What is external insulation technology?
The exterior wall thermal insulation technology places the thermal insulation system on the outside of the external wall, so that the temperature difference of the main structure is greatly reduced, the temperature deformation is reduced, the structural wall is protected, and the cold can be effectively blocked ( Thermal bridges are beneficial to extend the life of the structure. Due to its outstanding advantages, the residential industry, where building energy conservation is increasingly valued, has been rapidly developed and will have a broader market.
The superiority of the external insulation of the external wall is to put the thermal insulation system on the outside of the external wall so that the building can reach the thermal insulation construction method. As the structural layer is on the inside of the system, the external environment has little effect on it, and its high value heat storage performance is fully utilized. When the room is subjected to unstable heat waves (such as room temperature rise or fall), the structural layer can balance the temperature by absorbing heat or releasing heat, which is conducive to maintaining stable indoor temperature.
The insulation layer is located on the outside of the building envelope structure, which avoids or greatly buffers the stress and stress accumulation caused by the structural deformation caused by external temperature changes, avoids the structural damage caused by the freezing and chilling of rain and snow, and the hot and humid drying cycle, and greatly reduces the external harmfulness. Erosion of the structure by gases and substances protects the main structure, thereby effectively improving the durability of the main structure. The use of an external thermal insulation system can greatly improve and improve the waterproof and airtight properties of the wall. Also, since the main structural material with high vapor permeability is inside the external thermal insulation system, the inside of the wall is prevented from condensation condensation.
From the aspect of favorable structural stability, external thermal insulation has obvious advantages, and external thermal insulation should be the preferred choice. Compared with the external insulation of the external wall and the internal insulation, the area of ​​the building can be increased; when the existing building is energy-saving, there is less interference with the original household; when the second interior of the building is renovated, the original external insulation layer is damaged. Small; The use of external thermal insulation technology, good thermal stability of the building, the house warm in winter and cool in summer, living comfortably, is conducive to improving people's lives, and therefore more and more widely welcomed by the residents and developers.
Development Status of External Thermal Insulation Technology In the early 1990s, exterior thermal insulation technology has started. Some cities in China have used the technology to pilot build some houses, but there are also many problems. In recent years, on the basis of independent research and development, through the introduction and use of foreign advanced external thermal insulation technology, China's external thermal insulation technology has been rapidly improved. Now a variety of external thermal insulation technologies have been formed to coexist, promote each other, compete with each other, and improve together.
At present, there are three main external insulation systems on the market: Polyphenylene granule mortar external wall thermal insulation system, polystyrene board external wall thermal insulation system (also divided into two categories: expanded polystyrene plate and extruded polystyrene plate Class), non-solvent rigid foam polyurethane field seamless exterior wall thermal insulation system. There are also systems that use rock wool, foamed glass, etc. as insulation materials, but their market share is small. These methods, as long as they are properly constructed and processed, can basically guarantee the quality of the project. In addition, millions of square meters of high-quality external wall thermal insulation projects have been built in many cities and have been well received by the construction industry.
Following the polyphenyl polystyrene mortar external wall thermal insulation system and the polystyrene wall external thermal insulation system, the solvent-free hard foam polyurethane spray-on-site thermal insulation system has received increasing attention for its superior energy-saving effect and comprehensive performance. The application technology adopts a construction method without a cavity, and has strong wind pressure resistance and waterproof effect. At the same time, the entire structural system is superior in weatherability, heat insulation, crack resistance, stability, and shock resistance, etc. Reached the country's three energy-saving goals.
Therefore, the successful development of this application technology can not only enrich the practice of external insulation, but also promote the development of China's building energy conservation cause, so that building energy efficiency can reach a higher level. 193 color waterproof insulation system is a solvent-free hard foam polyurethane field coating external wall thermal insulation technology with independent intellectual property rights. It passed the technical appraisal of the Shanghai Construction Committee in early 2004 and reached the international advanced level.
Although China's external thermal insulation technology for building external walls has made great progress at present, it has become the mainstream technical measure for residential energy conservation. However, there are still many problems. If these deficiencies are slowly improved in the future, this new construction technology will have a promising future.
The exterior wall thermal insulation technology places the thermal insulation system on the outside of the external wall, so that the temperature difference of the main structure is greatly reduced, the temperature deformation is reduced, the structural wall is protected, and the cold can be effectively blocked ( Thermal bridges are beneficial to extend the life of the structure. Due to its outstanding advantages, the residential industry, where building energy conservation is increasingly valued, has been rapidly developed and will have a broader market.
The superiority of the external insulation of the external wall is to put the thermal insulation system on the outside of the external wall so that the building can reach the thermal insulation construction method. As the structural layer is on the inside of the system, the external environment has little effect on it, and its high value heat storage performance is fully utilized. When the room is subjected to unstable heat waves (such as room temperature rise or fall), the structural layer can balance the temperature by absorbing heat or releasing heat, which is conducive to maintaining stable indoor temperature.
The insulation layer is located on the outside of the building envelope structure, which avoids or greatly buffers the stress and stress accumulation caused by the structural deformation caused by external temperature changes, avoids the structural damage caused by the freezing and chilling of rain and snow, and the hot and humid drying cycle, and greatly reduces the external harmfulness. Erosion of the structure by gases and substances protects the main structure, thereby effectively improving the durability of the main structure. The use of an external thermal insulation system can greatly improve and improve the waterproof and airtight properties of the wall. Also, since the main structural material with high vapor permeability is inside the external thermal insulation system, the inside of the wall is prevented from condensation condensation.
From the aspect of favorable structural stability, external thermal insulation has obvious advantages, and external thermal insulation should be the preferred choice. Compared with the external insulation of the external wall and the internal insulation, the area of ​​the building can be increased; when the existing building is energy-saving, there is less interference with the original household; when the second interior of the building is renovated, the original external insulation layer is damaged. Small; The use of external thermal insulation technology, good thermal stability of the building, the house warm in winter and cool in summer, living comfortably, is conducive to improving people's lives, and therefore more and more widely welcomed by the residents and developers.
Development Status of External Thermal Insulation Technology In the early 1990s, exterior thermal insulation technology has started. Some cities in China have used the technology to pilot build some houses, but there are also many problems. In recent years, on the basis of independent research and development, through the introduction and use of foreign advanced external thermal insulation technology, China's external thermal insulation technology has been rapidly improved. Now a variety of external thermal insulation technologies have been formed to coexist, promote each other, compete with each other, and improve together.
At present, there are three main external insulation systems on the market: Polyphenylene granule mortar external wall thermal insulation system, polystyrene board external wall thermal insulation system (also divided into two categories: expanded polystyrene plate and extruded polystyrene plate Class), non-solvent rigid foam polyurethane field seamless exterior wall thermal insulation system. There are also systems that use rock wool, foamed glass, etc. as insulation materials, but their market share is small. These methods, as long as they are properly constructed and processed, can basically guarantee the quality of the project. In addition, millions of square meters of high-quality external wall thermal insulation projects have been built in many cities and have been well received by the construction industry.
Following the polyphenyl polystyrene mortar external wall thermal insulation system and the polystyrene wall external thermal insulation system, the solvent-free hard foam polyurethane spray-on-site thermal insulation system has received increasing attention for its superior energy-saving effect and comprehensive performance. The application technology adopts a construction method without a cavity, and has strong wind pressure resistance and waterproof effect. At the same time, the entire structural system is superior in weatherability, heat insulation, crack resistance, stability, and shock resistance, etc. Reached the country's three energy-saving goals.
Therefore, the successful development of this application technology can not only enrich the practice of external insulation, but also promote the development of China's building energy conservation cause, so that building energy efficiency can reach a higher level. 193 color waterproof insulation system is a solvent-free hard foam polyurethane field coating external wall thermal insulation technology with independent intellectual property rights. It passed the technical appraisal of the Shanghai Construction Committee in early 2004 and reached the international advanced level.
Although China's external thermal insulation technology for building external walls has made great progress at present, it has become the mainstream technical measure for residential energy conservation. However, there are still many problems. If these deficiencies are slowly improved in the future, this new construction technology will have a promising future.