the bowl/flange and drain stem, and
<li>must be installed with a clamping ring.
</li></ol>
<li>''Primary flanged drains'' (insert drains or scuppers) that connect with plumbing inside the building (“internal” drains) must be constructed of
<ol>
<li>copper (min. weight: 24 oz. sheet copper; min. thickness: 20-gauge, or 0.889 mm (0.035”)),
<li>aluminum (min. thickness: 12-gauge, or 2.053 mm (0.08081”)), or
<li>stainless steel, Grade 316L (min. thickness: 18 gauge, or 1.27 mm (0.050”)).
</li></ol>
<li>''Primary flanged drains'' (insert drains or scuppers) that drain directly to the exterior of the building (“external” drains) must be constructed of
<ol>
<li>copper (min. weight: of 16 oz.; min. thickness: 24-gauge, or 0.559 mm (0.022”)), or
<li>aluminum (min. thickness: 20-gauge material, or 0.812 mm (0.03196”)).
</li></ol>
<li>All ''scupper drains'' (open, or closed (boxed)) must be
<ol>
<li>manufactured with welded seams and joints,
<li>designed to extend past the outside face of the wall, and
<li>fabricated from
<ol>
<li>copper (min. weight: 16 oz.; min. thickness: 24-gauge, or 0.559 mm (0.022”)), {{strike| or || 2025-May-29 }}
<li>aluminum (min. thickness: 20-gauge material, or 0.812 mm (0.03196”)), or
<li>stainless steel, Grade 316L (min. thickness: 18 gauge, or 1.27 mm (0.050”)).
</li></ol>
</li></ol>
<li>In addition to the general requirements for ''scupper drains'', closed (boxed) ''scupper drains'' must also be
<ol>
<li>fully enclosed on four sides, for through-wall applications,
<li>fabricated with a drip edge at the bottom outside edge of the ''drain'' to deflect overflow water away from the building, and
<li>fitted with an overflow opening on the outside face of the ''scupper'',
<ol>
<li>equal in capacity to the main ''drain leader'' opening, and
<li>at least 38.1 mm (1 ½”) lower than the top surface of the ''scupper drain''.
</li></ol>
</li></ol>
<li>''Overflow drains''
<ol>
<li>must be manufactured from copper or aluminum conforming to the material requirements in Sentence (9) above, but
<ol>
<li>may be manufactured from ferrous metals (See [[#Section 13.2. Materials |Section 13.2.]]), and
<li>may be manufactured from stainless steel, but the steel shall be Grade 316L stainless steel (min. thickness: 20 gauge, or 0.9525 mm (0.0375”)), and
</li></ol>
<li>must have a hot-welded or seamless flange at least 101.6 mm (4”) wide when measured from the outer edge of the drain opening.
</li></ol>
<li>All ''drains'' utilized in a ''roof assembly'' that includes gravel ballast or growing media (soil) must be supplied with the drain manufacturer's proprietary primary drain strainer and secondary stainless-steel ballast guard, but when one is not provided, a custom-fabricated guard may be used provided the guard
<ol>
<li>is fabricated from 20-gauge stainless-steel (0.9525 mm or 0.0375”),
<li>incorporates 6.35 mm (1/4”) perforations, and
<li>equals or exceeds the height of the ''finished system surface''.
</li></ol>
</li></ol>

====11.2.1.3. Reserved====

====11.2.1.4. Fasteners====

<ol>
<li>Mechanical fasteners used to secure ''scuppers'' and ''overflows'' must be
<ol>
<li>properly sized in accordance with ''waterproofing system'' securement requirements (See [[#Part 3 - Securing the Roof Assembly | Part 3]]), and shall be
<ol>
<li>self-drilling purpose-made screws manufactured with deep, recessed heads.
</li></ol>
</li></ol>
</li></ol>

====11.2.1.5. Sealants====

<ol>
<li>Sealants must be manufactured by, or acceptable to, the ''manufacturer''.
<li>Compression sealants must be formulated to provide waterproofed seals under compressive loads.
</li></ol>

====11.2.1.6. Liquid Membrane Flashing====

<ol>
<li>Only a RoofStar-accepted reinforced two-component catalyzed polymethyl methacrylate (PMMA) liquid membrane flashing system may be used on the water plane to flash ''drains'', ''scuppers'', and ''overflows''.
</ol></li>

==Section 11.3. Application==
===11.3.1. Guarantee Term Requirements===
====11.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====11.3.1.2. Reserved====

===11.3.2. All Systems===
====11.3.2.1. Condition and Suitability of Drains====

<ol>
<li>All clamping rings and strainers must be unbroken, properly seated, and fully secured.
</li></ol>

====11.3.2.2. Location and Spacing of Drains====
(See also [[#Section 11.1. Design | Section 11.1., "Design"]])

<ol>
<li>''Drains'' for new construction ''projects'' must be located at least 457.2 mm (18") away from any adjacent ''drain'', penetration, upstand, edge, or ''wall'' (the separation space is measured between openings, excluding the flange).
<li>The 457.2 mm (18") spacing requirement for ''drains'' does not apply to ''overflows'', ''scupper drains'', and drains used in membrane gutters.
<li>''Drains'' and cap membrane seams must be offset from each other at least 304.8 mm (12”), measured from the edge of the ''drain''.
</li></ol>

====11.3.2.3. Drain Protection Against Blockage====

<ol>
<li>All ''drains'' must be supplied and installed with a secured strainer to prevent debris from blocking the ''drain''.
<li>When a ''waterproofing assembly'' supports ''overburden'' or is secured with ballast, drains must be installed together with a surrounding ballast guard that promotes water flow.
<li>When the ''overburden'' is landscaping, ''drains'' must be protected by both a stone/ballast guard and a ''separation zone'', as required in [https://rpm.rcabc.org/index.php?title=VRA_Standard#5.1.3.3._Separation_of_vegetation_from_roofing_details {{hilite |Article 5.1.3.3.] of the "RGC Standard for Vegetated Roofs".
</ol></li>

====11.3.2.4. General Installation Requirements====

<ol>
<li>''Drains'' must be
<ol>
<li>secured to the ''supporting deck'' structure, or to blocking, and
<li>properly detailed for ''continuity'' with specified ''control layers''.
</ol></li>
<li>''Drains'' must be flashed using the primary membrane system or accessories acceptable to the ''manufacturer'' and the '''''Guarantor'''''.
<li>When fleece-reinforced liquid membrane systems are used to flash drains, only a RoofStar-accepted reinforced two-component catalyzed polymethyl methacrylate (PMMA) may be used on the ''drainage plane'' to flash ''drains'', ''scuppers'', and ''overflows''.
</ol></li>

===11.3.3. Drains===
(The requirements for [[#11.3.2. All Systems | Subsection 11.3.2., "All Systems"]], shall be read together with the following Articles)

====11.3.3.1. Reserved====

====11.3.3.2. General Requirements for Cast Iron Drains====

<ol>
<li>Cast iron ''drains'' must be installed by the plumbing/mechanical trade.
<li>When cast iron ''drains'' are used and the ''deck'' is steel, a sump receiver and under-deck clamp must be provided and installed by the trade supplying the drain.
<li>Drain extensions for cast iron roof drains should be avoided.
<li>Existing flow controls removed during ''project'' construction should be reinstalled; however, if the replacement ''waterproofing assembly'' will support landscaping, the drainage design must conform to the requirements set out by the '' Design Authority''.
<li>''Drains'' shall be connected to internal piping by mechanical compression type seals only; the use of "O"-rings, mastics and caulking, is not acceptable for sealing to internal piping.
<li>All cast iron ''drains'' must be
<ol>
<li>new or clean,
<li>unbroken (this also applies to clamping rings, threaded rod, strainers, and ballast guards), and
<li>flashed in accordance with the ''manufacturer's'' published instructions, or to the requirements published in this Part, whichever are greater.
</li></ol>
<li>The ''continuity'' of air and vapour ''control layers'' must be maintained, where the controls are specified.
</li></ol>

====11.3.3.3. Cast Iron Drains Installed with Lead Flashing====

<ol>
<li>All cast iron ''drains'' installed with lead flashing shall conform to the means and methods described and required in [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#11.3.3.3._Cast-iron_Drains_Installed_with_Lead_Flashing Article 11.3.3.3.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs" (lead flashing is not used with cast-iron drains installed in hot fluid-applied rubberized asphalt membranes).
</li></ol>

====11.3.3.4. Cast Iron Drains Installed with Membrane Flashing====

<ol>
<li>All cast-iron drains installed with membrane flashing shall conform to the means and methods described and required in the applicable RGC Standard for roofs:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#11.3.3.4._Cast-iron_Drains_Installed_with_Membrane_Flashing Article 11.3.3.4.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#11.3.3.4._Cast-iron_Drains_Installed_with_Membrane_Flashing Article 11.3.3.4.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>When the waterproofing membrane is SBS,
<li>the clamping ring must be set in and bolted down to a warm, newly applied membrane, to ensure a good seal, or
<li>the sheet membrane may be sealed to the drain bowl with the application of a 2-component fleece-reinforced PMMA liquid flashing system that overlaps the sheet membrane at least 200 mm (8”) onto the drain flange and into the exposed drain bowl by no less than 50.8 mm (2”).
</li></ol>
</li></ol>

====11.3.3.5. Cast-iron Roof Drain Retrofitting (Replacement Roofing)====

<ol>
<li>Retrofitting a cast iron ''drain'' is not recommended, but when retrofitting is unavoidable (i.e., the ''drain'' has deteriorated to the extent that it cannot receive a new waterproofing membrane, and removal is not possible),
<ol>
<li>remove any broken parts and debris,
<li>clean and prepare all surfaces of the ''drain'' that will receive new waterproofing materials,
<li>seal any cracks in the bowl with a 2-component fleece-reinforced PMMA liquid flashing system, applied to the inside of the drain bowl, ensuring that the flashing system extends at least 50.8 mm (2”) on either side of the crack,
<li>connect the retrofit insert to internal leaders using only an external coupling (unless impractical - see alternative requirements below), and
<li>follow the requirements set out in [[#11.3.3.2. General Requirements for Cast Iron Roof Drains | Article 11.3.3.2.]]
</li></ol>
<li>When an internal compression seal is used out of necessity to connect a retrofit ''drain'' to an existing ''drain leader'',
<ol>
<li>the joint must be properly prepared to ensure the joined surfaces are clean, smooth, and uniform, and
<li>honing out the cast pipe may be required.
</li></ol>
<li>In the absence of a clamping collar, the retrofit insert ''drain'' must be sealed to the primary membrane with another method acceptable to the ''manufacturer'' and the '''''Guarantor''''' (Ref. [[#11.2.1.6. Liquid Membrane Flashing | Article 11.2.1.6.]]).
</li></ol>
</li></ol>

====11.3.3.6. Flanged Insert-type Roof Drains====

<ol>
<li>Flanged insert drains installed with SBS-modified bituminous sheet membranes must conform to the requirements in [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#11.3.3.6._Flanged_Insert-type_Roof_Drains Article 11.3.3.6.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
</li></ol>

====11.3.3.7. Scuppers and Overflows====

<ol>
<li>When ''scuppers'' and ''overflows'' are used, their installation shall conform to the means and methods described and required in the applicable RGC Standard for roofs:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#11.3.3.7._Scuppers_and_Overflows Article 11.3.3.7.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#11.3.3.7._Scuppers_and_Overflows Article 11.3.3.7.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
</li></ol>

====11.3.3.8. Reserved====

<hr>
<div id=PART_12></div>

=Part 12 - Penetrations and Curbs=
==Section 12.1. Design==
===12.1.1. General===
====12.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====12.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===12.1.2. Guarantee Term Requirements===
====12.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====12.1.2.2. Reserved====

===12.1.3. All Systems===
====12.1.3.1. General Requirements for Penetrations====

<ol>
<li>The use of curbs conforming to [[#12.1.3.4. Curbs, Sleepers, and Equipment Pads | Article 12.1.3.4.]] is required for mounting for all venting units and equipment.
<li>Where openings or penetrations pass through the ''waterproofing assembly'' (i.e., for mechanical or electrical services), the specification and detail drawings shall
<ol>
<li>provide direction for ''continuity'' of ''control layers'', where these layers intersect with any opening or penetration, and
<li>require a ''curb'' or an acceptable penetration flashing to enclose and seal each opening in the assembly.
</li></ol>
<li>Each penetration (except for clustered or bundled electrical cables) must be flashed separately from others.
<li>Single or bundled electrical cable penetrations must be flashed with a suitable goose-neck flashing, fitted with a weather head.
<li>Penetration flashings must be
<ol>
<li>new,
<li>suitable for the type of penetration,
<li>sized to elevate the open end of the flashing or weather-head at least 203.2 mm (8”) above the ''finished system surface'', and
<li>properly sized and fitted around the penetration to permit a seal (gaps between the penetration and the inside of the flashing shall be no more than 12.7 mm (1/2"), or
<li>of sufficient height to be made water-tight with a site-fabricated membrane seal fashioned to enclose the gap between the flashing and the penetration (see '''Figure 12.3.2.1.-A'''); the application of liquid sealant around the penetration in an open-top flashing is not acceptable.
</li></ol>
<li>Notwithstanding the minimum height requirement for flashings in Sentence (5), when services penetrate the ''waterproofing assembly'' and must be concealed below the ''finished system surface'', the flashing for the penetration shall be no less than 101.6 mm (4”) in height and the penetration shall be sealed to the flashing, but a leak through the penetration or its seal with the flashing is not covered by a '''''RoofStar Guarantee'''''.
<li>Hollow steel penetrations and structures that penetrate the ''waterproofing system'' above a conditioned space should be filled with spray foam and topped with pourable sealant.
<li>Hollow steel penetrations and structures that are manufactured with vent holes (necessary during galvanizing) must be fitted with lead plugs in the holes to prevent water ingress (plugs should be cut flush with the outside face of the penetration).
<li>Penetration flashings
<ol>
<li>that are or may be prone to condensation should be factory-insulated, and
<li>should be selected for their ability to inhibit the intrusion of vermin and insects into the roof assembly and building interior.
</li></ol>
<li>Suitable flashings must be specified for penetrations that are expected to expand, contract, or otherwise move.
<li>Cylindrical ("pipe-type") penetrations must be sealed with
<ol>
<li>the ''manufacturer’s'' proprietary pre-molded flashing that utilize mechanical clamps,
<li>a 2-part site-fabricated or proprietary flashing with a removable inspection/access cap (Ref. Construction Detail [[SBS 2-Part Retrofit Flashing (Cable Penetration) | "2-Part Retrofit Flashing (Cable Penetration)"]]), or
<li>roof ''curbs'' fitted with customized metal hoods or square-to-round metal flashing.
</li></ol>
<li>Aluminum or copper flashings for penetrations may be located at the ''drainage plane'' in any assembly type.
</li></ol>

====12.1.3.2. Galvanized Penetration Flashings====

<ol>
<li>The use of galvanized flashings and vents is not recommended, but when they are specified, they shall be elevated on ''curbs'' no less than 203.2 mm (8") in height above the ''finished system surface''.
</li></ol>

====12.1.3.3. Separation Between Details====

<ol>
<li>Penetrations on new construction ''projects'' must be separated from other penetrations, drains, curbs, walls, or changes in plane so that the space between flashings for these details is at least 304.8 mm (12") (this is measured between openings or the edge of a detail and excludes the flashing flange); the exception to this requirement is customized penetration flashings designed for multiple individual or clustered penetrations.
<li>When the separation between details does not comply with the spacing requirements in this Part, only the alternate application methods described in [[#12.3.2.1. General Requirements for Flashing Penetrations | Article 12.3.2.1.]] of the related waterproofing roof Standard will be permitted by the '''''Guarantor''''':
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#12.3.2.1._General_Requirements_for_Flashing_Penetrations Article 12.3.2.1.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#12.3.2.1._General_Requirements_for_Flashing_Penetrations Article 12.3.2.1.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
<li>Where alternate methods are not available in this Standard, or where the space between penetration flashings and any change in plane (e.g., ''curb'', sleeper, ''parapet'') is less 203.2 mm (8”), a Variance request shall be submitted to the '''''Guarantor''''' by the ''Design Authority'' following the Variance requirements in [[#1.1.3.6. Variances | Article 1.1.3.6.]]
</li></ol>
</li></ol>

====12.1.3.4. Curbs, Sleepers, and Equipment Pads====

<ol>
<li>The design and placement of ''curbs'' and sleepers shall be the responsibility of the ''Design Authority''.
<li>''Curbs'' must be designed so that they can be secured directly to the ''deck'' structure, or to intermediate blocking, and must not be situated on top of the ''waterproofing system''.
<li>All ''curbs'', sleepers, and deck-supported equipment pads must be designed to achieve a minimum height of 203.2 mm (8”), measured from the ''finished system surface'', to permit proper membrane flashing.
<li>Notwithstanding the minimum height requirement membrane flashing, ''curbs'' and sleepers that are completely sealed (enveloped) with membrane, and are free of penetrations through the top face (i.e., equipment isolators) may be less than 203.2 mm (8”) in height, measured from the ''finished system surface'', but shall be
<ol>
<li>no less than 101.6 mm (4") in height, or
<li>no less than 127 mm (5") in height when capped with a ''linear metal flashing''.
</li></ol>
<li>Equipment isolators are not considered part of the ''waterproofing system'' and therefore any leaks caused by or occurring at isolators shall be excluded from coverage under the '''''RoofStar Guarantee'''''.
<li>Equipment ("housekeeping") pads placed on top of the ''finished system surface'' and supporting combined loads
<ol>
<li>less than 90 kg (200 lbs) must be separated from the membrane with a bond-breaking layer (i.e., XPS insulation), and
<li>greater than 90 kg (200 lbs) must conform to the requirements for structural sleepers or equipment pads.
</ol></li>
<li>Reinforced liquid membrane flashing systems may be specified only where
<ol>
<li>sheet membrane applications are not practicable (i.e., complex geometry), or
<li>the top edge of membrane plies must be terminated on a vertical surface and other means of termination are not practicable or even possible.
</li></ol>
<li>''Curbs'' enclosed within or adjacent to landscaping shall be designed with base metal flashings to retain the root barrier and any other system components that must be turned up the vertical surface; base flashings shall be fabricated and installed in keeping with the requirements in [[#Part 13 - Linear Metal Flashing | Part 13]] (See [[#13.1.3.6. Cap Flashing, Counter-flashing, and Reglet Flashing | Articles 13.1.3.6.]], [[#13.2.2.1. Fabrication of Flashing | 13.2.2.1.]], and [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | 13.3.2.3.]]; also see Clause (1)(8) of Article 10.3.2.5., “Installation of Root Barrier”, in the [https://rpm.rcabc.org/index.php?title=VRA_Standard#10.3.2.5._Installation_of_Root_Barrier "RGC Standard for Vegetated Roofs"]).
</li></ol>

====12.1.3.5. Protection of Waterproofing Membranes====

<ol>
<li>The ''Design Authority'' must consider and specify mitigating strategies to preserve the waterproofing membrane from damage (i.e., specifying grease guards or a reinforced 2-part liquid membrane coating) when mechanical equipment extracts and discharges grease, chemicals, or other contaminants, onto the roof.
</li></ol>

====12.1.3.6. Railings, Ladders, and Other Attached Structures====

<ol>
<li>Railings, ladders, and other attached structures shall not be affixed at the field membrane level and must be designed for attachment to vertical surfaces only so that fasteners are elevated above the ''finished system surface'' at least 88.9 mm (3-1/2”).
<li>Ladders, railings, or other structures that may penetrate the ''waterproofing system'', should be designed to minimize thermal bridging (and consequential condensation) or reduced thermal performance; uninsulated direct, rigid connections to the structural ''deck'' or ''walls'' is strongly discouraged.
</li></ol>

==Section 12.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===12.2.1. Material Properties===
====12.2.1.1. Membranes Used for Flashing====

<ol>
<li>Sheet membranes used to flash (strip in) penetrations and ''curbs'' shall be
<ol>
<li>the same membrane used on the system field, or
<li>sheet or liquid membranes conforming to [[#10.2.1.1. Flashing Membranes | Article 10.2.1.1.]]
</li></ol>
</li></ol>

====12.2.1.2. General Requirements for Penetration Flashings====

<ol>
<li>All penetration flashings, except flashings that are proprietary to the ''manufacturer'' {{hilite | and flashings that are installed or supplied by others as part of a Code-compliant, certified chimney assembly (i.e., for solid fuel heating appliances) || 2023-October-28 }}, must be
<ol>
<li>sized to elevate the open end of the flashing or weather-head at least 203.2 mm (8”) above the ''finished system surface'',
<li>accepted by or acceptable to the '''''Guarantor''''',
<li>manufactured to conform to CSA-B272, "Prefabricated Self-Sealing Roof Vent Flashings" (a penetration flashing fabricated by the ''Contractor'' is exempt from this requirement),
<li>permanently marked with the standard number it conforms to, which shall be independently validated through published testing by a qualified third-party,
<li>manufactured from sheet metal conforming to the material requirements in [[#Section 13.2. Materials | Section 13.2.]], when the flashing is custom-made or fabricated by the ''Contractor'',
<li>compatible with the ''waterproofing system'',
<li>seamless or, in the alternative, fabricated with fully hot-welded joints, including a base flange at least 101.6 mm (4”) wide,
<li>capable of inhibiting the intrusion of vermin and insects into the ''roof assembly'' and building interior, and
<li>at least 203.2 mm (8”) tall when measured from the ''finished system surface'' to an opening, or to the top of the flashing.
</li></ol>
<li>Metal penetration flashings that are purpose-made for
<ol>
<li>electrical cables must be goose-necked and supplied with a downward-facing weather head that incorporates proprietary rubber-based friction seals, and
<li>plumbing vents shall be supplied with a matching settlement cap produced by the same manufacturer.
</li></ol>
<li>Galvanized penetration flashings, and galvanized vents, must
<ol>
<li>meet or exceed the CSA-A93 Standard,
<li>be made with material galvanized steel (26-gauge or heavier) conforming to the metal requirements found in [[#Part 13 - Linear Metal Flashing | Part 13, "Linear Metal Flashing"]], and
<li>be at least 203.2 mm (8”) tall when measured from the ''finished system surface'' to an opening.
</li></ol>
<li>In addition to the requirements in Sentence (1), stainless-steel penetration flashings specified for corrosive environments should be made of Grade 304 stainless steel conforming to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”, but when the penetration flashings may be subjected to regular or constant exposure to or immersion in water (especially in a coastal environment), or to corrosive environments, the stainless steel shall be Grade 316L (conforming to the same ASTM standard) (See [[Notes to GLW Standard#A-13.2.1.2.(3)(2)| Note A-13.2.1.2.(3)(2)]]).
<li>Storm collars
<ol>
<li>must be fashioned from galvanized or stainless steel,
<li>must slope downward from the penetration approximately 45°,
<li>shall be at least 50.8 mm (2”) wide,
<li>shall be self-locking or, in the alternative, manufactured to receive a mechanical band clamp, and
<li>should be fabricated with a channel at the top edge, for retaining sealant.
</li></ol>
<li>EPDM used to form a seal between a penetration and its flashing (Ref. [[#12.3.2.1. General Requirements for Flashing Penetrations | Article 12.3.2.1.(12)]]) shall be semi-cured and possess a nominal thickness of no less than 60 mils.
<li>Unshielded flexible mechanical couplings used to join a flashing and a pipe penetration shall be
<ol>
<li>certified to meet ASTM C564 or ASTM D5926,
<li>certified to meet ASTM C1173 and CSA-B602,
<li>supplied with top and bottom proprietary screw-type stainless steel mechanical clamps,
<li>leak-proof, resistant to chemicals, UV-stable, and
<li>suitable for the penetration and flashing they join together.
</li></ol>
</li></ol>

====12.2.1.3. Flashings for Heating and Plumbing System Penetrations====

<ol>
<li>All plumbing vent flashings shall be non-ferrous.
<li>Lead plumbing vent flashings are not permitted.
<li>In addition to the general requirements in [[#12.2.1.2. General Requirements for Penetration Flashings | Article 12.2.1.2.]], all metal penetration flashings (except natural airflow vents) used for heating and plumbing penetrations must be
<ol>
<li>properly sized for the penetration, both in diameter and height, and
<li>supplied with a properly sized galvanized storm collar or settlement cap.
</li></ol>
</li></ol>

====12.2.1.4. Liquid Membrane Flashing====

<ol>
<li>Polymethyl methacrylate (PMMA) and polyurethane methyl methacrylate (PUMA) liquid membrane flashing systems must be
<ol>
<li> catalyzed 2-component systems,
<li>fleece-reinforced with the manufacturer's proprietary polyester fleece, and
<li>accepted listed in [[Division C | Division C]] of this ''Manual''.
</li></ol>
<li>Single-component polyurethane and silicon-based liquid membrane flashing system must be listed in [[Division C | Division C]].
<li>Accessory PMMA detailing products
<ol>
<li>must be listed in [[Division C | Division C]], and
<li>must be reinforced with chopped or loose reinforcement fibres supplied by the ''manufacturer''.
</li></ol>
</li></ol>

==Section 12.3. Application==
===12.3.1. Guarantee Term Requirements===
====12.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====12.3.1.2. Reserved====

===12.3.2. All Systems===
====12.3.2.1. General Requirements for Flashing Penetrations====

<ol>
<li>All penetration flashing materials must be new.
<li>Anything that penetrates through the ''waterproofing assembly'', including openings in ''walls'' and for ventilation, must be
<ol>
<li>sealed to each ''control layer'' that it passes through or intersects, and
<li>flashed with
<ol>
<li>a flashing proprietary to and supplied by the membrane ''manufacturer'',
<li>a ''curb'',
<li>a purpose-made flashing, or
<li>a custom-fitted flashing{{strike| , all of which shall be sealed to the ''roof system'' so that the penetration or opening is protected from water ingress, to at least 203.2 mm (8") above the ''finished system surface''|| 2025-October-22 }}.
</li></ol>
</li></ol>
<li>Except for flashings that are proprietary to and supplied by the membrane ''manufacturer'', all flashings for penetrations in the system field shall be sealed to the ''waterproofing system'' so that the penetration or opening is protected from water ingress, to at least 203.2 mm (8") above the ''finished system surface''.
<li>Each penetration must have its own flashing (except where a purpose-made flashing is designed for multiple penetrations), and each flashing
<ol>
<li>must be suitable for the slope and penetration,
<li>shall be fitted with a cap, hood, weather-head, or closure fitting,
<li>shall not be left open to the weather, insects, or vermin, and
<li>must be properly sized and fitted around the penetration to permit a seal.
</li></ol>
<li>Except for storm collars, or where sealant pockets are permitted ([[#12.3.2.8. Sealant Pockets |Article 12.3.2.8.]]), the use of sealants to make a penetration watertight where it exits a flashing is not acceptable.
<li>Pipe penetrations in the roof field (e.g., plumbing vents)
<ol>
<li>must be at least 203.2 mm (8”) high, when measured from the ''finished system surface'',
<li>must be flashed with a spun flanged flashing at least 203.2 mm (8”) high, when measured from the ''finished system surface'',
<li>shall match the height of the flashing opening (pipes that are too short must be extended in a watertight manner), and
<li>shall be enclosed at the opening with a cap, supplied by the flashing manufacturer, that fits inside the pipe penetration and snugly fits around the outside of the flashing tube (caps should not be mechanically fastened to the flashing).
</li></ol>
<li>Hollow steel penetrations and structures with vent holes from the galvanizing process (e.g., ladders that are anchored to the ''project'' ''deck'' and penetrate the ''waterproofing system'') must be plugged with lead to prevent leaks.
<li>Non-ferrous penetration flashings and vents that conform to the material requirements in [[#Section 12.2. Materials | Section 12.2.]] may be located at the ''drainage plane'' in any assembly type.
<li>Lead penetration flashings are not permitted.
<li>All penetration flashings must be clean, dry, absolutely free of contaminants, have an exterior finish that is suitable to receive sheet or liquid membrane flashing, and must be prepared in keeping with any surface preparation requirements published by the membrane ''manufacturer''.
<li>Cable and horizontal pipe penetrations must be flashed with
<ol>
<li>a purpose-made flashing (i.e., a goose-neck flashing fitted with a weather head),
<li>a sheet membrane-flashed curb fitted with a customized sheet metal hood (shaped to function like a weather head), or
<li>a 2-component fleece-reinforced liquid membrane flashing as described in [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6.]] (when other methods are not possible or practicable).
</ol></li>
<li>Cables and piping (tubing) passing through a penetration flashing should be drooped (when possible), or fitted with a capillary-breaking collar and sealed at any openings, to prevent water from tracking along the cable or pipe, or to prevent wind-driven rain from entering the flashing, into the building; water that enters a building in this way bypasses the ''waterproofing system'' and does not constitute a leak and is therefore excluded from coverage under the '''''RoofStar Guarantee''''' (See '''Figure 12.3.2.1.A''' and '''12.3.2.1.-B''').
 
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 12.3.2.1.-A Flexible penetration showing drip loop and sealant''' Forming Part of Sentence 12.3.2.1.(13) (Click to expand illustration)
|-
| [[File:Part 12 - Illustration - Figure 12.3.2.1.-A.png|link=https://rpm.rcabc.org/images/6/6d/Part_12_-_Illustration_-_Figure_12.3.2.1.-A.png | 600 px]]
|}
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 12.3.2.1.-B Piping (tubing) penetrations through curb and metal hood flashing''' Forming Part of Sentence 12.3.2.1.(13) (Click to expand illustration)
|-
| [[File:Part 12 - Illustration - Figure 12.3.2.1.-B.png|link=https://rpm.rcabc.org/images/a/af/Part_12_-_Illustration_-_Figure_12.3.2.1.-B.png | 600 px]]
|}

<li>Penetration flashings must be sealed into the ''waterproofing system'' following the means and methods described and required in the applicable RGC Standard for roofs:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#12.3.2.1._General_Requirements_for_Flashing_Penetrations Article 12.3.2.1.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#12.3.2.1._General_Requirements_for_Flashing_Penetrations Article 12.3.2.1.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</ol></li>
</ol></li>

====12.3.2.2. Galvanized Penetration Flashings====

<ol>
<li>Galvanized, hot-welded flashings and vents may be installed on ''uninsulated systems'' or in a ''protected waterproofing system'', provided they are installed on ''curbs'' no less than 203.2 mm (8") in height above the ''finished system surface'' (Ref. [[#11.1.3.2. Roof Drain Function and Location | Article 12.1.3.2.]]) and are sealed to the ''curbs'' with sheet membrane.
</ol></li>

====12.3.2.3. Separation Between Penetration Flashings====

<ol>
<li>Penetrations on new construction ''projects'' must be separated from
<ol>
<li>other penetrations, ''curbs'', ''walls'', or changes in plane so that the space between flashings for these details is at least 304.8 mm (12") (this is measured between openings or the edge of a detail and excludes the flashing flange), and
<li>''roof drains'' at least 457.20 (18") (Also see [[#11.1.3.2. Roof Drain Function and Location | Article 11.1.3.2.]]).
</li></ol>
<li>When the separation between penetration flashings does not conform to the minimum spacing requirements, the application options described in [[#12.3.2.1. General Requirements for Flashing Penetrations | Article 12.3.2.1.]] of the applicable RGC Standard for roofs must be followed.
</li></ol>

====12.3.2.4. Curbs, Sleepers, and Equipment Pads====

<ol>
<li>Curbs shall be waterproofed following the means and methods described and required in the applicable RGC Standard for roofs:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#12.3.2.4._Curbs.2C_Sleepers.2C_and_Equipment_Pads Article 12.3.2.4.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#12.3.2.4._Curbs.2C_Sleepers.2C_and_Equipment_Pads Article 12.3.2.4.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</ol></li>
</ol></li>

====12.3.2.5. Alternative Approaches to Membrane Flashing====

<ol>
<li>The ''Contractor'' must assess the best approach to waterproofing any detail, when site conditions or construction sequencing require alternatives to heat-welding.
<li>When alternative methods are required,
<ol>
<li>curbs must be flashed by adapting the methods described in [[SBS_Roof_Systems_Standard#10.3.8.2. Pre-flashing | Article 10.3.8.2.]] of the "Standard for SBS-modified Bitumen Membrane Roof Systems", or by using other approaches that are equal or superior, and
<li>penetrations must be
<ol>
<li>incorporated into an adhered or self-adhered field membrane system, or
<li>flashed by using a pre-flashing method that is suitable for the penetration.
</li></ol>
</li></ol>
</li></ol>

====12.3.2.6. Liquid Membrane Flashing====
(See '''Figures 12.3.2.6.-A''' and '''12.3.2.6.-B''')

<ol>
<li>Any liquid flashing system shall
<ol>
<li>conform to the material requirements in [[#12.2.1.4. Liquid Membrane Flashing | Article 12.2.1.4.]],
<li>be compatible with the substrate to which it is applied,
<li>be applied to a properly prepared substrate, which must be clean, dry, free of contaminants, and primed, as required by the manufacturer in their published instructions,
<li>be applied within masked boundaries to produce clean, straight, plumb edges (accessory products may be exempt from this requirement only when masking is impracticable),
<li>be used only when permitted by the ''manufacturer'', and
<li>be applied in keeping with the requirements and limitations of this Article.
</ol></li>
<li>Liquid membrane flashing systems may not be used on plastic substrates.
<li>When liquid membrane flashing systems are required or specified, only two--component fleece-reinforced catalyzed polymethyl methacrylate (PMMA) and polyurethane methyl methacrylate (PUMA) liquid membrane flashing systems may be used
<ol>
<li>on the ''drainage plane'',
<li>where sheet membrane flashing may not be practical or even possible,
<li>to terminate the top edge of sheet membrane flashing,
<li>where resistance to contamination of sheet membrane is necessary,
<li>where abrasion resistance is required, or
<li>for sheet membrane reinforcement (i.e., at corners).
</ol></li>
<li>Two-component fleece-reinforced catalyzed polymethyl methacrylate (PMMA) and polyurethane methyl methacrylate (PUMA) liquid membrane flashing systems
<ol>
<li>may be used
<ol>
<li>where abrasion resistance is desirable, or
<li>where the ''Design Authority'' specifies its application.
</ol></li>
<li>shall be applied to ensure that
<ol>
<li>the rate of application conforms to the ''manufacturer's'' published instructions, unless superseded by this Standard,
<li>the base coating of catalyzed liquid membrane resin evenly and fully covers the masked area,
<li>the manufacturer’s reinforcement fleece is cut to cover the masked area, to within 4.76 mm (1/8”) of all edges,
<li>the fleece is fully embedded in, and saturated with, the based coating of resin, and
<li>the fleece is evenly and thoroughly coated with a second application of catalyzed liquid membrane resin, covering the masked area.
</ol></li>
</ol></li>
<li>Where a fleece-reinforced 2-component catalyzed polymethyl methacrylate (PMMA) liquid membrane flashing system is used to terminate sheet membrane on the vertical plane, the liquid membrane flashing system must overlap the sheet membrane, and it must extend onto the vertical substrate above the sheet membrane, by no less than 50.8 mm (2") ('''Figure 12.3.2.-B''').
<li>Fleece-reinforced 2-component catalyzed polymethyl methacrylate (PMMA) liquid membrane flashing system that is used as a substitute for sheet membrane flashing must be carried up a vertical plane above the ''finished system surface'' at least 203.2 mm (8”), and no less than 203.2 mm (8") onto the horizontal field plane (See '''Figure 12.3.2.6.-A'''| and '''Figure 12.3.2.6.-B''').
<li>Single-component polyurethane and silicon-based liquid membrane flashing ''system''
<ol>
<li>may be used
<ol>
<li>to coat galvanized flashings used in the water plane, provided the application follows the requirements in [[#12.3.2.2. Galvanized Penetration Flashings | Article 12.3.2.2., "Galvanized Penetration Flashings"]],
<li>to flash details more than 101.6 mm (4”) above the water plane, that cannot be sealed with sheet-type membranes, or
<li>to seal pre-curb dowels (see [[#14.3.2.7. Structures and Equipment | Article 14.3.2.7.]]).
</ol></li>
<li> must not be used in the ''drainage plane'', or to reinforce membranes against abrasion,
<li>must be applied in two cured coats, unless otherwise permitted in this Standard, and
<li>must be fleece-reinforced between coats where
<ol>
<li>the application is considered permanent,
<li>a change in plane (angle) occurs, or
<li>there is a joint between two supports and the liquid membrane must serve as a bridge.
</ol></li>
</ol></li>
<li>Accessory PMMA detailing products
<ol>
<li>shall not be used as a substitute for fleece-reinforced 2-component PMMA systems, where these are required or exclusively permitted,
<li>must be used at locations 101.6 mm (4”) or more above the ''finished system surface'', except where complex details, such as bolt heads, cannot be properly sealed with a fleece-reinforced 2-component PMMA system, and
<li> must not be used where movement is expected.
</ol></li>
</ol></li>
 
::{|
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 12.3.2.6.-A Application Requirements for PMMA on Roof Penetration''' Forming Part of Sentence 12.3.2.6.(4) (Click to expand illustration)
|-
| [[File:Figure 12.3.-B (Generic).jpg |link=https://rpm.rcabc.org/images/7/75/Figure_12.3.-B_%28Generic%29.jpg | 500 px]]
|}
 
::{|
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 12.3.2.6.-B Illustration of Various Liquid Membrane Flashing Applications''' {{hilite | Forming Part of Article 12.3.2.6. (Click to expand illustration)
|-
| [[File:Part 12 - Figure 12.3.2.6.-B.png|link=https://rpm.rcabc.org/images/9/92/Part_12_-_Figure_12.3.2.6.-B.png | 800 px]]
|}

====12.3.2.7. Railings, Ladders, and Other Attached Structures====
(See also Construction Detail [[SBS Railing | "Railing"]])

<ol>
<li>Fasteners installed to secure railings, ladders, and other structures to the vertical face of ''walls'' must be located at least 88.9 mm (3-1/2") above the ''finished system surface''.
<li>Railings, ladders, and other structures mounted on a waterproofed horizontal substrate that is part of the ''waterproofing assembly'' (i.e., on top of a ''parapet'') shall be fully flashed around each base with a fleece-reinforced liquid membrane flashing material, unless directed otherwise by a written Variance issued by the '''''Guarantor''''', using a product that is
<ol>
<li>suitable for use in the ''drainage plane'',
<li>applied in keeping with the requirements in [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6.]], and
<li>compatible with roofing membranes installed on the substrate.
</li></ol>
<li>Railings, ladders, and other structures shall not direct water into the building by means of weep holes or the method of fastening.
</li></ol>

<hr>
<div id=PART_13></div>

=Part 13 - Linear Metal Flashing=
==Section 13.1. Design==
===13.1.1. General===
====13.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====13.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Cleat'', also referred to as a "wind clip", is a long piece of sheet metal that is fastened to a solid substrate (usually structural) behind a ''linear metal flashing'', to hold it in place.
<li>''Drip edge'' means the bent (kicked-out) hemmed edge of a linear metal flashing, measuring at least 19.05 mm (3/4") and angled no more than 30° from vertical ("Architectural Sheet Metal Manual" published by the Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA), Sixth Ed.: p. 2.3); it is used to direct dripping water away from the face of the metal flashing or the materials it is protecting, such as a wall. A drip edge may be fabricated on any linear metal flashing but is commonly used on coping (parapet cap) and counterflashing (also see the Glossary for a colloquial use of the term).
<li>''Hemmed edge'' means an edge of a ''linear metal flashing'' that is folded onto itself (bent 180°), to render a smooth (not raw or sharp) finish (this is sometimes referred to as a "safety edge").
<li>''Linear metal flashing'' means flashings cut and shaped from flat metal stock, to redirect water at ''waterproofing system'' perimeters and edges, or to control the flow of water in valleys and drainage spillways. ''Linear metal flashings'' also protect waterproofing membranes from weathering and damage and provide an aesthetic finish to the ''waterproofing system''.
</li></ol>
</li></ol>

===13.1.2. Guarantee Term Requirements===
====13.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====13.1.2.2. Reserved====

===13.1.3. All Systems===
====13.1.3.1. Scope and Function====
(See also the "Architectural Sheet Metal Manual" published by the Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA))

<ol>
<li>''Linear metal flashings'' described in this Part and referenced elsewhere in this Standard
<ol>
<li>are considered necessary and integral to the scope of a ''project'' designed and constructed to qualify for a '''''RoofStar Guarantee''''',
<li>do not perform a waterproofing function and therefore must be specified for use over membrane flashing, or designed to shed water onto a waterproofing or water-shedding primary material,
<li>shall be new (reuse of any existing ''linear metal flashings'' is prohibited and may void the '''''Guarantee''''' (See [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2., "Limitations and Exclusions of Guarantee"]]), and
<li>shall be ''Contractor''-fabricated to suit the ''project'' requirements or shall be listed in [[Division_C | Division C]] as materials pre-engineered and manufactured by a metal supplier.
</li></ol>
<li>The requirements in this Part apply almost entirely to ''Contractor''-fabricated linear metal flashings; consequently, RoofStar-accepted pre-engineered products accepted as systems are exempt from the requirements in this Part for metal gauge, profile, and securement, unless expressly stated otherwise.
<li>''Linear metal flashings''
<ol>
<li>must be specified when UV-sensitive membranes require protection, or when membrane edges will otherwise be exposed to the sun, to water, or to physical damage, and
<li>may be specified to cover ''parapet'' caps, sleepers, or curbs
<ol>
<li>for aesthetic reasons, or
<li>to protect the membrane from damage resulting from maintenance (i.e., pressure washing of decks or pavers), or from foot traffic.
</li></ol>
</li></ol>
</li></ol>

====13.1.3.2. Information Required in Specifications====

<ol>
<li>{{hilite | Subject to the requirements in this Standard,|| 2021-February-7 }} the ''Design Authority'' must specify
<ol>
<li>metal type, finish, and gauge,
<li>seam types,
<li>length of flashings (if different from the requirements in this Part), and
<li>method of attachment (concealed or exposed fasteners).
</li></ol>
<li>Design drawings must detail metal flashing profiles desired for the ''project''.
</li></ol>

====13.1.3.3. Securement====

<ol>
<li>Securement of all ''linear metal flashings'' shall be specified in keeping with the application requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]
</li></ol>

====13.1.3.4. Gauge, Dimension Limitations, and Seams====

<ol>
<li>Gauge, dimensions, slope, and length of ''linear metal flashings'' must be specified to conform to the requirements in '''Table 13.1.3.4.-A''' and [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]], but shall not be less than 26-Gauge.
<li>Specified seam types shall conform to the requirements in '''Table 13.1.3.4.-B''' and [[#13.3.2.2. Seams | Article 13.3.2.2.]]
</li></ol>
 
::::::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Table 13.1.3.4.-A. Pre-finished Galvanized Steel Cap (Coping) Flashing (Gauge and Length Requirements)''' Forming Part of Sentence 13.1.3.4.(1).
|-
|}
:{| class="wikitable" style="text-align: left; margin-left: 20pt; margin-right: auto; border: none;"
|-
! Horizontal Span !! Minimum Slope !! Gauge !! Maximum Flashing Segment Length !! Seam Options
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | Up to 304.8 mm (12") || rowspan="2" style="vertical-align:centre;text-align:center;" | 2% || 26, 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | ≤ 3048 mm (120")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 304.8 - 914.4 mm (12" to 36") || rowspan="2" style="vertical-align:centre;text-align:center;" | 4% || 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | ≤ 3048 mm (120")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 914.4 mm (36") or greater || rowspan="2" style="vertical-align:centre;text-align:center;" | 6% || 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | ≤ 1219.2 mm (48")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | Up to 304.8 mm (12") || rowspan="2" style="vertical-align:centre;text-align:center;" | 2% || 24 || rowspan="6" style="vertical-align:centre;text-align:center;" |3048 mm (12"), as specified by a ''registered professional'' || S-lock or Standing Seam†
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 304.8 - 914.4 mm (12" to 36") || rowspan="2" style="vertical-align:centre;text-align:center;" | 4% || 24 || S-lock or Standing Seam†
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 914.4 mm (36") or greater || rowspan="2" style="vertical-align:centre;text-align:center;" | 6% || 24 || S-lock or Standing Seam†
|-
| 22+ || Butt Seams*
|}
::''*'' Ref. [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]
::† Seam type shall be determined by the ''registered professional'' but when the flashing exceeds 3048 mm (120”) in length and linear expansion or contraction will be greater than 6.35 mm (¼”), only S-locks or Butt Seams shall be used.

::::::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Table 13.1.3.4.-B. Pre-finished Galvanized Steel Vertical Flashing (Gauge and Length Requirements)''' Forming Part of Sentence 13.1.3.4.(2).
|-
|}

:::::{| class="wikitable" style="margin-left: 0pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:center;"
|-
! Vertical Face !! Gauge!! Maximum Flashing Segment Length !! Vertical Seam Options
|-
| Up to 152.4 mm (6") || 26 || ≤ 3048 mm (120") || S-lock
|-
| Up to 203.2 mm (8") || 24 || ≤ 3048 mm (120") || S-lock
|-
| Up to 304.8 mm (12") || 22+ || ≤ 3048 mm (120") || Butt Seams*
|-
| Up to 152.4 mm (6") || 24 || rowspan="3" style="vertical-align:centre;text-align:center;" | >3048 mm (120”), as specified by a ''registered professional'' || S-lock*†
|-
| Up to 203.2 mm (8") || 24 || S-lock*†
|-
| Up to 304.8 mm (12") || 22+ || S-lock or Butt Seams*†
|-
|}
::''*'' Ref. [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]
::† Seam type shall be determined by the ''registered professional'', but when the flashing exceeds 3048 mm (120”) in length and linear expansion or contraction will be greater than 6.35 mm (¼”), only S-locks or Butt Seams shall be used.

====13.1.3.5. Fit and Finish====

<ol>
<li>Fit and finish of all ''linear metal flashings'' shall conform to the requirements in [[#13.2.2. Fabrication and Finish | Subsection 13.2.2.]]
<li>''Drip edges'' are not required but are strongly recommended for ''linear metal flashings'' installed around the outside perimeter of a building, to protect ''wall'' finishes (Ref. [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1.]] for fabrication requirements).
<li>Stainless steel flashings and fasteners are recommended for use in environments where significant corrosion may occur (e.g., near salt-water coastlines) (See [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]] for stainless steel material requirements).
</li></ol>

====13.1.3.6. Cap Flashing, Counterflashing, and Reglet Flashing====

<ol>
<li>Cap (coping) flashings
<ol>
<li>are required for all ''parapets'' (including ''parapets'' on ''waterproofing assemblies'' that are adjacent to each other),
<li>are optional for ''control joints'' (area dividers) that are fully enveloped with waterproofing membrane (Ref. [[#10.3.6.2. Control Joints (Roof Dividers) | Article 10.3.6.2.]]), and
<li>are recommended on ''control joints'' (area dividers) where the membrane may be susceptible to abrasion or mechanical damage.
</li></ol>
<li>All linear metal cap (coping) flashing specified for ''parapets'' shall indicate securement to a solid substrate
<ol>
<li>at every seam, using S-locks or standing seam clips (Ref. [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]),
<li>beneath the outside vertical face of the flashing, using hidden clips (Ref. [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3.]]), and
<li>on the waterproofing side (inside) face of the flashing.
</li></ol>
<li>The use of exposed fasteners on the exterior face of cap (coping) flashing specified for ''parapets'' is not permissible.
<li>When the top surface of a ''wall'' exceeds 101.6 mm (4") in width, linear metal coping (cap) flashing must be specified with a minimum slope of 2% toward the waterproofing side of the ''parapet'', to promote drainage (drainage toward the exterior of a building is not recommended).
<li>All metal cap (coping) flashing must be designed with full, solid support.
<li>When the specified cap flashing material is thicker or heavier than 18-gauge steel or aluminum, or it exceeds the permissible weight or gauge ranges for copper or zinc flashings, the seam and securement design must be submitted to the '''''Guarantor''''' for review prior to tender (See [[#13.3.2.2. Seams | Article 13.3.2.2.]] concerning flat butt seams).
<li>Base metal flashings used to conceal wall materials or to restrain filtration materials and drainage boards must be fashioned to conform to [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1.]] and [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3.]]
</li></ol>

====13.1.3.7. Intersections with Other Assemblies====

<ol>
<li>Where a ''parapet'' intersects with a ''wall'', the union must be designed to direct water to the ''waterproofing system'', away from the outer surface of the ''wall'', using a metal saddle assembly in combination with the membrane requirements in [[#10.3.4.1. Parapets | Article 10.3.4.1.]] (Ref. [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3.]]).
</ol></li>

==Section 13.2. Materials==
(Ref. [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]] concerning limitations and exclusions for metal flashing.)

===13.2.1. Material Properties===
====13.2.1.1. Manufacturing and Supply====

<ol>
<li>''Linear metal flashings'' must be new, manufactured and supplied by the ''Contractor'' or by an Associate Member of the RCABC, and must conform to the requirements published in this Part.
</ol></li>

====13.2.1.2. Sheet Metal Grade and Gauge====

<ol>
<li>A mill certificate must be provided by the ''Contractor'' when requested by the ''Design Authority''.
<li>When stainless-steel metal flashings are specified, grade 304 stainless steel conforming to the requirements in Clause (3)(2) may be used in most applications but when flashings will be subject to regular or constant immersion in water (especially in a coastal environment), or to corrosive environments, the flashings should be manufactured from Grade 316L stainless steel conforming to the requirements below.
<li>The following minimum gauges and/or weights of sheet steel materials apply to all ''linear metal flashings'' (the reference standard for gauges is USS REV (metric in mm)):
<ol>
<li>'''Galvanized steel''': minimum 0.50 mm (0.0196", 26-gauge) galvanized steel sheet, conforming to ASTM A653 / A653M-06 CS Type B, Z275 (G90) coating. Thickness tolerance as per ASTM A924/A924M-06 ±0.08 mm (0.003") for sheet widths not exceeding 1524 mm (60").
<li>'''Stainless Steel Grade 304''': minimum 0.38 mm (0.014", 28-gauge) stainless steel, Grade 304, conforming to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”. Maximum thickness tolerance variation ± 0.04 mm (0.0015") based on 1219.2 mm (48") wide sheet (See [[Notes to GLW Standard#A-13.2.1.2.(3)(2) | Note A-13.2.1.2.(3)(2)]]).
<li>'''Stainless Steel Grade 316L''': minimum 0.38 mm (0.014", 28-gauge) stainless steel, conforming to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”.
<li>'''Aluminum-Zinc alloy-coated steel''': minimum 0.50 mm (0.0196", 26-gauge) aluminum-zinc alloy coated steel sheet, conforming to ASTM A792/A792M-06 CS Type B, AZM150 (AZ50) coating. Thickness tolerance as per ASTM A924/A924M-06 ±0.08 mm (0.003") for sheet widths not exceeding 1524 mm (60").
</li></ol>
<li>The following minimum gauges and/or weights of non-ferrous materials apply to all ''linear metal flashings'':
<ol>
<li>'''Aluminum''': minimum 0.80 mm (0.032", 20-gauge) aluminum sheet, utility quality to CSA HA Series - 1975, plain or embossed finish. Maximum thickness tolerance variation ± 0.06 mm (0.0025") based on 1219.2 mm (48") wide sheet.
<li>'''Copper''': minimum 0.56 mm (24-gauge; 0.0216", 16 oz.) copper sheet, cold rolled roofing copper to ASTM B370-81. Maximum thickness tolerance variation ± 0.09 mm (0.0035") based on 1219.2 mm (48") wide sheet.
<li>'''Zinc''': minimum 0.80 mm (0.031") zinc Sheet conforming to European standard EN 988-1996. Maximum thickness tolerance variation ± 0.03 mm (0.0012").
</li></ol>
<li>Where a ''waterproofing system'' adjoins and "Architectural Sheet Metal System", ''linear metal flashings'' must be fabricated from 24-gauge steel stock.
</li></ol>

====13.2.1.3. Fasteners====

<ol>
<li>Fasteners must be
<ol>
<li>threaded screws, friction-type pins (i.e., for masonry or concrete), plug (inserts), or rivets (where permitted),
<li>compatible with materials they contact,
<li>corrosion-resistant,
<li>specified by the ''Design Authority'', and
<li>appropriately sized, in both length and thread type, for the material to which they will be secured.
</li></ol>
<li>Nails are not acceptable as fasteners.
<li>Notwithstanding the requirements in Sentence (1), threaded fasteners used to secure linear metal flashings
<ol>
<li>in concealed locations must be at least No. 8, corrosion-resistant screw or expansion fastener with a low-profile head and must be compatible with both the metal flashing material and the substrate.
<li>in exposed locations must be at least No. 10., shall be gasketed (cladding screws), and must match the colour of the materials they fasten.
</li></ol>
<li>When pre-engineered ''linear metal flashing systems'' are specified, fasteners provided by the manufacturer must be used.
<li>Rivets shall be closed-end, dome-head type, and shall be used only for fastening together linear metal flashings.
</li></ol>

====13.2.1.4. Sealants====

<ol>
<li>Sealants shall be
<ol>
<li>non-hardening high-quality butyl or polyurethane,
<li>available in either gun grade or sealant tape form,
<li>suitable for exterior use and able to resist the effects of weathering, and
<li>compatible with, and able to adhere to, the materials to which they are applied.
</ol></li>
<li>Sealants shall conform to
<ol>
<li>CGSB 19-GP-5M, “Sealing Compound, One Component, Acrylic Base, Solvent Curing”,
<li>CAN / CGSB-19.13, “Sealing Compound, One Component, Elastomeric, Chemical Curing”,
<li>CGSB 19-GP-14M, “Sealing Compound, One Component, Butyl-Polyisobutylene Polymer Base, Solvent Curing”, or
<li>CAN / CGSB-19.24, “Multi-Component, Chemical Curing Sealing Compound”.
</ol></li>
</ol></li>

===13.2.2. Fabrication and Finish===
====13.2.2.1. Fabrication of Flashing====

<ol>
<li>Linear metal flashings must be new, must conform to the requirements published in this Part, and shall be manufactured and supplied
<ol>
<li>by the ''Contractor'',
<li>for the ''Contractor'' by another ''Contractor'' (RCABC Member), or
<li>by an ''Associate Member'' of the RCABC.
</ol></li>
<li>Unless expressly accepted by the '''''Guarantor''''', all linear metal flashing fabricated by the ''Contractor'' shall conform to the requirements in this Part.
{{strike| Specified drip edges must be broken (bent) outward from the face of the flashing by at least 30° and shall measure at least 19.05 mm (3/4”), extending from the break. || 2025-October-22 }}
<li>All ''linear metal flashing'', except those that are pre-engineered and expressly accepted by the RGC,
<ol>
<li>must be hemmed, and
<li>shall conform to the minimum requirements in '''Table 13.1.3.4.-A''' and '''13.1.3.4.-B.'''
</ol></li>
<li>Slotted holes, to allow for the coefficient of expansion, are recommended for any length of linear metal flashing, where gasketed screws are used to secure it (See '''Figure 13.2.2.1.-A'''. Also see [[Notes to GLW Standard#A-13.2.2.1.(4)|Note A-13.2.2.1.(4)]]).
<li>The vertical leg of any ''linear metal flashing'' that overlaps roofing material
<ol>
<li>must be at least 76.2 mm (3") in height, exclusive of the drip or hemmed edge, when measured between each break,
<li>and shall overlap the edge of a membrane (i.e., membrane flashing on a wall) by at least 25.4 mm (1”).
</ol></li>
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.2.2.1.-A Roof-side face of cap flashing showing slotted hole for gasketed fastener''' Forming Part of Article 13.2.2.1. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.2.2.1.-A.png |link=https://rpm.rcabc.org/images/b/bb/Part_13_-_Illustration_-_Figure_13.2.2.1.-A.png | 600 px]]
|}

<li>All hemmed ''drip edges'' shall be broken (bent) outward from the face of the flashing by at least 30° (See '''Figure 13.2.2.1.-B''').
<li>The fabrication of linear metal flashings longer than 3048 mm (120”) is permissible, provided
<ol>
<li>galvanized steel flashings are manufactured from metal stock 24-gauge or heavier, and
<li>the method of securement, regardless of the material, allows for the coefficient of expansion (See [[Notes to GLW Standard#A-13.2.2.1.(4)| Note A-13.2.2.1.(4)]].
</ol></li>
<li>All Cap (coping) flashing shall be fabricated with a hemmed drip edge at the bottom of the outside vertical face, to receive the cleat (wind clip) (See '''Figure 13.2.2.1.-B''').
<li>Cleats (wind clips) must be fabricated with a hooked edge that both matches the angle of the cap flashing drip edge and will fit inside (be enclosed by) it (See '''Figure 13.2.2.1.-B''').
<li>When the length of cap flashing is equal to or less than 3048 mm (120”), the length of the hemmed drip edge shall be enough to enclose at least 12.7 mm (1/2”) of the cleat (wind clip) (See '''Figure 13.2.2.1.-A'''; also see[[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Clause 13.3.2.3.(2)(1)]]).
<li>When cap flashing is longer than 3048 mm (120”),
<ol>
<li>the cleat (wind clip) for the outside face of a parapet must be
<ol>
<li>continuous (discontinuous cleats (wind clips) are not permitted), and
<li>fabricated from compatible flat metal stock, two gauges heavier than the cap flashing,
</ol></li>
<li>the length of the hemmed drip edge shall be enough to enclose at least 15.88 mm (5/8”) of the hidden clip hook,
<li>the waterproofing-side face of cap flashing must be fabricated to allow for the coefficient of expansion (See [[Notes to GLW Standard#A-13.2.2.1.(4)| Note A-13.2.2.1.(4)]]:
<ol>
<li>If gasketed screws are specified, the flashing must be slotted, based on the engineered securement requirements (See [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3.]]).
<li>If a cleat (wind clip) is specified, the cleat (wind clip) and the drip edge of the flashing shall conform to the requirements for cleat (wind clip) securement on the outside face of the parapet (using hidden clips, which can allow for unfettered expansion and contraction, is considered a best practice);
</ol></li>
and
<li>seams joining lengths of cap flashing together shall conform to the engineered requirements for the flashing system (See '''Table 13.1.3.4.-A''' and '''Table 13.1.3.4.-B''').
</ol></li>
<li>With the exception of ''drip edges'', any break in the vertical face of a linear metal flashing to direct water away from the building shall be at least 30° downward (See '''Figure 13.2.2.1.-B''').
 
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.2.2.1.-B Counter-flashing and cap flashing fabrication requirements''' Forming Part of Article 13.2.2.1. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.2.2.1.-B.png|link=https://rpm.rcabc.org/images/f/fd/Part_13_-_Illustration_-_Figure_13.2.2.1.-B.png | 700 px]]
|}

<li>Base flashing must be fabricated with a drip edge or a flat hemmed edge that, when installed, shall be at least 25.4 mm (1”) above the filtration and drainage course of an insulated ''waterproofing assembly'' or ''overburden'' (See '''Figure 13.3.2.3.-E''').
<li>Metal edge flashing must be fabricated with
<ol>
<li>a flange measuring no less than 101.6 mm (4") in width,
<li>a vertical drop and hemmed drip edge at least 50.8 mm (2"), and (when transitioning to a lower ''water-shedding systems'')
<li>a sloped drop of no less than 101.6 mm (4").
</ol></li>
<li>Metal edge flashing may be constructed with or without an upstand at the outside edge (Edge flashing intended as a drainage edge may perform best without an upstand).
</ol></li>

====13.2.2.2. Pre-painted Finishes====

<ol>
<li>When a painted finish on ''linear metal flashing'' is specified, only SMP and PVDF pre-painted finishes are acceptable.
<li>Where ''Architectural Metal Roofing'' is installed, adjoining ''linear metal flashing'' must have the same finish as the metal panels.
</ol></li>

==Section 13.3. Application==
===13.3.1. Guarantee Term Requirements===
====13.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====13.3.1.2. Reserved====

===13.3.2. All Systems===
====13.3.2.1. General Requirements for Linear Metal Flashing====

<ol>
<li>RoofStar-accepted pre-engineered securement ''systems'' must be secured according to the ''manufacturer’s'' specifications.
<li>All cap (coping) flashings and other ''linear metal flashings'' subjected to wind loads on ''parapets'', roof dividers, firewalls, or any other vertical structure, must be secured to resist displacement by wind load.
<li>All ''linear metal flashing'' installed over an organic substrate (i.e., wood) shall be separated from the substrate with a suitable separation material (i.e., self-adhered bituminous membrane used as eave protection in a ''water-shedding system'').
<li>Unless otherwise provided for in this Part, mechanical fasteners used to secure ''linear metal flashing'' or their clips
<ol>
<li>shall conform to the fasteners requirements in [[#13.2.1.3. Fasteners | Article 13.2.1.3.]],
<li>shall be spaced no more than 304.8 mm (12”) O.C.,
<li>shall be firmly fastened, without distorting secured materials,
<li>must penetrate the substrate as specified in the screw manufacturer’s published minimum values, but shall nevertheless penetrate
<ol>
<li>through the back surface of steel framing at least 19.05 mm (3/4"),
<li>into or through plywood so that screw threads engage its full thickness, excluding the unthreaded tip, and
<li>into solid substrate (i.e., dimensional lumber or concrete) at least 25.4 mm (1"), and
<li>must be installed at least 88.9 mm (3-1/2") above the ''finished system surface''.
</li></ol>
</li></ol>
<li>Canted edge metal flashing may be mechanically fastened from the outside face but shall not be face-fastened on the waterproofing side of the flashing.
<li>Sealants must be tooled to positively shed water.
</li></ol>

====13.3.2.2. Seams====
(The requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1., "General Requirements for Linear Metal Flashing"]], shall be read together with the following requirements. See also [[#13.1.3.4. Gauge, Dimension Limitations, and Seams | Article 13.1.3.4.]])

<ol>
<li>RoofStar-accepted pre-engineered ''linear metal flashing'' may be joined together using seams specified for the accepted flashing.
<li>All ''linear metal flashing'' that is not pre-engineered must be seamed together following the requirements set out in this Article.
<li>All seams must allow for metal expansion and contraction.
<li>The seam and securement design must be approved by the '''''Guarantor''''' when the specified cap flashing material
<ol>
<li>is steel or aluminum, and the material is thicker or heavier than 18-gauge, or
<li>is copper and zinc, and the material thickness or weight exceeds the weight or gauge requirements in [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]]
</li></ol>
<li>'''Straight (linear) joints''' between lengths of ''linear metal flashing'' must be fully seamed using only an Standing Seam ('''Figure 13.3.2.2.-A''') or S-Lock ('''Figure 13.3.2.2.-B'''), but this requirement does not apply to
<ol>
<li>flashing fashioned from 22-gauge metal (or heavier), or
<li>the vertical face of any flashing that is concealed by a ''wall assembly'', counterflashing, or equipment flange, in which case the vertical joint may be lap-seamed, provided the overlap
<ol>
<li>is no less than 101.6 mm (4”) when fully caulked in the lap, or
<li>is no less than 152.4 mm (6”) when installed without caulking in the lap.
</li></ol>
</li></ol>
<li>The top face (horizontal plane) of flashings that intersect at a corner (i.e., coping flashing) must be joined with a standing seam.
<li>Where drip edges meet at an outside corner, the cut edges of the mitred joint must be mechanically connected (Closed with a "rat tail").
<li>When the face of vertically oriented flashing forms an '''outside corner''', and the height of the flashing
<ol>
<li>is greater than 101.6 mm (4”), the two flashings must be joined using only a standing seam.
<li>is 101.6 mm (4”) or less, the two flashings must be joined using
<ol>
<li>a standing seam,
<li>an S-lock, or
<li>a lap joint, but the drip edges must be mechanically connected (Closed with a "rat tail").
</li></ol>
</li></ol>
<li>When the face of vertically oriented flashing forms an '''inside corner''', and the height of the flashing
<ol>
<li>is greater than 101.6 mm (4”), the two flashings must be joined using only a standing seam.
<li>is 101.6 mm (4”) or less, the two flashings must be joined using
<ol>
<li>a standing seam, or
<li>a flat overlapped seam.
</li></ol>
</li></ol>
<li>Sealant applied to S-lock or standing seams is not a requirement in this Standard, but when it is specified
<ol>
<li>the sealant must be applied along the full length of the seam, and
<li>any sealant that extrudes from the seam during the seaming process must be removed and discarded (See [[#1.3.2.2. Workmanship | Article 1.3.2.2., "Workmanship"]]).
</li></ol>
<li>'''Standing seams''' (See '''Figure 13.3.2.2.-A''') must incorporate clips when the seam is longer than 101.6 mm (4”), and the clips must be
<ol>
<li>fabricated from flat metal stock 24-gauge or heavier,
<li>at least 38.1 mm (1-1/2”) wide,
<li>spaced apart from each other no more than 203.2 mm (8”) O.C.,
<li>embedded in an acceptable sealant, and
<li>secured with at least 2 acceptable low-profile flat head screws.
</li></ol>

 
::{|
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.2.-A Standing Seam''' Forming Part of Sentence 13.3.2.2.(5) (Click to expand illustration)
|-
| [[File:MF - Standing Seam.png | link=https://rpm.rcabc.org/images/a/a3/MF_-_Standing_Seam.png | 500 px]]
|}

<li>'''S-locked seams''' (See '''Figure 13.3.2.2.-B''') must be secured through flashing tab (leaf) with at least one (1) acceptable low-profile flat head screw when the seam is longer than 101.6 mm (4”), but fasteners must not be spaced more than 203.2 mm (8”) O.C.
 
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.2.-B S-Lock, Double''' Forming Part of Sentence 13.3.2.2.(11) (Click to expand illustration)
|-
| [[File:MF - S-Lock, Double.png | link=https://rpm.rcabc.org/images/b/b6/MF_-_S-Lock%2C_Double.png | 500 px]]
|}

<li>'''Flat butt seams''' (See '''Figures 13.3.2.2.-C''' and '''13.3.2.2.-D''')
<ol>
<li>are permissible only for cap (coping) flashings, and only when the flashing is fabricated from steel or aluminum ranging in thickness from 22-Gauge to 18-Gauge (the same applies to the equivalents for copper and zinc sheet material, by gauge or weight), and
<li>must have a hemmed front edge fabricated to hook onto a supporting saddle.
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.2.-C Flat butt seams''' {{hilite | Forming Part of Article 13.3.2.2. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.2.-C.png|link=https://rpm.rcabc.org/images/f/f0/Part_13_-_Illustration_-_Figure_13.3.2.2.-C.png | 600 px]]
|}

::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.2.-D Flat butt seams''' {{hilite | Forming Part of Article 13.3.2.2. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.2.-D.png|link=https://rpm.rcabc.org/images/9/92/Part_13_-_Illustration_-_Figure_13.3.2.2.-D.png | 600 px]]
|}

<li>The saddle for flat butt seams (See '''Figures 13.3.2.2.-C''' and '''13.3.2.2.-D''') must be
<ol>
<li>manufactured from the same material as the flashing,
<li>formed to match the profile of the cap flashing,
<li>fabricated with a hook along the front face,
<li>secured to the parapet with screws,
<li>installed to underlap the butt joint by at least 101.6 mm (4”) on either side,
<li>seated in two parallel beads of un-tooled sealant or butyl tape, which must be applied between the saddle and flashing, on either side of the butt joint, to all three adjoining faces, and
<li>secured to the cap flashing along both faces of the parapet (See [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]).
</li></ol>
</li></ol>

====13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing====
(The requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1., "General Requirements for Linear Metal Flashing"]], shall be read together with the following requirements)

<ol>
<li>Cap (coping) flashings must be
<ol>
<li>solidly and fully supported,
<li>separated from organic materials (i.e., wood) with roofing membrane, and
<li>joined using standing seams or S-locks (Ref. [[#13.3.2.2. Seams | Article 13.3.2.2.]]).
</li></ol>
<li>In addition to the above requirements, cap (coping) flashing installed on ''parapets''
<ol>
<li>must be secured to the outside face of the ''parapet'' with a cleat (wind clip) that hooks into the ''drip edge'' or hem of the cap flashing (See [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1., "Fabrication"]]; see also '''Figure 13.3.2.3.-A''').
<li>shall be secured along the roof-side of the ''parapet'' using either cleats (wind clips) or cladding fasteners (the method used shall be specified by the ''Design Authority'' or, when required, by a ''registered professional''), and
<li>shall not be secured to the outside face of a ''parapet'' with exposed fasteners.
</li></ol>
<li>Cleats (wind clips) shall be secured to the vertical face of a ''parapet'' and shall not be mechanically attached to the top face unless otherwise permitted in this Standard or by a written Variance from the '''''Guarantor'''''.
<li>Where cleats (“wind clips”) are required, they must
<ol>
<li>conform to the fabrication requirements in [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1.]], and
<li>be fastened as close to the bottom edge (hook) as practical but must not be fastened further than a maximum of {{hilite | 25.4 mm (1") from the bottom edge (hook).
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.3.-A General requirements for cap flashing securement''' Forming Part of Article 13.3.2.3. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.3.-A.png|link=https://rpm.rcabc.org/images/b/b9/Part_13_-_Illustration_-_Figure_13.3.2.3.-A.png | 600 px]]
|}
 
<li>The securement of ''parapet'' cap (coping) flashings longer than 3048 mm (10’) shall conform to stamped, engineered shop drawings produced by a ''registered professional'' retained by the ''Contractor''; all shop drawings shall form part of the submittal package required in [[#1.3.2.4. Contractor Submittals | Article 1.3.2.4., “Contractor Submittals”]].
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.3.-B Spacing of gasketed fasteners used on roof-side face of cap flashing''' Forming Part of Article 13.3.2.3. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.3.-B.png|link=https://rpm.rcabc.org/images/d/d7/Part_13_-_Illustration_-_Figure_13.3.2.3.-B.png | 600 px]]
|}
 
<li>Cap (coping) flashings installed on ''control joints'' (area dividers) and fire separation ''walls'' (Ref. Article 10.3.4.4. of the applicable ''waterproofing roof'' Standard) shall conform to the requirements in Sentence (2), and
<ol>
<li>may be face-fastened, provided the area divider or fire separation ''wall'' is less than 1 m (39") tall, but
<li>shall be secured with hidden clips on both sides when the area divider or fire separation ''wall'' exceeds a height of 1 m.
</li></ol>
<li>When using exposed screws to secure cap (coping) flashing is permissible, screws shall be located no more than 25.4 mm (1") above the break for the ''drip edge'' and provision shall be made for metal expansion and contraction (See [[Notes to GLW Standard#A-13.2.2.1.(4) | Note A-13.2.2.1.(4)]] and '''Figure 13.3.2.3.-C''').
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.3.-C Securement of cap flashing on exterior face of parapet wall''' Forming Part of Article 13.3.2.3. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.3.-C.png|link=https://rpm.rcabc.org/images/3/30/Part_13_-_Illustration_-_Figure_13.3.2.3.-C.png | 600 px]]
|}
 
<li>Exposed fasteners used to secure the waterproofing side face of cap flashing longer than 3048 mm (10’) shall be equally spaced along the length of the flashing but shall not be further apart than 762 mm (30”).
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.3.-D Securement of cap flashing on waterproofing side of parapet wall''' Forming Part of Article 13.3.2.3. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.3.-D.png|link=https://rpm.rcabc.org/images/0/01/Part_13_-_Illustration_-_Figure_13.3.2.3.-D.png | 600 px]]
|}
 
<li>'''Continuous concealed clips''' must be attached with fasteners spaced nor more than 304.8 mm (12") O.C.
<li>'''Discontinuous concealed clips''' must
<ol>
<li>consist of a single clip, centered between the seams of each length of metal flashing,
<li>measure at least 1/3 of the length of flashing it will secure but shall not be less than 101.6 mm (4") in length, and
<li>be fastened with screws spaced no more than 304.8 mm (12") O.C.
</li></ol>
<li>Fasteners used to secure any cap, counter, or base flashing must be evenly spaced between seams along each length of flashing, and shall be
<ol>
<li>no fewer than three (3) fasteners for every 3048 mm (120") length of metal flashing ('''Figures 13.2.3.3.-B''' and '''13.3.2.3.-D'''), or
<li>two (2) fasteners for every 2438.4 mm (96") length of metal flashing.
</li></ol>
<li>When cap (coping) flashings span widths greater than 304.8 mm (12”), and a flat butt seam is specified, the cap flashing must be riveted to the saddle to ensure adequate securement, and the rivets must be no further apart than 203.2 mm (8”) (See '''Figures 13.3.2.2.-A''' and '''13.3.2.2.-B''').
<li>Parapets that intersect a wall must be flashed with a metal saddle flashing, as shown in the "Construction Details for Linear Metal Flashings" ([[Division_D | Division D]]).
<li>When the outside face of a cap flashing is concealed by a wall assembly, only the outside face may be lap-seamed, provided the overlap is no less than 101.6 mm (4”) and the overlapping metal is embedded in mastic.
<li>Counterflashing must be secured to the vertical face, with fasteners or a reglet.
<li>Counterflashing and termination bars installed as primary securement or protection of membrane flashing
<ol>
<li>must be hemmed at the top edge and bent (broken) outward from the face of the wall by at least 45°, to form a groove for sealant (The hem shall measure at least 15.88 mm (5/8”) when measured from the break),
<li>shall be attached to the substrate with fasteners spaced no more than 304.8 mm (12”) O.C., and
<li>must be sealed along the top groove with a continuous bead of acceptable sealant, tooled to shed water away from the wall.
</li></ol>
<li>A second counterflashing (to cover a term bar or primary counterflashing)
<ol>
<li>applied as a “surface reglet” must be hemmed, broken, and sealed, as described above in this Article, and
<li>must be secured with fasteners spaced no more than 304.8 mm (12”) O.C., but this spacing may be increased to no more than 609.6 mm (24”) O.C., provided the flashing maintains continuous contact with the substrate (See [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]).
</li></ol>
<li>Base flashings
<ol>
<li>must be installed so that the bottom of a drip or hemmed edge is kept at least 25.4 mm (1") above the filtration layer and drainage course of an insulated ''waterproofing assembly'' or any ''overburden'' (see '''Figure 13.3.2.3.-E.'''),
<li>must be secured with fasteners spaced no more than 304.8 mm (12”) O.C., and
<li>may be fashioned as one piece, or as a 2-piece flashing that includes a lower, detachable segment to facilitate ''waterproofing system'' maintenance.
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.3.-E Base metal wall flashing''' Forming Part of Article 13.3.2.3. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.3.-E.png|link=https://rpm.rcabc.org/images/7/7b/Part_13_-_Illustration_-_Figure_13.3.2.3.-E.png | 800 px]]
|}

<li>''Linear metal flashing'' secured in a ''reglet'' (cut groove) must be
<ol>
<li>installed above the membrane flashing,
<li>inserted into the ''reglet'' at least 12.7 mm (1/2”),
<li>friction-fitted within the ''reglet'' or secured on the exposed face with an acceptable fastener, and
<li>sealed with a continuous bead of tooled gunnable sealant.
</li></ol>
<li>Where parallel and overlapping reglet flashings are used, the joints between flashing segments must be offset by at least 304.8 mm (12”), except at corners.
</li></ol>

====13.3.2.4. Reserved====

====13.3.2.5. Reserved====

<hr>
<div id=PART_14></div>

=Part 14 - Waterproofing as a Platform=
==Section 14.1. Design==
(This Part covers the design and installation requirements for ''waterproofing assemblies'' that support an ''overburden'', which may be structurally supported or directly supported by the ''waterproofing assembly'')

(See [[Notes to GLW Standard#A-14.1. | Note A-14.1.]])

===14.1.1. General===
====14.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====14.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Overburden'' means any material, structure or item of equipment that is placed on top of (but not fastened to or through) a ''waterproofing system'' (roof, or at grade). Gravel or pavers are considered ''overburden'' when they do not function as securement for the ''waterproofing assembly''.
<li>''System Coverings'' means (without limitation) gravel, wearing surfaces, landscaping, pavers, cast-in-place concrete, and rubberized surfaces, broadly covering and directly superimposed on the ''waterproofing assembly'' (See [[Notes to GLW Standard#A-14.1. | Note A-14.1.1.2.(1)]]).
<li>''Structures and Equipment'' means structurally supported or portable objects including (without limitation) wood or composite decks and walkways, planters, "amenity spaces" (inclusive of furnishings, hot tubs, gazebos, pergolas, and play areas), nets and wind screens, photovoltaics, satellite equipment, light standards, lightning rods, sculptures, pools, and other water features.
</li></ol>
</li></ol>

===14.1.2. Guarantee Term Requirements===
====14.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====14.1.2.2. Reserved====

====14.1.2.3. Reserved====

===14.1.3. All Systems===
====14.1.3.1. Coverage and Limitations====

<ol>
<li>Coverage under the '''''RoofStar Guarantee''''' shall be as described in [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]]
</li></ol>

====14.1.3.2. Loads====

<ol>
<li>The building structure must be designed to support any live loads specified by the Code having jurisdiction, including loads from any ''system covering'', amenity space, structure, or live loads superimposed upon the ''waterproofing assembly''.
<li>Structural supports (i.e., curbs) should be considered to bear heavier dead loads, to resist ''specified wind loads'', or to secure the equipment during seismic events.
</li></ol>

====14.1.3.3. Securement of System Coverings, Structures, and Equipment====

<ol>
<li>The ''Design Authority'' is responsible for specifying the appropriate securement design of ''system coverings'', structures, and equipment, to resist ''specified wind loads''.
<li>Where structural securement is desirable or required,
<ol>
<li>structural supports must be fully waterproofed (curbs, sleepers, posts) and
<li>the superimposed structure or equipment must be secured to the structural support at least 203.2 mm (8”) above the ''drainage plane'' (See [[#Part 12 - Penetrations and Curbs | Part 12 - Penetrations and Curbs]], and [[#Part 3 - Securing the Roof Assembly | Part 3 - Securing the Roof Assembly]]).
</li></ol>
</li></ol>

====14.1.3.4. Design for Repairs and Renewal====

<ol>
<li>Each design should, without limitation, include consideration for
<ol>
<li>the inevitability of ''waterproofing system'' repairs or replacement,
<li>access for maintenance, and
<li>material removal, storage, and replacement logistics.
</li></ol>
</li></ol>

====14.1.3.5. Waterproofing Membranes====

<ol>
<li>Membranes must be selected for their ability to resist accidental puncture by human activity on the ''waterproofing assembly''; except for hot fluid-applied rubberized asphalt, the minimum puncture resistance must be at least 400 N (See Table 9.2.1.1. in [[#9.2.1.1. Membrane Composition, Thickness, and Selection | Article 9.2.1.1.]]).
</li></ol>

====14.1.3.6. Membrane Protection====

<ol>
<li>Membranes must be protected from damage incurred
<ol>
<li>during the construction of a building,
<li>from normal use and occupancy of the ''deck'' protected by the ''waterproofing system'', and
<li>from maintenance of any installation on top of a ''waterproofing system'', after the building has been commissioned.
</li></ol>
<li>Where membranes installed on vertical surfaces may be damaged from foot traffic or shifting coverings, they must be protected (i.e., with base metal flashing; ref. [[#13.1.3.6. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.1.3.6.]]).
</li></ol>
</li></ol>

====14.1.3.7. Membrane Integrity Testing and Electronic Leak Detection====
(See [[#1.1.3.3. Membrane Integrity Testing | Article 1.1.3.3.]] and [[#1.1.3.4. Electronic Leak Detection | Article 1.1.3.4.]])

====14.1.3.8. Drainage====

<ol>
<li>''Waterproofing assemblies'' that will be covered with ''overburden'', including amenity spaces or equipment, must promote unimpeded drainage of storm or irrigation water.
<li>Where a ''system covering'' material naturally drains (i.e., gravel), no additional drainage design is required, but when it does not naturally drain, or when the ''system covering'' may introduce a “vapour closed” condition, the system shall conform to the requirements in [[#7.1.6.2. Drainage Mats and Filter Fabric | Article 7.1.6.2.]]
<li>''Overburden'' must be contained with drain guards, rigid barriers, and filter fabric (See also [[#11.3.2.3. Drain Protection Against Blockage | Article 11.3.2.3.]]).
<li>To facilitate the adequate movement of water and minimize or prevent damming when non-structural supports are oriented perpendicular to (across) the direction of drainage, the design must
<ol>
<li>specify shorter supports, to a maximum length of 1219.2 mm (48"), and
<li>incorporate drainage mats beneath supports longer than 1219.2 mm (48") in any direction.
</li></ol>
<li>Equipment installed on structural supports, or on top of the ''waterproofing system'', must be spaced or located to promote access to ''drains'', ease of maintenance, and worker or occupant safety.
</li></ol>

====14.1.3.9. Filter Fabric====

<ol>
<li>Filter fabrics are required when the ''waterproofing assembly'' supports
<ol>
<li>any ''overburden'', including landscaping,
<li>sand and other fine materials,
<li>gravel with a diameter less than 12.7 mm (1/2”),
<li>wet mortar or concrete, or
<li>XPS insulation above the membrane (See [[Notes to GLW Standard#A-14.1.3.9. | Note A-14.1.3.9.]]).
</li></ol>
</li></ol>

====14.1.3.10. Decorative Stone (Aggregate Rock) Covering====
(See [[Notes to GLW Standard#A-14.1.3.10. | Note A-14.1.3.10.]])

<ol>
<li>When smooth stone (aggregate rock) is specified as the ''system covering'' (different from ballast),
<ol>
<li>only washed gravel may be used, and
<li>the design must include gravel guards around ''drains''.
</li></ol>
<li>When the aggregate rock used as a ''system covering'' is crushed, or is smaller than 12.7 mm (1/2”),
<ol>
<li>a geotextile protection layer must be installed immediately above the waterproofing membrane, and
<li>the crushed aggregate must be deep enough to hold the geotextile protection layer in place.
</li></ol>
</li></ol>

====14.1.3.11. Wearing Surfaces====
(See also [[#9.1.3.4. Membrane Protection | Article 9.1.3.4.]] concerning wearing surfaces and drainage requirements)

<ol>
<li>Any wearing surface may be installed on an ''uninsulated assembly'', provided
<ol>
<li>the wearing surface does not bond with or touch the field waterproofing membrane or membrane flashing, and
<li>drainage of storm or irrigation water is not impeded.
</li></ol>
<li>When a wearing surface is specified,
<ol>
<li>it must incorporate measures to protect the waterproofing membrane from damage,
<li>perimeter membranes and penetrations must be protected from abrasion by the wearing surface,
<li>the design must provide a drainage space below the wearing surface measuring at least 12.7 mm (1/2”) in depth, and
<li>the design must provide a vertical drainage gap between the wearing surface and any openings.
</li></ol>
<li>Accessible wearing surfaces that permit relatively easy access to the waterproofing membrane, for serviceability and repairs, are strongly recommended.
<li>When cast-in-place concrete is specified as the wearing surface (See [[Notes to GLW Standard#A-14.1.3.11. | Note A-14.1.3.11.]]), the design must conform to the other requirements in this Article, and the membrane, including membrane flashing, must be kept separate from the concrete with
<ol>
<li>a bond-breaking material, such as a proprietary drainage mat or XPS insulation, and
<li>filter fabric or a barrier material acceptable to the membrane manufacturer, able to prevent the concrete slurry from reaching the membrane.
</li></ol>
<li>Scoring solid cast-in place concrete protection slab (split-slab) and asphalt paving wearing courses, using straight surface score lines (indents) spaced no more than 2 m (78-3/4”) apart, formed in a grid pattern (squares, rectangles, diamonds, etc.), is recommended to facilitate cutting for removal of wearing course sections, to locate possible breaches in membranes; the casting and scoring of concrete wearing courses is the work of others).
</li></ol>

====14.1.3.12. Reserved====

====14.1.3.13. Structures and Equipment====

<ol>
<li>Non-structural installations superimposed on a ''waterproofing assembly'' (See '''Figure 14.1.3.13.-A''')
<ol>
<li>are recommended for smaller installations, to
<ol>
<li>minimize the number of penetrations, curbs, or sleepers necessary for structural securement,
<li>eliminate possible weak points in the ''waterproofing system'', where a leak may occur,
<li>avoid dedicated mechanical drainage, and
<li>simplify removal of materials when membrane repairs are required.
</li></ol>
<li>must take into account inevitable ''waterproofing system'' renewal (see [[Notes to GLW Standard#A-14.1.3.13. | Note A-14.1.3.13.]]),
<li>shall be designed for stability and able to resist movement, including seismic movement, but shall not be anchored into the ''waterproofing system'',
<li>must be placed on an appropriate protection layer or supported by pedestals, pavers, or other means of distributing weight and point loading, or placed on
<ol>
<li>a suitable drainage layer conforming to [[#14.2.1.4. Drainage Materials | Article 14.2.1.4.]], and
<li>an appropriate protection layer, and
</li></ol>
<li>may be placed on an insulated ''waterproofing system'' provided the insulation will support all anticipated dead loads, live loads and point loads (See [[#14.1.3.2. Loads | Article 14.1.3.2., "Loads"]]).
</li></ol>
<li>When “structural” ''walls'', planters, equipment pads, and other installations are
<ol>
<li>'''cast-in-place concrete''' without a pre-curb, they may be formed, reinforced, and poured directly on the slab, before it is waterproofed, but they must then be fully enveloped with waterproofing membrane (See '''Figure 14.1.3.13.-B''').
<li>'''cast-in-place concrete''' and are formed, reinforced, and poured over a pre-curb as described and required in this Article (See '''Figure 14.1.3.13.-C'''),
<ol>
<li>the pre-curb must be fully enveloped with waterproofing membrane, as part of the primary waterproofing, and
<li>the inside of planter ''walls'' must be sealed with waterproofing membrane as required in [[#14.3.2.7. Structures and Equipment | Article 14.3.2.7.]]
</li></ol>
<li>'''masonry''' (See '''Figure 14.1.3.13.-D'''), they must be anchored to the structural ''deck'' with internal reinforcement but may be waterproofed using either of the methods described for cast-in-place elements.
<li>'''pre-cast''', they must be secured
<ol>
<li>to a pre‐curb that is continuously waterproofed as a continuation of the primary waterproofing membrane, or
<li>to structural supports that are waterproofed in keeping with the requirements in [[#Part 12 - Penetrations and Curbs | Part 12]].
</li></ol>
</li></ol>
<li>When concrete ''walls'' or structures are constructed without a pre-curb, all concrete surfaces must be fully and continuously enveloped with the primary waterproofing membrane (See also [[Guarantee#3.2.1.3. Excluded Causes of Leaking | Division A, Article 3.2.1.3. Excluded Causes of Leaking]]).
<li>Pre‐curbs must be
<ol>
<li>at least 101.6 mm (4") in height above the ''drainage plane'' of the highest adjacent ''waterproofing assembly'' (See [[Notes to GLW Standard#A-14.1.3.13.(4) | Note A-14.1.3.13.(4))]],
<li>completely enveloped with fully adhered acceptable membrane flashing (including all faces of drainage knock‐outs),
<li>reinforced with dowels epoxied into the pre-curb (see [[#14.3.2.7. Structures and Equipment | Article 14.3.2.7.]]), and
<li>properly waterproofed around dowels in their final position, using
<ol>
<li>a 2-component catalyzed polymethyl methacrylate (PMMA) or polyurethane methyl methacrylate (PUMA) reinforced liquid membrane flashing system, or
<li>two cured coats of an RGC-accepted polyurethane or silicon-based single-component liquid flashing system (See [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6., "Liquid Membrane Flashing"]]).
</li></ol>
</li></ol>
<li>Every planter design must be designed to drain water out of the planter.
<li>Structural planters that adjoin
<ol>
<li>an uninsulated ''waterproofing assembly'' may be drained with
<ol>
<li>a plumbed mechanical ''drain'', or
<li>drainage knock-outs in the pre-curb ''wall'', which should be wide enough to allow for the free flow of water over or past of the membrane flashing plies.
</li></ol>
<li>an insulated ''waterproofing assembly'' shall be drained by only plumbed mechanical drains; knock-outs through a pre-curb are not permissible.
</li></ol>
<li>A design review is advisable when a structural water feature incorporates penetrations for wiring, lights, or other submerged features.
<li>Tiles or other architectural finishes may be applied to the waterproofing membrane, subject to a written Variance from the '''''Guarantor''''' and approval by the membrane manufacturer (See [[#1.1.3.6. Variances | Article 1.1.3.6., "Variances"]]).
<li>''Drains'', re-circulation inlets, and outlets used in water features, must include clamping rings, and must be sealed to the membrane ''assembly''.
<li>When a leak detection system is specified, only non‐ferrous metal ''drains'' may be used.
</li></ol>
</li></ol>
</li></ol>

==Section 14.2. Materials==
===14.2.1. Material Properties===
====14.2.1.1. Field and Flashing Membranes====

<ol>
<li>Refer to Article 9.2.1.1. of the published RGC Standard for the specific membrane:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>Single and 2-component liquid membrane flashing systems used on any detail, including pre-curbs, must be listed in [[Division_C | Division C]], and must be proprietary to, or accepted by, the ''manufacturer''.
</li></ol>

====14.2.1.2. Membrane Protection====

<ol>
<li>Refer to [[#9.3.2.7. Protection of Membranes | Article 9.3.2.7.]]
</li></ol>

====14.2.1.3. Reserved====

====14.2.1.4. Drainage Materials====

<ol>
<li>Drainage mats, geo-synthetic drainage cores, and geo-composites used beneath any non-vegetated ''overburden'' and above insulation (when it is specified),
<ol>
<li>may be manufactured with a factory laminated filter fabric, which are designed to resist damage from the weight of the specified ''overburden'',
<li>should be
<ol>
<li>molded (dimpled) or woven plastic grids with a minimum thickness (depth) of 9.5 mm (3/8") thick, and
<li>designed to provide uniform support as well as traffic-bearing properties for overburdens and wearing courses, and
</li></ol>
<li>must be
<ol>
<li>acceptable to manufacturers of both the membrane and insulation,
<li>suitable for the installed ''system covering'',
<li>selected for their ability to support dead loads, live loads, and point loads, and
<li>capable of permitting the anticipated flow rate of water.
</li></ol>
</li></ol>
<li>Proprietary geocomposite and geosynthetic panels must be designed with sufficient compressive strength to support the design load of ''overburdens'' as well expected live loads and be acceptable for use by th''e membrane manufacturer''.
</li></ol>

====14.2.1.5. Insulation and Insulation Overlays====
(See [[#Part 7 - Insulation | Part 7, "Insulation"]], and [[#Part 8 - Insulation Overlays | Part 8, "Insulation Overlays"]])

<ol>
<li>All insulation specified for use in a ''waterproofing system'' must be XPS and shall conform to the requirements in [[#7.2.2.1. Extruded Polystyrene Insulation | Article 7.2.2.1.]] and shall be capable of supporting any superimposed loads.
<li>When XPS (with or without a concrete topping) is specified as the drainage layer, it must be grooved (by the manufacturer, or as a post-manufacturing alteration).
</li></ol>

====14.2.1.6. Filter Fabric====

<ol>
<li>Filter fabrics that are not factory-bonded to a drainage layer must be
<ol>
<li>acceptable to the ''manufacturer'',
<li>suitable for the installed ''system covering'',
<li>selected for their ability to support dead loads, live loads, and point loads, and
<li>capable of permitting the anticipated flow rate of water.
</li></ol>
<li>Fabric filter mats must be
<ol>
<li>water permeable and have proven long term weather resistance, and
<li>strong enough to withstand traffic abuse and prevent displacement of insulation boards under flotation conditions.
</li></ol>
</li></ol>

====14.2.1.7. Decorative Stone (Aggregate Rock) Covering====

<ol>
<li>Decorative stone (aggregate rock) (See [[Notes to GLW Standard#A-14.1.3.10. | Note A-14.1.3.10.]]) must be washed and may be smooth or crushed.
<li>Large grade stone may withstand wind scour more effectively than smaller stone, but the ''Design Authority'' must determine the gradients, based on the ''specified wind loads'' for the ''waterproofing assembly'' (See also Article 3.2.2.3. Stone (Gravel) Ballast in the related waterproofing roof Standard).
</li></ol>

====14.2.1.8. Pavers and Pedestals====

<ol>
<li>Pavers that are partially supported (i.e., with pedestals) must be capable of resisting anticipated loads.
<li>Pedestals
<ol>
<li>must provide airflow for drying surfaces and assist in leveling,
<li>must be purpose-made and include an integral spacer rib no more than 4.76 mm (1/8”) wide, to uniformly separate pavers,
<li>should not impede the flow of water or air,
<li>should uniformly distribute the dead load of pavers and predicted live loads, and
<li>should be adjustable when a level surface is required, and
</li></ol>
</li></ol>

==Section 14.3. Application==
===14.3.1. Guarantee Term Requirements===
====14.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====14.3.1.2. Reserved====

===14.3.2. All Systems===
====14.3.2.1. Membranes and Membrane Protection====

<ol>
<li>Membranes and membrane flashing must be installed in keeping with the requirements found elsewhere in this Standard.
<li>Protection of waterproofing membranes from mechanical damage caused by tools, accident or the work of others is mandatory during the installation and maintenance of any ''system covering'' or living space (See also [[#9.1.3.4. Membrane Protection | Article 9.1.3.4. Membrane Protection]], for related requirements).
</li></ol>

====14.3.2.2. Filter Fabric====

<ol>
<li>Fabric filter rolls must be
<ol>
<li>at least 2489.2 mm (98") wide,
<li>installed loose-laid (un-bonded) over the insulation and below any type of ballast or ''system covering'',
<li>overlapped at all edges a minimum of 304.8 mm (12"),
<li>slit to fit over penetrations,
<li>cut out around ''drains'' and other openings,
<li>carried up all vertical transitions (including penetration flashings) above the ''finished system surface'' at least 76.2 mm (3”),
<li>loosely held in place behind metal counterflashings or ''wall'' finishes, at all perimeter edges and curbs, and
<li>secured around penetration flashings.
</li></ol>
</li></ol>

====14.3.2.3. Drainage====

<ol>
<li>The location of the drainage layer(s) shall conform to the requirements in [[#Part 7 | Part 7]].
<li>A second drainage layer may be installed above the insulation, but this is at the discretion of the ''Design Authority''.
<li>Specialized proprietary drainage products must be acceptable to the ''manufacturer''.
</li></ol>

====14.3.2.4. Decorative Stone (Aggregate Rock) Covering====

<ol>
<li>When decorative stone (aggregate rock) is specified as a ''system covering'', only washed stone may be used.
<li>Ballast guards must be installed around all ''drains'' (See [[#11.3.2.3. Drain Protection Against Blockage | Article 11.3.2.3.]]).
<li>Crushed stone specified as a ''system covering'' must be
<ol>
<li>installed over a geotextile protection layer, or its equivalent, when the stone is crushed or smaller than 12.7 mm (1/2”) in diameter, and
<li>must be applied with sufficient volume to hold down the protection layer against displacement by wind.
</li></ol>
</li></ol>

====14.3.2.5. Wearing Surfaces====

<ol>
<li>Pavers on pedestals promote free subsurface drainage at the membrane level and are therefore strongly recommended whenever practical.
<li>Pavers and unit-type masonry, such as brick or stone, must be supported by
<ol>
<li>proprietary (purpose-made) pedestals with at least a 4.76 mm (1/8”) integral spacer ribs for uniform spacing of pavers,
<li>a proprietary drainage layer overlaid with a filter fabric mat, or
<li>a drainage layer of loose aggregate (such as pea gravel) measuring at least 25.4 mm (1") in depth, installed over a filter fabric.
</li></ol>
<li>Pedestals, or a drainage layer,
<ol>
<li>shall be installed above the filtration layer, which may be laid over a membrane protection layer (in an uninsulated system) or over XPS insulation,
<li>must permit at least 12.7 mm (1/2″) of vertical separation between the paver and the underlying substrate, to provide airflow for drying surfaces and assist in leveling, and
<li>should not impede the flow of water or air, and should uniformly distribute the dead load of pavers, and other unit masonry products, as well as predicted live loads.
</li></ol>
<li>Pedestals shall be installed above the filtration layer, which may be laid over a membrane protection layer (in an uninsulated system) or over XPS insulation.
<li>Cast-in-place concrete installed directly above the roof membrane must be separated from the membrane and its protection layers with material and a filter fabric or barrier material specified by the ''Design Authority'' and conforming to the requirements in [[#14.1.3.11. Wearing Surfaces | Article 14.1.3.11.]]
</li></ol>

====14.3.2.6. Reserved====

====14.3.2.7. Structures and Equipment====

<ol>
<li>Structures must conform to the requirements in [[#14.1.3.13. Structures and Equipment | Article 14.1.3.13.]]; structures that do not conform must be reviewed with the ''Design Authority'' before waterproofing.
<li>Pre‐curbs (Figure 14.3.2.7.-A) must
<ol>
<li>achieve a finished height at least 101.6 mm (4") above the drainage plane of the highest adjacent waterproofing assembly (For an example of this see Construction Detail "Structural Planter"), and
<li>be completely enveloped with fully adhered acceptable sheet or liquid membrane flashing (including all faces of drainage knock‐outs).
</li></ol>
<li>All planters and water features must be fully waterproofed on the inside; sheet membrane installation must conform to the requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]], and liquid membrane flashing shall conform to the requirements in [[#10.3.3.4. Liquid Membrane Flashing | Article 10.3.3.4.]]
<li>All membrane flashing shall terminate
<ol>
<li>on the outside face of the planter wall, at least 50.8 mm (2”) below the upper edge, or
<li>on the inside face of the planter wall with a cut reglet ''linear metal flashing'', caulked with sealant and installed no less than 50.8 mm (2”) above the top surface of growing media.
</li></ol>
<li>Structural installations that do not incorporate pre-curbs must be fully enveloped with membrane, which shall be installed to conform to Article 10.3.2.3.
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 14.3.2.7.-A Pre-curbs and Sheet Membrane Flashing''' || 2025-October-25 }} {{hilite | Forming Part of Article 14.3.2.7. || 2025-October-25 }} (Click to expand illustration)
|-
| [[File:SBS Figure 14.3.1.jpg|link=http://rpm.rcabc.org/images/5/5b/SBS_Figure_14.3.1.jpg | 450 px]]
|}

<li>Dowels (reinforcement bar) should be
<ol>
<li>inserted into the pre‐curb after application of sheet membrane flashing, and
<li>waterproofed in their final position, where they penetrate the pre-curb.
</li></ol>
<li>When dowels are installed prior to the application of sheet membrane flashing, membrane flashing must be applied over the ''curb'' and around the dowels, and the dowels shall be waterproofed with an RGC-accepted, reinforced 2-component liquid membrane flashing system.
<li>Dowels must be waterproofed with
<ol>
<li>a single application of an RGC-accepted reinforced 2-component liquid membrane flashing, or
<li>two (2) applications of a single-component liquid membrane flashing,
<ol>
<li>applied to properly prepared surfaces,
<li>fully cured between coats,
<li>in keeping with the application requirements in [[#10.3.3.4. Liquid Membrane Flashing | Article 10.3.3.4.]], for 2-component reinforced liquid membrane flashing, or the manufacturer’s instructions, when using a single-component liquid membrane flashing, and
<li>applied no less than 50.8 mm (2”) on vertical surfaces and in a radius around the base of each dowel.
</li></ol>
</li></ol>
<li>When structures or equipment exceed the limits stated in [[Guarantee#3.2.1.6. Removal and Reinstatement of Overburden | Division A, Article 3.2.1.6. Removal and Reinstatement of Overburden]], a membrane integrity scan and any resulting repairs must be undertaken before the membrane is covered.
</li></ol>

<hr>
<div id=NOTES></div>

=[[Notes to SBS Standard | Notes to Standard]]=

</div>
</div>
<div class="col-md-12">

[[RCABC Roofing Practices Manual| Home]]
</div>

{{Template:RPM Page Footer with Copyright and Current Date}}

(Draft) Notes to GLW Standard

2026-06-19T22:00:22Z

James Klassen: /* Notes to Part 5 */

(Draft) Notes to GLW Standard

2026-06-19T21:54:17Z

James Klassen: /* Notes to Part 3 */

(Draft) Notes to GLW Standard

2026-06-19T21:48:34Z

James Klassen: /* Notes to Part 2 */

(Draft) RGC Standard for Grade-level Waterproofing Systems

2026-06-19T21:45:09Z

James Klassen: /* 2.1.3.1. General Requirements for Roof Slope */

__NONUMBEREDHEADINGS__
<div class="row">

{{DISPLAYTITLE:{{FULLPAGENAME}}}}
<div class="row">

<div class="col-md-3" style="float:right;" id="tocDiv">
<div class="noautonum">__TOC__</div>
</div> 

<div class="col-md-9" id="mainBodyDiv">

<big><big>Division B - Standards</big></big> 
<big>Other Waterproofing Systems</big> 

<hr>
<big><big><big><big><big><big>RGC Standard for Grade-level Waterproofing Systems</big></big></big></big></big></big>
<div class="panel panel-primary">
<div class="panel-heading"><big>'''About the Standard'''</big></div>
<div class="panel-body">
This Standard is a consolidation of requirements previously published in the Roofing Practices Manual for all waterproofing systems applied to structural decks at or touching grade. It is comprised of fourteen (14) Parts that contain the requirements, guiding principles, recommendations, and informative materials necessary for a roof to qualify for a '''''RoofStar 5-Year Guarantee''''' or '''''RoofStar 10-Year Guarantee'''''.

Notes to the Standard are hyperlinked from each Part and can be read by using the link in the Table of Contents for the Standard. Highlighted text within the body of the Standard indicates revisions made within the last twelve (12) months.

This Standard follows a specific structure, incorporates defined terms, and utilizes coloured text to denote specific meaning; this is explained in [[Structure_and_Organization_of_RPM_and_Standards | Division A, Part 2, "Structure and Organization of RPM and Standards"]]. When the requirements in this Standard conflict with other resources found either in this Manual or in ''manufacturer's'' published instructions, the rules for Authority and Conflict in [[Structure_and_Organization_of_RPM_and_Standards#2.3.1.2._Authority_and_Conflict | Division A, Article 2.3.1.2.]] shall be applied.

Readers are advised to review relevant materials that can be accessed through the hyperlinks embedded in the body of text.

<div class="col-md-12">
</div>
<hr>
<div class="col-md-4">
</div>
<div class="col-md-4">

:::{|
|-
! <div style="text-align:center;"><big><big>Table of Contents</big></big></div>
|-
| [[#PART_1 | Part 1 - General]]
|-
| [[#PART_2 | Part 2 - Supporting Structures: Decks and Walls]]
|-
| [[#PART_3 | Part 3 - Securing the Waterproofing Assembly]]
|-
| [[#PART_4 | Part 4 - Materials]]
|-
| [[#PART_5 | Part 5 - Deck and Wall Overlays]]
|-
| [[#PART_6 | Part 6 - Air and Vapour Controls]]
|-
| [[#PART_7 | Part 7 - Insulation]]
|-
| [[#PART_8 | Part 8 - Reserved]]
|-
| [[#PART_9 | Part 9 - Membrane System Field]]
|-
| [[#PART_10 | Part 10 - Perimeters and Walls]]
|-
| [[#PART_11 | Part 11 - Drainage]]
|-
| [[#PART_12 | Part 12 - Penetrations and Curbs]]
|-
| [[#PART_13 | Part 13 - Linear Metal Flashing]]
|-
| [[#PART_14 | Part 14 - Planters and Other Structures]]
|-
| <hr>
|-
| [[Notes to GLW Standard | Notes to Standard]]
|-
|}

</div>
<div class="col-md-12">
<hr>
<div style="text-align:center">
'''First Edition''': January 1, 2010
 '''Previous Edition''': April 5, 2024
 '''Current Edition''': Adopted June 11, 2026
 
All changes to this Standard are effective <big>'''July 1, 2026'''</big>
</div>
<div style="text-align:center">
{{Template:RPM Page Footer with Copyright and Current Date}}
</div>
</div>
</div>
</div>
<div id=PREFACE></div>
=Preface=
In 2010, the RCABC Guarantee Corp. (RGC) launched the RoofStar Guarantee for Waterproofing Systems and its supporting Standard, “Waterproofing Systems – Plazas, Promenades and Terraces”. Today, we call it the RGC Standard for Grade-level Waterproofing Systems. This Standard was substantially revised and adopted June 11, 2026 to align its structure and much of its content with the roofing Standards published in the RCABC Roofing Practices Manual. Although much of the content in this Standard applies to all waterproofing systems, regardless of membrane type, the reader will occasionally find links to membrane-specific content published in the related ''waterproofing roof'' Standards.

Waterproofing is a broad term that means sealing a surface or assembly so that water cannot pass into or through it. Unlike systems that shed water (for example, a metal or asphalt shingle roofs), waterproofing does not depend on gravity. Instead, it is accomplished with materials and methods that resist the transmission of water, even water that accumulates depth and is left standing on the waterproofed surface. However, there are some differences between waterproofing a roof and waterproofing on structural ''decks'' at grade.

Often, structural ''decks'' constructed at grade are not built with slope to drains, and because waterproofing assemblies are not insulated below the membrane, they do not utilize sloped insulation to move water to drains and a drainage system. Hydrostatic pressure is therefore more of a concern than it might be on many roofs (water exerts a pressure of 1000 Kg/m2 per metre of depth, or 62.2 lbs/ft2 per foot of depth). For that reason, only fully adhered membranes are permitted on these assemblies, the membranes are generally thicker than those that can be installed on a roof, the assemblies may be only uninsulated or “protected” (insulated above the membrane), and membrane reinforcement may be restricted to maximize flexibility while minimizing puncture resistance.

Structural concrete slabs at grade are also used differently from roofs. Often, these surfaces are leveraged by the general contractor and other trades for loading and staging materials, running equipment, and processing or fabricating building components. Because these platforms are suspended over occupied space or parking garages, the membranes installed on these ''decks'' must be tough, reliable, and protected, able to withstand abuse and damage. The methods used to install and seal them also must be rigorous. Membranes used in this kind of waterproofing must also be tested for watertightness and, when they are covered by permanent wearing courses, which can be expensive to remove if a leak occurs (for example, patios and gardens around the front entrance of a condominium tower), they must be guarded by an electronic leak detection (ELD) system. In some instances, the use of ELD is a requirement of this Guarantee.

Waterproofing is accomplished with single or multi-ply membrane systems RGC in membranes that are manufactured in various forms – as sheet goods (often packaged and delivered to site in rolls), or as liquid-applied systems, reinforced with a fabric (often polyester).

This Standard is limited to assemblies that are generally for pedestrian access, with limited access by emergency vehicles. It is also limited to structural slabs that touch grade; fully elevated podium ''decks'' are governed by the RGC waterproofing roof Standards. For that reason, a '''''RoofStar Guarantee for Grade-level Waterproofing''''' is not available for parking surfaces, driveways, or foundation walls below grade.

Within the scope of this Standard, much is possible and permissible. However, not everything permissible is necessarily advisable; good judgement must be exercised at the design stage to ensure a ''project’s'' success, and good judgement reaches well beyond what this Standard can address.

As a fully integrated document, every Part of this Standard contains critical requirements that sometimes overlap requirements in other Parts. While numerous requirements are linked internally to related Articles throughout the Standard, not every relationship between requirements is made in this fashion. Therefore, the reader must become familiar with the Standard in its entirety.

- RCABC Technical Services

<div id=PART_1></div>
=Part 1 - General=
==Section 1.1. Design==
===1.1.1. General===
====1.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
<li>In addition to the Scope described in Division A, this Standard applies to the design and construction of new or replacement waterproofing assemblies strictly intended for pedestrian traffic and limited emergency vehicle access strictly (See [[#1.1.1.2. Coverage and Limitations | Article 1.1.1.2.]] for limitations of coverage).
</li></ol>

====1.1.1.2. Coverage and Limitations====

<ol>
<li>Coverage under the '''''RoofStar™ Guarantee''''' shall be as described in Division A, [[Guarantee#3.2.1.1._Guarantee_Terms_and_Coverage | Article 3.2.1.1.]] and [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Article 3.2.1.2.]]
<li>A '''''RoofStar Guarantee''''' for ''waterproofing assemblies'' covers only ''waterproofing systems'' installed on structural ''decks'' that touch grade (the ground), that are strictly intended for pedestrian traffic (plazas, promenades, and terraces) and limited emergency vehicle access; ''waterproofing systems'' applied to or installed on vehicle parking ''decks'' and driveways, below-grade walls, foundations and footings, and repairs or renovations to in-service ''waterproofing systems'', do not qualify for a '''''RoofStar Guarantee''''' for ''waterproofing assemblies''.
</li></ol>

====1.1.1.3. References====

<ol>
<li>In this Standard, all references to
<ol>
<li>the "British Columbia Building Code" (the "Building Code", or the "Code"), to municipal or regional building codes or regulations, or to other standards, presume the current edition that is in force,
<li>materials mean those materials expressly accepted by the '''''Guarantor''''', unless stated otherwise, and
<li>measurements are shown in metric units first, followed by Imperial values (typically in parentheses; see [[Structure_and_Organization_of_RPM_and_Standards#2.1.3.2._Measurements | Division A, Article 2.1.3.2., "Measurements"]]).
</li></ol>
</li></ol>

====1.1.1.4. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part and the Standard:
<ol>
<li>''Design Authority'' means the individual or firm responsible for the issuance of ''project'' specifications and details to which the ''project'' will be bid and constructed. When a ''Contractor'' designs a ''project'', the ''Contractor'' is deemed to be the ''Design Authority''.
<li>''Finished system surface'' means the top surface of any waterproofing or water-shedding system, inclusive of ballast or ''overburden''.
<li>''Grade-level waterproofing system'' means an insulated or uninsulated ''system'', designed and constructed at grade with a sheet or liquid-applied membrane, to exclude water.
<li>''Guarantor'' (used interchangeably with '''''RGC''''') means the '''RCABC Guarantee Corporation''', which offers the '''''RoofStar Guarantee'''''.
<li> ''Linear metal flashing'' means flashings cut and shaped from flat metal stock, to redirect water at roof perimeters and edges, or to control the flow of water in valleys and drainage spillways. ''Linear metal flashings'' also protect roof membranes from weathering and damage and provide an aesthetic finish to the ''waterproofing system'' or ''water-shedding system''.
<li>''Membrane system'' means the combination of field and flashing membranes which function together to waterproof underlying materials and ''systems''.
<li>''Observer'' means a firm or person paid by the building Owner (directly, or through the '''''RGC'''''), who is independent (not a member) of the RCABC, and who is accepted by the '''''RGC''''' to provide Quality Assurance reviews during construction and after completion of the ''project'', according to the terms and conditions set out in RCABC policy.
<li>''Qualified roof condition surveyor'' means a person trained and competent in the use and interpretation of infrared thermographic and electronic moisture scanning equipment, used in the condition assessment of a ''waterproofing system'' or ''water-shedding system''.
<li>''Waterproofing system'' means a sealed, functional arrangement of ''primary materials'' constructed on roofs, plaza ''decks'', or on grade-level slabs (with or without insulation and other related materials), to resist the transmission of liquid water through the system, including water under hydrostatic pressure.
</li></ol>
</li></ol>

====1.1.1.5. Undefined Terms====

<ol>
<li>The following undefined terms are used throughout this Standard and are not formatted differently from the body of text:
<ol>
<li>Grade-level slab is a term that commonly refers to a structural deck conforming to the requirements in [[#2.1.5. Roof Decks | Subsection 2.1.5.]], that directly touches ground (grade) and covers spaces below.
<li>Podium deck is a term that commonly refers to a structural ''deck'' that aligns with [[#2.1.5. Roof Decks | Subsection 2.1.5.]], that touches grade, covers spaces below, supports structures and occupied spaces above it, and is generally limited to pedestrian access and occasional emergency vehicles or seasonal maintenance equipment.
<li>Wearing course is a term that commonly means a hard surface that is installed above the ''waterproofing system'' to resist abrasion and compaction from pedestrian and occasional vehicular traffic; it can be a removable material (“accessible” wearing course, such as pavers), or permanent (“inaccessible”, e.g., a concrete slab poured on top of the ''waterproofing system''.
</ol></li>
</ol></li>

====1.1.1.6. Objectives====

<ol>
<li>Every ''waterproofing system'' shall conform to the more stringent of this Standard or the Building Code or By-law having jurisdiction.
</li></ol>

====1.1.1.7. Responsibility for Design====

<ol>
<li>Each design of a ''waterproofing assembly'' shall be undertaken by a person or persons qualified in the work concerned (See [[#3.1.3.1. Responsibility for Design | Article 3.1.3.1.]] with respect to the securement of the ''roof assembly'').
<li>The ''Coordinating Registered Professional'' is responsible for ensuring the design of the ''vegetated roof assembly'' complies with all applicable building, energy, and fire codes having jurisdiction.
</li></ol>

====1.1.1.8. Pre-Design Requirements====
<ol>
<li>The ''Coordinating Registered Professional'' is responsible to ensure that the design of a ''waterproofing assembly'' is a multi-disciplinary enterprise that aligns with the designs for structural, plumbing, mechanical, electrical, architectural, and building envelope, together with all trades whose work intersects with the ''Contractor’s'' scope of work, to minimize out-of-sequence operations that could compromise the integrity of the completed ''waterproofing assembly''.
</li></ol>

====1.1.1.9. Suitability of Design====
<ol>
<li>The ''Design Authority'' is responsible for determining the appropriate ''waterproofing system'' design and must consider (without limitation)
<ol>
<li>the requirements of the building code having jurisdiction,
<li>the structural capabilities or limitations of the building,
<li>fire resistance and class requirements for the building,
<li>wind loads (See [[#Part 3 - Securing the Roof Assembly | Part 3]] of this Standard),
<li>the effects of nearby structures on the ''waterproofing assembly'',
<li>the potential effects of reflected heat on the ''waterproofing assembly'',
<li>''waterproofing system'' aesthetics, and
<li>maintenance requirements, including the safety of maintenance workers.
</li></ol>
</li></ol>

===1.1.2. Guarantee Requirements===
====1.1.2.1. RoofStar 5-Year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
<li>In addition to Sentence (1), all ''projects'' shall comply with
<ol>
<li>the ''project'' specifications and drawings, and
<li>the ''manufacturer's'' published installation requirements.
</li></ol>
</li></ol>

====1.1.2.2. Reserved====

====1.1.2.3. Quality Control====

<ol>
<li>Notwithstanding any other requirements in this Standard, the ''Contractor'' shall
<ol>
<li>bid the ''project'' to meet the more stringent of this Standard or the ''project'' specifications,
<li>bid the ''project'' to include only RGC-accepted systems and materials,
<li>ensure that the supporting ''waterproofing assembly'' conforms to the requirements and limitations of [[#1.1.3.1. Permitted Roof Systems | Article 1.1.3.1.]],
<li>notify the ''Observer'' at least 24 hours before construction is scheduled to start or resume (72 hours notice is required for ''projects'' further than 100 km from the nearest "Free Zone" city location), and then daily, before work resumes,
<li>ensure that construction conforms to this Standard and exhibits good workmanship,
<li>ensure that samples, reports, shop drawings, ELD arrangements, certificates, manufacturer approvals, warranty documentation, and all other submittals are collected and provided to the '''''Guarantor''''' as required in [[#1.3.2.4. Contractor Submittals | Article 1.3.2.4.]], and
<li>abide by all pertinent RCABC policies.
</li></ol>
</li></ol>

====1.1.2.4. Quality Assurance====
(See [[Notes to GLW Standard#A-1.1.2.4. Quality Assurance | Note A-1.1.2.4.]])

<ol>
<li>Notwithstanding any other requirements in this Standard, the ''Observer'' shall
<ol>
<li>verify that the materials used in construction are accepted by the '''''Guarantor''''' and listed in [[Division C | Division C]] of this ''Manual'',
<li>review the construction of the ''waterproofing system'' (according to the prescribed number of observations, with consideration for the expected duration of construction) for conformance with the more stringent of
<ol>
<li>this Standard,
<li>conditions and limitations in [[Division A | Division A]] of the RPM, as they apply,
<li>the ''manufacturer’s'' published requirements,
<li>the ''project'' drawings and specifications, or
<li>the Building Code having jurisdiction.
</li></ol>
<li>review and report whether the ''Contractor'' has met the RCABC policy requirements noted in this Standard, and
<li>perform cut tests or other acceptable methods, whenever required, to verify that the materials and methods of construction conform to this Standard (for example, this may be required when the ''Contractor'' has completed more than 30 squares of waterproofing without an observation).
</li></ol>
</li></ol>

===1.1.3. All Systems===
====1.1.3.1. Permitted Waterproofing Systems====
(See [[Notes to GLW Standard#A-1.1.3.1. Permitted Waterproofing Systems | Note A-1.1.3.1.]])

<ol>
<li>This Standard applies only to uninsulated or protected ''waterproofing systems'' installed on structural ''decks'' that touch grade; repairs or renovations to in-service ''waterproofing systems'' do not qualify for a '''''RoofStar Guarantee'''''.
</li></ol>

====1.1.3.2. Accessibility for Maintenance====

<ol>
<li>Each ''waterproofing assembly'' should be designed to provide safe access for maintenance of roof drains, corners, or mechanical equipment, where the roof is at least 3 m (10’) above the surface of the ground, or where a hazard to a person exists, should a fall be possible (this principle also applies to roof areas intended for regular occupancy); design elements to mitigate fall hazards should align with the Code having jurisdiction, and with the ''Workers Compensation Act Regulations'', and should include
<ol>
<li>tall parapets,
<li>guardrails, or
<li>tie-off anchors.
</li></ol>
</li></ol>

====1.1.3.3. Membrane Integrity Testing====
(See [[Notes to GLW Standard#A-1.1.3.3. Membrane Integrity Scans | Note A-1.1.3.3.]] and '''Figure 1.1.3.3.-A''')

<ol>
<li>Electrical current membrane integrity testing shall conform to
<ol>
<li>ASTM D7877, "Standard Guide for Electronic Methods for Detecting and Locating Leaks in Waterproof Membranes", or
<li>ASTM D8231, "Standard Practice for the Use of Low Voltage Electronic Scanning System for Detecting and Locating Breaches in Roofing and Waterproofing Membranes."
</li></ol>
<li>An electrical current membrane integrity test is required when anyone other than the ''Contractor'' installs ''overburden'', amenities, or equipment, prior to the installation of any overburden or wearing course (In this Standard, the term "electrical current membrane integrity test" means a test method that uses electrical current and electronic sensing technology to detect breaches in the membrane ''system'').
<li>An electrical current membrane integrity test is required when the ''Contractor'' installs ''overburden'', amenities, or equipment, but only when
<ol>
<li>the total ''project'' area (footprint), inclusive of planters or other waterproofed features, exceeds 18.58 m2 (200 sf), and
<li>''overburden'', amenities, or equipment exceed 152.4 mm (6”) in depth
</li></ol>

<li>An electrical current membrane integrity test must be performed by an RGC-recognized service provider listed in [[Division_C | Division C]].
<li>If flood testing is specified, it shall be conducted prior to the installation of insulation and roof coverings, and must be executed in keeping with ASTM D5957, "Standard Guide for Flood Testing Horizontal Waterproofing Installations".
</li></ol>
</li></ol>
 
::{|
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 1.1.3.3.-A Electronic Integrity Testing''' Forming Part of Article 1.1.3.3. (Click to expand illustration)
|-
| [[File:Figure 1.1.3.3.-A.jpg |link=https://rpm.rcabc.org/images/2/2a/Figure_1.1.3.3.-A.jpg | 800 px]]
|}

====1.1.3.4. Electronic Leak Detection====
(See [[Notes to GLW Standard#A-1.1.3.4. Electronic Leak Detection| Note A-1.1.3.4.]])

<ol>
<li>Electronic Leak Detection (ELD) shall conform to
<ol>
<li>ASTM D7877, "Standard Guide for Electronic Methods for Detecting and Locating Leaks in Waterproof Membranes", or
<li>ASTM D8231, "Standard Practice for the Use of Low Voltage Electronic Scanning System for Detecting and Locating Breaches in Roofing and Waterproofing Membranes."
</li></ol>
<li>Electronic Leak Detection (ELD)
<ol>
<li>is required for all ''waterproofing assemblies'' that are covered with inaccessible ''overburden'',
<li>is strongly recommended for ''waterproofing assemblies'' with accessible ''overburden'',
<li>shall provide detection capabilities for all waterproofing surfaces, and
<li>must extend at least 50.8 mm (2") vertically from the ''drainage plane'' at
<ol>
<li>all transitions,
<li>any point along the entire deck perimeter, and
<li>protrusions.
</li></ol>
</li></ol>
<li>Where the electronic leak detection system utilizes a sensor ribbon (tape) installed on the waterproofing membrane in a grid pattern, the ribbon spacing shall be no more than three (3) metres, measured in any direction, irrespective of the type or depth of ''overburden.''
</li></ol>

====1.1.3.5. Hot Works====

(See [[Notes to GLW Standard#A-1.1.3.5. Hot Works| Note A-1.1.3.5.]])

<ol>
<li>The ''Design Authority'' may specify that the ''Contractor'' must maintain compliance with the RCABC Hot Works Program and consequently manage the Hot Works conducted on site (See [[#1.3.2.1. Hot Works: Contractor Requirements | Article 1.3.2.1.]]).
<li>When the ''project'' involves Hot Work, the ''Design Authority'' must either
<ol>
<li>pre-approve alternate applications already written in this Standard or another applicable Standard published in this ''Manual'', when the specified application is deemed to be fire-sensitive by the ''Contractor'' as part of the risk assessment process, or
<li>provide alternate material and application requirements in the Specification for fire sensitive locations on the ''project''.
</li></ol>
</li></ol>

====1.1.3.6. Variances====

<ol>
<li>When a design is unable to conform to the Standard, the ''Design Authority'' may apply to the RGC for a written Variance.
<li>Application for a written Variance must be made in writing (email correspondence is common), and must
<ol>
<li>identify the ''project'' name and its civic address,
<li>identify the '''''RoofStar Guarantee''''' number (if assigned),
<li>identify the ''Contractor'' (if awarded),
<li>articulate the nature of the design problem,
<li>identify the '''''RoofStar Guarantee''''' requirement to be varied, and state the desired modification (i.e., reduce the requirement for 203.2 mm (8") to 152.4 mm (6")),
<li>cite the reference to which the Variance will apply (i.e., Standard name, article number, sentence number, etc.), and
<li>provide design drawings, photographs, and ''project'' plans, referencing grid lines that identify or articulate the boundaries to which the Variance will be applied.
</li></ol>
<li>Variances are issued by the '''''RGC''''' only to the ''Design Authority'' and will be distributed to the ''Contractor''.
<li>The '''''Guarantor''''' reserves all rights to vary a requirement in a Standard without restrictions, to limit coverage on any part or the whole of a ''project'', or to impose design or construction conditions on a ''project''.
<li>Variances are issued only for the ''project''-specific issue identified in the written request, and do not constitute general permission to depart from the published requirements in this Standard, for any aspect of the same ''project'' or for future ''projects'', designed or constructed by any other firm.
</li></ol>

===1.1.4. Replacement and Alterations===

(The requirements in [[#1.1.3. All Systems | Subsection 1.1.3., "All Systems"]], shall be read together with the following Articles)
(See [[Notes to SBS Standard#A-1.1.4. Alterations and Additions | Note A-1.1.4.]])

====1.1.4.1. General Requirements====

<ol>
<li>Unless expressly permitted otherwise in this Standard, the design for replacement ''waterproofing systems'' shall conform to the requirements for new waterproofing in this Standard.
</li></ol>

====1.1.4.2. Complete Waterproofing System Replacement====

<ol>
<li>Complete ''waterproofing system'' replacement shall conform to the general requirements in [[#1.1.4.1. General Requirements | Article 1.1.4.1.]], unless expressly varied elsewhere in this Standard.
<li>''Waterproofing system'' replacement means the complete removal of membranes, insulation, drainage boards, filtration materials, and metal flashings, replacing them with only new materials.
<li>Where a ''waterproofing system'' ties into air and in-service ''control layers'' in adjacent ''wall'' assemblies, the decision to reuse and repair those ''control layers'' remains the responsibility of the ''Design Authority'' but shall nevertheless be subject to the requirements in [[#Part 6 - Air and Vapour Controls | Part 6, Air and Vapour Controls]] with respect to continuity.
<li>''Waterproofing system'' replacement ''projects'' are eligible to qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', subject to their respective requirements.
</li></ol>

====1.1.4.3. Partial Waterproofing System Replacement====

<ol>
<li>Partial replacement of a ''waterproofing system'' is permissible, but only when the waterproofing membrane and membrane flashing is replaced (other in-service materials may be replaced or retained, as elected by the ''Design Authority''), but coverage under a '''''RoofStar Guarantee''''' is limited to new materials supplied and installed by the ''Contractor''.
<li>Retention of insulation materials in a ''waterproofing system'' is subject to the requirements for insulation in [[#Part 7 - Insulation | Part 7]].
<li>The reinstallation of all retained materials shall conform to this Standard, irrespective of how they were originally installed.

</li></ol>

====1.1.4.4. Membrane Recovering====
(See [[Notes to GLW Standard#A-1.1.4.4. Membrane Recovering | Note A-1.1.4.4.]])

<ol>
<li>Recovering (installing a new ''waterproofing system'' membrane over an in-service membrane system) is not a recommended practice and will limit the scope of coverage under the '''''RoofStar Guarantee'''''.
<li>A '''''RoofStar Guarantee''''' issued for a recovered ''waterproofing system'' membrane is limited strictly to the value of new ''waterproofing system'' materials; in-service materials left in place or reinstated are not covered by the '''''RoofStar Guarantee'''''.
<li>All membrane recovering ''project'' specifications and drawings shall reflect and conform to the construction requirements in [[#1.3.3.4. Membrane Recovering | Article 1.3.3.4.]]
<li>Recovering a ''waterproofing system'' membrane is acceptable to the Guarantor only when the following conditions have been satisfied, together with any other applicable requirements published in this Article or in [[#1.3.3.4. Membrane Recovering | Article 1.3.3.4.]]:
<ol>
<li>the in-service ''waterproofing system'' membrane has never before been recovered (recovering is not permitted over a previously recovered ''waterproofing system'' membrane),
<li>the in-service membrane is free of blisters, damage, seam failures, or breaches, and is still fully bonded to the deck,
<li>in-service or new waterproofing system components installed on top of the recovered membrane must conform to the usual design, material, and construction requirements of this Standard, including wind load requirements,
<li>the recovering specifications, plans, and detail drawings have been provided to, and reviewed by, the Guarantor prior to the tendering of the project,
<li>the Guarantor has issued a written Variance that expressly permits recovering and outlines the conditions and limitations under which recovering may proceed, and
<li>the Design Authority has satisfied the submittal requirements for recovering, in this Standard.
</li></ol>
<li>Before proceeding with roof recovering, the ''Design Authority'' should consider
<ol>
<li>the requirements for moisture testing (described below),
<li>testing securement of materials to be left in place, and
<li>the potential consequences of failure for the building and its use.
</li></ol>
<li>To qualify for a written Variance from the '''''Guarantor''''', the Variance request (See [[#1.1.3.6._Variances |Article 1.1.3.6.]])
<ol>
<li>must identify the type of ''waterproofing system'' to which the Variance pertains (i.e., ''uninsulated'' or ''protected waterproofing system''),
<li>must specify how the in-service ''waterproofing system'' will be physically separated from other roof areas, and
<li>must include the formal independent report that describes the condition of the in-service ''waterproofing system'', and which documents results from cut tests and moisture investigation that are prerequisites for a '''''RoofStar Guarantee'''''.
</li></ol>
<li>In-service ''uninsulated'' and ''protected waterproofing systems'' presented to the '''''Guarantor''''' in a written Variance application by the ''Design Authority'' must be free of blisters and breaches in the membrane.
</li></ol>

====1.1.4.5. Tie-ins, Additions, and Alterations to Existing Waterproofing====

<ol>
<li>When a new ''waterproofing system'' adjoins an in-service ''waterproofing system'' and structural movement between the two is anticipated, an ''expansion joint'' must be used to tie the new system to the in-service system.
<li>If ''project'' conditions do not allow for a ''curb'' joint between new and in-service ''waterproofing systems'', the ''Design Authority'' must submit an alternative design and obtain a written Variance from the '''''Guarantor''''' that permits the elimination of curb joints (see [[#1.1.3.6. Variances | Article 1.1.3.6. Variances]]); any alternative design
<ol>
<li>must include design specifications and construction details showing a positive water cut-off that fully isolates the in-service ''waterproofing system'' from the new ''waterproofing system'', and
<li>shall show how the new ''waterproofing system'' will be easily distinguishable from the existing ''waterproofing system'', and
<li>may be made with the saw-cut method (see [[#1.3.3.5. Tie-ins, Additions, and Alterations to Existing Waterproofing | Article 1.3.3.5.]]), provided the connection between a new ''waterproofing system'' and an in-service ''waterproofing system'' will be free of structural movement.
</li></ol>
<li>Repairs or renovations to an existing ''waterproofing system'' that is not covered by a '''''RoofStar Guarantee''''' do not qualify for a '''''RoofStar Guarantee''''' (the term "renovation" means the removal and replacement of, or the application of a cover to, a portion of the ''waterproofing system'').
<li>Modifications or additions to a ''waterproofing system'' covered by an active '''''RoofStar Guarantee''''' are permissible, subject to various conditions, but must be made by a ''Contractor'' qualified to perform work under the '''''RoofStar Guarantee Program'''''.
</li></ol>

===1.1.5. Reserved===

==Section 1.2. Reserved==

==Section 1.3. Application==
===1.3.1. Reserved===
===1.3.2. All Systems===
====1.3.2.1. Hot Works: Contractor Requirements====

<ol>
<li>The ''Contractor'' must maintain the requirements of the RCABC Hot Works Program, including (without limitation)
<ol>
<li>'''Insurance Coverage''', wherein the limits carried on the ''Contractor’s'' policy must equal or exceed the minimum requirements set by RCABC, and coverage must be unhindered by warranties that limit or exclude coverage when Hot Works is required,
<li>'''Education and training''', since workers who perform Hot Works must be trained by the ''Contractor'' and kept current with acceptable methods,
<li>the [https://free.bcpublications.ca/civix/content/public/bcfc2018/?xsl=/templates/browse.xsl&xsl=/templates/browse.xsl "British Columbia Fire Code"], wherein a Fire Safety Plan, preventative methods or alternative work procedures, fire watches, and the use and placement of equipment at the ''project'' site must comply with the BC Fire Code requirements for Hot Work,
<li>a '''Fire Safety Plan''', whereby
<ol>
<li>the ''Contractor'' must assess the hazards to property and persons and produce a written Fire Safety Plan prior to the start of work, and
<li>the Fire Safety Plan must be kept on the ''project'' site and must be kept current until the ''project'' is completed,
</li></ol>
<li>'''RoofStar Guarantee Standards''', to which the ''Contractor'' must conform, at each juncture where the interface of different membranes applications constitutes part of the Fire Safety Plan,
<li>a '''Fire Watch''', in which the ''Contractor'' must, as part of the Fire Safety Plan, conduct a fire watch
<ol>
<li>that complies with the "British Columbia Fire Code",
<li>is assigned to competent, trained personnel using suitable equipment, including the use of a hand-held infrared thermometer, and
<li>is documented in a written fire watch log, and
</li></ol>
<li>'''Hot Works Notification''', wherein the ''Contractor'' shall notify the ''project'' authority or the AHJ, as and when required, that Hot Works will be performed.
</li></ol>
</li></ol>

====1.3.2.2. Workmanship====

(See [[Notes to GLW Standard#A-1.3.2.2. Workmanship | Note A-1.3.2.2.]])

<ol>
<li>The ''Contractor'' must take reasonable measures to protect the ''project'' from damage by the weather, during and at the completion of the ''project''.
<li>Open penetrations and flashings must be temporarily sealed off from the weather, even when other trades are responsible for making a permanent seal or installing overlapping materials (See [[#4.2.1.1. Use of Accepted Materials | Article 4.2.1.1.]]).
</li></ol>

====1.3.2.3. Contractor Qualifications====

<ol>
<li>Supervision and installation of a RoofStar-guaranteed ''waterproofing system'' may be conducted only by established employees of the ''Contractor'', and every ''project'' must be supervised by a Journeyperson employee who holds a valid ticket.
<li>A Journeyperson may supervise a maximum of three (3) apprentices and/or three (3) labourers (Ref. RCABC Policy A-248).
</li></ol>

====1.3.2.4. Contractor Submittals====

<ol>
<li>The ''Contractor'' shall submit to the '''''Guarantor''''', before a '''''RoofStar Guarantee''''' is issued, any and all required samples, reports, shop drawings, ELD arrangements, certificates, and ''manufacturer'' approvals.
</li></ol>

===1.3.3. Replacement and Alterations===
(The requirements in [[#1.3.2. All Systems | Subsection 1.3.2., "All Systems"]], shall be read together with the following Articles)

====1.3.3.1. General Requirements====

<ol>
<li>Unless expressly permitted otherwise in this Standard, all replacement waterproofing shall conform to the requirements for new waterproofing in this Standard.
</li></ol>

====1.3.3.2. Complete Grade-level Waterproofing System Replacement====

<ol>
<li>See the requirements throughout this Standard, which apply to both new construction and replacement of a waterproofing membrane.
</li></ol>

====1.3.3.3. Partial Grade-level Waterproofing System Replacement====

<ol>
<li>See the requirements throughout this Standard, which apply to both new construction and replacement of a waterproofing membrane.
</li></ol>

====1.3.3.4. Membrane Recovering====
(See [[#1.1.4.4. Membrane Recovering | Article 1.1.4.4.]])

<ol>
<li>Recovering shall not proceed unless permitted by a written Variance issued by the '''''Guarantor''''' prior to the tendering of the ''project''.
<li>All wet material identified by either the independent moisture detection survey or through cut tests shall be removed in the course of construction.
<li>When recovering any in-service ''project'' waterproofed with sheet membrane, the membrane must be
<ol>
<li>clean and free of debris, gravel, blisters, or damage, and
<li>cut through at the perimeter change in plane to relieve any tension or distortions in the membrane.
</li></ol>
<li>When recovering the membrane of a ''waterproofing system'', the means and methods shall conform to the requirements published in Article 1.3.3.4. of the roofing Standard for the permissible membrane.
<li>In-service built-up ''waterproofing systems'' (typically constructed with felt and asphalt) must be spudded clean of gravel, and any loose plies shall be removed.
<li>New membrane system materials must be properly secured to the underlying ''waterproofing assembly''.
<li>All membrane recovering projects must incorporate only new
<ol>
<li>strip-in flashings for penetrations (Ref. [[#Part 12 - Penetrations and Curbs |Part 12]]),
<li>''drains'' (cast-iron drains in usable condition are exempted from this requirement; see [[#11.3.3.2. General Requirements for Cast-iron Roof Drains | Article 11.3.3.2.]]), and
<li>''linear metal flashings'' (Ref. [[#Part 13 - Linear Metal Flashing |Part 13]]).
</li></ol>
</li></ol>

====1.3.3.5. Tie-ins, Additions, and Alterations to Existing Waterproofing====

<ol>
<li>Where a new ''waterproofing system'' adjoins and ties into an existing ''waterproofing system'', the two areas must be isolated and separated by a ''curb'' joint securely attached to the structure and waterproofed in keeping with the requirements for control joints ( [[#10.1.6.2. Control Joints (System Dividers) | Article 10.1.6.2.]] and [[#10.3.6.2. Control Joints (System Dividers) | Article 10.3.6.2.]]).
<li>If the ''Design Authority'' has obtained from the '''''Guarantor''''' a written Variance that permits the elimination of ''curb'' joints, the new ''waterproofing system'' must be fully isolated from the in-service ''waterproofing system'' with a positive water cut-off at the drainage plane:
<ol>
<li>the adjoining membranes must be compatible with each other and of the same membrane system type (e.g., Polymer-modified Bituminous Membranes),
<li>an authorized technical representative for the ''manufacturer'' of the new membrane must provide signed and dated written consent for this detail,
<li>the two areas must be isolated and separated from each other by a water cut-off as required below and illustrated in '''Figure 1.1.4.5.-A''':
<ol>
<li>a saw cut 12.7 mm (1/2”) wide and deep must be made in the new deck, at least 304.8 mm (12”) away from the adjacent ''waterproofing assembly'',
<li>the saw cut must be filled with a membrane-compatible mastic acceptable to the ''manufacturer'',
<li>new membranes should be installed in the same direction as the adjoining in-service membranes,
<li>the new base sheet must span the saw cut and extend past it by at least terminate no closer than 152.4 mm (6”) from the ''control joint'' securely attached to the structure and waterproofed in keeping with the requirements in both Article 10.1.6.2., "Control Joints (Roof Dividers)", and Part 10, "Perimeters and Walls" of the applicable membrane Standard for roofs, and
<li>the new ''waterproofing system'' must be easily distinguishable from the in-service system.
</li></ol>
</li></ol>
</li></ol>

====1.3.3.6. Repairs and Modifications====

<ol>
<li>When a ''waterproofing system'' that is covered by an active (unexpired) '''''RoofStar Guarantee''''' has been damaged or otherwise requires repairs, work shall conform to the specifications of the material manufacturers, and to the requirements in this Standard, with respect to (without limitation)
<ol>
<li>the securement of new materials ([[#Part 3 - Securing the Waterproofing Assembly | Part 3]]),
<li>deck or wall overlays ([[#Part 5 - Deck and Wall Overlays | Part 5]]),
<li>''continuity'' of air and vapour controls ([[#Part 6 - Air and Vapour Controls | Part 6]]),
<li>thermal resistance and insulation overlays ([[#Part 7 - Insulation | Part 7]] and [[#Part 8 - Insulation Overlays | Part 8]]),
<li>membranes ([[#Part 9 - Membrane System Field | Part 9]]),
<li>membrane flashing ([[#Part 10 - Perimeters and Walls | Part 10]]),
<li>drains ([[#Part 11 - Drainage | Part 11]]),
<li>penetrations and curbs ([[#Part 12 - Penetrations and Curbs | Part 12]]), and
<li>linear metal flashings ([[#Part 13 - Linear Metal Flashing | Part 13]]).
</li></ol>
<li>Modifications to an in-service ''waterproofing system'' covered by an active (unexpired) '''''RoofStar Guarantee''''', including (without limitation) the addition of new ''curbs'', ''drains'', or penetrations, shall conform to all the requirements in this Standard, or as otherwise stated.
</li></ol>

===1.3.4. Reserved===

<hr>
<div id=PART_2></div>

=Part 2 - Supporting Structures: Decks and Walls=
(See [[Notes to GLW Standard#A-2 | Note A-2]])

==Section 2.1. Design==
===2.1.1. General===
====2.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====2.1.1.2. Defined Terms====
(See '''Figure 2.1.1.2.-A''')

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Common Slope'' means a slope 1:3 (4” in 12”, or 18 degrees), up to and including 1:1 (12” in 12”, or 45 degrees).
<li>''Deck overlay'' means a panel material secured to the ''supporting deck'', to render the deck surface suitable for the installation of roofing materials.
<li>''Extreme Slope'' means a slope greater than 21:12 (21” in 12”, or 84 degrees).
<li>''Flat'' means a slope less than 1:6 (2” in 12”, or 9 degrees).
<li>''Low Slope'' means a roof with a slope 1:6 (2" in 12", or 9 degrees, up to but less than 1:3 (4” in 12”, or 18 degrees).
<li>''Sheathing'' means a rigid panel material secured directly onto framing.
<li>''Steep Slope'' means a slope greater than 1:1 (12” in 12”, or 45 degrees) up to and including 21:12 (21” in 12”, or 84 degrees).
<li>''Supporting deck'' ("deck"), as used in this Standard, means the "structural surface to which a ''waterproofing system'' is applied" (adapted from ''ASTM D1079-18 Standard Terminology Relating to Roofing and Waterproofing'').
<li>''Wall'' means a structural or non-structural element in a building that vertically separates space. ''Walls'' may separate the outside environment from the interior conditioned space of a building, or they may separate one or more interior spaces from each other (adapted from ASTM E631-15, "Standard Terminology of Building Constructions").
<li>''Wall overlay'' means a panel material secured to the surface of a ''wall'', to render it suitable for the installation of waterproofing or ''wall'' cladding materials.
</li></ol>
</li></ol>
 
:::{|
|-
| colspan="1"; style="text-align:center;width:500px;" | '''Figure 2.1.1.2.-A Roof Slope''' Forming Part of Article 2.1.1.2. (Click to expand illustration)
|-
| [[File:Figure 2.1.1.2.-A (Slopes).jpg|link=https://rpm.rcabc.org/images/4/4d/Figure_2.1.1.2.-A_%28Slopes%29.jpg| 600 px]]
|}

===2.1.2. Guarantee Term Requirements===
====2.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====2.1.2.2. Reserved====

===2.1.3. All Systems===
====2.1.3.1. General Requirements for Roof Slope====

<ol>
<li>The ''Design Authority'' must design the slope of a ''deck'' to achieve proper drainage and must take into consideration the anticipated deflection and settlement of the structure, which may interfere with drainage.
<li>While good drainage is desirable but not always perfectly achievable, and ''waterproofing systems'' generally are not affected by standing water, each ''project'' design should incorporate sufficient slope to move water off the ''waterproofing system'' surface.
<li>"Sufficient slope", which is subject to conditions that permit evaporation, shall mean that no standing water remains on the ''waterproofing system'' surface after a reasonable interval following a rainfall.
<li>''Deck'' slope should be increased beyond the minimums published in this Standard when local climate conditions, such as rainfall frequency or severity, result in ongoing or significant ponding conditions (see [[#2.1.3.2. Deck Slope for New Construction | Article 2.1.3.2.]] and [[#2.1.3.3. Slope for Replacement Roofing | Article 2.1.3.3.]] for minimum requirements).
<li>Drainage (slope toward plumbing ''drains'') should be achieved (in descending order of best practices) with
<ol>
<li>four-way slope to ''drain'',
<li>slope to a common valley, or to gutters, or
<li>positive sloping valleys to ''drains''.
</li></ol>
</li></ol>

====2.1.3.2. Deck Slope for New Construction====

<ol>
<li>All new construction waterproofing should be designed and built with a slope of no less than 2% (1/4” in 12”), measured on the primary sloped planes of the system, but positive slope off the ''deck'' or to drains is required.
<li>Where practicable, ''drains'' should be located mid-span on a ''deck'' between supporting columns or walls, especially when ''deck'' slopes are less than 1:50 (1/4” in 12”), to take advantage of ''deck'' deflections from future loads.
</li></ol>

====2.1.3.3. Slope for Replacement Waterproofing====

<ol>
<li>Replacement ''waterproofing systems'' may qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''' without correcting poor drainage, though the elimination of ponding (standing water) is strongly recommended.
</li></ol>

====2.1.3.4. Deck Condition and Suitability for Waterproofing====

<ol>
<li>The Code having jurisdiction prevails in all cases except where it is exceeded by the requirements published in this Standard.
<li>Notwithstanding the requirements in this Standard, the '''''RoofStar Guarantee''''' does not cover the ''supporting deck'' material or its attachment to the building structure, which is the responsibility of the ''Design Authority'' and the building contractor.
<li>The supporting ''deck'' must be dimensionally stable, resist deflection from dead and live loads, and must be capable of accommodating ''waterproofing system'' component movement.
<li>''Walls'', ''parapets'', ''curbs'', blocking, and penetrations should be constructed or placed by other trades prior to the commencement of waterproofing work.
</li></ol>

====2.1.3.5. Drainage Around Obstructions====

<ol>
<li>''Curbs'' that span 2438.4 mm (96") or more when measured perpendicular to roof slope, across the direction of drainage, should be designed with a cricket to divert water around the ''curb''.
</li></ol>

===2.1.4. Reserved===
===2.1.5. Structural Decks===
====2.1.5.1. Steel Roof Decks====
(See [[Notes to GLW Standard#A-2.1.5.1.| Note A-2.1.5.1.]]) (See also [[#Part 9 - Roof Field (Membrane Systems) | Part 9]] and [[#Part 10 - Perimeters and Walls | Part 10]] for substrate preparation requirements)

<ol>
<li>Although not as common as concrete, steel structural ''decks'' must be acceptable to the ''manufacturer'' and must conform to either
<ol>
<li>ASTM Standard Specification A653 / A653M, "Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process": Structural (Physical) Quality, minimum Grade 33, with a design thickness of 22-gauge (0.759 mm) or greater and a minimum zinc coating designation ''Z275'', or
<li>ASTM Standard Specification A792 / A792M, "Steel Sheet, Aluminum-Zinc Alloy-Coated by the Hot-Dip Process": General Requirements, minimum Grade 33, with a design thickness of 22-gauge (0.759 mm) or greater and a minimum aluminum-zinc alloy coating designation ''AZ150''.
</li></ol>
<li>Steel ''deck'' panels must be properly aligned, squarely intersect walls, and provide a smooth level surface for waterproofing.
<li>Steel ''decks'' that receive poured concrete overlays shall have vented pans to prevent entrapment of moisture; this work is by other trades.
</li></ol>

====2.1.5.2. Concrete Decks====
(See [[Notes to GLW Standard#A-2.1.5.2.| Note A-2.1.5.2.]])

<ol>
<li>Cast-in-place and precast concrete ''decks'' must cure for at least 28 days before receiving an adhered waterproofing membrane ("adhered", as it is used in this requirement, means fully or intermittently bonding any membrane to the ''deck'' with an adhesive, hot asphalt (bitumen), or heat), but this limitation may be reduced if
<ol>
<li>both the building envelope engineer and the ''manufacturer'' expressly permit membrane application within the first 28 days after pouring, and
<li>their respective signed letters of permission are furnished to the '''''Guarantor''''' forthwith, to be included with the ''project'' record.
</li></ol>
<li>Shotcrete-formed concrete decks are not an acceptable substrate for the application of sheet membranes.
</li></ol>

====2.1.5.3. Wood Decks====

<ol>
<li>Wood decks are not acceptable substrates for ''waterproofing systems'' covered under the '''''RoofStar Guarantee Program'''''.
</li></ol>

===2.1.6. Reserved===

===2.1.7. Walls===
(See [[Notes to GLW Standard#A-2.1.7.| Note A-2.1.7.]])

====2.1.7.1. General====
<ol>
<li>''Wall'' surfaces must be clean, dry, and smooth, suitable for the application of ''waterproofing system'' materials.
<li>''Wall'' framing must be sheathed with a material suitable for adhering waterproofing membranes and securing metal flashings; when sheathing is unsuitable, it must be overlaid with an accepted wall overlay.
<li>''Sheathing'' is considered a wall surface for the purpose of this Standard.
<li>''Wall'' surfaces suitable for receiving ''waterproofing'' materials must extend beyond the maximum installed height of the ''waterproofing'', but in any event must be installed at least 203.2 mm (8”) above the ''finished system surface'' (For ''wall'' overlays, refer to [[#5.2.1.3. Overlays for Walls | Article 5.2.1.3.]]).
<li>Indirect connections between ''walls'' and the structural ''deck'' require a ''control joint'' (See [[Notes to GLW Standard#A-10.1.6.2. | Note A-10.1.6.2.]]).
</li></ol>

===2.1.8. Reserved===

==Section 2.2. Materials==
===2.2.1. Material Properties===
====2.2.1.1. Sheathing for Framed Walls====

<ol>
<li>Framed wall sheathing must be
<ol>
<li>moisture resistant fibreglass-faced silicon treated gypsum core board, with a minimum thickness of 12.7 mm (1/2”) (These panels are specifically designed to receive waterproofing membranes and may be installed horizontally or vertically).
<li>fibre-reinforced cementitious panels with a minimum thickness of 9.53 mm (3/8"), or
<li>plywood, having a minimum thickness of 12.7 mm (1/2”).
</li></ol>
<li>Where ''wall'' sheathing is unsuitable to receive waterproofing materials, refer to [[#Part 5 - Deck and Wall Overlays | Part 5, "Deck and Wall Overlays"]].
</li></ol>

==Section 2.3. Application==
===2.3.1. Guarantee Term Requirements===
====2.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

===2.3.2. All Systems ===
====2.3.2.1. Construction of Decks and Walls====

<ol>
<li>Unless otherwise permitted and described in this Standard, the construction of ''deck'' and ''wall'' structures, and their suitability for the application of waterproofing materials, is the responsibility of other trades.
</li></ol>

<hr>
<div id=PART_3></div>

=Part 3 - Securing the Waterproofing Assembly=

==Section 3.1. Design==
===3.1.1. General===
====3.1.1.1. Scope====
(See [[Notes to GLW Standard#A-3.1.1.1.| Note A-3.1.1.1.]])

<ol>
<li>For waterproofing assemblies that are exposed to wind, refer to the design, material, and application requirements for wind resistance, published in Part 3 of the published RGC Standard for the specific membrane, for uninsulated or insulated (protected) systems:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#Part_3_-_Securing_the_Roof_Assembly Part 3] in the RGC Standard for SBS-modified Bituminous Membrane Roofs.
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#Part_3_-_Securing_the_Roof_Assembly Part 3] in the RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs.
</li></ol>
</li></ol>

<hr>
<div id=PART_4></div>

=Part 4 - Materials=
==Section 4.1. Design==
===4.1.1. General===
====4.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====4.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Primary Material'', as used in this Standard, means a material used in a ''waterproofing system'' that is manufactured for exposure to the weather.
<li>''Secondary Material'', as used in this Standard, means a material that is used in a ''waterproofing system'' that is not usually exposed to the weather.
</li></ol>
</li></ol>

==Section 4.2. Materials==
===4.2.1. Material Properties===
====4.2.1.1. Use of Accepted Materials====
(For limitations and exclusions pertaining to materials, see [[Guarantee#3.2.1.2. Limitations and Exclusions of Guarantee | Division A, Article 3.2.1.2.]])

<ol>
<li>All materials installed by the ''Contractor'', for new construction or alterations, must be
<ol>
<li>newly manufactured (except for reusable insulation; see [[#7.1.3.2. General Requirements | Article 7.1.3.2.]]), and may not be recycled without the expressed, written consent of the '''''Guarantor''''',
<li>accepted by the '''''RoofStar Guarantee Program''''', and
<li>manufactured by, or listed as acceptable to, the manufacturer of the ''primary material''.
</li></ol>
<li>All uninstalled materials must be
<ol>
<li>protected from weather with wrappers approved or recommended by the ''manufacturer'',
<li>properly stacked, and
<li>secured above ground or on the ''project'' surface.
</li></ol>
<li>All installed roofing materials that are susceptible to moisture damage must be made watertight by the end of each workday.
<li>Metals and fasteners must be compatible with each other, to avoid galvanic corrosion which can occur when dissimilar metals contact each other.
</li></ol>

==Section 4.3. Application==
===4.3.1. Guarantee Term Requirements===
====4.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====4.3.1.2. Reserved====

===4.3.2. All Systems===
====4.3.2.1. Application of New Materials====

<ol>
<li>All new materials installed as part of the ''waterproofing system'' shall conform to the ''manufacturer's'' published requirements, unless superseded by this Standard.
</li></ol>

<hr>
<div id=PART_5></div>

=Part 5 - Deck and Wall Overlays=
(See [[Notes to GLW Standard#A-5| Note A-5]])

==Section 5.1. Design==
===5.1.1. General===
====5.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====5.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===5.1.2. Guarantee Term Requirements===
====5.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====5.1.2.2. Reserved====

===5.1.3. All Systems===
====5.1.3.1. Required Use of Overlays====
(See [[Notes to GLW Standard#A-5.1.3.1.| Note A-5.1.3.1.]]; see also [[#Part 9 - Membrane System field) | Part 9]] and [[#Part 10 - Perimeters and Walls | Part 10]] for substrate preparation requirements)

<ol>
<li>Two layers of fibre-reinforced cement board deck overlay conforming to the requirements in [[#5.2.1.1. Suitability of Overlays | Article 5.2.1.1.]] must be specified when the ''deck'' is steel.
<li>When wall sheathing is not suitable to receive waterproofing, at least one layer of an acceptable wall overlay conforming to [[#5.2.1.3. Overlays for Walls | Article 5.2.1.3.]] shall be specified for ''walls'' (other than concrete) that will receive waterproofing materials.
</li></ol>

==Section 5.2. Materials==
(See [[Division_C | Division C]])

===5.2.1. Material Properties===
====5.2.1.1. Suitability of Overlays====

<ol>
<li>''Deck'' and ''wall'' overlays must be
<ol>
<li>listed in [[Division_C | Division C]],
<li>acceptable to the ''manufacturer'',
<li>suitable for the type of ''deck'', and
<li>suitable for, and compatible with, any membrane or panel application.
</li></ol>
</li></ol>

====5.2.1.2. Overlays for Decks====

<ol>
<li>Only fibre-reinforced cementitious panels (boards) may be used on steel ''decks'' and shall be
<ol>
<li>manufactured in conformance with ASTM C1325 (latest edition), “Standard Specification for Fiber-Mat Reinforced Cementitious Backer Units”,
<li>at least 12.7 mm (1/2”) thick,
<li>acceptable to the ''manufacturer'',
<li>suitable for the type of ''deck'', and
<li>suitable for, and compatible with, any membrane or panel application.
</li></ol>
</li></ol>

====5.2.1.3. Overlays for Walls====

<ol>
<li>In addition to overlays listed in [[Division_C | Division C]], ''walls'' may be overlaid with
<ol>
<li>plywood, provided the plywood is least 12.7 mm (1/2”) thick and is pressure-treated when applied over concrete or concrete masonry units (CMU),
<li>Type A fibre-reinforced cementitious panels (boards) manufactured in conformance with ASTM C1325 (latest edition), “Standard Specification for Fiber-Mat Reinforced Cementitious Backer Units”, or
<li>inorganic moisture-resistant panels listed in [[Division_C | Division C]].
</li></ol>
</li></ol>

====5.2.1.4. Fasteners====

<ol>
<li>Refer to Article 3.2.2.1. of the related ''waterproofing roof'' Standard.
</li></ol>

==Section 5.3. Application==
(This Section shall be read in conjunction with the requirements for substrate preparation in [[#Part 9 - Roof Field (Membrane Systems) | Part 9]] and [[#Part 10 - Perimeters and Walls | Part 10]])

===5.3.1. Guarantee Term Requirements===
====5.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====5.3.1.2. Reserved====

===5.3.2. All Systems===
====5.3.2.1. Overlays on Concrete Decks====

<ol>
<li>A ''deck'' overlay board is not mandatory on a concrete ''deck'', but when it is specified, it must be installed to conform to the requirements in this Part.
</li></ol>

====5.3.2.2. Overlays on Steel Decks====

<ol>
<li>Steel decks must provide a smooth, even surface for waterproofing and therefore must be topped with concrete or overlaid with no fewer than two layers of fibre-mat reinforced cement boards.
<li>''Deck'' overlays must be
<ol>
<li>fully or intermittently supported along all edges by the ''deck'', and
<li>installed in a staggered pattern (offset) 304.8 mm (12") from adjacent board rows (a minus offset tolerance of 50.8 mm (2") maximum will be permitted to compensate for variance in the manufacturer's tolerance of differing board widths and lengths).
</li></ol>
<li>The base layer of ''deck'' overlays shall be affixed to the ''deck'' with mechanical fasteners or adhesives acceptable to the ''manufacturer'' specified by the ''Design Authority'' and conforming to the requirements in Article 3.2.2.1. or 3.2.2.2. of the related ''waterproofing roof'' Standard.
<li>When spacing requirements for fasteners are not provided by the ''Design Authority'', installation shall comply with the requirements in '''Table 5.3.2.2.-A'''.
<li>Only adhesives acceptable to the ''manufacturer'' shall be used to secure the second layer of ''deck'' overlays; mechanical fixation through both layers is not permitted.
<li>When the waterproofing membrane is liquid-applied (including hot-applied rubberized asphalt), all board joints that will receive liquid applied membrane systems must be taped with the waterproofing ''manufacturer's'' approved joint tape.
</li></ol>
 
::::{|
|-
|-
| colspan="4"; style="text-align:center;width:450px;" | '''Table 5.3.2.2.-A Minimum Fastener Requirements for Deck Overlay Fastening''' Forming Part of Article 5.3.2.2.
|-
|}
{| class="wikitable" style="margin-left: 20pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:center;"
|-
! Thickness !! Deck Flute Width !! Board Size !! Screws & Metal Stress Plates
|-
| 9.5 mm (3/8”) || up to 125 mm (5") || 1200 mm x 2400 mm (48" x 96") || 12
|-
| 12.7 mm (1/2") || up to 125 mm (5") || 1200 mm x 2400 mm (48" x 96") || 12
|-
| 15.9 mm (5/8") || up to 200mm (8") || 1200 mm x 2400 mm (48" x 96") || 12
|-
|}

====5.3.2.3. Overlays on Steel Decks with Concrete Topping====

<ol>
<li>A ''deck'' overlay is not required for steel ''decks'' topped with concrete..
</li></ol>

====5.3.2.4. Reserved====

====5.3.2.5. Support, Arrangement, and Securement of Wall Overlays====

<ol>
<li>All concrete or masonry ''parapets'' and ''walls'' must provide a smooth, clean, dry surface for membrane adhesion.
<li>When ''walls'' do not provide a smooth, clean, dry surface for membrane adhesion may be overlaid with a minimum 15.9 mm (5/8") treated plywood or 9.5 mm (3/8") reinforced cement board that conforms to Type A fibre-reinforced cementitious panels (boards) manufactured in conformance with ASTM C1325 (latest edition), “Standard Specification for Fiber-Mat Reinforced Cementitious Backer Units”.
<li>''Wall'' overlays must be mechanically attached or adhered to the wall with polyurethane an adhesive acceptable to the ''manufacturer''.
<li>When waterproofing is applied directly to masonry ''parapets'' or ''walls'', follow the applicable RGC roof Standard from [[Division B | Division B]].
<li>A ''parapet wall'' is required at adjoining walls where the ''deck'' is not supported by the ''wall'' (expansion joint) and shall be sheathed with minimum 15.9 mm (5/8") plywood or 9.5 mm (3/8") reinforced cement board that conforms to ASTM C1325-04.
<li>Wall sheathing shall be fastened to preservative treated blocking or to steel stud framing that is attached solidly to the ''deck'' and not the ''wall''.
<li>Compressible insulation is to be installed between the sheathing and the ''wall'' and an accepted expansion joint membrane as well as metal counter flashing shall be installed.
</li></ol>

<hr>
<div id=PART_6></div>

=Part 6 - Air and Vapour Controls=
(See [[Notes to GLW Standard#A-6 | Note A-6]])

==Section 6.1. Design==
===6.1.1 General===
====6.1.1.1. Scope====
(See [[Notes to GLW Standard#A-6.1.1.1. | Note A-6.1.1.1.]])

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====6.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Air barrier'' means a material that is manufactured and tested to prohibit the passage of air through that material.
<li>''Continuity'' means a sealed, resistive, continuous connection
<ol>
<li>between ''control layers'' that have the same function, and
<li>between a ''control layer'' and another material or object it joins to (i.e., a roof drain or penetration).
</li></ol>
<li>''Control layer'' means a material used in a ''waterproofing assembly'' or ''wall assembly'', that is manufactured and tested to resist or control the movement of air, vapour, or liquid water into or through that assembly.
<li>''Vapour retarder'' means a material that is manufactured and tested to prohibit or regulate the passage of water vapour through that material.
<li>''Water resistive barrier'' (WRB) means a material that is manufactured and tested to resist the transmission of liquid water through the material and is usually used in wall assemblies.
</li></ol>
</li></ol>

===6.1.2. Guarantee Term Requirements===
====6.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====6.1.2.2. Reserved====

===6.1.3. All Systems===
====6.1.3.1. Responsibility for Design====

<ol>
<li>The ''Design Authority'' is responsible for specifying
<ol>
<li>air and vapour control materials,
<li>the placement of continuous air and vapour ''control layers'' in relation to a ''waterproofing system'' and its components, and
<li>the selection of suitable materials for that application (See [[Notes to Hot Rubber Standard#A-6.1.3.1. | Note A-6.1.3.1.]]).
</li></ol>
<li>The ''Design Authority'' is urged to review and consider the performance characteristics of materials available for such applications.
<li>Coverage under the '''''RoofStar Guarantee''''' shall be as described in [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]].
<li>Notwithstanding coverage provisions in Division A, neither the '''''RoofStar Guarantee Program''''' nor the ''Contractor'' will accept any responsibility for damage to, or failure of, the ''waterproofing system'' caused by the use or absence of air or vapour ''control layers''.
</li></ol>

====6.1.3.2. Continuity of Control Layers====

<ol>
<li>The ''Design Authority'', and trades constructing walls and waterproofing assemblies, are jointly responsible for making proper connections (continuity) between air and vapour control ''systems'', including the transitions between assemblies built by different trades (See [[#6.1.3.1. Responsibility for Design | Article 6.1.3.1.]] and [[#6.3.2.1. Continuity and Support | Article 6.3.2.1.]]).
<li>Where air, vapour, or water ''control layers'' intersect a ''roof drain'', ''overflow drain'', ''scupper drain'', or penetration, the intersection must be designed for ''continuity'', and drawings must detail the execution of ''continuity'' for the ''Contractor''.
<li>''Overflow drains'' and ''scupper drains'' that penetrate ''wall assemblies'' must be designed and drawn to prevent air intrusion from the outside environment (See Article 3.1.5.1. in the related ''waterproofing roof'' Standard).
</li></ol>

====6.1.3.3. Use of Air Control Materials====

<ol>
<li>The ''Design Authority'' is responsible for the selection of air control materials (some air ''control layers'' are considered vapour permeable, others vapour-impermeable); ''waterproofing systems'' intended to qualify for a '''''RoofStar Guarantee''''' should be designed according to the regulatory design and installation requirements for effective, continuous air control ''systems''.
<li>All materials selected by the ''Design Authority'' should conform to the material and performance characteristics required in the "British Columbia Building Code", Division B,[https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp5s54 Article 5.4.1.2., "Air Barrier System Properties"].
</li></ol>

====6.1.3.4. Use of Vapour Control Materials====

<ol>
<li>Because continuous vapour ''control layers'' may be needed to limit “water vapour transmission and condensation, burn protection, and severe climatic conditions” (National Energy Code of Canada for Buildings 2020, [https://nrc-publications.canada.ca/eng/view/ft/?id=af36747e-3eee-4024-a1b4-73833555c7fa Article 5.2.5.3.(1), "Other Considerations"]; see also the "British Columbia Building Code", Division B, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp5s55 Article 5.5.1.1., "Required Resistance to Vapour Diffusion"]), they are considered discretionary and must be specified by the ''Design Authority''.
<li>Where continuous vapour ''control layers'' are required and specified by Code, the '''''RoofStar Guarantee Program''''' requires that a suitable vapour control ''system'' be selected by the ''Design Authority'' and properly installed by the ''Contractor'' in conformity with the vapour ''control layer'' manufacturer’s published instructions, and with the ''Design Authority’s'' specified details.
</li></ol>

====6.1.3.5. Reserved====

====6.1.3.6. Reserved====

==Section 6.2. Materials==
===6.2.1. Material Properties===
====6.2.1.1. Compatibility with Other Materials====

<ol>
<li>The material selected for air and vapour ''control layers'' must be compatible with any other materials in the ''waterproofing system'' or ''wall'' ''assembly'' to which the ''control layer'' may come in contact, including (without limitation) contact with primers and adhesives, substrates, solvents, and cleaners.
</li></ol>

====6.2.1.2. Permitted Materials for RoofStar Guarantee====
(See [[Notes to GLW Standard#A-6.2.1.2. | Note A-6.2.1.2.]])

<ol>
<li>While responsibility for the selection of suitable air and vapour ''control layers'' rests with the ''Design Authority'', a ''waterproofing system'' designed and built to qualify for a '''''RoofStar Guarantee''''' must satisfy the requirements in [[#6.2.1.3. Puncture Resistance and Thickness | Article 6.2.1.3.]]
</li></ol>

====6.2.1.3. Puncture Resistance and Thickness====

<ol>
<li>Air and vapour controls should be installed over a continuous smooth plane, regardless of a material's ability to span voids or spaces in the deck.
<li>Fully supported air and vapour ''control layers'' should possess a minimum published static puncture resistance rating of 150 N (34 lbf) (Ref. CGSB-37.56-M for both test method and standard limits) and be either self-adhering or torch-applied; a high puncture resistance is necessary for the membrane to withstand accidental damage during construction.
<li>Where no ''deck'' overlay board is installed and the air and vapour ''control layers'' are partially unsupported (for example, on a steel ''deck''), the ''control layers'' must possess a published static puncture resistance of at least 400 N (90 lbf).
<li>Should the air or vapour ''control layers'' be used as a temporary roof during ''project'' construction by either the ''Contractor'' or by other trades, a minimum 2 mm thick bituminous membrane is recommended.
</li></ol>

====6.2.1.4. Self-adhered and Torch-applied Materials====

<ol>
<li>Self-adhering or adhesive-applied materials should be considered as alternatives to torch-applied membranes when the substrate to which they will be applied is combustible, or when nearby structures, openings or materials present a fire hazard.
<li>A suitable separation or overlay material may be used as protection from open flame is acceptable; the application of materials to a combustible surface, using a torch, is strictly prohibited.
</li></ol>

====6.2.1.5. Reserved====

==Section 6.3. Application==
===6.3.1. Guarantee Term Requirements===
====6.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====6.3.1.2. Reserved====

===6.3.2. All Systems===
====6.3.2.1. Continuity and Support====

<ol>
<li>The ''Contractor'' must
<ol>
<li>ensure that air and vapour ''control layers'' that form part of ''wall'' assemblies and tie into the ''waterproofing assembly'' are installed to provide at least 101.6 mm (4”) of overlap, for ''continuity'' of matching layers in adjacent assemblies,
<li>ensure that air and vapour ''control layers'' are sealed to penetrations and drains that pass through or enter the ''waterproofing assembly'', and
<li>seal all ''control layers'' to matching layers in adjacent assemblies (i.e., ''walls'').
</li></ol>
<li>Installation of all air and vapour control materials must be smooth and uniform, without wrinkles or fish-mouths, and must also conform to the manufacturer’s published requirements and the ''Design Authority’s'' design details.
<li>All air and vapour control membrane side and end laps must be fully supported, in the field and at transitions with curbs, ''parapets'', ''walls'', and penetrations.
<li>''Drains'', ''overflow drains'', ''scupper drains'', and penetrations must be detailed where they intersect an air, vapour, or water ''control layer'', to provide ''continuity''.
</ol></li>

====6.3.2.2. Torch-applied Materials====

<ol>
<li>The application of materials to unprotected combustible materials, using a torch, is strictly prohibited.
<li>All combustible materials MUST be protected from open flame by an acceptable separation or overlay material; this includes, without limitation, combustible materials
<ol>
<li>on ''decks'', ''walls'', blocking, and canted edges, and
<li>that are hidden or obscured within voids, cracks, or orifices.
</li></ol>
<li>When a torch-applied membrane is specified over or adjacent to combustible materials, all joints between overlay panels, and at ''waterproofing system''-''wall'' transitions, must be sealed with the primary membrane ''manufacturer’s'' approved self-adhered membrane or tapes.
<li>Where torch-applied membranes are not permitted or desirable, the installation of bituminous air and vapour ''control layers'' should align with the approaches described and required in the "Standard for SBS-modified Bitumen Membrane Roof Systems", [[SBS_Roof_Systems_Standard#10.3.8. Alternative Approaches to Sheet Membrane Flashing | Subsection 10.3.8., "Alternative Approaches to Sheet Membrane Flashing"]].
</li></ol>

====6.3.2.3. Securement on Slopes====

<ol>
<li>Self-adhered membranes applied to slopes greater than 1:6 (2” in 12”) should be additionally secured with mechanical fasteners in locations where slippage may occur, to counter-act material displacement resulting from temperatures that exceed the membrane’s service temperature.
</li></ol>

====6.3.2.4. Reserved====

<hr>

<div id=PART_7></div>

=Part 7 - Insulation=
==Section 7.1. Design==
===7.1.1. General===
====7.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====7.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Heat-resistant insulation'' means insulation that resists heat and will not physically or chemically change when exposed to heat greater than 70°C (158°F), including heat from liquefied bitumen. Insulation boards of this type include fibreboard, polyisocyanurate, and mineral fibre ("wool"). Note that "heat-resistant" does not mean or even infer 'fire-proof'. While some heat-resistant insulation materials will resist burning for a time, only mineral fibre insulation will not burn.
<li>''Heat-sensitive insulation'' means insulation that may be physically or chemically altered when exposed to heat greater than 70°C (158°F) — for example, heat from a torch or from liquefied bitumen. Heat-sensitive insulation includes EPS, XPS and polyurethane.
</li></ol>
</li></ol>

===7.1.2. Guarantee Term Requirements===
====7.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====7.1.2.2. Reserved====

====7.1.2.3. Reserved====

===7.1.3. All Systems===
====7.1.3.1. Responsibility for Design====
(See [[Notes to GLW Standard#A-7.1.3.1.| Note A-7.1.3.1.]])

<ol>
<li>The ''Design Authority'' is responsible to ensure the design conforms to the Building Code and any other applicable requirements.
</li></ol>

====7.1.3.2. General Requirements====

<ol>
<li>Selected board insulation products may be used within the membrane ''waterproofing systems'', provided the panels are listed in [[Division_C | Division C]], and conform to the material specifications in [[#Section 7.2. Materials | Section 7.2.]]
</li></ol>

====7.1.3.3. Use of Existing Insulation====

<ol>
<li>Existing insulation in a ''waterproofing system'' may be reused (it will be excluded from coverage under the '''''Guarantee''''', which applies only to new materials), provided
<ol>
<li>the insulation is dry (most XPS insulation absorbs water vapour while in service),
<li>the ''Design Authority'' has specified its reuse, and
<li>the condition of the insulation is acceptable to the ''Design Authority'' as suitable to satisfy the requirements of the Building Code.
</li></ol>
</li></ol>

====7.1.3.4. Thermal Resistance and Layering====
(See [[Notes to GLW Standard#A-7.1.3.4.| Note A-7.1.3.4.]])

<ol>
<li>All insulated ''waterproofing systems'' with a cumulative thermal resistance greater than RSI-2.64 (R-15) (based on published LTTR values measured at 24°C) must be installed in multiple layers that are offset and staggered (See [[#Section 7.3. Application | Section 7.3., "Application"]]).
<li>In a multi-layered ''assembly'', any single layer of insulation in the field may have a thermal resistance greater than RSI-2.64 (R-15) provided no one layer exceeds 60% of the cumulative thermal resistance of the combined ''assembly'' of insulation, measured together with the thermal resistance of insulation overlay boards (See '''Figure 7.1.3.4.-A''').
<li>At intersections with insulated curbs and walls, insulation joints at the ''waterproofing system''-wall interface must be offset and staggered to minimize or eliminate thermal bridging (See '''Figure 7.3.2.2.-A)'''.
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 7.1.3.4.-A Effective Thermal Resistance and Layering''' Forming Part of Sentence 7.1.3.4.(2) (Click to expand illustration)
|-
| [[File:Figure 7.1.3.-A (XPS).jpg|link=https://rpm.rcabc.org/images/a/ae/Figure_7.1.3.-A_%28XPS%29.jpg | 600 px]]
|}

===7.1.4. Reserved===

===7.1.5. Reserved===

===7.1.6. Protected Waterproofing Systems===
(The requirements in [[#7.1.3. All Systems | Subsection 7.1.3., "All Systems"]], shall be read together with the following articles)

====7.1.6.1. Insulation Selection====

<ol>
<li>Only extruded polystyrene insulation (XPS) may be specified for a ''waterproofing system''.
</li></ol>

====7.1.6.2. Drainage Mats and Filter Fabric====

<ol>
<li>At least one drainage layer is required in a ''protected waterproofing system'', either above or below the XPS insulation, but
<ol>
<li>when openings for penetrations in ''walls'' or the ''deck'' provide less than 203.2 mm (8”) of clearance, the filtration layer must be water-permeable and the drainage layer shall be below the XPS insulation, to lower the ''drainage plane'' and minimize leaks into the building, and
<li>a drainage layer shall be specified above the XPS insulation when any ''overburden'' superimposed on the ''waterproofing system'' will result in a “vapour-closed” condition (i.e., landscaping, or an impermeable wearing course).
</li></ol>
<li>Filter fabric must be specified to cover XPS insulation, to
<ol>
<li>contain the insulation and thereby prevent ‘insulation stacking’ (displacement) when insulation boards become buoyant in water, and
<li>prevent fines from settling at the membrane level and filling the voids between insulation board joints.
</li></ol>
</li></ol>

==Section 7.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===7.2.1. Material Properties===
====7.2.1.1. General====

<ol>
<li>Only insulation boards accepted for use in the '''''RoofStar Guarantee Program''''', and acceptable to the membrane manufacturer, may be used to qualify for a '''''RoofStar Guarantee'''''.
</li></ol>

====7.2.1.2. Material Dimensions====

<ol>
<li>While minimal insulation panel thicknesses are permissible for some designs, some materials are by their nature breakable, and therefore the ''Design Authority'' should consider the constructability of the ''waterproofing system'' from a material handling perspective and consider specifying a thicker panel.
</li></ol>
</li></ol>

====7.2.1.3. Drainage Mats====

<ol>
<li>Drainage mats shall conform to the requirements in [[#14.2.1.4. Drainage and Water Retention Materials | Article 14.2.1.4.]]
</li></ol>

====7.2.1.4. Filter Fabric====

<ol>
<li>Filter fabrics shall conform to the requirements in [[#14.2.1.6. Filter Fabric | Article 14.2.1.6.]]
</li></ol>

===7.2.2. Suitability of Insulation===
====7.2.2.1. Extruded Polystyrene Insulation====

<ol>
<li>Extruded polystyrene insulation ("XPS") is ''heat-sensitive'' and
<ol>
<li>shall conform to CAN/CGSB-51.20-M87, "Thermal Insulation, Polystyrene, Boards and Pipe Covering", for Type 4 insulation, and to ASTM C578, "Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation", and
<li>is the only insulation that may be specified and installed in a ''waterproofing system''.
</li></ol>
</li></ol>

==Section 7.3. Application==
===7.3.1. Guarantee Term Requirements===
====7.3.1.1. RoofStar 5-year and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====7.3.1.2. Reserved====

===7.3.2. All Systems===
====7.3.2.1. Procurement of Insulation====

<ol>
<li>All insulation, except insulation that may be specified for re-use (See [[#7.1.3.2. General Requirements | Article 7.1.3.2.]]), must be supplied and installed by the ''Contractor''.
</li></ol>

====7.3.2.2. Alignment, Sizing, and Support====

<ol>
<li>Insulation boards
<ol>
<li>must be clean and dry,
<li>must be firmly supported,
<li>should be square and should make firm, full contact with adjacent panels,
<li>must be installed with the appropriate grade of expanding spray foam applied to gaps greater than 6.35 mm (1/4”) (this requirement does not apply to extruded polystyrene (XPS) installed in a ''protected waterproofing system''), and
<li>shall not be soldiered and must be laterally offset at least 304.8 mm (12") in two directions, both for adjacent layers and for adjacent row; a minus offset tolerance of 50.8 mm (2") maximum is permissible (See '''Figure 7.3.2.2.-A''').
</li></ol>
<li>Offsets are not required for
<ol>
<li>sloped insulation boards that are generally installed soldiered fashion to adjacent rows, and
<li>the first layer of overlay board, installed on top of heat-sensitive insulation, which may be soldiered to facilitate joint taping.
</li></ol>
 
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 7.3.2.2.-A Offset and Staggered Layering in Field''' Forming Part of Clause 7.3.2.2.(1)(4) (Click to expand illustration)
|-
| [[File:Figure 7.3.2.-A (XPS).jpg|link=https://rpm.rcabc.org/images/1/15/Figure_7.3.2.-A_%28XPS%29.jpg | 500 px]]
|}
 
<li>On exterior insulated walls, insulation joints at the waterproofing system-wall interface must be offset and staggered to eliminate thermal bridging (See '''Figure 7.3.2.2.-B''').
 
 
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 7.3.2.2.-B Offset and Staggered Layering at Wall''' Forming Part of Clause 7.3.2.2.(3) (Click to expand illustration)
|-
| [[File:Figure 7.3.2.2.-B (Hot Rubber).png|link=https://rpm.rcabc.org/images/3/30/Figure_7.3.2.2.-B_%28Hot_Rubber%29.png| 500 px]]
|}
</li></ol>

====7.3.2.3. Insulation Securement====

<ol>
<li>Insulation securement shall conform to the specified design for the ''waterproofing assembly'', calculated to resist flotation and (when applicable) ''specified wind loads''.
</li></ol>

====7.3.2.4. Reserved====

===7.3.3. Reserved===

===7.3.4. Reserved===
===7.3.5. Protected Waterproofing Systems===
(The requirements in [[#7.3.2. All Systems | Subsection 7.3.2., "All Systems"]], shall be read together with the following articles)

====7.3.5.1. Sequencing of Work====

<ol>
<li>Insulation installed against ''walls'' or ''curbs'' must be separated from waterproofing membranes with a non-bonding drainage mat or slip sheet.
<li>Insulation must be secured and protected immediately after installation.
</li></ol>

====7.3.5.2. Drainage Mats====
(See also [[#Part 11 - Drainage | Part 11, "Drainage"]])

<ol>
<li>At least one drainage layer is required in a ''waterproofing system'' and its location within the system shall conform to the design requirements in [[#7.1.6.2. Drainage Mats and Filter Fabric| Sentence 7.1.6.2.(1)]].
<li>A drainage mat must be installed below the XPS insulation.
<li>A second drainage layer may be installed above the insulation but is at the discretion of the ''Design Authority''.
<li>If a second drainage layer is specified, a vertical separation space measuring at least 12.7 mm (1/2″) must be preserved between the drainage layer and any ballast or overburden, to permit airflow and to assist in leveling.
<li>Specialized proprietary drainage products must be acceptable to the membrane ''manufacturer''.
<li>Ballast guards must be installed around all roof drains.
</li></ol>

====7.3.5.3. Filter Fabric====

<ol>
<li>Fabric filter mats must be
<ol>
<li>installed loose-laid (un-bonded) over the insulation and below any type of ballast or ''waterproofing system'' covering,
<li>overlapped at all edges a minimum of 304.8 mm (12”),
<li>at least 2438.4 mm x 2438.4 mm (96" x 96") in size, and
<li>slit to fit over roof penetrations or cut out around ''drains'' and other openings.
</li></ol>
<li>Filter fabric must extend up perimeter edges and ''curbs'' and must be placed loose (unattached) under metal counter flashings or wall finishes.
<li>When the filtration layer is part of a ''vegetated roof assembly'', the filtration layer shall conform to [https://rpm.rcabc.org/index.php?title=VRA_Standard#10.3.2.7._Installation_of_Void_Fill_and_Filtration_Layers Article 10.3.2.7.] of the “RGC Standard for Vegetated Roofs”.
</li></ol>

<hr>
<div id=PART_8></div>

=Part 8 - Reserved=

<hr>
<div id=PART_9></div>

=Part 9 - Membrane System Field=
==Section 9.1. Design==
===9.1.1. General===
====9.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====9.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Manufacturer'' means the manufacturer of the primary waterproofing material, unless stated otherwise.
<li>''Parallel to Slope'' means the direction parallel to the angle of a sloped plane.
</li></ol>
</li></ol>

===9.1.2. Guarantee Term Requirements===
====9.1.2.1. RoofStar 5-year Guarantee Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in Part 9 of the relevant RGC Standard for Waterproofing Roofs (See [[#9.1.3.1. General Requirements | Article 9.1.3.1.]] in this Standard)..
</li></ol>

====9.1.2.2. Reserved====

====9.1.2.3. Reserved====

===9.1.3. All Systems===
====9.1.3.1. General Requirements====

<ol>
<li>Only waterproofing membrane systems that are fully adhered and have an accepted protection layer installed above the membrane (protected) qualifies for coverage under the '''''RoofStar Guarantee Program'''''.
<li>All ''waterproofing system'' accessory components must be supplied or be accepted for use by the membrane ''manufacturer''.
<li>All materials must be protected from weather by properly stacking above ground or Deck surfaces and keep in factory packaging or other adequate covering until applied
</li></ol>

====9.1.3.2. Requirements for SBS-modified Bituminous Membrane Systems====

<ol>
<li>The field application of SBS-modified bituminous membrane ''waterproofing systems'' on structural ''decks'' at grade shall conform to the requirements in Part 9 of the [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard RGC Standard for SBS-modified Bitumen Membrane Roofs], published in [[Division B | Division B]] of this ''Manual''.
<li>Fully adhered membranes means membranes that are torch-applied, self-adhered, hot-mopped, or adhesive-applied; no other applications are permissible in ''waterproofing assemblies''.
</li></ol>

====9.1.3.3. Requirements for Hot Fluid-applied Rubberized Asphalt Systems====

<ol>
<li>The field application of hot fluid-applied rubberized asphalt ''waterproofing systems'' on structural ''decks'' at grade shall conform to the requirements in Part 9 of the [https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs], published in [[Division B | Division B]] of this ''Manual''.
</li></ol>

====9.1.3.4. Control Joints (Area Dividers)====

<ol>
<li>When ''control joints'' (system dividers) are recommended or required by the ''manufacturer'', or are deemed necessary by the ''Design Authority'', they must be designed following the requirements in [[#10.1.6.2. Control Joints (Area Dividers) | Article 10.1.6.2.]]
</li></ol>

====9.1.3.5. Securement====
(See [[Notes to GLW Standard#A-9.1.3.3. | Note A-9.1.3.3.]])

<ol>
<li>''Waterproofing assemblies'' that are exposed to wind loads must be secured to resist displacement by ''specified wind loads'', and therefore the requirements in this Article shall be read together with the requirements in [[#Part 3 - Securing the Waterproofing Assembly | Part 3]] of this Standard.
</li></ol>

====9.1.3.6. Membrane Protection====

<ol>
<li>The design must specify immediate protection of a newly installed, fully reinforced membrane, using materials specified or deemed suitable by the ''manufacturer''.
<li>Installed membranes must be protected with materials conforming to the requirements in [[#9.2.1.3. Protection Materials | Article 9.2.1.3.]], using methods conforming to the requirements in [[#9.3.2.7. Protection of Membranes | Article 9.3.2.7.]]
<li>Installed membranes must be protected from damage caused by
<ol>
<li>any walkway surface,
<li>work performed concurrently or subsequently by other trades (the ''Design Authority'' is strongly urged to direct the work of other trades through specific, explicit directives in the design specifications), and
<li>chemicals or other contaminants that may adversely impact the waterproofing membrane or other ''system'' components, including (without limitation)
<ol>
<li>animal or vegetable grease,
<li>hot pipes (release valves),
<li>petroleum products or bi-products, and
<li>miscellaneous fluids from equipment (See also [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6.]] for application of reinforced liquid membrane flashing around roof penetrations).
</li></ol>
</li></ol>
<li>Membranes should be protected from
<ol>
<li>pool or garden chemicals and fertilizers,
<li>pet urine,
<li>bird excrement, and
<li>refrigerants.
</li></ol>
</li></ol>
</li></ol>

====9.1.3.5. Walkways====

<ol>
<li>The membrane must be suitably protected from mechanical damage by walkway surfaces.
<li>Paver walkway surfaces must be suitably supported in keeping with [[#14.1.3.11. Wearing Surfaces | Article 14.1.3.11.]] and [[#14.3.2.5. Wearing Surfaces | Article 14.3.2.5., "Wearing Surfaces"]].
</li></ol>

===9.1.4. Reserved===

===9.1.5. Uninsulated Systems===
(The requirements in [[#9.1.3. All Systems | Subsection 9.1.3., "All Systems"]], shall be read together with the following articles)

====9.1.5.1. General Requirements====

<ol>
<li>The installed membrane must be immediately protected with materials specified or deemed suitable by the ''manufacturer''.
</li></ol>

===9.1.6. Protected Systems===
(The requirements in [[#9.1.3. All Systems | Subsection 9.1.3., "All Systems"]], shall be read together with the following articles)

====9.1.6.1. General Requirements====

<ol>
<li>Ballasted systems shall conform to the requirements in [[#3.3.5.1. Ballasted Systems | Article 3.3.5.1.]] of the related ''waterproofing roof'' Standard, and in [[#9.1.3.3. Securement | Article 9.1.3.3.]] of this Standard.
</li></ol>

==Section 9.2. Materials==
(See [[Division_C | Division C]])

===9.2.1. Material Properties===
====9.2.1.1. Membrane Composition, Thickness, and Selection====

<ol>
<li>In addition to the minimum membrane thickness requirements in Sub-section 9.1.3., membranes shall conform to the requirements in Article 9.2.1.1. of the published RGC Standard for the specific membrane:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
</li></ol>

====9.2.1.2. Reserved====

====9.2.1.3. Protection Materials====

<ol>
<li>Membrane protection materials shall be compatible with the primary membrane, resist puncturing, and (except for ‘hot rubber’) resist bonding with the membrane.
<li>Materials used to protect an SBS-modified bituminous membrane must be
<ol>
<li>an RGC-accepted asphaltic core board measuring at least 4.76 mm (3/16”) thick,
<li>an RGC-accepted cap sheet at least 4.0 mm thick, or
<li>a protection mat acceptable to the membrane ''manufacturer''.
</ol></li>
<li>Materials used to protect a hot fluid-applied rubberized asphalt membrane must be acceptable to and specified by the ''manufacturer'' and shall be either
<ol>
<li>an RGC-accepted asphaltic core board measuring at least 4.76 mm (3/16”) thick, conforming to CSA-A123.25, or
<li>SBS-modified bituminous sheet membranes which shall be
<ol>
<li>reinforced with a non-woven polyester scrim no less than 180g/m2, or with a composite scrim of equal puncture resistance,
<li>no less than 2.0 mm (80 mils) thick, when measured in the middle of the membrane sheet, and
<li>sanded on the underside.
</ol></li>
</ol></li>
<li>Filtration fabrics shall conform to the requirements in [[#7.2.1.4. Filter Fabric | Article 7.2.1.4.]]
</ol></li>

===9.2.2. Materials Storage and Handling===
====9.2.2.1. Protection from the Weather====

<ol>
<li>All uninstalled materials must be protected from weather by properly stacking them above ground, or above the ''waterproofing system'' surface, in or beneath covers that are weather-resistant and secured against displacement by wind (See also [[#4.2.1.1. Use of Accepted Materials | Article 4.2.1.1. Use of Accepted Materials]]).
</ol></li>

===9.2.3. Accessories===
====9.2.3.1. Accessories Supplied by Membrane Manufacturer====

<ol>
<li>All membrane accessory components must be supplied by and acceptable to the ''manufacturer'', as stipulated in [[#9.1.3.1. General Requirements for All Systems | Article 9.1.3.1.]]
</ol></li>

==Section 9.3. Application==
===9.3.1. Guarantee Term Requirements===
====9.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====9.3.1.2. Reserved====

===9.3.2. All Systems===
====9.3.2.1. Preparation of Substrate====

<ol>
<li>All supporting Decks must be acceptable to the manufacturer and must be prepared according to the requirements published in the applicable RGC Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.3.2.1._Preparation_of_Substrate Article 9.3.2.1.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.3.2.1._Preparation_of_Substrate Article 9.3.2.1.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>In addition to the above, the following requirements apply:
<ol>
<li>Pitted, honey-combed surfaces, or surfaces with a Concrete Surface Profile (CSP) greater than 5 must be repaired by others before the membrane application, following acceptable repair practices (e.g., International Concrete Repair Institute technical guidelines, including “210.4R-2021 (PDF) - Guide for Nondestructive Evaluation Methods for Condition Assessment, Repair, and Performance Monitoring of Concrete Structures”).
<li>Concrete ''decks'', ''walls'', ''curbs'' and equipment pads are not to receive adhered waterproofing for a minimum of 28 days after pouring unless expressly instructed in writing by the Project Structural Engineer; ''decks'' formed with shot-crete and lightweight insulating concrete are not acceptable substrates for waterproofing under the RoofStar Guarantee Program (See [[#2.1.5.2. Concrete Decks | Article 2.1.5.2.]]).
<li>The moisture content levels of concrete surfaces, Decks, walls, curbs and equipment pad surfaces, must strictly comply with the membrane manufacturer’s published moisture level application limitations.
<li>All concrete surfaces to receive adhered waterproofing shall be structurally sound, water cured, finished to a Concrete Surface Profile (CSP) from 3 to 5, have a light hair broom finish or be prepared by mechanical means and shall be primed, when applicable, with a membrane ''manufacturer’s'' approved primer (See [[Notes to GLW Standard#A-9.3.2.2.(2) | Note A-9.3.2.2. (2))]].
<li>''Curbs'', blocking, and nailing strips should be installed where required prior to the waterproofing ''Contractor's'' acceptance of the ''deck''.
<li>Pre-cast panels, post-stressed beams, or “T” and cavity ''decks'' shall have a minimum 50mm (2”) concrete topping applied over the ''deck'' prior to the application of the waterproofing membranes.
<li>Where a difference exists in the levels of adjacent surfaces, the general contractor or others shall install approved non-shrink grout or ground to match level of adjacent surfaces.
<li>Grouting or grinding shall be feathered on the lower surface a minimum distance of twelve times the amount of the vertical differential.
</li></ol>
</li></ol>

====9.3.2.2. Preparation of Waterproofing System Materials====

<ol>
<li>SBS membranes must be unrolled, prepared, and conditioned for installation, as required by the manufacturer.
<li>Product cakes of rubberized asphalt must be
<ol>
<li>heated in a double-jacketed oil bath or hot-air melter to a temperature specified by the ''manufacturer'', and shall not be heated beyond the specified maximum,
<li>maintained at a safe operating temperature, established by the ''manufacturer'', and
<li>continually agitated until installed; avoid heating and agitating the same material for more than six hours.
</li></ol>
</li></ol>

====9.3.2.3. General Requirements for Membrane Application====

<ol>
<li>Membranes shall be installed according to the general and specific requirements of Sub-section 9.3.2. in the applicable RGC Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.3.2._All_Systems Subsection 9.3.2.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.3.2.1._Preparation_of_Substrate Subsection 9.3.2.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
</li></ol>

====9.3.2.4. Cold and Inclement Weather Application====

<ol>
<li>SBS membrane installed during cold weather must follow the membrane ''manufacturer’s'' guidelines for storage and membrane conditioning.
<li>Hot fluid-applied rubberized asphalt shall conform to the following requirements, replicated here from [https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.3.2.4._Cold_and_Inclement_Weather_Application Article 9.3.2.4.] of "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs”
<ol>
<li>Installation during cold weather must follow the manufacturer’s guidelines for storage and membrane conditioning.
<li>When permitted by the ''manufacturer'', membranes may be applied in ambient air temperatures lower than -18⁰ C (0⁰ F), but application below -18⁰ C is not recommended.
<li>Membranes shall not be installed during inclement weather unless expressly permitted by the ''manufacturer'', in writing.
</li></ol>
</li></ol>

====9.3.2.5. Securement on Slopes====

<ol>
<li>''Waterproofing systems'' installed on slopes greater than 1:6 (2” in 12”) are permissible only with a written Variance from the '''''Guarantor'''''.
</li></ol>

====9.3.2.6. Reserved====

====9.3.2.7. Protection of Membranes====

<ol>
<li>Membranes shall be protected according to the general and specific requirements of Sub-section 9.3.2. in the applicable RGC Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.3.2._All_Systems Article 9.3.2.7.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.3.2.1._Preparation_of_Substrate Article 9.3.2.7.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>Membrane protection shall conform to the material requirements in [[#9.2.1.3. Protection Materials | Article 9.2.1.3.]] and shall be completely installed and secured
<ol>
<li>before any construction traffic is permitted on the ''project'' (this prohibition does not apply to workers of the waterproofing trade or moisture monitoring technicians), and
<li>before anyone other than the ''Contractor'' installs any ''overburden''.
</li></ol>
<li>Protection materials shall be installed with tightly fitting butt joints.
<li>Filtration materials shall be overlapped and secured behind linear metal flashings.
</li></ol>

====9.3.2.8. Transitions with Water-shedding Systems====

<ol>
<li>Where slopes less than 1:16 (3/4" in 12") intersect a ''water-shedding system'', the ''waterproofing system'' must be designed to extend up the ''water-shedding system'' slope as described in [[#10.3.7.2. Intersections with Water-Shedding Roofs | Article 10.3.7.2.]], using methods conforming to the general application requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]]
</li></ol>

====9.3.2.9. Walkways====

<ol>
<li>Any walkway pads or supports capable of absorbing solar radiation must be installed on a non-bonding slip sheet, to protect the membrane from damage by heat.
<li>When pavers are used as the walkway material, they must be
<ol>
<li>spaced no closer than 3.18 mm (1/8″),
<li>supported by non-abrasive pads or proprietary pedestals providing a minimum of 12.7 mm (1/2″) of vertical separation to permit adequate airflow and leveling (Slip sheets under pedestals may be necessary to prevent membrane abrasion), and
<li>secured against displacement by wind.
</li></ol>
</li></ol>

===9.3.3. Membrane Application Methods===
(The requirements in [[#9.3.2. All Systems | Subsection 9.3.2., "All Systems"]], shall be read together with the following article)

====9.3.3.1. Additional Requirements for SBS-modified Bituminous Membranes====

<ol>
<li>The application of the following membrane types shall follow the referenced requirements in the “RGC Standard for SBS-modified Bitumen Membrane Roofs”:
<ol>
<li>Self-adhered and Cold-processed membranes shall be installed to conform to the requirements of [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.3.3.1._Self-adhered_and_Cold-processed_Membranes Article 9.3.3.1.]
<li>Hot Asphalt-adhered membranes shall be installed to conform to the requirements of [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.3.3.3._Hot_Asphalt-adhered_Membranes Article 9.3.3.3.]
<li>Torch-applied membranes shall be installed to conform to the requirements of [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.3.3.4._Torch-applied_Membranes Article 9.3.3.4.]
<li>Liquid membrane systems accepted for field application as a second layer in a multi-ply SBS-modified bituminous membrane system shall be installed to conform to the requirements of [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.3.3.5._Liquid_Membranes_.28Field_Application.29 Article 9.3.3.5.]
</li></ol>
</li></ol>

===9.3.4. Reserved===

===9.3.5. Uninsulated Systems===
(The requirements in [[#9.3.2. All Systems | Subsection 9.3.2., "All Systems"]], shall be read together with the following articles)

====9.3.5.1. Reserved====

====9.3.5.2. Membranes Installed on Concrete====

<ol>
<li>Concrete ''decks'' shall be prepared as required in [[#9.3.2.1. Preparation of Substrate | Article 9.3.2.1.]], the application of the primary membrane shall conform to the general requirements in [[#9.3.2.3. General Requirements for Membrane Application | Article 9.3.2.3.]] and (for SBS-modified bituminous membranes) the specific requirements in [[#9.3.3.1. Additional Requirements for SBS-modified Bituminous Membranes | Article 9.3.3.1.]]
</li></ol>

====9.3.5.3. Reserved====

====9.3.5.4. Reserved====

====9.3.5.5. Reserved====

====9.3.5.6. Membrane Protection====
<ol>
<li>Installed membranes must be protected from damage as soon as possible after integrity testing (Refer to [[#9.3.2.7. Protection of Membranes | Article 9.3.2.7.]] for general requirements).
</li></ol>

===9.3.6. Protected Waterproofing Systems===
(The requirements in [[#9.3.2. All Systems | Subsection 9.3.2., "All Systems"]], shall be read together with the following articles)

====9.3.6.1. Reserved====

====9.3.6.2. Membrane Protection====

<ol>
<li>Installed membranes must be protected from damage as soon as possible after integrity testing (Refer to [[#9.3.2.7. Protection of Membranes | Article 9.3.2.7.]] for general requirements).
</ol></li>

====9.3.6.3. Procurement and Installation of Other Materials====

<ol>
<li>All components of a ''waterproofing system'', including the gravel or paver ballast, must be supplied and installed by the ''Contractor''.
</ol></li>

<hr>

<div id=PART_10></div>

=Part 10 - Perimeters and Walls=
==Section 10.1. Design==
===10.1.1. General===
====10.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====10.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===10.1.2. Guarantee Term Requirements===
====10.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====10.1.2.2. Reserved====

===10.1.3. All Systems===
====10.1.3.1. General Requirements====

<ol>
<li>The ''Design Authority'' is responsible to specify the connections between the ''waterproofing system'' and ''walls'' or other building components, particularly where the ''continuity'' of air, vapour and water-resistive ''control layers'' is critical or required by Code (See [[#Part 6 - Air and Vapour Controls | Part 6, "Air and Vapour Controls"]]).
<li>''Projects'' must follow proper sequencing; materials must positively integrate (“shingle fashion”) with other materials, ''systems'', or ''assemblies'', including those installed by other trades.
<li>''Wall'' surfaces must be suitable to receive waterproofing materials, or they must be covered with an accepted overlay panel material listed in [[Division_C | Division C]].
<li>Where the structural slab at grade and an adjoining ''wall'' are constructed of dissimilar materials (i.e., concrete ''deck'' joined to a steel wall), differing expansion and contraction rates for the two materials may adversely affect the ''waterproofing system'' and, in particular, the field and flashing membranes, and therefore it is incumbent upon the ''Design Authority'' to consult the ''manufacturer's'' literature and specify the correct materials for each particular ''deck-wall'' intersection.
</li></ol>

====10.1.3.2. Membrane Flashing====

<ol>
<li>All changes in plane in the ''waterproofing system'', and all intersections between the system field and edges, ''walls'', or ''parapets'', must be flashed using the means and methods described and required in Article 10.1.3.2. of the applicable RGC Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#10.1.3.2._Membrane_Flashing Article 10.1.3.2.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#10.1.3.2._Membrane_Flashing Article 10.1.3.2.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>No UV-sensitive membrane may be left exposed and must be fully protected with
<ol>
<li>the manufacturer’s proprietary protection material, or
<li>base metal flashings.
</li></ol>
<li>All other specifications shall follow the application requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]]
<li>Sheet membrane flashing must be self-adhered, adhered with adhesives, or with torch-applied heat, and shall conform to the requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]]
<li>Linear metal flashing, or a RoofStar-accepted, fleece-reinforced 2-component polymethyl methacrylate (PMMA) liquid membrane flashing, is required at all edges, upper membrane terminations, curb tops, and at the tops of ''parapets'', to protect sheet membrane flashing from damage.
<li>Linear metal flashing used for the termination of sheet membrane flashing plies shall be installed in keeping with [[#Article 13.1.3.3. Securement | Article 13.1.3.3. Securement]].
<li>Sheet membrane flashing must be protected from damage caused by foot traffic or shifting coverings, using base metal flashing or other methods acceptable to the '''''Guarantor'''''.
<li>Where a ''waterproofing assembly'' allows water to freely drain off the edge, and that assembly adjoins a ''wall'', a cricket or diverter should be installed at the ''deck'' edge to prevent water intrusion behind vulnerable wall finishes.
</li></ol>

===10.1.4. Perimeter Details, Walls, and Openings===
(The requirements in [[#10.1.3. All Systems | Subsection 10.1.3., "All Systems"]], shall be read together with the following Articles)

====10.1.4.1. Parapets====

<ol>
<li>While most ''waterproofing assemblies'' drain over the ''deck'' edge (See [[#10.1.4.2. Deck (Slab) Edge | Article 10.1.4.2.]]), when ''parapets'' are specified or required they may be waterproofed before a coping, its membrane, and metal coping (cap) flashing are installed, but the coping will be excluded from coverage unless the ''parapet'' membranes are carried onto and over the coping in accordance with the application requirements described in [[#10.3.4. Perimeter Details, Walls, and Opening | Subsection 10.3.4.]]
<li>On structural ''decks'' exposed to wind load, where ''overburden'' or ballast extends to the ''deck'' edge, ''parapets'' must be designed to retain the material against wind scouring, but in any event, they shall be no less than 203.2 mm (8”) in height when measured from the top of the ''finished system surface''.
<li>With the exception of Sentence (1), ''parapets'' are optional unless required by Code or the Authority Having Jurisdiction, but when a ''parapet'' is specified or otherwise required by this Standard, it must be no less than 127.0 mm (5") in height, measured from the ''finished system surface'' to the inside top edge of the ''parapet'' (this height requirement facilitates proper metal cap flashing securement) (Ref. [[#10.3.4. Perimeter Details, Walls, and Opening | Subsection 10.3.4.]]; also see [[#13.3.2.3. Cap Flashing, Counterflashing, and Reglet Flashing | Article 13.3.2.3. Cap Flashing, Counterflashing, and Reglet Flashing]]).
<li>A ''parapet'' ''wall'' measuring no less than 203.2 mm (8”) is required at the edge of the ''deck'' where the deck is not supported by an adjacent ''wall'', and an ''expansion joint'' ([[#10.1.6.1. Expansion Joints | Article 10.1.6.1.]]) shall join the two at the top of the parapet (See the Expansion Joint (Wall) construction detail).
<li>''Parapets'' with cavities must be designed with consideration for ventilation.
<li>All ''parapet'' copings that form part of the ''Contractor’s'' scope of work must provide solid support for metal coping (cap) flashings and shall be suitable to receive mechanical fasteners (Ref. [[#13.1.3.6. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.1.3.6.]]; also see [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]).
<li>When the width of any ''parapet'' exceeds 101.6 mm (4"), the coping (installed by other trades) must
<ol>
<li>slope toward the waterproofing side of the ''parapet'' ''wall'', and shall
<li>be sloped to meet the minimum requirements for metal coping (cap) flashing in '''Table 13.1.3.4.-A''', [[#13.1.3.4. Gauge, Dimension Limitations, and Seams | Article 13.1.3.4.]]
</li></ol>
<li>Membranes specified for ''parapets'' with a pre-cast or stone coping must be at least 2.5 mm thick and shall be manufactured with a sanded top surface.
</li></ol>

====10.1.4.2. Deck (Slab) Edges====

<ol>
<li>Where a ''waterproofing assembly'' ''deck'' terminates flush with the drainage plane, the ''waterproofing system'' must be designed to seal and waterproof the transitions between the horizontal ''deck'' and any vertical ''walls'' below grade.
</li></ol>

====10.1.4.3. Tall Parapets====

<ol>
<li>When a ''parapet'' higher than 609.6 mm (24") (a tall parapet) is specified as part of the ''Contractor’s'' scope of work,
<ol>
<li>membranes specified for the vertical surface of the ''wall'', above the primary waterproofing membrane flashing, must conform to the requirements in [[#10.2.1.1. Flashing Membranes | Article 10.2.1.1.]], and
<li>additional mechanical securement shall conform to the requirements in this Part, or to the requirements of the ''manufacturer'', whichever is greater.
</li></ol>
<li>All ''waterproofing system'' intersections with ''walls'' shall conform to the requirements in [[#10.1.3. All Systems | Subsection 10.1.3. All Systems]], and shall maintain continuity with the ''wall'' control layers for air, vapour, and water.
<li>''Tall parapets'' with cavities must be designed with consideration for ventilation.
</li></ol>

====10.1.4.4. Reserved====

====10.1.4.5. Doors, Windows, and Wall Openings====

<ol>
<li>Rough openings formed or framed in walls to accommodate doors, windows, curtain-wall assemblies, or other penetrations (i.e., ventilation grilles), should be oversized to allow for the build-up of ''waterproofing system'' flashing membrane.
<li>Low-clearance openings (rough openings less than 203.2 mm (8") in height, measured from the ''finished system surface'')
<ol>
<li>should be avoided, particularly when designing a ''waterproofing system'' to support any type of ''overburden'', and
<li>are not recommended because of their propensity to overflow (water overflowing through a low opening is not covered by a '''''RoofStar Guarantee''''').
</li></ol>
<li>When a low-clearance opening is unavoidable or specified (i.e., to comply with Code for level access and egress),
<ol>
<li>the ''deck'' must be sloped away from the opening,
<li>the rough opening shall not be less than 101.6 mm (4") above the ''drainage plane'' and must be waterproofed in keeping with the requirements in [[#10.3.4.5. Doors, Windows, and Wall Openings | Article 10.3.4.5.]],
<li>the ''drainage plane'' must be free of obstructions and materials capable of displacing water,
<li>the low-clearance opening should be protected by an overhang wherever practical, to minimize water intrusion that occurs from wind-driven rain or from snow accumulation, and
<li>the opening must be protected by an ''overflow drain'', if drainage over the ''deck'' edge is blocked by a ''parapet'',
<ol>
<li>situated on the same roof area as the low-clearance opening,
<li>located at least 25.4 mm (1") below the elevation of the rough opening, and
<li>conforming to the spacing and capacities required by the "National Plumbing Code of Canada", Division B, [https://nrc-publications.canada.ca/eng/view/ft/?id=6e7cabf5-d83e-4efd-9a1c-6515fc7cdc71#%5B%7B%22num%22%3A310%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C250%2Cnull%5D Article 2.4.10.4.] (See also [[#11.1.3.1. Principles of Design | Article 11.1.3.1., "Principles of Design"]]).
</li></ol>
</li></ol>
<li>When the building interior transitions to an accessible surface through a flush door opening,
<ol>
<li>the design shall conform to the requirements in this Part, and to [[#14.1.3.11. Wearing Surfaces | Article 14.1.3.11.]], and
<li>the membrane installed over the rough opening sill must be protected from abrasion damage as described in [[#10.3.4.5. Doors, Windows, and Wall Openings | Sentence 10.3.4.5.(6)]] below.
</li></ol>
</li></ol>

===10.1.5. Reserved===
===10.1.6. Expansion and Control Joints===
(The requirements in [[#10.1.3. All Systems | Subsection 10.1.3., "All Systems"]], shall be read together with the following Articles)

====10.1.6.1. Expansion Joints====
(See [[Notes to GLW Standard#A-10.1.6.1.| Note A-10.1.6.1.]])

<ol>
<li>The design and placement of structural ''expansion joints'' is the responsibility of the ''Design Authority'', but they must be considered wherever
<ol>
<li>expansion or contraction joints are provided in the structural assembly,
<li>differential movement between structural components may occur (i.e., where a ''wall'' and the ''deck'' are separately supported, or
<li>seismic movement is anticipated.
</li></ol>
<li>The location of ''expansion joints'' must be clearly indicated on the drawings, drawn in detail, and included in the specifications.
<li>Proprietary elastomeric ''expansion joint'' systems are covered under the '''''RoofStar Guarantee Program''''' as an accessory to the accepted primary material and (except where the condition of Sentence 10.1.4.1.(6) applies) may be used at the drainage plane provided the expansion joint system is
<ol>
<li>manufactured with an EPDM-based core and flanges that can be fully bonded to the primary membrane,
<li>accepted for use in the '''''RoofStar Guarantee Program''''',
<li>compatible with the waterproofing membrane and acceptable to the membrane ''manufacturer'',
<li>designed and manufactured to accommodate building movements of at least 500% elongation at -40° C (-40° F) across its length and at all vulcanized points,
<li>factory-fabricated by means of vulcanization,
<li>manufactured as one piece, complete with all joints, details and connections,
<li>bonded with the primary membrane in a manner acceptable to the manufacturers of both the expansion joint and the membrane to which it will be bonded, and
<li>protected from damage, including foot traffic.
</li></ol>
<li>Field splicing of proprietary elastomeric expansion joints is permitted only when made with a machine acceptable to the expansion joint manufacturer.
<li>Elastomeric expansion joint systems that are not proprietary to the membrane manufacturer are not covered by a '''''RoofStar Guarantee''''' and must be built as a raised structure with a minimum height of 203.2 mm (8"), measured from the ''finished system surface''.
</li></ol>

====10.1.6.2. Control Joints (System Dividers)====
(See [[Notes to GLW Standard#A-10.1.6.2. | Note A-10.1.6.2.]]; also see [[#10.3.6.2. Control Joints (System Dividers) | Article 10.3.6.2.]])

<ol>
<li>The ''Design Authority'' is responsible
<ol>
<li>to determine the need for ''control joints'' (system dividers), and
<li>to specify their location and design.
</li></ol>
<li>The ''Design Authority'' must consider specifying ''control joints''
<ol>
<li>when a single system area exceed 61 m (approx. 200’) in length and the membrane is limited in its flexibility (consult the manufacturer for their recommendations),
<li>for buildings in climate zones with significant seasonal temperature swings,
<li>where an addition joins an existing building,
<li>where the ''deck'' type changes (i.e., steel transitions to wood),
<li>where insulation in the ''waterproofing system'' changes thickness,
<li>where the ''deck'' changes in elevation, and
<li>when interior heating conditions change.
</li></ol>
<li>Specified and detailed ''control joints'' should be located at the high points of the assembly, so that water drains away from both sides of the divider and is not impeded by it.
<li>''Control joints'' must be
<ol>
<li>constructed as a raised divider,
<li>sloped on the top face (this may be bi-directional, or only toward one side),
<li>enveloped with no fewer than two plies of sheet membrane flashing,
<li>at least 127 mm (5”) in height, measured from the ''finished system surface'', when covered with a metal cap flashing (this minimum may be reduced to 101.4 mm (4”) when the metal cap flashing is omitted), and
<li>waterproofed in keeping the requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]], together with the ''manufacturer’s'' published specifications for the detail.
</li></ol>
<li>Unless otherwise approved by the '''''Guarantor''''', ''control joints'' may be specified to divide a new ''system'' (addition) from existing ''systems'' (Ref. [[#1.1.4.5. Tie-ins, Additions, and Alterations to Existing Roofing | Article 1.1.4.5.]]).
</li></ol>

===10.1.7. Intersections with Other Systems===
(The requirements in [[#10.1.3. All Systems | Subsection 10.1.3., "All Systems"]], shall be read together with the following Articles)

====10.1.7.1. Intersections with Water-shedding Systems====

<ol>
<li>Intersections with ''water-shedding systems'' must be designed according to the requirements in [[#10.3.7.2. Intersections with Water-Shedding Roofs | Article 10.3.7.2.]]
</li></ol>

====10.1.7.2. Reserved====

===10.1.8. Alternative Approaches for Membrane Flashing===
(The requirements in [[#10.1.3. All Systems | Subsection 10.1.3., "All Systems"]], shall be read together with the following Articles)

====10.1.8.1. Specifying Hazard-reduction Strategies====

<ol>
<li>The ''Design Authority'' should consider alternatives to heat-applied materials when the application process involves Hot Work (Ref. [[#1.1.3.5. Hot Works | Article 1.1.3.5.]]) and the substrate to which they will be applied is combustible, or when nearby structures, openings, or materials, present a fire hazard; in the alternative, choose a suitable separation or overlay material as protection from open flame.
<li>Self-adhering or adhesive-applied membranes as alternatives to heat-applied membranes are acceptable to the '''''Guarantor''''' and must also be acceptable to the ''manufacturer''.
<li>The application of materials to a combustible surface, using a torch, is strictly prohibited (Refer to [[#10.3.8. Alternative Approaches to Sheet Membrane Flashing | Sub-section 10.3.8., "Alternative Approaches to Sheet Membrane Flashing"]], for application requirements).
</li></ol>

==Section 10.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===10.2.1. Material Properties===
====10.2.1.1. Flashing Membranes====

<ol>
<li>Sheet membranes used to flash the intersection of the system field and perimeter ''walls'' must conform to the membrane requirements found in [[#9.2.1.1. Membrane Composition, Thickness, and Selection | Article 9.2.1.1.]] of the related ''waterproofing roof'' Standard.
<li>When waterproofing a ''tall parapet'' above the primary membrane system is specified as part of the ''Contractor's'' scope of work (Ref. [[#10.1.4.3. Tall Parapets | Article 10.1.4.3.]] and [[#10.3.4.3. Tall Parapets | Article 10.3.4.3.]]), the membrane shall
<ol>
<li>be compatible with the primary membrane,
<li>be self-adhering,
<li>be declared suitable for the application by the ''manufacturer'' (see [[Notes to GLW Standard#A-10.2.1.1.(2)(3) | Note A-10.2.1.1.(2)(3)]]),
<li>possess properties consistent with the design and characteristics of the ''wall'' assembly,
<li>possess a high softening point and a minimum flow temperature of 87.7°C (190°F) (ASTM D5147, "Standard Test Methods for Sampling and Testing Modified Bituminous Sheet Material") and
<li>have a thickness no less than 1 mm (.040”).
</li></ol>
<li>Some membranes may be susceptible to damage from bird droppings, pet urine, and chemical contamination (oils, solvents, or any discharge from a mechanical unit), and therefore they should be protected using measures designed in consultation with the ''manufacturer''.
<li>Fleece-reinforced liquid membrane flashing systems must be accepted by the '''''Guarantor''''' and proprietary to, or accepted by, the ''manufacturer''.
</li></ol>

====10.2.1.2. Linear Metal Flashing====

<ol>
<li>''Linear metal flashing'' incorporated into perimeters and ''walls'' of the ''waterproofing system'' must conform to the materials and fabrication requirements in [[#Part 13 - Linear Metal Flashing | Part 13, "Linear Metal Flashing"]].
</li></ol>

====10.2.1.3. Reserved====
====10.2.1.4. Sealants====

<ol>
<li>Sealants applied to ''linear metal flashing'', where sheet membrane flashing is terminated, shall conform to the requirements in [[#13.2.1.4. Sealants | Article 13.2.1.4.]]
</li></ol>

===10.2.2. Securement Materials===
====10.2.2.1. Fasteners====

<ol>
<li>Where fasteners are used in the waterproofing system''
<ol>
<li>to secure waterproofing materials, they shall conform to the requirements in [[#3.2.2.1. Fasteners | Article 3.2.2.1.]] of the related ''waterproofing roof'' Standard.
<li>to secure ''linear metal flashings'', they shall conform to the requirements in [[#13.2.1.4. Sealants | Article 13.2.1.4.]]
</li></ol>
</li></ol>

==Section 10.3. Application==
===10.3.1. Guarantee Term Requirements===
====10.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====10.3.1.2. Reserved====

===10.3.2. All Systems===
====10.3.2.1. Substrate Preparation====

<ol>
<li>All wall surfaces to which waterproofing materials must be installed (including Concrete Masonry Unit (CMU)) shall be
<ol>
<li>prepared in like manner to the ''deck'' (Ref. [[#9.3.2.1. Preparation of Substrate | Article 9.3.2.1.]]) and declared suitable by the ''manufacturer'', or
<li>covered with a RoofStar-accepted overlay panel conforming to the material requirements in [[#5.2.1.3. Overlays for Walls | Article 5.2.1.3.]] and installed to conform to [[#5.3.2.5. Support, Arrangement, and Securement of Wall Overlays | Article 5.3.2.5.]]
</li></ol>
<li>Wherever the primary membrane will be applied, gaps or cracks that exceed 1.59 mm (1/16”) in width must be reinforced prior to the application of the membrane using the ''manufacturer’s'' proprietary reinforcement material.
</li></ol>

====10.3.2.2. Material Preparation====

<ol>
<li>Membranes preparation shall conform to the general and specific requirements of Article 10.3.2.2. in the applicable RGC Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#10.3.2.2._Material_Preparation Article 10.3.2.2.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#10.3.2.2._Material_Preparation Article 10.3.2.2.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>SBS-modified bitumen membrane flashing shall be prepared following the requirements in the "RGC Standard for SBS-modified Bitumen Membrane Roofs".
</li></ol>

====10.3.2.3. General Application Requirements for Perimeters and Walls====

<ol>
<li>The general application requirements for perimeters and walls shall conform to the general and specific requirements of Article 10.3.2.3. in the applicable RGC Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#10.3.2.3._General_Application_Requirements_for_Perimeters_and_Walls Article 10.3.2.3.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#10.3.2.3._General_Application_Requirements_for_Perimeters_and_Walls Article 10.3.2.3.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>Cold joints between concrete pours, at transitions between horizontal ''decks'' and vertical ''walls'' below grade, shall be sealed and covered with waterproofing membrane flashing that is
<ol>
<li>compatible with any foundation or ''wall'' waterproofing or damp proofing, and
<li>extends at least 203.2 mm (8”) past any joints between the ''deck'' and a ''wall''.
</li></ol>
<li>Whenever materials at ''deck'' and below grade ''wall'' transitions are not compatible with one another, sealants and mechanically attached termination bars are acceptable, to create a watertight lap a minimum 203.2 mm (8") in width.
<li>When damp proofing of below-grade ''walls'' is completed before waterproofing of the structural slab at grade, or the backfill against blind-side waterproofing prevents a below-grade seal by the ''Contractor'', a waterproofing membrane-compatible membrane should be installed by the damp proofing contractor and extended onto the horizontal plane of the slab, to permit a positively draining, watertight seal.
</li></ol>
</li></ol>

====10.3.2.4. Protection of Membranes====

<ol>
<li>All installed membranes must be protected from splashed or dripped primer (applicable to all trades).
<li>Membrane flashing must be protected from damage caused by UV radiation, foot traffic, or shifting coverings, using a ''linear metal flashing'' (i.e., base flashing) or other methods acceptable to the '''''Guarantor'''''.
<li>Protection materials shall be installed as required in [[#9.3.2.7. Protection of Membranes | Article 9.3.2.7.]]
<li>When an integrity scan is not required because the conditions in [[#1.1.3.3. Membrane Integrity Testing | Article 1.1.3.3.]] have been satisfied, the ''Contractor'' shall nevertheless protect installed field membranes and membrane flashing, immediately after installation, with RoofStar-accepted membrane protection materials.
</li></ol>

===10.3.3. Additional Requirements for Membrane Flashing===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.3.1. Membrane Flashing for SBS-modified Bituminous Sheet Membranes====

<ol>
<li>The application of permitted SBS-modified bituminous sheet membrane flashing shall conform to the general and specific requirements of Subsection 10.3.3. in the applicable RGC Standard for roofs, and shall be read together with Subsection 10.3.2. in the same Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#10.3.3._Additional_Requirements_for_Membrane_Flashing Subsection 10.3.3.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#10.3.3._Additional_Requirements_for_Membrane_Flashing Subsection 10.3.3.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
</li></ol>

===10.3.4. Perimeter Details, Walls, and Openings===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.4.1. Additional Requirements for Parapets, Walls, and Openings in Walls====

<ol>
<li>The additional application requirements for waterproofing materials at the perimeter, on walls, and at openings in walls, shall conform to the general and specific requirements in Articles 10.3.4.1., 10.3.4.3, and 10.3.4.5. of Subsection 10.3.4. in the applicable RGC Standard for roofs and shall be read together with Subsection 10.3.2. in the same Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#10.3.4._Perimeter_Details.2C_High_Walls.2C_and_Openings Subsection 10.3.4.] in the RGC Standard for SBS-modified Bituminous Membrane Roofs.
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#10.3.4._Perimeter_Details.2C_High_Walls.2C_and_Openings Subsection 10.3.4.] in the RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs.
</li></ol>
</li></ol>

===10.3.5. Reserved===
===10.3.6. Expansion and Control Joints===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.6.1. Expansion Joints====
(See [[#10.1.6.1. Expansion Joints | Article 10.1.6.1.]])

<ol>
<li>When proprietary elastomeric ''expansion joint'' systems in the ''drainage plane'' are specified, the bond between the sheet membrane flashing and the ''expansion joint'' system must be acceptable to both the ''manufacturer'' and the supplier of the expansion joint system (Ref. [[#10.1.6.1. Expansion Joints | Article 10.1.6.1.]] for design requirements).
<li>Backer rods, insulation, or any other materials installed inside the cavity below the expansion joint may be installed by the ''Contractor'' but are not considered part of the system and therefore are excluded from coverage under a '''''RoofStar Guarantee'''''.
<li>Field splicing of proprietary elastomeric ''expansion joints'' is permissible only when made with a machine acceptable to the expansion joint manufacturer.

</li></ol>

====10.3.6.2. Control Joints (Roof Dividers)====

<ol>
<li>''Control joints'' must be waterproofed in keeping the requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]], together with the ''manufacturer’s'' published specifications for the detail.
</li></ol>

===10.3.7. Intersections with Other Systems===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.7.1. Compatibility of Materials====

<ol>
<li>Where a ''waterproofing system'' intersects with a different system, materials must be
<ol>
<li>compatible with each other, or
<li>must be separated from contact by an intermediate separation layer.
</li></ol>
</li></ol>

====10.3.7.2. Intersections with Water-Shedding Systems====
(See [[Notes to GLW Standard#A-10.3.7.2. | Note A-10.3.7.2.]])

<ol>
<li>When a ''waterproofing system'' transitions up a slope and underlaps a ''water-shedding system'',
<ol>
<li>sheet membrane flashing must extend up the ''water-shedding roof system'' slope at least
<ol>
<li>152.4 mm (6”), plus at least 76.2 mm (3”) for the overlap by the ''water-shedding system'', when measured vertically from the maximum water level, and
<li>304.8 mm (12”) plus at least 76.2 mm (3”) for the overlap by the ''water-shedding system'', when measured vertically from the maximum water level, in regions with typical heavy snow,
</li></ol>
<li>the termination of the ''waterproofing system'' sheet membrane flashing on the slope must be mechanically secured, separately from the ''water-shedding system'', and
<li>the overlapping adjoining system materials must conform to the requirements for the specific ''water-shedding system''.
</li></ol>
</li></ol>
</li></ol>

====10.3.7.3. Reserved====

===10.3.8. Alternative Approaches to Sheet Membrane Flashing===

====10.3.8.1. General====

<ol>
<li>When field membranes or flashing plies are heat-welded, or when construction sequencing requires strategies for mitigating fire risk, the ''Contractor'' is responsible to assess risks and should consider the means and methods in [[#10.3.8. Alternative Approaches to Sheet Membrane Flashing | Subsection 10.3.8.]] of the "RGC Standard for SBS-modified Bitumen Membrane Roofs.":
</li></ol>

<hr>

<div id=PART_11></div>

=Part 11 - Drainage=
<div id="DRAIN_DESIGN"></div>
==Section 11.1. Design==
===11.1.1. General===
====11.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====11.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Bi-Level Drain'' means a drain with two inlets, each at a different elevation; these drains are typically used on roofs supporting ''overburden'' and are not to be used as an ''overflow''.
<li>''Drain leader'', as used in this Standard, means "a pipe that is installed to carry ''storm water'' from a ''waterproofing assembly'' to a ''storm building drain'' or ''sewer'' or other place of disposal” ("British Columbia Plumbing Code", Division A, [https://free.bcpublications.ca/civix/document/id/public/bcpc2018/bcpc_2018dap1s14 Article 1.4.1.2., "Defined Terms"]).
<li>''Flanged insert drain'' means a ''primary drain''
<ol>
<li>with a flat, broad flange that encircles, and is manufactured from the same material as, the drain opening or bowl,
<li>that is spun or hot-welded (not cast),
<li>that typically is secured to the ''waterproofing assembly'' with screw-type mechanical fasteners, and
<li>that is manufactured with a short length of drain pipe ("drain stem"), which is inserted into a ''drain leader'' and sealed against back-flow using a compression seal.
</li></ol>
<li>''Overflow drain'' ("overflow") means a ''secondary drain''
<ol>
<li>that serves as a safeguard when ''primary drains'' fail, and
<li>which may be located in the ''waterproofing system'' field (for example, as a secondary drain) or at the perimeter of the ''waterproofing assembly''.
</li></ol>
<li>''Primary drain'' means the primary means the primary collector of storm water for discharge, typically into a ''drain leader''.
<li>''Drain'' means a fitting or device that is installed in a ''waterproofing assembly'' or roof to permit storm water to discharge into a ''drain leader''. (adapted from the "British Columbia Plumbing Code", Division A, [https://free.bcpublications.ca/civix/document/id/public/bcpc2018/bcpc_2018dap1s14 Article 1.4.1.2., "Defined Terms"]).
<li>''Scupper drain'' ("scupper"), which is primarily used on roofs, means an open or closed drain that conveys water laterally from one area of a ''project'' to another, or from the ''project'' directly to the exterior of the building.
<li>''Secondary drain'' means a drain connected to a separate drainage system, typically situated at a higher elevation than a ''primary drain''. An ''overflow drain'' is a type of ''secondary drain''.
</li></ol>
</li></ol>

===11.1.2. Guarantee Term Requirements===
====11.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====11.1.2.2. Reserved====

====11.1.2.3. Reserved====

===11.1.3. All Systems===
====11.1.3.1. Principles of Design====

<ol>
<li>The ''Design Authority'' is responsible for the design of ''project'' drainage and ''continuity'' of ''control layers'', where these intersect with any part of the designed drainage system (Ref. [[#3.1.5.1. Securement against Specified Wind Loads | Article 3.1.5.1.]]; also see [[#6.1.3.2. Continuity of Control Layers | Article 6.1.3.2.]]).
<li>Notwithstanding that most ''waterproofing assemblies'' drain over an edge at grade, when the design requires mechanical drainage, the ''Design Authority'' must design the drainage system with ''drains'' and ''overflows'' sized to accommodate the anticipated precipitation for the building.
<li>Whereas the Building Code may not require the inclusion of ''overflows'' in all circumstances, and the RGC Standards require ''overflows'' in some locations (e.g., in membrane-lined gutters), the incorporation of properly sized and located overflows is strongly encouraged (Also see [[#11.1.4.2. Scuppers and Overflows | Article 11.1.4.2.]]).
<li>The size (flow rate) of ''drains'' and ''overflows'' must be determined using the "British Columbia Building Code" and "British Columbia Plumbing Code", with attention given to both average and large rainfall events (for rainfall capacities, refer to the [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbacr2 "British Columbia Building Code", Div. B, Appendix C, "Table C-2"], which lists rainfall loads using specific reference locations throughout the province (See [[#11.1.3.2. Roof Drain Function and Location | Articles 11.1.3.2.]] and [[#11.1.4.2. Scuppers and Overflows | 11.1.4.2.]] for function and location).
<li>The ''Design Authority'' should coordinate the various disciplines (including, without limitation, mechanical (plumbing) and structural engineers) to calculate proper flow rates, head pressure, and structural supports, in anticipation of significant, short-duration rain events; consideration should be given to various design elements (listed without limitation)
<ol>
<li>''project'' slope (more slope theoretically increases drainage and lessens live loading from rainfall) (Ref. [[#2.1.3.1. General Requirements for Roof Slope | Article 2.1.3.1., "General Requirements for Roof Slope"]]),
<li>rainfall rates for primary and overflow drainage,
<li>''primary'' and ''overflow drain'' capacities,
<li>hydraulic head (pressure), and
<li>the location of the ''drainage plane'' (the ''drainage plane'' is not necessarily the same as the ''finished system surface'', and the location of the ''drainage plane'' may affect the determination of live loads, which should be accounted for as part of drainage design).
</li></ol>
<li>When a ''waterproofing assembly'' or ''water-shedding assembly'' is designed to drain off an edge, water may drain freely or be collected by means of an external or membrane gutter (See [[#11.1.4.3. Membrane Gutters | Article 11.1.4.3.]]) and drained onto a lower roof assembly.
<li>When a ''waterproofing system'' is fully or partially replaced, all flanged drains, ''scuppers'', and ''overflows'', together with internal drain-to-pipe compression seals, and seals exposed to water or ultraviolet light, must be replaced.
<li>If a flow control is present in an existing cast ''drain leader'', the flow control should be reinstalled.
<li>''Waterproofing assemblies'' that support a ''overburden'' or are secured with ballast must be designed to incorporate a ballast guard that surrounds the drain and promotes proper drainage.
</li></ol>

====11.1.3.2. Drain Function and Location====

<ol>
<li>''Drains'' must be used only for draining water.
<li>The use of ''bi-level drains'' with adequate openings for both surface and subsurface drainage are mandatory for all inaccessible ''waterproofing systems'' that utilize interior drainage systems with low permeable wearing courses (poured concrete, bricks, unit masonry and stone set in mortar beds).
<li>''Drains'' on new construction ''projects'' must be located at least 457.2 mm (18") away from any adjacent ''drain'', penetration, upstand, edge, or ''wall'' (the separation space is measured between openings, excluding the flange), but this requirement does not apply to ''overflow drains'', ''scupper drains'', and membrane gutters (Ref. [[#11.3.3.7. Scuppers and Overflows | Article 11.3.3.7.]] for minimum requirements applicable to ''scuppers'' and ''overflows'').
<li>Notwithstanding the requirements in Sentence (1), a cast iron ''roof drain'' with a sump receiver must be placed well away from any interference with drain securement.
<li>When a ''waterproofing system'' is replaced and existing ''drains'' do not comply with the spacing requirements in this Part, the ''Design Authority'' must submit a drawn detail for a review by the ''''''Guarantor'''''; the detail must incorporate the following requirements and principles, together with requirements in [[#11.3.3. Drains | Subsection 11.3.3.]]:
<ol>
<li>''Wall'' membrane flashings must not terminate under the clamping ring of a cast drain.
<li>The clamping ring of a cast drain must be fully seated to ensure the drain will function properly.
</ol></li>
</ol></li>

===11.1.4. Drains and Membrane Gutters===
(The requirements for [[#11.1.3. All Systems | Subsection 11.1.3., "All Systems"]], shall be read together with the following Articles)

====11.1.4.1. Cast Iron Roof Drains====

<ol>
<li>Cast iron ''drains'' may be
<ol>
<li>cast into a concrete slab, or
<li>secured with an under-deck clamp when the ''deck'' is steel.
</li></ol>
<li>Only cast iron ''drains'', and existing external couplers used to connect ''drains'' to leaders, may be re-used for ''waterproofing system'' replacement ''projects''.
</li></ol>

====11.1.4.2. Scuppers and Overflows====

<ol>
<li>A ''scupper drain'' may be used as a ''primary drain'', a ''secondary drain'', or as an ''overflow''.
<li>Overflows, which are emergency stormwater discharge outlets installed to activate when ''primary drains'' are blocked and to prevent structural damage,
<ol>
<li>should be located around the perimeter of a ''waterproofing assembly'', through ''parapets'' (recommended), but
<li>may be a ''secondary drain'' in the field provided it is plumbed in keeping with the “British Columbia Plumbing Code”, Div. B, Subsection 2.4.6 and Article 2.4.10.4. [[Notes to GLW Standard#A-11.1.4.2. | (See Note A-11.1.4.2.)]].
</li></ol>
<li>Where no ''overflows'' are specified, the building structure should be designed to carry the total load of water collected on the ''waterproofing assembly'', in the event of ''primary drain'' failure.
<li>''Overflows'' located at the perimeter of the roof must be
<ol>
<li>designed as open-wall ''scuppers'' for ''parapets'' measuring 152.4 mm (6”) or less in height (Ref. Construction Detail [[SBS Open-wall Scupper Drain | "Open-wall Scupper Drain"]]), or
<li>designed around the principles of a through-wall ''scupper'' when ''parapets'' are higher than 152.4 mm (6”) (Ref. Construction Detail [[SBS Through-wall Scupper Drain | "Through-wall Scupper Drain"]]), and (irrespective of design) shall be
<ol>
<li>located no higher than 101.6 mm (4”) above the ''drainage plane'' at the roof drain (See '''Figure 11.1.4.2.-A'''; also see [[Notes to GLW Standard#A-11.1.4.2. | Note A-11.1.4.2.]]),
<li>installed at least 25.4 mm (1”) lower than the lowest elevation of a door, window, or other low-clearance opening, to prevent water intrusion,
<li>situated so that they freely and visibly discharge storm water,
<li>protected with a ballast guard when the ''overflow'' is located below the ''finished system surface'', and
<li>specified to conform to the spacing and capacities required by the "National Plumbing Code of Canada", Division B, [https://nrc-publications.canada.ca/eng/view/ft/?id=6e7cabf5-d83e-4efd-9a1c-6515fc7cdc71#%5B%7B%22num%22%3A310%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C250%2Cnull%5D Article 2.4.10.4.] (See also [[#11.1.3.1. Principles of Design | Article 11.1.3.1., "Principles of Design"]]).
</li></ol>
</li></ol>
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 11.1.4.2.-A Overflow location relative drainage plane at primary drain''' Forming Part of Article 11.1.4.2. (Click to expand illustration)
|-
| [[File:Part 11 - Illustration - Figure 11.1.4.2.-A.png|link=https://rpm.rcabc.org/images/5/5b/Part_11_-_Illustration_-_Figure_11.1.4.2.-A.png | 600 px]]
|}
</li></ol>

====11.1.4.3. Reserved====

====11.1.4.4. Drains in Planters====

<ol>
<li>''Drains'' designed for structural planters must conform to the requirements in [https://rpm.rcabc.org/index.php?title=VRA_Standard#6.1.3.2._Planter_Drainage Article 6.1.3.2.] of the “RGC Standard for Vegetated Roofs”.
</ol></li>

==Section 11.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===11.2.1. Material Properties===
====11.2.1.1. General Requirements====

<ol>
<li>Except for cast iron ''drains'', which are usually supplied and installed by others, only new ''drains'' and penetration flashings listed in [[Division_C | Division C]] may be used.
<li>All ''drains'' and overflows must conform to CSA ASME A112.6.4-2022/CSA B79.4-2022, "Roof, deck, and balcony drains", unless otherwise permitted by the '''''Guarantor'''''.
<li>Reuse of any penetration flashing or ''drain'' (except serviceable cast iron ''drains'') is prohibited and may void the ''Guarantee'' (See Division A, [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Article 3.2.1.2.]]).
<li>When an existing cast iron ''drain'' is serviceable and reusable, all broken threaded rods, clamping rings, and drain strainers (“baskets”) must be replaced with new components suitable to the specific ''drain''.
<li>Where ''drains'' or ''overflows'' are fabricated from stainless steel, the stainless steel shall be Grade 316L and shall conform to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”.
<li>Sheet membranes used to flash (strip in) ''drains'' shall be reinforced with polyester or a composite scrim, but in any event must conform to the membrane requirements found in [[#9.2.1.1. Membrane Composition, Thickness, and Selection | Article 9.2.1.1.]]
</li></ol>

====11.2.1.2. Drains and Scuppers====
(See [[Notes to GLW Standard#A-11.2.1.2. | Note A-11.2.1.2.]])

<ol>
<li>All ''drains''
<ol>
<li>must be designed and manufactured for ''waterproofing system'' applications only, and shall not be floor drains, and
<li>shall be made so that the waterproofing membrane can be sealed to the drain body or bowl (the membrane seal must not rely solely on a clamping ring).
</li></ol>
<li>Cast iron ''primary drains''
<ol>
<li>must be supplied with a clamping ring, drain strainer, and ballast guard, and
<li>must be installed by the trade supplying the ''drain''.
</li></ol>
<li>When the deck is steel, cast iron ''drains'' should be supplied with an under-deck clamp that is secured separately from the clamping ring and strainer.

<li>Cast iron planter ''drains'' must be supplied with a perforated riser that is proprietary to the drain manufacturer (See the “RGC Standard for Vegetated Roofs”, [https://rpm.rcabc.org/index.php?title=VRA_Standard#6.1.3.2._Planter_Drainage Article 6.1.3.2]).
<li>Cast iron ''scupper drains'' must be
<ol>
<li>supplied with a clamping strainer, and
<li>designed with cast, enclosed (captive) strainer bolt receivers (drains with bolts exposed on the back side of the drain body are not acceptable).
</li></ol>
<li>Lead sheet flashing, when specified, must be sized to extend past the drain bowl by at least 152.4 mm (6”), and must have a weight of at least 15 kg/m2 (3 lb/ft2).
<li>All ''primary'' ''flanged insert drains'' (drains with a stem that inserts into a drain leader)
<ol>
<li>must be manufactured with a hot-welded or seamless flange at least 101.6 mm (4”) wide (measured from the outer edge of the drain opening),
<li>must be hot-welded at the joints between the bowl/flange and drain stem, and
<li>must be installed with a clamping ring.
</li></ol>
<li>''Primary flanged drains'' (insert drains or scuppers) that connect with plumbing inside the building (“internal” drains) must be constructed of
<ol>
<li>copper (min. weight: 24 oz. sheet copper; min. thickness: 20-gauge, or 0.889 mm (0.035”)),
<li>aluminum (min. thickness: 12-gauge, or 2.053 mm (0.08081”)), or
<li>stainless steel, Grade 316L (min. thickness: 18 gauge, or 1.27 mm (0.050”)).
</li></ol>
<li>''Primary flanged drains'' (insert drains or scuppers) that drain directly to the exterior of the building (“external” drains) must be constructed of
<ol>
<li>copper (min. weight: of 16 oz.; min. thickness: 24-gauge, or 0.559 mm (0.022”)), or
<li>aluminum (min. thickness: 20-gauge material, or 0.812 mm (0.03196”)).
</li></ol>
<li>All ''scupper drains'' (open, or closed (boxed)) must be
<ol>
<li>manufactured with welded seams and joints,
<li>designed to extend past the outside face of the wall, and
<li>fabricated from
<ol>
<li>copper (min. weight: 16 oz.; min. thickness: 24-gauge, or 0.559 mm (0.022”)), {{strike| or || 2025-May-29 }}
<li>aluminum (min. thickness: 20-gauge material, or 0.812 mm (0.03196”)), or
<li>stainless steel, Grade 316L (min. thickness: 18 gauge, or 1.27 mm (0.050”)).
</li></ol>
</li></ol>
<li>In addition to the general requirements for ''scupper drains'', closed (boxed) ''scupper drains'' must also be
<ol>
<li>fully enclosed on four sides, for through-wall applications,
<li>fabricated with a drip edge at the bottom outside edge of the ''drain'' to deflect overflow water away from the building, and
<li>fitted with an overflow opening on the outside face of the ''scupper'',
<ol>
<li>equal in capacity to the main ''drain leader'' opening, and
<li>at least 38.1 mm (1 ½”) lower than the top surface of the ''scupper drain''.
</li></ol>
</li></ol>
<li>''Overflow drains''
<ol>
<li>must be manufactured from copper or aluminum conforming to the material requirements in Sentence (9) above, but
<ol>
<li>may be manufactured from ferrous metals (See [[#Section 13.2. Materials |Section 13.2.]]), and
<li>may be manufactured from stainless steel, but the steel shall be Grade 316L stainless steel (min. thickness: 20 gauge, or 0.9525 mm (0.0375”)), and
</li></ol>
<li>must have a hot-welded or seamless flange at least 101.6 mm (4”) wide when measured from the outer edge of the drain opening.
</li></ol>
<li>All ''drains'' utilized in a ''roof assembly'' that includes gravel ballast or growing media (soil) must be supplied with the drain manufacturer's proprietary primary drain strainer and secondary stainless-steel ballast guard, but when one is not provided, a custom-fabricated guard may be used provided the guard
<ol>
<li>is fabricated from 20-gauge stainless-steel (0.9525 mm or 0.0375”),
<li>incorporates 6.35 mm (1/4”) perforations, and
<li>equals or exceeds the height of the ''finished system surface''.
</li></ol>
</li></ol>

====11.2.1.3. Reserved====

====11.2.1.4. Fasteners====

<ol>
<li>Mechanical fasteners used to secure ''scuppers'' and ''overflows'' must be
<ol>
<li>properly sized in accordance with ''waterproofing system'' securement requirements (See [[#Part 3 - Securing the Roof Assembly | Part 3]]), and shall be
<ol>
<li>self-drilling purpose-made screws manufactured with deep, recessed heads.
</li></ol>
</li></ol>
</li></ol>

====11.2.1.5. Sealants====

<ol>
<li>Sealants must be manufactured by, or acceptable to, the ''manufacturer''.
<li>Compression sealants must be formulated to provide waterproofed seals under compressive loads.
</li></ol>

====11.2.1.6. Liquid Membrane Flashing====

<ol>
<li>Only a RoofStar-accepted reinforced two-component catalyzed polymethyl methacrylate (PMMA) liquid membrane flashing system may be used on the water plane to flash ''drains'', ''scuppers'', and ''overflows''.
</ol></li>

==Section 11.3. Application==
===11.3.1. Guarantee Term Requirements===
====11.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====11.3.1.2. Reserved====

===11.3.2. All Systems===
====11.3.2.1. Condition and Suitability of Drains====

<ol>
<li>All clamping rings and strainers must be unbroken, properly seated, and fully secured.
</li></ol>

====11.3.2.2. Location and Spacing of Drains====
(See also [[#Section 11.1. Design | Section 11.1., "Design"]])

<ol>
<li>''Drains'' for new construction ''projects'' must be located at least 457.2 mm (18") away from any adjacent ''drain'', penetration, upstand, edge, or ''wall'' (the separation space is measured between openings, excluding the flange).
<li>The 457.2 mm (18") spacing requirement for ''drains'' does not apply to ''overflows'', ''scupper drains'', and drains used in membrane gutters.
<li>''Drains'' and cap membrane seams must be offset from each other at least 304.8 mm (12”), measured from the edge of the ''drain''.
</li></ol>

====11.3.2.3. Drain Protection Against Blockage====

<ol>
<li>All ''drains'' must be supplied and installed with a secured strainer to prevent debris from blocking the ''drain''.
<li>When a ''waterproofing assembly'' supports ''overburden'' or is secured with ballast, drains must be installed together with a surrounding ballast guard that promotes water flow.
<li>When the ''overburden'' is landscaping, ''drains'' must be protected by both a stone/ballast guard and a ''separation zone'', as required in [https://rpm.rcabc.org/index.php?title=VRA_Standard#5.1.3.3._Separation_of_vegetation_from_roofing_details {{hilite |Article 5.1.3.3.] of the "RGC Standard for Vegetated Roofs".
</ol></li>

====11.3.2.4. General Installation Requirements====

<ol>
<li>''Drains'' must be
<ol>
<li>secured to the ''supporting deck'' structure, or to blocking, and
<li>properly detailed for ''continuity'' with specified ''control layers''.
</ol></li>
<li>''Drains'' must be flashed using the primary membrane system or accessories acceptable to the ''manufacturer'' and the '''''Guarantor'''''.
<li>When fleece-reinforced liquid membrane systems are used to flash drains, only a RoofStar-accepted reinforced two-component catalyzed polymethyl methacrylate (PMMA) may be used on the ''drainage plane'' to flash ''drains'', ''scuppers'', and ''overflows''.
</ol></li>

===11.3.3. Drains===
(The requirements for [[#11.3.2. All Systems | Subsection 11.3.2., "All Systems"]], shall be read together with the following Articles)

====11.3.3.1. Reserved====

====11.3.3.2. General Requirements for Cast Iron Drains====

<ol>
<li>Cast iron ''drains'' must be installed by the plumbing/mechanical trade.
<li>When cast iron ''drains'' are used and the ''deck'' is steel, a sump receiver and under-deck clamp must be provided and installed by the trade supplying the drain.
<li>Drain extensions for cast iron roof drains should be avoided.
<li>Existing flow controls removed during ''project'' construction should be reinstalled; however, if the replacement ''waterproofing assembly'' will support landscaping, the drainage design must conform to the requirements set out by the '' Design Authority''.
<li>''Drains'' shall be connected to internal piping by mechanical compression type seals only; the use of "O"-rings, mastics and caulking, is not acceptable for sealing to internal piping.
<li>All cast iron ''drains'' must be
<ol>
<li>new or clean,
<li>unbroken (this also applies to clamping rings, threaded rod, strainers, and ballast guards), and
<li>flashed in accordance with the ''manufacturer's'' published instructions, or to the requirements published in this Part, whichever are greater.
</li></ol>
<li>The ''continuity'' of air and vapour ''control layers'' must be maintained, where the controls are specified.
</li></ol>

====11.3.3.3. Cast Iron Drains Installed with Lead Flashing====

<ol>
<li>All cast iron ''drains'' installed with lead flashing shall conform to the means and methods described and required in [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#11.3.3.3._Cast-iron_Drains_Installed_with_Lead_Flashing Article 11.3.3.3.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs" (lead flashing is not used with cast-iron drains installed in hot fluid-applied rubberized asphalt membranes).
</li></ol>

====11.3.3.4. Cast Iron Drains Installed with Membrane Flashing====

<ol>
<li>All cast-iron drains installed with membrane flashing shall conform to the means and methods described and required in the applicable RGC Standard for roofs:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#11.3.3.4._Cast-iron_Drains_Installed_with_Membrane_Flashing Article 11.3.3.4.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#11.3.3.4._Cast-iron_Drains_Installed_with_Membrane_Flashing Article 11.3.3.4.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>When the waterproofing membrane is SBS,
<li>the clamping ring must be set in and bolted down to a warm, newly applied membrane, to ensure a good seal, or
<li>the sheet membrane may be sealed to the drain bowl with the application of a 2-component fleece-reinforced PMMA liquid flashing system that overlaps the sheet membrane at least 200 mm (8”) onto the drain flange and into the exposed drain bowl by no less than 50.8 mm (2”).
</li></ol>
</li></ol>

====11.3.3.5. Cast-iron Roof Drain Retrofitting (Replacement Roofing)====

<ol>
<li>Retrofitting a cast iron ''drain'' is not recommended, but when retrofitting is unavoidable (i.e., the ''drain'' has deteriorated to the extent that it cannot receive a new waterproofing membrane, and removal is not possible),
<ol>
<li>remove any broken parts and debris,
<li>clean and prepare all surfaces of the ''drain'' that will receive new waterproofing materials,
<li>seal any cracks in the bowl with a 2-component fleece-reinforced PMMA liquid flashing system, applied to the inside of the drain bowl, ensuring that the flashing system extends at least 50.8 mm (2”) on either side of the crack,
<li>connect the retrofit insert to internal leaders using only an external coupling (unless impractical - see alternative requirements below), and
<li>follow the requirements set out in [[#11.3.3.2. General Requirements for Cast Iron Roof Drains | Article 11.3.3.2.]]
</li></ol>
<li>When an internal compression seal is used out of necessity to connect a retrofit ''drain'' to an existing ''drain leader'',
<ol>
<li>the joint must be properly prepared to ensure the joined surfaces are clean, smooth, and uniform, and
<li>honing out the cast pipe may be required.
</li></ol>
<li>In the absence of a clamping collar, the retrofit insert ''drain'' must be sealed to the primary membrane with another method acceptable to the ''manufacturer'' and the '''''Guarantor''''' (Ref. [[#11.2.1.6. Liquid Membrane Flashing | Article 11.2.1.6.]]).
</li></ol>
</li></ol>

====11.3.3.6. Flanged Insert-type Roof Drains====

<ol>
<li>Flanged insert drains installed with SBS-modified bituminous sheet membranes must conform to the requirements in [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#11.3.3.6._Flanged_Insert-type_Roof_Drains Article 11.3.3.6.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
</li></ol>

====11.3.3.7. Scuppers and Overflows====

<ol>
<li>When ''scuppers'' and ''overflows'' are used, their installation shall conform to the means and methods described and required in the applicable RGC Standard for roofs:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#11.3.3.7._Scuppers_and_Overflows Article 11.3.3.7.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#11.3.3.7._Scuppers_and_Overflows Article 11.3.3.7.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
</li></ol>

====11.3.3.8. Reserved====

<hr>
<div id=PART_12></div>

=Part 12 - Penetrations and Curbs=
==Section 12.1. Design==
===12.1.1. General===
====12.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====12.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===12.1.2. Guarantee Term Requirements===
====12.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====12.1.2.2. Reserved====

===12.1.3. All Systems===
====12.1.3.1. General Requirements for Penetrations====

<ol>
<li>The use of curbs conforming to [[#12.1.3.4. Curbs, Sleepers, and Equipment Pads | Article 12.1.3.4.]] is required for mounting for all venting units and equipment.
<li>Where openings or penetrations pass through the ''waterproofing assembly'' (i.e., for mechanical or electrical services), the specification and detail drawings shall
<ol>
<li>provide direction for ''continuity'' of ''control layers'', where these layers intersect with any opening or penetration, and
<li>require a ''curb'' or an acceptable penetration flashing to enclose and seal each opening in the assembly.
</li></ol>
<li>Each penetration (except for clustered or bundled electrical cables) must be flashed separately from others.
<li>Single or bundled electrical cable penetrations must be flashed with a suitable goose-neck flashing, fitted with a weather head.
<li>Penetration flashings must be
<ol>
<li>new,
<li>suitable for the type of penetration,
<li>sized to elevate the open end of the flashing or weather-head at least 203.2 mm (8”) above the ''finished system surface'', and
<li>properly sized and fitted around the penetration to permit a seal (gaps between the penetration and the inside of the flashing shall be no more than 12.7 mm (1/2"), or
<li>of sufficient height to be made water-tight with a site-fabricated membrane seal fashioned to enclose the gap between the flashing and the penetration (see '''Figure 12.3.2.1.-A'''); the application of liquid sealant around the penetration in an open-top flashing is not acceptable.
</li></ol>
<li>Notwithstanding the minimum height requirement for flashings in Sentence (5), when services penetrate the ''waterproofing assembly'' and must be concealed below the ''finished system surface'', the flashing for the penetration shall be no less than 101.6 mm (4”) in height and the penetration shall be sealed to the flashing, but a leak through the penetration or its seal with the flashing is not covered by a '''''RoofStar Guarantee'''''.
<li>Hollow steel penetrations and structures that penetrate the ''waterproofing system'' above a conditioned space should be filled with spray foam and topped with pourable sealant.
<li>Hollow steel penetrations and structures that are manufactured with vent holes (necessary during galvanizing) must be fitted with lead plugs in the holes to prevent water ingress (plugs should be cut flush with the outside face of the penetration).
<li>Penetration flashings
<ol>
<li>that are or may be prone to condensation should be factory-insulated, and
<li>should be selected for their ability to inhibit the intrusion of vermin and insects into the roof assembly and building interior.
</li></ol>
<li>Suitable flashings must be specified for penetrations that are expected to expand, contract, or otherwise move.
<li>Cylindrical ("pipe-type") penetrations must be sealed with
<ol>
<li>the ''manufacturer’s'' proprietary pre-molded flashing that utilize mechanical clamps,
<li>a 2-part site-fabricated or proprietary flashing with a removable inspection/access cap (Ref. Construction Detail [[SBS 2-Part Retrofit Flashing (Cable Penetration) | "2-Part Retrofit Flashing (Cable Penetration)"]]), or
<li>roof ''curbs'' fitted with customized metal hoods or square-to-round metal flashing.
</li></ol>
<li>Aluminum or copper flashings for penetrations may be located at the ''drainage plane'' in any assembly type.
</li></ol>

====12.1.3.2. Galvanized Penetration Flashings====

<ol>
<li>The use of galvanized flashings and vents is not recommended, but when they are specified, they shall be elevated on ''curbs'' no less than 203.2 mm (8") in height above the ''finished system surface''.
</li></ol>

====12.1.3.3. Separation Between Details====

<ol>
<li>Penetrations on new construction ''projects'' must be separated from other penetrations, drains, curbs, walls, or changes in plane so that the space between flashings for these details is at least 304.8 mm (12") (this is measured between openings or the edge of a detail and excludes the flashing flange); the exception to this requirement is customized penetration flashings designed for multiple individual or clustered penetrations.
<li>When the separation between details does not comply with the spacing requirements in this Part, only the alternate application methods described in [[#12.3.2.1. General Requirements for Flashing Penetrations | Article 12.3.2.1.]] of the related waterproofing roof Standard will be permitted by the '''''Guarantor''''':
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#12.3.2.1._General_Requirements_for_Flashing_Penetrations Article 12.3.2.1.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#12.3.2.1._General_Requirements_for_Flashing_Penetrations Article 12.3.2.1.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
<li>Where alternate methods are not available in this Standard, or where the space between penetration flashings and any change in plane (e.g., ''curb'', sleeper, ''parapet'') is less 203.2 mm (8”), a Variance request shall be submitted to the '''''Guarantor''''' by the ''Design Authority'' following the Variance requirements in [[#1.1.3.6. Variances | Article 1.1.3.6.]]
</li></ol>
</li></ol>

====12.1.3.4. Curbs, Sleepers, and Equipment Pads====

<ol>
<li>The design and placement of ''curbs'' and sleepers shall be the responsibility of the ''Design Authority''.
<li>''Curbs'' must be designed so that they can be secured directly to the ''deck'' structure, or to intermediate blocking, and must not be situated on top of the ''waterproofing system''.
<li>All ''curbs'', sleepers, and deck-supported equipment pads must be designed to achieve a minimum height of 203.2 mm (8”), measured from the ''finished system surface'', to permit proper membrane flashing.
<li>Notwithstanding the minimum height requirement membrane flashing, ''curbs'' and sleepers that are completely sealed (enveloped) with membrane, and are free of penetrations through the top face (i.e., equipment isolators) may be less than 203.2 mm (8”) in height, measured from the ''finished system surface'', but shall be
<ol>
<li>no less than 101.6 mm (4") in height, or
<li>no less than 127 mm (5") in height when capped with a ''linear metal flashing''.
</li></ol>
<li>Equipment isolators are not considered part of the ''waterproofing system'' and therefore any leaks caused by or occurring at isolators shall be excluded from coverage under the '''''RoofStar Guarantee'''''.
<li>Equipment ("housekeeping") pads placed on top of the ''finished system surface'' and supporting combined loads
<ol>
<li>less than 90 kg (200 lbs) must be separated from the membrane with a bond-breaking layer (i.e., XPS insulation), and
<li>greater than 90 kg (200 lbs) must conform to the requirements for structural sleepers or equipment pads.
</ol></li>
<li>Reinforced liquid membrane flashing systems may be specified only where
<ol>
<li>sheet membrane applications are not practicable (i.e., complex geometry), or
<li>the top edge of membrane plies must be terminated on a vertical surface and other means of termination are not practicable or even possible.
</li></ol>
<li>''Curbs'' enclosed within or adjacent to landscaping shall be designed with base metal flashings to retain the root barrier and any other system components that must be turned up the vertical surface; base flashings shall be fabricated and installed in keeping with the requirements in [[#Part 13 - Linear Metal Flashing | Part 13]] (See [[#13.1.3.6. Cap Flashing, Counter-flashing, and Reglet Flashing | Articles 13.1.3.6.]], [[#13.2.2.1. Fabrication of Flashing | 13.2.2.1.]], and [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | 13.3.2.3.]]; also see Clause (1)(8) of Article 10.3.2.5., “Installation of Root Barrier”, in the [https://rpm.rcabc.org/index.php?title=VRA_Standard#10.3.2.5._Installation_of_Root_Barrier "RGC Standard for Vegetated Roofs"]).
</li></ol>

====12.1.3.5. Protection of Waterproofing Membranes====

<ol>
<li>The ''Design Authority'' must consider and specify mitigating strategies to preserve the waterproofing membrane from damage (i.e., specifying grease guards or a reinforced 2-part liquid membrane coating) when mechanical equipment extracts and discharges grease, chemicals, or other contaminants, onto the roof.
</li></ol>

====12.1.3.6. Railings, Ladders, and Other Attached Structures====

<ol>
<li>Railings, ladders, and other attached structures shall not be affixed at the field membrane level and must be designed for attachment to vertical surfaces only so that fasteners are elevated above the ''finished system surface'' at least 88.9 mm (3-1/2”).
<li>Ladders, railings, or other structures that may penetrate the ''waterproofing system'', should be designed to minimize thermal bridging (and consequential condensation) or reduced thermal performance; uninsulated direct, rigid connections to the structural ''deck'' or ''walls'' is strongly discouraged.
</li></ol>

==Section 12.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===12.2.1. Material Properties===
====12.2.1.1. Membranes Used for Flashing====

<ol>
<li>Sheet membranes used to flash (strip in) penetrations and ''curbs'' shall be
<ol>
<li>the same membrane used on the system field, or
<li>sheet or liquid membranes conforming to [[#10.2.1.1. Flashing Membranes | Article 10.2.1.1.]]
</li></ol>
</li></ol>

====12.2.1.2. General Requirements for Penetration Flashings====

<ol>
<li>All penetration flashings, except flashings that are proprietary to the ''manufacturer'' {{hilite | and flashings that are installed or supplied by others as part of a Code-compliant, certified chimney assembly (i.e., for solid fuel heating appliances) || 2023-October-28 }}, must be
<ol>
<li>sized to elevate the open end of the flashing or weather-head at least 203.2 mm (8”) above the ''finished system surface'',
<li>accepted by or acceptable to the '''''Guarantor''''',
<li>manufactured to conform to CSA-B272, "Prefabricated Self-Sealing Roof Vent Flashings" (a penetration flashing fabricated by the ''Contractor'' is exempt from this requirement),
<li>permanently marked with the standard number it conforms to, which shall be independently validated through published testing by a qualified third-party,
<li>manufactured from sheet metal conforming to the material requirements in [[#Section 13.2. Materials | Section 13.2.]], when the flashing is custom-made or fabricated by the ''Contractor'',
<li>compatible with the ''waterproofing system'',
<li>seamless or, in the alternative, fabricated with fully hot-welded joints, including a base flange at least 101.6 mm (4”) wide,
<li>capable of inhibiting the intrusion of vermin and insects into the ''roof assembly'' and building interior, and
<li>at least 203.2 mm (8”) tall when measured from the ''finished system surface'' to an opening, or to the top of the flashing.
</li></ol>
<li>Metal penetration flashings that are purpose-made for
<ol>
<li>electrical cables must be goose-necked and supplied with a downward-facing weather head that incorporates proprietary rubber-based friction seals, and
<li>plumbing vents shall be supplied with a matching settlement cap produced by the same manufacturer.
</li></ol>
<li>Galvanized penetration flashings, and galvanized vents, must
<ol>
<li>meet or exceed the CSA-A93 Standard,
<li>be made with material galvanized steel (26-gauge or heavier) conforming to the metal requirements found in [[#Part 13 - Linear Metal Flashing | Part 13, "Linear Metal Flashing"]], and
<li>be at least 203.2 mm (8”) tall when measured from the ''finished system surface'' to an opening.
</li></ol>
<li>In addition to the requirements in Sentence (1), stainless-steel penetration flashings specified for corrosive environments should be made of Grade 304 stainless steel conforming to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”, but when the penetration flashings may be subjected to regular or constant exposure to or immersion in water (especially in a coastal environment), or to corrosive environments, the stainless steel shall be Grade 316L (conforming to the same ASTM standard) (See [[Notes to GLW Standard#A-13.2.1.2.(3)(2)| Note A-13.2.1.2.(3)(2)]]).
<li>Storm collars
<ol>
<li>must be fashioned from galvanized or stainless steel,
<li>must slope downward from the penetration approximately 45°,
<li>shall be at least 50.8 mm (2”) wide,
<li>shall be self-locking or, in the alternative, manufactured to receive a mechanical band clamp, and
<li>should be fabricated with a channel at the top edge, for retaining sealant.
</li></ol>
<li>EPDM used to form a seal between a penetration and its flashing (Ref. [[#12.3.2.1. General Requirements for Flashing Penetrations | Article 12.3.2.1.(12)]]) shall be semi-cured and possess a nominal thickness of no less than 60 mils.
<li>Unshielded flexible mechanical couplings used to join a flashing and a pipe penetration shall be
<ol>
<li>certified to meet ASTM C564 or ASTM D5926,
<li>certified to meet ASTM C1173 and CSA-B602,
<li>supplied with top and bottom proprietary screw-type stainless steel mechanical clamps,
<li>leak-proof, resistant to chemicals, UV-stable, and
<li>suitable for the penetration and flashing they join together.
</li></ol>
</li></ol>

====12.2.1.3. Flashings for Heating and Plumbing System Penetrations====

<ol>
<li>All plumbing vent flashings shall be non-ferrous.
<li>Lead plumbing vent flashings are not permitted.
<li>In addition to the general requirements in [[#12.2.1.2. General Requirements for Penetration Flashings | Article 12.2.1.2.]], all metal penetration flashings (except natural airflow vents) used for heating and plumbing penetrations must be
<ol>
<li>properly sized for the penetration, both in diameter and height, and
<li>supplied with a properly sized galvanized storm collar or settlement cap.
</li></ol>
</li></ol>

====12.2.1.4. Liquid Membrane Flashing====

<ol>
<li>Polymethyl methacrylate (PMMA) and polyurethane methyl methacrylate (PUMA) liquid membrane flashing systems must be
<ol>
<li> catalyzed 2-component systems,
<li>fleece-reinforced with the manufacturer's proprietary polyester fleece, and
<li>accepted listed in [[Division C | Division C]] of this ''Manual''.
</li></ol>
<li>Single-component polyurethane and silicon-based liquid membrane flashing system must be listed in [[Division C | Division C]].
<li>Accessory PMMA detailing products
<ol>
<li>must be listed in [[Division C | Division C]], and
<li>must be reinforced with chopped or loose reinforcement fibres supplied by the ''manufacturer''.
</li></ol>
</li></ol>

==Section 12.3. Application==
===12.3.1. Guarantee Term Requirements===
====12.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====12.3.1.2. Reserved====

===12.3.2. All Systems===
====12.3.2.1. General Requirements for Flashing Penetrations====

<ol>
<li>All penetration flashing materials must be new.
<li>Anything that penetrates through the ''waterproofing assembly'', including openings in ''walls'' and for ventilation, must be
<ol>
<li>sealed to each ''control layer'' that it passes through or intersects, and
<li>flashed with
<ol>
<li>a flashing proprietary to and supplied by the membrane ''manufacturer'',
<li>a ''curb'',
<li>a purpose-made flashing, or
<li>a custom-fitted flashing{{strike| , all of which shall be sealed to the ''roof system'' so that the penetration or opening is protected from water ingress, to at least 203.2 mm (8") above the ''finished system surface''|| 2025-October-22 }}.
</li></ol>
</li></ol>
<li>Except for flashings that are proprietary to and supplied by the membrane ''manufacturer'', all flashings for penetrations in the system field shall be sealed to the ''waterproofing system'' so that the penetration or opening is protected from water ingress, to at least 203.2 mm (8") above the ''finished system surface''.
<li>Each penetration must have its own flashing (except where a purpose-made flashing is designed for multiple penetrations), and each flashing
<ol>
<li>must be suitable for the slope and penetration,
<li>shall be fitted with a cap, hood, weather-head, or closure fitting,
<li>shall not be left open to the weather, insects, or vermin, and
<li>must be properly sized and fitted around the penetration to permit a seal.
</li></ol>
<li>Except for storm collars, or where sealant pockets are permitted ([[#12.3.2.8. Sealant Pockets |Article 12.3.2.8.]]), the use of sealants to make a penetration watertight where it exits a flashing is not acceptable.
<li>Pipe penetrations in the roof field (e.g., plumbing vents)
<ol>
<li>must be at least 203.2 mm (8”) high, when measured from the ''finished system surface'',
<li>must be flashed with a spun flanged flashing at least 203.2 mm (8”) high, when measured from the ''finished system surface'',
<li>shall match the height of the flashing opening (pipes that are too short must be extended in a watertight manner), and
<li>shall be enclosed at the opening with a cap, supplied by the flashing manufacturer, that fits inside the pipe penetration and snugly fits around the outside of the flashing tube (caps should not be mechanically fastened to the flashing).
</li></ol>
<li>Hollow steel penetrations and structures with vent holes from the galvanizing process (e.g., ladders that are anchored to the ''project'' ''deck'' and penetrate the ''waterproofing system'') must be plugged with lead to prevent leaks.
<li>Non-ferrous penetration flashings and vents that conform to the material requirements in [[#Section 12.2. Materials | Section 12.2.]] may be located at the ''drainage plane'' in any assembly type.
<li>Lead penetration flashings are not permitted.
<li>All penetration flashings must be clean, dry, absolutely free of contaminants, have an exterior finish that is suitable to receive sheet or liquid membrane flashing, and must be prepared in keeping with any surface preparation requirements published by the membrane ''manufacturer''.
<li>Cable and horizontal pipe penetrations must be flashed with
<ol>
<li>a purpose-made flashing (i.e., a goose-neck flashing fitted with a weather head),
<li>a sheet membrane-flashed curb fitted with a customized sheet metal hood (shaped to function like a weather head), or
<li>a 2-component fleece-reinforced liquid membrane flashing as described in [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6.]] (when other methods are not possible or practicable).
</ol></li>
<li>Cables and piping (tubing) passing through a penetration flashing should be drooped (when possible), or fitted with a capillary-breaking collar and sealed at any openings, to prevent water from tracking along the cable or pipe, or to prevent wind-driven rain from entering the flashing, into the building; water that enters a building in this way bypasses the ''waterproofing system'' and does not constitute a leak and is therefore excluded from coverage under the '''''RoofStar Guarantee''''' (See '''Figure 12.3.2.1.A''' and '''12.3.2.1.-B''').
 
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 12.3.2.1.-A Flexible penetration showing drip loop and sealant''' Forming Part of Sentence 12.3.2.1.(13) (Click to expand illustration)
|-
| [[File:Part 12 - Illustration - Figure 12.3.2.1.-A.png|link=https://rpm.rcabc.org/images/6/6d/Part_12_-_Illustration_-_Figure_12.3.2.1.-A.png | 600 px]]
|}
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 12.3.2.1.-B Piping (tubing) penetrations through curb and metal hood flashing''' Forming Part of Sentence 12.3.2.1.(13) (Click to expand illustration)
|-
| [[File:Part 12 - Illustration - Figure 12.3.2.1.-B.png|link=https://rpm.rcabc.org/images/a/af/Part_12_-_Illustration_-_Figure_12.3.2.1.-B.png | 600 px]]
|}

<li>Penetration flashings must be sealed into the ''waterproofing system'' following the means and methods described and required in the applicable RGC Standard for roofs:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#12.3.2.1._General_Requirements_for_Flashing_Penetrations Article 12.3.2.1.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#12.3.2.1._General_Requirements_for_Flashing_Penetrations Article 12.3.2.1.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</ol></li>
</ol></li>

====12.3.2.2. Galvanized Penetration Flashings====

<ol>
<li>Galvanized, hot-welded flashings and vents may be installed on ''uninsulated systems'' or in a ''protected waterproofing system'', provided they are installed on ''curbs'' no less than 203.2 mm (8") in height above the ''finished system surface'' (Ref. [[#11.1.3.2. Roof Drain Function and Location | Article 12.1.3.2.]]) and are sealed to the ''curbs'' with sheet membrane.
</ol></li>

====12.3.2.3. Separation Between Penetration Flashings====

<ol>
<li>Penetrations on new construction ''projects'' must be separated from
<ol>
<li>other penetrations, ''curbs'', ''walls'', or changes in plane so that the space between flashings for these details is at least 304.8 mm (12") (this is measured between openings or the edge of a detail and excludes the flashing flange), and
<li>''roof drains'' at least 457.20 (18") (Also see [[#11.1.3.2. Roof Drain Function and Location | Article 11.1.3.2.]]).
</li></ol>
<li>When the separation between penetration flashings does not conform to the minimum spacing requirements, the application options described in [[#12.3.2.1. General Requirements for Flashing Penetrations | Article 12.3.2.1.]] of the applicable RGC Standard for roofs must be followed.
</li></ol>

====12.3.2.4. Curbs, Sleepers, and Equipment Pads====

<ol>
<li>Curbs shall be waterproofed following the means and methods described and required in the applicable RGC Standard for roofs:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#12.3.2.4._Curbs.2C_Sleepers.2C_and_Equipment_Pads Article 12.3.2.4.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#12.3.2.4._Curbs.2C_Sleepers.2C_and_Equipment_Pads Article 12.3.2.4.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</ol></li>
</ol></li>

====12.3.2.5. Alternative Approaches to Membrane Flashing====

<ol>
<li>The ''Contractor'' must assess the best approach to waterproofing any detail, when site conditions or construction sequencing require alternatives to heat-welding.
<li>When alternative methods are required,
<ol>
<li>curbs must be flashed by adapting the methods described in [[SBS_Roof_Systems_Standard#10.3.8.2. Pre-flashing | Article 10.3.8.2.]] of the "Standard for SBS-modified Bitumen Membrane Roof Systems", or by using other approaches that are equal or superior, and
<li>penetrations must be
<ol>
<li>incorporated into an adhered or self-adhered field membrane system, or
<li>flashed by using a pre-flashing method that is suitable for the penetration.
</li></ol>
</li></ol>
</li></ol>

====12.3.2.6. Liquid Membrane Flashing====
(See '''Figures 12.3.2.6.-A''' and '''12.3.2.6.-B''')

<ol>
<li>Any liquid flashing system shall
<ol>
<li>conform to the material requirements in [[#12.2.1.4. Liquid Membrane Flashing | Article 12.2.1.4.]],
<li>be compatible with the substrate to which it is applied,
<li>be applied to a properly prepared substrate, which must be clean, dry, free of contaminants, and primed, as required by the manufacturer in their published instructions,
<li>be applied within masked boundaries to produce clean, straight, plumb edges (accessory products may be exempt from this requirement only when masking is impracticable),
<li>be used only when permitted by the ''manufacturer'', and
<li>be applied in keeping with the requirements and limitations of this Article.
</ol></li>
<li>Liquid membrane flashing systems may not be used on plastic substrates.
<li>When liquid membrane flashing systems are required or specified, only two--component fleece-reinforced catalyzed polymethyl methacrylate (PMMA) and polyurethane methyl methacrylate (PUMA) liquid membrane flashing systems may be used
<ol>
<li>on the ''drainage plane'',
<li>where sheet membrane flashing may not be practical or even possible,
<li>to terminate the top edge of sheet membrane flashing,
<li>where resistance to contamination of sheet membrane is necessary,
<li>where abrasion resistance is required, or
<li>for sheet membrane reinforcement (i.e., at corners).
</ol></li>
<li>Two-component fleece-reinforced catalyzed polymethyl methacrylate (PMMA) and polyurethane methyl methacrylate (PUMA) liquid membrane flashing systems
<ol>
<li>may be used
<ol>
<li>where abrasion resistance is desirable, or
<li>where the ''Design Authority'' specifies its application.
</ol></li>
<li>shall be applied to ensure that
<ol>
<li>the rate of application conforms to the ''manufacturer's'' published instructions, unless superseded by this Standard,
<li>the base coating of catalyzed liquid membrane resin evenly and fully covers the masked area,
<li>the manufacturer’s reinforcement fleece is cut to cover the masked area, to within 4.76 mm (1/8”) of all edges,
<li>the fleece is fully embedded in, and saturated with, the based coating of resin, and
<li>the fleece is evenly and thoroughly coated with a second application of catalyzed liquid membrane resin, covering the masked area.
</ol></li>
</ol></li>
<li>Where a fleece-reinforced 2-component catalyzed polymethyl methacrylate (PMMA) liquid membrane flashing system is used to terminate sheet membrane on the vertical plane, the liquid membrane flashing system must overlap the sheet membrane, and it must extend onto the vertical substrate above the sheet membrane, by no less than 50.8 mm (2") ('''Figure 12.3.2.-B''').
<li>Fleece-reinforced 2-component catalyzed polymethyl methacrylate (PMMA) liquid membrane flashing system that is used as a substitute for sheet membrane flashing must be carried up a vertical plane above the ''finished system surface'' at least 203.2 mm (8”), and no less than 203.2 mm (8") onto the horizontal field plane (See '''Figure 12.3.2.6.-A'''| and '''Figure 12.3.2.6.-B''').
<li>Single-component polyurethane and silicon-based liquid membrane flashing ''system''
<ol>
<li>may be used
<ol>
<li>to coat galvanized flashings used in the water plane, provided the application follows the requirements in [[#12.3.2.2. Galvanized Penetration Flashings | Article 12.3.2.2., "Galvanized Penetration Flashings"]],
<li>to flash details more than 101.6 mm (4”) above the water plane, that cannot be sealed with sheet-type membranes, or
<li>to seal pre-curb dowels (see [[#14.3.2.7. Structures and Equipment | Article 14.3.2.7.]]).
</ol></li>
<li> must not be used in the ''drainage plane'', or to reinforce membranes against abrasion,
<li>must be applied in two cured coats, unless otherwise permitted in this Standard, and
<li>must be fleece-reinforced between coats where
<ol>
<li>the application is considered permanent,
<li>a change in plane (angle) occurs, or
<li>there is a joint between two supports and the liquid membrane must serve as a bridge.
</ol></li>
</ol></li>
<li>Accessory PMMA detailing products
<ol>
<li>shall not be used as a substitute for fleece-reinforced 2-component PMMA systems, where these are required or exclusively permitted,
<li>must be used at locations 101.6 mm (4”) or more above the ''finished system surface'', except where complex details, such as bolt heads, cannot be properly sealed with a fleece-reinforced 2-component PMMA system, and
<li> must not be used where movement is expected.
</ol></li>
</ol></li>
 
::{|
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 12.3.2.6.-A Application Requirements for PMMA on Roof Penetration''' Forming Part of Sentence 12.3.2.6.(4) (Click to expand illustration)
|-
| [[File:Figure 12.3.-B (Generic).jpg |link=https://rpm.rcabc.org/images/7/75/Figure_12.3.-B_%28Generic%29.jpg | 500 px]]
|}
 
::{|
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 12.3.2.6.-B Illustration of Various Liquid Membrane Flashing Applications''' {{hilite | Forming Part of Article 12.3.2.6. (Click to expand illustration)
|-
| [[File:Part 12 - Figure 12.3.2.6.-B.png|link=https://rpm.rcabc.org/images/9/92/Part_12_-_Figure_12.3.2.6.-B.png | 800 px]]
|}

====12.3.2.7. Railings, Ladders, and Other Attached Structures====
(See also Construction Detail [[SBS Railing | "Railing"]])

<ol>
<li>Fasteners installed to secure railings, ladders, and other structures to the vertical face of ''walls'' must be located at least 88.9 mm (3-1/2") above the ''finished system surface''.
<li>Railings, ladders, and other structures mounted on a waterproofed horizontal substrate that is part of the ''waterproofing assembly'' (i.e., on top of a ''parapet'') shall be fully flashed around each base with a fleece-reinforced liquid membrane flashing material, unless directed otherwise by a written Variance issued by the '''''Guarantor''''', using a product that is
<ol>
<li>suitable for use in the ''drainage plane'',
<li>applied in keeping with the requirements in [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6.]], and
<li>compatible with roofing membranes installed on the substrate.
</li></ol>
<li>Railings, ladders, and other structures shall not direct water into the building by means of weep holes or the method of fastening.
</li></ol>

<hr>
<div id=PART_13></div>

=Part 13 - Linear Metal Flashing=
==Section 13.1. Design==
===13.1.1. General===
====13.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====13.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Cleat'', also referred to as a "wind clip", is a long piece of sheet metal that is fastened to a solid substrate (usually structural) behind a ''linear metal flashing'', to hold it in place.
<li>''Drip edge'' means the bent (kicked-out) hemmed edge of a linear metal flashing, measuring at least 19.05 mm (3/4") and angled no more than 30° from vertical ("Architectural Sheet Metal Manual" published by the Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA), Sixth Ed.: p. 2.3); it is used to direct dripping water away from the face of the metal flashing or the materials it is protecting, such as a wall. A drip edge may be fabricated on any linear metal flashing but is commonly used on coping (parapet cap) and counterflashing (also see the Glossary for a colloquial use of the term).
<li>''Hemmed edge'' means an edge of a ''linear metal flashing'' that is folded onto itself (bent 180°), to render a smooth (not raw or sharp) finish (this is sometimes referred to as a "safety edge").
<li>''Linear metal flashing'' means flashings cut and shaped from flat metal stock, to redirect water at ''waterproofing system'' perimeters and edges, or to control the flow of water in valleys and drainage spillways. ''Linear metal flashings'' also protect waterproofing membranes from weathering and damage and provide an aesthetic finish to the ''waterproofing system''.
</li></ol>
</li></ol>

===13.1.2. Guarantee Term Requirements===
====13.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====13.1.2.2. Reserved====

===13.1.3. All Systems===
====13.1.3.1. Scope and Function====
(See also the "Architectural Sheet Metal Manual" published by the Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA))

<ol>
<li>''Linear metal flashings'' described in this Part and referenced elsewhere in this Standard
<ol>
<li>are considered necessary and integral to the scope of a ''project'' designed and constructed to qualify for a '''''RoofStar Guarantee''''',
<li>do not perform a waterproofing function and therefore must be specified for use over membrane flashing, or designed to shed water onto a waterproofing or water-shedding primary material,
<li>shall be new (reuse of any existing ''linear metal flashings'' is prohibited and may void the '''''Guarantee''''' (See [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2., "Limitations and Exclusions of Guarantee"]]), and
<li>shall be ''Contractor''-fabricated to suit the ''project'' requirements or shall be listed in [[Division_C | Division C]] as materials pre-engineered and manufactured by a metal supplier.
</li></ol>
<li>The requirements in this Part apply almost entirely to ''Contractor''-fabricated linear metal flashings; consequently, RoofStar-accepted pre-engineered products accepted as systems are exempt from the requirements in this Part for metal gauge, profile, and securement, unless expressly stated otherwise.
<li>''Linear metal flashings''
<ol>
<li>must be specified when UV-sensitive membranes require protection, or when membrane edges will otherwise be exposed to the sun, to water, or to physical damage, and
<li>may be specified to cover ''parapet'' caps, sleepers, or curbs
<ol>
<li>for aesthetic reasons, or
<li>to protect the membrane from damage resulting from maintenance (i.e., pressure washing of decks or pavers), or from foot traffic.
</li></ol>
</li></ol>
</li></ol>

====13.1.3.2. Information Required in Specifications====

<ol>
<li>{{hilite | Subject to the requirements in this Standard,|| 2021-February-7 }} the ''Design Authority'' must specify
<ol>
<li>metal type, finish, and gauge,
<li>seam types,
<li>length of flashings (if different from the requirements in this Part), and
<li>method of attachment (concealed or exposed fasteners).
</li></ol>
<li>Design drawings must detail metal flashing profiles desired for the ''project''.
</li></ol>

====13.1.3.3. Securement====

<ol>
<li>Securement of all ''linear metal flashings'' shall be specified in keeping with the application requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]
</li></ol>

====13.1.3.4. Gauge, Dimension Limitations, and Seams====

<ol>
<li>Gauge, dimensions, slope, and length of ''linear metal flashings'' must be specified to conform to the requirements in '''Table 13.1.3.4.-A''' and [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]], but shall not be less than 26-Gauge.
<li>Specified seam types shall conform to the requirements in '''Table 13.1.3.4.-B''' and [[#13.3.2.2. Seams | Article 13.3.2.2.]]
</li></ol>
 
::::::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Table 13.1.3.4.-A. Pre-finished Galvanized Steel Cap (Coping) Flashing (Gauge and Length Requirements)''' Forming Part of Sentence 13.1.3.4.(1).
|-
|}
:{| class="wikitable" style="text-align: left; margin-left: 20pt; margin-right: auto; border: none;"
|-
! Horizontal Span !! Minimum Slope !! Gauge !! Maximum Flashing Segment Length !! Seam Options
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | Up to 304.8 mm (12") || rowspan="2" style="vertical-align:centre;text-align:center;" | 2% || 26, 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | ≤ 3048 mm (120")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 304.8 - 914.4 mm (12" to 36") || rowspan="2" style="vertical-align:centre;text-align:center;" | 4% || 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | ≤ 3048 mm (120")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 914.4 mm (36") or greater || rowspan="2" style="vertical-align:centre;text-align:center;" | 6% || 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | ≤ 1219.2 mm (48")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | Up to 304.8 mm (12") || rowspan="2" style="vertical-align:centre;text-align:center;" | 2% || 24 || rowspan="6" style="vertical-align:centre;text-align:center;" |3048 mm (12"), as specified by a ''registered professional'' || S-lock or Standing Seam†
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 304.8 - 914.4 mm (12" to 36") || rowspan="2" style="vertical-align:centre;text-align:center;" | 4% || 24 || S-lock or Standing Seam†
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 914.4 mm (36") or greater || rowspan="2" style="vertical-align:centre;text-align:center;" | 6% || 24 || S-lock or Standing Seam†
|-
| 22+ || Butt Seams*
|}
::''*'' Ref. [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]
::† Seam type shall be determined by the ''registered professional'' but when the flashing exceeds 3048 mm (120”) in length and linear expansion or contraction will be greater than 6.35 mm (¼”), only S-locks or Butt Seams shall be used.

::::::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Table 13.1.3.4.-B. Pre-finished Galvanized Steel Vertical Flashing (Gauge and Length Requirements)''' Forming Part of Sentence 13.1.3.4.(2).
|-
|}

:::::{| class="wikitable" style="margin-left: 0pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:center;"
|-
! Vertical Face !! Gauge!! Maximum Flashing Segment Length !! Vertical Seam Options
|-
| Up to 152.4 mm (6") || 26 || ≤ 3048 mm (120") || S-lock
|-
| Up to 203.2 mm (8") || 24 || ≤ 3048 mm (120") || S-lock
|-
| Up to 304.8 mm (12") || 22+ || ≤ 3048 mm (120") || Butt Seams*
|-
| Up to 152.4 mm (6") || 24 || rowspan="3" style="vertical-align:centre;text-align:center;" | >3048 mm (120”), as specified by a ''registered professional'' || S-lock*†
|-
| Up to 203.2 mm (8") || 24 || S-lock*†
|-
| Up to 304.8 mm (12") || 22+ || S-lock or Butt Seams*†
|-
|}
::''*'' Ref. [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]
::† Seam type shall be determined by the ''registered professional'', but when the flashing exceeds 3048 mm (120”) in length and linear expansion or contraction will be greater than 6.35 mm (¼”), only S-locks or Butt Seams shall be used.

====13.1.3.5. Fit and Finish====

<ol>
<li>Fit and finish of all ''linear metal flashings'' shall conform to the requirements in [[#13.2.2. Fabrication and Finish | Subsection 13.2.2.]]
<li>''Drip edges'' are not required but are strongly recommended for ''linear metal flashings'' installed around the outside perimeter of a building, to protect ''wall'' finishes (Ref. [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1.]] for fabrication requirements).
<li>Stainless steel flashings and fasteners are recommended for use in environments where significant corrosion may occur (e.g., near salt-water coastlines) (See [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]] for stainless steel material requirements).
</li></ol>

====13.1.3.6. Cap Flashing, Counterflashing, and Reglet Flashing====

<ol>
<li>Cap (coping) flashings
<ol>
<li>are required for all ''parapets'' (including ''parapets'' on ''waterproofing assemblies'' that are adjacent to each other),
<li>are optional for ''control joints'' (area dividers) that are fully enveloped with waterproofing membrane (Ref. [[#10.3.6.2. Control Joints (Roof Dividers) | Article 10.3.6.2.]]), and
<li>are recommended on ''control joints'' (area dividers) where the membrane may be susceptible to abrasion or mechanical damage.
</li></ol>
<li>All linear metal cap (coping) flashing specified for ''parapets'' shall indicate securement to a solid substrate
<ol>
<li>at every seam, using S-locks or standing seam clips (Ref. [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]),
<li>beneath the outside vertical face of the flashing, using hidden clips (Ref. [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3.]]), and
<li>on the waterproofing side (inside) face of the flashing.
</li></ol>
<li>The use of exposed fasteners on the exterior face of cap (coping) flashing specified for ''parapets'' is not permissible.
<li>When the top surface of a ''wall'' exceeds 101.6 mm (4") in width, linear metal coping (cap) flashing must be specified with a minimum slope of 2% toward the waterproofing side of the ''parapet'', to promote drainage (drainage toward the exterior of a building is not recommended).
<li>All metal cap (coping) flashing must be designed with full, solid support.
<li>When the specified cap flashing material is thicker or heavier than 18-gauge steel or aluminum, or it exceeds the permissible weight or gauge ranges for copper or zinc flashings, the seam and securement design must be submitted to the '''''Guarantor''''' for review prior to tender (See [[#13.3.2.2. Seams | Article 13.3.2.2.]] concerning flat butt seams).
<li>Base metal flashings used to conceal wall materials or to restrain filtration materials and drainage boards must be fashioned to conform to [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1.]] and [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3.]]
</li></ol>

====13.1.3.7. Intersections with Other Assemblies====

<ol>
<li>Where a ''parapet'' intersects with a ''wall'', the union must be designed to direct water to the ''waterproofing system'', away from the outer surface of the ''wall'', using a metal saddle assembly in combination with the membrane requirements in [[#10.3.4.1. Parapets | Article 10.3.4.1.]] (Ref. [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3.]]).
</ol></li>

==Section 13.2. Materials==
(Ref. [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]] concerning limitations and exclusions for metal flashing.)

===13.2.1. Material Properties===
====13.2.1.1. Manufacturing and Supply====

<ol>
<li>''Linear metal flashings'' must be new, manufactured and supplied by the ''Contractor'' or by an Associate Member of the RCABC, and must conform to the requirements published in this Part.
</ol></li>

====13.2.1.2. Sheet Metal Grade and Gauge====

<ol>
<li>A mill certificate must be provided by the ''Contractor'' when requested by the ''Design Authority''.
<li>When stainless-steel metal flashings are specified, grade 304 stainless steel conforming to the requirements in Clause (3)(2) may be used in most applications but when flashings will be subject to regular or constant immersion in water (especially in a coastal environment), or to corrosive environments, the flashings should be manufactured from Grade 316L stainless steel conforming to the requirements below.
<li>The following minimum gauges and/or weights of sheet steel materials apply to all ''linear metal flashings'' (the reference standard for gauges is USS REV (metric in mm)):
<ol>
<li>'''Galvanized steel''': minimum 0.50 mm (0.0196", 26-gauge) galvanized steel sheet, conforming to ASTM A653 / A653M-06 CS Type B, Z275 (G90) coating. Thickness tolerance as per ASTM A924/A924M-06 ±0.08 mm (0.003") for sheet widths not exceeding 1524 mm (60").
<li>'''Stainless Steel Grade 304''': minimum 0.38 mm (0.014", 28-gauge) stainless steel, Grade 304, conforming to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”. Maximum thickness tolerance variation ± 0.04 mm (0.0015") based on 1219.2 mm (48") wide sheet (See [[Notes to GLW Standard#A-13.2.1.2.(3)(2) | Note A-13.2.1.2.(3)(2)]]).
<li>'''Stainless Steel Grade 316L''': minimum 0.38 mm (0.014", 28-gauge) stainless steel, conforming to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”.
<li>'''Aluminum-Zinc alloy-coated steel''': minimum 0.50 mm (0.0196", 26-gauge) aluminum-zinc alloy coated steel sheet, conforming to ASTM A792/A792M-06 CS Type B, AZM150 (AZ50) coating. Thickness tolerance as per ASTM A924/A924M-06 ±0.08 mm (0.003") for sheet widths not exceeding 1524 mm (60").
</li></ol>
<li>The following minimum gauges and/or weights of non-ferrous materials apply to all ''linear metal flashings'':
<ol>
<li>'''Aluminum''': minimum 0.80 mm (0.032", 20-gauge) aluminum sheet, utility quality to CSA HA Series - 1975, plain or embossed finish. Maximum thickness tolerance variation ± 0.06 mm (0.0025") based on 1219.2 mm (48") wide sheet.
<li>'''Copper''': minimum 0.56 mm (24-gauge; 0.0216", 16 oz.) copper sheet, cold rolled roofing copper to ASTM B370-81. Maximum thickness tolerance variation ± 0.09 mm (0.0035") based on 1219.2 mm (48") wide sheet.
<li>'''Zinc''': minimum 0.80 mm (0.031") zinc Sheet conforming to European standard EN 988-1996. Maximum thickness tolerance variation ± 0.03 mm (0.0012").
</li></ol>
<li>Where a ''waterproofing system'' adjoins and "Architectural Sheet Metal System", ''linear metal flashings'' must be fabricated from 24-gauge steel stock.
</li></ol>

====13.2.1.3. Fasteners====

<ol>
<li>Fasteners must be
<ol>
<li>threaded screws, friction-type pins (i.e., for masonry or concrete), plug (inserts), or rivets (where permitted),
<li>compatible with materials they contact,
<li>corrosion-resistant,
<li>specified by the ''Design Authority'', and
<li>appropriately sized, in both length and thread type, for the material to which they will be secured.
</li></ol>
<li>Nails are not acceptable as fasteners.
<li>Notwithstanding the requirements in Sentence (1), threaded fasteners used to secure linear metal flashings
<ol>
<li>in concealed locations must be at least No. 8, corrosion-resistant screw or expansion fastener with a low-profile head and must be compatible with both the metal flashing material and the substrate.
<li>in exposed locations must be at least No. 10., shall be gasketed (cladding screws), and must match the colour of the materials they fasten.
</li></ol>
<li>When pre-engineered ''linear metal flashing systems'' are specified, fasteners provided by the manufacturer must be used.
<li>Rivets shall be closed-end, dome-head type, and shall be used only for fastening together linear metal flashings.
</li></ol>

====13.2.1.4. Sealants====

<ol>
<li>Sealants shall be
<ol>
<li>non-hardening high-quality butyl or polyurethane,
<li>available in either gun grade or sealant tape form,
<li>suitable for exterior use and able to resist the effects of weathering, and
<li>compatible with, and able to adhere to, the materials to which they are applied.
</ol></li>
<li>Sealants shall conform to
<ol>
<li>CGSB 19-GP-5M, “Sealing Compound, One Component, Acrylic Base, Solvent Curing”,
<li>CAN / CGSB-19.13, “Sealing Compound, One Component, Elastomeric, Chemical Curing”,
<li>CGSB 19-GP-14M, “Sealing Compound, One Component, Butyl-Polyisobutylene Polymer Base, Solvent Curing”, or
<li>CAN / CGSB-19.24, “Multi-Component, Chemical Curing Sealing Compound”.
</ol></li>
</ol></li>

===13.2.2. Fabrication and Finish===
====13.2.2.1. Fabrication of Flashing====

<ol>
<li>Linear metal flashings must be new, must conform to the requirements published in this Part, and shall be manufactured and supplied
<ol>
<li>by the ''Contractor'',
<li>for the ''Contractor'' by another ''Contractor'' (RCABC Member), or
<li>by an ''Associate Member'' of the RCABC.
</ol></li>
<li>Unless expressly accepted by the '''''Guarantor''''', all linear metal flashing fabricated by the ''Contractor'' shall conform to the requirements in this Part.
{{strike| Specified drip edges must be broken (bent) outward from the face of the flashing by at least 30° and shall measure at least 19.05 mm (3/4”), extending from the break. || 2025-October-22 }}
<li>All ''linear metal flashing'', except those that are pre-engineered and expressly accepted by the RGC,
<ol>
<li>must be hemmed, and
<li>shall conform to the minimum requirements in '''Table 13.1.3.4.-A''' and '''13.1.3.4.-B.'''
</ol></li>
<li>Slotted holes, to allow for the coefficient of expansion, are recommended for any length of linear metal flashing, where gasketed screws are used to secure it (See '''Figure 13.2.2.1.-A'''. Also see [[Notes to GLW Standard#A-13.2.2.1.(4)|Note A-13.2.2.1.(4)]]).
<li>The vertical leg of any ''linear metal flashing'' that overlaps roofing material
<ol>
<li>must be at least 76.2 mm (3") in height, exclusive of the drip or hemmed edge, when measured between each break,
<li>and shall overlap the edge of a membrane (i.e., membrane flashing on a wall) by at least 25.4 mm (1”).
</ol></li>
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.2.2.1.-A Roof-side face of cap flashing showing slotted hole for gasketed fastener''' Forming Part of Article 13.2.2.1. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.2.2.1.-A.png |link=https://rpm.rcabc.org/images/b/bb/Part_13_-_Illustration_-_Figure_13.2.2.1.-A.png | 600 px]]
|}

<li>All hemmed ''drip edges'' shall be broken (bent) outward from the face of the flashing by at least 30° (See '''Figure 13.2.2.1.-B''').
<li>The fabrication of linear metal flashings longer than 3048 mm (120”) is permissible, provided
<ol>
<li>galvanized steel flashings are manufactured from metal stock 24-gauge or heavier, and
<li>the method of securement, regardless of the material, allows for the coefficient of expansion (See [[Notes to GLW Standard#A-13.2.2.1.(4)| Note A-13.2.2.1.(4)]].
</ol></li>
<li>All Cap (coping) flashing shall be fabricated with a hemmed drip edge at the bottom of the outside vertical face, to receive the cleat (wind clip) (See '''Figure 13.2.2.1.-B''').
<li>Cleats (wind clips) must be fabricated with a hooked edge that both matches the angle of the cap flashing drip edge and will fit inside (be enclosed by) it (See '''Figure 13.2.2.1.-B''').
<li>When the length of cap flashing is equal to or less than 3048 mm (120”), the length of the hemmed drip edge shall be enough to enclose at least 12.7 mm (1/2”) of the cleat (wind clip) (See '''Figure 13.2.2.1.-A'''; also see[[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Clause 13.3.2.3.(2)(1)]]).
<li>When cap flashing is longer than 3048 mm (120”),
<ol>
<li>the cleat (wind clip) for the outside face of a parapet must be
<ol>
<li>continuous (discontinuous cleats (wind clips) are not permitted), and
<li>fabricated from compatible flat metal stock, two gauges heavier than the cap flashing,
</ol></li>
<li>the length of the hemmed drip edge shall be enough to enclose at least 15.88 mm (5/8”) of the hidden clip hook,
<li>the waterproofing-side face of cap flashing must be fabricated to allow for the coefficient of expansion (See [[Notes to GLW Standard#A-13.2.2.1.(4)| Note A-13.2.2.1.(4)]]:
<ol>
<li>If gasketed screws are specified, the flashing must be slotted, based on the engineered securement requirements (See [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3.]]).
<li>If a cleat (wind clip) is specified, the cleat (wind clip) and the drip edge of the flashing shall conform to the requirements for cleat (wind clip) securement on the outside face of the parapet (using hidden clips, which can allow for unfettered expansion and contraction, is considered a best practice);
</ol></li>
and
<li>seams joining lengths of cap flashing together shall conform to the engineered requirements for the flashing system (See '''Table 13.1.3.4.-A''' and '''Table 13.1.3.4.-B''').
</ol></li>
<li>With the exception of ''drip edges'', any break in the vertical face of a linear metal flashing to direct water away from the building shall be at least 30° downward (See '''Figure 13.2.2.1.-B''').
 
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.2.2.1.-B Counter-flashing and cap flashing fabrication requirements''' Forming Part of Article 13.2.2.1. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.2.2.1.-B.png|link=https://rpm.rcabc.org/images/f/fd/Part_13_-_Illustration_-_Figure_13.2.2.1.-B.png | 700 px]]
|}

<li>Base flashing must be fabricated with a drip edge or a flat hemmed edge that, when installed, shall be at least 25.4 mm (1”) above the filtration and drainage course of an insulated ''waterproofing assembly'' or ''overburden'' (See '''Figure 13.3.2.3.-E''').
<li>Metal edge flashing must be fabricated with
<ol>
<li>a flange measuring no less than 101.6 mm (4") in width,
<li>a vertical drop and hemmed drip edge at least 50.8 mm (2"), and (when transitioning to a lower ''water-shedding systems'')
<li>a sloped drop of no less than 101.6 mm (4").
</ol></li>
<li>Metal edge flashing may be constructed with or without an upstand at the outside edge (Edge flashing intended as a drainage edge may perform best without an upstand).
</ol></li>

====13.2.2.2. Pre-painted Finishes====

<ol>
<li>When a painted finish on ''linear metal flashing'' is specified, only SMP and PVDF pre-painted finishes are acceptable.
<li>Where ''Architectural Metal Roofing'' is installed, adjoining ''linear metal flashing'' must have the same finish as the metal panels.
</ol></li>

==Section 13.3. Application==
===13.3.1. Guarantee Term Requirements===
====13.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====13.3.1.2. Reserved====

===13.3.2. All Systems===
====13.3.2.1. General Requirements for Linear Metal Flashing====

<ol>
<li>RoofStar-accepted pre-engineered securement ''systems'' must be secured according to the ''manufacturer’s'' specifications.
<li>All cap (coping) flashings and other ''linear metal flashings'' subjected to wind loads on ''parapets'', roof dividers, firewalls, or any other vertical structure, must be secured to resist displacement by wind load.
<li>All ''linear metal flashing'' installed over an organic substrate (i.e., wood) shall be separated from the substrate with a suitable separation material (i.e., self-adhered bituminous membrane used as eave protection in a ''water-shedding system'').
<li>Unless otherwise provided for in this Part, mechanical fasteners used to secure ''linear metal flashing'' or their clips
<ol>
<li>shall conform to the fasteners requirements in [[#13.2.1.3. Fasteners | Article 13.2.1.3.]],
<li>shall be spaced no more than 304.8 mm (12”) O.C.,
<li>shall be firmly fastened, without distorting secured materials,
<li>must penetrate the substrate as specified in the screw manufacturer’s published minimum values, but shall nevertheless penetrate
<ol>
<li>through the back surface of steel framing at least 19.05 mm (3/4"),
<li>into or through plywood so that screw threads engage its full thickness, excluding the unthreaded tip, and
<li>into solid substrate (i.e., dimensional lumber or concrete) at least 25.4 mm (1"), and
<li>must be installed at least 88.9 mm (3-1/2") above the ''finished system surface''.
</li></ol>
</li></ol>
<li>Canted edge metal flashing may be mechanically fastened from the outside face but shall not be face-fastened on the waterproofing side of the flashing.
<li>Sealants must be tooled to positively shed water.
</li></ol>

====13.3.2.2. Seams====
(The requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1., "General Requirements for Linear Metal Flashing"]], shall be read together with the following requirements. See also [[#13.1.3.4. Gauge, Dimension Limitations, and Seams | Article 13.1.3.4.]])

<ol>
<li>RoofStar-accepted pre-engineered ''linear metal flashing'' may be joined together using seams specified for the accepted flashing.
<li>All ''linear metal flashing'' that is not pre-engineered must be seamed together following the requirements set out in this Article.
<li>All seams must allow for metal expansion and contraction.
<li>The seam and securement design must be approved by the '''''Guarantor''''' when the specified cap flashing material
<ol>
<li>is steel or aluminum, and the material is thicker or heavier than 18-gauge, or
<li>is copper and zinc, and the material thickness or weight exceeds the weight or gauge requirements in [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]]
</li></ol>
<li>'''Straight (linear) joints''' between lengths of ''linear metal flashing'' must be fully seamed using only an Standing Seam ('''Figure 13.3.2.2.-A''') or S-Lock ('''Figure 13.3.2.2.-B'''), but this requirement does not apply to
<ol>
<li>flashing fashioned from 22-gauge metal (or heavier), or
<li>the vertical face of any flashing that is concealed by a ''wall assembly'', counterflashing, or equipment flange, in which case the vertical joint may be lap-seamed, provided the overlap
<ol>
<li>is no less than 101.6 mm (4”) when fully caulked in the lap, or
<li>is no less than 152.4 mm (6”) when installed without caulking in the lap.
</li></ol>
</li></ol>
<li>The top face (horizontal plane) of flashings that intersect at a corner (i.e., coping flashing) must be joined with a standing seam.
<li>Where drip edges meet at an outside corner, the cut edges of the mitred joint must be mechanically connected (Closed with a "rat tail").
<li>When the face of vertically oriented flashing forms an '''outside corner''', and the height of the flashing
<ol>
<li>is greater than 101.6 mm (4”), the two flashings must be joined using only a standing seam.
<li>is 101.6 mm (4”) or less, the two flashings must be joined using
<ol>
<li>a standing seam,
<li>an S-lock, or
<li>a lap joint, but the drip edges must be mechanically connected (Closed with a "rat tail").
</li></ol>
</li></ol>
<li>When the face of vertically oriented flashing forms an '''inside corner''', and the height of the flashing
<ol>
<li>is greater than 101.6 mm (4”), the two flashings must be joined using only a standing seam.
<li>is 101.6 mm (4”) or less, the two flashings must be joined using
<ol>
<li>a standing seam, or
<li>a flat overlapped seam.
</li></ol>
</li></ol>
<li>Sealant applied to S-lock or standing seams is not a requirement in this Standard, but when it is specified
<ol>
<li>the sealant must be applied along the full length of the seam, and
<li>any sealant that extrudes from the seam during the seaming process must be removed and discarded (See [[#1.3.2.2. Workmanship | Article 1.3.2.2., "Workmanship"]]).
</li></ol>
<li>'''Standing seams''' (See '''Figure 13.3.2.2.-A''') must incorporate clips when the seam is longer than 101.6 mm (4”), and the clips must be
<ol>
<li>fabricated from flat metal stock 24-gauge or heavier,
<li>at least 38.1 mm (1-1/2”) wide,
<li>spaced apart from each other no more than 203.2 mm (8”) O.C.,
<li>embedded in an acceptable sealant, and
<li>secured with at least 2 acceptable low-profile flat head screws.
</li></ol>

 
::{|
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.2.-A Standing Seam''' Forming Part of Sentence 13.3.2.2.(5) (Click to expand illustration)
|-
| [[File:MF - Standing Seam.png | link=https://rpm.rcabc.org/images/a/a3/MF_-_Standing_Seam.png | 500 px]]
|}

<li>'''S-locked seams''' (See '''Figure 13.3.2.2.-B''') must be secured through flashing tab (leaf) with at least one (1) acceptable low-profile flat head screw when the seam is longer than 101.6 mm (4”), but fasteners must not be spaced more than 203.2 mm (8”) O.C.
 
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.2.-B S-Lock, Double''' Forming Part of Sentence 13.3.2.2.(11) (Click to expand illustration)
|-
| [[File:MF - S-Lock, Double.png | link=https://rpm.rcabc.org/images/b/b6/MF_-_S-Lock%2C_Double.png | 500 px]]
|}

<li>'''Flat butt seams''' (See '''Figures 13.3.2.2.-C''' and '''13.3.2.2.-D''')
<ol>
<li>are permissible only for cap (coping) flashings, and only when the flashing is fabricated from steel or aluminum ranging in thickness from 22-Gauge to 18-Gauge (the same applies to the equivalents for copper and zinc sheet material, by gauge or weight), and
<li>must have a hemmed front edge fabricated to hook onto a supporting saddle.
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.2.-C Flat butt seams''' {{hilite | Forming Part of Article 13.3.2.2. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.2.-C.png|link=https://rpm.rcabc.org/images/f/f0/Part_13_-_Illustration_-_Figure_13.3.2.2.-C.png | 600 px]]
|}

::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.2.-D Flat butt seams''' {{hilite | Forming Part of Article 13.3.2.2. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.2.-D.png|link=https://rpm.rcabc.org/images/9/92/Part_13_-_Illustration_-_Figure_13.3.2.2.-D.png | 600 px]]
|}

<li>The saddle for flat butt seams (See '''Figures 13.3.2.2.-C''' and '''13.3.2.2.-D''') must be
<ol>
<li>manufactured from the same material as the flashing,
<li>formed to match the profile of the cap flashing,
<li>fabricated with a hook along the front face,
<li>secured to the parapet with screws,
<li>installed to underlap the butt joint by at least 101.6 mm (4”) on either side,
<li>seated in two parallel beads of un-tooled sealant or butyl tape, which must be applied between the saddle and flashing, on either side of the butt joint, to all three adjoining faces, and
<li>secured to the cap flashing along both faces of the parapet (See [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]).
</li></ol>
</li></ol>

====13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing====
(The requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1., "General Requirements for Linear Metal Flashing"]], shall be read together with the following requirements)

<ol>
<li>Cap (coping) flashings must be
<ol>
<li>solidly and fully supported,
<li>separated from organic materials (i.e., wood) with roofing membrane, and
<li>joined using standing seams or S-locks (Ref. [[#13.3.2.2. Seams | Article 13.3.2.2.]]).
</li></ol>
<li>In addition to the above requirements, cap (coping) flashing installed on ''parapets''
<ol>
<li>must be secured to the outside face of the ''parapet'' with a cleat (wind clip) that hooks into the ''drip edge'' or hem of the cap flashing (See [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1., "Fabrication"]]; see also '''Figure 13.3.2.3.-A''').
<li>shall be secured along the roof-side of the ''parapet'' using either cleats (wind clips) or cladding fasteners (the method used shall be specified by the ''Design Authority'' or, when required, by a ''registered professional''), and
<li>shall not be secured to the outside face of a ''parapet'' with exposed fasteners.
</li></ol>
<li>Cleats (wind clips) shall be secured to the vertical face of a ''parapet'' and shall not be mechanically attached to the top face unless otherwise permitted in this Standard or by a written Variance from the '''''Guarantor'''''.
<li>Where cleats (“wind clips”) are required, they must
<ol>
<li>conform to the fabrication requirements in [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1.]], and
<li>be fastened as close to the bottom edge (hook) as practical but must not be fastened further than a maximum of {{hilite | 25.4 mm (1") from the bottom edge (hook).
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.3.-A General requirements for cap flashing securement''' Forming Part of Article 13.3.2.3. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.3.-A.png|link=https://rpm.rcabc.org/images/b/b9/Part_13_-_Illustration_-_Figure_13.3.2.3.-A.png | 600 px]]
|}
 
<li>The securement of ''parapet'' cap (coping) flashings longer than 3048 mm (10’) shall conform to stamped, engineered shop drawings produced by a ''registered professional'' retained by the ''Contractor''; all shop drawings shall form part of the submittal package required in [[#1.3.2.4. Contractor Submittals | Article 1.3.2.4., “Contractor Submittals”]].
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.3.-B Spacing of gasketed fasteners used on roof-side face of cap flashing''' Forming Part of Article 13.3.2.3. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.3.-B.png|link=https://rpm.rcabc.org/images/d/d7/Part_13_-_Illustration_-_Figure_13.3.2.3.-B.png | 600 px]]
|}
 
<li>Cap (coping) flashings installed on ''control joints'' (area dividers) and fire separation ''walls'' (Ref. Article 10.3.4.4. of the applicable ''waterproofing roof'' Standard) shall conform to the requirements in Sentence (2), and
<ol>
<li>may be face-fastened, provided the area divider or fire separation ''wall'' is less than 1 m (39") tall, but
<li>shall be secured with hidden clips on both sides when the area divider or fire separation ''wall'' exceeds a height of 1 m.
</li></ol>
<li>When using exposed screws to secure cap (coping) flashing is permissible, screws shall be located no more than 25.4 mm (1") above the break for the ''drip edge'' and provision shall be made for metal expansion and contraction (See [[Notes to GLW Standard#A-13.2.2.1.(4) | Note A-13.2.2.1.(4)]] and '''Figure 13.3.2.3.-C''').
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.3.-C Securement of cap flashing on exterior face of parapet wall''' Forming Part of Article 13.3.2.3. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.3.-C.png|link=https://rpm.rcabc.org/images/3/30/Part_13_-_Illustration_-_Figure_13.3.2.3.-C.png | 600 px]]
|}
 
<li>Exposed fasteners used to secure the waterproofing side face of cap flashing longer than 3048 mm (10’) shall be equally spaced along the length of the flashing but shall not be further apart than 762 mm (30”).
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.3.-D Securement of cap flashing on waterproofing side of parapet wall''' Forming Part of Article 13.3.2.3. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.3.-D.png|link=https://rpm.rcabc.org/images/0/01/Part_13_-_Illustration_-_Figure_13.3.2.3.-D.png | 600 px]]
|}
 
<li>'''Continuous concealed clips''' must be attached with fasteners spaced nor more than 304.8 mm (12") O.C.
<li>'''Discontinuous concealed clips''' must
<ol>
<li>consist of a single clip, centered between the seams of each length of metal flashing,
<li>measure at least 1/3 of the length of flashing it will secure but shall not be less than 101.6 mm (4") in length, and
<li>be fastened with screws spaced no more than 304.8 mm (12") O.C.
</li></ol>
<li>Fasteners used to secure any cap, counter, or base flashing must be evenly spaced between seams along each length of flashing, and shall be
<ol>
<li>no fewer than three (3) fasteners for every 3048 mm (120") length of metal flashing ('''Figures 13.2.3.3.-B''' and '''13.3.2.3.-D'''), or
<li>two (2) fasteners for every 2438.4 mm (96") length of metal flashing.
</li></ol>
<li>When cap (coping) flashings span widths greater than 304.8 mm (12”), and a flat butt seam is specified, the cap flashing must be riveted to the saddle to ensure adequate securement, and the rivets must be no further apart than 203.2 mm (8”) (See '''Figures 13.3.2.2.-A''' and '''13.3.2.2.-B''').
<li>Parapets that intersect a wall must be flashed with a metal saddle flashing, as shown in the "Construction Details for Linear Metal Flashings" ([[Division_D | Division D]]).
<li>When the outside face of a cap flashing is concealed by a wall assembly, only the outside face may be lap-seamed, provided the overlap is no less than 101.6 mm (4”) and the overlapping metal is embedded in mastic.
<li>Counterflashing must be secured to the vertical face, with fasteners or a reglet.
<li>Counterflashing and termination bars installed as primary securement or protection of membrane flashing
<ol>
<li>must be hemmed at the top edge and bent (broken) outward from the face of the wall by at least 45°, to form a groove for sealant (The hem shall measure at least 15.88 mm (5/8”) when measured from the break),
<li>shall be attached to the substrate with fasteners spaced no more than 304.8 mm (12”) O.C., and
<li>must be sealed along the top groove with a continuous bead of acceptable sealant, tooled to shed water away from the wall.
</li></ol>
<li>A second counterflashing (to cover a term bar or primary counterflashing)
<ol>
<li>applied as a “surface reglet” must be hemmed, broken, and sealed, as described above in this Article, and
<li>must be secured with fasteners spaced no more than 304.8 mm (12”) O.C., but this spacing may be increased to no more than 609.6 mm (24”) O.C., provided the flashing maintains continuous contact with the substrate (See [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]).
</li></ol>
<li>Base flashings
<ol>
<li>must be installed so that the bottom of a drip or hemmed edge is kept at least 25.4 mm (1") above the filtration layer and drainage course of an insulated ''waterproofing assembly'' or any ''overburden'' (see '''Figure 13.3.2.3.-E.'''),
<li>must be secured with fasteners spaced no more than 304.8 mm (12”) O.C., and
<li>may be fashioned as one piece, or as a 2-piece flashing that includes a lower, detachable segment to facilitate ''waterproofing system'' maintenance.
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.3.-E Base metal wall flashing''' Forming Part of Article 13.3.2.3. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.3.-E.png|link=https://rpm.rcabc.org/images/7/7b/Part_13_-_Illustration_-_Figure_13.3.2.3.-E.png | 800 px]]
|}

<li>''Linear metal flashing'' secured in a ''reglet'' (cut groove) must be
<ol>
<li>installed above the membrane flashing,
<li>inserted into the ''reglet'' at least 12.7 mm (1/2”),
<li>friction-fitted within the ''reglet'' or secured on the exposed face with an acceptable fastener, and
<li>sealed with a continuous bead of tooled gunnable sealant.
</li></ol>
<li>Where parallel and overlapping reglet flashings are used, the joints between flashing segments must be offset by at least 304.8 mm (12”), except at corners.
</li></ol>

====13.3.2.4. Reserved====

====13.3.2.5. Reserved====

<hr>
<div id=PART_14></div>

=Part 14 - Waterproofing as a Platform=
==Section 14.1. Design==
(This Part covers the design and installation requirements for ''waterproofing assemblies'' that support an ''overburden'', which may be structurally supported or directly supported by the ''waterproofing assembly'')

(See [[Notes to GLW Standard#A-14.1. | Note A-14.1.]])

===14.1.1. General===
====14.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====14.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Overburden'' means any material, structure or item of equipment that is placed on top of (but not fastened to or through) a ''waterproofing system'' (roof, or at grade). Gravel or pavers are considered ''overburden'' when they do not function as securement for the ''waterproofing assembly''.
<li>''System Coverings'' means (without limitation) gravel, wearing surfaces, landscaping, pavers, cast-in-place concrete, and rubberized surfaces, broadly covering and directly superimposed on the ''waterproofing assembly'' (See [[Notes to GLW Standard#A-14.1. | Note A-14.1.1.2.(1)]]).
<li>''Structures and Equipment'' means structurally supported or portable objects including (without limitation) wood or composite decks and walkways, planters, "amenity spaces" (inclusive of furnishings, hot tubs, gazebos, pergolas, and play areas), nets and wind screens, photovoltaics, satellite equipment, light standards, lightning rods, sculptures, pools, and other water features.
</li></ol>
</li></ol>

===14.1.2. Guarantee Term Requirements===
====14.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====14.1.2.2. Reserved====

====14.1.2.3. Reserved====

===14.1.3. All Systems===
====14.1.3.1. Coverage and Limitations====

<ol>
<li>Coverage under the '''''RoofStar Guarantee''''' shall be as described in [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]]
</li></ol>

====14.1.3.2. Loads====

<ol>
<li>The building structure must be designed to support any live loads specified by the Code having jurisdiction, including loads from any ''system covering'', amenity space, structure, or live loads superimposed upon the ''waterproofing assembly''.
<li>Structural supports (i.e., curbs) should be considered to bear heavier dead loads, to resist ''specified wind loads'', or to secure the equipment during seismic events.
</li></ol>

====14.1.3.3. Securement of System Coverings, Structures, and Equipment====

<ol>
<li>The ''Design Authority'' is responsible for specifying the appropriate securement design of ''system coverings'', structures, and equipment, to resist ''specified wind loads''.
<li>Where structural securement is desirable or required,
<ol>
<li>structural supports must be fully waterproofed (curbs, sleepers, posts) and
<li>the superimposed structure or equipment must be secured to the structural support at least 203.2 mm (8”) above the ''drainage plane'' (See [[#Part 12 - Penetrations and Curbs | Part 12 - Penetrations and Curbs]], and [[#Part 3 - Securing the Roof Assembly | Part 3 - Securing the Roof Assembly]]).
</li></ol>
</li></ol>

====14.1.3.4. Design for Repairs and Renewal====

<ol>
<li>Each design should, without limitation, include consideration for
<ol>
<li>the inevitability of ''waterproofing system'' repairs or replacement,
<li>access for maintenance, and
<li>material removal, storage, and replacement logistics.
</li></ol>
</li></ol>

====14.1.3.5. Waterproofing Membranes====

<ol>
<li>Membranes must be selected for their ability to resist accidental puncture by human activity on the ''waterproofing assembly''; except for hot fluid-applied rubberized asphalt, the minimum puncture resistance must be at least 400 N (See Table 9.2.1.1. in [[#9.2.1.1. Membrane Composition, Thickness, and Selection | Article 9.2.1.1.]]).
</li></ol>

====14.1.3.6. Membrane Protection====

<ol>
<li>Membranes must be protected from damage incurred
<ol>
<li>during the construction of a building,
<li>from normal use and occupancy of the ''deck'' protected by the ''waterproofing system'', and
<li>from maintenance of any installation on top of a ''waterproofing system'', after the building has been commissioned.
</li></ol>
<li>Where membranes installed on vertical surfaces may be damaged from foot traffic or shifting coverings, they must be protected (i.e., with base metal flashing; ref. [[#13.1.3.6. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.1.3.6.]]).
</li></ol>
</li></ol>

====14.1.3.7. Membrane Integrity Testing and Electronic Leak Detection====
(See [[#1.1.3.3. Membrane Integrity Testing | Article 1.1.3.3.]] and [[#1.1.3.4. Electronic Leak Detection | Article 1.1.3.4.]])

====14.1.3.8. Drainage====

<ol>
<li>''Waterproofing assemblies'' that will be covered with ''overburden'', including amenity spaces or equipment, must promote unimpeded drainage of storm or irrigation water.
<li>Where a ''system covering'' material naturally drains (i.e., gravel), no additional drainage design is required, but when it does not naturally drain, or when the ''system covering'' may introduce a “vapour closed” condition, the system shall conform to the requirements in [[#7.1.6.2. Drainage Mats and Filter Fabric | Article 7.1.6.2.]]
<li>''Overburden'' must be contained with drain guards, rigid barriers, and filter fabric (See also [[#11.3.2.3. Drain Protection Against Blockage | Article 11.3.2.3.]]).
<li>To facilitate the adequate movement of water and minimize or prevent damming when non-structural supports are oriented perpendicular to (across) the direction of drainage, the design must
<ol>
<li>specify shorter supports, to a maximum length of 1219.2 mm (48"), and
<li>incorporate drainage mats beneath supports longer than 1219.2 mm (48") in any direction.
</li></ol>
<li>Equipment installed on structural supports, or on top of the ''waterproofing system'', must be spaced or located to promote access to ''drains'', ease of maintenance, and worker or occupant safety.
</li></ol>

====14.1.3.9. Filter Fabric====

<ol>
<li>Filter fabrics are required when the ''waterproofing assembly'' supports
<ol>
<li>any ''overburden'', including landscaping,
<li>sand and other fine materials,
<li>gravel with a diameter less than 12.7 mm (1/2”),
<li>wet mortar or concrete, or
<li>XPS insulation above the membrane (See [[Notes to GLW Standard#A-14.1.3.9. | Note A-14.1.3.9.]]).
</li></ol>
</li></ol>

====14.1.3.10. Decorative Stone (Aggregate Rock) Covering====
(See [[Notes to GLW Standard#A-14.1.3.10. | Note A-14.1.3.10.]])

<ol>
<li>When smooth stone (aggregate rock) is specified as the ''system covering'' (different from ballast),
<ol>
<li>only washed gravel may be used, and
<li>the design must include gravel guards around ''drains''.
</li></ol>
<li>When the aggregate rock used as a ''system covering'' is crushed, or is smaller than 12.7 mm (1/2”),
<ol>
<li>a geotextile protection layer must be installed immediately above the waterproofing membrane, and
<li>the crushed aggregate must be deep enough to hold the geotextile protection layer in place.
</li></ol>
</li></ol>

====14.1.3.11. Wearing Surfaces====
(See also [[#9.1.3.4. Membrane Protection | Article 9.1.3.4.]] concerning wearing surfaces and drainage requirements)

<ol>
<li>Any wearing surface may be installed on an ''uninsulated assembly'', provided
<ol>
<li>the wearing surface does not bond with or touch the field waterproofing membrane or membrane flashing, and
<li>drainage of storm or irrigation water is not impeded.
</li></ol>
<li>When a wearing surface is specified,
<ol>
<li>it must incorporate measures to protect the waterproofing membrane from damage,
<li>perimeter membranes and penetrations must be protected from abrasion by the wearing surface,
<li>the design must provide a drainage space below the wearing surface measuring at least 12.7 mm (1/2”) in depth, and
<li>the design must provide a vertical drainage gap between the wearing surface and any openings.
</li></ol>
<li>Accessible wearing surfaces that permit relatively easy access to the waterproofing membrane, for serviceability and repairs, are strongly recommended.
<li>When cast-in-place concrete is specified as the wearing surface (See [[Notes to GLW Standard#A-14.1.3.11. | Note A-14.1.3.11.]]), the design must conform to the other requirements in this Article, and the membrane, including membrane flashing, must be kept separate from the concrete with
<ol>
<li>a bond-breaking material, such as a proprietary drainage mat or XPS insulation, and
<li>filter fabric or a barrier material acceptable to the membrane manufacturer, able to prevent the concrete slurry from reaching the membrane.
</li></ol>
<li>Scoring solid cast-in place concrete protection slab (split-slab) and asphalt paving wearing courses, using straight surface score lines (indents) spaced no more than 2 m (78-3/4”) apart, formed in a grid pattern (squares, rectangles, diamonds, etc.), is recommended to facilitate cutting for removal of wearing course sections, to locate possible breaches in membranes; the casting and scoring of concrete wearing courses is the work of others).
</li></ol>

====14.1.3.12. Reserved====

====14.1.3.13. Structures and Equipment====

<ol>
<li>Non-structural installations superimposed on a ''waterproofing assembly'' (See '''Figure 14.1.3.13.-A''')
<ol>
<li>are recommended for smaller installations, to
<ol>
<li>minimize the number of penetrations, curbs, or sleepers necessary for structural securement,
<li>eliminate possible weak points in the ''waterproofing system'', where a leak may occur,
<li>avoid dedicated mechanical drainage, and
<li>simplify removal of materials when membrane repairs are required.
</li></ol>
<li>must take into account inevitable ''waterproofing system'' renewal (see [[Notes to GLW Standard#A-14.1.3.13. | Note A-14.1.3.13.]]),
<li>shall be designed for stability and able to resist movement, including seismic movement, but shall not be anchored into the ''waterproofing system'',
<li>must be placed on an appropriate protection layer or supported by pedestals, pavers, or other means of distributing weight and point loading, or placed on
<ol>
<li>a suitable drainage layer conforming to [[#14.2.1.4. Drainage Materials | Article 14.2.1.4.]], and
<li>an appropriate protection layer, and
</li></ol>
<li>may be placed on an insulated ''waterproofing system'' provided the insulation will support all anticipated dead loads, live loads and point loads (See [[#14.1.3.2. Loads | Article 14.1.3.2., "Loads"]]).
</li></ol>
<li>When “structural” ''walls'', planters, equipment pads, and other installations are
<ol>
<li>'''cast-in-place concrete''' without a pre-curb, they may be formed, reinforced, and poured directly on the slab, before it is waterproofed, but they must then be fully enveloped with waterproofing membrane (See '''Figure 14.1.3.13.-B''').
<li>'''cast-in-place concrete''' and are formed, reinforced, and poured over a pre-curb as described and required in this Article (See '''Figure 14.1.3.13.-C'''),
<ol>
<li>the pre-curb must be fully enveloped with waterproofing membrane, as part of the primary waterproofing, and
<li>the inside of planter ''walls'' must be sealed with waterproofing membrane as required in [[#14.3.2.7. Structures and Equipment | Article 14.3.2.7.]]
</li></ol>
<li>'''masonry''' (See '''Figure 14.1.3.13.-D'''), they must be anchored to the structural ''deck'' with internal reinforcement but may be waterproofed using either of the methods described for cast-in-place elements.
<li>'''pre-cast''', they must be secured
<ol>
<li>to a pre‐curb that is continuously waterproofed as a continuation of the primary waterproofing membrane, or
<li>to structural supports that are waterproofed in keeping with the requirements in [[#Part 12 - Penetrations and Curbs | Part 12]].
</li></ol>
</li></ol>
<li>When concrete ''walls'' or structures are constructed without a pre-curb, all concrete surfaces must be fully and continuously enveloped with the primary waterproofing membrane (See also [[Guarantee#3.2.1.3. Excluded Causes of Leaking | Division A, Article 3.2.1.3. Excluded Causes of Leaking]]).
<li>Pre‐curbs must be
<ol>
<li>at least 101.6 mm (4") in height above the ''drainage plane'' of the highest adjacent ''waterproofing assembly'' (See [[Notes to GLW Standard#A-14.1.3.13.(4) | Note A-14.1.3.13.(4))]],
<li>completely enveloped with fully adhered acceptable membrane flashing (including all faces of drainage knock‐outs),
<li>reinforced with dowels epoxied into the pre-curb (see [[#14.3.2.7. Structures and Equipment | Article 14.3.2.7.]]), and
<li>properly waterproofed around dowels in their final position, using
<ol>
<li>a 2-component catalyzed polymethyl methacrylate (PMMA) or polyurethane methyl methacrylate (PUMA) reinforced liquid membrane flashing system, or
<li>two cured coats of an RGC-accepted polyurethane or silicon-based single-component liquid flashing system (See [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6., "Liquid Membrane Flashing"]]).
</li></ol>
</li></ol>
<li>Every planter design must be designed to drain water out of the planter.
<li>Structural planters that adjoin
<ol>
<li>an uninsulated ''waterproofing assembly'' may be drained with
<ol>
<li>a plumbed mechanical ''drain'', or
<li>drainage knock-outs in the pre-curb ''wall'', which should be wide enough to allow for the free flow of water over or past of the membrane flashing plies.
</li></ol>
<li>an insulated ''waterproofing assembly'' shall be drained by only plumbed mechanical drains; knock-outs through a pre-curb are not permissible.
</li></ol>
<li>A design review is advisable when a structural water feature incorporates penetrations for wiring, lights, or other submerged features.
<li>Tiles or other architectural finishes may be applied to the waterproofing membrane, subject to a written Variance from the '''''Guarantor''''' and approval by the membrane manufacturer (See [[#1.1.3.6. Variances | Article 1.1.3.6., "Variances"]]).
<li>''Drains'', re-circulation inlets, and outlets used in water features, must include clamping rings, and must be sealed to the membrane ''assembly''.
<li>When a leak detection system is specified, only non‐ferrous metal ''drains'' may be used.
</li></ol>
</li></ol>
</li></ol>

==Section 14.2. Materials==
===14.2.1. Material Properties===
====14.2.1.1. Field and Flashing Membranes====

<ol>
<li>Refer to Article 9.2.1.1. of the published RGC Standard for the specific membrane:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>Single and 2-component liquid membrane flashing systems used on any detail, including pre-curbs, must be listed in [[Division_C | Division C]], and must be proprietary to, or accepted by, the ''manufacturer''.
</li></ol>

====14.2.1.2. Membrane Protection====

<ol>
<li>Refer to [[#9.3.2.7. Protection of Membranes | Article 9.3.2.7.]]
</li></ol>

====14.2.1.3. Reserved====

====14.2.1.4. Drainage Materials====

<ol>
<li>Drainage mats, geo-synthetic drainage cores, and geo-composites used beneath any non-vegetated ''overburden'' and above insulation (when it is specified),
<ol>
<li>may be manufactured with a factory laminated filter fabric, which are designed to resist damage from the weight of the specified ''overburden'',
<li>should be
<ol>
<li>molded (dimpled) or woven plastic grids with a minimum thickness (depth) of 9.5 mm (3/8") thick, and
<li>designed to provide uniform support as well as traffic-bearing properties for overburdens and wearing courses, and
</li></ol>
<li>must be
<ol>
<li>acceptable to manufacturers of both the membrane and insulation,
<li>suitable for the installed ''system covering'',
<li>selected for their ability to support dead loads, live loads, and point loads, and
<li>capable of permitting the anticipated flow rate of water.
</li></ol>
</li></ol>
<li>Proprietary geocomposite and geosynthetic panels must be designed with sufficient compressive strength to support the design load of ''overburdens'' as well expected live loads and be acceptable for use by th''e membrane manufacturer''.
</li></ol>

====14.2.1.5. Insulation and Insulation Overlays====
(See [[#Part 7 - Insulation | Part 7, "Insulation"]], and [[#Part 8 - Insulation Overlays | Part 8, "Insulation Overlays"]])

<ol>
<li>All insulation specified for use in a ''waterproofing system'' must be XPS and shall conform to the requirements in [[#7.2.2.1. Extruded Polystyrene Insulation | Article 7.2.2.1.]] and shall be capable of supporting any superimposed loads.
<li>When XPS (with or without a concrete topping) is specified as the drainage layer, it must be grooved (by the manufacturer, or as a post-manufacturing alteration).
</li></ol>

====14.2.1.6. Filter Fabric====

<ol>
<li>Filter fabrics that are not factory-bonded to a drainage layer must be
<ol>
<li>acceptable to the ''manufacturer'',
<li>suitable for the installed ''system covering'',
<li>selected for their ability to support dead loads, live loads, and point loads, and
<li>capable of permitting the anticipated flow rate of water.
</li></ol>
<li>Fabric filter mats must be
<ol>
<li>water permeable and have proven long term weather resistance, and
<li>strong enough to withstand traffic abuse and prevent displacement of insulation boards under flotation conditions.
</li></ol>
</li></ol>

====14.2.1.7. Decorative Stone (Aggregate Rock) Covering====

<ol>
<li>Decorative stone (aggregate rock) (See [[Notes to GLW Standard#A-14.1.3.10. | Note A-14.1.3.10.]]) must be washed and may be smooth or crushed.
<li>Large grade stone may withstand wind scour more effectively than smaller stone, but the ''Design Authority'' must determine the gradients, based on the ''specified wind loads'' for the ''waterproofing assembly'' (See also Article 3.2.2.3. Stone (Gravel) Ballast in the related waterproofing roof Standard).
</li></ol>

====14.2.1.8. Pavers and Pedestals====

<ol>
<li>Pavers that are partially supported (i.e., with pedestals) must be capable of resisting anticipated loads.
<li>Pedestals
<ol>
<li>must provide airflow for drying surfaces and assist in leveling,
<li>must be purpose-made and include an integral spacer rib no more than 4.76 mm (1/8”) wide, to uniformly separate pavers,
<li>should not impede the flow of water or air,
<li>should uniformly distribute the dead load of pavers and predicted live loads, and
<li>should be adjustable when a level surface is required, and
</li></ol>
</li></ol>

==Section 14.3. Application==
===14.3.1. Guarantee Term Requirements===
====14.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====14.3.1.2. Reserved====

===14.3.2. All Systems===
====14.3.2.1. Membranes and Membrane Protection====

<ol>
<li>Membranes and membrane flashing must be installed in keeping with the requirements found elsewhere in this Standard.
<li>Protection of waterproofing membranes from mechanical damage caused by tools, accident or the work of others is mandatory during the installation and maintenance of any ''system covering'' or living space (See also [[#9.1.3.4. Membrane Protection | Article 9.1.3.4. Membrane Protection]], for related requirements).
</li></ol>

====14.3.2.2. Filter Fabric====

<ol>
<li>Fabric filter rolls must be
<ol>
<li>at least 2489.2 mm (98") wide,
<li>installed loose-laid (un-bonded) over the insulation and below any type of ballast or ''system covering'',
<li>overlapped at all edges a minimum of 304.8 mm (12"),
<li>slit to fit over penetrations,
<li>cut out around ''drains'' and other openings,
<li>carried up all vertical transitions (including penetration flashings) above the ''finished system surface'' at least 76.2 mm (3”),
<li>loosely held in place behind metal counterflashings or ''wall'' finishes, at all perimeter edges and curbs, and
<li>secured around penetration flashings.
</li></ol>
</li></ol>

====14.3.2.3. Drainage====

<ol>
<li>The location of the drainage layer(s) shall conform to the requirements in [[#Part 7 | Part 7]].
<li>A second drainage layer may be installed above the insulation, but this is at the discretion of the ''Design Authority''.
<li>Specialized proprietary drainage products must be acceptable to the ''manufacturer''.
</li></ol>

====14.3.2.4. Decorative Stone (Aggregate Rock) Covering====

<ol>
<li>When decorative stone (aggregate rock) is specified as a ''system covering'', only washed stone may be used.
<li>Ballast guards must be installed around all ''drains'' (See [[#11.3.2.3. Drain Protection Against Blockage | Article 11.3.2.3.]]).
<li>Crushed stone specified as a ''system covering'' must be
<ol>
<li>installed over a geotextile protection layer, or its equivalent, when the stone is crushed or smaller than 12.7 mm (1/2”) in diameter, and
<li>must be applied with sufficient volume to hold down the protection layer against displacement by wind.
</li></ol>
</li></ol>

====14.3.2.5. Wearing Surfaces====

<ol>
<li>Pavers on pedestals promote free subsurface drainage at the membrane level and are therefore strongly recommended whenever practical.
<li>Pavers and unit-type masonry, such as brick or stone, must be supported by
<ol>
<li>proprietary (purpose-made) pedestals with at least a 4.76 mm (1/8”) integral spacer ribs for uniform spacing of pavers,
<li>a proprietary drainage layer overlaid with a filter fabric mat, or
<li>a drainage layer of loose aggregate (such as pea gravel) measuring at least 25.4 mm (1") in depth, installed over a filter fabric.
</li></ol>
<li>Pedestals, or a drainage layer,
<ol>
<li>shall be installed above the filtration layer, which may be laid over a membrane protection layer (in an uninsulated system) or over XPS insulation,
<li>must permit at least 12.7 mm (1/2″) of vertical separation between the paver and the underlying substrate, to provide airflow for drying surfaces and assist in leveling, and
<li>should not impede the flow of water or air, and should uniformly distribute the dead load of pavers, and other unit masonry products, as well as predicted live loads.
</li></ol>
<li>Pedestals shall be installed above the filtration layer, which may be laid over a membrane protection layer (in an uninsulated system) or over XPS insulation.
<li>Cast-in-place concrete installed directly above the roof membrane must be separated from the membrane and its protection layers with material and a filter fabric or barrier material specified by the ''Design Authority'' and conforming to the requirements in [[#14.1.3.11. Wearing Surfaces | Article 14.1.3.11.]]
</li></ol>

====14.3.2.6. Reserved====

====14.3.2.7. Structures and Equipment====

<ol>
<li>Structures must conform to the requirements in [[#14.1.3.13. Structures and Equipment | Article 14.1.3.13.]]; structures that do not conform must be reviewed with the ''Design Authority'' before waterproofing.
<li>Pre‐curbs (Figure 14.3.2.7.-A) must
<ol>
<li>achieve a finished height at least 101.6 mm (4") above the drainage plane of the highest adjacent waterproofing assembly (For an example of this see Construction Detail "Structural Planter"), and
<li>be completely enveloped with fully adhered acceptable sheet or liquid membrane flashing (including all faces of drainage knock‐outs).
</li></ol>
<li>All planters and water features must be fully waterproofed on the inside; sheet membrane installation must conform to the requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]], and liquid membrane flashing shall conform to the requirements in [[#10.3.3.4. Liquid Membrane Flashing | Article 10.3.3.4.]]
<li>All membrane flashing shall terminate
<ol>
<li>on the outside face of the planter wall, at least 50.8 mm (2”) below the upper edge, or
<li>on the inside face of the planter wall with a cut reglet ''linear metal flashing'', caulked with sealant and installed no less than 50.8 mm (2”) above the top surface of growing media.
</li></ol>
<li>Structural installations that do not incorporate pre-curbs must be fully enveloped with membrane, which shall be installed to conform to Article 10.3.2.3.
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 14.3.2.7.-A Pre-curbs and Sheet Membrane Flashing''' || 2025-October-25 }} {{hilite | Forming Part of Article 14.3.2.7. || 2025-October-25 }} (Click to expand illustration)
|-
| [[File:SBS Figure 14.3.1.jpg|link=http://rpm.rcabc.org/images/5/5b/SBS_Figure_14.3.1.jpg | 450 px]]
|}

<li>Dowels (reinforcement bar) should be
<ol>
<li>inserted into the pre‐curb after application of sheet membrane flashing, and
<li>waterproofed in their final position, where they penetrate the pre-curb.
</li></ol>
<li>When dowels are installed prior to the application of sheet membrane flashing, membrane flashing must be applied over the ''curb'' and around the dowels, and the dowels shall be waterproofed with an RGC-accepted, reinforced 2-component liquid membrane flashing system.
<li>Dowels must be waterproofed with
<ol>
<li>a single application of an RGC-accepted reinforced 2-component liquid membrane flashing, or
<li>two (2) applications of a single-component liquid membrane flashing,
<ol>
<li>applied to properly prepared surfaces,
<li>fully cured between coats,
<li>in keeping with the application requirements in [[#10.3.3.4. Liquid Membrane Flashing | Article 10.3.3.4.]], for 2-component reinforced liquid membrane flashing, or the manufacturer’s instructions, when using a single-component liquid membrane flashing, and
<li>applied no less than 50.8 mm (2”) on vertical surfaces and in a radius around the base of each dowel.
</li></ol>
</li></ol>
<li>When structures or equipment exceed the limits stated in [[Guarantee#3.2.1.6. Removal and Reinstatement of Overburden | Division A, Article 3.2.1.6. Removal and Reinstatement of Overburden]], a membrane integrity scan and any resulting repairs must be undertaken before the membrane is covered.
</li></ol>

<hr>
<div id=NOTES></div>

=[[Notes to SBS Standard | Notes to Standard]]=

</div>
</div>
<div class="col-md-12">

[[RCABC Roofing Practices Manual| Home]]
</div>

{{Template:RPM Page Footer with Copyright and Current Date}}

(Draft) RGC Standard for Grade-level Waterproofing Systems

2026-06-19T21:42:42Z

James Klassen: /* 2.1.3.1. General Requirements for Roof Slope */

__NONUMBEREDHEADINGS__
<div class="row">

{{DISPLAYTITLE:{{FULLPAGENAME}}}}
<div class="row">

<div class="col-md-3" style="float:right;" id="tocDiv">
<div class="noautonum">__TOC__</div>
</div> 

<div class="col-md-9" id="mainBodyDiv">

<big><big>Division B - Standards</big></big> 
<big>Other Waterproofing Systems</big> 

<hr>
<big><big><big><big><big><big>RGC Standard for Grade-level Waterproofing Systems</big></big></big></big></big></big>
<div class="panel panel-primary">
<div class="panel-heading"><big>'''About the Standard'''</big></div>
<div class="panel-body">
This Standard is a consolidation of requirements previously published in the Roofing Practices Manual for all waterproofing systems applied to structural decks at or touching grade. It is comprised of fourteen (14) Parts that contain the requirements, guiding principles, recommendations, and informative materials necessary for a roof to qualify for a '''''RoofStar 5-Year Guarantee''''' or '''''RoofStar 10-Year Guarantee'''''.

Notes to the Standard are hyperlinked from each Part and can be read by using the link in the Table of Contents for the Standard. Highlighted text within the body of the Standard indicates revisions made within the last twelve (12) months.

This Standard follows a specific structure, incorporates defined terms, and utilizes coloured text to denote specific meaning; this is explained in [[Structure_and_Organization_of_RPM_and_Standards | Division A, Part 2, "Structure and Organization of RPM and Standards"]]. When the requirements in this Standard conflict with other resources found either in this Manual or in ''manufacturer's'' published instructions, the rules for Authority and Conflict in [[Structure_and_Organization_of_RPM_and_Standards#2.3.1.2._Authority_and_Conflict | Division A, Article 2.3.1.2.]] shall be applied.

Readers are advised to review relevant materials that can be accessed through the hyperlinks embedded in the body of text.

<div class="col-md-12">
</div>
<hr>
<div class="col-md-4">
</div>
<div class="col-md-4">

:::{|
|-
! <div style="text-align:center;"><big><big>Table of Contents</big></big></div>
|-
| [[#PART_1 | Part 1 - General]]
|-
| [[#PART_2 | Part 2 - Supporting Structures: Decks and Walls]]
|-
| [[#PART_3 | Part 3 - Securing the Waterproofing Assembly]]
|-
| [[#PART_4 | Part 4 - Materials]]
|-
| [[#PART_5 | Part 5 - Deck and Wall Overlays]]
|-
| [[#PART_6 | Part 6 - Air and Vapour Controls]]
|-
| [[#PART_7 | Part 7 - Insulation]]
|-
| [[#PART_8 | Part 8 - Reserved]]
|-
| [[#PART_9 | Part 9 - Membrane System Field]]
|-
| [[#PART_10 | Part 10 - Perimeters and Walls]]
|-
| [[#PART_11 | Part 11 - Drainage]]
|-
| [[#PART_12 | Part 12 - Penetrations and Curbs]]
|-
| [[#PART_13 | Part 13 - Linear Metal Flashing]]
|-
| [[#PART_14 | Part 14 - Planters and Other Structures]]
|-
| <hr>
|-
| [[Notes to GLW Standard | Notes to Standard]]
|-
|}

</div>
<div class="col-md-12">
<hr>
<div style="text-align:center">
'''First Edition''': January 1, 2010
 '''Previous Edition''': April 5, 2024
 '''Current Edition''': Adopted June 11, 2026
 
All changes to this Standard are effective <big>'''July 1, 2026'''</big>
</div>
<div style="text-align:center">
{{Template:RPM Page Footer with Copyright and Current Date}}
</div>
</div>
</div>
</div>
<div id=PREFACE></div>
=Preface=
In 2010, the RCABC Guarantee Corp. (RGC) launched the RoofStar Guarantee for Waterproofing Systems and its supporting Standard, “Waterproofing Systems – Plazas, Promenades and Terraces”. Today, we call it the RGC Standard for Grade-level Waterproofing Systems. This Standard was substantially revised and adopted June 11, 2026 to align its structure and much of its content with the roofing Standards published in the RCABC Roofing Practices Manual. Although much of the content in this Standard applies to all waterproofing systems, regardless of membrane type, the reader will occasionally find links to membrane-specific content published in the related ''waterproofing roof'' Standards.

Waterproofing is a broad term that means sealing a surface or assembly so that water cannot pass into or through it. Unlike systems that shed water (for example, a metal or asphalt shingle roofs), waterproofing does not depend on gravity. Instead, it is accomplished with materials and methods that resist the transmission of water, even water that accumulates depth and is left standing on the waterproofed surface. However, there are some differences between waterproofing a roof and waterproofing on structural ''decks'' at grade.

Often, structural ''decks'' constructed at grade are not built with slope to drains, and because waterproofing assemblies are not insulated below the membrane, they do not utilize sloped insulation to move water to drains and a drainage system. Hydrostatic pressure is therefore more of a concern than it might be on many roofs (water exerts a pressure of 1000 Kg/m2 per metre of depth, or 62.2 lbs/ft2 per foot of depth). For that reason, only fully adhered membranes are permitted on these assemblies, the membranes are generally thicker than those that can be installed on a roof, the assemblies may be only uninsulated or “protected” (insulated above the membrane), and membrane reinforcement may be restricted to maximize flexibility while minimizing puncture resistance.

Structural concrete slabs at grade are also used differently from roofs. Often, these surfaces are leveraged by the general contractor and other trades for loading and staging materials, running equipment, and processing or fabricating building components. Because these platforms are suspended over occupied space or parking garages, the membranes installed on these ''decks'' must be tough, reliable, and protected, able to withstand abuse and damage. The methods used to install and seal them also must be rigorous. Membranes used in this kind of waterproofing must also be tested for watertightness and, when they are covered by permanent wearing courses, which can be expensive to remove if a leak occurs (for example, patios and gardens around the front entrance of a condominium tower), they must be guarded by an electronic leak detection (ELD) system. In some instances, the use of ELD is a requirement of this Guarantee.

Waterproofing is accomplished with single or multi-ply membrane systems RGC in membranes that are manufactured in various forms – as sheet goods (often packaged and delivered to site in rolls), or as liquid-applied systems, reinforced with a fabric (often polyester).

This Standard is limited to assemblies that are generally for pedestrian access, with limited access by emergency vehicles. It is also limited to structural slabs that touch grade; fully elevated podium ''decks'' are governed by the RGC waterproofing roof Standards. For that reason, a '''''RoofStar Guarantee for Grade-level Waterproofing''''' is not available for parking surfaces, driveways, or foundation walls below grade.

Within the scope of this Standard, much is possible and permissible. However, not everything permissible is necessarily advisable; good judgement must be exercised at the design stage to ensure a ''project’s'' success, and good judgement reaches well beyond what this Standard can address.

As a fully integrated document, every Part of this Standard contains critical requirements that sometimes overlap requirements in other Parts. While numerous requirements are linked internally to related Articles throughout the Standard, not every relationship between requirements is made in this fashion. Therefore, the reader must become familiar with the Standard in its entirety.

- RCABC Technical Services

<div id=PART_1></div>
=Part 1 - General=
==Section 1.1. Design==
===1.1.1. General===
====1.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
<li>In addition to the Scope described in Division A, this Standard applies to the design and construction of new or replacement waterproofing assemblies strictly intended for pedestrian traffic and limited emergency vehicle access strictly (See [[#1.1.1.2. Coverage and Limitations | Article 1.1.1.2.]] for limitations of coverage).
</li></ol>

====1.1.1.2. Coverage and Limitations====

<ol>
<li>Coverage under the '''''RoofStar™ Guarantee''''' shall be as described in Division A, [[Guarantee#3.2.1.1._Guarantee_Terms_and_Coverage | Article 3.2.1.1.]] and [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Article 3.2.1.2.]]
<li>A '''''RoofStar Guarantee''''' for ''waterproofing assemblies'' covers only ''waterproofing systems'' installed on structural ''decks'' that touch grade (the ground), that are strictly intended for pedestrian traffic (plazas, promenades, and terraces) and limited emergency vehicle access; ''waterproofing systems'' applied to or installed on vehicle parking ''decks'' and driveways, below-grade walls, foundations and footings, and repairs or renovations to in-service ''waterproofing systems'', do not qualify for a '''''RoofStar Guarantee''''' for ''waterproofing assemblies''.
</li></ol>

====1.1.1.3. References====

<ol>
<li>In this Standard, all references to
<ol>
<li>the "British Columbia Building Code" (the "Building Code", or the "Code"), to municipal or regional building codes or regulations, or to other standards, presume the current edition that is in force,
<li>materials mean those materials expressly accepted by the '''''Guarantor''''', unless stated otherwise, and
<li>measurements are shown in metric units first, followed by Imperial values (typically in parentheses; see [[Structure_and_Organization_of_RPM_and_Standards#2.1.3.2._Measurements | Division A, Article 2.1.3.2., "Measurements"]]).
</li></ol>
</li></ol>

====1.1.1.4. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part and the Standard:
<ol>
<li>''Design Authority'' means the individual or firm responsible for the issuance of ''project'' specifications and details to which the ''project'' will be bid and constructed. When a ''Contractor'' designs a ''project'', the ''Contractor'' is deemed to be the ''Design Authority''.
<li>''Finished system surface'' means the top surface of any waterproofing or water-shedding system, inclusive of ballast or ''overburden''.
<li>''Grade-level waterproofing system'' means an insulated or uninsulated ''system'', designed and constructed at grade with a sheet or liquid-applied membrane, to exclude water.
<li>''Guarantor'' (used interchangeably with '''''RGC''''') means the '''RCABC Guarantee Corporation''', which offers the '''''RoofStar Guarantee'''''.
<li> ''Linear metal flashing'' means flashings cut and shaped from flat metal stock, to redirect water at roof perimeters and edges, or to control the flow of water in valleys and drainage spillways. ''Linear metal flashings'' also protect roof membranes from weathering and damage and provide an aesthetic finish to the ''waterproofing system'' or ''water-shedding system''.
<li>''Membrane system'' means the combination of field and flashing membranes which function together to waterproof underlying materials and ''systems''.
<li>''Observer'' means a firm or person paid by the building Owner (directly, or through the '''''RGC'''''), who is independent (not a member) of the RCABC, and who is accepted by the '''''RGC''''' to provide Quality Assurance reviews during construction and after completion of the ''project'', according to the terms and conditions set out in RCABC policy.
<li>''Qualified roof condition surveyor'' means a person trained and competent in the use and interpretation of infrared thermographic and electronic moisture scanning equipment, used in the condition assessment of a ''waterproofing system'' or ''water-shedding system''.
<li>''Waterproofing system'' means a sealed, functional arrangement of ''primary materials'' constructed on roofs, plaza ''decks'', or on grade-level slabs (with or without insulation and other related materials), to resist the transmission of liquid water through the system, including water under hydrostatic pressure.
</li></ol>
</li></ol>

====1.1.1.5. Undefined Terms====

<ol>
<li>The following undefined terms are used throughout this Standard and are not formatted differently from the body of text:
<ol>
<li>Grade-level slab is a term that commonly refers to a structural deck conforming to the requirements in [[#2.1.5. Roof Decks | Subsection 2.1.5.]], that directly touches ground (grade) and covers spaces below.
<li>Podium deck is a term that commonly refers to a structural ''deck'' that aligns with [[#2.1.5. Roof Decks | Subsection 2.1.5.]], that touches grade, covers spaces below, supports structures and occupied spaces above it, and is generally limited to pedestrian access and occasional emergency vehicles or seasonal maintenance equipment.
<li>Wearing course is a term that commonly means a hard surface that is installed above the ''waterproofing system'' to resist abrasion and compaction from pedestrian and occasional vehicular traffic; it can be a removable material (“accessible” wearing course, such as pavers), or permanent (“inaccessible”, e.g., a concrete slab poured on top of the ''waterproofing system''.
</ol></li>
</ol></li>

====1.1.1.6. Objectives====

<ol>
<li>Every ''waterproofing system'' shall conform to the more stringent of this Standard or the Building Code or By-law having jurisdiction.
</li></ol>

====1.1.1.7. Responsibility for Design====

<ol>
<li>Each design of a ''waterproofing assembly'' shall be undertaken by a person or persons qualified in the work concerned (See [[#3.1.3.1. Responsibility for Design | Article 3.1.3.1.]] with respect to the securement of the ''roof assembly'').
<li>The ''Coordinating Registered Professional'' is responsible for ensuring the design of the ''vegetated roof assembly'' complies with all applicable building, energy, and fire codes having jurisdiction.
</li></ol>

====1.1.1.8. Pre-Design Requirements====
<ol>
<li>The ''Coordinating Registered Professional'' is responsible to ensure that the design of a ''waterproofing assembly'' is a multi-disciplinary enterprise that aligns with the designs for structural, plumbing, mechanical, electrical, architectural, and building envelope, together with all trades whose work intersects with the ''Contractor’s'' scope of work, to minimize out-of-sequence operations that could compromise the integrity of the completed ''waterproofing assembly''.
</li></ol>

====1.1.1.9. Suitability of Design====
<ol>
<li>The ''Design Authority'' is responsible for determining the appropriate ''waterproofing system'' design and must consider (without limitation)
<ol>
<li>the requirements of the building code having jurisdiction,
<li>the structural capabilities or limitations of the building,
<li>fire resistance and class requirements for the building,
<li>wind loads (See [[#Part 3 - Securing the Roof Assembly | Part 3]] of this Standard),
<li>the effects of nearby structures on the ''waterproofing assembly'',
<li>the potential effects of reflected heat on the ''waterproofing assembly'',
<li>''waterproofing system'' aesthetics, and
<li>maintenance requirements, including the safety of maintenance workers.
</li></ol>
</li></ol>

===1.1.2. Guarantee Requirements===
====1.1.2.1. RoofStar 5-Year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
<li>In addition to Sentence (1), all ''projects'' shall comply with
<ol>
<li>the ''project'' specifications and drawings, and
<li>the ''manufacturer's'' published installation requirements.
</li></ol>
</li></ol>

====1.1.2.2. Reserved====

====1.1.2.3. Quality Control====

<ol>
<li>Notwithstanding any other requirements in this Standard, the ''Contractor'' shall
<ol>
<li>bid the ''project'' to meet the more stringent of this Standard or the ''project'' specifications,
<li>bid the ''project'' to include only RGC-accepted systems and materials,
<li>ensure that the supporting ''waterproofing assembly'' conforms to the requirements and limitations of [[#1.1.3.1. Permitted Roof Systems | Article 1.1.3.1.]],
<li>notify the ''Observer'' at least 24 hours before construction is scheduled to start or resume (72 hours notice is required for ''projects'' further than 100 km from the nearest "Free Zone" city location), and then daily, before work resumes,
<li>ensure that construction conforms to this Standard and exhibits good workmanship,
<li>ensure that samples, reports, shop drawings, ELD arrangements, certificates, manufacturer approvals, warranty documentation, and all other submittals are collected and provided to the '''''Guarantor''''' as required in [[#1.3.2.4. Contractor Submittals | Article 1.3.2.4.]], and
<li>abide by all pertinent RCABC policies.
</li></ol>
</li></ol>

====1.1.2.4. Quality Assurance====
(See [[Notes to GLW Standard#A-1.1.2.4. Quality Assurance | Note A-1.1.2.4.]])

<ol>
<li>Notwithstanding any other requirements in this Standard, the ''Observer'' shall
<ol>
<li>verify that the materials used in construction are accepted by the '''''Guarantor''''' and listed in [[Division C | Division C]] of this ''Manual'',
<li>review the construction of the ''waterproofing system'' (according to the prescribed number of observations, with consideration for the expected duration of construction) for conformance with the more stringent of
<ol>
<li>this Standard,
<li>conditions and limitations in [[Division A | Division A]] of the RPM, as they apply,
<li>the ''manufacturer’s'' published requirements,
<li>the ''project'' drawings and specifications, or
<li>the Building Code having jurisdiction.
</li></ol>
<li>review and report whether the ''Contractor'' has met the RCABC policy requirements noted in this Standard, and
<li>perform cut tests or other acceptable methods, whenever required, to verify that the materials and methods of construction conform to this Standard (for example, this may be required when the ''Contractor'' has completed more than 30 squares of waterproofing without an observation).
</li></ol>
</li></ol>

===1.1.3. All Systems===
====1.1.3.1. Permitted Waterproofing Systems====
(See [[Notes to GLW Standard#A-1.1.3.1. Permitted Waterproofing Systems | Note A-1.1.3.1.]])

<ol>
<li>This Standard applies only to uninsulated or protected ''waterproofing systems'' installed on structural ''decks'' that touch grade; repairs or renovations to in-service ''waterproofing systems'' do not qualify for a '''''RoofStar Guarantee'''''.
</li></ol>

====1.1.3.2. Accessibility for Maintenance====

<ol>
<li>Each ''waterproofing assembly'' should be designed to provide safe access for maintenance of roof drains, corners, or mechanical equipment, where the roof is at least 3 m (10’) above the surface of the ground, or where a hazard to a person exists, should a fall be possible (this principle also applies to roof areas intended for regular occupancy); design elements to mitigate fall hazards should align with the Code having jurisdiction, and with the ''Workers Compensation Act Regulations'', and should include
<ol>
<li>tall parapets,
<li>guardrails, or
<li>tie-off anchors.
</li></ol>
</li></ol>

====1.1.3.3. Membrane Integrity Testing====
(See [[Notes to GLW Standard#A-1.1.3.3. Membrane Integrity Scans | Note A-1.1.3.3.]] and '''Figure 1.1.3.3.-A''')

<ol>
<li>Electrical current membrane integrity testing shall conform to
<ol>
<li>ASTM D7877, "Standard Guide for Electronic Methods for Detecting and Locating Leaks in Waterproof Membranes", or
<li>ASTM D8231, "Standard Practice for the Use of Low Voltage Electronic Scanning System for Detecting and Locating Breaches in Roofing and Waterproofing Membranes."
</li></ol>
<li>An electrical current membrane integrity test is required when anyone other than the ''Contractor'' installs ''overburden'', amenities, or equipment, prior to the installation of any overburden or wearing course (In this Standard, the term "electrical current membrane integrity test" means a test method that uses electrical current and electronic sensing technology to detect breaches in the membrane ''system'').
<li>An electrical current membrane integrity test is required when the ''Contractor'' installs ''overburden'', amenities, or equipment, but only when
<ol>
<li>the total ''project'' area (footprint), inclusive of planters or other waterproofed features, exceeds 18.58 m2 (200 sf), and
<li>''overburden'', amenities, or equipment exceed 152.4 mm (6”) in depth
</li></ol>

<li>An electrical current membrane integrity test must be performed by an RGC-recognized service provider listed in [[Division_C | Division C]].
<li>If flood testing is specified, it shall be conducted prior to the installation of insulation and roof coverings, and must be executed in keeping with ASTM D5957, "Standard Guide for Flood Testing Horizontal Waterproofing Installations".
</li></ol>
</li></ol>
 
::{|
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 1.1.3.3.-A Electronic Integrity Testing''' Forming Part of Article 1.1.3.3. (Click to expand illustration)
|-
| [[File:Figure 1.1.3.3.-A.jpg |link=https://rpm.rcabc.org/images/2/2a/Figure_1.1.3.3.-A.jpg | 800 px]]
|}

====1.1.3.4. Electronic Leak Detection====
(See [[Notes to GLW Standard#A-1.1.3.4. Electronic Leak Detection| Note A-1.1.3.4.]])

<ol>
<li>Electronic Leak Detection (ELD) shall conform to
<ol>
<li>ASTM D7877, "Standard Guide for Electronic Methods for Detecting and Locating Leaks in Waterproof Membranes", or
<li>ASTM D8231, "Standard Practice for the Use of Low Voltage Electronic Scanning System for Detecting and Locating Breaches in Roofing and Waterproofing Membranes."
</li></ol>
<li>Electronic Leak Detection (ELD)
<ol>
<li>is required for all ''waterproofing assemblies'' that are covered with inaccessible ''overburden'',
<li>is strongly recommended for ''waterproofing assemblies'' with accessible ''overburden'',
<li>shall provide detection capabilities for all waterproofing surfaces, and
<li>must extend at least 50.8 mm (2") vertically from the ''drainage plane'' at
<ol>
<li>all transitions,
<li>any point along the entire deck perimeter, and
<li>protrusions.
</li></ol>
</li></ol>
<li>Where the electronic leak detection system utilizes a sensor ribbon (tape) installed on the waterproofing membrane in a grid pattern, the ribbon spacing shall be no more than three (3) metres, measured in any direction, irrespective of the type or depth of ''overburden.''
</li></ol>

====1.1.3.5. Hot Works====

(See [[Notes to GLW Standard#A-1.1.3.5. Hot Works| Note A-1.1.3.5.]])

<ol>
<li>The ''Design Authority'' may specify that the ''Contractor'' must maintain compliance with the RCABC Hot Works Program and consequently manage the Hot Works conducted on site (See [[#1.3.2.1. Hot Works: Contractor Requirements | Article 1.3.2.1.]]).
<li>When the ''project'' involves Hot Work, the ''Design Authority'' must either
<ol>
<li>pre-approve alternate applications already written in this Standard or another applicable Standard published in this ''Manual'', when the specified application is deemed to be fire-sensitive by the ''Contractor'' as part of the risk assessment process, or
<li>provide alternate material and application requirements in the Specification for fire sensitive locations on the ''project''.
</li></ol>
</li></ol>

====1.1.3.6. Variances====

<ol>
<li>When a design is unable to conform to the Standard, the ''Design Authority'' may apply to the RGC for a written Variance.
<li>Application for a written Variance must be made in writing (email correspondence is common), and must
<ol>
<li>identify the ''project'' name and its civic address,
<li>identify the '''''RoofStar Guarantee''''' number (if assigned),
<li>identify the ''Contractor'' (if awarded),
<li>articulate the nature of the design problem,
<li>identify the '''''RoofStar Guarantee''''' requirement to be varied, and state the desired modification (i.e., reduce the requirement for 203.2 mm (8") to 152.4 mm (6")),
<li>cite the reference to which the Variance will apply (i.e., Standard name, article number, sentence number, etc.), and
<li>provide design drawings, photographs, and ''project'' plans, referencing grid lines that identify or articulate the boundaries to which the Variance will be applied.
</li></ol>
<li>Variances are issued by the '''''RGC''''' only to the ''Design Authority'' and will be distributed to the ''Contractor''.
<li>The '''''Guarantor''''' reserves all rights to vary a requirement in a Standard without restrictions, to limit coverage on any part or the whole of a ''project'', or to impose design or construction conditions on a ''project''.
<li>Variances are issued only for the ''project''-specific issue identified in the written request, and do not constitute general permission to depart from the published requirements in this Standard, for any aspect of the same ''project'' or for future ''projects'', designed or constructed by any other firm.
</li></ol>

===1.1.4. Replacement and Alterations===

(The requirements in [[#1.1.3. All Systems | Subsection 1.1.3., "All Systems"]], shall be read together with the following Articles)
(See [[Notes to SBS Standard#A-1.1.4. Alterations and Additions | Note A-1.1.4.]])

====1.1.4.1. General Requirements====

<ol>
<li>Unless expressly permitted otherwise in this Standard, the design for replacement ''waterproofing systems'' shall conform to the requirements for new waterproofing in this Standard.
</li></ol>

====1.1.4.2. Complete Waterproofing System Replacement====

<ol>
<li>Complete ''waterproofing system'' replacement shall conform to the general requirements in [[#1.1.4.1. General Requirements | Article 1.1.4.1.]], unless expressly varied elsewhere in this Standard.
<li>''Waterproofing system'' replacement means the complete removal of membranes, insulation, drainage boards, filtration materials, and metal flashings, replacing them with only new materials.
<li>Where a ''waterproofing system'' ties into air and in-service ''control layers'' in adjacent ''wall'' assemblies, the decision to reuse and repair those ''control layers'' remains the responsibility of the ''Design Authority'' but shall nevertheless be subject to the requirements in [[#Part 6 - Air and Vapour Controls | Part 6, Air and Vapour Controls]] with respect to continuity.
<li>''Waterproofing system'' replacement ''projects'' are eligible to qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', subject to their respective requirements.
</li></ol>

====1.1.4.3. Partial Waterproofing System Replacement====

<ol>
<li>Partial replacement of a ''waterproofing system'' is permissible, but only when the waterproofing membrane and membrane flashing is replaced (other in-service materials may be replaced or retained, as elected by the ''Design Authority''), but coverage under a '''''RoofStar Guarantee''''' is limited to new materials supplied and installed by the ''Contractor''.
<li>Retention of insulation materials in a ''waterproofing system'' is subject to the requirements for insulation in [[#Part 7 - Insulation | Part 7]].
<li>The reinstallation of all retained materials shall conform to this Standard, irrespective of how they were originally installed.

</li></ol>

====1.1.4.4. Membrane Recovering====
(See [[Notes to GLW Standard#A-1.1.4.4. Membrane Recovering | Note A-1.1.4.4.]])

<ol>
<li>Recovering (installing a new ''waterproofing system'' membrane over an in-service membrane system) is not a recommended practice and will limit the scope of coverage under the '''''RoofStar Guarantee'''''.
<li>A '''''RoofStar Guarantee''''' issued for a recovered ''waterproofing system'' membrane is limited strictly to the value of new ''waterproofing system'' materials; in-service materials left in place or reinstated are not covered by the '''''RoofStar Guarantee'''''.
<li>All membrane recovering ''project'' specifications and drawings shall reflect and conform to the construction requirements in [[#1.3.3.4. Membrane Recovering | Article 1.3.3.4.]]
<li>Recovering a ''waterproofing system'' membrane is acceptable to the Guarantor only when the following conditions have been satisfied, together with any other applicable requirements published in this Article or in [[#1.3.3.4. Membrane Recovering | Article 1.3.3.4.]]:
<ol>
<li>the in-service ''waterproofing system'' membrane has never before been recovered (recovering is not permitted over a previously recovered ''waterproofing system'' membrane),
<li>the in-service membrane is free of blisters, damage, seam failures, or breaches, and is still fully bonded to the deck,
<li>in-service or new waterproofing system components installed on top of the recovered membrane must conform to the usual design, material, and construction requirements of this Standard, including wind load requirements,
<li>the recovering specifications, plans, and detail drawings have been provided to, and reviewed by, the Guarantor prior to the tendering of the project,
<li>the Guarantor has issued a written Variance that expressly permits recovering and outlines the conditions and limitations under which recovering may proceed, and
<li>the Design Authority has satisfied the submittal requirements for recovering, in this Standard.
</li></ol>
<li>Before proceeding with roof recovering, the ''Design Authority'' should consider
<ol>
<li>the requirements for moisture testing (described below),
<li>testing securement of materials to be left in place, and
<li>the potential consequences of failure for the building and its use.
</li></ol>
<li>To qualify for a written Variance from the '''''Guarantor''''', the Variance request (See [[#1.1.3.6._Variances |Article 1.1.3.6.]])
<ol>
<li>must identify the type of ''waterproofing system'' to which the Variance pertains (i.e., ''uninsulated'' or ''protected waterproofing system''),
<li>must specify how the in-service ''waterproofing system'' will be physically separated from other roof areas, and
<li>must include the formal independent report that describes the condition of the in-service ''waterproofing system'', and which documents results from cut tests and moisture investigation that are prerequisites for a '''''RoofStar Guarantee'''''.
</li></ol>
<li>In-service ''uninsulated'' and ''protected waterproofing systems'' presented to the '''''Guarantor''''' in a written Variance application by the ''Design Authority'' must be free of blisters and breaches in the membrane.
</li></ol>

====1.1.4.5. Tie-ins, Additions, and Alterations to Existing Waterproofing====

<ol>
<li>When a new ''waterproofing system'' adjoins an in-service ''waterproofing system'' and structural movement between the two is anticipated, an ''expansion joint'' must be used to tie the new system to the in-service system.
<li>If ''project'' conditions do not allow for a ''curb'' joint between new and in-service ''waterproofing systems'', the ''Design Authority'' must submit an alternative design and obtain a written Variance from the '''''Guarantor''''' that permits the elimination of curb joints (see [[#1.1.3.6. Variances | Article 1.1.3.6. Variances]]); any alternative design
<ol>
<li>must include design specifications and construction details showing a positive water cut-off that fully isolates the in-service ''waterproofing system'' from the new ''waterproofing system'', and
<li>shall show how the new ''waterproofing system'' will be easily distinguishable from the existing ''waterproofing system'', and
<li>may be made with the saw-cut method (see [[#1.3.3.5. Tie-ins, Additions, and Alterations to Existing Waterproofing | Article 1.3.3.5.]]), provided the connection between a new ''waterproofing system'' and an in-service ''waterproofing system'' will be free of structural movement.
</li></ol>
<li>Repairs or renovations to an existing ''waterproofing system'' that is not covered by a '''''RoofStar Guarantee''''' do not qualify for a '''''RoofStar Guarantee''''' (the term "renovation" means the removal and replacement of, or the application of a cover to, a portion of the ''waterproofing system'').
<li>Modifications or additions to a ''waterproofing system'' covered by an active '''''RoofStar Guarantee''''' are permissible, subject to various conditions, but must be made by a ''Contractor'' qualified to perform work under the '''''RoofStar Guarantee Program'''''.
</li></ol>

===1.1.5. Reserved===

==Section 1.2. Reserved==

==Section 1.3. Application==
===1.3.1. Reserved===
===1.3.2. All Systems===
====1.3.2.1. Hot Works: Contractor Requirements====

<ol>
<li>The ''Contractor'' must maintain the requirements of the RCABC Hot Works Program, including (without limitation)
<ol>
<li>'''Insurance Coverage''', wherein the limits carried on the ''Contractor’s'' policy must equal or exceed the minimum requirements set by RCABC, and coverage must be unhindered by warranties that limit or exclude coverage when Hot Works is required,
<li>'''Education and training''', since workers who perform Hot Works must be trained by the ''Contractor'' and kept current with acceptable methods,
<li>the [https://free.bcpublications.ca/civix/content/public/bcfc2018/?xsl=/templates/browse.xsl&xsl=/templates/browse.xsl "British Columbia Fire Code"], wherein a Fire Safety Plan, preventative methods or alternative work procedures, fire watches, and the use and placement of equipment at the ''project'' site must comply with the BC Fire Code requirements for Hot Work,
<li>a '''Fire Safety Plan''', whereby
<ol>
<li>the ''Contractor'' must assess the hazards to property and persons and produce a written Fire Safety Plan prior to the start of work, and
<li>the Fire Safety Plan must be kept on the ''project'' site and must be kept current until the ''project'' is completed,
</li></ol>
<li>'''RoofStar Guarantee Standards''', to which the ''Contractor'' must conform, at each juncture where the interface of different membranes applications constitutes part of the Fire Safety Plan,
<li>a '''Fire Watch''', in which the ''Contractor'' must, as part of the Fire Safety Plan, conduct a fire watch
<ol>
<li>that complies with the "British Columbia Fire Code",
<li>is assigned to competent, trained personnel using suitable equipment, including the use of a hand-held infrared thermometer, and
<li>is documented in a written fire watch log, and
</li></ol>
<li>'''Hot Works Notification''', wherein the ''Contractor'' shall notify the ''project'' authority or the AHJ, as and when required, that Hot Works will be performed.
</li></ol>
</li></ol>

====1.3.2.2. Workmanship====

(See [[Notes to GLW Standard#A-1.3.2.2. Workmanship | Note A-1.3.2.2.]])

<ol>
<li>The ''Contractor'' must take reasonable measures to protect the ''project'' from damage by the weather, during and at the completion of the ''project''.
<li>Open penetrations and flashings must be temporarily sealed off from the weather, even when other trades are responsible for making a permanent seal or installing overlapping materials (See [[#4.2.1.1. Use of Accepted Materials | Article 4.2.1.1.]]).
</li></ol>

====1.3.2.3. Contractor Qualifications====

<ol>
<li>Supervision and installation of a RoofStar-guaranteed ''waterproofing system'' may be conducted only by established employees of the ''Contractor'', and every ''project'' must be supervised by a Journeyperson employee who holds a valid ticket.
<li>A Journeyperson may supervise a maximum of three (3) apprentices and/or three (3) labourers (Ref. RCABC Policy A-248).
</li></ol>

====1.3.2.4. Contractor Submittals====

<ol>
<li>The ''Contractor'' shall submit to the '''''Guarantor''''', before a '''''RoofStar Guarantee''''' is issued, any and all required samples, reports, shop drawings, ELD arrangements, certificates, and ''manufacturer'' approvals.
</li></ol>

===1.3.3. Replacement and Alterations===
(The requirements in [[#1.3.2. All Systems | Subsection 1.3.2., "All Systems"]], shall be read together with the following Articles)

====1.3.3.1. General Requirements====

<ol>
<li>Unless expressly permitted otherwise in this Standard, all replacement waterproofing shall conform to the requirements for new waterproofing in this Standard.
</li></ol>

====1.3.3.2. Complete Grade-level Waterproofing System Replacement====

<ol>
<li>See the requirements throughout this Standard, which apply to both new construction and replacement of a waterproofing membrane.
</li></ol>

====1.3.3.3. Partial Grade-level Waterproofing System Replacement====

<ol>
<li>See the requirements throughout this Standard, which apply to both new construction and replacement of a waterproofing membrane.
</li></ol>

====1.3.3.4. Membrane Recovering====
(See [[#1.1.4.4. Membrane Recovering | Article 1.1.4.4.]])

<ol>
<li>Recovering shall not proceed unless permitted by a written Variance issued by the '''''Guarantor''''' prior to the tendering of the ''project''.
<li>All wet material identified by either the independent moisture detection survey or through cut tests shall be removed in the course of construction.
<li>When recovering any in-service ''project'' waterproofed with sheet membrane, the membrane must be
<ol>
<li>clean and free of debris, gravel, blisters, or damage, and
<li>cut through at the perimeter change in plane to relieve any tension or distortions in the membrane.
</li></ol>
<li>When recovering the membrane of a ''waterproofing system'', the means and methods shall conform to the requirements published in Article 1.3.3.4. of the roofing Standard for the permissible membrane.
<li>In-service built-up ''waterproofing systems'' (typically constructed with felt and asphalt) must be spudded clean of gravel, and any loose plies shall be removed.
<li>New membrane system materials must be properly secured to the underlying ''waterproofing assembly''.
<li>All membrane recovering projects must incorporate only new
<ol>
<li>strip-in flashings for penetrations (Ref. [[#Part 12 - Penetrations and Curbs |Part 12]]),
<li>''drains'' (cast-iron drains in usable condition are exempted from this requirement; see [[#11.3.3.2. General Requirements for Cast-iron Roof Drains | Article 11.3.3.2.]]), and
<li>''linear metal flashings'' (Ref. [[#Part 13 - Linear Metal Flashing |Part 13]]).
</li></ol>
</li></ol>

====1.3.3.5. Tie-ins, Additions, and Alterations to Existing Waterproofing====

<ol>
<li>Where a new ''waterproofing system'' adjoins and ties into an existing ''waterproofing system'', the two areas must be isolated and separated by a ''curb'' joint securely attached to the structure and waterproofed in keeping with the requirements for control joints ( [[#10.1.6.2. Control Joints (System Dividers) | Article 10.1.6.2.]] and [[#10.3.6.2. Control Joints (System Dividers) | Article 10.3.6.2.]]).
<li>If the ''Design Authority'' has obtained from the '''''Guarantor''''' a written Variance that permits the elimination of ''curb'' joints, the new ''waterproofing system'' must be fully isolated from the in-service ''waterproofing system'' with a positive water cut-off at the drainage plane:
<ol>
<li>the adjoining membranes must be compatible with each other and of the same membrane system type (e.g., Polymer-modified Bituminous Membranes),
<li>an authorized technical representative for the ''manufacturer'' of the new membrane must provide signed and dated written consent for this detail,
<li>the two areas must be isolated and separated from each other by a water cut-off as required below and illustrated in '''Figure 1.1.4.5.-A''':
<ol>
<li>a saw cut 12.7 mm (1/2”) wide and deep must be made in the new deck, at least 304.8 mm (12”) away from the adjacent ''waterproofing assembly'',
<li>the saw cut must be filled with a membrane-compatible mastic acceptable to the ''manufacturer'',
<li>new membranes should be installed in the same direction as the adjoining in-service membranes,
<li>the new base sheet must span the saw cut and extend past it by at least terminate no closer than 152.4 mm (6”) from the ''control joint'' securely attached to the structure and waterproofed in keeping with the requirements in both Article 10.1.6.2., "Control Joints (Roof Dividers)", and Part 10, "Perimeters and Walls" of the applicable membrane Standard for roofs, and
<li>the new ''waterproofing system'' must be easily distinguishable from the in-service system.
</li></ol>
</li></ol>
</li></ol>

====1.3.3.6. Repairs and Modifications====

<ol>
<li>When a ''waterproofing system'' that is covered by an active (unexpired) '''''RoofStar Guarantee''''' has been damaged or otherwise requires repairs, work shall conform to the specifications of the material manufacturers, and to the requirements in this Standard, with respect to (without limitation)
<ol>
<li>the securement of new materials ([[#Part 3 - Securing the Waterproofing Assembly | Part 3]]),
<li>deck or wall overlays ([[#Part 5 - Deck and Wall Overlays | Part 5]]),
<li>''continuity'' of air and vapour controls ([[#Part 6 - Air and Vapour Controls | Part 6]]),
<li>thermal resistance and insulation overlays ([[#Part 7 - Insulation | Part 7]] and [[#Part 8 - Insulation Overlays | Part 8]]),
<li>membranes ([[#Part 9 - Membrane System Field | Part 9]]),
<li>membrane flashing ([[#Part 10 - Perimeters and Walls | Part 10]]),
<li>drains ([[#Part 11 - Drainage | Part 11]]),
<li>penetrations and curbs ([[#Part 12 - Penetrations and Curbs | Part 12]]), and
<li>linear metal flashings ([[#Part 13 - Linear Metal Flashing | Part 13]]).
</li></ol>
<li>Modifications to an in-service ''waterproofing system'' covered by an active (unexpired) '''''RoofStar Guarantee''''', including (without limitation) the addition of new ''curbs'', ''drains'', or penetrations, shall conform to all the requirements in this Standard, or as otherwise stated.
</li></ol>

===1.3.4. Reserved===

<hr>
<div id=PART_2></div>

=Part 2 - Supporting Structures: Decks and Walls=
(See [[Notes to GLW Standard#A-2 | Note A-2]])

==Section 2.1. Design==
===2.1.1. General===
====2.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====2.1.1.2. Defined Terms====
(See '''Figure 2.1.1.2.-A''')

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Common Slope'' means a slope 1:3 (4” in 12”, or 18 degrees), up to and including 1:1 (12” in 12”, or 45 degrees).
<li>''Deck overlay'' means a panel material secured to the ''supporting deck'', to render the deck surface suitable for the installation of roofing materials.
<li>''Extreme Slope'' means a slope greater than 21:12 (21” in 12”, or 84 degrees).
<li>''Flat'' means a slope less than 1:6 (2” in 12”, or 9 degrees).
<li>''Low Slope'' means a roof with a slope 1:6 (2" in 12", or 9 degrees, up to but less than 1:3 (4” in 12”, or 18 degrees).
<li>''Sheathing'' means a rigid panel material secured directly onto framing.
<li>''Steep Slope'' means a slope greater than 1:1 (12” in 12”, or 45 degrees) up to and including 21:12 (21” in 12”, or 84 degrees).
<li>''Supporting deck'' ("deck"), as used in this Standard, means the "structural surface to which a ''waterproofing system'' is applied" (adapted from ''ASTM D1079-18 Standard Terminology Relating to Roofing and Waterproofing'').
<li>''Wall'' means a structural or non-structural element in a building that vertically separates space. ''Walls'' may separate the outside environment from the interior conditioned space of a building, or they may separate one or more interior spaces from each other (adapted from ASTM E631-15, "Standard Terminology of Building Constructions").
<li>''Wall overlay'' means a panel material secured to the surface of a ''wall'', to render it suitable for the installation of waterproofing or ''wall'' cladding materials.
</li></ol>
</li></ol>
 
:::{|
|-
| colspan="1"; style="text-align:center;width:500px;" | '''Figure 2.1.1.2.-A Roof Slope''' Forming Part of Article 2.1.1.2. (Click to expand illustration)
|-
| [[File:Figure 2.1.1.2.-A (Slopes).jpg|link=https://rpm.rcabc.org/images/4/4d/Figure_2.1.1.2.-A_%28Slopes%29.jpg| 600 px]]
|}

===2.1.2. Guarantee Term Requirements===
====2.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====2.1.2.2. Reserved====

===2.1.3. All Systems===
====2.1.3.1. General Requirements for Roof Slope====

<ol>
<li>The ''Design Authority'' must design the slope of a ''deck'' to achieve proper drainage and must take into consideration the anticipated deflection and settlement of the structure, which may interfere with drainage.
<li>While good drainage is desirable but not always perfectly achievable, and ''waterproofing systems'' generally are not affected by standing water, each ''project'' design should incorporate sufficient slope to move water off the ''waterproofing system'' surface.
<li>"Sufficient slope", which is subject to conditions that permit evaporation, shall mean that no standing water remains on the ''waterproofing system'' surface after a reasonable interval following a rainfall (See [[Notes to GLW Standard#A-2.1.3.1.(4) | Note A-2.1.3.1.(4)]]).
<li>''Deck'' slope should be increased beyond the minimums published in this Standard when local climate conditions, such as rainfall frequency or severity, result in ongoing or significant ponding conditions (see [[#2.1.3.2. Deck Slope for New Construction | Article 2.1.3.2.]] and [[#2.1.3.3. Slope for Replacement Roofing | Article 2.1.3.3.]] for minimum requirements).
<li>Drainage (slope toward plumbing ''drains'') should be achieved (in descending order of best practices) with
<ol>
<li>four-way slope to ''drain'',
<li>slope to a common valley, or to gutters, or
<li>positive sloping valleys to ''drains''.
</li></ol>
</li></ol>

====2.1.3.2. Deck Slope for New Construction====

<ol>
<li>All new construction waterproofing should be designed and built with a slope of no less than 2% (1/4” in 12”), measured on the primary sloped planes of the system, but positive slope off the ''deck'' or to drains is required.
<li>Where practicable, ''drains'' should be located mid-span on a ''deck'' between supporting columns or walls, especially when ''deck'' slopes are less than 1:50 (1/4” in 12”), to take advantage of ''deck'' deflections from future loads.
</li></ol>

====2.1.3.3. Slope for Replacement Waterproofing====

<ol>
<li>Replacement ''waterproofing systems'' may qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''' without correcting poor drainage, though the elimination of ponding (standing water) is strongly recommended.
</li></ol>

====2.1.3.4. Deck Condition and Suitability for Waterproofing====

<ol>
<li>The Code having jurisdiction prevails in all cases except where it is exceeded by the requirements published in this Standard.
<li>Notwithstanding the requirements in this Standard, the '''''RoofStar Guarantee''''' does not cover the ''supporting deck'' material or its attachment to the building structure, which is the responsibility of the ''Design Authority'' and the building contractor.
<li>The supporting ''deck'' must be dimensionally stable, resist deflection from dead and live loads, and must be capable of accommodating ''waterproofing system'' component movement.
<li>''Walls'', ''parapets'', ''curbs'', blocking, and penetrations should be constructed or placed by other trades prior to the commencement of waterproofing work.
</li></ol>

====2.1.3.5. Drainage Around Obstructions====

<ol>
<li>''Curbs'' that span 2438.4 mm (96") or more when measured perpendicular to roof slope, across the direction of drainage, should be designed with a cricket to divert water around the ''curb''.
</li></ol>

===2.1.4. Reserved===
===2.1.5. Structural Decks===
====2.1.5.1. Steel Roof Decks====
(See [[Notes to GLW Standard#A-2.1.5.1.| Note A-2.1.5.1.]]) (See also [[#Part 9 - Roof Field (Membrane Systems) | Part 9]] and [[#Part 10 - Perimeters and Walls | Part 10]] for substrate preparation requirements)

<ol>
<li>Although not as common as concrete, steel structural ''decks'' must be acceptable to the ''manufacturer'' and must conform to either
<ol>
<li>ASTM Standard Specification A653 / A653M, "Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process": Structural (Physical) Quality, minimum Grade 33, with a design thickness of 22-gauge (0.759 mm) or greater and a minimum zinc coating designation ''Z275'', or
<li>ASTM Standard Specification A792 / A792M, "Steel Sheet, Aluminum-Zinc Alloy-Coated by the Hot-Dip Process": General Requirements, minimum Grade 33, with a design thickness of 22-gauge (0.759 mm) or greater and a minimum aluminum-zinc alloy coating designation ''AZ150''.
</li></ol>
<li>Steel ''deck'' panels must be properly aligned, squarely intersect walls, and provide a smooth level surface for waterproofing.
<li>Steel ''decks'' that receive poured concrete overlays shall have vented pans to prevent entrapment of moisture; this work is by other trades.
</li></ol>

====2.1.5.2. Concrete Decks====
(See [[Notes to GLW Standard#A-2.1.5.2.| Note A-2.1.5.2.]])

<ol>
<li>Cast-in-place and precast concrete ''decks'' must cure for at least 28 days before receiving an adhered waterproofing membrane ("adhered", as it is used in this requirement, means fully or intermittently bonding any membrane to the ''deck'' with an adhesive, hot asphalt (bitumen), or heat), but this limitation may be reduced if
<ol>
<li>both the building envelope engineer and the ''manufacturer'' expressly permit membrane application within the first 28 days after pouring, and
<li>their respective signed letters of permission are furnished to the '''''Guarantor''''' forthwith, to be included with the ''project'' record.
</li></ol>
<li>Shotcrete-formed concrete decks are not an acceptable substrate for the application of sheet membranes.
</li></ol>

====2.1.5.3. Wood Decks====

<ol>
<li>Wood decks are not acceptable substrates for ''waterproofing systems'' covered under the '''''RoofStar Guarantee Program'''''.
</li></ol>

===2.1.6. Reserved===

===2.1.7. Walls===
(See [[Notes to GLW Standard#A-2.1.7.| Note A-2.1.7.]])

====2.1.7.1. General====
<ol>
<li>''Wall'' surfaces must be clean, dry, and smooth, suitable for the application of ''waterproofing system'' materials.
<li>''Wall'' framing must be sheathed with a material suitable for adhering waterproofing membranes and securing metal flashings; when sheathing is unsuitable, it must be overlaid with an accepted wall overlay.
<li>''Sheathing'' is considered a wall surface for the purpose of this Standard.
<li>''Wall'' surfaces suitable for receiving ''waterproofing'' materials must extend beyond the maximum installed height of the ''waterproofing'', but in any event must be installed at least 203.2 mm (8”) above the ''finished system surface'' (For ''wall'' overlays, refer to [[#5.2.1.3. Overlays for Walls | Article 5.2.1.3.]]).
<li>Indirect connections between ''walls'' and the structural ''deck'' require a ''control joint'' (See [[Notes to GLW Standard#A-10.1.6.2. | Note A-10.1.6.2.]]).
</li></ol>

===2.1.8. Reserved===

==Section 2.2. Materials==
===2.2.1. Material Properties===
====2.2.1.1. Sheathing for Framed Walls====

<ol>
<li>Framed wall sheathing must be
<ol>
<li>moisture resistant fibreglass-faced silicon treated gypsum core board, with a minimum thickness of 12.7 mm (1/2”) (These panels are specifically designed to receive waterproofing membranes and may be installed horizontally or vertically).
<li>fibre-reinforced cementitious panels with a minimum thickness of 9.53 mm (3/8"), or
<li>plywood, having a minimum thickness of 12.7 mm (1/2”).
</li></ol>
<li>Where ''wall'' sheathing is unsuitable to receive waterproofing materials, refer to [[#Part 5 - Deck and Wall Overlays | Part 5, "Deck and Wall Overlays"]].
</li></ol>

==Section 2.3. Application==
===2.3.1. Guarantee Term Requirements===
====2.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

===2.3.2. All Systems ===
====2.3.2.1. Construction of Decks and Walls====

<ol>
<li>Unless otherwise permitted and described in this Standard, the construction of ''deck'' and ''wall'' structures, and their suitability for the application of waterproofing materials, is the responsibility of other trades.
</li></ol>

<hr>
<div id=PART_3></div>

=Part 3 - Securing the Waterproofing Assembly=

==Section 3.1. Design==
===3.1.1. General===
====3.1.1.1. Scope====
(See [[Notes to GLW Standard#A-3.1.1.1.| Note A-3.1.1.1.]])

<ol>
<li>For waterproofing assemblies that are exposed to wind, refer to the design, material, and application requirements for wind resistance, published in Part 3 of the published RGC Standard for the specific membrane, for uninsulated or insulated (protected) systems:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#Part_3_-_Securing_the_Roof_Assembly Part 3] in the RGC Standard for SBS-modified Bituminous Membrane Roofs.
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#Part_3_-_Securing_the_Roof_Assembly Part 3] in the RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs.
</li></ol>
</li></ol>

<hr>
<div id=PART_4></div>

=Part 4 - Materials=
==Section 4.1. Design==
===4.1.1. General===
====4.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====4.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Primary Material'', as used in this Standard, means a material used in a ''waterproofing system'' that is manufactured for exposure to the weather.
<li>''Secondary Material'', as used in this Standard, means a material that is used in a ''waterproofing system'' that is not usually exposed to the weather.
</li></ol>
</li></ol>

==Section 4.2. Materials==
===4.2.1. Material Properties===
====4.2.1.1. Use of Accepted Materials====
(For limitations and exclusions pertaining to materials, see [[Guarantee#3.2.1.2. Limitations and Exclusions of Guarantee | Division A, Article 3.2.1.2.]])

<ol>
<li>All materials installed by the ''Contractor'', for new construction or alterations, must be
<ol>
<li>newly manufactured (except for reusable insulation; see [[#7.1.3.2. General Requirements | Article 7.1.3.2.]]), and may not be recycled without the expressed, written consent of the '''''Guarantor''''',
<li>accepted by the '''''RoofStar Guarantee Program''''', and
<li>manufactured by, or listed as acceptable to, the manufacturer of the ''primary material''.
</li></ol>
<li>All uninstalled materials must be
<ol>
<li>protected from weather with wrappers approved or recommended by the ''manufacturer'',
<li>properly stacked, and
<li>secured above ground or on the ''project'' surface.
</li></ol>
<li>All installed roofing materials that are susceptible to moisture damage must be made watertight by the end of each workday.
<li>Metals and fasteners must be compatible with each other, to avoid galvanic corrosion which can occur when dissimilar metals contact each other.
</li></ol>

==Section 4.3. Application==
===4.3.1. Guarantee Term Requirements===
====4.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====4.3.1.2. Reserved====

===4.3.2. All Systems===
====4.3.2.1. Application of New Materials====

<ol>
<li>All new materials installed as part of the ''waterproofing system'' shall conform to the ''manufacturer's'' published requirements, unless superseded by this Standard.
</li></ol>

<hr>
<div id=PART_5></div>

=Part 5 - Deck and Wall Overlays=
(See [[Notes to GLW Standard#A-5| Note A-5]])

==Section 5.1. Design==
===5.1.1. General===
====5.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====5.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===5.1.2. Guarantee Term Requirements===
====5.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====5.1.2.2. Reserved====

===5.1.3. All Systems===
====5.1.3.1. Required Use of Overlays====
(See [[Notes to GLW Standard#A-5.1.3.1.| Note A-5.1.3.1.]]; see also [[#Part 9 - Membrane System field) | Part 9]] and [[#Part 10 - Perimeters and Walls | Part 10]] for substrate preparation requirements)

<ol>
<li>Two layers of fibre-reinforced cement board deck overlay conforming to the requirements in [[#5.2.1.1. Suitability of Overlays | Article 5.2.1.1.]] must be specified when the ''deck'' is steel.
<li>When wall sheathing is not suitable to receive waterproofing, at least one layer of an acceptable wall overlay conforming to [[#5.2.1.3. Overlays for Walls | Article 5.2.1.3.]] shall be specified for ''walls'' (other than concrete) that will receive waterproofing materials.
</li></ol>

==Section 5.2. Materials==
(See [[Division_C | Division C]])

===5.2.1. Material Properties===
====5.2.1.1. Suitability of Overlays====

<ol>
<li>''Deck'' and ''wall'' overlays must be
<ol>
<li>listed in [[Division_C | Division C]],
<li>acceptable to the ''manufacturer'',
<li>suitable for the type of ''deck'', and
<li>suitable for, and compatible with, any membrane or panel application.
</li></ol>
</li></ol>

====5.2.1.2. Overlays for Decks====

<ol>
<li>Only fibre-reinforced cementitious panels (boards) may be used on steel ''decks'' and shall be
<ol>
<li>manufactured in conformance with ASTM C1325 (latest edition), “Standard Specification for Fiber-Mat Reinforced Cementitious Backer Units”,
<li>at least 12.7 mm (1/2”) thick,
<li>acceptable to the ''manufacturer'',
<li>suitable for the type of ''deck'', and
<li>suitable for, and compatible with, any membrane or panel application.
</li></ol>
</li></ol>

====5.2.1.3. Overlays for Walls====

<ol>
<li>In addition to overlays listed in [[Division_C | Division C]], ''walls'' may be overlaid with
<ol>
<li>plywood, provided the plywood is least 12.7 mm (1/2”) thick and is pressure-treated when applied over concrete or concrete masonry units (CMU),
<li>Type A fibre-reinforced cementitious panels (boards) manufactured in conformance with ASTM C1325 (latest edition), “Standard Specification for Fiber-Mat Reinforced Cementitious Backer Units”, or
<li>inorganic moisture-resistant panels listed in [[Division_C | Division C]].
</li></ol>
</li></ol>

====5.2.1.4. Fasteners====

<ol>
<li>Refer to Article 3.2.2.1. of the related ''waterproofing roof'' Standard.
</li></ol>

==Section 5.3. Application==
(This Section shall be read in conjunction with the requirements for substrate preparation in [[#Part 9 - Roof Field (Membrane Systems) | Part 9]] and [[#Part 10 - Perimeters and Walls | Part 10]])

===5.3.1. Guarantee Term Requirements===
====5.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====5.3.1.2. Reserved====

===5.3.2. All Systems===
====5.3.2.1. Overlays on Concrete Decks====

<ol>
<li>A ''deck'' overlay board is not mandatory on a concrete ''deck'', but when it is specified, it must be installed to conform to the requirements in this Part.
</li></ol>

====5.3.2.2. Overlays on Steel Decks====

<ol>
<li>Steel decks must provide a smooth, even surface for waterproofing and therefore must be topped with concrete or overlaid with no fewer than two layers of fibre-mat reinforced cement boards.
<li>''Deck'' overlays must be
<ol>
<li>fully or intermittently supported along all edges by the ''deck'', and
<li>installed in a staggered pattern (offset) 304.8 mm (12") from adjacent board rows (a minus offset tolerance of 50.8 mm (2") maximum will be permitted to compensate for variance in the manufacturer's tolerance of differing board widths and lengths).
</li></ol>
<li>The base layer of ''deck'' overlays shall be affixed to the ''deck'' with mechanical fasteners or adhesives acceptable to the ''manufacturer'' specified by the ''Design Authority'' and conforming to the requirements in Article 3.2.2.1. or 3.2.2.2. of the related ''waterproofing roof'' Standard.
<li>When spacing requirements for fasteners are not provided by the ''Design Authority'', installation shall comply with the requirements in '''Table 5.3.2.2.-A'''.
<li>Only adhesives acceptable to the ''manufacturer'' shall be used to secure the second layer of ''deck'' overlays; mechanical fixation through both layers is not permitted.
<li>When the waterproofing membrane is liquid-applied (including hot-applied rubberized asphalt), all board joints that will receive liquid applied membrane systems must be taped with the waterproofing ''manufacturer's'' approved joint tape.
</li></ol>
 
::::{|
|-
|-
| colspan="4"; style="text-align:center;width:450px;" | '''Table 5.3.2.2.-A Minimum Fastener Requirements for Deck Overlay Fastening''' Forming Part of Article 5.3.2.2.
|-
|}
{| class="wikitable" style="margin-left: 20pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:center;"
|-
! Thickness !! Deck Flute Width !! Board Size !! Screws & Metal Stress Plates
|-
| 9.5 mm (3/8”) || up to 125 mm (5") || 1200 mm x 2400 mm (48" x 96") || 12
|-
| 12.7 mm (1/2") || up to 125 mm (5") || 1200 mm x 2400 mm (48" x 96") || 12
|-
| 15.9 mm (5/8") || up to 200mm (8") || 1200 mm x 2400 mm (48" x 96") || 12
|-
|}

====5.3.2.3. Overlays on Steel Decks with Concrete Topping====

<ol>
<li>A ''deck'' overlay is not required for steel ''decks'' topped with concrete..
</li></ol>

====5.3.2.4. Reserved====

====5.3.2.5. Support, Arrangement, and Securement of Wall Overlays====

<ol>
<li>All concrete or masonry ''parapets'' and ''walls'' must provide a smooth, clean, dry surface for membrane adhesion.
<li>When ''walls'' do not provide a smooth, clean, dry surface for membrane adhesion may be overlaid with a minimum 15.9 mm (5/8") treated plywood or 9.5 mm (3/8") reinforced cement board that conforms to Type A fibre-reinforced cementitious panels (boards) manufactured in conformance with ASTM C1325 (latest edition), “Standard Specification for Fiber-Mat Reinforced Cementitious Backer Units”.
<li>''Wall'' overlays must be mechanically attached or adhered to the wall with polyurethane an adhesive acceptable to the ''manufacturer''.
<li>When waterproofing is applied directly to masonry ''parapets'' or ''walls'', follow the applicable RGC roof Standard from [[Division B | Division B]].
<li>A ''parapet wall'' is required at adjoining walls where the ''deck'' is not supported by the ''wall'' (expansion joint) and shall be sheathed with minimum 15.9 mm (5/8") plywood or 9.5 mm (3/8") reinforced cement board that conforms to ASTM C1325-04.
<li>Wall sheathing shall be fastened to preservative treated blocking or to steel stud framing that is attached solidly to the ''deck'' and not the ''wall''.
<li>Compressible insulation is to be installed between the sheathing and the ''wall'' and an accepted expansion joint membrane as well as metal counter flashing shall be installed.
</li></ol>

<hr>
<div id=PART_6></div>

=Part 6 - Air and Vapour Controls=
(See [[Notes to GLW Standard#A-6 | Note A-6]])

==Section 6.1. Design==
===6.1.1 General===
====6.1.1.1. Scope====
(See [[Notes to GLW Standard#A-6.1.1.1. | Note A-6.1.1.1.]])

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====6.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Air barrier'' means a material that is manufactured and tested to prohibit the passage of air through that material.
<li>''Continuity'' means a sealed, resistive, continuous connection
<ol>
<li>between ''control layers'' that have the same function, and
<li>between a ''control layer'' and another material or object it joins to (i.e., a roof drain or penetration).
</li></ol>
<li>''Control layer'' means a material used in a ''waterproofing assembly'' or ''wall assembly'', that is manufactured and tested to resist or control the movement of air, vapour, or liquid water into or through that assembly.
<li>''Vapour retarder'' means a material that is manufactured and tested to prohibit or regulate the passage of water vapour through that material.
<li>''Water resistive barrier'' (WRB) means a material that is manufactured and tested to resist the transmission of liquid water through the material and is usually used in wall assemblies.
</li></ol>
</li></ol>

===6.1.2. Guarantee Term Requirements===
====6.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====6.1.2.2. Reserved====

===6.1.3. All Systems===
====6.1.3.1. Responsibility for Design====

<ol>
<li>The ''Design Authority'' is responsible for specifying
<ol>
<li>air and vapour control materials,
<li>the placement of continuous air and vapour ''control layers'' in relation to a ''waterproofing system'' and its components, and
<li>the selection of suitable materials for that application (See [[Notes to Hot Rubber Standard#A-6.1.3.1. | Note A-6.1.3.1.]]).
</li></ol>
<li>The ''Design Authority'' is urged to review and consider the performance characteristics of materials available for such applications.
<li>Coverage under the '''''RoofStar Guarantee''''' shall be as described in [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]].
<li>Notwithstanding coverage provisions in Division A, neither the '''''RoofStar Guarantee Program''''' nor the ''Contractor'' will accept any responsibility for damage to, or failure of, the ''waterproofing system'' caused by the use or absence of air or vapour ''control layers''.
</li></ol>

====6.1.3.2. Continuity of Control Layers====

<ol>
<li>The ''Design Authority'', and trades constructing walls and waterproofing assemblies, are jointly responsible for making proper connections (continuity) between air and vapour control ''systems'', including the transitions between assemblies built by different trades (See [[#6.1.3.1. Responsibility for Design | Article 6.1.3.1.]] and [[#6.3.2.1. Continuity and Support | Article 6.3.2.1.]]).
<li>Where air, vapour, or water ''control layers'' intersect a ''roof drain'', ''overflow drain'', ''scupper drain'', or penetration, the intersection must be designed for ''continuity'', and drawings must detail the execution of ''continuity'' for the ''Contractor''.
<li>''Overflow drains'' and ''scupper drains'' that penetrate ''wall assemblies'' must be designed and drawn to prevent air intrusion from the outside environment (See Article 3.1.5.1. in the related ''waterproofing roof'' Standard).
</li></ol>

====6.1.3.3. Use of Air Control Materials====

<ol>
<li>The ''Design Authority'' is responsible for the selection of air control materials (some air ''control layers'' are considered vapour permeable, others vapour-impermeable); ''waterproofing systems'' intended to qualify for a '''''RoofStar Guarantee''''' should be designed according to the regulatory design and installation requirements for effective, continuous air control ''systems''.
<li>All materials selected by the ''Design Authority'' should conform to the material and performance characteristics required in the "British Columbia Building Code", Division B,[https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp5s54 Article 5.4.1.2., "Air Barrier System Properties"].
</li></ol>

====6.1.3.4. Use of Vapour Control Materials====

<ol>
<li>Because continuous vapour ''control layers'' may be needed to limit “water vapour transmission and condensation, burn protection, and severe climatic conditions” (National Energy Code of Canada for Buildings 2020, [https://nrc-publications.canada.ca/eng/view/ft/?id=af36747e-3eee-4024-a1b4-73833555c7fa Article 5.2.5.3.(1), "Other Considerations"]; see also the "British Columbia Building Code", Division B, [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbp5s55 Article 5.5.1.1., "Required Resistance to Vapour Diffusion"]), they are considered discretionary and must be specified by the ''Design Authority''.
<li>Where continuous vapour ''control layers'' are required and specified by Code, the '''''RoofStar Guarantee Program''''' requires that a suitable vapour control ''system'' be selected by the ''Design Authority'' and properly installed by the ''Contractor'' in conformity with the vapour ''control layer'' manufacturer’s published instructions, and with the ''Design Authority’s'' specified details.
</li></ol>

====6.1.3.5. Reserved====

====6.1.3.6. Reserved====

==Section 6.2. Materials==
===6.2.1. Material Properties===
====6.2.1.1. Compatibility with Other Materials====

<ol>
<li>The material selected for air and vapour ''control layers'' must be compatible with any other materials in the ''waterproofing system'' or ''wall'' ''assembly'' to which the ''control layer'' may come in contact, including (without limitation) contact with primers and adhesives, substrates, solvents, and cleaners.
</li></ol>

====6.2.1.2. Permitted Materials for RoofStar Guarantee====
(See [[Notes to GLW Standard#A-6.2.1.2. | Note A-6.2.1.2.]])

<ol>
<li>While responsibility for the selection of suitable air and vapour ''control layers'' rests with the ''Design Authority'', a ''waterproofing system'' designed and built to qualify for a '''''RoofStar Guarantee''''' must satisfy the requirements in [[#6.2.1.3. Puncture Resistance and Thickness | Article 6.2.1.3.]]
</li></ol>

====6.2.1.3. Puncture Resistance and Thickness====

<ol>
<li>Air and vapour controls should be installed over a continuous smooth plane, regardless of a material's ability to span voids or spaces in the deck.
<li>Fully supported air and vapour ''control layers'' should possess a minimum published static puncture resistance rating of 150 N (34 lbf) (Ref. CGSB-37.56-M for both test method and standard limits) and be either self-adhering or torch-applied; a high puncture resistance is necessary for the membrane to withstand accidental damage during construction.
<li>Where no ''deck'' overlay board is installed and the air and vapour ''control layers'' are partially unsupported (for example, on a steel ''deck''), the ''control layers'' must possess a published static puncture resistance of at least 400 N (90 lbf).
<li>Should the air or vapour ''control layers'' be used as a temporary roof during ''project'' construction by either the ''Contractor'' or by other trades, a minimum 2 mm thick bituminous membrane is recommended.
</li></ol>

====6.2.1.4. Self-adhered and Torch-applied Materials====

<ol>
<li>Self-adhering or adhesive-applied materials should be considered as alternatives to torch-applied membranes when the substrate to which they will be applied is combustible, or when nearby structures, openings or materials present a fire hazard.
<li>A suitable separation or overlay material may be used as protection from open flame is acceptable; the application of materials to a combustible surface, using a torch, is strictly prohibited.
</li></ol>

====6.2.1.5. Reserved====

==Section 6.3. Application==
===6.3.1. Guarantee Term Requirements===
====6.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====6.3.1.2. Reserved====

===6.3.2. All Systems===
====6.3.2.1. Continuity and Support====

<ol>
<li>The ''Contractor'' must
<ol>
<li>ensure that air and vapour ''control layers'' that form part of ''wall'' assemblies and tie into the ''waterproofing assembly'' are installed to provide at least 101.6 mm (4”) of overlap, for ''continuity'' of matching layers in adjacent assemblies,
<li>ensure that air and vapour ''control layers'' are sealed to penetrations and drains that pass through or enter the ''waterproofing assembly'', and
<li>seal all ''control layers'' to matching layers in adjacent assemblies (i.e., ''walls'').
</li></ol>
<li>Installation of all air and vapour control materials must be smooth and uniform, without wrinkles or fish-mouths, and must also conform to the manufacturer’s published requirements and the ''Design Authority’s'' design details.
<li>All air and vapour control membrane side and end laps must be fully supported, in the field and at transitions with curbs, ''parapets'', ''walls'', and penetrations.
<li>''Drains'', ''overflow drains'', ''scupper drains'', and penetrations must be detailed where they intersect an air, vapour, or water ''control layer'', to provide ''continuity''.
</ol></li>

====6.3.2.2. Torch-applied Materials====

<ol>
<li>The application of materials to unprotected combustible materials, using a torch, is strictly prohibited.
<li>All combustible materials MUST be protected from open flame by an acceptable separation or overlay material; this includes, without limitation, combustible materials
<ol>
<li>on ''decks'', ''walls'', blocking, and canted edges, and
<li>that are hidden or obscured within voids, cracks, or orifices.
</li></ol>
<li>When a torch-applied membrane is specified over or adjacent to combustible materials, all joints between overlay panels, and at ''waterproofing system''-''wall'' transitions, must be sealed with the primary membrane ''manufacturer’s'' approved self-adhered membrane or tapes.
<li>Where torch-applied membranes are not permitted or desirable, the installation of bituminous air and vapour ''control layers'' should align with the approaches described and required in the "Standard for SBS-modified Bitumen Membrane Roof Systems", [[SBS_Roof_Systems_Standard#10.3.8. Alternative Approaches to Sheet Membrane Flashing | Subsection 10.3.8., "Alternative Approaches to Sheet Membrane Flashing"]].
</li></ol>

====6.3.2.3. Securement on Slopes====

<ol>
<li>Self-adhered membranes applied to slopes greater than 1:6 (2” in 12”) should be additionally secured with mechanical fasteners in locations where slippage may occur, to counter-act material displacement resulting from temperatures that exceed the membrane’s service temperature.
</li></ol>

====6.3.2.4. Reserved====

<hr>

<div id=PART_7></div>

=Part 7 - Insulation=
==Section 7.1. Design==
===7.1.1. General===
====7.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====7.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Heat-resistant insulation'' means insulation that resists heat and will not physically or chemically change when exposed to heat greater than 70°C (158°F), including heat from liquefied bitumen. Insulation boards of this type include fibreboard, polyisocyanurate, and mineral fibre ("wool"). Note that "heat-resistant" does not mean or even infer 'fire-proof'. While some heat-resistant insulation materials will resist burning for a time, only mineral fibre insulation will not burn.
<li>''Heat-sensitive insulation'' means insulation that may be physically or chemically altered when exposed to heat greater than 70°C (158°F) — for example, heat from a torch or from liquefied bitumen. Heat-sensitive insulation includes EPS, XPS and polyurethane.
</li></ol>
</li></ol>

===7.1.2. Guarantee Term Requirements===
====7.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====7.1.2.2. Reserved====

====7.1.2.3. Reserved====

===7.1.3. All Systems===
====7.1.3.1. Responsibility for Design====
(See [[Notes to GLW Standard#A-7.1.3.1.| Note A-7.1.3.1.]])

<ol>
<li>The ''Design Authority'' is responsible to ensure the design conforms to the Building Code and any other applicable requirements.
</li></ol>

====7.1.3.2. General Requirements====

<ol>
<li>Selected board insulation products may be used within the membrane ''waterproofing systems'', provided the panels are listed in [[Division_C | Division C]], and conform to the material specifications in [[#Section 7.2. Materials | Section 7.2.]]
</li></ol>

====7.1.3.3. Use of Existing Insulation====

<ol>
<li>Existing insulation in a ''waterproofing system'' may be reused (it will be excluded from coverage under the '''''Guarantee''''', which applies only to new materials), provided
<ol>
<li>the insulation is dry (most XPS insulation absorbs water vapour while in service),
<li>the ''Design Authority'' has specified its reuse, and
<li>the condition of the insulation is acceptable to the ''Design Authority'' as suitable to satisfy the requirements of the Building Code.
</li></ol>
</li></ol>

====7.1.3.4. Thermal Resistance and Layering====
(See [[Notes to GLW Standard#A-7.1.3.4.| Note A-7.1.3.4.]])

<ol>
<li>All insulated ''waterproofing systems'' with a cumulative thermal resistance greater than RSI-2.64 (R-15) (based on published LTTR values measured at 24°C) must be installed in multiple layers that are offset and staggered (See [[#Section 7.3. Application | Section 7.3., "Application"]]).
<li>In a multi-layered ''assembly'', any single layer of insulation in the field may have a thermal resistance greater than RSI-2.64 (R-15) provided no one layer exceeds 60% of the cumulative thermal resistance of the combined ''assembly'' of insulation, measured together with the thermal resistance of insulation overlay boards (See '''Figure 7.1.3.4.-A''').
<li>At intersections with insulated curbs and walls, insulation joints at the ''waterproofing system''-wall interface must be offset and staggered to minimize or eliminate thermal bridging (See '''Figure 7.3.2.2.-A)'''.
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 7.1.3.4.-A Effective Thermal Resistance and Layering''' Forming Part of Sentence 7.1.3.4.(2) (Click to expand illustration)
|-
| [[File:Figure 7.1.3.-A (XPS).jpg|link=https://rpm.rcabc.org/images/a/ae/Figure_7.1.3.-A_%28XPS%29.jpg | 600 px]]
|}

===7.1.4. Reserved===

===7.1.5. Reserved===

===7.1.6. Protected Waterproofing Systems===
(The requirements in [[#7.1.3. All Systems | Subsection 7.1.3., "All Systems"]], shall be read together with the following articles)

====7.1.6.1. Insulation Selection====

<ol>
<li>Only extruded polystyrene insulation (XPS) may be specified for a ''waterproofing system''.
</li></ol>

====7.1.6.2. Drainage Mats and Filter Fabric====

<ol>
<li>At least one drainage layer is required in a ''protected waterproofing system'', either above or below the XPS insulation, but
<ol>
<li>when openings for penetrations in ''walls'' or the ''deck'' provide less than 203.2 mm (8”) of clearance, the filtration layer must be water-permeable and the drainage layer shall be below the XPS insulation, to lower the ''drainage plane'' and minimize leaks into the building, and
<li>a drainage layer shall be specified above the XPS insulation when any ''overburden'' superimposed on the ''waterproofing system'' will result in a “vapour-closed” condition (i.e., landscaping, or an impermeable wearing course).
</li></ol>
<li>Filter fabric must be specified to cover XPS insulation, to
<ol>
<li>contain the insulation and thereby prevent ‘insulation stacking’ (displacement) when insulation boards become buoyant in water, and
<li>prevent fines from settling at the membrane level and filling the voids between insulation board joints.
</li></ol>
</li></ol>

==Section 7.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===7.2.1. Material Properties===
====7.2.1.1. General====

<ol>
<li>Only insulation boards accepted for use in the '''''RoofStar Guarantee Program''''', and acceptable to the membrane manufacturer, may be used to qualify for a '''''RoofStar Guarantee'''''.
</li></ol>

====7.2.1.2. Material Dimensions====

<ol>
<li>While minimal insulation panel thicknesses are permissible for some designs, some materials are by their nature breakable, and therefore the ''Design Authority'' should consider the constructability of the ''waterproofing system'' from a material handling perspective and consider specifying a thicker panel.
</li></ol>
</li></ol>

====7.2.1.3. Drainage Mats====

<ol>
<li>Drainage mats shall conform to the requirements in [[#14.2.1.4. Drainage and Water Retention Materials | Article 14.2.1.4.]]
</li></ol>

====7.2.1.4. Filter Fabric====

<ol>
<li>Filter fabrics shall conform to the requirements in [[#14.2.1.6. Filter Fabric | Article 14.2.1.6.]]
</li></ol>

===7.2.2. Suitability of Insulation===
====7.2.2.1. Extruded Polystyrene Insulation====

<ol>
<li>Extruded polystyrene insulation ("XPS") is ''heat-sensitive'' and
<ol>
<li>shall conform to CAN/CGSB-51.20-M87, "Thermal Insulation, Polystyrene, Boards and Pipe Covering", for Type 4 insulation, and to ASTM C578, "Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation", and
<li>is the only insulation that may be specified and installed in a ''waterproofing system''.
</li></ol>
</li></ol>

==Section 7.3. Application==
===7.3.1. Guarantee Term Requirements===
====7.3.1.1. RoofStar 5-year and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====7.3.1.2. Reserved====

===7.3.2. All Systems===
====7.3.2.1. Procurement of Insulation====

<ol>
<li>All insulation, except insulation that may be specified for re-use (See [[#7.1.3.2. General Requirements | Article 7.1.3.2.]]), must be supplied and installed by the ''Contractor''.
</li></ol>

====7.3.2.2. Alignment, Sizing, and Support====

<ol>
<li>Insulation boards
<ol>
<li>must be clean and dry,
<li>must be firmly supported,
<li>should be square and should make firm, full contact with adjacent panels,
<li>must be installed with the appropriate grade of expanding spray foam applied to gaps greater than 6.35 mm (1/4”) (this requirement does not apply to extruded polystyrene (XPS) installed in a ''protected waterproofing system''), and
<li>shall not be soldiered and must be laterally offset at least 304.8 mm (12") in two directions, both for adjacent layers and for adjacent row; a minus offset tolerance of 50.8 mm (2") maximum is permissible (See '''Figure 7.3.2.2.-A''').
</li></ol>
<li>Offsets are not required for
<ol>
<li>sloped insulation boards that are generally installed soldiered fashion to adjacent rows, and
<li>the first layer of overlay board, installed on top of heat-sensitive insulation, which may be soldiered to facilitate joint taping.
</li></ol>
 
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 7.3.2.2.-A Offset and Staggered Layering in Field''' Forming Part of Clause 7.3.2.2.(1)(4) (Click to expand illustration)
|-
| [[File:Figure 7.3.2.-A (XPS).jpg|link=https://rpm.rcabc.org/images/1/15/Figure_7.3.2.-A_%28XPS%29.jpg | 500 px]]
|}
 
<li>On exterior insulated walls, insulation joints at the waterproofing system-wall interface must be offset and staggered to eliminate thermal bridging (See '''Figure 7.3.2.2.-B''').
 
 
{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 7.3.2.2.-B Offset and Staggered Layering at Wall''' Forming Part of Clause 7.3.2.2.(3) (Click to expand illustration)
|-
| [[File:Figure 7.3.2.2.-B (Hot Rubber).png|link=https://rpm.rcabc.org/images/3/30/Figure_7.3.2.2.-B_%28Hot_Rubber%29.png| 500 px]]
|}
</li></ol>

====7.3.2.3. Insulation Securement====

<ol>
<li>Insulation securement shall conform to the specified design for the ''waterproofing assembly'', calculated to resist flotation and (when applicable) ''specified wind loads''.
</li></ol>

====7.3.2.4. Reserved====

===7.3.3. Reserved===

===7.3.4. Reserved===
===7.3.5. Protected Waterproofing Systems===
(The requirements in [[#7.3.2. All Systems | Subsection 7.3.2., "All Systems"]], shall be read together with the following articles)

====7.3.5.1. Sequencing of Work====

<ol>
<li>Insulation installed against ''walls'' or ''curbs'' must be separated from waterproofing membranes with a non-bonding drainage mat or slip sheet.
<li>Insulation must be secured and protected immediately after installation.
</li></ol>

====7.3.5.2. Drainage Mats====
(See also [[#Part 11 - Drainage | Part 11, "Drainage"]])

<ol>
<li>At least one drainage layer is required in a ''waterproofing system'' and its location within the system shall conform to the design requirements in [[#7.1.6.2. Drainage Mats and Filter Fabric| Sentence 7.1.6.2.(1)]].
<li>A drainage mat must be installed below the XPS insulation.
<li>A second drainage layer may be installed above the insulation but is at the discretion of the ''Design Authority''.
<li>If a second drainage layer is specified, a vertical separation space measuring at least 12.7 mm (1/2″) must be preserved between the drainage layer and any ballast or overburden, to permit airflow and to assist in leveling.
<li>Specialized proprietary drainage products must be acceptable to the membrane ''manufacturer''.
<li>Ballast guards must be installed around all roof drains.
</li></ol>

====7.3.5.3. Filter Fabric====

<ol>
<li>Fabric filter mats must be
<ol>
<li>installed loose-laid (un-bonded) over the insulation and below any type of ballast or ''waterproofing system'' covering,
<li>overlapped at all edges a minimum of 304.8 mm (12”),
<li>at least 2438.4 mm x 2438.4 mm (96" x 96") in size, and
<li>slit to fit over roof penetrations or cut out around ''drains'' and other openings.
</li></ol>
<li>Filter fabric must extend up perimeter edges and ''curbs'' and must be placed loose (unattached) under metal counter flashings or wall finishes.
<li>When the filtration layer is part of a ''vegetated roof assembly'', the filtration layer shall conform to [https://rpm.rcabc.org/index.php?title=VRA_Standard#10.3.2.7._Installation_of_Void_Fill_and_Filtration_Layers Article 10.3.2.7.] of the “RGC Standard for Vegetated Roofs”.
</li></ol>

<hr>
<div id=PART_8></div>

=Part 8 - Reserved=

<hr>
<div id=PART_9></div>

=Part 9 - Membrane System Field=
==Section 9.1. Design==
===9.1.1. General===
====9.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====9.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Manufacturer'' means the manufacturer of the primary waterproofing material, unless stated otherwise.
<li>''Parallel to Slope'' means the direction parallel to the angle of a sloped plane.
</li></ol>
</li></ol>

===9.1.2. Guarantee Term Requirements===
====9.1.2.1. RoofStar 5-year Guarantee Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in Part 9 of the relevant RGC Standard for Waterproofing Roofs (See [[#9.1.3.1. General Requirements | Article 9.1.3.1.]] in this Standard)..
</li></ol>

====9.1.2.2. Reserved====

====9.1.2.3. Reserved====

===9.1.3. All Systems===
====9.1.3.1. General Requirements====

<ol>
<li>Only waterproofing membrane systems that are fully adhered and have an accepted protection layer installed above the membrane (protected) qualifies for coverage under the '''''RoofStar Guarantee Program'''''.
<li>All ''waterproofing system'' accessory components must be supplied or be accepted for use by the membrane ''manufacturer''.
<li>All materials must be protected from weather by properly stacking above ground or Deck surfaces and keep in factory packaging or other adequate covering until applied
</li></ol>

====9.1.3.2. Requirements for SBS-modified Bituminous Membrane Systems====

<ol>
<li>The field application of SBS-modified bituminous membrane ''waterproofing systems'' on structural ''decks'' at grade shall conform to the requirements in Part 9 of the [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard RGC Standard for SBS-modified Bitumen Membrane Roofs], published in [[Division B | Division B]] of this ''Manual''.
<li>Fully adhered membranes means membranes that are torch-applied, self-adhered, hot-mopped, or adhesive-applied; no other applications are permissible in ''waterproofing assemblies''.
</li></ol>

====9.1.3.3. Requirements for Hot Fluid-applied Rubberized Asphalt Systems====

<ol>
<li>The field application of hot fluid-applied rubberized asphalt ''waterproofing systems'' on structural ''decks'' at grade shall conform to the requirements in Part 9 of the [https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs], published in [[Division B | Division B]] of this ''Manual''.
</li></ol>

====9.1.3.4. Control Joints (Area Dividers)====

<ol>
<li>When ''control joints'' (system dividers) are recommended or required by the ''manufacturer'', or are deemed necessary by the ''Design Authority'', they must be designed following the requirements in [[#10.1.6.2. Control Joints (Area Dividers) | Article 10.1.6.2.]]
</li></ol>

====9.1.3.5. Securement====
(See [[Notes to GLW Standard#A-9.1.3.3. | Note A-9.1.3.3.]])

<ol>
<li>''Waterproofing assemblies'' that are exposed to wind loads must be secured to resist displacement by ''specified wind loads'', and therefore the requirements in this Article shall be read together with the requirements in [[#Part 3 - Securing the Waterproofing Assembly | Part 3]] of this Standard.
</li></ol>

====9.1.3.6. Membrane Protection====

<ol>
<li>The design must specify immediate protection of a newly installed, fully reinforced membrane, using materials specified or deemed suitable by the ''manufacturer''.
<li>Installed membranes must be protected with materials conforming to the requirements in [[#9.2.1.3. Protection Materials | Article 9.2.1.3.]], using methods conforming to the requirements in [[#9.3.2.7. Protection of Membranes | Article 9.3.2.7.]]
<li>Installed membranes must be protected from damage caused by
<ol>
<li>any walkway surface,
<li>work performed concurrently or subsequently by other trades (the ''Design Authority'' is strongly urged to direct the work of other trades through specific, explicit directives in the design specifications), and
<li>chemicals or other contaminants that may adversely impact the waterproofing membrane or other ''system'' components, including (without limitation)
<ol>
<li>animal or vegetable grease,
<li>hot pipes (release valves),
<li>petroleum products or bi-products, and
<li>miscellaneous fluids from equipment (See also [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6.]] for application of reinforced liquid membrane flashing around roof penetrations).
</li></ol>
</li></ol>
<li>Membranes should be protected from
<ol>
<li>pool or garden chemicals and fertilizers,
<li>pet urine,
<li>bird excrement, and
<li>refrigerants.
</li></ol>
</li></ol>
</li></ol>

====9.1.3.5. Walkways====

<ol>
<li>The membrane must be suitably protected from mechanical damage by walkway surfaces.
<li>Paver walkway surfaces must be suitably supported in keeping with [[#14.1.3.11. Wearing Surfaces | Article 14.1.3.11.]] and [[#14.3.2.5. Wearing Surfaces | Article 14.3.2.5., "Wearing Surfaces"]].
</li></ol>

===9.1.4. Reserved===

===9.1.5. Uninsulated Systems===
(The requirements in [[#9.1.3. All Systems | Subsection 9.1.3., "All Systems"]], shall be read together with the following articles)

====9.1.5.1. General Requirements====

<ol>
<li>The installed membrane must be immediately protected with materials specified or deemed suitable by the ''manufacturer''.
</li></ol>

===9.1.6. Protected Systems===
(The requirements in [[#9.1.3. All Systems | Subsection 9.1.3., "All Systems"]], shall be read together with the following articles)

====9.1.6.1. General Requirements====

<ol>
<li>Ballasted systems shall conform to the requirements in [[#3.3.5.1. Ballasted Systems | Article 3.3.5.1.]] of the related ''waterproofing roof'' Standard, and in [[#9.1.3.3. Securement | Article 9.1.3.3.]] of this Standard.
</li></ol>

==Section 9.2. Materials==
(See [[Division_C | Division C]])

===9.2.1. Material Properties===
====9.2.1.1. Membrane Composition, Thickness, and Selection====

<ol>
<li>In addition to the minimum membrane thickness requirements in Sub-section 9.1.3., membranes shall conform to the requirements in Article 9.2.1.1. of the published RGC Standard for the specific membrane:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
</li></ol>

====9.2.1.2. Reserved====

====9.2.1.3. Protection Materials====

<ol>
<li>Membrane protection materials shall be compatible with the primary membrane, resist puncturing, and (except for ‘hot rubber’) resist bonding with the membrane.
<li>Materials used to protect an SBS-modified bituminous membrane must be
<ol>
<li>an RGC-accepted asphaltic core board measuring at least 4.76 mm (3/16”) thick,
<li>an RGC-accepted cap sheet at least 4.0 mm thick, or
<li>a protection mat acceptable to the membrane ''manufacturer''.
</ol></li>
<li>Materials used to protect a hot fluid-applied rubberized asphalt membrane must be acceptable to and specified by the ''manufacturer'' and shall be either
<ol>
<li>an RGC-accepted asphaltic core board measuring at least 4.76 mm (3/16”) thick, conforming to CSA-A123.25, or
<li>SBS-modified bituminous sheet membranes which shall be
<ol>
<li>reinforced with a non-woven polyester scrim no less than 180g/m2, or with a composite scrim of equal puncture resistance,
<li>no less than 2.0 mm (80 mils) thick, when measured in the middle of the membrane sheet, and
<li>sanded on the underside.
</ol></li>
</ol></li>
<li>Filtration fabrics shall conform to the requirements in [[#7.2.1.4. Filter Fabric | Article 7.2.1.4.]]
</ol></li>

===9.2.2. Materials Storage and Handling===
====9.2.2.1. Protection from the Weather====

<ol>
<li>All uninstalled materials must be protected from weather by properly stacking them above ground, or above the ''waterproofing system'' surface, in or beneath covers that are weather-resistant and secured against displacement by wind (See also [[#4.2.1.1. Use of Accepted Materials | Article 4.2.1.1. Use of Accepted Materials]]).
</ol></li>

===9.2.3. Accessories===
====9.2.3.1. Accessories Supplied by Membrane Manufacturer====

<ol>
<li>All membrane accessory components must be supplied by and acceptable to the ''manufacturer'', as stipulated in [[#9.1.3.1. General Requirements for All Systems | Article 9.1.3.1.]]
</ol></li>

==Section 9.3. Application==
===9.3.1. Guarantee Term Requirements===
====9.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====9.3.1.2. Reserved====

===9.3.2. All Systems===
====9.3.2.1. Preparation of Substrate====

<ol>
<li>All supporting Decks must be acceptable to the manufacturer and must be prepared according to the requirements published in the applicable RGC Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.3.2.1._Preparation_of_Substrate Article 9.3.2.1.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.3.2.1._Preparation_of_Substrate Article 9.3.2.1.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>In addition to the above, the following requirements apply:
<ol>
<li>Pitted, honey-combed surfaces, or surfaces with a Concrete Surface Profile (CSP) greater than 5 must be repaired by others before the membrane application, following acceptable repair practices (e.g., International Concrete Repair Institute technical guidelines, including “210.4R-2021 (PDF) - Guide for Nondestructive Evaluation Methods for Condition Assessment, Repair, and Performance Monitoring of Concrete Structures”).
<li>Concrete ''decks'', ''walls'', ''curbs'' and equipment pads are not to receive adhered waterproofing for a minimum of 28 days after pouring unless expressly instructed in writing by the Project Structural Engineer; ''decks'' formed with shot-crete and lightweight insulating concrete are not acceptable substrates for waterproofing under the RoofStar Guarantee Program (See [[#2.1.5.2. Concrete Decks | Article 2.1.5.2.]]).
<li>The moisture content levels of concrete surfaces, Decks, walls, curbs and equipment pad surfaces, must strictly comply with the membrane manufacturer’s published moisture level application limitations.
<li>All concrete surfaces to receive adhered waterproofing shall be structurally sound, water cured, finished to a Concrete Surface Profile (CSP) from 3 to 5, have a light hair broom finish or be prepared by mechanical means and shall be primed, when applicable, with a membrane ''manufacturer’s'' approved primer (See [[Notes to GLW Standard#A-9.3.2.2.(2) | Note A-9.3.2.2. (2))]].
<li>''Curbs'', blocking, and nailing strips should be installed where required prior to the waterproofing ''Contractor's'' acceptance of the ''deck''.
<li>Pre-cast panels, post-stressed beams, or “T” and cavity ''decks'' shall have a minimum 50mm (2”) concrete topping applied over the ''deck'' prior to the application of the waterproofing membranes.
<li>Where a difference exists in the levels of adjacent surfaces, the general contractor or others shall install approved non-shrink grout or ground to match level of adjacent surfaces.
<li>Grouting or grinding shall be feathered on the lower surface a minimum distance of twelve times the amount of the vertical differential.
</li></ol>
</li></ol>

====9.3.2.2. Preparation of Waterproofing System Materials====

<ol>
<li>SBS membranes must be unrolled, prepared, and conditioned for installation, as required by the manufacturer.
<li>Product cakes of rubberized asphalt must be
<ol>
<li>heated in a double-jacketed oil bath or hot-air melter to a temperature specified by the ''manufacturer'', and shall not be heated beyond the specified maximum,
<li>maintained at a safe operating temperature, established by the ''manufacturer'', and
<li>continually agitated until installed; avoid heating and agitating the same material for more than six hours.
</li></ol>
</li></ol>

====9.3.2.3. General Requirements for Membrane Application====

<ol>
<li>Membranes shall be installed according to the general and specific requirements of Sub-section 9.3.2. in the applicable RGC Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.3.2._All_Systems Subsection 9.3.2.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.3.2.1._Preparation_of_Substrate Subsection 9.3.2.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
</li></ol>

====9.3.2.4. Cold and Inclement Weather Application====

<ol>
<li>SBS membrane installed during cold weather must follow the membrane ''manufacturer’s'' guidelines for storage and membrane conditioning.
<li>Hot fluid-applied rubberized asphalt shall conform to the following requirements, replicated here from [https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.3.2.4._Cold_and_Inclement_Weather_Application Article 9.3.2.4.] of "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs”
<ol>
<li>Installation during cold weather must follow the manufacturer’s guidelines for storage and membrane conditioning.
<li>When permitted by the ''manufacturer'', membranes may be applied in ambient air temperatures lower than -18⁰ C (0⁰ F), but application below -18⁰ C is not recommended.
<li>Membranes shall not be installed during inclement weather unless expressly permitted by the ''manufacturer'', in writing.
</li></ol>
</li></ol>

====9.3.2.5. Securement on Slopes====

<ol>
<li>''Waterproofing systems'' installed on slopes greater than 1:6 (2” in 12”) are permissible only with a written Variance from the '''''Guarantor'''''.
</li></ol>

====9.3.2.6. Reserved====

====9.3.2.7. Protection of Membranes====

<ol>
<li>Membranes shall be protected according to the general and specific requirements of Sub-section 9.3.2. in the applicable RGC Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.3.2._All_Systems Article 9.3.2.7.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.3.2.1._Preparation_of_Substrate Article 9.3.2.7.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>Membrane protection shall conform to the material requirements in [[#9.2.1.3. Protection Materials | Article 9.2.1.3.]] and shall be completely installed and secured
<ol>
<li>before any construction traffic is permitted on the ''project'' (this prohibition does not apply to workers of the waterproofing trade or moisture monitoring technicians), and
<li>before anyone other than the ''Contractor'' installs any ''overburden''.
</li></ol>
<li>Protection materials shall be installed with tightly fitting butt joints.
<li>Filtration materials shall be overlapped and secured behind linear metal flashings.
</li></ol>

====9.3.2.8. Transitions with Water-shedding Systems====

<ol>
<li>Where slopes less than 1:16 (3/4" in 12") intersect a ''water-shedding system'', the ''waterproofing system'' must be designed to extend up the ''water-shedding system'' slope as described in [[#10.3.7.2. Intersections with Water-Shedding Roofs | Article 10.3.7.2.]], using methods conforming to the general application requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]]
</li></ol>

====9.3.2.9. Walkways====

<ol>
<li>Any walkway pads or supports capable of absorbing solar radiation must be installed on a non-bonding slip sheet, to protect the membrane from damage by heat.
<li>When pavers are used as the walkway material, they must be
<ol>
<li>spaced no closer than 3.18 mm (1/8″),
<li>supported by non-abrasive pads or proprietary pedestals providing a minimum of 12.7 mm (1/2″) of vertical separation to permit adequate airflow and leveling (Slip sheets under pedestals may be necessary to prevent membrane abrasion), and
<li>secured against displacement by wind.
</li></ol>
</li></ol>

===9.3.3. Membrane Application Methods===
(The requirements in [[#9.3.2. All Systems | Subsection 9.3.2., "All Systems"]], shall be read together with the following article)

====9.3.3.1. Additional Requirements for SBS-modified Bituminous Membranes====

<ol>
<li>The application of the following membrane types shall follow the referenced requirements in the “RGC Standard for SBS-modified Bitumen Membrane Roofs”:
<ol>
<li>Self-adhered and Cold-processed membranes shall be installed to conform to the requirements of [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.3.3.1._Self-adhered_and_Cold-processed_Membranes Article 9.3.3.1.]
<li>Hot Asphalt-adhered membranes shall be installed to conform to the requirements of [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.3.3.3._Hot_Asphalt-adhered_Membranes Article 9.3.3.3.]
<li>Torch-applied membranes shall be installed to conform to the requirements of [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.3.3.4._Torch-applied_Membranes Article 9.3.3.4.]
<li>Liquid membrane systems accepted for field application as a second layer in a multi-ply SBS-modified bituminous membrane system shall be installed to conform to the requirements of [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.3.3.5._Liquid_Membranes_.28Field_Application.29 Article 9.3.3.5.]
</li></ol>
</li></ol>

===9.3.4. Reserved===

===9.3.5. Uninsulated Systems===
(The requirements in [[#9.3.2. All Systems | Subsection 9.3.2., "All Systems"]], shall be read together with the following articles)

====9.3.5.1. Reserved====

====9.3.5.2. Membranes Installed on Concrete====

<ol>
<li>Concrete ''decks'' shall be prepared as required in [[#9.3.2.1. Preparation of Substrate | Article 9.3.2.1.]], the application of the primary membrane shall conform to the general requirements in [[#9.3.2.3. General Requirements for Membrane Application | Article 9.3.2.3.]] and (for SBS-modified bituminous membranes) the specific requirements in [[#9.3.3.1. Additional Requirements for SBS-modified Bituminous Membranes | Article 9.3.3.1.]]
</li></ol>

====9.3.5.3. Reserved====

====9.3.5.4. Reserved====

====9.3.5.5. Reserved====

====9.3.5.6. Membrane Protection====
<ol>
<li>Installed membranes must be protected from damage as soon as possible after integrity testing (Refer to [[#9.3.2.7. Protection of Membranes | Article 9.3.2.7.]] for general requirements).
</li></ol>

===9.3.6. Protected Waterproofing Systems===
(The requirements in [[#9.3.2. All Systems | Subsection 9.3.2., "All Systems"]], shall be read together with the following articles)

====9.3.6.1. Reserved====

====9.3.6.2. Membrane Protection====

<ol>
<li>Installed membranes must be protected from damage as soon as possible after integrity testing (Refer to [[#9.3.2.7. Protection of Membranes | Article 9.3.2.7.]] for general requirements).
</ol></li>

====9.3.6.3. Procurement and Installation of Other Materials====

<ol>
<li>All components of a ''waterproofing system'', including the gravel or paver ballast, must be supplied and installed by the ''Contractor''.
</ol></li>

<hr>

<div id=PART_10></div>

=Part 10 - Perimeters and Walls=
==Section 10.1. Design==
===10.1.1. General===
====10.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====10.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===10.1.2. Guarantee Term Requirements===
====10.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====10.1.2.2. Reserved====

===10.1.3. All Systems===
====10.1.3.1. General Requirements====

<ol>
<li>The ''Design Authority'' is responsible to specify the connections between the ''waterproofing system'' and ''walls'' or other building components, particularly where the ''continuity'' of air, vapour and water-resistive ''control layers'' is critical or required by Code (See [[#Part 6 - Air and Vapour Controls | Part 6, "Air and Vapour Controls"]]).
<li>''Projects'' must follow proper sequencing; materials must positively integrate (“shingle fashion”) with other materials, ''systems'', or ''assemblies'', including those installed by other trades.
<li>''Wall'' surfaces must be suitable to receive waterproofing materials, or they must be covered with an accepted overlay panel material listed in [[Division_C | Division C]].
<li>Where the structural slab at grade and an adjoining ''wall'' are constructed of dissimilar materials (i.e., concrete ''deck'' joined to a steel wall), differing expansion and contraction rates for the two materials may adversely affect the ''waterproofing system'' and, in particular, the field and flashing membranes, and therefore it is incumbent upon the ''Design Authority'' to consult the ''manufacturer's'' literature and specify the correct materials for each particular ''deck-wall'' intersection.
</li></ol>

====10.1.3.2. Membrane Flashing====

<ol>
<li>All changes in plane in the ''waterproofing system'', and all intersections between the system field and edges, ''walls'', or ''parapets'', must be flashed using the means and methods described and required in Article 10.1.3.2. of the applicable RGC Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#10.1.3.2._Membrane_Flashing Article 10.1.3.2.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#10.1.3.2._Membrane_Flashing Article 10.1.3.2.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>No UV-sensitive membrane may be left exposed and must be fully protected with
<ol>
<li>the manufacturer’s proprietary protection material, or
<li>base metal flashings.
</li></ol>
<li>All other specifications shall follow the application requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]]
<li>Sheet membrane flashing must be self-adhered, adhered with adhesives, or with torch-applied heat, and shall conform to the requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]]
<li>Linear metal flashing, or a RoofStar-accepted, fleece-reinforced 2-component polymethyl methacrylate (PMMA) liquid membrane flashing, is required at all edges, upper membrane terminations, curb tops, and at the tops of ''parapets'', to protect sheet membrane flashing from damage.
<li>Linear metal flashing used for the termination of sheet membrane flashing plies shall be installed in keeping with [[#Article 13.1.3.3. Securement | Article 13.1.3.3. Securement]].
<li>Sheet membrane flashing must be protected from damage caused by foot traffic or shifting coverings, using base metal flashing or other methods acceptable to the '''''Guarantor'''''.
<li>Where a ''waterproofing assembly'' allows water to freely drain off the edge, and that assembly adjoins a ''wall'', a cricket or diverter should be installed at the ''deck'' edge to prevent water intrusion behind vulnerable wall finishes.
</li></ol>

===10.1.4. Perimeter Details, Walls, and Openings===
(The requirements in [[#10.1.3. All Systems | Subsection 10.1.3., "All Systems"]], shall be read together with the following Articles)

====10.1.4.1. Parapets====

<ol>
<li>While most ''waterproofing assemblies'' drain over the ''deck'' edge (See [[#10.1.4.2. Deck (Slab) Edge | Article 10.1.4.2.]]), when ''parapets'' are specified or required they may be waterproofed before a coping, its membrane, and metal coping (cap) flashing are installed, but the coping will be excluded from coverage unless the ''parapet'' membranes are carried onto and over the coping in accordance with the application requirements described in [[#10.3.4. Perimeter Details, Walls, and Opening | Subsection 10.3.4.]]
<li>On structural ''decks'' exposed to wind load, where ''overburden'' or ballast extends to the ''deck'' edge, ''parapets'' must be designed to retain the material against wind scouring, but in any event, they shall be no less than 203.2 mm (8”) in height when measured from the top of the ''finished system surface''.
<li>With the exception of Sentence (1), ''parapets'' are optional unless required by Code or the Authority Having Jurisdiction, but when a ''parapet'' is specified or otherwise required by this Standard, it must be no less than 127.0 mm (5") in height, measured from the ''finished system surface'' to the inside top edge of the ''parapet'' (this height requirement facilitates proper metal cap flashing securement) (Ref. [[#10.3.4. Perimeter Details, Walls, and Opening | Subsection 10.3.4.]]; also see [[#13.3.2.3. Cap Flashing, Counterflashing, and Reglet Flashing | Article 13.3.2.3. Cap Flashing, Counterflashing, and Reglet Flashing]]).
<li>A ''parapet'' ''wall'' measuring no less than 203.2 mm (8”) is required at the edge of the ''deck'' where the deck is not supported by an adjacent ''wall'', and an ''expansion joint'' ([[#10.1.6.1. Expansion Joints | Article 10.1.6.1.]]) shall join the two at the top of the parapet (See the Expansion Joint (Wall) construction detail).
<li>''Parapets'' with cavities must be designed with consideration for ventilation.
<li>All ''parapet'' copings that form part of the ''Contractor’s'' scope of work must provide solid support for metal coping (cap) flashings and shall be suitable to receive mechanical fasteners (Ref. [[#13.1.3.6. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.1.3.6.]]; also see [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]).
<li>When the width of any ''parapet'' exceeds 101.6 mm (4"), the coping (installed by other trades) must
<ol>
<li>slope toward the waterproofing side of the ''parapet'' ''wall'', and shall
<li>be sloped to meet the minimum requirements for metal coping (cap) flashing in '''Table 13.1.3.4.-A''', [[#13.1.3.4. Gauge, Dimension Limitations, and Seams | Article 13.1.3.4.]]
</li></ol>
<li>Membranes specified for ''parapets'' with a pre-cast or stone coping must be at least 2.5 mm thick and shall be manufactured with a sanded top surface.
</li></ol>

====10.1.4.2. Deck (Slab) Edges====

<ol>
<li>Where a ''waterproofing assembly'' ''deck'' terminates flush with the drainage plane, the ''waterproofing system'' must be designed to seal and waterproof the transitions between the horizontal ''deck'' and any vertical ''walls'' below grade.
</li></ol>

====10.1.4.3. Tall Parapets====

<ol>
<li>When a ''parapet'' higher than 609.6 mm (24") (a tall parapet) is specified as part of the ''Contractor’s'' scope of work,
<ol>
<li>membranes specified for the vertical surface of the ''wall'', above the primary waterproofing membrane flashing, must conform to the requirements in [[#10.2.1.1. Flashing Membranes | Article 10.2.1.1.]], and
<li>additional mechanical securement shall conform to the requirements in this Part, or to the requirements of the ''manufacturer'', whichever is greater.
</li></ol>
<li>All ''waterproofing system'' intersections with ''walls'' shall conform to the requirements in [[#10.1.3. All Systems | Subsection 10.1.3. All Systems]], and shall maintain continuity with the ''wall'' control layers for air, vapour, and water.
<li>''Tall parapets'' with cavities must be designed with consideration for ventilation.
</li></ol>

====10.1.4.4. Reserved====

====10.1.4.5. Doors, Windows, and Wall Openings====

<ol>
<li>Rough openings formed or framed in walls to accommodate doors, windows, curtain-wall assemblies, or other penetrations (i.e., ventilation grilles), should be oversized to allow for the build-up of ''waterproofing system'' flashing membrane.
<li>Low-clearance openings (rough openings less than 203.2 mm (8") in height, measured from the ''finished system surface'')
<ol>
<li>should be avoided, particularly when designing a ''waterproofing system'' to support any type of ''overburden'', and
<li>are not recommended because of their propensity to overflow (water overflowing through a low opening is not covered by a '''''RoofStar Guarantee''''').
</li></ol>
<li>When a low-clearance opening is unavoidable or specified (i.e., to comply with Code for level access and egress),
<ol>
<li>the ''deck'' must be sloped away from the opening,
<li>the rough opening shall not be less than 101.6 mm (4") above the ''drainage plane'' and must be waterproofed in keeping with the requirements in [[#10.3.4.5. Doors, Windows, and Wall Openings | Article 10.3.4.5.]],
<li>the ''drainage plane'' must be free of obstructions and materials capable of displacing water,
<li>the low-clearance opening should be protected by an overhang wherever practical, to minimize water intrusion that occurs from wind-driven rain or from snow accumulation, and
<li>the opening must be protected by an ''overflow drain'', if drainage over the ''deck'' edge is blocked by a ''parapet'',
<ol>
<li>situated on the same roof area as the low-clearance opening,
<li>located at least 25.4 mm (1") below the elevation of the rough opening, and
<li>conforming to the spacing and capacities required by the "National Plumbing Code of Canada", Division B, [https://nrc-publications.canada.ca/eng/view/ft/?id=6e7cabf5-d83e-4efd-9a1c-6515fc7cdc71#%5B%7B%22num%22%3A310%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C250%2Cnull%5D Article 2.4.10.4.] (See also [[#11.1.3.1. Principles of Design | Article 11.1.3.1., "Principles of Design"]]).
</li></ol>
</li></ol>
<li>When the building interior transitions to an accessible surface through a flush door opening,
<ol>
<li>the design shall conform to the requirements in this Part, and to [[#14.1.3.11. Wearing Surfaces | Article 14.1.3.11.]], and
<li>the membrane installed over the rough opening sill must be protected from abrasion damage as described in [[#10.3.4.5. Doors, Windows, and Wall Openings | Sentence 10.3.4.5.(6)]] below.
</li></ol>
</li></ol>

===10.1.5. Reserved===
===10.1.6. Expansion and Control Joints===
(The requirements in [[#10.1.3. All Systems | Subsection 10.1.3., "All Systems"]], shall be read together with the following Articles)

====10.1.6.1. Expansion Joints====
(See [[Notes to GLW Standard#A-10.1.6.1.| Note A-10.1.6.1.]])

<ol>
<li>The design and placement of structural ''expansion joints'' is the responsibility of the ''Design Authority'', but they must be considered wherever
<ol>
<li>expansion or contraction joints are provided in the structural assembly,
<li>differential movement between structural components may occur (i.e., where a ''wall'' and the ''deck'' are separately supported, or
<li>seismic movement is anticipated.
</li></ol>
<li>The location of ''expansion joints'' must be clearly indicated on the drawings, drawn in detail, and included in the specifications.
<li>Proprietary elastomeric ''expansion joint'' systems are covered under the '''''RoofStar Guarantee Program''''' as an accessory to the accepted primary material and (except where the condition of Sentence 10.1.4.1.(6) applies) may be used at the drainage plane provided the expansion joint system is
<ol>
<li>manufactured with an EPDM-based core and flanges that can be fully bonded to the primary membrane,
<li>accepted for use in the '''''RoofStar Guarantee Program''''',
<li>compatible with the waterproofing membrane and acceptable to the membrane ''manufacturer'',
<li>designed and manufactured to accommodate building movements of at least 500% elongation at -40° C (-40° F) across its length and at all vulcanized points,
<li>factory-fabricated by means of vulcanization,
<li>manufactured as one piece, complete with all joints, details and connections,
<li>bonded with the primary membrane in a manner acceptable to the manufacturers of both the expansion joint and the membrane to which it will be bonded, and
<li>protected from damage, including foot traffic.
</li></ol>
<li>Field splicing of proprietary elastomeric expansion joints is permitted only when made with a machine acceptable to the expansion joint manufacturer.
<li>Elastomeric expansion joint systems that are not proprietary to the membrane manufacturer are not covered by a '''''RoofStar Guarantee''''' and must be built as a raised structure with a minimum height of 203.2 mm (8"), measured from the ''finished system surface''.
</li></ol>

====10.1.6.2. Control Joints (System Dividers)====
(See [[Notes to GLW Standard#A-10.1.6.2. | Note A-10.1.6.2.]]; also see [[#10.3.6.2. Control Joints (System Dividers) | Article 10.3.6.2.]])

<ol>
<li>The ''Design Authority'' is responsible
<ol>
<li>to determine the need for ''control joints'' (system dividers), and
<li>to specify their location and design.
</li></ol>
<li>The ''Design Authority'' must consider specifying ''control joints''
<ol>
<li>when a single system area exceed 61 m (approx. 200’) in length and the membrane is limited in its flexibility (consult the manufacturer for their recommendations),
<li>for buildings in climate zones with significant seasonal temperature swings,
<li>where an addition joins an existing building,
<li>where the ''deck'' type changes (i.e., steel transitions to wood),
<li>where insulation in the ''waterproofing system'' changes thickness,
<li>where the ''deck'' changes in elevation, and
<li>when interior heating conditions change.
</li></ol>
<li>Specified and detailed ''control joints'' should be located at the high points of the assembly, so that water drains away from both sides of the divider and is not impeded by it.
<li>''Control joints'' must be
<ol>
<li>constructed as a raised divider,
<li>sloped on the top face (this may be bi-directional, or only toward one side),
<li>enveloped with no fewer than two plies of sheet membrane flashing,
<li>at least 127 mm (5”) in height, measured from the ''finished system surface'', when covered with a metal cap flashing (this minimum may be reduced to 101.4 mm (4”) when the metal cap flashing is omitted), and
<li>waterproofed in keeping the requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]], together with the ''manufacturer’s'' published specifications for the detail.
</li></ol>
<li>Unless otherwise approved by the '''''Guarantor''''', ''control joints'' may be specified to divide a new ''system'' (addition) from existing ''systems'' (Ref. [[#1.1.4.5. Tie-ins, Additions, and Alterations to Existing Roofing | Article 1.1.4.5.]]).
</li></ol>

===10.1.7. Intersections with Other Systems===
(The requirements in [[#10.1.3. All Systems | Subsection 10.1.3., "All Systems"]], shall be read together with the following Articles)

====10.1.7.1. Intersections with Water-shedding Systems====

<ol>
<li>Intersections with ''water-shedding systems'' must be designed according to the requirements in [[#10.3.7.2. Intersections with Water-Shedding Roofs | Article 10.3.7.2.]]
</li></ol>

====10.1.7.2. Reserved====

===10.1.8. Alternative Approaches for Membrane Flashing===
(The requirements in [[#10.1.3. All Systems | Subsection 10.1.3., "All Systems"]], shall be read together with the following Articles)

====10.1.8.1. Specifying Hazard-reduction Strategies====

<ol>
<li>The ''Design Authority'' should consider alternatives to heat-applied materials when the application process involves Hot Work (Ref. [[#1.1.3.5. Hot Works | Article 1.1.3.5.]]) and the substrate to which they will be applied is combustible, or when nearby structures, openings, or materials, present a fire hazard; in the alternative, choose a suitable separation or overlay material as protection from open flame.
<li>Self-adhering or adhesive-applied membranes as alternatives to heat-applied membranes are acceptable to the '''''Guarantor''''' and must also be acceptable to the ''manufacturer''.
<li>The application of materials to a combustible surface, using a torch, is strictly prohibited (Refer to [[#10.3.8. Alternative Approaches to Sheet Membrane Flashing | Sub-section 10.3.8., "Alternative Approaches to Sheet Membrane Flashing"]], for application requirements).
</li></ol>

==Section 10.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===10.2.1. Material Properties===
====10.2.1.1. Flashing Membranes====

<ol>
<li>Sheet membranes used to flash the intersection of the system field and perimeter ''walls'' must conform to the membrane requirements found in [[#9.2.1.1. Membrane Composition, Thickness, and Selection | Article 9.2.1.1.]] of the related ''waterproofing roof'' Standard.
<li>When waterproofing a ''tall parapet'' above the primary membrane system is specified as part of the ''Contractor's'' scope of work (Ref. [[#10.1.4.3. Tall Parapets | Article 10.1.4.3.]] and [[#10.3.4.3. Tall Parapets | Article 10.3.4.3.]]), the membrane shall
<ol>
<li>be compatible with the primary membrane,
<li>be self-adhering,
<li>be declared suitable for the application by the ''manufacturer'' (see [[Notes to GLW Standard#A-10.2.1.1.(2)(3) | Note A-10.2.1.1.(2)(3)]]),
<li>possess properties consistent with the design and characteristics of the ''wall'' assembly,
<li>possess a high softening point and a minimum flow temperature of 87.7°C (190°F) (ASTM D5147, "Standard Test Methods for Sampling and Testing Modified Bituminous Sheet Material") and
<li>have a thickness no less than 1 mm (.040”).
</li></ol>
<li>Some membranes may be susceptible to damage from bird droppings, pet urine, and chemical contamination (oils, solvents, or any discharge from a mechanical unit), and therefore they should be protected using measures designed in consultation with the ''manufacturer''.
<li>Fleece-reinforced liquid membrane flashing systems must be accepted by the '''''Guarantor''''' and proprietary to, or accepted by, the ''manufacturer''.
</li></ol>

====10.2.1.2. Linear Metal Flashing====

<ol>
<li>''Linear metal flashing'' incorporated into perimeters and ''walls'' of the ''waterproofing system'' must conform to the materials and fabrication requirements in [[#Part 13 - Linear Metal Flashing | Part 13, "Linear Metal Flashing"]].
</li></ol>

====10.2.1.3. Reserved====
====10.2.1.4. Sealants====

<ol>
<li>Sealants applied to ''linear metal flashing'', where sheet membrane flashing is terminated, shall conform to the requirements in [[#13.2.1.4. Sealants | Article 13.2.1.4.]]
</li></ol>

===10.2.2. Securement Materials===
====10.2.2.1. Fasteners====

<ol>
<li>Where fasteners are used in the waterproofing system''
<ol>
<li>to secure waterproofing materials, they shall conform to the requirements in [[#3.2.2.1. Fasteners | Article 3.2.2.1.]] of the related ''waterproofing roof'' Standard.
<li>to secure ''linear metal flashings'', they shall conform to the requirements in [[#13.2.1.4. Sealants | Article 13.2.1.4.]]
</li></ol>
</li></ol>

==Section 10.3. Application==
===10.3.1. Guarantee Term Requirements===
====10.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====10.3.1.2. Reserved====

===10.3.2. All Systems===
====10.3.2.1. Substrate Preparation====

<ol>
<li>All wall surfaces to which waterproofing materials must be installed (including Concrete Masonry Unit (CMU)) shall be
<ol>
<li>prepared in like manner to the ''deck'' (Ref. [[#9.3.2.1. Preparation of Substrate | Article 9.3.2.1.]]) and declared suitable by the ''manufacturer'', or
<li>covered with a RoofStar-accepted overlay panel conforming to the material requirements in [[#5.2.1.3. Overlays for Walls | Article 5.2.1.3.]] and installed to conform to [[#5.3.2.5. Support, Arrangement, and Securement of Wall Overlays | Article 5.3.2.5.]]
</li></ol>
<li>Wherever the primary membrane will be applied, gaps or cracks that exceed 1.59 mm (1/16”) in width must be reinforced prior to the application of the membrane using the ''manufacturer’s'' proprietary reinforcement material.
</li></ol>

====10.3.2.2. Material Preparation====

<ol>
<li>Membranes preparation shall conform to the general and specific requirements of Article 10.3.2.2. in the applicable RGC Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#10.3.2.2._Material_Preparation Article 10.3.2.2.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#10.3.2.2._Material_Preparation Article 10.3.2.2.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>SBS-modified bitumen membrane flashing shall be prepared following the requirements in the "RGC Standard for SBS-modified Bitumen Membrane Roofs".
</li></ol>

====10.3.2.3. General Application Requirements for Perimeters and Walls====

<ol>
<li>The general application requirements for perimeters and walls shall conform to the general and specific requirements of Article 10.3.2.3. in the applicable RGC Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#10.3.2.3._General_Application_Requirements_for_Perimeters_and_Walls Article 10.3.2.3.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#10.3.2.3._General_Application_Requirements_for_Perimeters_and_Walls Article 10.3.2.3.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>Cold joints between concrete pours, at transitions between horizontal ''decks'' and vertical ''walls'' below grade, shall be sealed and covered with waterproofing membrane flashing that is
<ol>
<li>compatible with any foundation or ''wall'' waterproofing or damp proofing, and
<li>extends at least 203.2 mm (8”) past any joints between the ''deck'' and a ''wall''.
</li></ol>
<li>Whenever materials at ''deck'' and below grade ''wall'' transitions are not compatible with one another, sealants and mechanically attached termination bars are acceptable, to create a watertight lap a minimum 203.2 mm (8") in width.
<li>When damp proofing of below-grade ''walls'' is completed before waterproofing of the structural slab at grade, or the backfill against blind-side waterproofing prevents a below-grade seal by the ''Contractor'', a waterproofing membrane-compatible membrane should be installed by the damp proofing contractor and extended onto the horizontal plane of the slab, to permit a positively draining, watertight seal.
</li></ol>
</li></ol>

====10.3.2.4. Protection of Membranes====

<ol>
<li>All installed membranes must be protected from splashed or dripped primer (applicable to all trades).
<li>Membrane flashing must be protected from damage caused by UV radiation, foot traffic, or shifting coverings, using a ''linear metal flashing'' (i.e., base flashing) or other methods acceptable to the '''''Guarantor'''''.
<li>Protection materials shall be installed as required in [[#9.3.2.7. Protection of Membranes | Article 9.3.2.7.]]
<li>When an integrity scan is not required because the conditions in [[#1.1.3.3. Membrane Integrity Testing | Article 1.1.3.3.]] have been satisfied, the ''Contractor'' shall nevertheless protect installed field membranes and membrane flashing, immediately after installation, with RoofStar-accepted membrane protection materials.
</li></ol>

===10.3.3. Additional Requirements for Membrane Flashing===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.3.1. Membrane Flashing for SBS-modified Bituminous Sheet Membranes====

<ol>
<li>The application of permitted SBS-modified bituminous sheet membrane flashing shall conform to the general and specific requirements of Subsection 10.3.3. in the applicable RGC Standard for roofs, and shall be read together with Subsection 10.3.2. in the same Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#10.3.3._Additional_Requirements_for_Membrane_Flashing Subsection 10.3.3.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#10.3.3._Additional_Requirements_for_Membrane_Flashing Subsection 10.3.3.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
</li></ol>

===10.3.4. Perimeter Details, Walls, and Openings===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.4.1. Additional Requirements for Parapets, Walls, and Openings in Walls====

<ol>
<li>The additional application requirements for waterproofing materials at the perimeter, on walls, and at openings in walls, shall conform to the general and specific requirements in Articles 10.3.4.1., 10.3.4.3, and 10.3.4.5. of Subsection 10.3.4. in the applicable RGC Standard for roofs and shall be read together with Subsection 10.3.2. in the same Standard:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#10.3.4._Perimeter_Details.2C_High_Walls.2C_and_Openings Subsection 10.3.4.] in the RGC Standard for SBS-modified Bituminous Membrane Roofs.
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#10.3.4._Perimeter_Details.2C_High_Walls.2C_and_Openings Subsection 10.3.4.] in the RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs.
</li></ol>
</li></ol>

===10.3.5. Reserved===
===10.3.6. Expansion and Control Joints===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.6.1. Expansion Joints====
(See [[#10.1.6.1. Expansion Joints | Article 10.1.6.1.]])

<ol>
<li>When proprietary elastomeric ''expansion joint'' systems in the ''drainage plane'' are specified, the bond between the sheet membrane flashing and the ''expansion joint'' system must be acceptable to both the ''manufacturer'' and the supplier of the expansion joint system (Ref. [[#10.1.6.1. Expansion Joints | Article 10.1.6.1.]] for design requirements).
<li>Backer rods, insulation, or any other materials installed inside the cavity below the expansion joint may be installed by the ''Contractor'' but are not considered part of the system and therefore are excluded from coverage under a '''''RoofStar Guarantee'''''.
<li>Field splicing of proprietary elastomeric ''expansion joints'' is permissible only when made with a machine acceptable to the expansion joint manufacturer.

</li></ol>

====10.3.6.2. Control Joints (Roof Dividers)====

<ol>
<li>''Control joints'' must be waterproofed in keeping the requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]], together with the ''manufacturer’s'' published specifications for the detail.
</li></ol>

===10.3.7. Intersections with Other Systems===
(The requirements in [[#10.3.2. All Systems | Subsection 10.3.2., "All Systems"]], shall be read together with the following Articles)

====10.3.7.1. Compatibility of Materials====

<ol>
<li>Where a ''waterproofing system'' intersects with a different system, materials must be
<ol>
<li>compatible with each other, or
<li>must be separated from contact by an intermediate separation layer.
</li></ol>
</li></ol>

====10.3.7.2. Intersections with Water-Shedding Systems====
(See [[Notes to GLW Standard#A-10.3.7.2. | Note A-10.3.7.2.]])

<ol>
<li>When a ''waterproofing system'' transitions up a slope and underlaps a ''water-shedding system'',
<ol>
<li>sheet membrane flashing must extend up the ''water-shedding roof system'' slope at least
<ol>
<li>152.4 mm (6”), plus at least 76.2 mm (3”) for the overlap by the ''water-shedding system'', when measured vertically from the maximum water level, and
<li>304.8 mm (12”) plus at least 76.2 mm (3”) for the overlap by the ''water-shedding system'', when measured vertically from the maximum water level, in regions with typical heavy snow,
</li></ol>
<li>the termination of the ''waterproofing system'' sheet membrane flashing on the slope must be mechanically secured, separately from the ''water-shedding system'', and
<li>the overlapping adjoining system materials must conform to the requirements for the specific ''water-shedding system''.
</li></ol>
</li></ol>
</li></ol>

====10.3.7.3. Reserved====

===10.3.8. Alternative Approaches to Sheet Membrane Flashing===

====10.3.8.1. General====

<ol>
<li>When field membranes or flashing plies are heat-welded, or when construction sequencing requires strategies for mitigating fire risk, the ''Contractor'' is responsible to assess risks and should consider the means and methods in [[#10.3.8. Alternative Approaches to Sheet Membrane Flashing | Subsection 10.3.8.]] of the "RGC Standard for SBS-modified Bitumen Membrane Roofs.":
</li></ol>

<hr>

<div id=PART_11></div>

=Part 11 - Drainage=
<div id="DRAIN_DESIGN"></div>
==Section 11.1. Design==
===11.1.1. General===
====11.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====11.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Bi-Level Drain'' means a drain with two inlets, each at a different elevation; these drains are typically used on roofs supporting ''overburden'' and are not to be used as an ''overflow''.
<li>''Drain leader'', as used in this Standard, means "a pipe that is installed to carry ''storm water'' from a ''waterproofing assembly'' to a ''storm building drain'' or ''sewer'' or other place of disposal” ("British Columbia Plumbing Code", Division A, [https://free.bcpublications.ca/civix/document/id/public/bcpc2018/bcpc_2018dap1s14 Article 1.4.1.2., "Defined Terms"]).
<li>''Flanged insert drain'' means a ''primary drain''
<ol>
<li>with a flat, broad flange that encircles, and is manufactured from the same material as, the drain opening or bowl,
<li>that is spun or hot-welded (not cast),
<li>that typically is secured to the ''waterproofing assembly'' with screw-type mechanical fasteners, and
<li>that is manufactured with a short length of drain pipe ("drain stem"), which is inserted into a ''drain leader'' and sealed against back-flow using a compression seal.
</li></ol>
<li>''Overflow drain'' ("overflow") means a ''secondary drain''
<ol>
<li>that serves as a safeguard when ''primary drains'' fail, and
<li>which may be located in the ''waterproofing system'' field (for example, as a secondary drain) or at the perimeter of the ''waterproofing assembly''.
</li></ol>
<li>''Primary drain'' means the primary means the primary collector of storm water for discharge, typically into a ''drain leader''.
<li>''Drain'' means a fitting or device that is installed in a ''waterproofing assembly'' or roof to permit storm water to discharge into a ''drain leader''. (adapted from the "British Columbia Plumbing Code", Division A, [https://free.bcpublications.ca/civix/document/id/public/bcpc2018/bcpc_2018dap1s14 Article 1.4.1.2., "Defined Terms"]).
<li>''Scupper drain'' ("scupper"), which is primarily used on roofs, means an open or closed drain that conveys water laterally from one area of a ''project'' to another, or from the ''project'' directly to the exterior of the building.
<li>''Secondary drain'' means a drain connected to a separate drainage system, typically situated at a higher elevation than a ''primary drain''. An ''overflow drain'' is a type of ''secondary drain''.
</li></ol>
</li></ol>

===11.1.2. Guarantee Term Requirements===
====11.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====11.1.2.2. Reserved====

====11.1.2.3. Reserved====

===11.1.3. All Systems===
====11.1.3.1. Principles of Design====

<ol>
<li>The ''Design Authority'' is responsible for the design of ''project'' drainage and ''continuity'' of ''control layers'', where these intersect with any part of the designed drainage system (Ref. [[#3.1.5.1. Securement against Specified Wind Loads | Article 3.1.5.1.]]; also see [[#6.1.3.2. Continuity of Control Layers | Article 6.1.3.2.]]).
<li>Notwithstanding that most ''waterproofing assemblies'' drain over an edge at grade, when the design requires mechanical drainage, the ''Design Authority'' must design the drainage system with ''drains'' and ''overflows'' sized to accommodate the anticipated precipitation for the building.
<li>Whereas the Building Code may not require the inclusion of ''overflows'' in all circumstances, and the RGC Standards require ''overflows'' in some locations (e.g., in membrane-lined gutters), the incorporation of properly sized and located overflows is strongly encouraged (Also see [[#11.1.4.2. Scuppers and Overflows | Article 11.1.4.2.]]).
<li>The size (flow rate) of ''drains'' and ''overflows'' must be determined using the "British Columbia Building Code" and "British Columbia Plumbing Code", with attention given to both average and large rainfall events (for rainfall capacities, refer to the [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbacr2 "British Columbia Building Code", Div. B, Appendix C, "Table C-2"], which lists rainfall loads using specific reference locations throughout the province (See [[#11.1.3.2. Roof Drain Function and Location | Articles 11.1.3.2.]] and [[#11.1.4.2. Scuppers and Overflows | 11.1.4.2.]] for function and location).
<li>The ''Design Authority'' should coordinate the various disciplines (including, without limitation, mechanical (plumbing) and structural engineers) to calculate proper flow rates, head pressure, and structural supports, in anticipation of significant, short-duration rain events; consideration should be given to various design elements (listed without limitation)
<ol>
<li>''project'' slope (more slope theoretically increases drainage and lessens live loading from rainfall) (Ref. [[#2.1.3.1. General Requirements for Roof Slope | Article 2.1.3.1., "General Requirements for Roof Slope"]]),
<li>rainfall rates for primary and overflow drainage,
<li>''primary'' and ''overflow drain'' capacities,
<li>hydraulic head (pressure), and
<li>the location of the ''drainage plane'' (the ''drainage plane'' is not necessarily the same as the ''finished system surface'', and the location of the ''drainage plane'' may affect the determination of live loads, which should be accounted for as part of drainage design).
</li></ol>
<li>When a ''waterproofing assembly'' or ''water-shedding assembly'' is designed to drain off an edge, water may drain freely or be collected by means of an external or membrane gutter (See [[#11.1.4.3. Membrane Gutters | Article 11.1.4.3.]]) and drained onto a lower roof assembly.
<li>When a ''waterproofing system'' is fully or partially replaced, all flanged drains, ''scuppers'', and ''overflows'', together with internal drain-to-pipe compression seals, and seals exposed to water or ultraviolet light, must be replaced.
<li>If a flow control is present in an existing cast ''drain leader'', the flow control should be reinstalled.
<li>''Waterproofing assemblies'' that support a ''overburden'' or are secured with ballast must be designed to incorporate a ballast guard that surrounds the drain and promotes proper drainage.
</li></ol>

====11.1.3.2. Drain Function and Location====

<ol>
<li>''Drains'' must be used only for draining water.
<li>The use of ''bi-level drains'' with adequate openings for both surface and subsurface drainage are mandatory for all inaccessible ''waterproofing systems'' that utilize interior drainage systems with low permeable wearing courses (poured concrete, bricks, unit masonry and stone set in mortar beds).
<li>''Drains'' on new construction ''projects'' must be located at least 457.2 mm (18") away from any adjacent ''drain'', penetration, upstand, edge, or ''wall'' (the separation space is measured between openings, excluding the flange), but this requirement does not apply to ''overflow drains'', ''scupper drains'', and membrane gutters (Ref. [[#11.3.3.7. Scuppers and Overflows | Article 11.3.3.7.]] for minimum requirements applicable to ''scuppers'' and ''overflows'').
<li>Notwithstanding the requirements in Sentence (1), a cast iron ''roof drain'' with a sump receiver must be placed well away from any interference with drain securement.
<li>When a ''waterproofing system'' is replaced and existing ''drains'' do not comply with the spacing requirements in this Part, the ''Design Authority'' must submit a drawn detail for a review by the ''''''Guarantor'''''; the detail must incorporate the following requirements and principles, together with requirements in [[#11.3.3. Drains | Subsection 11.3.3.]]:
<ol>
<li>''Wall'' membrane flashings must not terminate under the clamping ring of a cast drain.
<li>The clamping ring of a cast drain must be fully seated to ensure the drain will function properly.
</ol></li>
</ol></li>

===11.1.4. Drains and Membrane Gutters===
(The requirements for [[#11.1.3. All Systems | Subsection 11.1.3., "All Systems"]], shall be read together with the following Articles)

====11.1.4.1. Cast Iron Roof Drains====

<ol>
<li>Cast iron ''drains'' may be
<ol>
<li>cast into a concrete slab, or
<li>secured with an under-deck clamp when the ''deck'' is steel.
</li></ol>
<li>Only cast iron ''drains'', and existing external couplers used to connect ''drains'' to leaders, may be re-used for ''waterproofing system'' replacement ''projects''.
</li></ol>

====11.1.4.2. Scuppers and Overflows====

<ol>
<li>A ''scupper drain'' may be used as a ''primary drain'', a ''secondary drain'', or as an ''overflow''.
<li>Overflows, which are emergency stormwater discharge outlets installed to activate when ''primary drains'' are blocked and to prevent structural damage,
<ol>
<li>should be located around the perimeter of a ''waterproofing assembly'', through ''parapets'' (recommended), but
<li>may be a ''secondary drain'' in the field provided it is plumbed in keeping with the “British Columbia Plumbing Code”, Div. B, Subsection 2.4.6 and Article 2.4.10.4. [[Notes to GLW Standard#A-11.1.4.2. | (See Note A-11.1.4.2.)]].
</li></ol>
<li>Where no ''overflows'' are specified, the building structure should be designed to carry the total load of water collected on the ''waterproofing assembly'', in the event of ''primary drain'' failure.
<li>''Overflows'' located at the perimeter of the roof must be
<ol>
<li>designed as open-wall ''scuppers'' for ''parapets'' measuring 152.4 mm (6”) or less in height (Ref. Construction Detail [[SBS Open-wall Scupper Drain | "Open-wall Scupper Drain"]]), or
<li>designed around the principles of a through-wall ''scupper'' when ''parapets'' are higher than 152.4 mm (6”) (Ref. Construction Detail [[SBS Through-wall Scupper Drain | "Through-wall Scupper Drain"]]), and (irrespective of design) shall be
<ol>
<li>located no higher than 101.6 mm (4”) above the ''drainage plane'' at the roof drain (See '''Figure 11.1.4.2.-A'''; also see [[Notes to GLW Standard#A-11.1.4.2. | Note A-11.1.4.2.]]),
<li>installed at least 25.4 mm (1”) lower than the lowest elevation of a door, window, or other low-clearance opening, to prevent water intrusion,
<li>situated so that they freely and visibly discharge storm water,
<li>protected with a ballast guard when the ''overflow'' is located below the ''finished system surface'', and
<li>specified to conform to the spacing and capacities required by the "National Plumbing Code of Canada", Division B, [https://nrc-publications.canada.ca/eng/view/ft/?id=6e7cabf5-d83e-4efd-9a1c-6515fc7cdc71#%5B%7B%22num%22%3A310%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C250%2Cnull%5D Article 2.4.10.4.] (See also [[#11.1.3.1. Principles of Design | Article 11.1.3.1., "Principles of Design"]]).
</li></ol>
</li></ol>
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 11.1.4.2.-A Overflow location relative drainage plane at primary drain''' Forming Part of Article 11.1.4.2. (Click to expand illustration)
|-
| [[File:Part 11 - Illustration - Figure 11.1.4.2.-A.png|link=https://rpm.rcabc.org/images/5/5b/Part_11_-_Illustration_-_Figure_11.1.4.2.-A.png | 600 px]]
|}
</li></ol>

====11.1.4.3. Reserved====

====11.1.4.4. Drains in Planters====

<ol>
<li>''Drains'' designed for structural planters must conform to the requirements in [https://rpm.rcabc.org/index.php?title=VRA_Standard#6.1.3.2._Planter_Drainage Article 6.1.3.2.] of the “RGC Standard for Vegetated Roofs”.
</ol></li>

==Section 11.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===11.2.1. Material Properties===
====11.2.1.1. General Requirements====

<ol>
<li>Except for cast iron ''drains'', which are usually supplied and installed by others, only new ''drains'' and penetration flashings listed in [[Division_C | Division C]] may be used.
<li>All ''drains'' and overflows must conform to CSA ASME A112.6.4-2022/CSA B79.4-2022, "Roof, deck, and balcony drains", unless otherwise permitted by the '''''Guarantor'''''.
<li>Reuse of any penetration flashing or ''drain'' (except serviceable cast iron ''drains'') is prohibited and may void the ''Guarantee'' (See Division A, [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Article 3.2.1.2.]]).
<li>When an existing cast iron ''drain'' is serviceable and reusable, all broken threaded rods, clamping rings, and drain strainers (“baskets”) must be replaced with new components suitable to the specific ''drain''.
<li>Where ''drains'' or ''overflows'' are fabricated from stainless steel, the stainless steel shall be Grade 316L and shall conform to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”.
<li>Sheet membranes used to flash (strip in) ''drains'' shall be reinforced with polyester or a composite scrim, but in any event must conform to the membrane requirements found in [[#9.2.1.1. Membrane Composition, Thickness, and Selection | Article 9.2.1.1.]]
</li></ol>

====11.2.1.2. Drains and Scuppers====
(See [[Notes to GLW Standard#A-11.2.1.2. | Note A-11.2.1.2.]])

<ol>
<li>All ''drains''
<ol>
<li>must be designed and manufactured for ''waterproofing system'' applications only, and shall not be floor drains, and
<li>shall be made so that the waterproofing membrane can be sealed to the drain body or bowl (the membrane seal must not rely solely on a clamping ring).
</li></ol>
<li>Cast iron ''primary drains''
<ol>
<li>must be supplied with a clamping ring, drain strainer, and ballast guard, and
<li>must be installed by the trade supplying the ''drain''.
</li></ol>
<li>When the deck is steel, cast iron ''drains'' should be supplied with an under-deck clamp that is secured separately from the clamping ring and strainer.

<li>Cast iron planter ''drains'' must be supplied with a perforated riser that is proprietary to the drain manufacturer (See the “RGC Standard for Vegetated Roofs”, [https://rpm.rcabc.org/index.php?title=VRA_Standard#6.1.3.2._Planter_Drainage Article 6.1.3.2]).
<li>Cast iron ''scupper drains'' must be
<ol>
<li>supplied with a clamping strainer, and
<li>designed with cast, enclosed (captive) strainer bolt receivers (drains with bolts exposed on the back side of the drain body are not acceptable).
</li></ol>
<li>Lead sheet flashing, when specified, must be sized to extend past the drain bowl by at least 152.4 mm (6”), and must have a weight of at least 15 kg/m2 (3 lb/ft2).
<li>All ''primary'' ''flanged insert drains'' (drains with a stem that inserts into a drain leader)
<ol>
<li>must be manufactured with a hot-welded or seamless flange at least 101.6 mm (4”) wide (measured from the outer edge of the drain opening),
<li>must be hot-welded at the joints between the bowl/flange and drain stem, and
<li>must be installed with a clamping ring.
</li></ol>
<li>''Primary flanged drains'' (insert drains or scuppers) that connect with plumbing inside the building (“internal” drains) must be constructed of
<ol>
<li>copper (min. weight: 24 oz. sheet copper; min. thickness: 20-gauge, or 0.889 mm (0.035”)),
<li>aluminum (min. thickness: 12-gauge, or 2.053 mm (0.08081”)), or
<li>stainless steel, Grade 316L (min. thickness: 18 gauge, or 1.27 mm (0.050”)).
</li></ol>
<li>''Primary flanged drains'' (insert drains or scuppers) that drain directly to the exterior of the building (“external” drains) must be constructed of
<ol>
<li>copper (min. weight: of 16 oz.; min. thickness: 24-gauge, or 0.559 mm (0.022”)), or
<li>aluminum (min. thickness: 20-gauge material, or 0.812 mm (0.03196”)).
</li></ol>
<li>All ''scupper drains'' (open, or closed (boxed)) must be
<ol>
<li>manufactured with welded seams and joints,
<li>designed to extend past the outside face of the wall, and
<li>fabricated from
<ol>
<li>copper (min. weight: 16 oz.; min. thickness: 24-gauge, or 0.559 mm (0.022”)), {{strike| or || 2025-May-29 }}
<li>aluminum (min. thickness: 20-gauge material, or 0.812 mm (0.03196”)), or
<li>stainless steel, Grade 316L (min. thickness: 18 gauge, or 1.27 mm (0.050”)).
</li></ol>
</li></ol>
<li>In addition to the general requirements for ''scupper drains'', closed (boxed) ''scupper drains'' must also be
<ol>
<li>fully enclosed on four sides, for through-wall applications,
<li>fabricated with a drip edge at the bottom outside edge of the ''drain'' to deflect overflow water away from the building, and
<li>fitted with an overflow opening on the outside face of the ''scupper'',
<ol>
<li>equal in capacity to the main ''drain leader'' opening, and
<li>at least 38.1 mm (1 ½”) lower than the top surface of the ''scupper drain''.
</li></ol>
</li></ol>
<li>''Overflow drains''
<ol>
<li>must be manufactured from copper or aluminum conforming to the material requirements in Sentence (9) above, but
<ol>
<li>may be manufactured from ferrous metals (See [[#Section 13.2. Materials |Section 13.2.]]), and
<li>may be manufactured from stainless steel, but the steel shall be Grade 316L stainless steel (min. thickness: 20 gauge, or 0.9525 mm (0.0375”)), and
</li></ol>
<li>must have a hot-welded or seamless flange at least 101.6 mm (4”) wide when measured from the outer edge of the drain opening.
</li></ol>
<li>All ''drains'' utilized in a ''roof assembly'' that includes gravel ballast or growing media (soil) must be supplied with the drain manufacturer's proprietary primary drain strainer and secondary stainless-steel ballast guard, but when one is not provided, a custom-fabricated guard may be used provided the guard
<ol>
<li>is fabricated from 20-gauge stainless-steel (0.9525 mm or 0.0375”),
<li>incorporates 6.35 mm (1/4”) perforations, and
<li>equals or exceeds the height of the ''finished system surface''.
</li></ol>
</li></ol>

====11.2.1.3. Reserved====

====11.2.1.4. Fasteners====

<ol>
<li>Mechanical fasteners used to secure ''scuppers'' and ''overflows'' must be
<ol>
<li>properly sized in accordance with ''waterproofing system'' securement requirements (See [[#Part 3 - Securing the Roof Assembly | Part 3]]), and shall be
<ol>
<li>self-drilling purpose-made screws manufactured with deep, recessed heads.
</li></ol>
</li></ol>
</li></ol>

====11.2.1.5. Sealants====

<ol>
<li>Sealants must be manufactured by, or acceptable to, the ''manufacturer''.
<li>Compression sealants must be formulated to provide waterproofed seals under compressive loads.
</li></ol>

====11.2.1.6. Liquid Membrane Flashing====

<ol>
<li>Only a RoofStar-accepted reinforced two-component catalyzed polymethyl methacrylate (PMMA) liquid membrane flashing system may be used on the water plane to flash ''drains'', ''scuppers'', and ''overflows''.
</ol></li>

==Section 11.3. Application==
===11.3.1. Guarantee Term Requirements===
====11.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====11.3.1.2. Reserved====

===11.3.2. All Systems===
====11.3.2.1. Condition and Suitability of Drains====

<ol>
<li>All clamping rings and strainers must be unbroken, properly seated, and fully secured.
</li></ol>

====11.3.2.2. Location and Spacing of Drains====
(See also [[#Section 11.1. Design | Section 11.1., "Design"]])

<ol>
<li>''Drains'' for new construction ''projects'' must be located at least 457.2 mm (18") away from any adjacent ''drain'', penetration, upstand, edge, or ''wall'' (the separation space is measured between openings, excluding the flange).
<li>The 457.2 mm (18") spacing requirement for ''drains'' does not apply to ''overflows'', ''scupper drains'', and drains used in membrane gutters.
<li>''Drains'' and cap membrane seams must be offset from each other at least 304.8 mm (12”), measured from the edge of the ''drain''.
</li></ol>

====11.3.2.3. Drain Protection Against Blockage====

<ol>
<li>All ''drains'' must be supplied and installed with a secured strainer to prevent debris from blocking the ''drain''.
<li>When a ''waterproofing assembly'' supports ''overburden'' or is secured with ballast, drains must be installed together with a surrounding ballast guard that promotes water flow.
<li>When the ''overburden'' is landscaping, ''drains'' must be protected by both a stone/ballast guard and a ''separation zone'', as required in [https://rpm.rcabc.org/index.php?title=VRA_Standard#5.1.3.3._Separation_of_vegetation_from_roofing_details {{hilite |Article 5.1.3.3.] of the "RGC Standard for Vegetated Roofs".
</ol></li>

====11.3.2.4. General Installation Requirements====

<ol>
<li>''Drains'' must be
<ol>
<li>secured to the ''supporting deck'' structure, or to blocking, and
<li>properly detailed for ''continuity'' with specified ''control layers''.
</ol></li>
<li>''Drains'' must be flashed using the primary membrane system or accessories acceptable to the ''manufacturer'' and the '''''Guarantor'''''.
<li>When fleece-reinforced liquid membrane systems are used to flash drains, only a RoofStar-accepted reinforced two-component catalyzed polymethyl methacrylate (PMMA) may be used on the ''drainage plane'' to flash ''drains'', ''scuppers'', and ''overflows''.
</ol></li>

===11.3.3. Drains===
(The requirements for [[#11.3.2. All Systems | Subsection 11.3.2., "All Systems"]], shall be read together with the following Articles)

====11.3.3.1. Reserved====

====11.3.3.2. General Requirements for Cast Iron Drains====

<ol>
<li>Cast iron ''drains'' must be installed by the plumbing/mechanical trade.
<li>When cast iron ''drains'' are used and the ''deck'' is steel, a sump receiver and under-deck clamp must be provided and installed by the trade supplying the drain.
<li>Drain extensions for cast iron roof drains should be avoided.
<li>Existing flow controls removed during ''project'' construction should be reinstalled; however, if the replacement ''waterproofing assembly'' will support landscaping, the drainage design must conform to the requirements set out by the '' Design Authority''.
<li>''Drains'' shall be connected to internal piping by mechanical compression type seals only; the use of "O"-rings, mastics and caulking, is not acceptable for sealing to internal piping.
<li>All cast iron ''drains'' must be
<ol>
<li>new or clean,
<li>unbroken (this also applies to clamping rings, threaded rod, strainers, and ballast guards), and
<li>flashed in accordance with the ''manufacturer's'' published instructions, or to the requirements published in this Part, whichever are greater.
</li></ol>
<li>The ''continuity'' of air and vapour ''control layers'' must be maintained, where the controls are specified.
</li></ol>

====11.3.3.3. Cast Iron Drains Installed with Lead Flashing====

<ol>
<li>All cast iron ''drains'' installed with lead flashing shall conform to the means and methods described and required in [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#11.3.3.3._Cast-iron_Drains_Installed_with_Lead_Flashing Article 11.3.3.3.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs" (lead flashing is not used with cast-iron drains installed in hot fluid-applied rubberized asphalt membranes).
</li></ol>

====11.3.3.4. Cast Iron Drains Installed with Membrane Flashing====

<ol>
<li>All cast-iron drains installed with membrane flashing shall conform to the means and methods described and required in the applicable RGC Standard for roofs:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#11.3.3.4._Cast-iron_Drains_Installed_with_Membrane_Flashing Article 11.3.3.4.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#11.3.3.4._Cast-iron_Drains_Installed_with_Membrane_Flashing Article 11.3.3.4.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>When the waterproofing membrane is SBS,
<li>the clamping ring must be set in and bolted down to a warm, newly applied membrane, to ensure a good seal, or
<li>the sheet membrane may be sealed to the drain bowl with the application of a 2-component fleece-reinforced PMMA liquid flashing system that overlaps the sheet membrane at least 200 mm (8”) onto the drain flange and into the exposed drain bowl by no less than 50.8 mm (2”).
</li></ol>
</li></ol>

====11.3.3.5. Cast-iron Roof Drain Retrofitting (Replacement Roofing)====

<ol>
<li>Retrofitting a cast iron ''drain'' is not recommended, but when retrofitting is unavoidable (i.e., the ''drain'' has deteriorated to the extent that it cannot receive a new waterproofing membrane, and removal is not possible),
<ol>
<li>remove any broken parts and debris,
<li>clean and prepare all surfaces of the ''drain'' that will receive new waterproofing materials,
<li>seal any cracks in the bowl with a 2-component fleece-reinforced PMMA liquid flashing system, applied to the inside of the drain bowl, ensuring that the flashing system extends at least 50.8 mm (2”) on either side of the crack,
<li>connect the retrofit insert to internal leaders using only an external coupling (unless impractical - see alternative requirements below), and
<li>follow the requirements set out in [[#11.3.3.2. General Requirements for Cast Iron Roof Drains | Article 11.3.3.2.]]
</li></ol>
<li>When an internal compression seal is used out of necessity to connect a retrofit ''drain'' to an existing ''drain leader'',
<ol>
<li>the joint must be properly prepared to ensure the joined surfaces are clean, smooth, and uniform, and
<li>honing out the cast pipe may be required.
</li></ol>
<li>In the absence of a clamping collar, the retrofit insert ''drain'' must be sealed to the primary membrane with another method acceptable to the ''manufacturer'' and the '''''Guarantor''''' (Ref. [[#11.2.1.6. Liquid Membrane Flashing | Article 11.2.1.6.]]).
</li></ol>
</li></ol>

====11.3.3.6. Flanged Insert-type Roof Drains====

<ol>
<li>Flanged insert drains installed with SBS-modified bituminous sheet membranes must conform to the requirements in [https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#11.3.3.6._Flanged_Insert-type_Roof_Drains Article 11.3.3.6.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
</li></ol>

====11.3.3.7. Scuppers and Overflows====

<ol>
<li>When ''scuppers'' and ''overflows'' are used, their installation shall conform to the means and methods described and required in the applicable RGC Standard for roofs:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#11.3.3.7._Scuppers_and_Overflows Article 11.3.3.7.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#11.3.3.7._Scuppers_and_Overflows Article 11.3.3.7.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
</li></ol>

====11.3.3.8. Reserved====

<hr>
<div id=PART_12></div>

=Part 12 - Penetrations and Curbs=
==Section 12.1. Design==
===12.1.1. General===
====12.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====12.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]].
</li></ol>

===12.1.2. Guarantee Term Requirements===
====12.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====12.1.2.2. Reserved====

===12.1.3. All Systems===
====12.1.3.1. General Requirements for Penetrations====

<ol>
<li>The use of curbs conforming to [[#12.1.3.4. Curbs, Sleepers, and Equipment Pads | Article 12.1.3.4.]] is required for mounting for all venting units and equipment.
<li>Where openings or penetrations pass through the ''waterproofing assembly'' (i.e., for mechanical or electrical services), the specification and detail drawings shall
<ol>
<li>provide direction for ''continuity'' of ''control layers'', where these layers intersect with any opening or penetration, and
<li>require a ''curb'' or an acceptable penetration flashing to enclose and seal each opening in the assembly.
</li></ol>
<li>Each penetration (except for clustered or bundled electrical cables) must be flashed separately from others.
<li>Single or bundled electrical cable penetrations must be flashed with a suitable goose-neck flashing, fitted with a weather head.
<li>Penetration flashings must be
<ol>
<li>new,
<li>suitable for the type of penetration,
<li>sized to elevate the open end of the flashing or weather-head at least 203.2 mm (8”) above the ''finished system surface'', and
<li>properly sized and fitted around the penetration to permit a seal (gaps between the penetration and the inside of the flashing shall be no more than 12.7 mm (1/2"), or
<li>of sufficient height to be made water-tight with a site-fabricated membrane seal fashioned to enclose the gap between the flashing and the penetration (see '''Figure 12.3.2.1.-A'''); the application of liquid sealant around the penetration in an open-top flashing is not acceptable.
</li></ol>
<li>Notwithstanding the minimum height requirement for flashings in Sentence (5), when services penetrate the ''waterproofing assembly'' and must be concealed below the ''finished system surface'', the flashing for the penetration shall be no less than 101.6 mm (4”) in height and the penetration shall be sealed to the flashing, but a leak through the penetration or its seal with the flashing is not covered by a '''''RoofStar Guarantee'''''.
<li>Hollow steel penetrations and structures that penetrate the ''waterproofing system'' above a conditioned space should be filled with spray foam and topped with pourable sealant.
<li>Hollow steel penetrations and structures that are manufactured with vent holes (necessary during galvanizing) must be fitted with lead plugs in the holes to prevent water ingress (plugs should be cut flush with the outside face of the penetration).
<li>Penetration flashings
<ol>
<li>that are or may be prone to condensation should be factory-insulated, and
<li>should be selected for their ability to inhibit the intrusion of vermin and insects into the roof assembly and building interior.
</li></ol>
<li>Suitable flashings must be specified for penetrations that are expected to expand, contract, or otherwise move.
<li>Cylindrical ("pipe-type") penetrations must be sealed with
<ol>
<li>the ''manufacturer’s'' proprietary pre-molded flashing that utilize mechanical clamps,
<li>a 2-part site-fabricated or proprietary flashing with a removable inspection/access cap (Ref. Construction Detail [[SBS 2-Part Retrofit Flashing (Cable Penetration) | "2-Part Retrofit Flashing (Cable Penetration)"]]), or
<li>roof ''curbs'' fitted with customized metal hoods or square-to-round metal flashing.
</li></ol>
<li>Aluminum or copper flashings for penetrations may be located at the ''drainage plane'' in any assembly type.
</li></ol>

====12.1.3.2. Galvanized Penetration Flashings====

<ol>
<li>The use of galvanized flashings and vents is not recommended, but when they are specified, they shall be elevated on ''curbs'' no less than 203.2 mm (8") in height above the ''finished system surface''.
</li></ol>

====12.1.3.3. Separation Between Details====

<ol>
<li>Penetrations on new construction ''projects'' must be separated from other penetrations, drains, curbs, walls, or changes in plane so that the space between flashings for these details is at least 304.8 mm (12") (this is measured between openings or the edge of a detail and excludes the flashing flange); the exception to this requirement is customized penetration flashings designed for multiple individual or clustered penetrations.
<li>When the separation between details does not comply with the spacing requirements in this Part, only the alternate application methods described in [[#12.3.2.1. General Requirements for Flashing Penetrations | Article 12.3.2.1.]] of the related waterproofing roof Standard will be permitted by the '''''Guarantor''''':
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#12.3.2.1._General_Requirements_for_Flashing_Penetrations Article 12.3.2.1.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#12.3.2.1._General_Requirements_for_Flashing_Penetrations Article 12.3.2.1.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
<li>Where alternate methods are not available in this Standard, or where the space between penetration flashings and any change in plane (e.g., ''curb'', sleeper, ''parapet'') is less 203.2 mm (8”), a Variance request shall be submitted to the '''''Guarantor''''' by the ''Design Authority'' following the Variance requirements in [[#1.1.3.6. Variances | Article 1.1.3.6.]]
</li></ol>
</li></ol>

====12.1.3.4. Curbs, Sleepers, and Equipment Pads====

<ol>
<li>The design and placement of ''curbs'' and sleepers shall be the responsibility of the ''Design Authority''.
<li>''Curbs'' must be designed so that they can be secured directly to the ''deck'' structure, or to intermediate blocking, and must not be situated on top of the ''waterproofing system''.
<li>All ''curbs'', sleepers, and deck-supported equipment pads must be designed to achieve a minimum height of 203.2 mm (8”), measured from the ''finished system surface'', to permit proper membrane flashing.
<li>Notwithstanding the minimum height requirement membrane flashing, ''curbs'' and sleepers that are completely sealed (enveloped) with membrane, and are free of penetrations through the top face (i.e., equipment isolators) may be less than 203.2 mm (8”) in height, measured from the ''finished system surface'', but shall be
<ol>
<li>no less than 101.6 mm (4") in height, or
<li>no less than 127 mm (5") in height when capped with a ''linear metal flashing''.
</li></ol>
<li>Equipment isolators are not considered part of the ''waterproofing system'' and therefore any leaks caused by or occurring at isolators shall be excluded from coverage under the '''''RoofStar Guarantee'''''.
<li>Equipment ("housekeeping") pads placed on top of the ''finished system surface'' and supporting combined loads
<ol>
<li>less than 90 kg (200 lbs) must be separated from the membrane with a bond-breaking layer (i.e., XPS insulation), and
<li>greater than 90 kg (200 lbs) must conform to the requirements for structural sleepers or equipment pads.
</ol></li>
<li>Reinforced liquid membrane flashing systems may be specified only where
<ol>
<li>sheet membrane applications are not practicable (i.e., complex geometry), or
<li>the top edge of membrane plies must be terminated on a vertical surface and other means of termination are not practicable or even possible.
</li></ol>
<li>''Curbs'' enclosed within or adjacent to landscaping shall be designed with base metal flashings to retain the root barrier and any other system components that must be turned up the vertical surface; base flashings shall be fabricated and installed in keeping with the requirements in [[#Part 13 - Linear Metal Flashing | Part 13]] (See [[#13.1.3.6. Cap Flashing, Counter-flashing, and Reglet Flashing | Articles 13.1.3.6.]], [[#13.2.2.1. Fabrication of Flashing | 13.2.2.1.]], and [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | 13.3.2.3.]]; also see Clause (1)(8) of Article 10.3.2.5., “Installation of Root Barrier”, in the [https://rpm.rcabc.org/index.php?title=VRA_Standard#10.3.2.5._Installation_of_Root_Barrier "RGC Standard for Vegetated Roofs"]).
</li></ol>

====12.1.3.5. Protection of Waterproofing Membranes====

<ol>
<li>The ''Design Authority'' must consider and specify mitigating strategies to preserve the waterproofing membrane from damage (i.e., specifying grease guards or a reinforced 2-part liquid membrane coating) when mechanical equipment extracts and discharges grease, chemicals, or other contaminants, onto the roof.
</li></ol>

====12.1.3.6. Railings, Ladders, and Other Attached Structures====

<ol>
<li>Railings, ladders, and other attached structures shall not be affixed at the field membrane level and must be designed for attachment to vertical surfaces only so that fasteners are elevated above the ''finished system surface'' at least 88.9 mm (3-1/2”).
<li>Ladders, railings, or other structures that may penetrate the ''waterproofing system'', should be designed to minimize thermal bridging (and consequential condensation) or reduced thermal performance; uninsulated direct, rigid connections to the structural ''deck'' or ''walls'' is strongly discouraged.
</li></ol>

==Section 12.2. Materials==
(See [[Division_C | Division C, "Accepted Materials"]])

===12.2.1. Material Properties===
====12.2.1.1. Membranes Used for Flashing====

<ol>
<li>Sheet membranes used to flash (strip in) penetrations and ''curbs'' shall be
<ol>
<li>the same membrane used on the system field, or
<li>sheet or liquid membranes conforming to [[#10.2.1.1. Flashing Membranes | Article 10.2.1.1.]]
</li></ol>
</li></ol>

====12.2.1.2. General Requirements for Penetration Flashings====

<ol>
<li>All penetration flashings, except flashings that are proprietary to the ''manufacturer'' {{hilite | and flashings that are installed or supplied by others as part of a Code-compliant, certified chimney assembly (i.e., for solid fuel heating appliances) || 2023-October-28 }}, must be
<ol>
<li>sized to elevate the open end of the flashing or weather-head at least 203.2 mm (8”) above the ''finished system surface'',
<li>accepted by or acceptable to the '''''Guarantor''''',
<li>manufactured to conform to CSA-B272, "Prefabricated Self-Sealing Roof Vent Flashings" (a penetration flashing fabricated by the ''Contractor'' is exempt from this requirement),
<li>permanently marked with the standard number it conforms to, which shall be independently validated through published testing by a qualified third-party,
<li>manufactured from sheet metal conforming to the material requirements in [[#Section 13.2. Materials | Section 13.2.]], when the flashing is custom-made or fabricated by the ''Contractor'',
<li>compatible with the ''waterproofing system'',
<li>seamless or, in the alternative, fabricated with fully hot-welded joints, including a base flange at least 101.6 mm (4”) wide,
<li>capable of inhibiting the intrusion of vermin and insects into the ''roof assembly'' and building interior, and
<li>at least 203.2 mm (8”) tall when measured from the ''finished system surface'' to an opening, or to the top of the flashing.
</li></ol>
<li>Metal penetration flashings that are purpose-made for
<ol>
<li>electrical cables must be goose-necked and supplied with a downward-facing weather head that incorporates proprietary rubber-based friction seals, and
<li>plumbing vents shall be supplied with a matching settlement cap produced by the same manufacturer.
</li></ol>
<li>Galvanized penetration flashings, and galvanized vents, must
<ol>
<li>meet or exceed the CSA-A93 Standard,
<li>be made with material galvanized steel (26-gauge or heavier) conforming to the metal requirements found in [[#Part 13 - Linear Metal Flashing | Part 13, "Linear Metal Flashing"]], and
<li>be at least 203.2 mm (8”) tall when measured from the ''finished system surface'' to an opening.
</li></ol>
<li>In addition to the requirements in Sentence (1), stainless-steel penetration flashings specified for corrosive environments should be made of Grade 304 stainless steel conforming to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”, but when the penetration flashings may be subjected to regular or constant exposure to or immersion in water (especially in a coastal environment), or to corrosive environments, the stainless steel shall be Grade 316L (conforming to the same ASTM standard) (See [[Notes to GLW Standard#A-13.2.1.2.(3)(2)| Note A-13.2.1.2.(3)(2)]]).
<li>Storm collars
<ol>
<li>must be fashioned from galvanized or stainless steel,
<li>must slope downward from the penetration approximately 45°,
<li>shall be at least 50.8 mm (2”) wide,
<li>shall be self-locking or, in the alternative, manufactured to receive a mechanical band clamp, and
<li>should be fabricated with a channel at the top edge, for retaining sealant.
</li></ol>
<li>EPDM used to form a seal between a penetration and its flashing (Ref. [[#12.3.2.1. General Requirements for Flashing Penetrations | Article 12.3.2.1.(12)]]) shall be semi-cured and possess a nominal thickness of no less than 60 mils.
<li>Unshielded flexible mechanical couplings used to join a flashing and a pipe penetration shall be
<ol>
<li>certified to meet ASTM C564 or ASTM D5926,
<li>certified to meet ASTM C1173 and CSA-B602,
<li>supplied with top and bottom proprietary screw-type stainless steel mechanical clamps,
<li>leak-proof, resistant to chemicals, UV-stable, and
<li>suitable for the penetration and flashing they join together.
</li></ol>
</li></ol>

====12.2.1.3. Flashings for Heating and Plumbing System Penetrations====

<ol>
<li>All plumbing vent flashings shall be non-ferrous.
<li>Lead plumbing vent flashings are not permitted.
<li>In addition to the general requirements in [[#12.2.1.2. General Requirements for Penetration Flashings | Article 12.2.1.2.]], all metal penetration flashings (except natural airflow vents) used for heating and plumbing penetrations must be
<ol>
<li>properly sized for the penetration, both in diameter and height, and
<li>supplied with a properly sized galvanized storm collar or settlement cap.
</li></ol>
</li></ol>

====12.2.1.4. Liquid Membrane Flashing====

<ol>
<li>Polymethyl methacrylate (PMMA) and polyurethane methyl methacrylate (PUMA) liquid membrane flashing systems must be
<ol>
<li> catalyzed 2-component systems,
<li>fleece-reinforced with the manufacturer's proprietary polyester fleece, and
<li>accepted listed in [[Division C | Division C]] of this ''Manual''.
</li></ol>
<li>Single-component polyurethane and silicon-based liquid membrane flashing system must be listed in [[Division C | Division C]].
<li>Accessory PMMA detailing products
<ol>
<li>must be listed in [[Division C | Division C]], and
<li>must be reinforced with chopped or loose reinforcement fibres supplied by the ''manufacturer''.
</li></ol>
</li></ol>

==Section 12.3. Application==
===12.3.1. Guarantee Term Requirements===
====12.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====12.3.1.2. Reserved====

===12.3.2. All Systems===
====12.3.2.1. General Requirements for Flashing Penetrations====

<ol>
<li>All penetration flashing materials must be new.
<li>Anything that penetrates through the ''waterproofing assembly'', including openings in ''walls'' and for ventilation, must be
<ol>
<li>sealed to each ''control layer'' that it passes through or intersects, and
<li>flashed with
<ol>
<li>a flashing proprietary to and supplied by the membrane ''manufacturer'',
<li>a ''curb'',
<li>a purpose-made flashing, or
<li>a custom-fitted flashing{{strike| , all of which shall be sealed to the ''roof system'' so that the penetration or opening is protected from water ingress, to at least 203.2 mm (8") above the ''finished system surface''|| 2025-October-22 }}.
</li></ol>
</li></ol>
<li>Except for flashings that are proprietary to and supplied by the membrane ''manufacturer'', all flashings for penetrations in the system field shall be sealed to the ''waterproofing system'' so that the penetration or opening is protected from water ingress, to at least 203.2 mm (8") above the ''finished system surface''.
<li>Each penetration must have its own flashing (except where a purpose-made flashing is designed for multiple penetrations), and each flashing
<ol>
<li>must be suitable for the slope and penetration,
<li>shall be fitted with a cap, hood, weather-head, or closure fitting,
<li>shall not be left open to the weather, insects, or vermin, and
<li>must be properly sized and fitted around the penetration to permit a seal.
</li></ol>
<li>Except for storm collars, or where sealant pockets are permitted ([[#12.3.2.8. Sealant Pockets |Article 12.3.2.8.]]), the use of sealants to make a penetration watertight where it exits a flashing is not acceptable.
<li>Pipe penetrations in the roof field (e.g., plumbing vents)
<ol>
<li>must be at least 203.2 mm (8”) high, when measured from the ''finished system surface'',
<li>must be flashed with a spun flanged flashing at least 203.2 mm (8”) high, when measured from the ''finished system surface'',
<li>shall match the height of the flashing opening (pipes that are too short must be extended in a watertight manner), and
<li>shall be enclosed at the opening with a cap, supplied by the flashing manufacturer, that fits inside the pipe penetration and snugly fits around the outside of the flashing tube (caps should not be mechanically fastened to the flashing).
</li></ol>
<li>Hollow steel penetrations and structures with vent holes from the galvanizing process (e.g., ladders that are anchored to the ''project'' ''deck'' and penetrate the ''waterproofing system'') must be plugged with lead to prevent leaks.
<li>Non-ferrous penetration flashings and vents that conform to the material requirements in [[#Section 12.2. Materials | Section 12.2.]] may be located at the ''drainage plane'' in any assembly type.
<li>Lead penetration flashings are not permitted.
<li>All penetration flashings must be clean, dry, absolutely free of contaminants, have an exterior finish that is suitable to receive sheet or liquid membrane flashing, and must be prepared in keeping with any surface preparation requirements published by the membrane ''manufacturer''.
<li>Cable and horizontal pipe penetrations must be flashed with
<ol>
<li>a purpose-made flashing (i.e., a goose-neck flashing fitted with a weather head),
<li>a sheet membrane-flashed curb fitted with a customized sheet metal hood (shaped to function like a weather head), or
<li>a 2-component fleece-reinforced liquid membrane flashing as described in [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6.]] (when other methods are not possible or practicable).
</ol></li>
<li>Cables and piping (tubing) passing through a penetration flashing should be drooped (when possible), or fitted with a capillary-breaking collar and sealed at any openings, to prevent water from tracking along the cable or pipe, or to prevent wind-driven rain from entering the flashing, into the building; water that enters a building in this way bypasses the ''waterproofing system'' and does not constitute a leak and is therefore excluded from coverage under the '''''RoofStar Guarantee''''' (See '''Figure 12.3.2.1.A''' and '''12.3.2.1.-B''').
 
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 12.3.2.1.-A Flexible penetration showing drip loop and sealant''' Forming Part of Sentence 12.3.2.1.(13) (Click to expand illustration)
|-
| [[File:Part 12 - Illustration - Figure 12.3.2.1.-A.png|link=https://rpm.rcabc.org/images/6/6d/Part_12_-_Illustration_-_Figure_12.3.2.1.-A.png | 600 px]]
|}
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 12.3.2.1.-B Piping (tubing) penetrations through curb and metal hood flashing''' Forming Part of Sentence 12.3.2.1.(13) (Click to expand illustration)
|-
| [[File:Part 12 - Illustration - Figure 12.3.2.1.-B.png|link=https://rpm.rcabc.org/images/a/af/Part_12_-_Illustration_-_Figure_12.3.2.1.-B.png | 600 px]]
|}

<li>Penetration flashings must be sealed into the ''waterproofing system'' following the means and methods described and required in the applicable RGC Standard for roofs:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#12.3.2.1._General_Requirements_for_Flashing_Penetrations Article 12.3.2.1.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#12.3.2.1._General_Requirements_for_Flashing_Penetrations Article 12.3.2.1.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</ol></li>
</ol></li>

====12.3.2.2. Galvanized Penetration Flashings====

<ol>
<li>Galvanized, hot-welded flashings and vents may be installed on ''uninsulated systems'' or in a ''protected waterproofing system'', provided they are installed on ''curbs'' no less than 203.2 mm (8") in height above the ''finished system surface'' (Ref. [[#11.1.3.2. Roof Drain Function and Location | Article 12.1.3.2.]]) and are sealed to the ''curbs'' with sheet membrane.
</ol></li>

====12.3.2.3. Separation Between Penetration Flashings====

<ol>
<li>Penetrations on new construction ''projects'' must be separated from
<ol>
<li>other penetrations, ''curbs'', ''walls'', or changes in plane so that the space between flashings for these details is at least 304.8 mm (12") (this is measured between openings or the edge of a detail and excludes the flashing flange), and
<li>''roof drains'' at least 457.20 (18") (Also see [[#11.1.3.2. Roof Drain Function and Location | Article 11.1.3.2.]]).
</li></ol>
<li>When the separation between penetration flashings does not conform to the minimum spacing requirements, the application options described in [[#12.3.2.1. General Requirements for Flashing Penetrations | Article 12.3.2.1.]] of the applicable RGC Standard for roofs must be followed.
</li></ol>

====12.3.2.4. Curbs, Sleepers, and Equipment Pads====

<ol>
<li>Curbs shall be waterproofed following the means and methods described and required in the applicable RGC Standard for roofs:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#12.3.2.4._Curbs.2C_Sleepers.2C_and_Equipment_Pads Article 12.3.2.4.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#12.3.2.4._Curbs.2C_Sleepers.2C_and_Equipment_Pads Article 12.3.2.4.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</ol></li>
</ol></li>

====12.3.2.5. Alternative Approaches to Membrane Flashing====

<ol>
<li>The ''Contractor'' must assess the best approach to waterproofing any detail, when site conditions or construction sequencing require alternatives to heat-welding.
<li>When alternative methods are required,
<ol>
<li>curbs must be flashed by adapting the methods described in [[SBS_Roof_Systems_Standard#10.3.8.2. Pre-flashing | Article 10.3.8.2.]] of the "Standard for SBS-modified Bitumen Membrane Roof Systems", or by using other approaches that are equal or superior, and
<li>penetrations must be
<ol>
<li>incorporated into an adhered or self-adhered field membrane system, or
<li>flashed by using a pre-flashing method that is suitable for the penetration.
</li></ol>
</li></ol>
</li></ol>

====12.3.2.6. Liquid Membrane Flashing====
(See '''Figures 12.3.2.6.-A''' and '''12.3.2.6.-B''')

<ol>
<li>Any liquid flashing system shall
<ol>
<li>conform to the material requirements in [[#12.2.1.4. Liquid Membrane Flashing | Article 12.2.1.4.]],
<li>be compatible with the substrate to which it is applied,
<li>be applied to a properly prepared substrate, which must be clean, dry, free of contaminants, and primed, as required by the manufacturer in their published instructions,
<li>be applied within masked boundaries to produce clean, straight, plumb edges (accessory products may be exempt from this requirement only when masking is impracticable),
<li>be used only when permitted by the ''manufacturer'', and
<li>be applied in keeping with the requirements and limitations of this Article.
</ol></li>
<li>Liquid membrane flashing systems may not be used on plastic substrates.
<li>When liquid membrane flashing systems are required or specified, only two--component fleece-reinforced catalyzed polymethyl methacrylate (PMMA) and polyurethane methyl methacrylate (PUMA) liquid membrane flashing systems may be used
<ol>
<li>on the ''drainage plane'',
<li>where sheet membrane flashing may not be practical or even possible,
<li>to terminate the top edge of sheet membrane flashing,
<li>where resistance to contamination of sheet membrane is necessary,
<li>where abrasion resistance is required, or
<li>for sheet membrane reinforcement (i.e., at corners).
</ol></li>
<li>Two-component fleece-reinforced catalyzed polymethyl methacrylate (PMMA) and polyurethane methyl methacrylate (PUMA) liquid membrane flashing systems
<ol>
<li>may be used
<ol>
<li>where abrasion resistance is desirable, or
<li>where the ''Design Authority'' specifies its application.
</ol></li>
<li>shall be applied to ensure that
<ol>
<li>the rate of application conforms to the ''manufacturer's'' published instructions, unless superseded by this Standard,
<li>the base coating of catalyzed liquid membrane resin evenly and fully covers the masked area,
<li>the manufacturer’s reinforcement fleece is cut to cover the masked area, to within 4.76 mm (1/8”) of all edges,
<li>the fleece is fully embedded in, and saturated with, the based coating of resin, and
<li>the fleece is evenly and thoroughly coated with a second application of catalyzed liquid membrane resin, covering the masked area.
</ol></li>
</ol></li>
<li>Where a fleece-reinforced 2-component catalyzed polymethyl methacrylate (PMMA) liquid membrane flashing system is used to terminate sheet membrane on the vertical plane, the liquid membrane flashing system must overlap the sheet membrane, and it must extend onto the vertical substrate above the sheet membrane, by no less than 50.8 mm (2") ('''Figure 12.3.2.-B''').
<li>Fleece-reinforced 2-component catalyzed polymethyl methacrylate (PMMA) liquid membrane flashing system that is used as a substitute for sheet membrane flashing must be carried up a vertical plane above the ''finished system surface'' at least 203.2 mm (8”), and no less than 203.2 mm (8") onto the horizontal field plane (See '''Figure 12.3.2.6.-A'''| and '''Figure 12.3.2.6.-B''').
<li>Single-component polyurethane and silicon-based liquid membrane flashing ''system''
<ol>
<li>may be used
<ol>
<li>to coat galvanized flashings used in the water plane, provided the application follows the requirements in [[#12.3.2.2. Galvanized Penetration Flashings | Article 12.3.2.2., "Galvanized Penetration Flashings"]],
<li>to flash details more than 101.6 mm (4”) above the water plane, that cannot be sealed with sheet-type membranes, or
<li>to seal pre-curb dowels (see [[#14.3.2.7. Structures and Equipment | Article 14.3.2.7.]]).
</ol></li>
<li> must not be used in the ''drainage plane'', or to reinforce membranes against abrasion,
<li>must be applied in two cured coats, unless otherwise permitted in this Standard, and
<li>must be fleece-reinforced between coats where
<ol>
<li>the application is considered permanent,
<li>a change in plane (angle) occurs, or
<li>there is a joint between two supports and the liquid membrane must serve as a bridge.
</ol></li>
</ol></li>
<li>Accessory PMMA detailing products
<ol>
<li>shall not be used as a substitute for fleece-reinforced 2-component PMMA systems, where these are required or exclusively permitted,
<li>must be used at locations 101.6 mm (4”) or more above the ''finished system surface'', except where complex details, such as bolt heads, cannot be properly sealed with a fleece-reinforced 2-component PMMA system, and
<li> must not be used where movement is expected.
</ol></li>
</ol></li>
 
::{|
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 12.3.2.6.-A Application Requirements for PMMA on Roof Penetration''' Forming Part of Sentence 12.3.2.6.(4) (Click to expand illustration)
|-
| [[File:Figure 12.3.-B (Generic).jpg |link=https://rpm.rcabc.org/images/7/75/Figure_12.3.-B_%28Generic%29.jpg | 500 px]]
|}
 
::{|
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 12.3.2.6.-B Illustration of Various Liquid Membrane Flashing Applications''' {{hilite | Forming Part of Article 12.3.2.6. (Click to expand illustration)
|-
| [[File:Part 12 - Figure 12.3.2.6.-B.png|link=https://rpm.rcabc.org/images/9/92/Part_12_-_Figure_12.3.2.6.-B.png | 800 px]]
|}

====12.3.2.7. Railings, Ladders, and Other Attached Structures====
(See also Construction Detail [[SBS Railing | "Railing"]])

<ol>
<li>Fasteners installed to secure railings, ladders, and other structures to the vertical face of ''walls'' must be located at least 88.9 mm (3-1/2") above the ''finished system surface''.
<li>Railings, ladders, and other structures mounted on a waterproofed horizontal substrate that is part of the ''waterproofing assembly'' (i.e., on top of a ''parapet'') shall be fully flashed around each base with a fleece-reinforced liquid membrane flashing material, unless directed otherwise by a written Variance issued by the '''''Guarantor''''', using a product that is
<ol>
<li>suitable for use in the ''drainage plane'',
<li>applied in keeping with the requirements in [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6.]], and
<li>compatible with roofing membranes installed on the substrate.
</li></ol>
<li>Railings, ladders, and other structures shall not direct water into the building by means of weep holes or the method of fastening.
</li></ol>

<hr>
<div id=PART_13></div>

=Part 13 - Linear Metal Flashing=
==Section 13.1. Design==
===13.1.1. General===
====13.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====13.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Cleat'', also referred to as a "wind clip", is a long piece of sheet metal that is fastened to a solid substrate (usually structural) behind a ''linear metal flashing'', to hold it in place.
<li>''Drip edge'' means the bent (kicked-out) hemmed edge of a linear metal flashing, measuring at least 19.05 mm (3/4") and angled no more than 30° from vertical ("Architectural Sheet Metal Manual" published by the Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA), Sixth Ed.: p. 2.3); it is used to direct dripping water away from the face of the metal flashing or the materials it is protecting, such as a wall. A drip edge may be fabricated on any linear metal flashing but is commonly used on coping (parapet cap) and counterflashing (also see the Glossary for a colloquial use of the term).
<li>''Hemmed edge'' means an edge of a ''linear metal flashing'' that is folded onto itself (bent 180°), to render a smooth (not raw or sharp) finish (this is sometimes referred to as a "safety edge").
<li>''Linear metal flashing'' means flashings cut and shaped from flat metal stock, to redirect water at ''waterproofing system'' perimeters and edges, or to control the flow of water in valleys and drainage spillways. ''Linear metal flashings'' also protect waterproofing membranes from weathering and damage and provide an aesthetic finish to the ''waterproofing system''.
</li></ol>
</li></ol>

===13.1.2. Guarantee Term Requirements===
====13.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====13.1.2.2. Reserved====

===13.1.3. All Systems===
====13.1.3.1. Scope and Function====
(See also the "Architectural Sheet Metal Manual" published by the Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA))

<ol>
<li>''Linear metal flashings'' described in this Part and referenced elsewhere in this Standard
<ol>
<li>are considered necessary and integral to the scope of a ''project'' designed and constructed to qualify for a '''''RoofStar Guarantee''''',
<li>do not perform a waterproofing function and therefore must be specified for use over membrane flashing, or designed to shed water onto a waterproofing or water-shedding primary material,
<li>shall be new (reuse of any existing ''linear metal flashings'' is prohibited and may void the '''''Guarantee''''' (See [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2., "Limitations and Exclusions of Guarantee"]]), and
<li>shall be ''Contractor''-fabricated to suit the ''project'' requirements or shall be listed in [[Division_C | Division C]] as materials pre-engineered and manufactured by a metal supplier.
</li></ol>
<li>The requirements in this Part apply almost entirely to ''Contractor''-fabricated linear metal flashings; consequently, RoofStar-accepted pre-engineered products accepted as systems are exempt from the requirements in this Part for metal gauge, profile, and securement, unless expressly stated otherwise.
<li>''Linear metal flashings''
<ol>
<li>must be specified when UV-sensitive membranes require protection, or when membrane edges will otherwise be exposed to the sun, to water, or to physical damage, and
<li>may be specified to cover ''parapet'' caps, sleepers, or curbs
<ol>
<li>for aesthetic reasons, or
<li>to protect the membrane from damage resulting from maintenance (i.e., pressure washing of decks or pavers), or from foot traffic.
</li></ol>
</li></ol>
</li></ol>

====13.1.3.2. Information Required in Specifications====

<ol>
<li>{{hilite | Subject to the requirements in this Standard,|| 2021-February-7 }} the ''Design Authority'' must specify
<ol>
<li>metal type, finish, and gauge,
<li>seam types,
<li>length of flashings (if different from the requirements in this Part), and
<li>method of attachment (concealed or exposed fasteners).
</li></ol>
<li>Design drawings must detail metal flashing profiles desired for the ''project''.
</li></ol>

====13.1.3.3. Securement====

<ol>
<li>Securement of all ''linear metal flashings'' shall be specified in keeping with the application requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]
</li></ol>

====13.1.3.4. Gauge, Dimension Limitations, and Seams====

<ol>
<li>Gauge, dimensions, slope, and length of ''linear metal flashings'' must be specified to conform to the requirements in '''Table 13.1.3.4.-A''' and [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]], but shall not be less than 26-Gauge.
<li>Specified seam types shall conform to the requirements in '''Table 13.1.3.4.-B''' and [[#13.3.2.2. Seams | Article 13.3.2.2.]]
</li></ol>
 
::::::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Table 13.1.3.4.-A. Pre-finished Galvanized Steel Cap (Coping) Flashing (Gauge and Length Requirements)''' Forming Part of Sentence 13.1.3.4.(1).
|-
|}
:{| class="wikitable" style="text-align: left; margin-left: 20pt; margin-right: auto; border: none;"
|-
! Horizontal Span !! Minimum Slope !! Gauge !! Maximum Flashing Segment Length !! Seam Options
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | Up to 304.8 mm (12") || rowspan="2" style="vertical-align:centre;text-align:center;" | 2% || 26, 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | ≤ 3048 mm (120")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 304.8 - 914.4 mm (12" to 36") || rowspan="2" style="vertical-align:centre;text-align:center;" | 4% || 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | ≤ 3048 mm (120")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 914.4 mm (36") or greater || rowspan="2" style="vertical-align:centre;text-align:center;" | 6% || 24 || rowspan="2" style="vertical-align:centre;text-align:center;" | ≤ 1219.2 mm (48")|| S-lock or Standing Seam
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | Up to 304.8 mm (12") || rowspan="2" style="vertical-align:centre;text-align:center;" | 2% || 24 || rowspan="6" style="vertical-align:centre;text-align:center;" |3048 mm (12"), as specified by a ''registered professional'' || S-lock or Standing Seam†
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 304.8 - 914.4 mm (12" to 36") || rowspan="2" style="vertical-align:centre;text-align:center;" | 4% || 24 || S-lock or Standing Seam†
|-
| 22+ || Butt Seams*
|-
| rowspan="2" style="vertical-align:centre;text-align:center;" | 914.4 mm (36") or greater || rowspan="2" style="vertical-align:centre;text-align:center;" | 6% || 24 || S-lock or Standing Seam†
|-
| 22+ || Butt Seams*
|}
::''*'' Ref. [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]
::† Seam type shall be determined by the ''registered professional'' but when the flashing exceeds 3048 mm (120”) in length and linear expansion or contraction will be greater than 6.35 mm (¼”), only S-locks or Butt Seams shall be used.

::::::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Table 13.1.3.4.-B. Pre-finished Galvanized Steel Vertical Flashing (Gauge and Length Requirements)''' Forming Part of Sentence 13.1.3.4.(2).
|-
|}

:::::{| class="wikitable" style="margin-left: 0pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:center;"
|-
! Vertical Face !! Gauge!! Maximum Flashing Segment Length !! Vertical Seam Options
|-
| Up to 152.4 mm (6") || 26 || ≤ 3048 mm (120") || S-lock
|-
| Up to 203.2 mm (8") || 24 || ≤ 3048 mm (120") || S-lock
|-
| Up to 304.8 mm (12") || 22+ || ≤ 3048 mm (120") || Butt Seams*
|-
| Up to 152.4 mm (6") || 24 || rowspan="3" style="vertical-align:centre;text-align:center;" | >3048 mm (120”), as specified by a ''registered professional'' || S-lock*†
|-
| Up to 203.2 mm (8") || 24 || S-lock*†
|-
| Up to 304.8 mm (12") || 22+ || S-lock or Butt Seams*†
|-
|}
::''*'' Ref. [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]
::† Seam type shall be determined by the ''registered professional'', but when the flashing exceeds 3048 mm (120”) in length and linear expansion or contraction will be greater than 6.35 mm (¼”), only S-locks or Butt Seams shall be used.

====13.1.3.5. Fit and Finish====

<ol>
<li>Fit and finish of all ''linear metal flashings'' shall conform to the requirements in [[#13.2.2. Fabrication and Finish | Subsection 13.2.2.]]
<li>''Drip edges'' are not required but are strongly recommended for ''linear metal flashings'' installed around the outside perimeter of a building, to protect ''wall'' finishes (Ref. [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1.]] for fabrication requirements).
<li>Stainless steel flashings and fasteners are recommended for use in environments where significant corrosion may occur (e.g., near salt-water coastlines) (See [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]] for stainless steel material requirements).
</li></ol>

====13.1.3.6. Cap Flashing, Counterflashing, and Reglet Flashing====

<ol>
<li>Cap (coping) flashings
<ol>
<li>are required for all ''parapets'' (including ''parapets'' on ''waterproofing assemblies'' that are adjacent to each other),
<li>are optional for ''control joints'' (area dividers) that are fully enveloped with waterproofing membrane (Ref. [[#10.3.6.2. Control Joints (Roof Dividers) | Article 10.3.6.2.]]), and
<li>are recommended on ''control joints'' (area dividers) where the membrane may be susceptible to abrasion or mechanical damage.
</li></ol>
<li>All linear metal cap (coping) flashing specified for ''parapets'' shall indicate securement to a solid substrate
<ol>
<li>at every seam, using S-locks or standing seam clips (Ref. [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]),
<li>beneath the outside vertical face of the flashing, using hidden clips (Ref. [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3.]]), and
<li>on the waterproofing side (inside) face of the flashing.
</li></ol>
<li>The use of exposed fasteners on the exterior face of cap (coping) flashing specified for ''parapets'' is not permissible.
<li>When the top surface of a ''wall'' exceeds 101.6 mm (4") in width, linear metal coping (cap) flashing must be specified with a minimum slope of 2% toward the waterproofing side of the ''parapet'', to promote drainage (drainage toward the exterior of a building is not recommended).
<li>All metal cap (coping) flashing must be designed with full, solid support.
<li>When the specified cap flashing material is thicker or heavier than 18-gauge steel or aluminum, or it exceeds the permissible weight or gauge ranges for copper or zinc flashings, the seam and securement design must be submitted to the '''''Guarantor''''' for review prior to tender (See [[#13.3.2.2. Seams | Article 13.3.2.2.]] concerning flat butt seams).
<li>Base metal flashings used to conceal wall materials or to restrain filtration materials and drainage boards must be fashioned to conform to [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1.]] and [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3.]]
</li></ol>

====13.1.3.7. Intersections with Other Assemblies====

<ol>
<li>Where a ''parapet'' intersects with a ''wall'', the union must be designed to direct water to the ''waterproofing system'', away from the outer surface of the ''wall'', using a metal saddle assembly in combination with the membrane requirements in [[#10.3.4.1. Parapets | Article 10.3.4.1.]] (Ref. [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3.]]).
</ol></li>

==Section 13.2. Materials==
(Ref. [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]] concerning limitations and exclusions for metal flashing.)

===13.2.1. Material Properties===
====13.2.1.1. Manufacturing and Supply====

<ol>
<li>''Linear metal flashings'' must be new, manufactured and supplied by the ''Contractor'' or by an Associate Member of the RCABC, and must conform to the requirements published in this Part.
</ol></li>

====13.2.1.2. Sheet Metal Grade and Gauge====

<ol>
<li>A mill certificate must be provided by the ''Contractor'' when requested by the ''Design Authority''.
<li>When stainless-steel metal flashings are specified, grade 304 stainless steel conforming to the requirements in Clause (3)(2) may be used in most applications but when flashings will be subject to regular or constant immersion in water (especially in a coastal environment), or to corrosive environments, the flashings should be manufactured from Grade 316L stainless steel conforming to the requirements below.
<li>The following minimum gauges and/or weights of sheet steel materials apply to all ''linear metal flashings'' (the reference standard for gauges is USS REV (metric in mm)):
<ol>
<li>'''Galvanized steel''': minimum 0.50 mm (0.0196", 26-gauge) galvanized steel sheet, conforming to ASTM A653 / A653M-06 CS Type B, Z275 (G90) coating. Thickness tolerance as per ASTM A924/A924M-06 ±0.08 mm (0.003") for sheet widths not exceeding 1524 mm (60").
<li>'''Stainless Steel Grade 304''': minimum 0.38 mm (0.014", 28-gauge) stainless steel, Grade 304, conforming to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”. Maximum thickness tolerance variation ± 0.04 mm (0.0015") based on 1219.2 mm (48") wide sheet (See [[Notes to GLW Standard#A-13.2.1.2.(3)(2) | Note A-13.2.1.2.(3)(2)]]).
<li>'''Stainless Steel Grade 316L''': minimum 0.38 mm (0.014", 28-gauge) stainless steel, conforming to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”.
<li>'''Aluminum-Zinc alloy-coated steel''': minimum 0.50 mm (0.0196", 26-gauge) aluminum-zinc alloy coated steel sheet, conforming to ASTM A792/A792M-06 CS Type B, AZM150 (AZ50) coating. Thickness tolerance as per ASTM A924/A924M-06 ±0.08 mm (0.003") for sheet widths not exceeding 1524 mm (60").
</li></ol>
<li>The following minimum gauges and/or weights of non-ferrous materials apply to all ''linear metal flashings'':
<ol>
<li>'''Aluminum''': minimum 0.80 mm (0.032", 20-gauge) aluminum sheet, utility quality to CSA HA Series - 1975, plain or embossed finish. Maximum thickness tolerance variation ± 0.06 mm (0.0025") based on 1219.2 mm (48") wide sheet.
<li>'''Copper''': minimum 0.56 mm (24-gauge; 0.0216", 16 oz.) copper sheet, cold rolled roofing copper to ASTM B370-81. Maximum thickness tolerance variation ± 0.09 mm (0.0035") based on 1219.2 mm (48") wide sheet.
<li>'''Zinc''': minimum 0.80 mm (0.031") zinc Sheet conforming to European standard EN 988-1996. Maximum thickness tolerance variation ± 0.03 mm (0.0012").
</li></ol>
<li>Where a ''waterproofing system'' adjoins and "Architectural Sheet Metal System", ''linear metal flashings'' must be fabricated from 24-gauge steel stock.
</li></ol>

====13.2.1.3. Fasteners====

<ol>
<li>Fasteners must be
<ol>
<li>threaded screws, friction-type pins (i.e., for masonry or concrete), plug (inserts), or rivets (where permitted),
<li>compatible with materials they contact,
<li>corrosion-resistant,
<li>specified by the ''Design Authority'', and
<li>appropriately sized, in both length and thread type, for the material to which they will be secured.
</li></ol>
<li>Nails are not acceptable as fasteners.
<li>Notwithstanding the requirements in Sentence (1), threaded fasteners used to secure linear metal flashings
<ol>
<li>in concealed locations must be at least No. 8, corrosion-resistant screw or expansion fastener with a low-profile head and must be compatible with both the metal flashing material and the substrate.
<li>in exposed locations must be at least No. 10., shall be gasketed (cladding screws), and must match the colour of the materials they fasten.
</li></ol>
<li>When pre-engineered ''linear metal flashing systems'' are specified, fasteners provided by the manufacturer must be used.
<li>Rivets shall be closed-end, dome-head type, and shall be used only for fastening together linear metal flashings.
</li></ol>

====13.2.1.4. Sealants====

<ol>
<li>Sealants shall be
<ol>
<li>non-hardening high-quality butyl or polyurethane,
<li>available in either gun grade or sealant tape form,
<li>suitable for exterior use and able to resist the effects of weathering, and
<li>compatible with, and able to adhere to, the materials to which they are applied.
</ol></li>
<li>Sealants shall conform to
<ol>
<li>CGSB 19-GP-5M, “Sealing Compound, One Component, Acrylic Base, Solvent Curing”,
<li>CAN / CGSB-19.13, “Sealing Compound, One Component, Elastomeric, Chemical Curing”,
<li>CGSB 19-GP-14M, “Sealing Compound, One Component, Butyl-Polyisobutylene Polymer Base, Solvent Curing”, or
<li>CAN / CGSB-19.24, “Multi-Component, Chemical Curing Sealing Compound”.
</ol></li>
</ol></li>

===13.2.2. Fabrication and Finish===
====13.2.2.1. Fabrication of Flashing====

<ol>
<li>Linear metal flashings must be new, must conform to the requirements published in this Part, and shall be manufactured and supplied
<ol>
<li>by the ''Contractor'',
<li>for the ''Contractor'' by another ''Contractor'' (RCABC Member), or
<li>by an ''Associate Member'' of the RCABC.
</ol></li>
<li>Unless expressly accepted by the '''''Guarantor''''', all linear metal flashing fabricated by the ''Contractor'' shall conform to the requirements in this Part.
{{strike| Specified drip edges must be broken (bent) outward from the face of the flashing by at least 30° and shall measure at least 19.05 mm (3/4”), extending from the break. || 2025-October-22 }}
<li>All ''linear metal flashing'', except those that are pre-engineered and expressly accepted by the RGC,
<ol>
<li>must be hemmed, and
<li>shall conform to the minimum requirements in '''Table 13.1.3.4.-A''' and '''13.1.3.4.-B.'''
</ol></li>
<li>Slotted holes, to allow for the coefficient of expansion, are recommended for any length of linear metal flashing, where gasketed screws are used to secure it (See '''Figure 13.2.2.1.-A'''. Also see [[Notes to GLW Standard#A-13.2.2.1.(4)|Note A-13.2.2.1.(4)]]).
<li>The vertical leg of any ''linear metal flashing'' that overlaps roofing material
<ol>
<li>must be at least 76.2 mm (3") in height, exclusive of the drip or hemmed edge, when measured between each break,
<li>and shall overlap the edge of a membrane (i.e., membrane flashing on a wall) by at least 25.4 mm (1”).
</ol></li>
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.2.2.1.-A Roof-side face of cap flashing showing slotted hole for gasketed fastener''' Forming Part of Article 13.2.2.1. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.2.2.1.-A.png |link=https://rpm.rcabc.org/images/b/bb/Part_13_-_Illustration_-_Figure_13.2.2.1.-A.png | 600 px]]
|}

<li>All hemmed ''drip edges'' shall be broken (bent) outward from the face of the flashing by at least 30° (See '''Figure 13.2.2.1.-B''').
<li>The fabrication of linear metal flashings longer than 3048 mm (120”) is permissible, provided
<ol>
<li>galvanized steel flashings are manufactured from metal stock 24-gauge or heavier, and
<li>the method of securement, regardless of the material, allows for the coefficient of expansion (See [[Notes to GLW Standard#A-13.2.2.1.(4)| Note A-13.2.2.1.(4)]].
</ol></li>
<li>All Cap (coping) flashing shall be fabricated with a hemmed drip edge at the bottom of the outside vertical face, to receive the cleat (wind clip) (See '''Figure 13.2.2.1.-B''').
<li>Cleats (wind clips) must be fabricated with a hooked edge that both matches the angle of the cap flashing drip edge and will fit inside (be enclosed by) it (See '''Figure 13.2.2.1.-B''').
<li>When the length of cap flashing is equal to or less than 3048 mm (120”), the length of the hemmed drip edge shall be enough to enclose at least 12.7 mm (1/2”) of the cleat (wind clip) (See '''Figure 13.2.2.1.-A'''; also see[[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Clause 13.3.2.3.(2)(1)]]).
<li>When cap flashing is longer than 3048 mm (120”),
<ol>
<li>the cleat (wind clip) for the outside face of a parapet must be
<ol>
<li>continuous (discontinuous cleats (wind clips) are not permitted), and
<li>fabricated from compatible flat metal stock, two gauges heavier than the cap flashing,
</ol></li>
<li>the length of the hemmed drip edge shall be enough to enclose at least 15.88 mm (5/8”) of the hidden clip hook,
<li>the waterproofing-side face of cap flashing must be fabricated to allow for the coefficient of expansion (See [[Notes to GLW Standard#A-13.2.2.1.(4)| Note A-13.2.2.1.(4)]]:
<ol>
<li>If gasketed screws are specified, the flashing must be slotted, based on the engineered securement requirements (See [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3.]]).
<li>If a cleat (wind clip) is specified, the cleat (wind clip) and the drip edge of the flashing shall conform to the requirements for cleat (wind clip) securement on the outside face of the parapet (using hidden clips, which can allow for unfettered expansion and contraction, is considered a best practice);
</ol></li>
and
<li>seams joining lengths of cap flashing together shall conform to the engineered requirements for the flashing system (See '''Table 13.1.3.4.-A''' and '''Table 13.1.3.4.-B''').
</ol></li>
<li>With the exception of ''drip edges'', any break in the vertical face of a linear metal flashing to direct water away from the building shall be at least 30° downward (See '''Figure 13.2.2.1.-B''').
 
 
:::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.2.2.1.-B Counter-flashing and cap flashing fabrication requirements''' Forming Part of Article 13.2.2.1. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.2.2.1.-B.png|link=https://rpm.rcabc.org/images/f/fd/Part_13_-_Illustration_-_Figure_13.2.2.1.-B.png | 700 px]]
|}

<li>Base flashing must be fabricated with a drip edge or a flat hemmed edge that, when installed, shall be at least 25.4 mm (1”) above the filtration and drainage course of an insulated ''waterproofing assembly'' or ''overburden'' (See '''Figure 13.3.2.3.-E''').
<li>Metal edge flashing must be fabricated with
<ol>
<li>a flange measuring no less than 101.6 mm (4") in width,
<li>a vertical drop and hemmed drip edge at least 50.8 mm (2"), and (when transitioning to a lower ''water-shedding systems'')
<li>a sloped drop of no less than 101.6 mm (4").
</ol></li>
<li>Metal edge flashing may be constructed with or without an upstand at the outside edge (Edge flashing intended as a drainage edge may perform best without an upstand).
</ol></li>

====13.2.2.2. Pre-painted Finishes====

<ol>
<li>When a painted finish on ''linear metal flashing'' is specified, only SMP and PVDF pre-painted finishes are acceptable.
<li>Where ''Architectural Metal Roofing'' is installed, adjoining ''linear metal flashing'' must have the same finish as the metal panels.
</ol></li>

==Section 13.3. Application==
===13.3.1. Guarantee Term Requirements===
====13.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====13.3.1.2. Reserved====

===13.3.2. All Systems===
====13.3.2.1. General Requirements for Linear Metal Flashing====

<ol>
<li>RoofStar-accepted pre-engineered securement ''systems'' must be secured according to the ''manufacturer’s'' specifications.
<li>All cap (coping) flashings and other ''linear metal flashings'' subjected to wind loads on ''parapets'', roof dividers, firewalls, or any other vertical structure, must be secured to resist displacement by wind load.
<li>All ''linear metal flashing'' installed over an organic substrate (i.e., wood) shall be separated from the substrate with a suitable separation material (i.e., self-adhered bituminous membrane used as eave protection in a ''water-shedding system'').
<li>Unless otherwise provided for in this Part, mechanical fasteners used to secure ''linear metal flashing'' or their clips
<ol>
<li>shall conform to the fasteners requirements in [[#13.2.1.3. Fasteners | Article 13.2.1.3.]],
<li>shall be spaced no more than 304.8 mm (12”) O.C.,
<li>shall be firmly fastened, without distorting secured materials,
<li>must penetrate the substrate as specified in the screw manufacturer’s published minimum values, but shall nevertheless penetrate
<ol>
<li>through the back surface of steel framing at least 19.05 mm (3/4"),
<li>into or through plywood so that screw threads engage its full thickness, excluding the unthreaded tip, and
<li>into solid substrate (i.e., dimensional lumber or concrete) at least 25.4 mm (1"), and
<li>must be installed at least 88.9 mm (3-1/2") above the ''finished system surface''.
</li></ol>
</li></ol>
<li>Canted edge metal flashing may be mechanically fastened from the outside face but shall not be face-fastened on the waterproofing side of the flashing.
<li>Sealants must be tooled to positively shed water.
</li></ol>

====13.3.2.2. Seams====
(The requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1., "General Requirements for Linear Metal Flashing"]], shall be read together with the following requirements. See also [[#13.1.3.4. Gauge, Dimension Limitations, and Seams | Article 13.1.3.4.]])

<ol>
<li>RoofStar-accepted pre-engineered ''linear metal flashing'' may be joined together using seams specified for the accepted flashing.
<li>All ''linear metal flashing'' that is not pre-engineered must be seamed together following the requirements set out in this Article.
<li>All seams must allow for metal expansion and contraction.
<li>The seam and securement design must be approved by the '''''Guarantor''''' when the specified cap flashing material
<ol>
<li>is steel or aluminum, and the material is thicker or heavier than 18-gauge, or
<li>is copper and zinc, and the material thickness or weight exceeds the weight or gauge requirements in [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]]
</li></ol>
<li>'''Straight (linear) joints''' between lengths of ''linear metal flashing'' must be fully seamed using only an Standing Seam ('''Figure 13.3.2.2.-A''') or S-Lock ('''Figure 13.3.2.2.-B'''), but this requirement does not apply to
<ol>
<li>flashing fashioned from 22-gauge metal (or heavier), or
<li>the vertical face of any flashing that is concealed by a ''wall assembly'', counterflashing, or equipment flange, in which case the vertical joint may be lap-seamed, provided the overlap
<ol>
<li>is no less than 101.6 mm (4”) when fully caulked in the lap, or
<li>is no less than 152.4 mm (6”) when installed without caulking in the lap.
</li></ol>
</li></ol>
<li>The top face (horizontal plane) of flashings that intersect at a corner (i.e., coping flashing) must be joined with a standing seam.
<li>Where drip edges meet at an outside corner, the cut edges of the mitred joint must be mechanically connected (Closed with a "rat tail").
<li>When the face of vertically oriented flashing forms an '''outside corner''', and the height of the flashing
<ol>
<li>is greater than 101.6 mm (4”), the two flashings must be joined using only a standing seam.
<li>is 101.6 mm (4”) or less, the two flashings must be joined using
<ol>
<li>a standing seam,
<li>an S-lock, or
<li>a lap joint, but the drip edges must be mechanically connected (Closed with a "rat tail").
</li></ol>
</li></ol>
<li>When the face of vertically oriented flashing forms an '''inside corner''', and the height of the flashing
<ol>
<li>is greater than 101.6 mm (4”), the two flashings must be joined using only a standing seam.
<li>is 101.6 mm (4”) or less, the two flashings must be joined using
<ol>
<li>a standing seam, or
<li>a flat overlapped seam.
</li></ol>
</li></ol>
<li>Sealant applied to S-lock or standing seams is not a requirement in this Standard, but when it is specified
<ol>
<li>the sealant must be applied along the full length of the seam, and
<li>any sealant that extrudes from the seam during the seaming process must be removed and discarded (See [[#1.3.2.2. Workmanship | Article 1.3.2.2., "Workmanship"]]).
</li></ol>
<li>'''Standing seams''' (See '''Figure 13.3.2.2.-A''') must incorporate clips when the seam is longer than 101.6 mm (4”), and the clips must be
<ol>
<li>fabricated from flat metal stock 24-gauge or heavier,
<li>at least 38.1 mm (1-1/2”) wide,
<li>spaced apart from each other no more than 203.2 mm (8”) O.C.,
<li>embedded in an acceptable sealant, and
<li>secured with at least 2 acceptable low-profile flat head screws.
</li></ol>

 
::{|
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.2.-A Standing Seam''' Forming Part of Sentence 13.3.2.2.(5) (Click to expand illustration)
|-
| [[File:MF - Standing Seam.png | link=https://rpm.rcabc.org/images/a/a3/MF_-_Standing_Seam.png | 500 px]]
|}

<li>'''S-locked seams''' (See '''Figure 13.3.2.2.-B''') must be secured through flashing tab (leaf) with at least one (1) acceptable low-profile flat head screw when the seam is longer than 101.6 mm (4”), but fasteners must not be spaced more than 203.2 mm (8”) O.C.
 
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.2.-B S-Lock, Double''' Forming Part of Sentence 13.3.2.2.(11) (Click to expand illustration)
|-
| [[File:MF - S-Lock, Double.png | link=https://rpm.rcabc.org/images/b/b6/MF_-_S-Lock%2C_Double.png | 500 px]]
|}

<li>'''Flat butt seams''' (See '''Figures 13.3.2.2.-C''' and '''13.3.2.2.-D''')
<ol>
<li>are permissible only for cap (coping) flashings, and only when the flashing is fabricated from steel or aluminum ranging in thickness from 22-Gauge to 18-Gauge (the same applies to the equivalents for copper and zinc sheet material, by gauge or weight), and
<li>must have a hemmed front edge fabricated to hook onto a supporting saddle.
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.2.-C Flat butt seams''' {{hilite | Forming Part of Article 13.3.2.2. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.2.-C.png|link=https://rpm.rcabc.org/images/f/f0/Part_13_-_Illustration_-_Figure_13.3.2.2.-C.png | 600 px]]
|}

::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.2.-D Flat butt seams''' {{hilite | Forming Part of Article 13.3.2.2. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.2.-D.png|link=https://rpm.rcabc.org/images/9/92/Part_13_-_Illustration_-_Figure_13.3.2.2.-D.png | 600 px]]
|}

<li>The saddle for flat butt seams (See '''Figures 13.3.2.2.-C''' and '''13.3.2.2.-D''') must be
<ol>
<li>manufactured from the same material as the flashing,
<li>formed to match the profile of the cap flashing,
<li>fabricated with a hook along the front face,
<li>secured to the parapet with screws,
<li>installed to underlap the butt joint by at least 101.6 mm (4”) on either side,
<li>seated in two parallel beads of un-tooled sealant or butyl tape, which must be applied between the saddle and flashing, on either side of the butt joint, to all three adjoining faces, and
<li>secured to the cap flashing along both faces of the parapet (See [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]).
</li></ol>
</li></ol>

====13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing====
(The requirements in [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1., "General Requirements for Linear Metal Flashing"]], shall be read together with the following requirements)

<ol>
<li>Cap (coping) flashings must be
<ol>
<li>solidly and fully supported,
<li>separated from organic materials (i.e., wood) with roofing membrane, and
<li>joined using standing seams or S-locks (Ref. [[#13.3.2.2. Seams | Article 13.3.2.2.]]).
</li></ol>
<li>In addition to the above requirements, cap (coping) flashing installed on ''parapets''
<ol>
<li>must be secured to the outside face of the ''parapet'' with a cleat (wind clip) that hooks into the ''drip edge'' or hem of the cap flashing (See [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1., "Fabrication"]]; see also '''Figure 13.3.2.3.-A''').
<li>shall be secured along the roof-side of the ''parapet'' using either cleats (wind clips) or cladding fasteners (the method used shall be specified by the ''Design Authority'' or, when required, by a ''registered professional''), and
<li>shall not be secured to the outside face of a ''parapet'' with exposed fasteners.
</li></ol>
<li>Cleats (wind clips) shall be secured to the vertical face of a ''parapet'' and shall not be mechanically attached to the top face unless otherwise permitted in this Standard or by a written Variance from the '''''Guarantor'''''.
<li>Where cleats (“wind clips”) are required, they must
<ol>
<li>conform to the fabrication requirements in [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1.]], and
<li>be fastened as close to the bottom edge (hook) as practical but must not be fastened further than a maximum of {{hilite | 25.4 mm (1") from the bottom edge (hook).
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.3.-A General requirements for cap flashing securement''' Forming Part of Article 13.3.2.3. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.3.-A.png|link=https://rpm.rcabc.org/images/b/b9/Part_13_-_Illustration_-_Figure_13.3.2.3.-A.png | 600 px]]
|}
 
<li>The securement of ''parapet'' cap (coping) flashings longer than 3048 mm (10’) shall conform to stamped, engineered shop drawings produced by a ''registered professional'' retained by the ''Contractor''; all shop drawings shall form part of the submittal package required in [[#1.3.2.4. Contractor Submittals | Article 1.3.2.4., “Contractor Submittals”]].
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.3.-B Spacing of gasketed fasteners used on roof-side face of cap flashing''' Forming Part of Article 13.3.2.3. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.3.-B.png|link=https://rpm.rcabc.org/images/d/d7/Part_13_-_Illustration_-_Figure_13.3.2.3.-B.png | 600 px]]
|}
 
<li>Cap (coping) flashings installed on ''control joints'' (area dividers) and fire separation ''walls'' (Ref. Article 10.3.4.4. of the applicable ''waterproofing roof'' Standard) shall conform to the requirements in Sentence (2), and
<ol>
<li>may be face-fastened, provided the area divider or fire separation ''wall'' is less than 1 m (39") tall, but
<li>shall be secured with hidden clips on both sides when the area divider or fire separation ''wall'' exceeds a height of 1 m.
</li></ol>
<li>When using exposed screws to secure cap (coping) flashing is permissible, screws shall be located no more than 25.4 mm (1") above the break for the ''drip edge'' and provision shall be made for metal expansion and contraction (See [[Notes to GLW Standard#A-13.2.2.1.(4) | Note A-13.2.2.1.(4)]] and '''Figure 13.3.2.3.-C''').
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.3.-C Securement of cap flashing on exterior face of parapet wall''' Forming Part of Article 13.3.2.3. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.3.-C.png|link=https://rpm.rcabc.org/images/3/30/Part_13_-_Illustration_-_Figure_13.3.2.3.-C.png | 600 px]]
|}
 
<li>Exposed fasteners used to secure the waterproofing side face of cap flashing longer than 3048 mm (10’) shall be equally spaced along the length of the flashing but shall not be further apart than 762 mm (30”).
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.3.-D Securement of cap flashing on waterproofing side of parapet wall''' Forming Part of Article 13.3.2.3. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.3.-D.png|link=https://rpm.rcabc.org/images/0/01/Part_13_-_Illustration_-_Figure_13.3.2.3.-D.png | 600 px]]
|}
 
<li>'''Continuous concealed clips''' must be attached with fasteners spaced nor more than 304.8 mm (12") O.C.
<li>'''Discontinuous concealed clips''' must
<ol>
<li>consist of a single clip, centered between the seams of each length of metal flashing,
<li>measure at least 1/3 of the length of flashing it will secure but shall not be less than 101.6 mm (4") in length, and
<li>be fastened with screws spaced no more than 304.8 mm (12") O.C.
</li></ol>
<li>Fasteners used to secure any cap, counter, or base flashing must be evenly spaced between seams along each length of flashing, and shall be
<ol>
<li>no fewer than three (3) fasteners for every 3048 mm (120") length of metal flashing ('''Figures 13.2.3.3.-B''' and '''13.3.2.3.-D'''), or
<li>two (2) fasteners for every 2438.4 mm (96") length of metal flashing.
</li></ol>
<li>When cap (coping) flashings span widths greater than 304.8 mm (12”), and a flat butt seam is specified, the cap flashing must be riveted to the saddle to ensure adequate securement, and the rivets must be no further apart than 203.2 mm (8”) (See '''Figures 13.3.2.2.-A''' and '''13.3.2.2.-B''').
<li>Parapets that intersect a wall must be flashed with a metal saddle flashing, as shown in the "Construction Details for Linear Metal Flashings" ([[Division_D | Division D]]).
<li>When the outside face of a cap flashing is concealed by a wall assembly, only the outside face may be lap-seamed, provided the overlap is no less than 101.6 mm (4”) and the overlapping metal is embedded in mastic.
<li>Counterflashing must be secured to the vertical face, with fasteners or a reglet.
<li>Counterflashing and termination bars installed as primary securement or protection of membrane flashing
<ol>
<li>must be hemmed at the top edge and bent (broken) outward from the face of the wall by at least 45°, to form a groove for sealant (The hem shall measure at least 15.88 mm (5/8”) when measured from the break),
<li>shall be attached to the substrate with fasteners spaced no more than 304.8 mm (12”) O.C., and
<li>must be sealed along the top groove with a continuous bead of acceptable sealant, tooled to shed water away from the wall.
</li></ol>
<li>A second counterflashing (to cover a term bar or primary counterflashing)
<ol>
<li>applied as a “surface reglet” must be hemmed, broken, and sealed, as described above in this Article, and
<li>must be secured with fasteners spaced no more than 304.8 mm (12”) O.C., but this spacing may be increased to no more than 609.6 mm (24”) O.C., provided the flashing maintains continuous contact with the substrate (See [[#13.3.2.1. General Requirements for Linear Metal Flashing | Article 13.3.2.1.]]).
</li></ol>
<li>Base flashings
<ol>
<li>must be installed so that the bottom of a drip or hemmed edge is kept at least 25.4 mm (1") above the filtration layer and drainage course of an insulated ''waterproofing assembly'' or any ''overburden'' (see '''Figure 13.3.2.3.-E.'''),
<li>must be secured with fasteners spaced no more than 304.8 mm (12”) O.C., and
<li>may be fashioned as one piece, or as a 2-piece flashing that includes a lower, detachable segment to facilitate ''waterproofing system'' maintenance.
</li></ol>
 
::{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.3.-E Base metal wall flashing''' Forming Part of Article 13.3.2.3. (Click to expand illustration)
|-
| [[File:Part 13 - Illustration - Figure 13.3.2.3.-E.png|link=https://rpm.rcabc.org/images/7/7b/Part_13_-_Illustration_-_Figure_13.3.2.3.-E.png | 800 px]]
|}

<li>''Linear metal flashing'' secured in a ''reglet'' (cut groove) must be
<ol>
<li>installed above the membrane flashing,
<li>inserted into the ''reglet'' at least 12.7 mm (1/2”),
<li>friction-fitted within the ''reglet'' or secured on the exposed face with an acceptable fastener, and
<li>sealed with a continuous bead of tooled gunnable sealant.
</li></ol>
<li>Where parallel and overlapping reglet flashings are used, the joints between flashing segments must be offset by at least 304.8 mm (12”), except at corners.
</li></ol>

====13.3.2.4. Reserved====

====13.3.2.5. Reserved====

<hr>
<div id=PART_14></div>

=Part 14 - Waterproofing as a Platform=
==Section 14.1. Design==
(This Part covers the design and installation requirements for ''waterproofing assemblies'' that support an ''overburden'', which may be structurally supported or directly supported by the ''waterproofing assembly'')

(See [[Notes to GLW Standard#A-14.1. | Note A-14.1.]])

===14.1.1. General===
====14.1.1.1. Scope====

<ol>
<li>The scope of this Part and the Standard shall be as described in [[Scope of RPM and Standards | Division A, Part 1]].
</li></ol>

====14.1.1.2. Defined Terms====

<ol>
<li>Words that appear in italics are defined in the [[Glossary | Glossary]]. Additionally, the following terms are used in this Part:
<ol>
<li>''Overburden'' means any material, structure or item of equipment that is placed on top of (but not fastened to or through) a ''waterproofing system'' (roof, or at grade). Gravel or pavers are considered ''overburden'' when they do not function as securement for the ''waterproofing assembly''.
<li>''System Coverings'' means (without limitation) gravel, wearing surfaces, landscaping, pavers, cast-in-place concrete, and rubberized surfaces, broadly covering and directly superimposed on the ''waterproofing assembly'' (See [[Notes to GLW Standard#A-14.1. | Note A-14.1.1.2.(1)]]).
<li>''Structures and Equipment'' means structurally supported or portable objects including (without limitation) wood or composite decks and walkways, planters, "amenity spaces" (inclusive of furnishings, hot tubs, gazebos, pergolas, and play areas), nets and wind screens, photovoltaics, satellite equipment, light standards, lightning rods, sculptures, pools, and other water features.
</li></ol>
</li></ol>

===14.1.2. Guarantee Term Requirements===
====14.1.2.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====14.1.2.2. Reserved====

====14.1.2.3. Reserved====

===14.1.3. All Systems===
====14.1.3.1. Coverage and Limitations====

<ol>
<li>Coverage under the '''''RoofStar Guarantee''''' shall be as described in [[Guarantee#3.2.1.2._Limitations_and_Exclusions_of_Guarantee | Division A, Article 3.2.1.2.]]
</li></ol>

====14.1.3.2. Loads====

<ol>
<li>The building structure must be designed to support any live loads specified by the Code having jurisdiction, including loads from any ''system covering'', amenity space, structure, or live loads superimposed upon the ''waterproofing assembly''.
<li>Structural supports (i.e., curbs) should be considered to bear heavier dead loads, to resist ''specified wind loads'', or to secure the equipment during seismic events.
</li></ol>

====14.1.3.3. Securement of System Coverings, Structures, and Equipment====

<ol>
<li>The ''Design Authority'' is responsible for specifying the appropriate securement design of ''system coverings'', structures, and equipment, to resist ''specified wind loads''.
<li>Where structural securement is desirable or required,
<ol>
<li>structural supports must be fully waterproofed (curbs, sleepers, posts) and
<li>the superimposed structure or equipment must be secured to the structural support at least 203.2 mm (8”) above the ''drainage plane'' (See [[#Part 12 - Penetrations and Curbs | Part 12 - Penetrations and Curbs]], and [[#Part 3 - Securing the Roof Assembly | Part 3 - Securing the Roof Assembly]]).
</li></ol>
</li></ol>

====14.1.3.4. Design for Repairs and Renewal====

<ol>
<li>Each design should, without limitation, include consideration for
<ol>
<li>the inevitability of ''waterproofing system'' repairs or replacement,
<li>access for maintenance, and
<li>material removal, storage, and replacement logistics.
</li></ol>
</li></ol>

====14.1.3.5. Waterproofing Membranes====

<ol>
<li>Membranes must be selected for their ability to resist accidental puncture by human activity on the ''waterproofing assembly''; except for hot fluid-applied rubberized asphalt, the minimum puncture resistance must be at least 400 N (See Table 9.2.1.1. in [[#9.2.1.1. Membrane Composition, Thickness, and Selection | Article 9.2.1.1.]]).
</li></ol>

====14.1.3.6. Membrane Protection====

<ol>
<li>Membranes must be protected from damage incurred
<ol>
<li>during the construction of a building,
<li>from normal use and occupancy of the ''deck'' protected by the ''waterproofing system'', and
<li>from maintenance of any installation on top of a ''waterproofing system'', after the building has been commissioned.
</li></ol>
<li>Where membranes installed on vertical surfaces may be damaged from foot traffic or shifting coverings, they must be protected (i.e., with base metal flashing; ref. [[#13.1.3.6. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.1.3.6.]]).
</li></ol>
</li></ol>

====14.1.3.7. Membrane Integrity Testing and Electronic Leak Detection====
(See [[#1.1.3.3. Membrane Integrity Testing | Article 1.1.3.3.]] and [[#1.1.3.4. Electronic Leak Detection | Article 1.1.3.4.]])

====14.1.3.8. Drainage====

<ol>
<li>''Waterproofing assemblies'' that will be covered with ''overburden'', including amenity spaces or equipment, must promote unimpeded drainage of storm or irrigation water.
<li>Where a ''system covering'' material naturally drains (i.e., gravel), no additional drainage design is required, but when it does not naturally drain, or when the ''system covering'' may introduce a “vapour closed” condition, the system shall conform to the requirements in [[#7.1.6.2. Drainage Mats and Filter Fabric | Article 7.1.6.2.]]
<li>''Overburden'' must be contained with drain guards, rigid barriers, and filter fabric (See also [[#11.3.2.3. Drain Protection Against Blockage | Article 11.3.2.3.]]).
<li>To facilitate the adequate movement of water and minimize or prevent damming when non-structural supports are oriented perpendicular to (across) the direction of drainage, the design must
<ol>
<li>specify shorter supports, to a maximum length of 1219.2 mm (48"), and
<li>incorporate drainage mats beneath supports longer than 1219.2 mm (48") in any direction.
</li></ol>
<li>Equipment installed on structural supports, or on top of the ''waterproofing system'', must be spaced or located to promote access to ''drains'', ease of maintenance, and worker or occupant safety.
</li></ol>

====14.1.3.9. Filter Fabric====

<ol>
<li>Filter fabrics are required when the ''waterproofing assembly'' supports
<ol>
<li>any ''overburden'', including landscaping,
<li>sand and other fine materials,
<li>gravel with a diameter less than 12.7 mm (1/2”),
<li>wet mortar or concrete, or
<li>XPS insulation above the membrane (See [[Notes to GLW Standard#A-14.1.3.9. | Note A-14.1.3.9.]]).
</li></ol>
</li></ol>

====14.1.3.10. Decorative Stone (Aggregate Rock) Covering====
(See [[Notes to GLW Standard#A-14.1.3.10. | Note A-14.1.3.10.]])

<ol>
<li>When smooth stone (aggregate rock) is specified as the ''system covering'' (different from ballast),
<ol>
<li>only washed gravel may be used, and
<li>the design must include gravel guards around ''drains''.
</li></ol>
<li>When the aggregate rock used as a ''system covering'' is crushed, or is smaller than 12.7 mm (1/2”),
<ol>
<li>a geotextile protection layer must be installed immediately above the waterproofing membrane, and
<li>the crushed aggregate must be deep enough to hold the geotextile protection layer in place.
</li></ol>
</li></ol>

====14.1.3.11. Wearing Surfaces====
(See also [[#9.1.3.4. Membrane Protection | Article 9.1.3.4.]] concerning wearing surfaces and drainage requirements)

<ol>
<li>Any wearing surface may be installed on an ''uninsulated assembly'', provided
<ol>
<li>the wearing surface does not bond with or touch the field waterproofing membrane or membrane flashing, and
<li>drainage of storm or irrigation water is not impeded.
</li></ol>
<li>When a wearing surface is specified,
<ol>
<li>it must incorporate measures to protect the waterproofing membrane from damage,
<li>perimeter membranes and penetrations must be protected from abrasion by the wearing surface,
<li>the design must provide a drainage space below the wearing surface measuring at least 12.7 mm (1/2”) in depth, and
<li>the design must provide a vertical drainage gap between the wearing surface and any openings.
</li></ol>
<li>Accessible wearing surfaces that permit relatively easy access to the waterproofing membrane, for serviceability and repairs, are strongly recommended.
<li>When cast-in-place concrete is specified as the wearing surface (See [[Notes to GLW Standard#A-14.1.3.11. | Note A-14.1.3.11.]]), the design must conform to the other requirements in this Article, and the membrane, including membrane flashing, must be kept separate from the concrete with
<ol>
<li>a bond-breaking material, such as a proprietary drainage mat or XPS insulation, and
<li>filter fabric or a barrier material acceptable to the membrane manufacturer, able to prevent the concrete slurry from reaching the membrane.
</li></ol>
<li>Scoring solid cast-in place concrete protection slab (split-slab) and asphalt paving wearing courses, using straight surface score lines (indents) spaced no more than 2 m (78-3/4”) apart, formed in a grid pattern (squares, rectangles, diamonds, etc.), is recommended to facilitate cutting for removal of wearing course sections, to locate possible breaches in membranes; the casting and scoring of concrete wearing courses is the work of others).
</li></ol>

====14.1.3.12. Reserved====

====14.1.3.13. Structures and Equipment====

<ol>
<li>Non-structural installations superimposed on a ''waterproofing assembly'' (See '''Figure 14.1.3.13.-A''')
<ol>
<li>are recommended for smaller installations, to
<ol>
<li>minimize the number of penetrations, curbs, or sleepers necessary for structural securement,
<li>eliminate possible weak points in the ''waterproofing system'', where a leak may occur,
<li>avoid dedicated mechanical drainage, and
<li>simplify removal of materials when membrane repairs are required.
</li></ol>
<li>must take into account inevitable ''waterproofing system'' renewal (see [[Notes to GLW Standard#A-14.1.3.13. | Note A-14.1.3.13.]]),
<li>shall be designed for stability and able to resist movement, including seismic movement, but shall not be anchored into the ''waterproofing system'',
<li>must be placed on an appropriate protection layer or supported by pedestals, pavers, or other means of distributing weight and point loading, or placed on
<ol>
<li>a suitable drainage layer conforming to [[#14.2.1.4. Drainage Materials | Article 14.2.1.4.]], and
<li>an appropriate protection layer, and
</li></ol>
<li>may be placed on an insulated ''waterproofing system'' provided the insulation will support all anticipated dead loads, live loads and point loads (See [[#14.1.3.2. Loads | Article 14.1.3.2., "Loads"]]).
</li></ol>
<li>When “structural” ''walls'', planters, equipment pads, and other installations are
<ol>
<li>'''cast-in-place concrete''' without a pre-curb, they may be formed, reinforced, and poured directly on the slab, before it is waterproofed, but they must then be fully enveloped with waterproofing membrane (See '''Figure 14.1.3.13.-B''').
<li>'''cast-in-place concrete''' and are formed, reinforced, and poured over a pre-curb as described and required in this Article (See '''Figure 14.1.3.13.-C'''),
<ol>
<li>the pre-curb must be fully enveloped with waterproofing membrane, as part of the primary waterproofing, and
<li>the inside of planter ''walls'' must be sealed with waterproofing membrane as required in [[#14.3.2.7. Structures and Equipment | Article 14.3.2.7.]]
</li></ol>
<li>'''masonry''' (See '''Figure 14.1.3.13.-D'''), they must be anchored to the structural ''deck'' with internal reinforcement but may be waterproofed using either of the methods described for cast-in-place elements.
<li>'''pre-cast''', they must be secured
<ol>
<li>to a pre‐curb that is continuously waterproofed as a continuation of the primary waterproofing membrane, or
<li>to structural supports that are waterproofed in keeping with the requirements in [[#Part 12 - Penetrations and Curbs | Part 12]].
</li></ol>
</li></ol>
<li>When concrete ''walls'' or structures are constructed without a pre-curb, all concrete surfaces must be fully and continuously enveloped with the primary waterproofing membrane (See also [[Guarantee#3.2.1.3. Excluded Causes of Leaking | Division A, Article 3.2.1.3. Excluded Causes of Leaking]]).
<li>Pre‐curbs must be
<ol>
<li>at least 101.6 mm (4") in height above the ''drainage plane'' of the highest adjacent ''waterproofing assembly'' (See [[Notes to GLW Standard#A-14.1.3.13.(4) | Note A-14.1.3.13.(4))]],
<li>completely enveloped with fully adhered acceptable membrane flashing (including all faces of drainage knock‐outs),
<li>reinforced with dowels epoxied into the pre-curb (see [[#14.3.2.7. Structures and Equipment | Article 14.3.2.7.]]), and
<li>properly waterproofed around dowels in their final position, using
<ol>
<li>a 2-component catalyzed polymethyl methacrylate (PMMA) or polyurethane methyl methacrylate (PUMA) reinforced liquid membrane flashing system, or
<li>two cured coats of an RGC-accepted polyurethane or silicon-based single-component liquid flashing system (See [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6., "Liquid Membrane Flashing"]]).
</li></ol>
</li></ol>
<li>Every planter design must be designed to drain water out of the planter.
<li>Structural planters that adjoin
<ol>
<li>an uninsulated ''waterproofing assembly'' may be drained with
<ol>
<li>a plumbed mechanical ''drain'', or
<li>drainage knock-outs in the pre-curb ''wall'', which should be wide enough to allow for the free flow of water over or past of the membrane flashing plies.
</li></ol>
<li>an insulated ''waterproofing assembly'' shall be drained by only plumbed mechanical drains; knock-outs through a pre-curb are not permissible.
</li></ol>
<li>A design review is advisable when a structural water feature incorporates penetrations for wiring, lights, or other submerged features.
<li>Tiles or other architectural finishes may be applied to the waterproofing membrane, subject to a written Variance from the '''''Guarantor''''' and approval by the membrane manufacturer (See [[#1.1.3.6. Variances | Article 1.1.3.6., "Variances"]]).
<li>''Drains'', re-circulation inlets, and outlets used in water features, must include clamping rings, and must be sealed to the membrane ''assembly''.
<li>When a leak detection system is specified, only non‐ferrous metal ''drains'' may be used.
</li></ol>
</li></ol>
</li></ol>

==Section 14.2. Materials==
===14.2.1. Material Properties===
====14.2.1.1. Field and Flashing Membranes====

<ol>
<li>Refer to Article 9.2.1.1. of the published RGC Standard for the specific membrane:
<ol>
<li>[https://rpm.rcabc.org/index.php?title=SBS_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.] in the "RGC Standard for SBS-modified Bituminous Membrane Roofs".
<li>[https://rpm.rcabc.org/index.php?title=Hot_Rubber_Roof_Systems_Standard#9.2.1.1._Membrane_Composition.2C_Thickness.2C_and_Selection Article 9.2.1.1.] in the "RGC Standard for Hot Fluid-applied Rubberized Asphalt Roofs".
</li></ol>
<li>Single and 2-component liquid membrane flashing systems used on any detail, including pre-curbs, must be listed in [[Division_C | Division C]], and must be proprietary to, or accepted by, the ''manufacturer''.
</li></ol>

====14.2.1.2. Membrane Protection====

<ol>
<li>Refer to [[#9.3.2.7. Protection of Membranes | Article 9.3.2.7.]]
</li></ol>

====14.2.1.3. Reserved====

====14.2.1.4. Drainage Materials====

<ol>
<li>Drainage mats, geo-synthetic drainage cores, and geo-composites used beneath any non-vegetated ''overburden'' and above insulation (when it is specified),
<ol>
<li>may be manufactured with a factory laminated filter fabric, which are designed to resist damage from the weight of the specified ''overburden'',
<li>should be
<ol>
<li>molded (dimpled) or woven plastic grids with a minimum thickness (depth) of 9.5 mm (3/8") thick, and
<li>designed to provide uniform support as well as traffic-bearing properties for overburdens and wearing courses, and
</li></ol>
<li>must be
<ol>
<li>acceptable to manufacturers of both the membrane and insulation,
<li>suitable for the installed ''system covering'',
<li>selected for their ability to support dead loads, live loads, and point loads, and
<li>capable of permitting the anticipated flow rate of water.
</li></ol>
</li></ol>
<li>Proprietary geocomposite and geosynthetic panels must be designed with sufficient compressive strength to support the design load of ''overburdens'' as well expected live loads and be acceptable for use by th''e membrane manufacturer''.
</li></ol>

====14.2.1.5. Insulation and Insulation Overlays====
(See [[#Part 7 - Insulation | Part 7, "Insulation"]], and [[#Part 8 - Insulation Overlays | Part 8, "Insulation Overlays"]])

<ol>
<li>All insulation specified for use in a ''waterproofing system'' must be XPS and shall conform to the requirements in [[#7.2.2.1. Extruded Polystyrene Insulation | Article 7.2.2.1.]] and shall be capable of supporting any superimposed loads.
<li>When XPS (with or without a concrete topping) is specified as the drainage layer, it must be grooved (by the manufacturer, or as a post-manufacturing alteration).
</li></ol>

====14.2.1.6. Filter Fabric====

<ol>
<li>Filter fabrics that are not factory-bonded to a drainage layer must be
<ol>
<li>acceptable to the ''manufacturer'',
<li>suitable for the installed ''system covering'',
<li>selected for their ability to support dead loads, live loads, and point loads, and
<li>capable of permitting the anticipated flow rate of water.
</li></ol>
<li>Fabric filter mats must be
<ol>
<li>water permeable and have proven long term weather resistance, and
<li>strong enough to withstand traffic abuse and prevent displacement of insulation boards under flotation conditions.
</li></ol>
</li></ol>

====14.2.1.7. Decorative Stone (Aggregate Rock) Covering====

<ol>
<li>Decorative stone (aggregate rock) (See [[Notes to GLW Standard#A-14.1.3.10. | Note A-14.1.3.10.]]) must be washed and may be smooth or crushed.
<li>Large grade stone may withstand wind scour more effectively than smaller stone, but the ''Design Authority'' must determine the gradients, based on the ''specified wind loads'' for the ''waterproofing assembly'' (See also Article 3.2.2.3. Stone (Gravel) Ballast in the related waterproofing roof Standard).
</li></ol>

====14.2.1.8. Pavers and Pedestals====

<ol>
<li>Pavers that are partially supported (i.e., with pedestals) must be capable of resisting anticipated loads.
<li>Pedestals
<ol>
<li>must provide airflow for drying surfaces and assist in leveling,
<li>must be purpose-made and include an integral spacer rib no more than 4.76 mm (1/8”) wide, to uniformly separate pavers,
<li>should not impede the flow of water or air,
<li>should uniformly distribute the dead load of pavers and predicted live loads, and
<li>should be adjustable when a level surface is required, and
</li></ol>
</li></ol>

==Section 14.3. Application==
===14.3.1. Guarantee Term Requirements===
====14.3.1.1. RoofStar 5-year Guarantee and RoofStar 10-year Guarantee====

<ol>
<li>To qualify for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part.
</li></ol>

====14.3.1.2. Reserved====

===14.3.2. All Systems===
====14.3.2.1. Membranes and Membrane Protection====

<ol>
<li>Membranes and membrane flashing must be installed in keeping with the requirements found elsewhere in this Standard.
<li>Protection of waterproofing membranes from mechanical damage caused by tools, accident or the work of others is mandatory during the installation and maintenance of any ''system covering'' or living space (See also [[#9.1.3.4. Membrane Protection | Article 9.1.3.4. Membrane Protection]], for related requirements).
</li></ol>

====14.3.2.2. Filter Fabric====

<ol>
<li>Fabric filter rolls must be
<ol>
<li>at least 2489.2 mm (98") wide,
<li>installed loose-laid (un-bonded) over the insulation and below any type of ballast or ''system covering'',
<li>overlapped at all edges a minimum of 304.8 mm (12"),
<li>slit to fit over penetrations,
<li>cut out around ''drains'' and other openings,
<li>carried up all vertical transitions (including penetration flashings) above the ''finished system surface'' at least 76.2 mm (3”),
<li>loosely held in place behind metal counterflashings or ''wall'' finishes, at all perimeter edges and curbs, and
<li>secured around penetration flashings.
</li></ol>
</li></ol>

====14.3.2.3. Drainage====

<ol>
<li>The location of the drainage layer(s) shall conform to the requirements in [[#Part 7 | Part 7]].
<li>A second drainage layer may be installed above the insulation, but this is at the discretion of the ''Design Authority''.
<li>Specialized proprietary drainage products must be acceptable to the ''manufacturer''.
</li></ol>

====14.3.2.4. Decorative Stone (Aggregate Rock) Covering====

<ol>
<li>When decorative stone (aggregate rock) is specified as a ''system covering'', only washed stone may be used.
<li>Ballast guards must be installed around all ''drains'' (See [[#11.3.2.3. Drain Protection Against Blockage | Article 11.3.2.3.]]).
<li>Crushed stone specified as a ''system covering'' must be
<ol>
<li>installed over a geotextile protection layer, or its equivalent, when the stone is crushed or smaller than 12.7 mm (1/2”) in diameter, and
<li>must be applied with sufficient volume to hold down the protection layer against displacement by wind.
</li></ol>
</li></ol>

====14.3.2.5. Wearing Surfaces====

<ol>
<li>Pavers on pedestals promote free subsurface drainage at the membrane level and are therefore strongly recommended whenever practical.
<li>Pavers and unit-type masonry, such as brick or stone, must be supported by
<ol>
<li>proprietary (purpose-made) pedestals with at least a 4.76 mm (1/8”) integral spacer ribs for uniform spacing of pavers,
<li>a proprietary drainage layer overlaid with a filter fabric mat, or
<li>a drainage layer of loose aggregate (such as pea gravel) measuring at least 25.4 mm (1") in depth, installed over a filter fabric.
</li></ol>
<li>Pedestals, or a drainage layer,
<ol>
<li>shall be installed above the filtration layer, which may be laid over a membrane protection layer (in an uninsulated system) or over XPS insulation,
<li>must permit at least 12.7 mm (1/2″) of vertical separation between the paver and the underlying substrate, to provide airflow for drying surfaces and assist in leveling, and
<li>should not impede the flow of water or air, and should uniformly distribute the dead load of pavers, and other unit masonry products, as well as predicted live loads.
</li></ol>
<li>Pedestals shall be installed above the filtration layer, which may be laid over a membrane protection layer (in an uninsulated system) or over XPS insulation.
<li>Cast-in-place concrete installed directly above the roof membrane must be separated from the membrane and its protection layers with material and a filter fabric or barrier material specified by the ''Design Authority'' and conforming to the requirements in [[#14.1.3.11. Wearing Surfaces | Article 14.1.3.11.]]
</li></ol>

====14.3.2.6. Reserved====

====14.3.2.7. Structures and Equipment====

<ol>
<li>Structures must conform to the requirements in [[#14.1.3.13. Structures and Equipment | Article 14.1.3.13.]]; structures that do not conform must be reviewed with the ''Design Authority'' before waterproofing.
<li>Pre‐curbs (Figure 14.3.2.7.-A) must
<ol>
<li>achieve a finished height at least 101.6 mm (4") above the drainage plane of the highest adjacent waterproofing assembly (For an example of this see Construction Detail "Structural Planter"), and
<li>be completely enveloped with fully adhered acceptable sheet or liquid membrane flashing (including all faces of drainage knock‐outs).
</li></ol>
<li>All planters and water features must be fully waterproofed on the inside; sheet membrane installation must conform to the requirements in [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]], and liquid membrane flashing shall conform to the requirements in [[#10.3.3.4. Liquid Membrane Flashing | Article 10.3.3.4.]]
<li>All membrane flashing shall terminate
<ol>
<li>on the outside face of the planter wall, at least 50.8 mm (2”) below the upper edge, or
<li>on the inside face of the planter wall with a cut reglet ''linear metal flashing'', caulked with sealant and installed no less than 50.8 mm (2”) above the top surface of growing media.
</li></ol>
<li>Structural installations that do not incorporate pre-curbs must be fully enveloped with membrane, which shall be installed to conform to Article 10.3.2.3.
 
:{|
|-
|-
| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 14.3.2.7.-A Pre-curbs and Sheet Membrane Flashing''' || 2025-October-25 }} {{hilite | Forming Part of Article 14.3.2.7. || 2025-October-25 }} (Click to expand illustration)
|-
| [[File:SBS Figure 14.3.1.jpg|link=http://rpm.rcabc.org/images/5/5b/SBS_Figure_14.3.1.jpg | 450 px]]
|}

<li>Dowels (reinforcement bar) should be
<ol>
<li>inserted into the pre‐curb after application of sheet membrane flashing, and
<li>waterproofed in their final position, where they penetrate the pre-curb.
</li></ol>
<li>When dowels are installed prior to the application of sheet membrane flashing, membrane flashing must be applied over the ''curb'' and around the dowels, and the dowels shall be waterproofed with an RGC-accepted, reinforced 2-component liquid membrane flashing system.
<li>Dowels must be waterproofed with
<ol>
<li>a single application of an RGC-accepted reinforced 2-component liquid membrane flashing, or
<li>two (2) applications of a single-component liquid membrane flashing,
<ol>
<li>applied to properly prepared surfaces,
<li>fully cured between coats,
<li>in keeping with the application requirements in [[#10.3.3.4. Liquid Membrane Flashing | Article 10.3.3.4.]], for 2-component reinforced liquid membrane flashing, or the manufacturer’s instructions, when using a single-component liquid membrane flashing, and
<li>applied no less than 50.8 mm (2”) on vertical surfaces and in a radius around the base of each dowel.
</li></ol>
</li></ol>
<li>When structures or equipment exceed the limits stated in [[Guarantee#3.2.1.6. Removal and Reinstatement of Overburden | Division A, Article 3.2.1.6. Removal and Reinstatement of Overburden]], a membrane integrity scan and any resulting repairs must be undertaken before the membrane is covered.
</li></ol>

<hr>
<div id=NOTES></div>

=[[Notes to SBS Standard | Notes to Standard]]=

</div>
</div>
<div class="col-md-12">

[[RCABC Roofing Practices Manual| Home]]
</div>

{{Template:RPM Page Footer with Copyright and Current Date}}

(Draft) Notes to GLW Standard

2026-06-19T21:40:09Z

James Klassen: /* Notes to Part 1 */

(Draft) Notes to GLW Standard

2026-06-19T21:12:52Z

James Klassen: /* A-1.1.3.3. Membrane Integrity Scans */