Abstract：
In this paper, the thermal stability of polyurethane(core material of Polyurethane composite insulation board), model constructed walls and weather-ability of four different external thermal insulation system based on the polyurethane foam composite insulation were studied. The engineering application examples and research results showed that:(1) core material of polyurethane composite insulation board with poor thermal stability.(2) the quality problem could be solved effectively with an additional lightweight mortar layer in polyurethane composite panel system.
