Built for strength and long-term performance, this 1" DuPont™ XPS insulation board delivers reliable R-5 thermal resistance with a 25 PSI compressive strength rating—making it a go-to choice for demanding residential and light commercial applications. Its closed-cell extruded polystyrene (XPS) core provides consistent insulation value and moisture resistance, even in below-grade or high-load environments. Ideal for foundations, slabs, and wall systems, this board offers durability builders trust and efficiency homeowners appreciate.
