20 Smooth Membrane

20 Smooth Membrane

Why RUBEROID® 20 Smooth Membrane?

RUBEROID® 20 Smooth is a tough, resilient modified bitumen membrane manufactured to stringent GAF specifications. Its core is a strong, resilient non-woven glass mat that is coated with flexible, SBS polymer-modified asphalt. RUBEROID® 20 Smooth is backed by GAF, a company with over 130 years in the roofing business.


  • System guarantees are available for up to 20 years1
  • Lightweight:  Installed roof designs weigh less than three pounds per square foot
  • Combines the strength of fiberglass reinforcement with the elongation characteristics of SBS-modified asphalt
  • Available as a smooth surface


  • RUBEROID® 20 Smooth is designed for new roofing and re-cover applications as well as in the construction of flashings.
  • RUBEROID® 20 Smooth is an ideal base or interply roofing membrane in modified bitumen systems.

1See applicable 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

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