4-inch Type 4 XPS Rigid Insulation 2-ft x 8-ft PSL Hanger 8 square feet per bag

8 square feet per bag

This flexibility ensures the expected R-value is achieved and maintained

Self-sealing when penetrated with self-tapping screws

Designed to complement other decorative elements

Installed with screws

4-inch Type 4 XPS Rigid Insulation 2-ft x 8-ft PSL Hanger 8 square feet per bagDupont Styrofoam Type 4 XPS Rigid Insulation 4 inch x 2 ft x 8 ft. R Value of 20. Compressive strength of 30psi. 8 sheets per bundle. DuPont Styrofoam Brand SM30 Extruded Polystyrene Foam Insulation is ideal for use in foundations, floor slabs, attics and crawlspaces, where it resists water pickup a characteristic that allows it to maintain its high R value.