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GAF SA Vapor Retarder XL40 69 in. x 105 ft. Self-Adhered Membrane Roll
Regular price $756.60GAF SA Vapor Retarder XL40 69 in. x 105 ft. Self-Adhered Membrane Roll
GAF SA Vapor Retarder XL40 is a self-adhered SBS modified bitumen vapor retarder membrane supplied as a 69 in. x 105 ft. roll covering about 6 squares. It is applied to the roof deck to control vapor drive in low-slope assemblies. Install it beneath compatible GAF modified bitumen membranes and roofing insulation.
Key Features:
- Self-adhered: SA membrane adheres directly to the substrate without hot asphalt or torch.
- XL40 sheet: XL40 is the vapor retarder sheet in the GAF SA line.
- Six squares per roll: Each 69 in. x 105 ft. roll covers approximately 6 roofing squares.
- SBS modified bitumen: An SBS modified bitumen membrane for low-slope assemblies.
- Vapor control: Functions as the vapor retarder layer within the roof system.
- Deck application: Applied to the prepared deck as the first layer of the roof assembly.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | GAF |
| Sell unit | 1 roll, 69 in. x 105 ft. |
| Product line | GAF SA Vapor Retarder |
| Available sizes | 69 in. x 105 ft. (6 squares per roll) |
| Material | SBS modified bitumen self-adhered membrane |
| Dimensions | 69 in. wide x 105 ft. long |
| Coverage per unit | 6 squares per roll |
| Intended use | Self-adhered vapor retarder for low-slope roofing assemblies |
Coverage & How Much You Need:
One roll is 69 in. x 105 ft. and covers approximately 6 squares (600 sq ft) at its stated coverage. Size the job from the deck area, adding rolls for laps and detail work at edges, penetrations and curbs.
Fit and Compatibility:
Use beneath compatible GAF low-slope membrane systems per the assembly specification. The overlying membrane, insulation and primers are sold separately.
Frequently Asked Questions (FAQ):
Q: What is included?
A: One roll of GAF SA Vapor Retarder XL40, 69 in. x 105 ft., covering about 6 squares.
Q: How many rolls do I need?
A: Divide the deck area by 6 squares per roll and add material for laps and details.
Q: How is it installed?
A: It is rolled out and adhered to the prepared deck as a self-adhered sheet, no hot asphalt or torch required.
Q: Where does it go in the assembly?
A: It is the vapor retarder layer, installed at the deck beneath insulation and the membrane.
Q: Is primer required?
A: Refer to the manufacturer's installation instructions for substrate preparation and priming requirements.
Q: What membrane goes over it?
A: A compatible GAF low-slope membrane per the roof specification, sold separately.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
A self-adhered vapor retarder eliminates kettle work on the deck, which is a real advantage on occupied or congested low-slope jobs. Ensure the deck is clean, dry and primed where required, and roll laps firmly for a continuous retarder. Confirm vapor drive requirements with the roof assembly design before ordering.
Self-adhered membranes can be slippery before and during install; maintain footing, watch open laps, and follow the manufacturer's substrate preparation and fall-protection requirements.
Order GAF SA Vapor Retarder XL40 rolls today for a self-adhered low-slope vapor retarder layer.
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