Compared with the external wall insulation, the external wall insulation has the following advantages: 1. Wide application range External thermal insulation is suitable for industrial and civil buildings for heating and air conditioning. It can be used for both new construction and old house renovation, and has a wide application range. 2. Protect the main structure and extend the life of the building The external thermal insulation scheme is adopted, because the thermal insulation layer is placed outside the building envelope structure, buffering the stress caused by structural deformation due to temperature changes, avoiding structural damage caused by rain, snow, freeze-thaw, dry and wet cycles, and reducing The harmful effects of harmful gases and ultraviolet rays in the air on the envelope structure. Facts have proved that as long as the wall and roof insulation materials are properly selected and the thickness is reasonable, the external insulation can effectively prevent and reduce the temperature deformation of the wall and the roof, and effectively eliminate the common oblique cracks or splayed cracks on the top wall. Therefore, the external thermal insulation can not only reduce the temperature stress of the enclosure structure, but also protect the main structure, thereby effectively improving the durability of the main structure, so it is more scientific and reasonable than the internal insulation. 3. Basically eliminated the influence of "heat bridge" The use of external thermal insulation is more advantageous than the internal thermal insulation in avoiding “heat bridgeâ€, such as the boundary between the inner and outer walls, the outer wall ring beam, the structural column, the frame beam, the column, the door and window opening and the boundary between the top daughter wall and the roof panel. Thermal bridge." According to statistics, the additional thermal load of the “heat bridge†in the ground floor room accounted for 23.7% of the total heat load; the middle floor room accounted for 21.7%; the top floor room accounted for 24.3%. It can be seen that the impact of the "heat bridge" is still relatively large. The above-mentioned "heat bridge" is almost inevitable for internal insulation and sandwich insulation, and the external insulation can prevent condensation caused by the "heat bridge" portion and eliminate the additional heat loss caused by the "heat bridge". The calculation shows that under the condition of 370mm thickness of brick wall, the surrounding "heat bridge" increases the average heat transfer coefficient of the wall by about 10% compared with the heat transfer coefficient of the main part; under the condition of the thickness of 240mm brick wall, the surrounding area" The thermal bridge makes the average heat transfer coefficient increase by about 51% to 59% compared with the heat transfer coefficient of the main part, and the effect is only 2% to 5% under the thermal insulation condition of the brick wall with a thickness of 240 mm. 4. Improve the moisture condition of the wall Under normal circumstances, the inner insulation shall be provided with a vapor barrier layer. When the external thermal insulation is used, the main structural material with high vapor permeability is on the inner side of the thermal insulation layer, and the condensation analysis is carried out by the steady-state moisture transfer theory, as long as the selection of the thermal insulation material is appropriate, Condensation does not generally occur inside the wall, so there is no need to provide a vapor barrier. At the same time, due to the external thermal insulation measures, the temperature of the entire wall of the structural layer is increased, and the moisture content thereof is lowered, thereby further improving the thermal insulation performance of the wall. 5, is conducive to stable at room temperature The outer thermal insulation wall has a structural layer with a large heat storage capacity on the inner side of the wall. When the indoor is subjected to unstable heat and the indoor air temperature rises or falls, the wall structural layer can absorb or release heat, so it is favorable for the room temperature to remain stable. . 6, is conducive to improve the waterproof and airtightness of the wall Aerated concrete, concrete hollow block and other walls, when the masonry ash joints and tiles are not densely packed, the waterproof and airtightness are poor. The external thermal insulation structure can greatly improve the waterproof and airtight performance of the wall. . 7, is conducive to improving the quality of indoor thermal environment The quality of the indoor thermal environment is affected by the indoor air temperature and the surface temperature of the enclosure. If the external thermal insulation wall is used to comprehensively improve the thermal insulation performance of the wall, it is beneficial to maintain a high temperature in the indoor air and the inner surface of the wall, thereby contributing to the improvement of the indoor thermal environment. Electrical Silicon Steel Coil,Electrical Silicon Steel Sheet,Electrical Silicon Steel Cold Rolled Strip Co., Ltd. , http://www.jypicklingplate.com