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For Homeowners


WeatherLock™ G Granulated Self-Sealing Waterproofing Barrier

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Extra protection against weather and storms. Use WeatherLock™ G Granulated Self-Sealing Waterproofing Barrier on the entire roof deck as a secondary water barrier under asphalt shingles, wood shakes and quarry slate roof assemblies. This provides additional security against leaks caused by storms, wind-driven rain and shingle blow-offs. WeatherLock™ G also has a taped selvedge edge to offer improved seal between courses and peace of mind that your roof has an extra layer of protection.

Area 2 sq. roll – 184 sq. ft. (56.1 m2)
Length 2 sq. roll – 66.7 ft. (20.3 m)
Width 3 ft. (.91 m)

Applicable Standards

  • ASTM D1970
  • ASTM E108/UL 790 (Class A Fire Resistance)^

* See actual warranty for complete details, limitations and requirements.

^ Underlayment is tested as part of a rood assembly that includes wood decking, underlayment and shingles.

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