HomeAll Products1/2" FOAM BOARD1/2" x 4' x 8' - Square Edge, FOAMULAR¨ 150 R-3 (15 psi) Extruded Polystyrene Foam Board Insulation To Place OrderCall: 906-374-0097 Visit: Baker Building Supply, LLC N7008 County Road 577 - Suite B Ingalls, MI 498481/2" FOAM BOARD$14.98PriceQuantity*FeaturesFilm-faced for increased durabilityDoesn't absorb waterLightweight and easy to cut20% recycled contentProvides a continuous layer of insulation, sealing buildings from air and moisture intrusion in above and below grade applicationsCommonly referred to as XPS foam boardMaintains 90% of R-value for the lifetime of the buildingFor above grade or below grade applicationFor use below concrete slabs, use a 25 PSI or greater foam boardSquare edge