Extruded Polystyrene Foam is a rigid, closed-cell thermal insulation material produced through an extrusion process that forms a continuous, fine-celled matrix. The term “Extruded Polystyrene Foam” specifically refers to foam with exceptionally low moisture uptake and high compressive strength. Because the polymer is expanded in a controlled extrusion environment, the cells remain uniform and tightly sealed. This structure results in low thermal conductivity, long-term dimensional stability, and resistance to freeze–thaw cycling. Extruded Polystyrene Foam maintains its performance even when exposed to soil moisture, making it ideal for roofing, below-grade installations, and heavy-load flooring systems.

