HW Granule FR Membrane

HW Granule FR Membrane

Why 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
  • Installed roof designs weigh less than 2 pounds per square foot
  • Specially formulated modified asphalt gives RUBEROID® HW Granule FR lasting performance
  • Specially formulated poly burn-off film allows for easy installation Heat welding allows for kettle-free operation
  • 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 


  • RUBEROID® HW Granule FR is designed for new roofing and re-covering applications as well as the construction of flashings.
  • RUBEROID® HW Granule FR is also an ideal product for repairs of built-up roofing membranes or other modified bitumen systems.   

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


Protect Your Investment

Find out about product warranties and options that may help protect your most valuable assets. 

  • System Pledge Roof Guarantee
  • Diamond Pledge NDL Roof Guarantee

Product Properties

Contact GAF Contact GAF
Professional Installation Find A Contractor
Pricing and Where to Buy DISTRIBUTORS & RETAILERS