EPS (expanded polystyrene) is becoming the most popular insulation / void fill material for green roof construction. Available in densities from 10 psi to 60 psi, it has the same compression strength as extruded polystyrene at a fraction of the cost. EPS panels are available from 1” to 48” thick making installation much faster. As more cities are requiring green roofs for multistory residential and business construction, architects are turning to EPS for a high quality readily available insulation material.
