Celotex product brands - Tuff-R, Super Tuff-R, Sturdy-R and Thermax Insulating Sheathing; HY-Therm Nail Line Roof Insulation; Celo-Vent Insulated Shingle Deck; and Tuff-Wrap Air Infiltration Barrier - ...

Plywood became a widely used building material for roof and wall sheathing (replacing tongue and grove boards) during this era, as did pressed-fiber wall sheathing (Celotex is one brand). Most ...