Deck Overlays

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Deck Overlays


Division C - Accepted Materials


Deck Overlays

Accepted Materials for a RoofStar Guarantee

The tables and products shown below provide basic material data and links to more information about the materials, including manufacturers' published Technical Data sheets, but this information is not intended for use as a comparison of material performance or quality. It is the sole responsibility of the Design Authority to assess the performance capability and material suitability for specific design requirements.

The materials listed are those which have been accepted by the RoofStar Guarantee Program (RCABC Guarantee Corp., or RGC) for use in a roof or grade-level waterproofing system that will qualify for a RoofStar Guarantee. The acceptance of these materials by the RGC (RoofStar Guarantee Program) in no way reflects on the quality or performance of other materials not listed.

The materials and guideline specifications are listed under the name of the manufacturer and/or supplier of the primary membrane material, with the exception of BUR membranes for which the reader will find RoofStar Guarantee Program guidelines on traditional built-up roofing systems (BUR) incorporating organic and glass felt primary membranes.

Gypsum and Composite Overlay Boards

Deck overlays are materials installed over decks to render the surface suitable for waterproofing materials. Click on a manufacturer's name to see the full list of their products accepted for use in the RoofStar Guarantee Program

* Use treated plywood over concrete deck surfaces
Manufacturer Product Name Product Type Thickness
mm (in.)
Weight
(lb/square foot)
Comp. Strength
(psi, nominal)
Acceptable
Application
Plywood Plywood overlay 12.7 (1/2) min. Variable - All decks*
Georgia-Pacific Canada Ltd. DensDeck Roofboard Moisture-resistant gypsum core board 6.4 (1/4) 1.100 500-900 All decks
Georgia-Pacific Canada Ltd. DensDeck Roofboard Moisture-resistant gypsum core board 12.7 (1/2) 1.950 500-900 All decks
Georgia-Pacific Canada Ltd. DensDeck Roofboard Moisture-resistant gypsum core board 15.9 (5/8) 2.500 500-900 All decks
Georgia-Pacific Canada Ltd. DensDeck® Prime with EONIC Roof Board Moisture-resistant gypsum core board 6.4 (1/4) 1.150 900 All decks
Georgia-Pacific Canada Ltd. DensDeck® Prime with EONIC Roof Board Moisture-resistant gypsum core board 12.7 (1/2) 1.975 900 All decks
Georgia-Pacific Canada Ltd. DensDeck® Prime with EONIC Roof Board Moisture-resistant gypsum core board 15.9 (5/8) 2.550 900 All decks
USG (CGC) SecureRock Securerock Gypsum Fibre Roof Board Moisture-resistant gypsum core board 6.4 (1/4) 1.570 1800 All decks
USG (CGC) SecureRock Securerock Gypsum Fibre Roof Board Moisture-resistant gypsum core board 9.5 (3/8) 1.960 1800 All decks
USG (CGC) SecureRock Securerock Gypsum Fibre Roof Board Moisture-resistant gypsum core board 12.7 (1/2) 2.760 1800 All decks
USG (CGC) SecureRock Securerock Gypsum Fibre Roof Board Moisture-resistant gypsum core board 15.9 (5/8) 3.200 1800 All decks
USG (CGC) SecureRock Securerock Glass-Mat Roof Board Moisture-resistant gypsum core board 6.4 (1/4) 1.200 700-1000 All decks
USG (CGC) SecureRock Securerock Glass-Mat Roof Board Moisture-resistant gypsum core board 12.7 (1/2) 2.000 700-1000 All decks
USG (CGC) SecureRock Securerock Glass-Mat Roof Board Moisture-resistant gypsum core board 15.9 (5/8) 2.700 700-1000 All decks

Accepted Materials

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