Now external wall insulation fire rating requirements gradually increase, the first insulation effect and a grade fireproof performance to reach the heat insulation cotton (rock wool, glass wool) having a class a fire, small coefficient of thermal conductivity, advantages of no hollowing, cracking, non shedding and so on, more and more people to pay attention to.
At present, there are three main types of wall heat preservation in China:
1, exterior wall heat preservation
2, exterior insulation
3, exterior wall self insulation
1 "inside the exterior wall heat preservation this is one kind of the most economical most simple operation form, but exists:
The beam column parts cold thermal bridge treatment difficult;
The thickness of the insulation layer and the effective use area of the indoor space;
3 Effect of the second decoration, adding hanging facilities bring trouble. If there is a problem, maintenance of household effects more obvious shortcomings. At present, it has been replaced by other heat preservation, and the top building is no exception.
2 external wall heat preservation is a kind of energy conservation form, which is a kind of energy efficiency. For high-rise building shear wall insulation, particularly the best selection scheme. Especially in the energy saving standard from the original energy saving 50% to 65%, the external wall heat transfer coefficient value corresponding to lower value, it shows that the external wall insulation scheme is reasonable.
3 "external wall self insulation which is a kind of structural heat preservation form, many areas are in the exploration and promotion. From the design, the construction form is more convenient. But in the high-rise buildings, anti shear design point of view, promotion of little value and beam column and cold bridge processing difficult, energy-saving light building block filling wall paint problem, anti cracking problem has not been solved well, the existence of wall seepage, the decorative layer off risks. Light filling material is still in the exploration stage for the use of outer wall material.
Exterior wall external insulation technology has obvious advantages, it can avoid the thermal bridge of building, avoid metope condensation of moisture in the winter; can protect the main structure to reduce thermal stress, and increase the life of the structure; Binet insulation construction increased use of the area; in the transformation of existing energy-efficient housing without disrupting the original tenants living; makes the building more beautiful and so on. At the same time, because of China's residential building with brick and concrete structure mainly massive structure, heat capacity, to the external wall thermal insulation, building good thermal stability, so house warm in winter and cool in summer, comfortable living, is conducive to the improvement of people's life. More and more importance to the people of all ages. In energy saving and environment, it is very important to develop science and technology of exterior insulation technology, which is very important for saving energy, optimizing environment and promoting the improvement of living environment.