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DeWitt's DeWitt Asphalt-Saturated Cotton Membrane, 4 in., 6 in., 12 in. or 36 in. x 150 ft. Roll
Regular price $158.82Orders start at $399 — combine any items to reach the minimum. Learn more
DeWitt's DeWitt Asphalt-Saturated Cotton Membrane, 4 in., 6 in., 12 in. or 36 in. x 150 ft. Roll
DeWitt's asphalt-saturated cotton membrane is an open-mesh cotton fabric coated with oxidized asphalt, used to reinforce blister and split repairs in bituminous roofing. It comes in 4 in., 6 in., 12 in. and 36 in. widths, all 150 ft. long, in black. Each order is one roll or carton depending on width.
Key Features:
- Open mesh design: The open mesh lets bitumen penetrate for maximum adhesion.
- Cotton reinforcement: Continuous cotton yarns woven perpendicular to each other provide a long-proven reinforcing fabric.
- Asphalt saturated: Coated with an oxidized asphalt binder compatible with hot and cold bitumen systems.
- Rot resistant: The fabric is rot-resistant for lasting performance in roof repairs.
- Dimensionally stable: The membrane is dimensionally stable and free of defects.
- Easy handling: Unrolls and handles easily during normal installation.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | DeWitt's |
| Sell unit | 1 roll or carton, 150 ft. (width varies: 4, 6, 12 or 36 in.) |
| Product line | DeWitt Asphalt Saturated Cotton Membrane |
| Material | Asphalt-saturated cotton fabric |
| Color / finish | Black |
| Available colors | Black |
| Available sizes | 4 in. x 150 ft., 6 in. x 150 ft., 12 in. x 150 ft., 36 in. x 150 ft. |
| Coverage per unit | 150 ft. roll length; width varies by item |
| Intended use | Reinforcement for blister and split repairs in bituminous roof systems |
Coverage & How Much You Need:
Each roll is 150 ft. long; a 4 in. roll covers about 50 sq. ft., a 6 in. roll about 75 sq. ft., a 12 in. roll about 150 sq. ft., and a 36 in. roll about 450 sq. ft. Overlap seams per your coating system's requirements when laying multiple courses.
Fit and Compatibility:
Compatible with both hot and cold (liquid-applied) bitumen coating systems. Use under the repair mastic or coating recommended for the roof membrane being repaired.
Frequently Asked Questions (FAQ):
Q: What sizes are available?
A: Four widths: 4 in., 6 in., 12 in., and 36 in., each 150 ft. long in black.
Q: Is it compatible with cold-applied coatings?
A: Yes, it works with both hot and cold liquid-applied bitumen systems.
Q: Why an open mesh?
A: The open mesh allows bitumen to penetrate the fabric for the best adhesion.
Q: How much area does one roll cover?
A: At 150 ft. long, coverage ranges from about 50 sq. ft. (4 in.) to 450 sq. ft. (36 in.), depending on width.
Q: What is it used for?
A: It reinforces blister and split repairs on built-up and other bituminous roofs.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Embed the membrane in a wet bed of mastic or coating, then top-coat fully so no mesh shows; feather edges to avoid ridges. Use narrow 4 in. or 6 in. widths for seam and split repairs and the 36 in. width over larger alligatored areas. Roll it out flat and avoid wrinkles so the repair coating bonds evenly.
Follow hot-bitumen and solvent-based coating safety practices, including ventilation and skin protection, during application.
Choose DeWitt Asphalt-Saturated Cotton Membrane for proven reinforcement on your next roof repair.
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