Why do walls crack? How to deal with cracks in the wall?

Shoveling the wall skin is not only used for the wall process when the old house is renovated, but also the wall skin should be shoveled off the new house to comprehensively check the quality of the base wall to see whether it is solid and smooth. If the wall is not strong or has large cracks and holes, the wall needs to be retreated first. Just like when plastering the wall, the wall is uneven in dryness and wetness, the wall humidity is too large, and the cement component of the ash is too much, and it is also prone to cracking.

Nowadays, many houses are built in rural areas, and many of them are brick-concrete structures, and the water absorption of bricks is much greater than that of cement columns. If the brick water does not absorb enough water, it will easily crack when plastered.

<> is putty powder cracking. The main reason for the cracking of putty powder is that the quality of putty powder is not good. If the foundation is not good, it is easy to produce settlement, so according to different geology, find a reasonable way to deal with the foundation; It is also possible to set up some settlement joints.

When the putty powder is mixed with the material, be sure to add milky white gum to the putty powder. It is used to increase the strength of the putty powder so that it will not crack.

The absence of cracks in the wall does not mean that it will not produce cracks, and if there are cracks in the wall itself, then it will definitely develop longer and wider cracks. So how do you prevent the wall from cracking? In the later decoration stage, we will remove the cracked places as early as possible and re-carry out the net scraping and drying treatment.

When treating the base layer of the wall, the putty process cannot be carried out when the air humidity is higher than 70. If the moisture content is too large and has not been dried, the putty or wall paint is directly brushed, and the drying speed is different for each layer of material, once the temperature rises.

The white latex is evenly brushed on the bottom layer of the cloth tape and extended outward for 2 cm to ensure that the two layers of cloth tape can be firmly bonded, and after the second layer and the bottom layer of the cloth tape are pasted, the surface layer is sealed to achieve the effect of the cloth tape and the wall bonding. Double reinforcement planting. The standard practice is to remove the lime layer near the old wall near the new wall, chisel the old wall, and insert steel bars, expansion screws, or steel nails into the old wall, and build the new wall together.

The reason for the cracking of the wall is the quality of the project, followed by water seepage, which is also a very important reason.

After the wall is slotted, the repair and painting is improper, resulting in cracks in the wall shrinkage, and the ratio of cement is inaccurate when plastering.

Cracks in the walls are mainly caused by dampness in the house. You can redecorate the wall again, do it waterproof, or install some waterproof wooden boards on the surface of the wall, which also plays a role in the purpose of redecoration.

Wall cracks are the cracking phenomenon of the wall part of the building structure, which can be divided into concrete wall cracks, brick masonry wall cracks, new partition wall cracks and cracks caused by walls of different materials according to the different materials of the materials.

Repair: 1. Use a putty knife to scrape out the width of the gap, and scrape it into a figure-eight shape, with a wide outer width and a narrow inside.

2. Use gypsum block dry powder to plug the void, and the filling depth is not less than 30-40mm, which does not need to be filled with the wall, which is lower than the wall.

3. Brush 108 glue in the gap and paste the glass cloth or cowhide note.

4. Scrape 821 putty 2-3 times and smooth it with the original wall, and polish it with sandpaper after drying.

5. Adjust the wall paint, brush the sample first after the paint is adjusted, compare it with the wall color after drying, the color is close, the color difference is not large, and then paint the wall.

If there is a crack in a large area, the crack will be chiseled into a "U" shape on the wall base, and the spacing of the "U" groove is greater than 20cm, and the chiseled base will be chiseled, and then the steel wire mesh will be hung. According to the cracking area, the subsequent repair is decided. The cracking area is small, the loose putty around is shoveled down, the dust is cleaned up, and the gypsum powder is added with an appropriate amount of water to stir evenly to smooth the cracked wall.

Now because there are many cracks in the wall due to flooding and dampness, especially in the self-built houses in the countryside, there are many self-built houses that are not waterproof on the exterior walls, resulting in water immersion on the wall of the north when the wind and rain, it is recommended to do waterproofing on the outer wall when repairing the house, so as not to repair it later.

ForWall crack treatmentIn fact, there are some tips in lifeCracks in the wallBecause the structure of the wall itself is not a big problem, the main thing is that the base is not firm or the latex paint is cracked, pay attention to the selection of materials: in addition to using a little putty (including elastic putty), it is best to choose brand latex paint, because brand latex paint has more series of choices, including good elasticity, strong hiding power, and not easy to produce cracks.

<>Then clean the wall or the crack between the wall and the concrete wall, fill the gap with styrofoam, but do not protrude from the gap, reserve 20mm; If the putty layer cracks, it is also easy to cause cracking in the surface layer. Therefore, it is necessary to pay attention to avoid cracks in the putty layer during construction. If it is a structural crack, then the general reason is that the strength of the masonry is small, so it is necessary to reduce the load of the superstructure, or add a stiff concrete beam in the top masonry to bear the upper load.

Paste a carbon fiber anti-crack cloth on the surface of the gap for reinforcement, and after all this is completed, you can scrape the putty for latex paint repair. Another is to remove the insulation board on the surface of the wall, or the cement wall can be removed, and a layer of gypsum board or "five-centi-board" can be installed on the outer wall of the insulation layer, and finally latex paint is made on it.

This is due to excessive pressure in the wall, or due to excessive gravity, so cracks may occur. In such a situation, you should find professional workers to repair the wall joints in time.

Because when you ventilate the putty, the wall will crack when it is dry. The way to deal with it is to re-scrape the putty and re-hang the net, so that the problem can be solved perfectly.

The main reason is that the latex paint below you may be of poor quality and cracking, and the best way to deal with it is to re-apply a layer, and then you should pay attention to the uniform effect of the entire application is very important.