EPS insulation provides a typical R value of 4.17 per inch at a mean temperature of 40 degrees F. Unlike that of many other insulation products, the R value of EPS insulation is permanent because the cellular structure of the EPS contains only stabilized air. Aging had no effect upon the performance of EPS

EPS boards are available in any thickness up to 24", widths to 48" and lengths to 192". Densities can be 1.00, 1.25, 1.50, and 2.00 pcf. Click here for a list of Typical Physical Properties in PDF format.