Extruded Polystyrene (XPS) - Rockal | Rockal Extruded Polystyrene (XPS) - Rockal

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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.
XPS foam board is often used for above-grade insulation applications such as walls, ceilings, attics and roofs as well as for below-grade applications such as foundations and basements. When used above-grade, it can reduce thermal bridging and improve energy efficiency.

Steps of Manufacturing:

  • It begins with basic raw material. But in the case of extruded polystyrene, the polystyrene resin beads or granules are fed into an extruder, where they are heated at very high temperatures until molten.
  • At that point, various additives are added to the molten mixture. One of those additives may be a coloring agent. XPS foam board is typically colored in a variety of colors to identify it as a particular brand.

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