Astm c518 thickness 3 0 0 53 thickness 4 0 0 70 1 thickness 5 0 0 88 40 f 4 4 c mean temperature.
Owens corning polystyrene insulation r value.
Owens corning s patented hydrovac process technology makes the unique closed cell structure of foamular extruded polystyrene insulation highly resistant to moisture retaining its long term r value year after year even following prolonged exposure to water leakage humidity condensation groundwater and freeze thaw cycle.
The r value for foamular xps insulation is provided from testing at two mean temperatures 40ºf and 75ºf and from two aging conditioning techniques 180 day realtime aged as mandated by astm c578 and a method of accelerated aging sometimes called long term thermal resistance lttr per can ulc s770 03.
Owens corning foamular 250 rigid extruded polystyrene xps foam insulation is the ideal insulation for exterior walls featuring superior moisture prevention and a lightweight feel.
Owens corning foamular 150 rigid extruded polystyrene xps foam insulation is the ideal insulation for exterior walls featuring superior moisture prevention and a lightweight feel.