Insulfoam is a Carlisle Construction Material Company (NYSE: CSL), and is the nation's largest manufacturer of block-molded expanded polystyrene (EPS). For over 50 years, Insulfoam has been enabling building professionals to construct high-quality building insulation systems at a minimal cost. With the widest range of faced, laminated and standard high-performance EPS insulation products Insulfoam has the right products for your needs while still providing the highest R-Value per dollar over any other rigid insulation.