SBS Roof Systems Standard - Revision history

James Klassen: /* 13.1.3.4. Gauge, Dimension Limitations, and Seams */

2026-08-05T22:25:00Z

‎13.1.3.4. Gauge, Dimension Limitations, and Seams

James Klassen: /* 10.3.2.3. General Application Requirements for Perimeters and Walls */

2026-07-31T22:34:14Z

‎10.3.2.3. General Application Requirements for Perimeters and Walls

James Klassen at 18:34, 26 June 2026

2026-06-26T18:34:49Z

Show changes

James Klassen: /* 3.1.3.2. Calculation of Specified Wind Loads */

2026-04-10T20:57:02Z

‎3.1.3.2. Calculation of Specified Wind Loads

James Klassen: /* 3.1.3.2. Calculation of Specified Wind Loads */

2026-03-31T16:35:11Z

‎3.1.3.2. Calculation of Specified Wind Loads

James Klassen: /* 10.3.2.3. General Application Requirements for Perimeters and Walls */

2026-02-27T19:30:06Z

‎10.3.2.3. General Application Requirements for Perimeters and Walls

James Klassen at 18:10, 30 January 2026

2026-01-30T18:10:12Z

James Klassen: /* 11.1.1.2. {{strike| Definitions || 2024-October-23 }}{{hilite | Defined Terms || 2025-October-25 }} */

2025-11-26T18:04:01Z

‎11.1.1.2. {{strike| Definitions || 2024-October-23 }}{{hilite | Defined Terms || 2025-October-25 }}

James Klassen at 22:07, 31 October 2025

2025-10-31T22:07:35Z

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James Klassen: /* 3.1.2.2. RoofStar 15-Year Guarantee */

2025-08-22T18:42:09Z

‎3.1.2.2. RoofStar 15-Year Guarantee

@@ Line 4,028: / Line 4,028: @@
 |-
 |-
-| colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-A<br>Membrane Termination on Wall<br>Option 1'''<br>Forming Part of<br>Clause 10.3.2.3.(11)(1)(1)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-B<br>Membrane Termination on Wall<br>Option 2'''<br>Forming Part of<br>Clause 10.3.2.3.(11)(2)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-C<br>Membrane Termination on Wall<br>Option 3'''<br>Forming Part of<br>Clause 10.3.2.3.(11)(3)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-D<br>Membrane Termination on Wall<br>Option 4'''<br>Forming Part of<br>Clause 10.3.2.3.(11)(4)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-E<br>Membrane Termination on Wall<br>Option 5'''<br>Forming Part of<br>Clause 10.3.2.3.(11)(5)<br><small>(Click to expand)</small> || 2025-October-25 }}
+| colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-A<br>Membrane Termination on Wall<br>Option 1'''<br>Forming Part of<br>Clause 10.3.2.3.(11)(1)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-B<br>Membrane Termination on Wall<br>Option 2'''<br>Forming Part of<br>Clause 10.3.2.3.(11)(2)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-C<br>Membrane Termination on Wall<br>Option 3'''<br>Forming Part of<br>Clause 10.3.2.3.(11)(3)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-D<br>Membrane Termination on Wall<br>Option 4'''<br>Forming Part of<br>Clause 10.3.2.3.(11)(4)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-E<br>Membrane Termination on Wall<br>Option 5'''<br>Forming Part of<br>Clause 10.3.2.3.(11)(5)<br><small>(Click to expand)</small> || 2025-October-25 }}
 |-
 | [[File:SBS Figure 10.3.2.-A.png | link=https://rpm.rcabc.org/images/7/73/SBS_Figure_10.3.2.-A.png | 200 px]] || [[File:SBS Figure 10.3.2.-B.png | link=https://rpm.rcabc.org/images/7/7d/SBS_Figure_10.3.2.-B.png | 200 px]] || [[File:SBS Figure 10.3.2.-C.png | link=https://rpm.rcabc.org/images/a/a1/SBS_Figure_10.3.2.-C.png | 200 px]] || [[File:SBS Figure 10.3.2.-D.png | link=https://rpm.rcabc.org/images/3/35/SBS_Figure_10.3.2.-D.png | 200 px]] || [[File:SBS Figure 10.3.2.-E.png | link=https://rpm.rcabc.org/images/6/6a/SBS_Figure_10.3.2.-E.png | 200 px]]
@@ Line 4,407: / Line 4,407: @@
 |-
 |-
-| colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.8.2.-A<br>Membrane Pre-Flashing<br>Step 1'''<br>Forming Part of<br>Sentence 10.3.8.2.(1)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.8.2.-B<br>Membrane Pre-Flashing<br>Step 2'''<br>Forming Part of<br>Sentence 10.3.8.2.(3)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-C<br>Membrane Pre-Flashing<br>Step 3'''<br>Forming Part of<br>Sentence 10.3.8.2.(4)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-D<br>Membrane Pre-Flashing<br>Step 4'''<br>Forming Part of<br>Sentence 10.3.8.2.(5)<br><small>(Click to expand)</small> || 2025-October-25 }}
+| colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.8.2.-A<br>Membrane Pre-Flashing<br>Step 1'''<br>Forming Part of<br>Sentence 10.3.8.2.(1)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.8.2.-B<br>Membrane Pre-Flashing<br>Step 2'''<br>Forming Part of<br>Sentence 10.3.8.2.(3)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.8.2.-C<br>Membrane Pre-Flashing<br>Step 3'''<br>Forming Part of<br>Sentence 10.3.8.2.(4)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.8.2.-D<br>Membrane Pre-Flashing<br>Step 4'''<br>Forming Part of<br>Sentence 10.3.8.2.(5)<br><small>(Click to expand)</small> || 2025-October-25 }}
 |-
 | [[File:SBS Figure 10.3.8.-A.png | link=https://rpm.rcabc.org/images/4/44/SBS_Figure_10.3.8.-A.png | 250 px]] || [[File:SBS Figure 10.3.8.-B.png | link=https://rpm.rcabc.org/images/f/f3/SBS_Figure_10.3.8.-B.png | 250 px]] || [[File:SBS Figure 10.3.8.-C.png | link=https://rpm.rcabc.org/images/6/67/SBS_Figure_10.3.8.-C.png  | 250 px]] || [[File:SBS Figure 10.3.8.-D.png | link=https://rpm.rcabc.org/images/0/00/SBS_Figure_10.3.8.-D.png | 250 px]]
@@ Line 5,765: / Line 5,765: @@
 |  22+ || Butt Seams*
 |-
-|  rowspan="2" style="vertical-align:centre;text-align:center;"   | {{hilite | Up to 304.8 mm (12") || 2026-October-31 }} || rowspan="2" style="vertical-align:centre;text-align:center;"   | {{hilite | 2% || 2026-October-31 }} || 24 || rowspan="6" style="vertical-align:centre;text-align:center;"   | {{hilite | 3048 mm (12"),<br>as specified by a<br>''registered professional'' || 2026-October-31 }} || {{hilite | S-lock or Standing Seam<sup>†</sup> || 2026-October-31 }}
+|  rowspan="2" style="vertical-align:centre;text-align:center;"   | {{hilite | Up to 304.8 mm (12") || 2026-October-31 }} || rowspan="2" style="vertical-align:centre;text-align:center;"   | {{hilite | 2% || 2026-October-31 }} || 24 || rowspan="6" style="vertical-align:centre;text-align:center;"   | {{hilite | 3048 mm (120"),<br>as specified by a<br>''registered professional'' || 2026-October-31 }} || {{hilite | S-lock or Standing Seam<sup>†</sup> || 2026-October-31 }}
 |-
 |  22+ || {{hilite | Butt Seams* || 2026-October-31 }}

@@ Line 3,994: / Line 3,994: @@
 <li>{{hilite |When sheet membrane flashing is terminated on a vertical surface, it must be secured at its upper termination using|| 2021-October-30 }}
 <ol>
-<li>{{hilite | '''Option 1''' ({{hilite | '''Figure 10.3.2.3.-A''' || 2025-October-25 }}), in which the upper edges of fully adhered sheet membrane flashing plies shall be protected and secured with overlapping adhered or self-adhered ''wall'' membranes and exterior sheathing|| 2021-October-30 }},
+<li>{{hilite | '''Option 1''' ({{hilite | '''Figure 10.3.2.3.-A''' || 2025-October-25 }}), in which the upper edges of fully adhered sheet membrane flashing plies shall be protected and secured with overlapping adhered or self-adhered ''wall'' membranes and exterior cladding{{strike| sheathing || 2026-July-31 }}|| 2021-October-30 }},
 <li>'''Option 2''' ({{hilite | '''Figure 10.3.2.3.-B''' || 2025-October-25 }}), where the upper edges of fully adhered sheet membrane flashing plies must be {{hilite |sealed, and mechanically secured to the wall substrate, with a RoofStar-accepted reinforced <u>2-component</u> catalyzed polymethyl methacrylate (PMMA) liquid membrane flashing (Ref. [[#10.3.3.4. Liquid Membrane Flashing | Article 10.3.3.4., "Liquid Membrane Flashing"]])|| 2021-October-30 }},
 <li>{{hilite | '''Option 3''' ({{hilite | '''Figure 10.3.2.3.-C''' || 2025-October-25 }}), where|| 2021-October-30 }}
@@ Line 6,036: / Line 6,036: @@
 <li>{{hilite | into or through plywood so that screw threads engage its full thickness, excluding the unthreaded tip, and || 2024-January-31 }}
 <li>{{hilite | into solid substrate (i.e., dimensional lumber or concrete) at least 25.4 mm (1"), and || 2024-January-31 }}
 <li>must be installed at least 88.9 mm (3-1/2") above the ''finished system surface''.
 </li></ol>
 {{strike| <li>Where hidden metal clips are required, they must

@@ Line 1,060: / Line 1,060: @@
 <li>A ''registered professional'' "skilled in the work concerned" must perform or validate the calculation of ''Specified Wind Loads'' (See the "British Columbia Building Code 2024", Division C, Part 2, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=836 Article 2.2.1.2., "Structural Design"]), using
 <ol>
-<li>the [https://nrc.canada.ca/en/research-development/products-services/software-applications/wind-load-calculators-roof-cladding-vegetated-roof-assembly "Wind Uplift Resistance Calculator"] (formerly "Wind-RCI"), or
+<li>the [https://nrc.canada.ca/en/research-development/products-services/software-applications/wind-roof-calculators-internet-wind-rci Wind-Roof Calculators on the Internet (Wind-RCI)], or
 <li>the formulae and procedures in the "British Columbia Building Code 2024", Division B, Part 4, [https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/construction-industry/building-codes-and-standards/revisions-and-mo/bcbc_2024.pdf#page=529 Subsection 4.1.7.,"Wind Load"] (See [[Notes to SBS Standard#A-3.1.1.1. | Note A-3.1.1.1.]]).
 </li></ol>
@@ Line 3,718: / Line 3,718: @@
 <li>When a {{strike| ''roof system'' transitions to a ''wall'' greater than 609.6 mm (24") in height (a "High Wall"), and the ''wall'' || 2023-January-26 }} {{hilite | ''parapet'' higher than 609.6 mm (24") (a ''tall parapet'') || 2024-January-31 }} is specified as part of the ''Contractor’s'' scope of work,
 <ol>
-<li>membranes {{strike| or water-resistive barrier materials || 2023-January-26 }} specified for {{strike| ''walls'' || 2023-January-26 }} {{hilite | {{strike| the vertical || 2023-June-15 }} surfaces of the ''wall'' above the primary roof membrane flashing {{hilite | and including the coping, || 2024-June-15 }} must conform to the requirements in || 2024-January-31 }}[[#10.2.1.1. Flashing Membranes | Article 10.2.1.1.]]{{strike| must be compatible with the roof membrane|| 2023-January-26 }}, and
+<li>membranes {{strike| or water-resistive barrier materials || 2023-January-26 }} specified for {{strike| ''walls'' || 2023-January-26 }} {{hilite | {{strike| the vertical || 2023-June-15 }}all surfaces of the ''wall'' above the primary roof membrane flashing, {{hilite | including the coping, || 2024-June-15 }} must conform to the requirements in || 2024-January-31 }}[[#10.2.1.1. Flashing Membranes | Article 10.2.1.1.]]{{strike| must be compatible with the roof membrane|| 2023-January-26 }}, 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>
@@ Line 4,147: / Line 4,147: @@
 </li></ol>
 <li>{{hilite | Regardless of ''parapet'' height, no fewer than two plies of sheet membrane flashing shall be carried up the inside face of the ''parapet'' at least 203.2 mm (8") above the ''finished roof system surface''. || 2023-October-28 }}
-<li>{{strike| ''Tall parapets'' || 2022-October-28 }} {{hilite | A ''tall parapet'' (taller than 609.6 mm (24”), {{hilite | nominal || 2024-January-31 }}) || 2023-October-28 }}
+<li>{{strike| ''Tall parapets'' || 2022-October-28 }} {{hilite | A ''tall parapet'' (taller than 609.6 mm (24”) {{hilite | nominal || 2024-January-31 }}) || 2023-October-28 }} {{hilite | shall be waterproofed || 2023-October-28 }} in keeping with the requirements in [[#10.3.4.3. Tall Parapets | Article 10.3.4.3.]]
-<ol>
+{{strike| {{hilite | must be waterproofed with at least one ply of base sheet membrane flashing applied continuously across the top face, extending down both the inside surface and the exterior face of the ''parapet'' by at least 50.8 mm (2”), as required in || 2023-October-28 }} [[#10.3.2.3. General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]] || 2026-April-8 }}
-<li>{{hilite | shall be waterproofed || 2023-October-28 }} in keeping with the requirements in [[#10.3.4.3. Tall Parapets | Article 10.3.4.3.]], and
 <li>Where a ''parapet'' intersects with a higher wall, water must be directed {{strike| to the outer surface of the ''wall'' || 2025-October-22 }} {{hilite | away from the union and onto the roof surface (See '''Figures 10.3.4.1.-C''' '''through 10.3.4.1.-K''', below) by flashing the union with || 2026-October-31 }}
 <ol>
@@ Line 4,222: / Line 4,220: @@
 <li>must be applied with the methodology prescribed by the ''manufacturer'',
 <li>shall positively overlap the primary sheet membrane flashing by at least 50.8 mm (2”),
-<li>shall underlap {{strike| the roof || 2023-June-15 }} sheet membrane flashing installed to cover the top of a parapet by at least 50.8 mm (2"), {{hilite | and || 2024-June-15 }}
+<li>shall underlap {{strike| the roof || 2023-June-15 }} sheet membrane flashing installed to cover the top of a parapet by at least 50.8 mm (2"),
-{{strike| {{hilite | may be used to waterproof the coping of a ''tall parapet'' || 2024-January-31 }} {{strike| shall not be used to cover the top surface of a ''parapet'' || 2023-January-26 }}, and || 2023-June-15 }}
+<li>{{hilite | may be used to waterproof the coping of a ''tall parapet'',|| 2024-January-31 }} {{strike| shall not be used to cover the top surface of a ''parapet'' || 2023-January-26 }} and
 <li>shall be protected from UV radiation with a metal flashing, cladding or another wall covering.
 </li></ol>

@@ Line 295: / Line 295: @@
 <li>''overburden'', amenities, or equipment exceed 152.4 mm (6”) in depth {{strike| (see Figure 1.1.3-A) || 2024-October-24 }}.
 </li></ol>
-<li>{{hilite | When the ''roof assembly'' supports a ''vegetated roof system'' covered by a '''''RoofStar Guarantee''''' an electrical current membrane integrity test is optional (not required)  || 2025-October-25 }}<span class="recommended">{{hilite | but recommended || 2025-October-25 }}</span>.{{hilite | An electrical current membrane integrity test is required immediately prior to the installation of a ''vegetated roof system'' || 2025-October-25 }}.
+<li>{{hilite | When the ''roof assembly'' supports a ''vegetated roof system'' covered by a '''''RoofStar Guarantee''''',|| 2025-October-25 }} <span class="recommended">{{hilite | an electrical current membrane integrity test is recommended but is not required|| 2025-October-25 }}</span>; {{hilite | however, when an integrity test is specified by the ''Design Authority'', it must be carried out immediately prior to the installation of a ''vegetated roof system'' || 2025-October-25 }}.
 <li>An electrical current membrane integrity test must be performed by an RGC-recognized service provider {{hilite | listed in [[Division_C | Division C]]|| 2021-October-30 }}.
 <li>Flood testing employed as a secondary or alternative membrane integrity test <span class="recommended">is strongly discouraged for ''conventionally insulated roof systems'' because of the risk of extensive damage to ''system'' components or the building interior</span>, and is best suited for ''protected roof systems'' (See [[Notes to SBS Standard#A-1.1.3.3.(5) Flood Testing | Note A-1.1.3.3.(5)]]).
@@ Line 1,100: / Line 1,100: @@
 <li>Mansards are a ''roof system'' and are therefore subject to the requirements in this Part.
 <li>Securement of an adjoining ''water-shedding system'' shall be made in accordance with the requirements in the applicable Standard.
-<li>{{hilite | Wind loads for a ''roof assembly'' supporting a ''vegetated roof system'' shall be determined in accordance with the requirements of the Building Code and || 2025-October-25 }} [https://rpm.rcabc.org/index.php?title=VRA_Standard#3.1.3.3. Resistance to Specified Wind Loads | Article 3.1.3.3.]] {{hilite | of the “RGC Standard for Vegetated Roofs”|| 2025-October-25 }}.
+<li>{{hilite | Wind loads for a ''roof assembly'' supporting a ''vegetated roof system'' shall be determined in accordance with the requirements of the Building Code and || 2025-October-25 }} [https://rpm.rcabc.org/index.php?title=VRA_Standard#3.1.3.3._Resistance_to_Specified_Wind_Loads Article 3.1.3.3.] {{hilite | of the “RGC Standard for Vegetated Roofs”|| 2025-October-25 }}.
 {{strike| <li>''Vegetated Roof Systems'' specified for || 2024-October-24 }}
 <ol>
@@ Line 3,288: / Line 3,288: @@
 <li>{{hilite | A properly secured, accepted overlay board is required || 2023-June-16 }} (Ref. [[#Part 5 - Deck and Wall Overlays | Part 5]])
 <ol>
-<li>{{hilite | for any ''deck'' that does not meet the deck fastening criteria set out in || 2023-June-16 }} [[#2.1.5.3. All Wood Roof Decks | Article 2.1.5.3.]],
+<li>{{hilite | for any ''deck'' that does not meet the deck fastening criteria set out in || 2023-June-16 }} [[#2.1.5.3. All Wood Roof Decks | Article 2.1.5.3.]], and
-<li>{{hilite | for any ''deck'' that cannot be repaired or otherwise made suitable for roofing, || 2023-June-16 }} and
+<li>{{hilite | for any ''deck'' that cannot be repaired or otherwise made suitable for roofing. || 2023-June-16 }}
 </li></ol>
 <li>{{hilite | Substrates must be primed, if required by the ''manufacturer''. || 2023-June-16 }}
@@ Line 3,307: / Line 3,306: @@
 <li>mechanically fastened or loose-laid membranes.
 </li></ol>
 <li>If surface drying is required prior to roofing, the ''deck'' must be dried with blown air.
 </li></ol>

@@ Line 3,322: / Line 3,322: @@
 <li><span class="principles">Membranes should be installed beginning at the lowest point of the roof</span>.
 <li>All membrane openings at eaves, walls, vents, etc. must be sealed during application to prevent moisture from entering the ''roof system'' or between membrane flashing plies.
 <li>Except for the application of picture-framing techniques (see [[#10.3.8. Alternative Approaches to Sheet Membrane Flashing | Sub-section 10.3.8., "Alternative Approaches to Sheet Membrane Flashing"]]), both the base and cap membranes must be installed in a parallel direction (not perpendicular to each other).
 <li>Both the base and cap membranes of a 2-ply un-granulated (smooth) membrane ''system'' must be installed separately; installation "shingle fashion" (i.e., 50% lap) is not acceptable except where membrane "back nailing" is required.
@@ Line 4,028: / Line 4,027: @@
 |-
 |-
-| colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-A<br>Membrane Termination on Wall<br>Option 1'''<br>Forming Part of<br>Clause 10.3.2.3.(9)(1)(1)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-B<br>Membrane Termination on Wall<br>Option 2'''<br>Forming Part of<br>Clause 10.3.2.3.(9)(2)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-C<br>Membrane Termination on Wall<br>Option 3'''<br>Forming Part of<br>Clause 10.3.2.3.(9)(3)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-D<br>Membrane Termination on Wall<br>Option 4'''<br>Forming Part of<br>Clause 10.3.2.3.(9)(4)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-E<br>Membrane Termination on Wall<br>Option 5'''<br>Forming Part of<br>Clause 10.3.2.3.(9)(5)<br><small>(Click to expand)</small> || 2025-October-25 }}
+| colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-A<br>Membrane Termination on Wall<br>Option 1'''<br>Forming Part of<br>Clause 10.3.2.3.(11)(1)(1)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-B<br>Membrane Termination on Wall<br>Option 2'''<br>Forming Part of<br>Clause 10.3.2.3.(11)(2)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-C<br>Membrane Termination on Wall<br>Option 3'''<br>Forming Part of<br>Clause 10.3.2.3.(11)(3)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-D<br>Membrane Termination on Wall<br>Option 4'''<br>Forming Part of<br>Clause 10.3.2.3.(11)(4)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:255px;" | {{hilite | '''Figure 10.3.2.3.-E<br>Membrane Termination on Wall<br>Option 5'''<br>Forming Part of<br>Clause 10.3.2.3.(11)(5)<br><small>(Click to expand)</small> || 2025-October-25 }}
 |-
 | [[File:SBS Figure 10.3.2.-A.png | link=https://rpm.rcabc.org/images/7/73/SBS_Figure_10.3.2.-A.png | 200 px]] || [[File:SBS Figure 10.3.2.-B.png | link=https://rpm.rcabc.org/images/7/7d/SBS_Figure_10.3.2.-B.png | 200 px]] || [[File:SBS Figure 10.3.2.-C.png | link=https://rpm.rcabc.org/images/a/a1/SBS_Figure_10.3.2.-C.png | 200 px]] || [[File:SBS Figure 10.3.2.-D.png | link=https://rpm.rcabc.org/images/3/35/SBS_Figure_10.3.2.-D.png | 200 px]] || [[File:SBS Figure 10.3.2.-E.png | link=https://rpm.rcabc.org/images/6/6a/SBS_Figure_10.3.2.-E.png | 200 px]]
@@ Line 6,070: / Line 6,069: @@
 <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>{{hilite | '''Straight (linear) joints''' between lengths of ''linear metal flashing'' must be fully seamed using only an S-lock ({{hilite | '''Figure 13.3.2.2.-A'''|| 2025-October-25 }}) or Standing Seam ({{hilite | '''Figure 13.3.2.2.-B'''|| 2025-October-25 }}), but this requirement does not apply to|| 2021-October-30 }}
+<li>{{hilite | '''Straight (linear) joints''' between lengths of ''linear metal flashing'' must be fully seamed using only a Standing Seam ({{hilite | '''Figure 13.3.2.2.-A'''|| 2025-October-25 }}) or S-lock ({{hilite | '''Figures 13.3.2.2.-B''' and '''C'''|| 2025-October-25 }}), but this requirement does not apply to|| 2021-October-30 }}
 <ol>
 <li>{{hilite | flashing fashioned from 22-gauge metal (or heavier)|| 2021-October-30 }}, or
@@ Line 6,115: / Line 6,114: @@
 <br>
-::{|
+{|
 |-
-| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''{{hilite | Figure 13.3.2.2.-A || 2026-October-31 }} Standing Seam'''<br>Forming Part of Sentence 13.3.2.2.(5)<br><small>(Click to expand illustration)</small> || 2025-October-25 }}
+| colspan="1"; style="text-align:center;width:600px;" | {{hilite | '''{{hilite | Figure 13.3.2.2.-A || 2026-October-31 }} Standing Seam'''<br>Forming Part of Sentence 13.3.2.2.(5)<br><small>(Click to expand illustration)</small> || 2025-October-25 }}
 |-
 | [[File:MF - Standing Seam.png | link=https://rpm.rcabc.org/images/a/a3/MF_-_Standing_Seam.png | 500 px]]
 |}
+<br>
-<li>'''S-locked seams''' {{hilite | (See '''Figure 13.3.2.2.-B''')|| 2026-October-31 }} 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.
+<li>'''S-locked seams''' {{hilite | (See '''Figure 13.3.2.2.-B''' and '''Figure 13.3.2.2.-C''')|| 2026-October-31 }} 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.
 <br>
 <br>
-::{|
 |-
 |-
-| colspan="1"; style="text-align:center;width:450px;" | {{hilite | {{hilite | '''Figure 13.3.2.2.-B S-Lock, Double''' || 2026-October-31 }}<br>Forming Part of Sentence 13.3.2.2.(11)<br><small>(Click to expand illustration)</small> || 2025-October-25 }}
+| colspan="1"; style="text-align:center;width:600px;" | {{hilite | '''Figure 13.3.2.2.-B S-Lock, Single'''|| 2026-October-31 }}<br>Forming Part of Sentence 13.3.2.2.(11)<br><small>(Click to expand illustration)</small> || colspan="1"; style="text-align:center;width:600px;" | {{hilite | '''Figure 13.3.2.2.-C S-Lock, Double'''|| 2026-October-31 }}<br>Forming Part of Sentence 13.3.2.2.(11)<br><small>(Click to expand illustration)</small>
 |-
-| [[File:MF - S-Lock, Double.png | link=https://rpm.rcabc.org/images/b/b6/MF_-_S-Lock%2C_Double.png | 500 px]]
+| [[File:MF - S-Lock, Single.png | link=https://rpm.rcabc.org/images/0/09/MF_-_S-Lock%2C_Single.png | 500 px]] || [[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''' {{hilite | (See '''Figures 13.3.2.2.-C''' and '''13.3.2.2.-D''') || 2026-October-31 }}
@@ Line 6,142: / Line 6,143: @@
 |-
 |-
-| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 13.3.2.2.-C Flat butt seams''' || 2026-October-31 }}<br>{{hilite | Forming Part of Article 13.3.2.2. || 2026-October-31 }}<br><small>(Click to expand illustration)</small>
+| colspan="1"; style="text-align:center;width:600px;" | {{hilite | '''Figure 13.3.2.2.-C Flat butt seams''' || 2026-October-31 }}<br>{{hilite | Forming Part of Article 13.3.2.2. || 2026-October-31 }}<br><small>(Click to expand illustration)</small>
 |-
 | [[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]]
@@ Line 6,150: / Line 6,151: @@
 |-
 |-
-| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 13.3.2.2.-D Flat butt seams''' || 2026-October-31 }}<br>{{hilite | Forming Part of Article 13.3.2.2. || 2026-October-31 }}<br><small>(Click to expand illustration)</small>
+| colspan="1"; style="text-align:center;width:600px;" | {{hilite | '''Figure 13.3.2.2.-D Flat butt seams''' || 2026-October-31 }}<br>{{hilite | Forming Part of Article 13.3.2.2. || 2026-October-31 }}<br><small>(Click to expand illustration)</small>
 |-
 | [[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]]
@@ Line 6,190: / Line 6,191: @@
 <li>Where cleats (“wind clips”) are required, they must
 <ol>
-<li>{{hilite | conform to the fabrication requirements in || 2026-October-31 }} [[#13.2.2.1. Fabrication of Flashing | {{hilite | Article 13.2.2.1.|| 2026-October-31 }}]]{{hilite | , and || 2026-October-31}}
+<li>{{hilite | conform to the fabrication requirements in [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1.]], and || 2026-October-31}}
 <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") || 2026-October-31 }} from the bottom edge (hook).
 </li></ol>

@@ Line 79: / Line 79: @@
 <div style="text-align:center">
 '''First Edition''': June 14, 2018
-<br>'''Previous Edition''': June 12, 2025
+<br>'''Previous Edition''': November 1, 2025
-<br>'''Current Edition''': Adopted October 24, 2025
+<br>'''Current Edition''': Adopted January 20, 2026
 <br><br>
-All changes to this Standard are effective<br><big>'''November 1, 2025'''</big>
+All changes to this Standard are effective<br><big>'''February 1, 2026'''</big>
 </div>
 <div style="text-align:center">
@@ Line 155: / Line 155: @@
 ===={{hilite | 1.1.1.8. Pre-Design Requirements || 2025-October-25 }}====
 <ol>
-<li>The ''Coordinating Registered Professional'' is responsible to ensure that the ''roof assembly'' design 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 ''roof assembly''.
+<li>When a ''project'' is designed by an architectural or consulting firm (typically, this applies only to "new construction" ''projects''), the ''Coordinating Registered Professional'' is responsible to ensure that the ''roof assembly'' design 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 ''roof assembly''.
 </li></ol>
@@ Line 410: / Line 411: @@
 <ol>
-<li>{{hilite | Recovering (installing a new ''membrane system'' over an in-service || 2026-October-31 }}{{strike| existing || 2025-October-22 }} {{hilite | ''membrane system'') || 2026-October-31 }} <span class="recommended">{{hilite | is not a recommended practice and wiull limit the scope of coverage under the || 2026-October-31 }}</span> {{hilite | '''''RoofStar Guarantee''''', but it is acceptable to the '''''Guarantor''''' only when the following conditions, in addition to any other applicable requirements published in this Article or in Article 1.3.3.4., have been satisfied || 2026-October-31 }}:
+<li>{{hilite | Recovering (installing a new ''membrane system'' over an in-service || 2026-October-31 }}{{strike| existing || 2025-October-22 }} {{hilite | ''membrane system'') || 2026-October-31 }} <span class="recommended">{{hilite | is not a recommended practice and will limit the scope of coverage under the || 2026-October-31 }}</span> {{hilite | '''''RoofStar Guarantee''''', but it is acceptable to the '''''Guarantor''''' only when the following conditions, in addition to any other applicable requirements published in this Article or in Article 1.3.3.4., have been satisfied || 2026-October-31 }}:
 <ol>
 <li>{{hilite | the in-service roof has never before been recovered (recovering is not permitted over a previously recovered ''roof system'') || 2026-October-31 }},
@@ Line 2,243: / Line 2,244: @@
 </li></ol>
-====7.1.3.4. Effective Thermal Resistance and Layering====
+====7.1.3.4. {{strike| Effective || 2026-January-31 }} {{hilite | Thermal Resistance and Layering|| 2027-February-1 }}====
 (See [[Notes to SBS Standard#A-7.1.3.4.| {{hilite | Note A-7.1.3.4.|| 2025-October-25 }}]])
@@ Line 2,478: / Line 2,479: @@
 ===={{hilite | 7.2.2.5. Spray Foam Insulation || 2026-October-31 }}====
 <ol>
 <li>{{hilite | Closed-cell Spray Foam insulation (medium density) shall conform to either CAN/ULC-S705.1, "STANDARD FOR THERMAL INSULATION – SPRAY APPLIED RIGID POLYURETHANE FOAM, MEDIUM DENSITY – MATERIAL SPECIFICATION" (latest edition) or CAN/ULC-S711.1, “STANDARD FOR BEAD-APPLIED TWO COMPONENT POLYURETHANE AIR SEALANT FOAM, PART 1: MATERIAL SPECIFICATION” (latest edition) (Note: the applicable standard
 depends on the application) and may, when appropriate, serve as a vapour retarder or sealant || 2026-October-31 }}.
-<li>{{hilite | Open-cell Spray Foam insulation (low-density and commonly purchased off-the-shelf) shall conform to CAN/ULC S710.1, “STANDARD FOR BEAD-APPLIED ONE COMPONENT POLYURETHANE AIR SEALANT FOAM, PART 1: MATERIAL SPECIFICATION” (latest edition) and is permissible only for filling gaps larger than 6.35 mm (1/4") between insulation panels or around penetrations, when the insulation assembly is offset and staggered in keeping with Article 7.3.2.2.; it is not suitable for, and may not be used to, reseal (repair) a breach in the air or vapour control layers || 2026-October-31 }}.
+<li>{{hilite | Open-cell Spray Foam insulation (low-density and commonly purchased off-the-shelf) shall conform to CAN/ULC S710.1, “STANDARD FOR BEAD-APPLIED ONE COMPONENT POLYURETHANE AIR SEALANT FOAM, PART 1: MATERIAL SPECIFICATION” (latest edition) and is permissible only for filling {{hilite | minor gaps|| 2027-February-1 }} {{strike| larger than 6.35 mm (1/4")|| 2026-January-31 }} between insulation panels or around penetrations, when the insulation assembly is offset and staggered in keeping with|| 2027-February-1 }} [[#7.3.2.2. Alignment, Sizing, and Support | {{hilite | Article 7.3.2.2.|| 2027-February-1 }}]]{{hilite |; it is not suitable for, and may not be used to, reseal (repair) a breach in the air or vapour control layers|| 2026-October-31 }}.
 </li></ol>
@@ Line 2,547: / Line 2,549: @@
 | [[File:Figure 7.3.2.-B (Generic conv.).jpg|link=https://rpm.rcabc.org/images/e/ed/Figure_7.3.2.-B_%28Generic_conv.%29.jpg | 600 px]]
 |}
-<li>{{hilite | Where penetrations or their flashings pass through an insulation system, any voids larger than 6.35 mm (1/4") around them must be insulated with a spray foam insulation conforming to the material requirements in || 2026-October-31 }} [[#7.2.2.5. Spray Foam Insulation | {{hilite | Article 7.2.2.5. || 2026-October-31 }}]]{{hilite | , to reduce the potential for condensation || 2026-October-31 }}.
+<li>{{hilite | Where penetrations or their flashings pass through an insulation system, any {{hilite | minor voids less than 25.4 mm (1”) || 2027-February-1 }}{{strike| voids larger than 6.35 mm (1/4") || 2026-January-28 }} around them must be insulated with a spray foam insulation conforming to the material requirements in [[#7.2.2.5. Spray Foam Insulation | Article 7.2.2.5.]], to reduce the potential for condensation|| 2026-October-31 }}.
 </li></ol>
@@ Line 4,512: / Line 4,514: @@
 <ol>
 <li>The ''Design Authority'' is responsible for the design of roof drainage {{hilite | and ''continuity'' of ''control layers'', where these intersect with any part of the designed roof drainage system (Ref. || 2024-June-15 }} [[#3.1.5.1. Securement against Specified Wind Loads | Article 3.1.5.1.]]; {{hilite | also see || 2024-June-15 }} [[#6.1.3.2. Continuity of Control Layers | Article 6.1.3.2.]]).
-<li><span class="recommended">{{hilite | The incorporation of properly sized and located overflows is strongly encouraged || 2026-October-31 }}</span> {{hilite | (Also see || 2026-October-31 }} [[#11.1.4.2. Scuppers and Overflows | {{hilite |Article 11.1.4.2.|| 2026-October-31 }}]]).
+<li>{{hilite | 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),|| 2027-February-1 }} <span class="recommended">{{hilite | the incorporation of properly sized and located overflows, on roofs that may collect water, is strongly encouraged even where they are not required, for new construction and for replacement roofing|| 2027-February-1 }}</span> {{hilite | (Also see [[#11.1.4.2. Scuppers and Overflows | Article 11.1.4.2.]])|| 2027-February-1 }}.
 <li>{{hilite |The size (flow rate) of roof 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|| 2021-October-30 }} [https://free.bcpublications.ca/civix/document/id/public/bcbc2018/bcbc_2018dbacr2 "British Columbia Building Code", Div. B, Appendix C, "Table C-2"], {{hilite |which lists rainfall loads using specific reference locations throughout the province|| 2021-October-30 }}.  {{hilite | See || 2026-October-31 }} [[#11.1.3.2. Roof Drain Function and Location | {{hilite | Articles 11.1.3.2. || 2026-October-31 }}]] {{hilite | and || 2026-October-31 }} [[#11.1.4.2. Scuppers and Overflows | {{hilite | 11.1.4.2. || 2026-October-31 }}]] {{hilite | for function and location || 2026-October-31 }}.
 <li>Membrane gutters must be designed for their anticipated capacity, with consideration given to

@@ Line 4,435: / Line 4,435: @@
 | colspan="1"; style="text-align:center;width:400px;" | {{hilite | '''Figure 10.3.8.3.-A<br>Membrane Picture-Framing<br>Base Membrane Stage'''<br>Forming Part of<br>Sentence 10.3.8.3.(2)<br><small>(Click to expand)</small> || 2025-October-25 }} || colspan="1"; style="text-align:center;width:400px;" | {{hilite | '''Figure 10.3.8.3.-B<br>Membrane Picture-Framing<br>Cap Membrane Stage'''<br>Forming Part of<br>Sentence 10.3.8.3.(5)<br><small>(Click to expand)</small> || 2025-October-25 }}
 |-
-| [[File:SBS Figure 10.3.8.-E.png | link=https://rpm.rcabc.org/images/1/1a/SBS_Figure_10.3.8.-F.png | 350 px]] || [[File:SBS Figure 10.3.8.-F.png | link=https://rpm.rcabc.org/images/1/1a/SBS_Figure_10.3.8.-F.png | 350 px]]
+| [[File:SBS Figure 10.3.8.-E.png | link=https://rpm.rcabc.org/images/a/ae/SBS_Figure_10.3.8.-E.png | 350 px]] || [[File:SBS Figure 10.3.8.-F.png | link=https://rpm.rcabc.org/images/1/1a/SBS_Figure_10.3.8.-F.png | 350 px]]
 |}
@@ Line 4,457: / Line 4,457: @@
 <li>Words that appear in italics are defined in the [[Glossary | Glossary]].  Additionally, the following terms are used in this Part:
 <ol>
-<li>{{hilite | ''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'' || 2026-October-31 }}.
+<li>{{hilite | ''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''|| 2026-October-31 }}.
 <li>''Drain leader'' means "a pipe that is installed to carry ''storm water'' from a roof 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 roof drain''
@@ Line 5,608: / Line 5,608: @@
 ::{|
 |-
-| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 12.3.2.6.-A Application Requirements for PMMA on Roof Penetration''' || 2025-October-25 }}<br>{{hilite | Forming Part of Sentence 12.3.2.6.(4) || 2025-October-25 }}<br><small>(Click to expand illustration)</small>
+| colspan="1"; style="text-align:center;width:450px;" | {{hilite | '''Figure 12.3.2.6.-A Application Requirements for PMMA on Roof Penetration''' || 2025-October-25 }}<br>{{hilite | Forming Part of Sentence 12.3.2.6.(6) || 2025-October-25 }}<br><small>(Click to expand illustration)</small>
 |-
 |  [[File:Figure 12.3.-B (Generic).jpg  |link=https://rpm.rcabc.org/images/7/75/Figure_12.3.-B_%28Generic%29.jpg  | 500 px]]

@@ Line 985: / Line 985: @@
 <li>To qualify for a '''''RoofStar 15-year Guarantee''''', all ''projects'' shall comply with the requirements in this Part for a '''''RoofStar 5-year Guarantee''''' or '''''RoofStar 10-year Guarantee''''', and shall
 <ol>
-<li>{{hilite |comply with the higher securement requirements when enhanced ''roof system'' securement is required by the membrane manufacturer, to meet their system warranty requirements ("enhanced securement" may exceed the securement stated or specified in a ''Tested Assembly'', an ''Assembly with Proven Past Performance'', or a custom-engineered design; see also [[#1.1.2.1. RoofStar 5-Year Guarantee and RoofStar 10-year Guarantee | Article 1.1.2.1., "RoofStar 15-Year Guarantee"]], for further general requirements|| 2020-October-22 }}).
+<li>{{hilite |comply with the higher securement requirements when enhanced ''roof system'' securement is required by the membrane manufacturer, to meet their system warranty requirements ("enhanced securement" may exceed the securement stated or specified in a ''Tested Assembly'', an ''Assembly with Proven Past Performance'', or a custom-engineered design; see also [[#1.1.2.2. RoofStar 15-Year Guarantee | Article 1.1.2.2., "RoofStar 15-Year Guarantee"]], for further general requirements|| 2020-October-22 }}).
 </li></ol>
 </li></ol>