Products / DEXcell FA Glass Mat Roof Board
DEXcell FA Glass Mat Roof Board
Class A fireDEXcell FA Glass Mat Roof Board is the fully-adhered version of National Gypsum's glass-mat gypsum roof board, with heavy-duty coated fiberglass facers for adhesion, used as a cover board under fully adhered single-ply, cold-applied modified bitumen, fluid-applied, metal and spray foam roofs and to sheathe the roof side of parapet and penthouse walls. The submittal sheet prints 1/4, 1/2 and 5/8 inch boards, 900 psi compressive strength, 23 to 25 perms, UL Class A to unlimited slope per UL 790, FM Class 1, compliance with FM 4450 and FM 4470, Type X for 5/8 inch, and manufacture to ASTM C1177.
Manufacturer
Product line
DEXcell
Fire rating
Class A
Standards met
ASTM C1177FM 4450FM 4470UL 790
Status
active
Spec sheet
Sources
- goldbondbuilding.com verified 2026-09-26
- nationalgypsum.widen.net verified 2026-09-26