Green Solar Manufacturing (GSM) produces Structural Insulated Panels (SIPs) using ThermaSave Technology for use in building walls, ceilings, floors, and roofs. Our panels are manufactured by injecting polyurethane foam between two surface facings. As part of each panel, the foam structural elements add tremendous strength. These panels are joined together via an embedded, patented cam-locking and tongue-and-groove system ensuring a sealed tight fit. A typical GSM 4-1/2 inch thick SIP has an R-value of R-25 or higher establishing an energy efficient and cost effective envelope.