Built-Up Roofing (BUR) - GAFGLAS Mineral Surfaced Cap Sheet

GAFGLAS® Mineral Surfaced Cap Sheet


GAFGLAS® Mineral Surfaced Cap Sheet is an asphalt-coated glass fiber mat cap sheet surfaced with mineral granules.


GAFGLAS® Mineral Surfaced Cap Sheet is used as the surfacing ply in the application of hot applied built-up roofs and as a top ply in base flashing construction.


  • Durability — glass base resists the effects of moisture on the roof system

  • Granule surface provides an ultra-violet protective surface

  • Code approvals — UL Class A, B, or C membrane constructions are available

  • Aesthetically attractive; requires no additional surface coatings

  • System guarantees are available for up to 20 years

Applicable Standards
Meets ASTM D3909
FM Approved
Miami-Dade County Product Control Approval
State of Florida Product Approval
UL/ULc Listed

Product Specifications (Nominal)
Roll Size 1 square (107 gross sq. ft.) (9.9 m2)
Roll Length 32.6' (9.9 m)
Roll Width 39.375' (1.0 m)
Approx. Roll Weight 68 lbs (30.8 kg)


All documents are U.S. English unless otherwise noted

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