R-10 (25 PSI) Owens Corning® FOAMULAR® 250 Extruded Polystyrene Foam Board Insulation 2" x 4' x 8' - Square Edge R-10 (25 PSI) Owens Corning® FOAMULAR® 250 Extruded Polystyrene Foam Board Insulation 2" x 4' x 8' - Square Edge Model Number: 1130935 Menards ® SKU: ...