Because the moisture in the wall base is too high, the pressure generated when the moisture diffuses outward makes the paint film bulge, thus generating bubbles, which usually occurs on the wall surface where inferior products are used.
Waterproof treatment is not done well in civil construction, which leads to rain moisture entering the basement on the other side of the wall through cracks or unpainted base surface, or water leakage, which damages the paint film of the wall when it spreads.
The render putty of the wall is mainly gypsum powder, talcum powder and Shuangfei powder, which will swell when it meets water, resulting in bubbles on the wall, especially on the outer wall.
Solutions to air bubbles on indoor walls;
In order to prevent bubbles from appearing on the indoor wall, the basement waterproof layer of the wall must be well made and the cracks in the wall foundation must be repaired according to the construction specifications. After decoration, the wall can't be dried quickly, and it must be dried in the shade to prevent the paint from being completely dry inside. In addition, it is also necessary to ensure that the water content of the wall foundation meets the construction requirements, and if necessary, add a coating layer in some places to prevent rainwater from infiltrating.
When bubbles appear on the wall, all the blistering and peeling parts should be scraped off first. However, if the problem is caused by wall putty, the putty should be scraped off and a suitable putty should be selected to scrape off again.
The bubbles on the wall are very eye-catching, and daily maintenance must be done. Daily maintenance must always check whether there is water leakage in the water pipe entering the wall. If leakage is found, it must be dealt with immediately, so as to prevent putty and wall paint from foaming due to water vapor, which will make you regret it.
Wall construction should avoid painting in rainy season, and the same brand and product series primer can be used for painting.
Local wall blistering can only be partially scraped off, and the scraped edges should be smoothed, then the base coat and the paint should be painted again; If it is a large area of blisters, it must be scraped clean, and then the wall is dry before construction.
Blister on the wall is very common in daily life, so the owner must take daily precautions. If you see a slight bubble on the wall, you must deal with it as soon as possible to avoid expanding the bubble area.