Deck Overlays

ACCEPTED PRODUCTS AND SYSTEMS FOR ROOFSTAR FIVE (5) YEAR, ROOFSTAR TEN (10) YEAR, AND ROOFSTAR FIVE (5) YEAR WATERPROOFING GUARANTEES. The table or tables shown below provide basic material data and links to more information about the materials, including manufacturers' published Technical Data sheets, but this information not intended for use as a comparison of material performance or quality. It is the sole responsiblity 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 RCABC Guarantee Corp. (RGC) upon application by the manufacturer/supplier, in compliance with RGC Policy A-041, and are materials for which RoofStar Guarantee Certificates are available. The acceptance of these materials 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; except that RGC has issued the 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 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
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 Coated Ultralight Glass Mat Roof Board*	6.4 (1/4)	1.200	700-1000	700-1000	All decks
USG (CGC) SecureRock	Securerock Coated Ultralight Glass Mat Roof Board*	12.7 (1/2)	1.700	700-1000	700-1000	All decks
USG (CGC) SecureRock	Securerock Coated Ultralight Glass Mat Roof Board*	15.9 (5/8)	2.200	700-1000	700-1000	All decks
USG (CGC) SecureRock	Securerock Ultralight Glass Mat Roof Board	Moisture-resistant gypsum core board	6.4 (1/4)	1.200	700-1000	All decks
USG (CGC) SecureRock	Securerock Ultralight Glass Mat Roof Board	Moisture-resistant gypsum core board	12.7 (1/2)	1.700	700-1000	All decks
USG (CGC) SecureRock	Securerock Ultralight Glass Mat Roof Board	Moisture-resistant gypsum core board	15.9 (5/8)	2.200	700-1000	All decks

^* Indicates conditions of acceptance. See the product page for more information.

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Accepted Materials

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