Product Guide Structural Insulated Panels Behind the recommendations Related articles Behind the recommendations Related articles Structural Insulated Panels SIPS that avoid extruded polystyrene (XPS), which comes with climate concerns More about Structural Insulated Panels Structural Insulated Panels: An Efficient Way to Build Structural Insulated Panels (SIP), have been around since the 1950s but only began making inroads into the construction industry in the 1980s. No Stress Panel System for Timber Framing Polystyrene Insulation: Does It Belong in a Green Building? The Hidden Science of High-Performance Building Assemblies Any four walls and a roof make an enclosure, but for efficiency, comfort, and durability, those elements have to be meticulously designed and installed.