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
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
Woven non-combustible fiberglass fabric
Overlaid with aluminum foil for maximum heat reflectivity
Lightweight, flexible, and engineered for high performance
⚙️ Performance Advantages
Combines wildfire protection, thermal reflection, and air/water intrusion resistance
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
Standard: 5-ft width rolls
Optional: 10-ft width rolls (available upon request)
Suitable for a wide range of roofing applications
🛠️ Easy Installation
Lightweight and easy to maneuver
Installs quickly using cap nails or staples
Apply bottom to top with simple overlapping seams