ASW FireGuard RoofWrap

Roof Underlayment for Wildfire Protection & Waterproofing

ASW Roof Wrap

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