XPS Rigid Insulation - 2" x 4' x 8'

This Type 3 extruded polystyrene insulation board provides dependable thermal performance with a compressive strength of 20 psi, suited for below-grade and foundation applications. Its closed-cell structure resists moisture absorption, maintaining a stable R-value even in damp conditions. The shiplap edge profile creates overlapping joints that minimize thermal bridging between panels. Designed for foundation walls, under concrete slabs, and protected membrane roofing assemblies where long-term moisture resistance and structural support are critical.