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

James Klassen: /* 9.1.3.5. Securement */

2026-06-19T22:13:51Z

‎9.1.3.5. Securement

James Klassen: /* 5.1.3.1. Required Use of Overlays */

2026-06-19T22:00:29Z

‎5.1.3.1. Required Use of Overlays

James Klassen: /* 2.1.3.1. General Requirements for Roof Slope */

2026-06-19T21:45:09Z

‎2.1.3.1. General Requirements for Roof Slope

James Klassen: /* 2.1.3.1. General Requirements for Roof Slope */

2026-06-19T21:42:42Z

‎2.1.3.1. General Requirements for Roof Slope

James Klassen: /* 11.1.4.2. Scuppers and Overflows */

2026-06-16T20:59:58Z

‎11.1.4.2. Scuppers and Overflows

James Klassen at 20:57, 16 June 2026

2026-06-16T20:57:24Z

James Klassen: /* 1.1.4.4. Membrane Recovering */

2026-06-16T20:56:00Z

‎1.1.4.4. Membrane Recovering

James Klassen: /* 7.1.6. Protected Roof Systems */

2026-06-16T20:52:28Z

‎7.1.6. Protected Roof Systems

James Klassen: /* 7.1.6.2. Drainage Mats and Filter Fabric */

2026-06-16T20:51:14Z

‎7.1.6.2. Drainage Mats and Filter Fabric

James Klassen: /* 7.3.2.2. Alignment, Sizing, and Support */

2026-06-16T20:50:01Z

‎7.3.2.2. Alignment, Sizing, and Support

← Older revision		Revision as of 22:13, 19 June 2026
Line 1,442:		Line 1,442:

	====9.1.3.5. Securement====		====9.1.3.5. Securement====
−	~~(See [[Notes to GLW Standard#A-9.1.3.3. \| Note A-9.1.3.3.]])~~

	<ol>		<ol>

@@ Line 842: / Line 842: @@
 ===5.1.3. All Systems===
 ====5.1.3.1. Required Use of Overlays====
-(See [[Notes to GLW Standard#A-5.1.3.1.| Note A-5.1.3.1.]]; see also [[#Part 9 - Membrane System field) | Part 9]] and [[#Part 10 - Perimeters and Walls | Part 10]] for substrate preparation requirements)
+(See [[#Part 9 - Membrane System field) | Part 9]] and [[#Part 10 - Perimeters and Walls | Part 10]] for substrate preparation requirements)
 <ol>

@@ Line 616: / Line 616: @@
 <li>The ''Design Authority'' must design the slope of a ''deck'' to achieve proper drainage and must take into consideration the anticipated deflection and settlement of the structure, which may interfere with drainage.
 <li><span class="principles">While good drainage is desirable but not always perfectly achievable, and ''waterproofing systems'' generally are not affected by standing water, each ''project'' design should incorporate sufficient slope to move water off the ''waterproofing system'' surface</span>.
-<li>"Sufficient slope", which is subject to conditions that permit evaporation, shall mean that no standing water remains on the ''waterproofing system'' surface after a reasonable interval following a rainfall (See [[Notes to GLW Standard#A-2.1.3.1.(4) | Note A-2.1.3.1.(4)]]).
+<li>"Sufficient slope", which is subject to conditions that permit evaporation, shall mean that no standing water remains on the ''waterproofing system'' surface after a reasonable interval following a rainfall.
 <li><span class="principles">''Deck'' slope should be increased beyond the minimums published in this Standard when local climate conditions, such as rainfall frequency or severity, result in ongoing or significant ponding conditions</span> (see [[#2.1.3.2. Deck Slope for New Construction | Article 2.1.3.2.]] and [[#2.1.3.3. Slope for Replacement Roofing | Article 2.1.3.3.]] for minimum requirements).
 <li><span class="principles">Drainage (slope toward plumbing ''drains'') should be achieved (in descending order of best practices) with</span>

@@ Line 612: / Line 612: @@
 ===2.1.3. All Systems===
 ====2.1.3.1. General Requirements for Roof Slope====
 <ol>

@@ Line 2,231: / Line 2,231: @@
 <ol>
 <li><span class="recommended">should be located around the perimeter of a ''waterproofing assembly'', through ''parapets'' (recommended)</span>, but
-<li><span class="principles">may be a ''secondary drain'' in the field provided it is plumbed in keeping with the “British Columbia Plumbing Code”, Div. B, Subsection 2.4.6 and Article 2.4.10.4.</span> [[Notes to GLW Standard#A-11.1.4.2. (See Note A-11.1.4.2.)]].
+<li><span class="principles">may be a ''secondary drain'' in the field provided it is plumbed in keeping with the “British Columbia Plumbing Code”, Div. B, Subsection 2.4.6 and Article 2.4.10.4.</span> [[Notes to GLW Standard#A-11.1.4.2. | (See Note A-11.1.4.2.)]].
 </li></ol>
 <li><span class="principles">Where no ''overflows'' are specified, the building structure should be designed to carry the total load of water collected on the ''waterproofing assembly'', in the event of ''primary drain'' failure.

@@ Line 70: / Line 70: @@
 | <hr>
 |-
-| [[Notes to Waterproofing Standard | Notes to Standard]]
+| [[Notes to GLW Standard | Notes to Standard]]
 |-
 |}

@@ Line 405: / Line 405: @@
 <li>To qualify for a written Variance from the '''''Guarantor''''', the Variance request (See [[#1.1.3.6._Variances |Article 1.1.3.6.]])
 <ol>
-<li>must identify the type of ''waterproofing system'' to which the Variance pertains (i.e., ''uninsulated'', ''conventionally insulated'', ''protected'', or ''modified protected'' ''roof system''),
+<li>must identify the type of ''waterproofing system'' to which the Variance pertains (i.e., ''uninsulated'' or ''protected waterproofing system''),
 <li>must specify how the in-service ''waterproofing system'' will be physically separated from other roof areas, and
 <li>must include the formal independent report that describes the condition of the in-service ''waterproofing system'', and which documents results from cut tests and moisture investigation that are prerequisites for a '''''RoofStar Guarantee'''''.</span>

@@ Line 1,209: / Line 1,209: @@
 ===7.1.5. Reserved===
-===7.1.6. Protected Roof Systems===
+===7.1.6. Protected Waterproofing Systems===
 (The requirements in [[#7.1.3. All Systems | Subsection 7.1.3., "All Systems"]], shall be read together with the following articles)

@@ Line 1,221: / Line 1,221: @@
 <ol>
-<li>At least one drainage layer is required in a ''protected membrane roof system'', either above or below the XPS insulation, but
+<li>At least one drainage layer is required in a ''protected waterproofing system'', either above or below the XPS insulation, but
 <ol>
 <li>when openings for penetrations in ''walls'' or the ''deck'' provide less than 203.2 mm (8”) of clearance, the filtration layer must be water-permeable and the drainage layer shall be below the XPS insulation, to lower the ''drainage plane'' and minimize leaks into the building, and

@@ Line 1,298: / Line 1,298: @@
 <li>must be firmly supported,
 <li><span class="principles">should be square and should make firm, full contact with adjacent panels,</span>
-<li>must be installed with the appropriate grade of expanding spray foam applied to gaps greater than 6.35 mm (1/4”) (this requirement does not apply to extruded polystyrene (XPS) installed in a ''protected roof system''), and
+<li>must be installed with the appropriate grade of expanding spray foam applied to gaps greater than 6.35 mm (1/4”) (this requirement does not apply to extruded polystyrene (XPS) installed in a ''protected waterproofing system''), and
 <li>shall not be soldiered and must be laterally offset at least 304.8 mm (12") in two directions, both for adjacent layers and for adjacent row; a minus offset tolerance of 50.8 mm (2") maximum is permissible (See '''Figure 7.3.2.2.-A''').
 </li></ol>