The winter construction guide for exterior wall coatings is mainly aimed at the precautions for the construction of exterior wall coatings under adverse weather conditions such as low temperature and strong wind in winter. In winter, the construction temperature is low, and the coating is easy to freeze, resulting in prolonged drying time, reduced paint film quality, and even quality problems such as alkali return, whitening, chalking, and sand dropping. Therefore, the following points should be paid attention to in the construction of exterior wall coatings in winter:
1.Grassroots treatment
Base treatment is an important part of the construction of exterior wall coatings, and the winter construction should ensure that the base layer is dry, free of floating ash, no dirt, no cracks and other defects. The new cement mortar wall should be maintained for more than 20 days in winter, and the cast-in-place concrete wall should be maintained for more than 28 days in winter before construction.
2.Putty construction
The drying time of putty is long during winter construction, so fast-drying putty should be used as much as possible, and attention should be paid to controlling the thickness of putty to avoid too long drying time caused by too thick putty. The putty should be sanded after drying to ensure a flat surface.
3.Paint application
The following points should be paid attention to when applying coatings:
The coating application temperature should be kept above 5, and the relative humidity of the environment should be less than 85%.
The construction time should be selected in sunny and windless weather to avoid wind, rain, frost and other conditions during the construction process.
Special tools should be used during construction to ensure that the paint is evenly applied.
After construction, it should be cured to ensure that the paint film is completely dry before being put into use.
4.Paint film maintenance
After the paint film is dried, attention should be paid to protection to avoid bumps, scratches, etc. The paint film dries for a long time during winter construction, and attention should be paid to avoid being affected by rain and frost immediately after construction.
In addition, the following points should be paid attention to in the construction of exterior wall coatings in winter:
Construction personnel should wear warm protective equipment to avoid cold.
Anti-skid measures should be taken at the construction site to avoid accidents.
Construction tools should be cleaned and dried in time to avoid freezing.
Through the above precautions, the construction quality of winter exterior wall coatings can be effectively improved and the construction safety can be ensured.