STYROFOAM™ CLADMATE™ CM20 Insulation is a versatile, product manufactured for applications that require a high R-value (or RSI), excellent moisture resistance and high compressive strength. Insulation combines an R-value of 5.0 per inch (RSI of 0.88 per 25 mm) with high moisture resistance and a (20 psi) compressive strength (CAN/ULC S701 Type 3). Its versatility enables its use in all residential construction applications including: above and below grade, under slabs, interior and exterior applications.