(Draft) EPDM Roof Systems Standard - Revision history

James Klassen: /* 11.1.3.2. Roof Drain Function and Location */

2026-05-11T14:36:04Z

‎11.1.3.2. Roof Drain Function and Location

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

@@ Line 4,303: / Line 4,303: @@
 <li>''Roof drains'' on new construction ''projects'' must be located at least {{hilite | 457.2 mm (18") || 2024-June-15 }} {{strike| 304.8 mm (12”) || 2023-June-15 }} 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>{{hilite | 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. || 2024-June-15 }}
-<li>When {{hilite | a roof is replaced and || 2024-June-15 }} existing ''roof drain'' {{strike| and penetration locations || 2023-June-15 }} do not comply with the spacing requirements in this Part, the ''Design Authority'' must submit {{strike| a written request for a Variance, following the requirements in [[#1.1.3.6. Variances | Article 1.1.3.6., "Variances"]] || 2023-June-15 }}{{hilite | a drawn detail for a review by the '''''Guarantor'''''; the detail must incorporate the following requirements and principles, together with requirements in Subsection 11.3.3 || 2024-June-15 }}:
+<li>When {{hilite | a roof is replaced and || 2024-June-15 }} existing ''roof drains'' {{strike| and penetration locations || 2023-June-15 }} do not comply with the spacing requirements in this Part, the ''Design Authority'' must submit {{strike| a written request for a Variance, following the requirements in [[#1.1.3.6. Variances | Article 1.1.3.6., "Variances"]] || 2023-June-15 }}{{hilite | a drawn detail for a review by the '''''Guarantor'''''; the detail must incorporate the following requirements and principles, together with requirements in Subsection 11.3.3 || 2024-June-15 }}:
 <ol>
 <li><span class="principles">{{hilite | Specify sheet membrane flashing to seal in the drain to the field membrane (liquid membranes should be the last option) || 2024-June-15 }}</span>.

@@ 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: @@
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