About RUBEROID® HW Granule FR Membrane

RUBEROID® HW Granule FR Membrane is a tough, fire-retarding SBS modified bitumen membrane that can be installed without the use of hot asphalt. Its core is a strong, resilient, non-woven polyester mat that is coated with an inherently fire-retardant polymer modified asphalt and surfaced with mineral granules.

  • Typical system guarantees available for up to 15 years; select system constructions available with up to 20-year guarantee coverage1
  • Polyester mat core allows it to resist splits and tears due to its pliability and elongation characteristics
  • RUBEROID® HW Granule FR is backed by GAF, a company with over 130 years in the roofing business
  • No coatings required for Class A ratings from UL and FMRC 

1See applicable warranty or guarantee for complete coverage and restrictions.

Features & benefits

Product Documentation

View All Documents
RUBEROID® HW Granule FR Membrane

SBS, APP & BUR roof system product comparisons

Any discussion on asphaltic roofing will involve one or more of these three terms: SBS (Styrene-Butadiene-Styrene), APP (Atactic Polypropylene), and BUR (Built-up roofing). SBS and APP are polymers with unique characteristics, and membranes made with them are classified by ASTM numbers, types and grades. BUR is an assembly method in which multiple layers of felts are installed with hot asphalt in-between.
RUBEROID® HW Granule FR Membrane

When is an Asphaltic System the Right Choice?

With the wide variety of roofing technologies available, an asphaltic solution can be your best choice when you’re looking for multi-ply redundancy, enhanced durability, proven performance, high wind uplift and fire-rated assemblies, lower long term performance risk for issued guarantees, high compatibility with other roofing systems, and simplified owner maintenance. Architects and consultants often specify asphaltic solutions for applications such as K-12 schools, higher education low slope buildings, hospitals, data centers, and high-profile federal government projects.
Asphaltic Roofing 101 Playlist from GAF Commercial

Asphaltic Commercial Roofing 101

Proven historical performance. Time tested durability. Asphaltic roofing products are a go-to material of choice for high end low-slope buildings. Learn more about asphaltic technologies and application techniques, as well as how to decide if asphaltic is the right roofing solution for your next project.
See complete playlist

Related products

GAF Commercial brochure showing commercial roofing systems

Commercial roofing products: solutions for every roofing needs

From single-ply membranes to full system solutions, and state-of-the-art digital services to hands-on training. GAF other the range of durable, easy-to-use products and services you need to succeed.
Download Catalog

Resources for every professional

Contractor working on a commercial roof

Contractors

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

Architects & Design Pros

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

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

Find tools, documents, and training designed by GAF to help you serve your customers.
Dealer Resources