Common forms of wall insulation in China

At present, the commonly used forms of wall insulation in China mainly include external wall insulation, internal wall insulation and sandwich insulation.

First of all, talk about the external insulation of the external wall. External thermal insulation of external wall is a kind of thermal insulation method which puts the thermal insulation layer outside the main wall material. Because it can reduce the point influence and protect the main wall material from great temperature deformation stress, it is the most widely used thermal insulation practice and also the thermal insulation practice strongly advocated by the state.

Its main advantages are improving the thermal insulation performance of the wall, reducing the conduction loss of indoor heat energy, increasing indoor thermal stability and good thermal insulation effect. External wall internal insulation This is a traditional insulation method, which is simple and low cost. Thermal bridge refers to reinforced concrete or metal beams, columns and ribs in exterior walls, roofs and other enclosure structures.

Protective effect

Because these parts have strong heat transfer ability, high heat flux density and low internal surface temperature, they are called thermal bridges. Problems are easy to occur in treatment, mainly for indoor use, and the technical performance requirements are not as strict as those for external wall application. And the temperature rises (falls) quickly, which is suitable for rooms with intermittent heating.

Sandwich insulation means that the outer protective wall is layered, and the insulation material is placed in the middle of the outer wall, forming a wall-insulation material-wall system, which is conducive to better playing the role of the wall itself in protecting the outside world and achieving the purpose of heat preservation and energy saving. In the early stage of the development of building insulation materials, China vigorously promoted sandwich insulation technology, and the Qiansanmen high-rise residential district in Beijing, which was built in the early 1980s, is a typical representative.