What kind of external wall insulation material is good? What kind do you have?

External wall thermal insulation project should be considered as a part of building construction, so when using it, you should choose wall thermal insulation materials with good fire resistance, and at the same time, because inorganic materials have good fire resistance and thermal insulation, you should try to use inorganic materials.

The types of external wall thermal insulation materials are divided into four grades: A (incombustible), B 1 grade (incombustible), B2 (combustible) and B3 (combustible). Class A incombustible materials are mainly rock wool, glass wool, aerated concrete, etc. , with excellent fire resistance. Grade B 1 thermal insulation materials include modified phenolic foam board and new polyurethane board, while grade B2 and B3 are mostly molded polystyrene board and extruded polystyrene board.

Extended data:

What should be paid attention to in the construction of external wall insulation materials;

1, cleaning the wall at the grass-roots level

The wall at the grass-roots level must be cleaned, and the wall should be free of oil stains, dust, dirt, scavengers, weathered materials, dirt and other dirt. The surface flatness and verticality of the basic-level wall surface shall not exceed 5 mm If the basic-level wall surface is too dry and the water absorption performance is too strong, it should be watered first. Cast-in-place concrete wall should be brushed and sprayed in advance.

2, set square, hanging vertical, elastic control line, screed, convergent, re-inspection.

According to the technical requirements of building facade design and external wall thermal insulation, the horizontal and vertical control lines, expansion joints and decorative joints of doors and windows at the pop-up place of the wall surface. Hang vertical datum steel wire at the necessary places such as the big corner (yin and yang angle) of the external wall of the building, and hang horizontal line at the appropriate position of each floor to control the verticality and flatness of the insulation layer.

3. Apply DY inorganic thermal insulation material.

According to the water required for cement slurry-fly ash water, the general water: powder = 1: 1.5, which can be appropriately adjusted according to the water absorption of different walls, different seasons and construction requirements, so as to achieve simple operation. When stirring, first put water into the blender and start the blender. After adding water, slowly pour DY insulation powder into the blender and start the blender for 3-5 minutes to make the slurry become even paste.

References:

Baidu encyclopedia-outer wall heat preservation material