Extruded polystyrene, XPS, is molten polystyrene that is extruded into boards. XPS has a closed-cell structure, which and gives it high compressive strength and heat resistance.
XPS is often used as insulation in projects with high strength requirements and in projects that require higher water vapour diffusion since the closed-cell structure keeps water out.
XPS is recyclable and can be melted and reused as raw material for new products. The thermal properties of XPS can help reduce the amount of energy needed to heat and cool a building.