Multi-purpose STYROFOAM™ Brand SM Insulation Extruded Polystyrene is especially suited for foundations, slabs, crawl spaces, interior basements, geotechnical and other in-ground insulation applications. The Type 4 extruded polystyrene insulation helps protect foundation damp-proofing and waterproofing, especially during backfilling and provides a secondary barrier against groundwater leakage.
STYROFOAM™ Brand SM Insulation also provides energy-efficient performance in many other types of commercial and residential applications, including attics and ceilings.

Royal Building Supplies carries SM Styrofoam from DOW Canada.

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