External thermal insulation of external wall is a building energy-saving treatment method which puts the thermal insulation system on the outside of the external wall to make the building wall achieve the effect of thermal insulation. In recent years, as a key development project of the Ministry of construction, external thermal insulation technology has been widely applied in cold, cold and hot summer and warm winter climate areas, and the application amount in these areas has accounted for more than 80% of energy-saving buildings.

External thermal insulation system of external wall is composed of fixed materials of thermal insulation layer and protective layer, which is suitable for construction or installation on external surface of external wall. The external insulation system can effectively improve the thermal performance of the enclosure structure, and because the temperature difference between the inner and outer surface of the structural wall is small, and the temperature difference between the inside and outside of the external insulation system is large, so that the dew point is in the insulation layer, and the influence of dew point on the building is basically eliminated. At the same time, the external insulation system can greatly reduce the effect of temperature difference on the main structure, and reduce the temperature deformation To protect the role, and can effectively block the cold and hot bridge, is conducive to the structural stability and life extension of the building.