Template:Part 9 (Waterproofing Roofs - SBS) - Revision history

James Klassen at 18:24, 12 November 2021

2021-11-12T18:24:41Z

James Klassen: /* Torch-applied Membranes */

2021-08-17T16:20:11Z

‎Torch-applied Membranes

James Klassen: /* Membrane Walkways and Warning Zones */

2021-07-23T15:44:32Z

‎Membrane Walkways and Warning Zones

James Klassen: /* Membrane Walkways and Warning Zones */

2021-07-23T15:43:23Z

‎Membrane Walkways and Warning Zones

James Klassen: /* Self-adhered and Cold Adhesive-applied Membranes */

2021-07-23T15:40:22Z

‎Self-adhered and Cold Adhesive-applied Membranes

James Klassen: /* Membrane Walkways and Warning Zones */

2021-07-23T15:32:23Z

‎Membrane Walkways and Warning Zones

James Klassen at 20:13, 9 July 2021

2021-07-09T20:13:09Z

James Klassen: /* General */

2021-07-09T20:09:08Z

‎General

James Klassen at 13:57, 14 April 2021

2021-04-14T13:57:23Z

James Klassen at 15:52, 13 April 2021

2021-04-13T15:52:31Z

@@ Line 1: / Line 1: @@
 __NOTOC__
 ==General==
 <span class="reference">SBS-modified bituminous membranes are fabricated as rolled sheets and, when specified for use on roofs, are normally designed for application only on ''Flat'' or ''Low Slope'' structural roof decks and come in a variety of thicknesses and surface finishes.  They may be reinforced with different materials (each reinforcement material exhibiting particular properties and offering different benefits), and may each be applied in one or more ways</span>.

@@ Line 303: / Line 303: @@
 ##burn off any film used to protect the uninstalled membrane surface.
 ##ensure sufficient heat melts the bottom layer of bitumen across the full width of the roll, to adequately bond the membrane to the substrate (<span class="reference">A small "wave" or "bead" of melted bitumen in front of the roll usually indicates sufficient heat</span>).
-##Membrane end lap corners must be cut on a bias (clipped or trimmed on an angle) prior to forming end laps on all torch-applied modified bituminous membrane ''roof systems''.
+#Membrane end lap corners must be cut on a bias (clipped or trimmed on an angle) prior to forming end laps on all torch-applied modified bituminous membrane ''roof systems''.
-##Embed granules prior to forming end laps on all torch-applied modified bituminous cap membranes.
+#Embed granules prior to forming end laps on all torch-applied modified bituminous cap membranes.
 #The applicator must not over-torch or over-heat membranes.  <span class="reference">The polyester fabric used as reinforcement in many thermofusible "torch-on" membranes is subject to dimensional changes at high temperatures</span>.
 #<span class="recommended">Install cap membranes as soon as possible after base membrane installation</span>.  Installed base membranes must be protected from dirt, debris and damage; any damage sustained by the installed base membrane must be adequately repaired following the procedures recommended by the membrane manufacturer.  This work is the responsibility of the ''Contractor''.

@@ Line 377: / Line 377: @@
 </li></ol>
 <li>staggered end laps must be maintained but must be located under the contrasting membrane in order to create a clean edge.
 </li></ol>
 </li></ol>

@@ Line 361: / Line 361: @@
 ===Membrane Walkways and Warning Zones===
 See also '''Part 14 The ROOF as a PLATFORM''' for design, material and installation requirements when using elevated pavers or other walkway materials.
-#When pavers are used as the walkway material, they must be
+<ol>
-##spaced no closer than 3mm (1/8″)
+<li>When pavers are used as the walkway material, they must be
-##supported by non-abrasive pads or proprietary pedestals providing a minimum of 12.7 mm (1/2″) of vertical separation layer for airflow and leveling {{hilite | (slip sheets under pedestals may be necessary to prevent membrane abrasion) || 2020-July-3 }}.
+<ol>
-##{{hilite | secured against movement by wind. || 2020-February-15 }}
+<li>spaced no closer than 3mm (1/8″)
-#When an additional membrane ply is installed over the ''Finished Waterproofing System'', to serve as a ‘sacrificial’ walking surface, the third ply is not considered part of the ''roof system'' and therefore is excluded from coverage under the '''''RoofStar Guarantee'''''.
+<li>supported by non-abrasive pads or proprietary pedestals providing a minimum of 12.7 mm (1/2″) of vertical separation layer for airflow and leveling {{hilite | (slip sheets under pedestals may be necessary to prevent membrane abrasion) || 2020-July-3 }}.
-#When warning zones are specified as part of the primary roof membrane,
+<li>{{hilite | secured against movement by wind. || 2020-February-15 }}
-##the membrane
+</li></ol>
-###may be part of the primary roof membrane, in a contrasting colour.
+<li>When an additional membrane ply is installed over the ''Finished Waterproofing System'', to serve as a ‘sacrificial’ walking surface, the third ply is not considered part of the ''roof system'' and therefore is excluded from coverage under the '''''RoofStar Guarantee'''''.
-###must be oriented parallel to the primary field runs.
+<li>When warning zones are specified as part of the primary roof membrane,
-##staggered end laps must be maintained but must be located under the contrasting membrane in order to create a clean edge.
+<ol>
-<div class="col-md-12">
+<li>the membrane

@@ Line 332: / Line 332: @@
 <li>{{hilite | are applied to a base membrane coated on the top face with a polyethylene film, the film must be defeated (burned away) before the cap membrane may be installed|| 2022-June-17 }}.
 <li>{{hilite | are welded at the seams with a hot-air welder, the seams must be fully welded to ensure a uniform bond between plies|| 2022-June-17 }}.
 </li></ol>

← Older revision		Revision as of 15:32, 23 July 2021
Line 370:		Line 370:
	###must be oriented parallel to the primary field runs.		###must be oriented parallel to the primary field runs.
	##staggered end laps must be maintained but must be located under the contrasting membrane in order to create a clean edge.		##staggered end laps must be maintained but must be located under the contrasting membrane in order to create a clean edge.
		+	<div class="col-md-12">

@@ Line 13: / Line 13: @@
 ##<span class="reference">'''Cold-adhered''' (using bitumen-based or synthetic adhesive, this may sometimes be referred to as 'cold-applied’)</span>.
 ##<span class="reference">'''Hot bitumen adhered''' (sometimes referred to as 'hot-mopped', 'hot-applied' or simply 'mopped', this application method applies to both the base and cap membranes, or may apply only to the base membrane; the cap, then, is torch-applied to the base membrane)</span>.
 <div id="MEMB_FIELD_DESIGN"></div>
 ===Design===
 ====RoofStar 15-Year Guarantee====
@@ Line 92: / Line 93: @@
 ===Composition, Thickness and Selection===
 <ol>
 <li>Both the base and cap membranes in 2 or 3-Ply SBS-modified bituminous membrane ''system'' must be modified with the same polymer. For example, if the cap membrane is modified with SBS, then the base membrane must be SBS-modified also. Oxidized asphalt membranes will be considered as underlay only and must not be counted as one of two plies.</li>
 <li>Membranes must be selected from the list of Accepted Materials published in this ''Manual'', and each membrane must conform the minimum requirements outlined in '''Table 9.1'''.
 <li>Liquid membranes must be reinforced and accepted for use over a base membrane ply acceptable to the manufacturer of the liquid membrane.
-<li><span class="principles">Some membranes may be susceptible to damage from bird droppings, pet urine or chemical contamination (oils, solvents or any discharge from a mechanical unit).  The ''Design Authority'' is strongly urged to consider these issues in light of the overall ''project'' design, consult with the membrane manufacturer for guidance, and provide adequate membrane protection when it is necessary</span>.  See also '''14 Roof Coverings and Living Spaces'''.</li>
+<li><span class="principles">Some membranes may be susceptible to damage from bird droppings, pet urine or chemical contamination (oils, solvents or any discharge from a mechanical unit).  The ''Design Authority'' is strongly urged to consider these issues in light of the overall ''project'' design, consult with the membrane manufacturer for guidance, and provide adequate membrane protection when it is necessary</span>.  See also '''14 Roof Coverings and Living Spaces'''.
-</ol>
+</li></ol>
 {|            class="wikitable mw-datatable" style="margin-left: 10pt; margin-right: auto;border-color:#E7E9E9;vertical-align:top;text-align:top;"
@@ Line 224: / Line 231: @@
 #All materials, including but not limited to primers, mastics, granules or coatings, that comprise the ''roof system'' must be supplied or accepted by the membrane manufacturer.
 <div id="MEMB_FIELD_APPLICATION"></div>
 ==Application==
 ===General===
@@ Line 276: / Line 284: @@
 ##approved or recommended by the manufacturer.
 <div id="MEMB_FIELD_MECHAN"></div>
 ===Mechanically Attached Membranes===
 #Whenever possible, orient mechanically fastened membranes perpendicular to steel ''deck'' flutes in order to distribute fasteners across the ''deck''.
@@ Line 286: / Line 295: @@
 ##require a minimum slope 1:16 (¾" in 12").
 <div id="MEMB_FIELD_TORCH"></div>
 ===Torch-applied Membranes===
 #{{hilite | Directly torch-applying any membrane to an unprotected combustible material is strictly prohibited || 2020-July-3 }}.
@@ Line 297: / Line 307: @@
 #The applicator must not over-torch or over-heat membranes.  <span class="reference">The polyester fabric used as reinforcement in many thermofusible "torch-on" membranes is subject to dimensional changes at high temperatures</span>.
 #<span class="recommended">Install cap membranes as soon as possible after base membrane installation</span>.  Installed base membranes must be protected from dirt, debris and damage; any damage sustained by the installed base membrane must be adequately repaired following the procedures recommended by the membrane manufacturer.  This work is the responsibility of the ''Contractor''.
 <div id="MEMB_FIELD_ADHERED"></div>
 ===Adhered Membranes===
 ====<big>General</big>====
@@ Line 313: / Line 323: @@
 ====<big>Self-adhered and Cold Adhesive-applied Membranes</big>====
-#When both the base and cap membranes are self-adhered, the cap membrane must be installed on a clean, dry base and both must be completed together on the same workday, according to the manufacturer’s published instructions. Phased installation of membranes is not permitted.
+<ol>
-#To ensure even, full contact with the substrate, all self-adhered and cold adhesive-applied field membranes must be fully rolled with a roller weighing at least 34.2 Kg (75 lbs).
+<li>When both the base and cap membranes are self-adhered, the cap membrane must be installed on a clean, dry base and both must be completed together on the same workday, according to the manufacturer’s published instructions. Phased installation of membranes is not permitted.
-#Self-adhesive membranes must be installed only when the ambient air temperature meets or exceeds the temperature permitted by the manufacturer.
+<li>To ensure even, full contact with the substrate, all self-adhered and cold adhesive-applied field membranes must be fully rolled with a roller weighing at least 34.2 Kg (75 lbs).
 ====<big>Hot Bitumen-adhered Membranes</big>====
@@ Line 325: / Line 342: @@
 #Install membranes with Type 3 or 4 oxidized asphalt or Type 3 or 4 SEBS modified asphalt.
 <div id="MEMB_FIELD_LIQUID"></div>
 ===Liquid Membranes===
 Where it is desirable for the field membrane to resist the damaging effects of grease, oils or other contaminants {{hilite | only a Roofstar-accepted reinforced <u>2-component</u> catalyzed polymethyl methacrylate (PMMA) liquid membrane|| 2021-February-7 }} may be specified and installed over a suitable base membrane.  The following standards pertain to the application of these materials in the field and around penetrations:
@@ Line 339: / Line 357: @@
 #When applied to the roof field around a penetration, the same liquid membrane must extend up the adjacent vertical surfaces by at least 200 mm (8”).  See also '''11.3.3.3 Liquid Membrane Flashing'''.  Application rates and guidelines issued by the manufacturer of the liquid flashing product must be followed, unless superseded by these standards.
 <div id="MEMB_FIELD_WALK"></div>
 ===Membrane Walkways and Warning Zones===
 See also '''Part 14 The ROOF as a PLATFORM''' for design, material and installation requirements when using elevated pavers or other walkway materials.

@@ Line 86: / Line 86: @@
 </li></ol>
 <div id="MEMB_FIELD_MATERIALS"></div>
 ==Materials==
 See Accepted [http://rpm.rcabc.org/index.php/Flexible_Membrane_Roofing_Systems:_SBS '''SBS-Modified Bituminous Membranes'''] for '''''RoofStar-guaranteed''''' ''roof systems''. See also '''Part 3 SECURING the ROOF ASSEMBLY''' for special requirements concerning membrane roofs.