Structural Insulated Panels (SIPs)

Morris Arboretum Structural Insulated Panels
Structural Insulated Panels
Morris Arboretum Structural Insulated Panels

Structural insulated panels (SIPs) are composite building materials that combine the benefits of insulation and structural performance in a single product. They consist of a core layer of rigid insulation between two layers of structural board. The board can be sheet metal, plywood, cement, magnesium oxide board (MgO) or oriented strand board (OSB) and the core either expanded polystyrene foam (EPS), extruded polystyrene foam (XPS), polyisocyanurate foam, polyurethane foam or composite honeycomb (HSC).

SIPs combine the performance of multiple components of conventional building, such as studs and joists, insulation, vapor barrier and air barrier. The foam core of a SIP provides higher insulation values than many other insulation materials used in traditional framed construction. With SIP construction, studs and rafters do not interrupt the insulation therefore energy efficiency is increased because thermal bridging and air infiltration are greatly reduced. 

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