What is XPS? Expanded Polystyrene, referred to as XPS, is a closed cell insulation product commonly used in remodeling and new construction applications. Due to the manufacturing process, XPS insulation is typically available only in standard dimension square or rectangular boards.

What is XPS foam made of?

What Is Extruded Polystyrene (XPS)? XPS foam board is a rigid thermoplastic material manufactured from polystyrene. Polystyrene is a synthetic, hydrocarbon polymer derived from benzene and ethylene, two petroleum products.

Is XPS foam styrofoam?

Since its discovery in 1941, Styrofoam™ Brand XPS Insulation has a long and rich heritage as a sustainable building product, insulating to meeting core thermal, moisture, air and vapor performance requirements through its rigid foam board technology.