Template:PERIMETER FLASHINGS - MEMBRANES (SBS) - Revision history

James Klassen at 21:10, 14 August 2026

2026-08-14T21:10:52Z

James Klassen at 22:59, 9 November 2018

2018-11-09T22:59:35Z

James Klassen: /* Cant Strips */

2018-03-02T16:24:41Z

‎Cant Strips

James Klassen: /* Sleepers and Roof Separation (Expansion and Control) Joints */

2018-02-16T21:45:25Z

‎Sleepers and Roof Separation (Expansion and Control) Joints

James Klassen: /* Built-in Membrane Gutters */

2017-10-18T22:29:53Z

‎Built-in Membrane Gutters

James Klassen: /* Wall Intersections */

2017-10-18T22:28:31Z

‎Wall Intersections

James Klassen: /* Wall Intersections */

2017-10-18T22:28:17Z

‎Wall Intersections

James Klassen: /* Parapets */

2017-10-18T22:27:49Z

‎Parapets

James Klassen: /* Vertical Surface Application and Termination */

2017-10-18T22:27:09Z

‎Vertical Surface Application and Termination

James Klassen: /* General */

2017-10-18T22:26:08Z

‎General

@@ Line 1: / Line 1: @@
 __NOTOC__
 === General ===
 Membrane flashing (stripping) details (with the exception of low parapets, cant strip edges and RoofStar-accepted door sill details) must be designed to provide a minimum 200 mm (8") sealed height above the finished roof surfacing. Surfacing is defined as the top of the roofing assembly, be it membrane, ballast or growing medium (soil). All membrane flashing (stripping) terminating on a vertical surface must be mechanically fastened.

@@ Line 9: / Line 9: @@
 ===Material Selection===
 See [[Flexible Membrane Roofing Systems: SBS|'''Accepted SBS Membranes''']] for '''''RoofStar Guaranteed''''' roof systems.
 ===Application===
@@ Line 33: / Line 32: @@
 :.4 '''Hot Asphalt Adhered''' - Install modified bituminous stripping (flashing) membranes to manufacturers&rsquo; installation specifications with conventional Type 3 or 4 oxidized asphalt or Type 3 or 4 SEBS modified asphalt. The asphalt temperature must conform to the membrane manufacturer's minimum application temperature and minimum +205&#176;C (+400&#176;F) as required by '''''RoofStar Guarantee Standards'''''.  Metal base flashing is required on all vertical surfaces, walls, curbs, etc. when hot asphalt is used to adhere stripping (flashing) membranes.
 ====Liquid Membranes====
@@ Line 40: / Line 37: @@
 Liquid membrane flashings are available as one or two part component systems that require reinforcement scrims for strength. To ensure quality installation, manufacturers&#8217; proprietary application instructions must be strictly followed.
 ====Curbs====
 Curbed openings (HVAC, skylights, etc.) must be a minimum height of 200 mm (8") and have at least one ply of membrane flashing (stripping) carried to the inside edge of the curb, or up under the built-in counter-flashing of pre-manufactured metal curbs (i.e. roof scuttles or HVAC) (see Detail '''[[SBS Details:D1.7.6-3 Curbs & Sleepers (Basic Curb)|D1.7.6-3 Curbs & Sleepers (Basic Curb)]]''').
 ====Parapets====
@@ Line 52: / Line 45: @@
 All cant edge and parapet wall details must have membrane flashing (stripping) that overlaps the exterior finish (i.e. wall cladding) by a minimum of 50 mm (2"). On high parapet walls, that are completely flashed with metal, where membrane flashing (stripping) is terminated part way up the wall the remainder of the parapet must be covered with a flashing underlay of a minimum 40 mils or 1 mm (.040") self-adhered modified bitumen membrane.  15-lb felt is not acceptable (see Detail '''[[SBS Details:D1.7.1-1 Assemblies (Insulated Conventional)|D1.7.1-1 Assemblies (Insulated Conventional)]]''').
 ====Wall Intersections====
@@ Line 61: / Line 53: @@
 <span class="principles">A reverse lap application method for base sheet and base sheet flashing (stripping), at roof up stand transitions, is permitted when self-adhered base sheet flashing is used as flame protection for wood surfaces. Use of the reverse lap method must be an acceptable application method to the membrane manufacturer.</span>
 ==== Cant Strips ====
@@ Line 75: / Line 66: @@
 Modified Bituminous Base Sheet pre-stripping ply required at all perimeters, upstands and penetrations.  Cap sheet stripping is required and must extend 150 mm (6") horizontally and 200 mm (8") vertically from the base of all upstands.
 ==== Sleepers and Roof Separation (Expansion and Control) Joints ====
@@ Line 89: / Line 79: @@
 {{hilite | Field splicing of proprietary elastomeric expansion joints is permitted only when made with a machine acceptable to the expansion joint manufacturer.  All other field splices are not permitted. || 2019-February-16 }}
 ==== Door Openings ====
@@ Line 100: / Line 89: @@
 *Overflow drains in that area must be installed a minimum 25 mm (1") lower in height than adjacent door sills.
 *{{hilite | When design or safety codes require minimal elevation changes between a low door sill and an outdoor walking surface (ref. BC Building Code, latest edition), the walking surface must be pavers placed on proprietary pedestals designed with a least 12.5 mm (1/2″) clearance between the finished roof surface and the paver. Alternatively, pea gravel may be used in place of pedestals, but must be installed above a dimple-style drainage board. || 2017-April-22 }}
 ==== Built-in Membrane Gutters ====

@@ Line 75: / Line 75: @@
 Modified Bituminous Base Sheet pre-stripping ply required at all perimeters, upstands and penetrations.  Cap sheet stripping is required and must extend 150 mm (6") horizontally and 200 mm (8") vertically from the base of all upstands.
-<div id="SBSEXPANSION"></div>
+<div id="SBSEXPANSION2"></div>
 ==== Sleepers and Roof Separation (Expansion and Control) Joints ====

@@ Line 80: / Line 80: @@
 Roof Separation Joints (Expansion and Control Joints, etc.) / Equipment Sleepers / Safety Anchor Piers (poured in place pads) that are completely sealed (enveloped) with membrane flashing (stripping) may be less than 200 mm (8") in height but must not be less than 100 mm (4") in height above the finished roof surface.
-Manufacturer’s proprietary roof expansion joint systems are acceptable for use when the systems are located a minimum of 200mm (8") above the finished roof surface and are completely sheathed (covered) with sloped metal flashing.
+{{hilite | Proprietary elastomeric expansion joint systems, manufactured with an EPDM-based core and flanges that can be fully bonded to the primary membrane, are acceptable for use in low-sloped membrane roof assemblies when the systems are located a minimum of 200mm (8") above the finished roof surface and are completely sheathed (covered) with sloped metal flashing.  Such joints must be || 2019-February-16 }}
 <div id="SBSDOOR"></div>

@@ Line 100: / Line 100: @@
 Membranes installed as a gutter liner must be fully adhered and mechanically fastened at terminations. The accepted flexible membrane roofing system must be installed to '''''RoofStar Guarantee Standards''''' and the manufacturer's printed instructions.
-Built in gutter membranes must extend up the roof slope to a point, which is 150 mm (6") <b>vertically</b> above the maximum water level of the gutter or outside parapet height (see [[ASM Details:E1.7.16 (Built-in Gutter Membrane / Underlayment / Vapour Barrier Transition)|'''Built-in gutters''']] and [[ASM Details:E1.7.17 (Built-in Gutter)|'''Detail E1.7.17''']])
+Built in gutter membranes must extend up the roof slope to a point, which is 150 mm (6") <b>vertically</b> above the maximum water level of the gutter or outside parapet height (see [[ASM Details:E1.7.16 (Built-in Gutter Membrane / Underlayment / Vapour Barrier Transition)|'''Detail E1.7.16''']] and [[ASM Details:E1.7.17 (Built-in Gutter)|'''Detail E1.7.17''']])
 {{hilite | Fasteners shall be installed 4” or more above the maximum water line, and gutters must include a scupper overflow drain. || 2017-April-22 }}

@@ Line 55: / Line 55: @@
 ====Wall Intersections====
-Where a parapet, cant or separation / expansion joint detail intersects with a higher wall; the membrane flashing (stripping) must be sealed by gussets (membrane saddles) that are formed to protect the inside and outside corners (see '''[[SBS Details:D1.7.2-4 Parapets & Copings (Parapet - Wall Transition)|D1.7.62-4 Parapets & Copings (Parapet - Wall Transition)]]''').
+Where a parapet, cant or separation / expansion joint detail intersects with a higher wall; the membrane flashing (stripping) must be sealed by gussets (membrane saddles) that are formed to protect the inside and outside corners (see '''[[SBS Details:D1.7.2-4 Parapets & Copings (Parapet - Wall Transition)|D1.7.2-4 Parapets & Copings (Parapet - Wall Transition)]]''').
 ====Sequencing====

@@ Line 51: / Line 51: @@
 Parapet walls may be less than 200 mm (8") in height, but not less than 87.7 mm (3½") in height.
-All cant edge and parapet wall details must have membrane flashing (stripping) that overlaps the exterior finish (i.e. wall cladding) by a minimum of 50 mm (2"). On high parapet walls, that are completely flashed with metal, where membrane flashing (stripping) is terminated part way up the wall the remainder of the parapet must be covered with a flashing underlay of a minimum 40 mils or 1 mm (.040") self-adhered modified bitumen membrane.  15-lb felt is not acceptable (see Detail '''[[SBS Details:D1.7.1 Assemblies (Insulated Conventional)|D1.7.1 Assemblies (Insulated Conventional)]]''').
+All cant edge and parapet wall details must have membrane flashing (stripping) that overlaps the exterior finish (i.e. wall cladding) by a minimum of 50 mm (2"). On high parapet walls, that are completely flashed with metal, where membrane flashing (stripping) is terminated part way up the wall the remainder of the parapet must be covered with a flashing underlay of a minimum 40 mils or 1 mm (.040") self-adhered modified bitumen membrane.  15-lb felt is not acceptable (see Detail '''[[SBS Details:D1.7.1-1 Assemblies (Insulated Conventional)|D1.7.1-1 Assemblies (Insulated Conventional)]]''').
 <div id="SBSWALLTIEIN"></div>

@@ Line 19: / Line 19: @@
 All membrane flashing (stripping) terminating at cladded (i.e. stucco, siding, etc.) walls must lap under the sheathing membrane and cladding by minimum of 75 mm (3").
-All membrane flashing (stripping) terminating under a reglet must be sealed to the wall with a compatible mastic (see '''[[SBS Details:D1.7.9 Counter-flashings & Reglets (Deck - Wall Supported)|D1.7.9 Counter-flashings & Reglets (Deck - Wall Supported)]]''' et al).
+All membrane flashing (stripping) terminating under a reglet must be sealed to the wall with a compatible mastic (see '''[[SBS Details:D1.7.4-1 Counter-flashings & Reglets (Deck - Wall Supported)|D1.7.4-1 Counter-flashings & Reglets (Deck - Wall Supported)]]''' et al).
 ====='''Wood Surfaces'''=====

@@ Line 5: / Line 5: @@
 If no published instructions are available, specific instructions in writing from the manufacturer must be obtained and filed with the '''''RoofStar Guarantee Program''''' before project start-up.
-<p class="principles">The roof system must be designed in keeping with assemblies tested to and compliant with [[RoofStar Guarantee Standards for SBS Roof Systems#SBS4| '''CSA A123.21''']] (latest edition), and include a calculation for the building wind load requirements using the [http://archive.nrc-cnrc.gc.ca/eng/projects/irc/calculator.html '''Wind-RCI calculator'''].</p>
+<p class="principles">The roof system must be designed in keeping with assemblies tested to and compliant with [[RoofStar Guarantee Standards for SBS Modified Bitumen Roof Assemblies#SBS4| '''CSA A123.21''']] (latest edition), and include a calculation for the building wind load requirements using the [http://archive.nrc-cnrc.gc.ca/eng/projects/irc/calculator.html '''Wind-RCI calculator'''].</p>
 ===Material Selection===