Celfort® 300 is a moisture resistant, rigid foam insulation that can be installed below grade on the exterior of a home or in the basement under concrete floor slabs. With a thermal resistance of R-5 per inch of thickness it will help save money on home energy bills. Celfort® 300 is lightweight, durable and impact resistant making it easy to handle, saw, cut and score.

Celfort® Extruded Polystyrene Insulation Board has been tested for its ability to retain critical structural properties in a severe freeze/thaw environment. It has been demonstrated that it retains its load carrying ability (min. compressive resistance) after 1,000 freeze/thaw cycles carried out in accordance with ASTM C-666, procedure A. Procedure A involves alternating freeze/thaw cycles with the test specimen totally submerged in water and exposed to freezing temperatures around the entire specimen. Freezing conditions are a factor in all parts of Canada. Freeze/thaw cycles testing helps to determine which insulations have the correct physical characteristics to withstand the severe site conditions of Canada.