How to remedy the wall cracking caused by humidity in the south? How to prevent the wall from cracking?

1. Repaint latex paint.

If there are local bubbles on the wall, you can scrape them off, scrape them clean, apply a layer of primer, dry them and then brush latex paint. If a large area falls off, the bubbles should also be scraped off and smoothed, and then the above operation should be repeated.

Repair the wall with plaster

It is also very popular now, that is, to buy ready-made wall stickers, which are generally available in shops selling waterproof materials and pipes, as well as online. If the wall at home is moldy and the skin falls off, you can try to wipe off the old skin directly and make it up with the wall. And now the wall stickers are relatively safe, so you don't have to worry about small areas of formaldehyde.

3. Brush latex paint again

If there are local bubbles on the wall, you can scrape them off, scrape them clean, apply a layer of primer, dry them and then brush latex paint. If a large area falls off, the bubbles should also be scraped off and smoothed, and then the above operation should be repeated.

Extended information:

Before repairing the wall, all indoor areas where cracks may occur should be investigated and judged first.

2. Then take corresponding crack prevention measures according to different situations:

(1) For the cement mortar base wall, the peeling, loosening and sanding of the wall surface shall be removed to the solid layer, and after cleaning, the cracks and depressions shall be filled with cement mortar. During construction, the ratio of cement to sand should be 1:3, which is easy to crack when the ratio is high; The slotted area of hydropower reconstruction is also filled with 1:3 cement mortar. When scraping gypsum in the above areas, stick a grid cloth to prevent local cracking.

(2) Around the construction passage and the transition area between the old and new walls, hang up the iron net first, and then scrape it.

(3) In the area of internal insulation wall, it is suggested to directly remove the internal insulation wall or paste the grid cloth with gypsum; If it is brick, it is recommended to hang iron mesh for treatment.

(4) If the new wall is tiled, it is recommended to hang the iron net first, and then paste the wallpaper.

(5) Joints of plasterboard splicing and joints between plasterboard and other walls shall be wrapped and painted with antirust paint.

(6) If the original wall surface is not water-resistant putty, it is recommended to completely eradicate it before scraping the water-resistant putty.

(7) For the joint between the closet and the wall, the method of sticking wood veneer is generally adopted, and the conventional gap is bandaged.

(8) It is suggested to bury the PVC corner line first, and then scrape the surface. Note: the above measures can reduce the probability of wall cracking in the later period, but they are not completely eliminated.

3. The standardized operation of the subsequent plastering layer, putty layer, primer and topcoat is also the key factor to reduce the possible cracking and peeling of the later wall.