Expanded polystyrene (EPS) roof insulation has been used in new installation and remodeling projects for over 35 years. With the capability to be used in virtually all commercial roofing systems, the closed cell, lightweight, foam plastic insulation EPS is a popular choice.

EPS is most successful when installed correctly and can be used in modified bitumen systems, built up roofing, and single?ply membrane systems that are ballasted, mechanically fastened or fully adhered.