With the WarmWall CM system, the risk of condensation in the wall cavity is greatly reduced. Additionally, the system joints are taped, reducing air infiltration. These WarmWall CM features and installation techniques can help prevent the walls, sheathing and studs from rotting. Polyiso insulation, also known as polyisocyanurate, is a thermoset closed cell rigid foam plastic insulation. Liquid raw materials, which expand and become light yet strong, are applied between engineered facing materials as polyiso is manufactured in a continuous process.
Facings provide strength, improve rigidity and enhance thermal performance.
Polyiso is most commonly supplied as 4x8' or 4x9' sheets in a range of thicknesses. Polyiso is tough, dimensionally stable and easy to handle on the job site. The Polyisocyanurate Insulation Manufacturers Association produces educational and technical materials in an effort to address frequently asked questions about polyiso insulation. PIMA's educational and technical materials are published to help expand the knowledge of builders, architects, and specifiers, as well as to build consensus on the performance characteristics of polyiso. Individual companies should be consulted for specifics about their respective products.