In Germany and some other countries, the polyurethane exterior wall insulation method is adopted to promote building energy conservation. One of them is a thermal insulation connecting system, which uses a non rigid polyurethane rigid foam insulation board.

This kind of insulation board is first plastered with reinforced cloth, and then coated with outer layer or protective powder. All components in the system include thermal insulation materials, adhesives, expansion screws, reinforcing cloth, mortar, etc. as a whole package. The insulation board can be attached to the outside of the wall with expansion screws and adhesives, or only with adhesives. The insulation board can be used in brick wall, concrete wall and wood wall. Insulation connection system can be used in both new buildings and old buildings. Experts recommend the use of 100 millimeter thick polyurethane foam board with a heat transfer coefficient of 0.30W/ (M2 K). Polyurethane insulation connection system is characterized by convenient structure connection, thin insulation layer, and high quality aesthetic feeling of wall surface.