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