Duct Board For Ceiling Insulation?
Howdy. I closed in a porch. It has 2x4 rafters. I have some 2" pressed fiberglass (?)furnace duct board someone gave me. I'm thinking of cutting it into strips and using it between the rafters. It would still allow a 1-1/2" space above it for heat to travel from the soffit to the roof vent. The duct board has foil on one side but seems flimsy. Does my insulation plan make sense or am I heading for trouble? Thanks, Gene