What should be paid attention to in the construction of exterior wall paint in winter?

As we all know, winter is the most difficult and problem-prone season for paint application

For exterior wall coating construction, generally speaking, the ambient temperature must be controlled above 5 degrees, and the ambient humidity must be controlled below 80%, otherwise it is not suitable for construction

1.

The base treatment is the basis of exterior wall painting.

The content of grassroots treatment includes: removing dust, oil, asphalt and other dirt on the surface of the grassroots; reducing or eliminating surface defects; improving the physical or chemical properties of the surface of the grassroots

2.

First of all, putty layer construction can be carried out above the qualified foundation of the base layer

Secondly, in order to reduce the drying time of the putty layer, the putty should not be batched thickly, and each pass of the putty should be scraped after the putty is dried in the previous pass, generally 2-3 times

3.

The exterior wall paint construction is generally divided into three steps, taking real stone paint as an example

The second is the construction of the main coating real stone paint.

Finally, when the real stone paint is completely dry, apply a layer of water-based finishing paint to improve the anti-fouling, self-cleaning ability and water resistance of the overall wall surface, and enhance the overall effect
.

4.
Storage of paint

In the winter paint construction, the paint stored on site should be placed in the indoor classification and yard, and the indoor temperature should be above zero.
When the temperature is below zero, heating must be used to increase the indoor temperature
.
Paint that has not been used up during construction should be placed indoors, and products that have been frozen cannot be used again
.

5.
Paint film maintenance and finished product protection

It takes 7 days for the coating film to dry and achieve the best performance on the surface of the object at a standard temperature of 25°C.
When the temperature of the coating construction environment in winter is generally low, the time for the coating film to dry and achieve the best performance should be relatively extended.
During this period, it is necessary to minimize the pollution and bumps on the surface of the paint film, so as to prevent the repair caused by pollution and bumps from affecting the overall effect
.

In short, during the drying and film-forming process of the exterior wall coating in winter, it is necessary to ensure that the ambient temperature is higher than 5 degrees and the ambient humidity is lower than 80%
.
In winter, construction should be carried out according to the construction conditions of the site, and corresponding protective measures must be taken to avoid freezing of the coating film as much as possible
.
To ensure the smooth progress of the project coating quality and construction schedule
.