Difference between revisions of "Deck and Wall Overlays"

Revision as of 16:14, 20 June 2016

1 General

NOTE: See also Accepted Roof Deck Overlay Board products

For RoofStar Guarantee Standards pertaining to Deck Overlay Boards, refer to subsection 3 (SUBSTRATES - DECK OVERLAY BOARD and WALL SHEATHING) in either Low Slope Roof Systems or for Architectural Sheet Metal Roof Systems.

A roof system underlay is installed under the roof system and over the roof deck assembly. Underlays are most commonly placed over steel decks to provide a level surface for the membrane, or as a thermal barrier between the roof deck and combustible insulation.

2 Underlays for Metal Roofing

Acceptable membrane underlays for metal roofing are listed in Section 8.2 and in Section 2.2 (accepted Materials list) of this manual.

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Vapour Retarders

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 === General ===
-NOTE: Refer to subsection 3 (SUBSTRATES - DECK OVERLAY BOARD and WALL SHEATHING) of the RoofStar Guarantee Standards for either [[Section:D. Low Slope Roofs|Low Slope Roof Systems]] or for [[ASM (Architectural Sheet Metal) Roof Systems|Architectural Sheet Metal Roof Systems]].
+{| class="wikitable"
+|-
+| NOTE''': See also [[Roof Deck Overlay Board|Accepted Roof Deck Overlay Board products]]
+|}
-<div class="principles">A roof system underlay is installed under the roof system and over the roof deck assembly. Underlays are most commonly placed over steel decks to provide a level surface for the membrane, or as a thermal barrier between the roof deck and combustible insulations.</div>
+For '''RoofStar Guarantee Standards''' pertaining to Deck Overlay Boards, refer to subsection 3 (SUBSTRATES - DECK OVERLAY BOARD and WALL SHEATHING) in either [[Section:D. Low Slope Roofs|Low Slope Roof Systems]] or for [[ASM (Architectural Sheet Metal) Roof Systems|Architectural Sheet Metal Roof Systems]].
+<hr>
-RGC requires either minimum 12.7 mm (1/2") gypsum with fibreglass facers and a silicone treated gypsum core (See Section 2.1, A2.5) or minimum 12.7 mm (1/2") plywood as an underlay for membranes installed directly over steel decks. Where an underlay is used as a thermal barrier, it must conform to the applicable code and insurance requirements for the roof assembly.
+<div class="principles">A roof system underlay is installed under the roof system and over the roof deck assembly. Underlays are most commonly placed over steel decks to provide a level surface for the membrane, or as a thermal barrier between the roof deck and combustible insulation.</div>
 === Underlays for Metal Roofing ===