The form and application characteristics of insulation and insulation in the exterior wall.

At present, China's building energy-saving work is planned from north to south, from residential buildings to public buildings, from new buildings to existing buildings, from urban to rural progress. Especially in recent years, under the impetus of national policies and energy-saving standards, the thermal insulation technology of enclosing structure has developed rapidly, forming a variety of wall and roof energy-saving technology using different materials and different construction systems.
today mainly about the outer wall insulation insulation structure form and application characteristics of the

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I. Insulation construction form of the exterior wall
In the insulation in the outer wall, the insulation material is composited on the inside of the exterior wall of the building, while the plasterboard, building artificial board or other finish material cover as a protective layer. The structure level is as follows:
1. Main structure layer: for the bearing force wall part of the peripheral protective structure, it may be a wall of cast or prefabribriated concrete, concrete frame filled shale brick, ash sand brick, concrete blocks, aerated concrete, light bone concrete hollow block, etc., or brick-mixed structure of the outer brick wall and other load-bearing external walls (such as load-bearing multi-hole brick, or other masonry materials outside the wall);
2. Air layer: Its main function is to cut off the capillary penetration of liquid water, to prevent moisture insulation materials, at the same time, the outer wall structure layer has the ability to absorb water, its inner surface due to low temperature condensate, by the structural material inhalation and constantly transfer to the outdoor, exudation. In addition, the setting of the inter-air layer can also increase a certain degree of thermal resistance, and the cost is lower than the specially set of compartments. The setting of the inter-air layer is necessary for the internal pore connection, absorbent insulation material,
3. insulation material layer (i.e. insulation layer, insulation layer): is the main functional part of the energy-saving wall, can use high-efficiency insulation material (such as rock wool, XPS extruded polystyrene foam plate, etc.), can also use aerated concrete blocks, hollow microbead insulation mortar and other non-insulation materials;
4. Cover protection layer: its role is mainly to prevent damage to the insulation layer, while to a certain extent to prevent indoor water vapor immersion in the insulation layer, optional paper gypsum board and so on.
2, the application characteristics of internal insulation energy-saving wall
the advantages of the use of internal insulation energy-saving wall is convenient construction, indoor continuous work surface is not large, mostly dry work construction, more safe and convenient, is conducive to improve construction efficiency, reduce labor intensity, while the construction of insulation layer can not be affected by outdoor climate (such as rain, winter). However, in the construction should pay attention to avoid moisture insulation materials, at the same time to wait for the outer wall structure layer to reach normal drying and then install the insulation insulation layer, should also ensure that the structure layer inside the hanging part reserved position is accurate and solid
At the same time should also pay attention to the internal insulation generated by the "cold bridge" in the indoor dew and heat loss of large phenomenon, the "cold bridge" is generally the part of the internal and external walls intersecting nodes, outer window beams, outer window beams, window panels and so on;
Internal insulation energy-saving wall by outdoor temperature fluctuations are relatively large, but at the same time indoor heating heating fast, the use of air conditioning cooling is also fast, generally used in intermittent heating air-conditioning buildings

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