Jun 03, 2020 · FOAMULAR 1/4 in. x 4 ft. x 50 ft. R-1 Fanfold Rigid Foam Board Insulation Sheathing: 1 in. x 2 ft. x 48 in. R5 Radiant Acoustic Insulation Kit - STC 19 (12 sheets) - 96 sq. ft. FOAMULAR 250 2 in. x 48 in. x 8 ft. R-10 Scored Squared Edge Foam Board Insulation Sheathing: Price $