GAF Base Sheet Premium Fiberglass, 3 SQ

The extra strength #75 Base Sheets offer excellent nail-holding ability, as well as superb tensile strength and resilience with no bleed through, reducing risks of splitting and cracking of the membrane. They will not rot, curl, or shrink and are dimensionally stable for improved membrane performance. The sealed sheets also serve as an effective flame retarder for the application of torch-applied modified bitumen membranes.