With the continuous improvement of building energy conservation and environmental protection requirements, countries around the world have given full attention to building energy-saving technologies. In the past 30 years, countries have done a lot of work in architectural design and construction, development and application of new building insulation materials, development and implementation of building energy conservation regulations, certification and management of building energy-saving products, not only saving a lot of energy, Significant economic benefits have been achieved while improving the environment and reducing damage to the atmospheric ozone layer. First, the origin of the external wall insulation technology Exterior wall insulation technology originated in Europe in the 1940s, first in Sweden and Germany. Second, the main form of external wall insulation and material varieties At present, the widely used external thermal insulation system is mainly a thin plastering method for external thermal insulation board. There are two kinds of thermal insulation materials: flame-retardant expanded polystyrene board and non-combustible rock wool board, all of which are coated with outer layer. . YT inorganic active wall insulation system The latest type of net insulation system, no need to add mesh cloth for paint and tile. Third, the status quo of my foreign wall insulation technology China's external wall insulation technology started in the 1980s. Over the past decade, China has gradually realized the advantages of external insulation technology on the basis of learning and introducing advanced foreign technology. Since 2002, the Ministry of Construction has successively promulgated and implemented the "External Thermal Insulation Building Structure (1)" 02J121-1 (2002-9-1), "Technical Regulations for External Thermal Insulation Engineering" JGJ-144 (2005-3-1) In addition, the construction departments of various provinces have successively issued a large number of technical specifications and standards for external thermal insulation. Fourth, my foreign wall insulation mandatory norm basis In the No. 143 Order of the Civil Building Energy Conservation Regulations, strict regulations have been imposed on the energy efficiency of our national buildings. The energy saving of civil buildings in the Ministry of Construction refers to the implementation of building energy-saving standards through the use of new wall materials in the planning, design, construction and use of civil buildings. V. Relevant regulations for the renovation and energy-saving renovation of existing building exterior walls During the “Twelfth Five-Year Plan†period, the existing buildings in the hot summer and cold winter areas will have more than 50 million square meters of residential measurement and external wall energy-saving renovation. By 2020, the urban residential buildings with renovation value in the northern heating area will be basically completed. Sixth, the advantages of building exterior wall insulation and energy-saving transformation 1. Protect the main structure and extend the life of the building. The external thermal insulation technology is adopted, because the thermal insulation layer is placed outside the building envelope structure, buffering the stress caused by the structural deformation caused by the temperature change, and reducing the erosion of the enclosure by harmful gases and ultraviolet rays in the air. 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 roof, and effectively eliminate the common oblique cracks or cracks. Therefore, the external wall insulation effectively improves the service life of the main structure and reduces long-term maintenance costs. 2. Basically eliminate the impact of "heat bridge". “Thermal bridge†refers to the main channel for heat dissipation formed at the junction of internal and external walls, structural columns, frame beams, doors and windows, and so on. For internal insulation, "heat bridge" is difficult to avoid, and external insulation can prevent condensation on the "heat bridge" part, mold on the wall, and eliminate heat loss caused by "heat bridge". 3. 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, since the main structural material with high vapor permeability is inside the thermal insulation layer, as long as the selection of the thermal insulation material is appropriate, condensation does not generally occur inside the wall. There is no need to set the vapor barrier. At the same time, after the external thermal insulation measures are taken, the temperature of the entire wall of the structural layer is increased, and the temperature content thereof is lowered, thereby further improving the thermal insulation performance of the wall. 4, is conducive to room temperature to maintain stability. The outer thermal insulation wall has a structural layer with a large heat storage capacity inside the wall. When the indoor is subjected to unstable heat, the indoor air temperature rises or falls, and the wall structural layer can attract or release heat, so it is favorable for the room temperature to remain stable. . 5. It is convenient for energy-saving renovation of old buildings. Compared with the internal insulation, the external insulation method is used to carry out energy-saving renovation of the old house. The biggest advantage is that there is no need for temporary relocation, which basically does not affect the user's indoor life and normal life. 6, can avoid the damage to the insulation layer of the decoration. During the decoration, the inner insulation layer is easily damaged, and the external insulation can avoid this problem. 7. Inconvenience caused by the inconvenience caused by the construction of the external wall insulation and energy-saving renovation of existing buildings The external thermal insulation technology is conducive to the sustainable development of the country, prolonging the service life of the building, and helping the households to save money. However, in the process of energy-saving renovation of existing buildings, it is bound to bring inconvenience to the residents' lives, such as air-conditioning movement, inconvenience during construction, construction noise, etc., but the impact is short-lived, and the comfortable living environment for the majority of residents It will be lifelong. kaiping aida sanitary ware technology co.,ltd , https://www.kpaidafaucets.com