GAF Tri-Ply #75 Base Sheet Roll

A premium base sheet for low-slope roofing systems, built on a strong glass mat coated on both sides to resist asphalt bleed-through. Designed for cold-applied, hot-asphalt, or mechanically attached installations, it offers high tensile strength for crack and split resistance.

Key Features:

• Versatile Application: Install with cold asphalt adhesive, hot asphalt, or mechanical fasteners in all climates
• Durable Glass Mat: Closed-sheet design helps prevent asphalt bleed-through and promotes long-term performance
• High Strength: Excellent tensile strength for superior nail-holding and resistance to splitting/cracking
• Flexible Use: Functions as a base or interply membrane in BUR systems
• Tested & Approved: Meets ASTM D4601 Type II; FM Approved; Miami-Dade and UL classified for Class A assemblies

Specifications Table:

Frequently Asked Questions (FAQ):

Q: What size area does one roll cover?
A: Each roll covers approximately 300 sq ft (3.3 ft W x 97.5 ft L).

Q: Is this waterproof by itself?
A: It is water resistant but not waterproof on its own; use as part of a complete low-slope roofing system.

Q: How can it be installed?
A: It can be cold-applied with asphalt adhesive, hot-asphalt applied, or mechanically attached.

Q: Can it be used as an interply layer?
A: Yes, it can serve as either a base sheet or an interply membrane.

Q: Does it carry a warranty?
A: Yes, it has a 10-year limited warranty; see manufacturer for details.

Structured strength for streamlined rooftops

This base sheet lays a refined foundation, giving low-slope roofs a clean, confident start. The robust glass mat core is the quiet hero—sleek, strong, and impeccably composed. Pair it with complementary ply and cap sheets to create a cohesive, high-performance silhouette. It’s an essential layer for a polished, enduring roofscape.

Build a stronger low-slope roof—add the Tri-Ply #75 Base Sheet to your project today.