F/G Base Sheet

F/G Base Sheet

F/G Base Sheet

F/G Base Sheet is manufactured from tough inorganic fiberglass mat then coated on both sides with weathering grade coating asphalt and then covered on top with white sand fines to prevent sticking in the roll. Meets ASTM D 4601-04 Type II.

Applied over the flat roofing deck or insulation as a base sheet by mechanical fasteners or hot asphalt before the application of roofing systems. This sheet is suitable for use as a vapor retarder, with a solid mopping of asphaltic material, under roof insulation or between multiple layers of insulation.

  • ModBit

Features & Benefits

  • Granular fines prevent sticking in the roll.
  • Superior pliability and dimensional stability.
  • Excellent resistance to punctures and tears.
  • Wrinkle-resistant, ensuring it lays flat for easier installation.
  • Consistent thickness of the oxidized asphalt blend coating on both sides provides enhanced weatherability.
  • Meets or exceeds ASTM D4601-04 Type II (Standard Specification for Asphalt-Coated Glass Fiber Base Sheet Used in Roofing).
  • Meets  Florida-Building Standards



Item ID Description Packaging Qty per Ctn Weight per Ctn Cover Rate
09MH75BASE F/G Base Sheet 72 324 sq ft


F/G Base Sheet can be attached to steel, concrete, and wood roof decks.
In BUR systems, F/B Base Sheet is attached to the roof deck or insulation layer using mechanical fasteners or hot asphalt. When used as a vapor retarder, it is installed with a solid mopping of asphaltic material.
F/G Base Sheet is backed by Mule-Hide Product Co.'s standard one-year materials-only warranty.