Choose this option for areas that need a good amount of strength and water resistance.
Rigid expanded polystyrene insulation panel for walls.
Some products have reinforced facing to make them sturdier.
Expanded polystyrene eps extruded polystyrene xps and polyisocyanurate are the most used types of rigid foam insulation.
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.
Used in roof wall floor below grade structural geofoam applications.
Also called styrofoam insulation this is the least expensive material.
Expanded polystyrene eps the most versatile of the three rigid insulation options.
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.
Used most widely in insulated concrete forms and structural insulated panels.
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.