Design Your Roof

FeltBuster® — Synthetic Roof Underlayment

Your Roof Selection

Timberline HDZ • Pewter Gray

Architectural Shingle

+$182.00 / sq.

Final roof price is calculated after we receive your roof measurements.

FeltBuster® Synthetic Roofing Felt from GAF provides a durable secondary layer of protection between your roof deck and shingles.

Designed as an upgrade from traditional asphalt felt, this lightweight synthetic underlayment helps protect the roof deck from wind-driven rain that may get beneath the shingles while providing a strong, dependable foundation for the roofing system.

Highlights:

  • Synthetic roof underlayment
  • Upgrade from traditional asphalt felt
  • Provides a secondary layer of roof deck protection
  • Helps protect against wind-driven rain
  • Durable and tear-resistant construction
  • Lightweight for efficient installation
  • Lies flatter than typical asphalt felt for a cleaner installation
  • Designed for use with compatible GAF roofing systems

An added layer of protection beneath your shingles — because a complete roofing system protects your home from the deck up.

FeltBuster® is a water-resistant underlayment and is not intended to serve as the primary roof covering or as a substitute for leak barrier protection where required. Installation requirements vary by roof design, local building codes, and GAF specifications.