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

James Klassen: /* Section 13.3. Application */

2026-06-12T22:32:27Z

‎Section 13.3. Application

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James Klassen: /* Section 13.2. Materials */

2026-06-12T21:57:59Z

‎Section 13.2. Materials

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James Klassen: /* 13.1.3. All Systems */

2026-06-12T21:43:12Z

‎13.1.3. All Systems

James Klassen: /* Part 13 - Linear Metal Flashing */

2026-06-12T21:22:02Z

‎Part 13 - Linear Metal Flashing

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James Klassen: /* Section 12.3. Application */

2026-06-12T20:58:47Z

‎Section 12.3. Application

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James Klassen: /* Section 12.3. Application */

2026-06-12T20:12:40Z

‎Section 12.3. Application

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James Klassen: /* Section 12.2. Materials */

2026-06-12T18:19:40Z

‎Section 12.2. Materials

James Klassen: /* Section 12.1. Design */

2026-06-12T17:55:26Z

‎Section 12.1. Design

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James Klassen: /* Section 11.3. Application */

2026-06-12T17:20:15Z

‎Section 11.3. Application

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James Klassen: /* Section 11.2. Materials */

2026-06-11T16:46:26Z

‎Section 11.2. Materials

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@@ Line 3,086: / Line 3,086: @@
 <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">{{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><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></ol>
-====13.1.3.6. Cap Flashing, Counter-flashing, and Reglet Flashing====
+====13.1.3.6. Cap Flashing, Counterflashing, and Reglet Flashing====
 <ol>
-<li>{{hilite | Cap (coping) flashings || 2024-January-31 }}
+<li>Cap (coping) flashings
 <ol>
-<li>{{hilite | are required for all ''parapets'' (including parapets on roof areas that are adjacent to each other), || 2024-January-31 }}
+<li>are required for all ''parapets'' (including ''parapets'' on ''waterproofing assemblies'' that are adjacent to each other),
-<li>{{hilite | are optional for roof dividers that are fully enveloped with roofing membrane (Ref. || 2024-January-31 }} [[#10.3.6.2. Control Joints (Roof Dividers) | Article 10.3.6.2.]]), {{hilite | and || 2024-January-31 }}
+<li>are optional for ''control joints'' (area dividers) that are fully enveloped with waterproofing membrane (Ref. [[#10.3.6.2. Control Joints (Roof Dividers) | Article 10.3.6.2.]]), and
-<li><span class="recommended">{{hilite | are recommended on roof dividers where the membrane may be susceptible to abrasion or mechanical damage || 2024-January-31 }}</span>.
+<li><span class="recommended">are recommended on ''control joints'' (area dividers) where the membrane may be susceptible to abrasion or mechanical damage</span>.
 </li></ol>
-<li>{{hilite | All linear metal cap (coping) flashing specified for ''parapets'' shall indicate securement to a solid substrate || 2024-January-26 }}
+<li>All linear metal cap (coping) flashing specified for ''parapets'' shall indicate securement to a solid substrate
 <ol>
-<li>{{hilite | at every seam, using S-locks or standing seam clips (Ref. || 2024-January-31 }} [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]),
+<li>at every seam, using S-locks or standing seam clips (Ref. [[#13.3.2.2. Seams | Article 13.3.2.2., "Seams"]]),
-<li>{{hilite | beneath the outside vertical face of the flashing, using hidden clips (Ref. || 2024-January-31 }}[[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3.]]), {{hilite | and || 2024-January-31 }}
+<li>beneath the outside vertical face of the flashing, using hidden clips (Ref. [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3.]]), and
-<li>{{hilite | on the roof-side (inside) face of the flashing. || 2024-January-31 }}
+<li>on the waterproofing side (inside) face of the flashing.
 </li></ol>
-<li>{{hilite | The use of exposed fasteners on the exterior face of cap (coping) flashing specified for ''parapets'' is not permissible. || 2024-January-31 }}
+<li>The use of exposed fasteners on the exterior face of cap (coping) flashing specified for ''parapets'' is not permissible.
-<li>When the top surface of a ''wall'' exceeds 101.6 mm (4") in width, linear metal coping (cap) flashing must be specified with a minimum slope of 2% toward the roof-side of the parapet, to promote drainage (<span class="recommended">drainage toward the exterior of a building is <u>not recommended</u></span>).
+<li>When the top surface of a ''wall'' exceeds 101.6 mm (4") in width, linear metal coping (cap) flashing must be specified with a minimum slope of 2% toward the waterproofing side of the ''parapet'', to promote drainage (<span class="recommended">drainage toward the exterior of a building is <u>not recommended</u></span>).
 <li>All metal cap (coping) flashing must be designed with full, solid support.
 <li>When the specified cap flashing material is thicker or heavier than 18-gauge steel or aluminum, or it exceeds the permissible weight or gauge ranges for copper or zinc flashings, the seam and securement design must be submitted to the '''''Guarantor''''' for review prior to tender (See [[#13.3.2.2. Seams | Article 13.3.2.2.]] concerning flat butt seams).
-<li>{{hilite | Base metal flashings used to conceal wall materials or to restrain filtration materials and drainage boards must be fashioned to conform to || 2026-October-31 }} [[#13.2.2.1. Fabrication of Flashing | {{hilite | Article 13.2.2.1.|| 2026-October-22 }}]] {{hilite | and || 2026-October-31 }} [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | {{hilite | Article 13.3.2.3. || 2026-October-31 }}]]
+<li>Base metal flashings used to conceal wall materials or to restrain filtration materials and drainage boards must be fashioned to conform to [[#13.2.2.1. Fabrication of Flashing | Article 13.2.2.1.]] and [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3.]]
 </li></ol>
@@ Line 3,114: / Line 3,114: @@
 <ol>
-<li>Where a ''parapet'' intersects with a ''wall'', the union must be designed to direct water to the roof, away from the outer surface of the ''wall'', using a metal saddle assembly in combination with the membrane requirements in [[#10.3.4.1. Parapets | Article 10.3.4.1.]] (Ref. [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3.]]).
+<li>Where a ''parapet'' intersects with a ''wall'', the union must be designed to direct water to the ''waterproofing system'', away from the outer surface of the ''wall'', using a metal saddle assembly in combination with the membrane requirements in [[#10.3.4.1. Parapets | Article 10.3.4.1.]] (Ref. [[#13.3.2.3. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.3.2.3.]]).
 </ol></li>

@@ Line 2,639: / Line 2,639: @@
 <li>Sheet membranes used to flash (strip in) penetrations and ''curbs'' shall be
 <ol>
-<li>the same membrane used on the roof field, or
+<li>the same membrane used on the system field, or
 <li>sheet or liquid membranes conforming to [[#10.2.1.1. Flashing Membranes | Article 10.2.1.1.]]
 </li></ol>
@@ Line 2,647: / Line 2,647: @@
 <ol>
-<li>All roof penetration flashings, except flashings that are proprietary to the ''manufacturer'' {{hilite | and flashings that are installed or supplied by others as part of a Code-compliant, certified chimney assembly (i.e., for solid fuel heating appliances) || 2023-October-28 }}, must be
+<li>All penetration flashings, except flashings that are proprietary to the ''manufacturer'' {{hilite | and flashings that are installed or supplied by others as part of a Code-compliant, certified chimney assembly (i.e., for solid fuel heating appliances) || 2023-October-28 }}, must be
 <ol>
 <li>accepted by or acceptable to the '''''Guarantor''''',
 <li>manufactured to conform to CSA-B272, "Prefabricated Self-Sealing Roof Vent Flashings" (a penetration flashing fabricated by the ''Contractor'' is exempt from this requirement),
 <li>permanently marked with the standard number it conforms to, which shall be independently validated through published testing by a qualified third-party,
 <li>manufactured from sheet metal conforming to the material requirements in [[#Section 13.2. Materials | Section 13.2.]], when the flashing is custom-made or fabricated by the ''Contractor'',
-<li>compatible with the ''roof system'',
+<li>compatible with the ''waterproofing system'',
 <li>seamless or, in the alternative, fabricated with fully hot-welded joints, including a base flange at least 101.6 mm (4”) wide,
 <li>capable of inhibiting the intrusion of vermin and insects into the ''roof assembly'' and building interior, and
@@ Line 2,660: / Line 2,661: @@
 <li>Metal penetration flashings that are purpose-made for
 <ol>
-<li>electrical cables must be goose-necked and supplied with a downward-facing weather head, and
+<li>electrical cables must be goose-necked and supplied with a downward-facing weather head that incorporates proprietary rubber-based friction seals, and
 <li>plumbing vents shall be supplied with a matching settlement cap produced by the same manufacturer.
 </li></ol>
@@ Line 2,669: / Line 2,670: @@
 <li>be at least 203.2 mm (8”) tall when measured from the ''finished roof system surface'' to an opening.
 </li></ol>
-<li>{{hilite | In addition to the requirements in Sentence (1), || 2026-July-1 }} <span class="principles">{{hilite | stainless-steel penetration flashings specified for corrosive environments should be made of Grade 304 stainless steel || 2026-July-1 }}</span> {{hilite | conforming to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”, but when the penetration flashings may be subjected to regular or constant exposure to or immersion in water (especially in a coastal environment), or to corrosive environments, the stainless steel shall be Grade 316L (conforming to the same ASTM standard) (See || 2026-July-1 }} [[Notes to Hot Rubber Standard#A-13.2.1.2.(3)(2)| {{hilite | Note A-13.2.1.2.(3)(2)|| 2026-July-1 }}]]).
+<li>In addition to the requirements in Sentence (1), <span class="principles">stainless-steel penetration flashings specified for corrosive environments should be made of Grade 304 stainless steel</span> conforming to ASTM A240/A240M-22a, “Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications”, but when the penetration flashings may be subjected to regular or constant exposure to or immersion in water (especially in a coastal environment), or to corrosive environments, the stainless steel shall be Grade 316L (conforming to the same ASTM standard) (See [[Notes to GLW Standard#A-13.2.1.2.(3)(2)| Note A-13.2.1.2.(3)(2)]]).
 <li>Storm collars
 <ol>
@@ Line 2,678: / Line 2,679: @@
 <li><span class="principles">should be fabricated with a channel at the top edge, for retaining sealant.</span>
 </li></ol>
-<li>{{hilite | EPDM used to form a seal between a penetration and its flashing (Ref. || 2024-January-31 }} [[#12.3.2.1. General Requirements for Flashing Penetrations | Article 12.3.2.1.(12)]]) {{hilite | shall be semi-cured and possess a nominal thickness of no less than 60 mils. || 2024-January-31 }}
+<li>EPDM used to form a seal between a penetration and its flashing (Ref. [[#12.3.2.1. General Requirements for Flashing Penetrations | Article 12.3.2.1.(12)]]) shall be semi-cured and possess a nominal thickness of no less than 60 mils.
-<li>{{hilite | Unshielded flexible mechanical couplings used to join a flashing and a pipe penetration shall be || 2024-January-31 }}
+<li>Unshielded flexible mechanical couplings used to join a flashing and a pipe penetration shall be
 <ol>
-<li>{{hilite | certified to meet ASTM C564 or ASTM D5926, || 2024-January-31 }}
+<li>certified to meet ASTM C564 or ASTM D5926,
-<li>{{hilite | certified to meet ASTM C1173 and CSA-B602, || 2024-January-31 }}
+<li>certified to meet ASTM C1173 and CSA-B602,
-<li>{{hilite | supplied with top and bottom proprietary screw-type stainless steel mechanical clamps, || 2024-January-31 }}
+<li>supplied with top and bottom proprietary screw-type stainless steel mechanical clamps,
-<li>{{hilite | leak-proof, resistant to chemicals, UV-stable, and || 2024-January-31 }}
+<li>leak-proof, resistant to chemicals, UV-stable, and
-<li>{{hilite | suitable for the penetration and flashing they join together. || 2024-January-31 }}
+<li>suitable for the penetration and flashing they join together.
 </li></ol>
 </li></ol>
@@ Line 2,696: / Line 2,697: @@
 <li>In addition to the general requirements in [[#12.2.1.2. General Requirements for Penetration Flashings | Article 12.2.1.2.]], all metal penetration flashings (except natural airflow vents) used for heating and plumbing penetrations must be
 <ol>
-<li>properly sized for the penetration, both in diameter and height,
+<li>properly sized for the penetration, both in diameter and height, and
 <li>supplied with a properly sized galvanized storm collar or settlement cap.
 </li></ol>
 </li></ol>
-====12.2.1.4. {{hilite | Liquid Membrane Flashing || 2026-October-31 }}====
+====12.2.1.4. Liquid Membrane Flashing====
 <ol>
-<li>{{hilite | Polymethyl methacrylate (PMMA) and polyurethane methyl methacrylate (PUMA) liquid membrane flashing systems must be || 2026-October-31 }}
+<li>Polymethyl methacrylate (PMMA) and polyurethane methyl methacrylate (PUMA) liquid membrane flashing systems must be
 <ol>
-<li>{{hilite | catalyzed 2-component systems, || 2026-October-31 }}
+<li> catalyzed 2-component systems,
-<li>{{hilite | fleece-reinforced with the manufacturer's proprietary polyester fleece, and || 2026-October-31 }}
+<li>fleece-reinforced with the manufacturer's proprietary polyester fleece, and
-<li>{{hilite | accepted listed in [[Division C | Division C]] of this ''Manual''|| 2026-October-31 }}.
+<li>accepted listed in [[Division C | Division C]] of this ''Manual''.
 </li></ol>
-<li>{{hilite | Single-component polyurethane and silicon-based liquid membrane flashing system must be listed in [[Division C | Division C]]. || 2026-October-31 }}
+<li>Single-component polyurethane and silicon-based liquid membrane flashing system must be listed in [[Division C | Division C]].
-<li>{{hilite | Accessory PMMA detailing products || 2026-October-31 }}
+<li>Accessory PMMA detailing products
 <ol>
-<li>{{hilite | must be listed in [[Division C | Division C]], and || 2026-October-31 }}
+<li>must be listed in [[Division C | Division C]], and
-<li>{{hilite | must be reinforced with chopped or loose reinforcement fibres supplied by the ''manufacturer''. || 2026-October-31 }}
+<li>must be reinforced with chopped or loose reinforcement fibres supplied by the ''manufacturer''.
 </li></ol>
 </li></ol>