In recent years, the external wall thermal insulation technology has become increasingly mature, forming a more comprehensive systematic operation, and the integrated thermal insulation and decoration board has gradually been recognized by more customers. However, for the construction, it is only better not to have the best idea. In order to improve the performance of the external wall insulation system, it is undoubtedly necessary to improve its external wall insulation performance. Then, what methods can improve it? Insulation performance? Below, let's look at ways to improve the thermal performance of composite exterior walls.
How to improve the thermal insulation performance of composite external walls?
Composite exterior wall, that is composite insulation material on the wall. According to the composite method can be divided into three types:
1. The method of internal insulation, that is, increase the insulation measures on the inside of the external wall. Common practice is to paste insulation board, plaster gypsum polystyrene powder and other practices.
The problem of internal insulation practices is that some parts of external walls such as internal and external wall junctions and ring beams are difficult to handle and form a “thermal bridge”. At the same time, insulation layers are directly used indoors. Once problems arise, maintenance will have a greater impact on the households. . Therefore, we must pay attention to ensure the quality of the project to avoid cracking, falling off and other phenomena.
2, sandwich insulation practices, that is, insulation materials (polystyrene, rock wool, glass wool, insulation and decoration integrated board, etc.) in the middle of the wall to form a sandwich wall. In this way, the wall structure and the insulation layer are completed at the same time, which is beneficial to the protection of the insulation material. However, since the insulation material divides the wall into two layers of internal and external skin, it is necessary to take reliable measures to pull the knot between the internal and external walls, and it is required that the earthquake-resistant area should do a good job.
3, the practice of external insulation, that is, increase the insulation measures on the outside of the wall (outdoor side). Insulation materials can use polystyrene board or rock wool board, take bonding and anchorage to connect with the wall, surface layer to make polymer mortar with glass fiber mesh reinforcement; for cast-in-situ reinforced concrete wall, you can use the template built-in insulation The composite casting method of the board can be completed simultaneously with the structure and the heat preservation; the method of spraying and wiping the insulation layer with polyphenyl particle powder can also be adopted; the composite heat insulation board with the facing layer can also be made in the factory and installed on the site. , anchored on the wall with anchors. Compared with the internal insulation method, the thermal efficiency of external insulation is high, does not occupy the indoor space, and is beneficial to the protection of the main structure. It is applicable not only to new houses, but also to energy-saving reconstruction of existing buildings. However, because the insulation layer is in the outdoor environment, there are more stringent requirements for the material properties and construction quality of the external insulation to ensure the quality of the project.
Although knowing the method, but the external wall insulation construction should still be determined by the design unit in accordance with the relevant building energy conservation design standards and technical regulations, thermal engineering calculations to determine the thickness of the insulation layer, design and construction practices, the use of materials that meet the quality requirements, and according to requirements Construction can only do more with less.