Minimize heat loss and maximize comfort! Insulate below grade exterior foundation walls and under concrete slabs with energy-saving FOAMULAR® C-300 Extruded Polystyrene Rigid Insulation. C-300 Insulation has an outstanding thermal resistance of R-5 per inch and exceptional moisture resistance. Its strong compressive strength allows for heavy loads up to 30 PSI. Manufactured using Owens Corning’s patented HYDROVAC® technology, it meets the environmental standards of the Montreal Protocol. C-300 Insulation is GREENGUARD Indoor Air Quality Certified℠. It contains at least 20% recycled content and helps designers obtain valuable LEED® credits. It’s lightweight and easy to cut and handle, which means it can be installed quickly for maximum onsite efficiency. To further reduce heat loss and air and water infiltration, use C-300 Insulation with shiplapped edges.

Owens Corning® FOAMULAR® NGX™ C-300 Extruded Polystyrene (XPS) Rigid Foam Insulation is a closed cell, highly moisture-resistant rigid foam board well suited to meet the needs for a wide variety of residential and commercial construction applications.