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With the external wall insulation program, the insulation layer is placed on the outside of the building envelope structure, buffering the stress caused by structural deformation due to temperature changes, and avoiding structural damage caused by rain, snow, freezing and thawing, dry and wet cycles, and reducing Hazardous gases and ultraviolet rays in the air erode the enclosing structure. Facts have proved that as long as the wall and roof insulation materials are properly selected and the thickness is reasonable, external insulation can effectively prevent and reduce the temperature and deformation of walls and roofs, effectively eliminating the common diagonal cracks or eight-character cracks on the top wall. Therefore, the external insulation can not only reduce the thermal stress of the envelope structure, but also protect the main structure, thus improving the durability of the main structure, so it is more scientific and reasonable than the internal insulation.
After the external insulation is performed, due to the large internal heat capacity of the solid wall, the interior can store more heat, so that the indoor temperature change caused by solar radiation or intermittent heating is slowed, the room temperature is relatively stable, life is more comfortable, and the solar radiation is also obtained. The “freedom of heat†generated by heat, human body heat dissipation, household appliances, and cooking heat dissipation is well utilized and is conducive to energy conservation. In summer, the outer insulation layer can reduce the combined effects of solar radiant heat and high outdoor air temperature, so that the internal surface temperature of the outer wall and the indoor air temperature can be reduced. It can be seen that external wall insulation is conducive to making buildings cool in winter and cool in summer.
Facts have proved that as long as the wall and roof insulation materials are properly selected and the thickness is reasonable, external insulation can effectively prevent and reduce the temperature deformation of walls and roofs, effectively eliminating the common diagonal cracks or character cracks on the top transverse wall. Therefore, the external insulation can reduce the temperature stress of the envelope structure, and also protect the main structure, thus effectively improving the durability of the main structure, so it is more scientific and reasonable than the internal insulation.
In summary, external insulation practices are the best choices in terms of building energy efficiency or building life.
External wall insulation is suitable for heating and air-conditioning industrial and civil buildings. It can be used both for new construction and for retrofitting old buildings, and has a wide range of application.