In the past, the outer wall should not only bear the load but also play the role of heat preservation, so the thickness of the outer wall must be thicker. After using high-efficiency thermal insulation materials, the thick wall can be thinned. However, if internal insulation is used, the thinner the load-bearing wall and the thicker the insulation layer, the more serious the thermal bridge problem will be. In cold winter, the thermal bridge will not only cause extra heat loss, but also make the inner surface of the external wall wet, dewy and even moldy and dripping, while the external insulation does not have this problem. Because thermal bridge is avoided by external insulation, the heat loss of external insulation is reduced by about 1/5 compared with that of internal insulation under the condition of using insulation materials with the same thickness, thus saving energy.

(2) It is beneficial to make the building warm in winter and cool in summer. After external insulation, due to the large heat capacity of the internal solid wall, more heat can be stored indoors, which slows down the indoor temperature change caused by solar radiation or intermittent heating, making the room temperature more stable and life more comfortable; It also makes good use of the "free heat" generated by solar radiation heat, human body heat dissipation, household appliances and cooking heat dissipation, which is conducive to energy saving. In summer, the external insulation layer can reduce the entrance of solar radiation heat and the comprehensive influence of outdoor high temperature, thus reducing the internal surface temperature and indoor temperature of the external wall. It can be seen that the external thermal insulation of the external wall is beneficial to make the building warm in winter and cool in summer.

(3) Reduce the damage and prolong the service life of the building.

Internal brick walls or concrete are protected due to external thermal insulation. With the constant change of outdoor climate, the temperature inside the wall changes greatly, which occurs in the external insulation layer, so that the temperature inside the main wall increases in winter, the humidity decreases, the temperature changes relatively gently, and the thermal stress decreases. Therefore, the risk of cracking, deformation and damage of the main wall is greatly reduced, and the service life is greatly prolonged.

(4) It is beneficial to the reinforcement and decoration in the later stage of construction.

It is difficult to adjust and hang objects on the wall with internal insulation, and even it is quite difficult to install curtain boxes and radiators. In the renovation of old houses, there are many troubles such as moving, construction disturbing people and even temporary relocation, which will also reduce the use area. External thermal insulation can avoid these problems. When the external wall must be decorated or strengthened, it is more economical and beneficial to increase the external insulation.

(5) It will not affect the construction progress of indoor engineering. At present, many families in our country usually decorate their new houses first. In the process of decoration, the internal insulation layer of the house is often destroyed. This problem does not exist when external insulation is used. External thermal insulation is beneficial to speed up the construction progress. If internal insulation is used, the interior decoration and heating installation of the house must wait until the internal insulation is completed, but the external insulation can be used at the same time as the indoor engineering.

(6) both practical and beautiful.

External wall insulation can make the building more beautiful. As long as the facade design of the building is well done, the appearance of the building will be excellent. Especially in the renovation of old houses, external insulation can greatly change the appearance of houses.

(7) Wide application range.

External thermal insulation is suitable for both heating buildings and air-conditioned buildings; Suitable for civil buildings and industrial buildings; Applicable to both new buildings and existing buildings; It can be used for both low-rise and multi-storey buildings and high-rise buildings.

(8) The comprehensive economic benefits are very high.

Although the cost per square meter of external insulation project is relatively higher than that of internal insulation, as long as the technology is properly selected, the cost per unit area is not high. In particular, the use area of external insulation is increased by nearly 2% compared with that of internal insulation, which actually reduces the cost per unit area. Coupled with a series of benefits such as energy saving and thermal environment improvement, the comprehensive benefits are very significant.

The above are the eight advantages of external wall insulation summarized by the integrated board of Xi 'an Yong 'an Building. I hope it will help everyone.