It provides r values that range from 3 6 to 4 2 per inch.
Rigid expanded polystyrene insulation panel for walls.
Expanded polystyrene eps extruded polystyrene xps and polyisocyanurate are the most used types of rigid foam insulation.
Thermal performance is rated at r6 6 5 per inch but don t count on that if your winters are cold for the reasons we re about to explain.
Highest average r value per dollar about 4 6 r per inch costs the least while meeting or exceeding all required building and energy codes.
Some products have reinforced facing to make them sturdier.
Expanded polystyrene eps the most versatile of the three rigid insulation options.
Used in roof wall floor below grade structural geofoam applications.
Pir polyiso or iso is a thermoset plastic product typically produced as a foam and used as rigid thermal insulation panel most often with aluminum foil facing.
Choose this option for areas that need a good amount of strength and water resistance.
Used most widely in insulated concrete forms and structural insulated panels.