GreenGuard 2" 4x8 XPS Insulation 25 PSI R-10

GreenGuard XPS is a closed-cell foam. This tight configuration gives it the highest water resistance of commonly available insulations.

Water passing through foam decreases the foam’s effectiveness as an insulator as well as opens up the opportunity for damage to the building. This is why XPS is the standard product for many applications below-grade as well as above-grade walls and protected membrane roofs or plaza decks.