External wall insulation is one of the effective means to improve the building thermal environment, meet the requirements of energy saving and enhance the residential comfort. The methods of external wall insulation are mainly as follows:

　　Conventional hanging board insulation method: the hanging board or paste foam board is fixed on the existing wall surface.

　　Plastering insulation method: brush moisture-proof material on the wall, and spread on the above insulation mortar, forming a thin layer of insulation.

　　Prefabricated board insulation method: the insulation board is prefabricated and then installed on the wall.

　　Coating insulation method: the insulation coating is smeared on the wall surface to form a uniform insulation layer.

　　Different insulation practices are applicable to different areas. Good external wall insulation, can prevent indoor heat loss to outdoor, reduce heating or cooling energy consumption, reduce the energy costs of the home or business. At the same time, the external wall insulation material can effectively prevent the generation of cold and hot bridge, make the indoor temperature more stable, improve the living comfort. External wall insulation can reduce the thermal stress of the building surface under high temperature conditions in summer, which helps to reduce the cracking and cracking of the building. External wall insulation can effectively protect the wall from rain and other natural disasters, prevent the wall from aging, corrosion and other phenomena, prolong the life of the building.

　　Therefore, external wall insulation plays a very important role in energy saving, comfort and safety of buildings.