Wall gap causes and repair methods

Cracks on the wall believe that many people have encountered similar problems. There are many reasons for cracks, and the treatment methods are different. In the case of cracks, we must first understand the cause and then prescribe the right medicine to achieve the best results.

The cause of cracks on the wall surface:

First, if the house is a high-rise townhouse tower, during the construction, the construction holes are used to open the construction holes to transport the building materials, and later filled with foam bricks or light bricks. There may be a gap between the foam brick and the wall, which will cause cracks in the wall in the future;

Secondly, it is also possible that when the house is just built, the putty is too thick or the putty is not dry and painted. After a long time, there will be a network crack, and when the wall is severe, the wall peels off;

Third, the exterior walls of some types of houses face the roads, which are greatly affected by the outdoor environment. The cement, sand and steel bars in the walls are inflated and contracted with temperature changes, and cracks appear on the walls of the inner walls;

Fourth, it appears on the wall that is later built. Whether it is a large core board, a light brick or a plasterboard, the wall will crack within half a year to a year, and it needs to be repaired later.

Repair method of wall crack

1. If cracks appear in a large area, the wall surface of the cracking wall is chiseled into a "U" shape, and the spacing of the "U" groove is greater than 20 cm. The chiseled substrate is chiseled and the steel mesh is hung.

2, after the wall substrate is cleaned, first put a layer of good cloth, kraft paper or newspaper on the wall, using the tension of the fiber to ensure the integrity of the latex paint film. This method is relatively simple and easy, but the effect is average.

3. Remove the insulation board on the wall surface, or remove the cement wall surface. Install a layer of gypsum board or “five PCT board” on the outside of the insulation layer, and then make latex paint on it. This method can remove all the irregular cracks, and the cracks are generally the joints between the plates, which is better handled. However, this method is costly and difficult to construct.

The article was edited by http://sh.gojiaju.com/Shanghai Home Network.

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