$57.99 Blue Board 1 1/2 x 4 x 8' - 7.5R Value - 25PSI | Basement insulation, Foam insulation board 
1/2 in x 4 ft x 8 ft DOW STYROFOAM Extruded Rigid Insulation Board at Colonial Materials
Cellofoam 1-1/2 in. x 4 ft. x 8 ft. R-5.9 Polystyrene Foam Insulation Board-125755 - The Home Depot
