insulation available. It has the same R-Value per inch as fiberglass insulation but in rigid sheet form. The owner of this metal building in Crosby, Texas wanted R-13 insulation for the roof of his shop to help maintain a level of comfort year round. The EPS panels have an R-Value of 4.35 per inch. In order to eliminate waste and speed up the installation, the 120 EPS panels were delivered precut to 3” x 48” x 57” so they would rest on the flanges of the I-beams. The same thing can be done to insulate side walls, by cutting the EPS panels to fit between the purlins.
9 lb density expanded polystyrene (EPS) is the most economical rigid