Roof deck insulation made from EPS (expanded polystyrene) flat and tapered sheets is one of the most adaptable materials for roof decks. It can be installed over a wide range of membrane materials and on over-roofing projects. It can produce positive slopes for drainage which will maintain dimensional stability as well as moisture resistance. Call Universal Foam Products now at 410-498-0000 for more details about this cost-effective product for so many roofing resolutions.