GAF GAFGLAS #75 Base Sheet 3 SQ Roll (39-3/8 in. x 97 ft. 6 in.)
Regular price $65.25#75 Roofing Base Sheet Roll
GAFGLAS® #75 Base Sheet is a premium built-up roofing (BUR) asphaltic base sheet made with a strong glass mat. Its closed-sheet design helps prevent asphalt bleed-through and can serve as a flame retarder when used under torch-applied modified bitumen membranes.
Key Features:
- Easy Installation: Rolls out flat for quicker, easier placement.
- Closed-Sheet Design: Coated on both sides to help prevent asphalt bleed-through.
- Fire Performance Support: Designed to meet UL Class A ratings and can act as a flame retarder in torch-applied systems.
- Commercial-Grade Standards: Listed/approved to multiple standards and approvals including ASTM D4601 Type II and UL/ULC listings.
- Jobsite Coverage: One 3-square roll provides 300 sq. ft. of coverage.
Specifications Table:
| Specification | Details |
|---|---|
| Product Name | GAF #75 Base Sheet 3SQ/RL |
| Product Description | GAF #75 Base Sheet 3 Square Roll |
| Category | Roofing Materials |
| Subcategory | Built-Up Roofing (BUR) Asphalt Membranes |
| Unit of Measure | RL - Roll |
| Roll Coverage | 300 sq. ft. (3 squares) |
| Roll Size (Width x Length) | 39-3/8 in. x 97 ft. 6 in. |
| Packaging | 3 SQ. Roll |
| Material / Reinforcement | Strong glass mat |
| Sheet Design | Coated on both sides; closed-sheet design to help prevent asphalt bleed-through |
| Use Case | Suitable for nailable specifications (e.g., plywood) where bleed-through is a concern |
| System Compatibility / Performance Note | Sealed sheet serves as an effective flame retarder for application of torch-applied modified bitumen membranes |
| Fire Rating Design Note | Designed to meet UL Class A ratings |
| Applicable Standards / Approvals | ASTM D4601, Type II; FM Approved; ICC ESR-1274; Miami-Dade County Approved; UL/ULC Listed |
| Manufacturer Product Number | GAF75BS |
| Manufacturer Number | 3300000 |
| Item Weight | 75 lb |
| Style | Built Up Roofing |
Frequently Asked Questions (FAQ):
Q: What is this base sheet used for?
A: It’s a BUR/asphaltic base sheet used as an underlying ply in commercial roofing systems and is also used where bleed-through is a concern (such as plywood nailable decks).
Q: How much area does one roll cover?
A: Each roll is a 3-square roll and covers 300 sq. ft.
Q: What are the roll dimensions?
A: The roll size is 39-3/8 in. wide x 97 ft. 6 in. long.
Q: Can it be used with torch-applied modified bitumen?
A: Yes—its sealed, closed-sheet design can serve as an effective flame retarder for torch-applied modified bitumen membrane applications.
Q: Does it meet recognized industry standards?
A: Yes—applicable standards/approvals listed include ASTM D4601 Type II, FM Approved, ICC ESR-1274, Miami-Dade County Approved, and UL/ULC Listed.
The Unsung Foundation of a Fearless Roof
Luxury starts with what you don’t see—the quiet, decisive layer that makes everything above it perform beautifully. This GAFGLAS® #75 base sheet brings a refined, engineered confidence with its strong glass mat and closed-sheet design that helps resist asphalt bleed-through. Think of it as the tailored lining inside a couture jacket: invisible, essential, and impeccably functional. When you’re building for longevity and elevated performance, this is the foundational move that sets the tone.
Build your roofing system on a stronger foundation—choose GAFGLAS® #75 Base Sheet for reliable coverage and commercial-grade performance.
All third party trademarks, including logos and icons, referenced on our website and product pages remain the property of their respective owners. Unless specifically identified as such, Arbor's use of third party trademarks does not indicate any relationship, affiliation, sponsorship, or endorsement between Arbor Home and the owners of these trademarks. Any references by Arbor Home to third party trademarks are to identify the corresponding third party goods.
