Under Slab
Return to House Overview >> With a compressive strength of 25 psi, FOAMULAR® 250 rigid foam insulation is an ideal choice to withstand weight for under slab applications. FOAMULAR insulation offers excellent moisture resistance so it won't lose any insulating power (R-value) even after long-term exposure to wet soil. Its rugged construction resists the effects of acids and other decaying elements in the soil.