the building envelope thermal

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Currently, the building envelope thermal insulation structure form, the main compound exterior insulation wall insulation energy-saving system and a single energy-saving system. Composite exterior thermal insulation system is set up outside the exterior wall insulation (most insulation materials are polystyrene foam board products, there is also extruded polystyrene board, as well as foamed polyurethane, etc.), the insulation layer on the outside for decoration layer, the simplest is to paint, if you take a reliable structural measures also Tile or other heavy decorative materials (such as splitting the block, or even hang stone or metal walls), thermal insulation in the form of outstanding advantages such good sheet plastic for trailers insulation properties, light quality insulation materials and heavy MATERIALS Composite both insulation and heat insulation, a wide range of applications, suitable for almost all kinds of structural forms and wall.

Can not deny the exterior thermal insulation composite system is a better energy system, but in the current market situation is not standardized, so the class to use more energy-efficient system manually, slightly prone to omissions on quality problems, some systems also by the construction conditions such as temperatures greater impact, wind and other factors, difficult to ensure project quality, so it is necessary to focus on a single wall insulation materials. Currently, the market has an optional single product aerated concrete products, it can be used as both a main wall with thermal insulation properties of building materials, the country has 40 years of experience in production and application, production plants throughout the country Many companies already highly industrialized production, product quality assurance. Taking Beijing as an example, residential building energy requirements by 65 percent, wall average heat transfer coefficient 6 layer ≤0.60W / m · k, 4 layer below is 0.45W / m · k.

Calculated based on thermal, such as dry density of B05 grade, thickness of 300mm of aerated concrete block, the heat transfer coefficient of 0.58W / m · k, fully meet the Beijing-rise residential area 65% energy saving requirements. If this approach compared with the current more general application of polystyrene board thin plaster exterior insulation system in the multi-residential buildings such as the use KP1 porous brick (exterior walls 240mm thick), posted outside regular foam polystyrene board (thickness to 60mm), the heat transfer coefficient of 0.57W / m · k, can meet the energy requirements of 65% in Beijing, together with adhesive layer can i composite deck over paving and a plaster layer, the total wall thickness of about 340mm. First, the use of their major gaps in the process of aerated concrete products less simple construction. Second, because the process is simpler than the composite thermal insulation system more saving time and labor, the construction speed. Third, low cost. Fourth, the most extensive use of industrial waste products. Therefore, the use of a single material in the form of external insulation is the development direction is an important supplement in the form of composite external insulation, should be vigorously promoted. In the actual application process should also further improve the performance of aerated concrete products.