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    Home > Coatings News > Paints and Coatings Market > Precautions for exterior wall construction when the weather is cooling down

    Precautions for exterior wall construction when the weather is cooling down

    • Last Update: 2021-12-02
    • Source: Internet
    • Author: User
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    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 putty should be scraped after the previous putty is dried, 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.


    In the winter paint construction, the paint stored on site should be placed indoors and placed separately, and ensure that the indoor temperature is above zero.



    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 prolonged.
    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, for exterior wall coatings in winter construction, during the drying and film-forming process of the entire system, 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 done 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 coating quality and construction progress of the project
    .


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