$56.99 Owens Corning® Foamular® R-3 Extruded Polystyrene Foam Board Insulation 1/2 x 4' x 8' at Menards®
R-6 Expanded Polystyrene Foam Board Insulation 1-1/2 x 14-1/2 x 48 - 6 Pack at Menards®
Shop Dow Extruded Polystyrene Foam Board Insulation (Common: 2-in x 2-ft x 8-ft; Actual: 1.875 
