(Draft) EPDM Roof Systems Standard - Revision history

James Klassen: /* 11.2.1.3. Membrane Gutters and Gutter Liners */

2026-04-20T14:55:13Z

‎11.2.1.3. Membrane Gutters and Gutter Liners

James Klassen: /* 11.2.1.3. Membrane Gutters and Gutter Liners= */

2026-04-20T14:54:58Z

‎11.2.1.3. Membrane Gutters and Gutter Liners=

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

2026-04-10T20:57:24Z

‎3.1.3.2. Calculation of Specified Wind Loads

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

2026-04-10T20:55:05Z

‎3.1.3.2. Calculation of Specified Wind Loads

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

2026-03-31T16:38:55Z

‎3.1.3.2. Calculation of Specified Wind Loads

James Klassen: /* 9.3.2.1. Preparation of Substrate */

2026-03-27T16:33:19Z

‎9.3.2.1. Preparation of Substrate

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

2026-02-13T17:48:40Z

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

James Klassen: /* 13.3.2.2. Seams */

2026-02-13T17:47:30Z

‎13.3.2.2. Seams

James Klassen at 18:17, 30 January 2026

2026-01-30T18:17:09Z

James Klassen at 16:45, 28 January 2026

2026-01-28T16:45:30Z

@@ Line 4,507: / Line 4,507: @@
 <li>must conform to the sheet metal requirements in [[#13.2.1.2. Sheet Metal Grade and Gauge | Article 13.2.1.2.]]
 </ol></li>
 </ol></li>

@@ Line 4,488: / Line 4,488: @@
 </li></ol>
-===11.2.1.3. Membrane Gutters and Gutter Liners====
+====11.2.1.3. Membrane Gutters and Gutter Liners====
 <ol>

@@ Line 1,049: / Line 1,049: @@
 <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-roof-calculators-internet-wind-rci "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 EPDM Standard#A-3.1.1.1. | Note A-3.1.1.1.]]).
 </li></ol>

@@ Line 1,049: / Line 1,049: @@
 <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 Uplift Resistance Calculator"] (formerly "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 EPDM Standard#A-3.1.1.1. | Note A-3.1.1.1.]]).
 </li></ol>

@@ Line 1,091: / Line 1,091: @@
 <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 3,177: / Line 3,177: @@
 <li>capable of accommodating ''roof system'' component movement,
 <li>clean,
-<li>adequately dry and frost-free {{hilite | (Ref. || 2023-October-28 }} [[EPDM_Roof_Systems_Standard#2.1.5._Roof_Decks | {{hilite | Subsection 2.1.5., "Roof Decks" || 2023-October-28 }}]]),
+<li>adequately dry and frost-free {{hilite | (Ref. || 2023-October-28 }} [[SBS_Roof_Systems_Standard#2.1.5._Roof_Decks | {{hilite | Subsection 2.1.5., "Roof Decks" || 2023-October-28 }}]]),
 <li>reasonably smooth and free of abrupt elevation changes, and
 <li>absolutely free of
@@ Line 3,195: / Line 3,195: @@
 <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 3,214: / Line 3,213: @@
 <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 5,913: / Line 5,913: @@
 <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 5,791: / Line 5,791: @@
 <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 5,836: / Line 5,836: @@
 <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 5,863: / Line 5,865: @@
 |-
 |-
-| 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 5,871: / Line 5,873: @@
 |-
 |-
-| 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 6,554: / Line 6,554: @@
 <div class="col-md-12">
-[[Main Page | <i class="fa fa-home fa"></i> Home]]
+[[RCABC Roofing Practices Manual | <i class="fa fa-home fa"></i> Home]]
 </div>
 {{Template:RPM Page Footer with Copyright and Current Date}}

@@ Line 75: / Line 75: @@
 <div style="text-align:center">
 '''First Edition''': October 18, 2019
-<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">