ASW FireGuard RoofWrap
Roof Underlayment for Wildfire Protection & Waterproofing

Specifications
| Specification | Test Method | Value |
|---|---|---|
| Base Cloth | — | Fiberglass |
| Finish | — | Aluminum Foil |
| Weight | ASTM D3776/D3776M-20 | 4.75 oz/yd² |
| Thickness | ASTM D1777-96 | 0.0059 in |
| Water Vapor Transmission | ASTM E96/E96M-2022 | 350 g/m²/24 hrs 50 Perms |
| Water Resistance – Rain | AATCC TM35 | 60 cm |
| Water Resistance – Hydrostatic | AATCC 127 | 1,350 cm |
| Tensile Strength | ASTM D5034-21 | Warp: 110 lb/in avg Weft: 100 lb/in avg |
| Burst Strength | ASTM D774 | 179 psi |
Dimensions & Weight
| Parameter | Value |
|---|---|
| Thickness, mm | 0.15 |
| Thickness, Mills | 5.9 |
| Weight, g/m² | 161 |
| Weight, lbs/sf | 0.033 |
| Weight, oz/sy | 4.75 |
| Roll width, ft | 5 |
| Roll length, ft | 200 |
| Roll coverage, sf | 1000 |
| Weight per Roll, lbs | 33.0 |
🔥 Key Benefits
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Wildfire Defense:
Made from the same non-combustible fiberglass + aluminum materials used for emergency structure protection during wildfires. -
Radiant Heat Reflection:
Aluminum-coated fiberglass reflects radiant heat—the main cause of ignition—helping keep the roof and attic cooler. -
Weather Protection:
Blocks air and water intrusion while allowing water vapor to escape, preventing moisture buildup. -
Year-Round Energy Efficiency:
Provides added insulation—cooler in summer, warmer in winter, and moisture-free all year. -
Improved Roof Durability:
Helps prevent water penetration and structural damage, extending the lifespan of roofing systems.
🧱 Material Composition
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Woven non-combustible fiberglass fabric
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Overlaid with aluminum foil for maximum heat reflectivity
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Lightweight, flexible, and engineered for high performance
⚙️ Performance Advantages
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Combines wildfire protection, thermal reflection, and air/water intrusion resistance
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Breathable membrane allows moisture vapor to pass through to prevent rot or mold
-
Significantly outperforms conventional roof underlayment, which is combustible and not designed for wildfire exposure
-
Provides thermal insulation by reducing heat transfer into the structure
📏 Available Sizes
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Standard: 5-ft width rolls
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Optional: 10-ft width rolls (available upon request)
Suitable for a wide range of roofing applications
🛠️ Easy Installation
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Lightweight and easy to maneuver
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Installs quickly using cap nails or staples
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Apply bottom to top with simple overlapping seams