First, the advantages of external wall insulation
1, with wide application range.
External wall thermal insulation is suitable for industrial and civil buildings with heating and air conditioning, which can be used for both new projects and renovation of old houses, and has a wide range of applications.
2. Protect the main structure and prolong the service life of the building.
The external wall insulation scheme is adopted to buffer the stress caused by structural deformation caused by temperature change, avoid the damage of rain and snow, freeze-thaw, dry-wet cycle to the structure, and reduce the erosion of the envelope by harmful gases and ultraviolet rays in the air. Facts have proved that as long as the insulation materials of the wall and roof are properly selected and the thickness is reasonable, the temperature deformation of the wall and roof can be effectively prevented and reduced, and the common oblique cracks or splayed cracks on the top transverse wall can be effectively eliminated. Therefore, external wall thermal insulation can not only reduce the temperature stress of the envelope structure, but also protect the main structure, thus effectively improving the durability of the main structure, which is more scientific and reasonable.
3. The influence of "thermal bridge" is basically eliminated.
In terms of avoiding "thermal bridge", external insulation has more advantages than internal insulation, such as "thermal bridge" at the junction of internal and external walls, external wall ring beams, structural columns, frame beams, columns, doors and windows, and the junction of top parapet and roof panel. According to statistics, the additional heat load of "thermal bridge" in the ground floor room accounts for about 23.7% of the total heat load; Sandwich rooms account for 21.7%; Top floor rooms account for 24.3%. It can be seen that the influence of "thermal bridge" is still great. For internal insulation and interlayer insulation, the above-mentioned "thermal bridge" is almost inevitable, while external insulation can not only prevent condensation at the "thermal bridge", but also eliminate the extra heat loss caused by the "thermal bridge".
4. Improve the humidity of the wall.
In general, the internal insulation must be provided with a vapor barrier, while when the external insulation is used, the condensation analysis is carried out by using the steady-state moisture transfer theory because the main structural materials with high vapor permeability are located inside the insulation layer. As long as the insulation materials are properly selected, condensation will not occur inside the wall, so there is no need to set up a steam barrier. At the same time, due to the external thermal insulation measures, the temperature of the whole wall of the structural layer is increased, the moisture content is reduced, and the thermal insulation performance of the wall is further improved.
5, conducive to room temperature stability.
Because the structural layer with large heat storage capacity is inside the external thermal insulation wall, when the indoor air temperature rises or falls under the action of unstable heat, the structural layer of the wall can absorb or release heat, which is beneficial to maintaining the stability of room temperature.
6, is conducive to improve the waterproof and air tightness of the wall.
Aerated concrete, concrete hollow block and other walls have poor waterproof and airtight performance under the condition that the mortar joint of masonry and the tile paste are not dense. The waterproof and sealing performance of the wall can be greatly improved by adopting the external thermal insulation structure of the external wall.
7. It is beneficial to improve the indoor thermal environment quality.
The indoor thermal environment quality is affected by the indoor air temperature and the surface temperature of the envelope. If the external thermal insulation wall is used to improve the thermal insulation performance of the wall in an all-round way, it will help to keep the indoor air and the inner surface of the wall at a high temperature, thus helping to improve the indoor thermal environment.
8. It is convenient for energy-saving renovation of old buildings.
To some extent, the thermal insulation operation of building houses determines whether the effect is satisfactory and whether the later living experience is more humanized. Today I give you an example of an internal wall insulation, that is, the advantages and contrast of external wall insulation. It can be seen that the requirements of external wall insulation on materials and technology are harsh, and it must be able to withstand the changes of external environment without excessive loss, and generally speaking, the requirements on service life and size specifications are not low, which can be considered comprehensively with reference to this standard.
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