Styrofoam Tongue and Groove Insulation

Dow’s Styrofoam Tongue and Groove Insulation features a tongue and groove edge treatment that helps boards fit snugly against one another, protecting against air infiltration and providing a smooth, even surface for exterior siding. With a high compressive strength, the insulation can be used for ceiling and foundation applications, as well as for exterior and interior walls, and crawl spaces. It offers an R-value of R-5 per inch) and exceptional moisture resistance.