Riverhead Building Supply is an authorized dealer of Dow insulation. Dow has a large portfolio of rigid insulation solutions for an array of climate conditions and applications. Dow rigid insulation board manages moisture and optimizes energy efficiency. Visit our Long Island or Rhode Island locations to learn more about Dow’s extensive range of highly-valued insulation products including extruded polystyrene and polyisocyanurate.

Riverhead Building Supply is a DOW Rigid Insulation retailer throughout Long Island and Rhode island