GIC fabricates styrofoam / polystyrene insulation from XPS PIB (eXtruded PolyStyrene Pipe Insulation Billet), a rigid thermoplastic foam manufactured by an extrusion process that forms a uniform, void-free, closed cell structure. This structure, along with the naturally water-repellent nature of the polystyrene resin, gives XPS PIB products high compressive strength, low friability and excellent resistance to water vapor and water absorption from freeze-thaw cycling.