(Draft) RGC Standard for Grade-level Waterproofing Systems - Revision history

James Klassen: /* 12.3.2.6. Liquid Membrane Flashing */

2026-10-23T15:21:56Z

‎12.3.2.6. Liquid Membrane Flashing

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James Klassen: /* 12.2.1.5. Liquid Membrane Flashing */

2026-10-23T15:18:49Z

‎12.2.1.5. Liquid Membrane Flashing

James Klassen: /* 10.2.1.1. Flashing Membranes */

2026-10-23T15:08:09Z

‎10.2.1.1. Flashing Membranes

James Klassen: /* 14.3.2.7. Structures and Equipment */

2026-10-22T21:17:59Z

‎14.3.2.7. Structures and Equipment

James Klassen: /* 14.1.3.13. Structures and Equipment */

2026-10-22T21:17:18Z

‎14.1.3.13. Structures and Equipment

James Klassen: /* 14.3.2.7. Structures and Equipment */

2026-10-22T21:11:49Z

‎14.3.2.7. Structures and Equipment

James Klassen: /* 14.1.3.13. Structures and Equipment */

2026-10-22T20:49:41Z

‎14.1.3.13. Structures and Equipment

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James Klassen: /* 13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing */

2026-10-22T18:00:27Z

‎13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing

James Klassen: /* 13.2.2.1. Fabrication of Flashing */

2026-10-22T17:43:42Z

‎13.2.2.1. Fabrication of Flashing

James Klassen: /* 13.1.3.5. Fit and Finish */

2026-10-22T17:32:41Z

‎13.1.3.5. Fit and Finish

@@ Line 2,782: / Line 2,782: @@
 </li></ol>
-====12.2.1.5. Liquid Membrane Flashing====
+====12.2.1.4. {{hilite | Liquid Flashing Systems|| 2027-October-31 }}====
 <ol>
-<li>Polymethyl methacrylate (PMMA) and polyurethane methyl methacrylate (PUMA) liquid membrane flashing systems must be
+<li>{{hilite | Liquid membrane flashing systems suitable for applications permitted in [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6.]] must be || 2027-October-31 }}
 <ol>
-<li> catalyzed 2-component systems,
+<li>{{hilite | accepted by the '''''Guarantor''''' and listed in [[Division C | Division C]], || 2027-October-31 }}
-<li>fleece-reinforced with the manufacturer's proprietary polyester fleece, and
+<li>{{hilite | proprietary to, or accepted by, the ''manufacturer'' of the primary membrane applied to the field system, || 2027-October-31 }}
-<li>accepted listed in [[Division C | Division C]] of this ''Manual''.
+<li>{{hilite | applied in multiple coats, and || 2027-October-31 }}
 </li></ol>
-<li>Single-component polyurethane and silicon-based liquid membrane flashing system must be listed in [[Division C | Division C]].
+<li>{{hilite | Liquid membrane flashing systems suitable for use as coatings, or to flash details more than 101.6 mm (4”) above the drainage plane (Sentence (7) of [[#12.3.2.6. Liquid Membrane Flashing | Article 12.3.2.6.]]) must be || 2027-October-31 }}
 <ol>
-<li>must be listed in [[Division C | Division C]], and
+<li>{{hilite | accepted by the '''''Guarantor''''' and listed in Division C, and || 2027-October-31 }}
-<li>must be reinforced with chopped or loose reinforcement fibres supplied by the ''manufacturer''.
+<li>{{hilite | proprietary to, or accepted by, the ''manufacturer'' of the primary membrane applied to the field system. || 2027-October-31 }}
 </li></ol>
 </li></ol>

@@ Line 1,987: / Line 1,987: @@
 </li></ol>
 <li><span class="principles">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''</span>.
-<li>Fleece-reinforced liquid membrane flashing systems must be accepted by the '''''Guarantor''''' and proprietary to, or accepted by, the ''manufacturer''.
+<li>Liquid membrane flashing systems {{hilite | suitable for use in the ''drainage plane'', or for terminating sheet membrane flashing on ''walls'' and ''parapets''|| 2027-October-31 }}, must be
 </li></ol>

@@ Line 4,051: / Line 4,051: @@
 <li>Pre‐curbs ({{hilite | '''Figure 14.3.2.7.-A''' || 2025-October-25 }}) must
 <ol>
-<li>achieve a finished height at least 101.6 mm (4") above the ''drainage plane'' of the highest adjacent ''roof assembly'' (See Construction Detail [[SBS Structural Planter | "Structural Planter"]]), and
+<li>achieve a finished height at least 101.6 mm (4") above the ''drainage plane'' of the highest adjacent ''waterproofing assembly'' (See Construction Detail [[SBS Structural Planter | "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>
@@ Line 4,076: / Line 4,076: @@
 <li>{{hilite | Structural installations that do not incorporate pre-curbs must be || 2023-June-16 }}
 <ol>
-<li>{{hilite | flashed to cover the complete exterior surface with roof membrane, or || 2023-June-16 }}
+<li>{{hilite | flashed to cover the complete exterior surface with waterproofing membrane, or || 2023-June-16 }}
 <li>{{hilite | flashed with sheet membrane that is installed, terminated, and protected to conform to || 2023-June-16 }} [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]]
 </li></ol>

@@ Line 3,783: / Line 3,783: @@
 <ol>
-<li>{{hilite | Floating prefabricated components or structures|| 2027-October-31 }} superimposed on a ''roof assembly'', {{hilite | including precast concrete planter walls ('''Figure 14.1.3.13.-A'''), || 2027-October-31 }}
+<li>{{hilite | Floating prefabricated components or structures|| 2027-October-31 }} superimposed on a ''waterproofing assembly'', {{hilite | including precast concrete planter walls ('''Figure 14.1.3.13.-A'''), || 2027-October-31 }}
 <ol>
 <li><span class="recommended">are recommended for smaller installations, to</span>
@@ Line 3,791: / Line 3,791: @@
 <li><span class="recommended">simplify removal of materials when membrane repairs are required</span>.
 </li></ol>
-<li>{{hilite | must take into account inevitable roof renewal || 2023-June-16 }} (see [[Notes to SBS Standard#A-14.1.3.13. | Note A-14.1.3.13.]]),
+<li>{{hilite | must take into account inevitable system renewal || 2023-June-16 }} (see [[Notes to SBS Standard#A-14.1.3.13. | Note A-14.1.3.13.]]),
 <li>must be placed on an appropriate protection layer or supported by pedestals, pavers, or other means of distributing weight and point loading,
 <li>{{hilite | shall be installed above a drainage layer with suitable supports, and || 2027-October-31 }}
-<li>may be placed on an ''insulated roof 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>may be placed on an insulated 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>
 <br>
@@ Line 3,808: / Line 3,808: @@
 <ol>
 <li>{{hilite | continuously waterproofed as part of the primary waterproofing, and || 2027-October-31 }}
-<li>{{hilite | waterproofed independently of the primary roof membrane|| 2027-October-31 }}
+<li>{{hilite | waterproofed independently of the primary waterproofing membrane|| 2027-October-31 }}
 </li></ol>
 <li>{{hilite | and the planter wall must be continuously waterproofed on the inside, to a height of at least 203.2 mm (8") above the ''finished system surface'', to prevent leaking through the planter ''wall'' (it will also serve to minimize or prevent efflorescence on the exterior surface of the wall). (See '''Figures 14.1.3.13.-B''' and '''C'''). || 2027-October-31 }}
@@ Line 3,831: / Line 3,831: @@
 <ol>
 <li>{{hilite | waterproofing shall not run continuously across the ''deck'' (slab), beneath the ''wall'' or structure, and || 2027-October-31 }}
-<li>all concrete surfaces must be fully and continuously enveloped with the primary roof membrane ({{hilite | See '''Figures 14.2.3.13.-D''' and '''E'''; also refer to|| 2027-October-31 }} [[Guarantee#3.2.1.2. Limitations and Exclusions of Guarantee | Division A, Article 3.2.1.2.]]).
+<li>all concrete surfaces must be fully and continuously enveloped with the primary waterproofing membrane ({{hilite | See '''Figures 14.2.3.13.-D''' and '''E'''; also refer to|| 2027-October-31 }} [[Guarantee#3.2.1.2. Limitations and Exclusions of Guarantee | Division A, Article 3.2.1.2.]]).
 </li></ol>
 <br>
@@ Line 3,849: / Line 3,849: @@
 <li>Pre‐curbs must be
 <ol>
-<li>at least 101.6 mm (4") in height above the drainage plane of the highest adjacent ''roof assembly'',
+<li>at least 101.6 mm (4") in height above the drainage plane of the highest adjacent ''waterproofing assembly'',
 <li>completely enveloped with fully adhered acceptable membrane flashing (including all faces of drainage knockouts), and
 <li>properly waterproofed around dowels {{hilite |in their final position, using|| 2021-February-7 }}
@@ Line 3,857: / Line 3,857: @@
 </li></ol>
 </li></ol>
-<li>When a structural planter adjoins a ''protected roof system'', the planter design must include
+<li>When a structural planter adjoins a protected membrane system, the planter design must include
 <ol>
 <li>a plumbed mechanical drain {{hilite | conforming to the requirements for planter drains in the [https://rpm.rcabc.org/index.php?title=VRA_Standard “RGC Standard for Vegetated Roofs”] || 2025-October-25 }}, or
@@ Line 3,869: / Line 3,869: @@
 | [[File:Illustration Unavailable (Filler Image).png |class=img-responsive | link= | 500 px]]
 |}
-<li>When a structural planter adjoins an ''insulated roof system'', only a plumbed mechanical drain is permissible.
+<li>When a structural planter adjoins an insulated waterproofing system, only a plumbed mechanical drain is permissible.
 <li><span class="recommended">A design review is advisable when a structural water feature incorporates penetrations for wiring, lights, or other submerged features</span>.
 <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"]]).

@@ Line 4,044: / Line 4,044: @@
 <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>Structural installations (i.e., planters, pools, ponds, or water courses) must be constructed with
 <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>a pre‐curb (start‐up curb), onto which the installation is formed and poured, or
 <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.]]
+<br>
-<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>{{hilite | on the outside face of the planter wall, at least 50.8 mm (2”) below the upper edge, or || 2023-June-16 }}
-<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>{{hilite | 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 {{hilite | ('''Figure 14.3.2.7.-B''')|| 2027-October-31 }}. || 2023-June-16 }}
 </li></ol>
 <br>
-:{|
+::{|
 |-
-| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 14.3.2.7.-A Pre-curbs and Sheet Membrane Flashing''' || 2025-October-25 }}<br>{{hilite | Forming Part of Article 14.3.2.7. || 2025-October-25 }}<br><small>(Click to expand illustration)</small>
+| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 14.3.2.7.-B<br>Waterproofing Termination With Cut Reglet''' || 2027-October-31 }}<br>{{hilite | Forming Part of Sentence 14.3.2.7.() || 2027-October-31 }}<br><small>(Click to expand illustration)</small>
 |-
-| [[File:SBS Figure 14.3.1.jpg|link=http://rpm.rcabc.org/images/5/5b/SBS_Figure_14.3.1.jpg | 450 px]]
+| [[File:Illustration Unavailable (Filler Image).png |class=img-responsive | link= | 500 px]]
 |}
+<li>{{hilite | Structural installations that do not incorporate pre-curbs must be || 2023-June-16 }}
-<li><span class="principles">Dowels (reinforcement bar) should be</span>
+<ol>
 <ol>
-<li><span class="principles">inserted into the pre‐curb after application of sheet membrane flashing</span>, and
+<li>inserted into the pre‐curb after application of the membrane flashing, and
-<li><span class="principles">waterproofed in their final position, where they penetrate the pre-curb</span>.
+<li>waterproofed in their final position, where they penetrate the pre-curb.
 </li></ol>
 <li>Dowels must be waterproofed with
 <ol>
-<li>a single application of an RGC-accepted reinforced 2-component liquid membrane flashing, or
+<li>a single application of an accepted, fleece-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</span>
+<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>When structures or equipment exceed the limits stated in [[Guarantee#3.2.1.2. Limitations and Exclusions of Guarantee | Division A, Article 3.2.1.2.]], a membrane integrity scan and any resulting repairs must be undertaken before the membrane is covered.
 </li></ol>

@@ Line 3,507: / Line 3,507: @@
 </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
+<li>Where cleats (“wind clips”) are required,
 <ol>
-<li>conform to the fabrication requirements in [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1.]], and
+<li>{{hilite | they shall|| 2027-October-31 }} conform to the fabrication requirements in [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1.]],
-<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>{{hilite | they may be fashioned with an upper leg that rests on the ''parapet'' coping (See '''Figure 13.3.2.3.-A''') but must not be fastened through the top leg, and || 2027-October-31}}
 </li></ol>
 <br>
@@ Line 3,516: / Line 3,517: @@
 |-
 |-
-| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.3.2.3.-A<br>General requirements for<br>cap flashing securement'''<br>Forming Part of Article 13.3.2.3.<br><small>(Click to expand illustration)</small>
+| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 13.3.2.3.-A<br>General requirements for<br>cap flashing securement''' || 2027-October-31 }}<br>{{hilite | Forming Part of Article 13.3.2.3. || 2026-October-31 }}<br><small>(Click to expand illustration)</small>
 |-
 | [[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]]

@@ Line 3,289: / Line 3,289: @@
 <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>must be at least {{hilite | 63.5 mm (2-1/2")|| 2027-October-31 }} in height, exclusive of the drip or hemmed edge, when measured between each break, and
-<li>and shall overlap the edge of a membrane (i.e., membrane flashing on a wall) by at least 25.4 mm (1”).
+<li>{{hilite | must overlap the terminated edge of roofing materials by at least|| 2027-October-31 }} 25.4 mm (1”).
 </ol></li>
 <br>
@@ Line 3,296: / Line 3,296: @@
 |-
 |-
-| colspan="1"; style="text-align:center;width:450px;" | '''Figure 13.2.2.1.-A Roof-side face of cap flashing<br>showing slotted hole for gasketed fastener'''<br>Forming Part of Article 13.2.2.1.<br><small>(Click to expand illustration)</small>
+| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 13.2.2.1.-A Roof-side face of cap flashing<br>showing slotted hole for gasketed fastener'''|| 2027-October-31 }}<br>Forming Part of Article 13.2.2.1.<br><small>(Click to expand illustration)</small>
 |-
 | [[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]]

@@ Line 3,165: / Line 3,165: @@
 <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><span class="recommended">''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</span>  (Ref. [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1.]] for fabrication requirements).
-<li><span class="recommended">Stainless steel flashings and fasteners are recommended for use in environments where significant corrosion may occur</span> (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><span class="recommended">{{hilite | Stainless steel flashings and fasteners are recommended for use in environments where significant corrosion may occur|| 2026-July-1 }}</span>{{hilite |  (e.g., near salt-water coastlines) (See || 2026-July-1 }} [[#13.2.1.2. Sheet Metal Grade and Gauge | {{hilite | Article 13.2.1.2.|| 2026-July-1 }}]] {{hilite |for stainless steel material requirements)|| 2026-July-1 }}.
 </li></ol>