Rigid Expanded Polystyrene Insulation Panel For Walls

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.

Rigid expanded polystyrene insulation panel for walls.

Choose this option for areas that need a good amount of strength and water resistance. 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. Also called styrofoam insulation this is the least expensive material. Rigid foam insulation commonly called styrofoam insulation is made up of expanded polystyrene or eps panels that are secured to basement walls to increase the wall s r value.

Used most widely in insulated concrete forms and structural insulated panels. Expanded polystyrene eps extruded polystyrene xps and polyisocyanurate are the most used types of rigid foam insulation. Used in roof wall floor below grade structural geofoam applications. While all foam insulation products are derived from petroleum some of the key differences include water resistance r value per inch compressive strength facings permeability to water vapor and evidently cost.

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.