Mineral-Surfaced Cap Sheet

Why GAFGLAS® Mineral Surfaced Cap Sheet?

The glass base resists the effects of moisture on the roof system while the aesthetically attractive granule surface provides an ultra-violet protective surface and requires no additional surface coatings. UL Class A, B, or C membrane constructions are available and system guarantees are available for up to 20 years.


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.


Available Sizes

Note:  Product sizes, dimensions, and widths are nominal values and are subject to normal manufacturing/packaging tolerance and variation.
  • Lengths
    32.6' (9.9 m)
  • Widths
    39.4'' (1.0 m) Approx.
  • Square Feet Per Rolls
    106.9 gross sq. ft.(9.9 m²)
  • Weights
    68 lb.(30.8kg)
  • Lengths
    40.7' (12.7 m)
  • Widths
    39.375" (1.0 m) Approx.
  • Square Feet Per Rolls
    134 gross sq. ft. (12.5 m²)
  • Weights
    87.5 lb. (39.7kg)
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