GAF FeltBuster 48-in x 250-ft 1000-sq ft Synthetic Roof Underlayment

High-quality roofing underlayment plays a vital role in preventing wind-driven rain from seeping beneath your roof’s shingles, safeguarding both your home's structure and interior. Unlike traditional asphalt felt underlayments that can easily tear and absorb moisture—resulting in unsightly wrinkling that can show through shingles—GAF FeltBuster High-Traction Synthetic Roofing Felt offers an exceptional alternative. Priced competitively with standard #15 and #30 asphalt felts, this innovative synthetic felt is virtually untearable and moisture-resistant, thus minimizing wrinkling.

Featuring a specially designed surface that enhances walkability while providing a cooler working area compared to black asphalt felts, this underlayment is part of the GAF Lifetime Roofing System. When installed with Lifetime Shingles, FeltBuster High-Traction Synthetic Roofing Felt comes with up to a Lifetime Limited Warranty.

Key Features:

- Enhanced Walkability: The unique spunbond surface offers superior traction compared to regular asphalt felts.

- Tough Synthetic Construction: It resists tearing, won’t absorb moisture, and is impervious to brittleness or oil leaching.

- Cooler Working Environment: The medium-gray surface remains up to 30 degrees cooler than standard black asphalt felts, helping to maintain comfort during installation (based on GAF testing with underlayments placed on a plywood deck at 90°F/32.2°C in direct sunlight).

- User-Friendly: The lightweight, 10-square, 48-inch (1.23 m) wide roll is easier to handle compared to the typical 36-inch (914 mm) felt rolls.

- Long-lasting Durability: Made from non-asphaltic polypropylene, it withstands the test of time (unlike traditional felts that may deteriorate).

- Aesthetic Appeal: Lies flatter than conventional felts, preventing the telegraphing of wrinkles that can detract from your roof's visual appeal.

- Peace of Mind: As part of the GAF Lifetime Roofing System, it qualifies for a Lifetime Limited Warranty when paired with Lifetime Shingles (refer to GAF’s shingle and accessory Limited Warranty for detailed coverage and restrictions).

Note: This product is water-resistant but NOT waterproof. It serves as a secondary layer of water-shedding protection beneath your primary roofing material, such as asphalt shingles. DO NOT use it as a temporary roof or “dry-in” solution to protect property or possessions.