Glass base sheet gbs 40.
Roofing felt base sheet.
This is asphalt enhanced with plastic or rubber polymer.
It is made of fiberglass or reinforced polyester or composite reinforcement and is saturated coated with modified bitumen asphalt.
What is a roofing base sheet.
15 astm d 4869 type i covers 432 sq ft.
Roofing felt is essential to ensure your outbuilding is ready for all weathers by providing a waterproof cover to the building s roof.
Roofing shingles and materials plus factory certified roofers including ratings from real homeowners from north america s largest roofing manufacturer.
Thursday february 21 2019.
All gmc products meet various astm standards.
Tri ply 75 base sheet is a premium roofing base sheet constructed with a fiberglass mat reinforcing that is coated on both sides to ensure a closed sheet design to prevent asphalt bleed through.
Gafglas 75 base sheet for built up roofing bur is a premium roofing sheet with a strong fiberglass mat to prevent asphalt bleed through.
Ideal for an apex flat or pent roof shed felt and roofing membrane are durable and perfect for a newly built structure or to re cover existing roofing material.
Gmc roofing felt is an industry leading superior quality authentic asphalt saturated organic felt underlayment.