Deck Overlays
Deck Overlays
| ACCEPTED PRODUCTS AND SYSTEMS FOR ROOFSTAR FIVE (5) YEAR, ROOFSTAR TEN (10) YEAR, AND ROOFSTAR FIVE (5) YEAR WATERPROOFING GUARANTEES.
This list of acceptable materials is 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
| 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.