https://www.lowes.com/pd/Insulfoam-Common-1-in-x-2-ft-x-4-ft-Actual-1-in-x-2-ft-x-4-ft-1-R-3-85-Faced-Polystyrene-Garage-Door-Foam-Board-Insulation/3033248
Insulfoam R- 3.85 , 1-in x 2-ft x 4-ft Faced Polystyrene Board Insulation in the Board Insulation...
Shop Insulfoam R- 3.85 , 1-in x 2-ft x 4-ft Faced Polystyrene Board Insulation in the Board Insulation department at Lowe's.com. With the highest R-value per...