GAFGLAS® #75 Base Sheet is a premium roofing base sheet constructed with a strong glass mat that is coated on both sides to assure a closed-sheet design to prevent asphalt bleed-through. The sealed sheet also serves as an effective flame retarder for the application of torch-applied modified bitumen membranes.

GAFGLAS® #75 Base Sheet is engineered for use in the construction of GAFGLAS® built-up and RUBEROID® modified bitumen roofs. It is suitable for nailable specifications, such as plywood, where bleed-through is a concern.

• Roll Size 3 squares (320.1 gross sq. ft.) (29.7 m2)
• Roll Length 97.5' (29.7 m)
• Roll Width 39.375' (1.0 m)
• Approx. Roll Weight 68 lbs (30.8 kg)

For additional technical resources please refer to the GAF 75# base data sheet.