RAYCORE Structural Insulated Panels -SIPs ®, manufacturer of Energy Saving Structural Insulated Panels - SIPs since 1987. (Visit RAYCORE's website at https://raycore.com )These innovative insulated wall panels and insulated roof panels are sold throughout the United States, Canada and worldwide. RAYCORE SIP Panels consist of superiorly insulating closed cell polyurethane foam insulation, integrated studs and a radiant air barrier. Lightweight, easy to use, even a Do-It-Yourself-er can use them. Uses common framing practices – no special plans. If you can build with sticks, you can build with RAY-CORE SIPs® building panels. This affordable - half the price - energy saving SIP panel, will save you money for the lifetime of your structure. LIFETIME Warranty!