1-inch Type 4 XPS Rigid Insulation 2-ft x 8-ft

Dupont Styrofoam Type 4 XPS Rigid Insulation 1-inch x 2-ft x 8-ft. R-Value of 5.0.

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.

24 sheets per bundle.