A rigid foam insulation with closed-cell structure that provides thermal resistance and moisture protection in building applications.

XPS (Extruded Polystyrene Insulation) is a rigid foam insulation with closed-cell structure that provides thermal resistance and moisture protection in building applications through manufacturing processes that create uniform, dense foam boards with excellent insulating properties while maintaining structural integrity and moisture resistance. This high-performance insulation material consists of polystyrene polymer that is melted and extruded with blowing agents to create closed-cell foam boards that offer consistent R-values, dimensional stability, and resistance to water absorption. XPS insulation is critical in building construction where it provides thermal performance, moisture control, structural support, and energy efficiency, making it indispensable for foundation insulation, below-grade applications, roof systems, and any construction where high-performance insulation with moisture resistance is necessary for building envelope performance and energy conservation.

XPS insulation is utilized in various building applications and insulation systems including foundation walls where it provides thermal protection and moisture resistance below grade, basement insulation where it prevents thermal bridging and moisture problems, under-slab applications where it reduces heat loss and prevents moisture migration, roof systems where it provides thermal resistance and structural support, wall sheathing where it offers continuous insulation and thermal bridging reduction, and specialty applications including cold storage, industrial facilities, and high-performance buildings where superior insulation performance is required for energy efficiency and moisture control. Each application requires appropriate XPS selection, installation methods, and integration with other building systems based on thermal requirements, moisture conditions, and structural needs.

Manufacturing process and material properties of XPS include extrusion that creates uniform closed-cell structure with consistent density, blowing agents that create foam structure and determine insulation properties, polymer chemistry that provides structural integrity and chemical resistance, quality control that ensures consistent thermal and physical properties, dimensional stability that maintains performance under temperature and moisture variations, and surface treatments that may enhance adhesion or provide specific performance characteristics. Manufacturing quality ensures consistent insulation performance and reliability.

Fun Fact: XPS insulation was first developed in the 1940s by Dow Chemical Company, and modern XPS can maintain its R-value for over 50 years while absorbing less than 0.3% moisture by volume even when submerged.

• Extruded Polystyrene
• Attic Insulation
• Batten Insulation