$54.99 Extruded Polystyrene Foam Board Insulation (Common: 1.5-in x 2-ft x 8-ft; Actual: 1.437-in x 1. 
Blue Board 1 1/2 x 4 x 8' - 7.5R Value - 25PSI | Basement insulation, Foam insulation board 
Homasote R-1.2 0.5-in x 4-ft x 8-ft Sound Board Unfaced Cellulose Foam Board Insulation with 
