What is a SIP?
SIP stands for Structural Insulated Panel. Most SIPs consist of two layers of wood sheathing laminated to a foam core. Some SIPs come with other facing materials: metal, drywall, fiberboard, even plastic. When installed in a home, the SIP provides both structure and insulation. While most commonly used in walls, SIPs can also serve as load-bearing floor, ceiling and even foundation components. Most SIPS are designed carry the entire range of structural loads in a building; however, SIPs with one drywall facing are just used as cladding panels around timberframe structures.