About GAF Premium Fabric

GAF Premium Fabric is a 100% polyester reinforcement for penetrations. It easily conforms around penetrations and improves strength while maintaining flexibility (formerly known as HydroStop® PremiumCoat® Fabric).

Product Documentation

Resources for every professional

Contractors

We’re building new plants for greater capacity, and better systems for faster response and greater visibility.
Contractor Resources

Architects & Design Pros

We’re building better, faster, more accurate access to the information you need.
Design Resources

Property managers & owners

Whether you manage one property or many, we’re building the products and programs you need to reroof, restore, or maintain your investment.
Building Resources
GAF employee outside flatbed truck with shingles

Roofing suppliers

Whether you manage one property or many, we’re building the products and programs you need to reroof, restore, or maintain your investment.
Dealer Resources