Styrofoam™ Brand SM30 XPS Extruded Polystyrene Insulation is a foam insulation board that meets the needs of the commercial foundation and building floor slab market. It also can be used for attics, foundations/slabs and crawlspaces in residential applications. The product’s closed-cell structure resists water pickup, enabling it to retain a high R-value over time – a necessary property in wet, below-grade commercial foundation applications. The Styrofoam™ Brand XPS product line gives you the proven thermal and moisture performance to design and build energy-efficient, resilient structures for all six sides of your commercial building. It’s lightweight and easy to install, which makes the work go faster, and it’s readily available through our wide distributor network. When and where you need it, Styrofoam™ Brand is there.