The key measures to improve the crack resistance of external thermal insulation coatings are mainly as follows:
Base treatment: base treatment is an important part of the construction of external thermal insulation coatings, and the quality of base treatment directly affects the anti-cracking performance of external thermal insulation coatings. The following should be done at the grassroots level:
The surface of the base layer should be smooth, no cracks, no oil stains, no floating dust and other debris.
The surface of the base layer should have a certain roughness to facilitate the adhesion between the coating and the base layer.
The base layer should have a certain strength to withstand the load of the external thermal insulation coating.
Grassroots treatment
Insulation layer construction: The insulation layer construction should be carried out in strict accordance with the specifications, and the thickness and density of the insulation layer should meet the design requirements. The following points should be achieved in the construction of the insulation layer:
Insulation materials should be selected with qualified quality products and installed according to requirements.
The insulation layer should be dense and free of voids, and should have a certain resistance to cracking.
Insulation layer construction
Coating selection: external thermal insulation coatings should be selected with good waterproof and anti-cracking properties. Attention should be paid to the following points in the selection of coatings:
The coating should have high tensile strength and crack resistance.
Coatings should have good weather resistance and maintain good performance in various climatic conditions.
Exterior thermal insulation coatings
Coating application: The coating application should be carried out in accordance with the specifications, and the coating thickness should meet the design requirements. The coating application should do the following:
The coating should be evenly brushed, and there should be no leakage, flow, etc.
Coating application
In addition, the following points should be paid attention to after the construction of the external thermal insulation coating:
Maintenance: The external thermal insulation coating should be maintained after construction, so as to facilitate the curing and anti-cracking performance of the coating.
Maintenance: External thermal insulation coatings should be maintained regularly during use to prolong their service life.
Through the implementation of the above measures, the anti-crack performance of the external thermal insulation coating of the exterior wall can be effectively improved and its service life can be prolonged.