Causes of wall cracking decoration experts call fo

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What is the cause of wall cracking? Cracks in concrete walls are mainly caused by concrete itself and during construction. Such cracks can be repaired by automatic low-pressure grouting. Automatic low-pressure grouting technology is a comprehensive technology developed by Beijing Metallurgical Construction Engineering crack treatment center for the field of concrete crack grouting, including materials, machines and tools, and construction. After grouting repair, the interior of the crack is fully filled with AB-1 grouting resin, which has high tensile and bonding strength and will not crack again. There are many reasons and treatment methods for wall cracking. Now let's reveal the answers one by one

causes of wall cracking

1 The insulation layer of the original room has cracks, resulting in cracks on the wall after decoration

2. Improper repair and painting of the wall after slotting led to cracks in the wall shrinkage

3. When plastering, the proportion of cement is not accurate, and it is easy to crack when the proportion is high

4. The proportion of wall putty is improper or the scraping is uneven

5. The ratio of emulsion paint and water is inappropriate, and the above non-standard operations will lead to wall cracking

treatment method of wall cracking

1 Light partition walls

generally use nylon mesh cloth or kraft paper, and the partition board itself is also prone to small cracks. Therefore, in order to minimize cracking in home decoration, it is best to paste a full layer of glass fiber cloth or bean wrapped cloth. If it is a load-bearing wall or a solid wall, the reason for cracking may be that the putty is too thick during construction or the interval is short, and the putty is not dry. This situation occurs more when the old house is transformed into a leveling wall

2. The old wall

should be required to remove the original base putty and paint. In some rooms, the original wall decoration uses 821 putty, which is easy to pulverize, peel and fall off. All of them should be removed, and the base treatment should be carried out again before painting

3. Cracks in insulation board

cut the cracks with putty knife, try to be deeper, fill in gypsum, pay attention to be filled firmly and evenly, and then stick the cracks with bandages and nylon mesh cloth, and then apply putty or other processes after drying

4. Other methods

the first is the proportion of cement and sand. The best proportion is 1:3. Improper proportion will affect the toughness and tension of the wall; Another is to find out the proportion of putty and latex paint. When painting latex paint, problems will occur if there is too much water. The circuit transformation should be carried out together with the carpentry foundation, because time should be reserved for repair after slotting. The drying speed and shrinkage of cement mortar are different from that of putty powder. Shrinkage and subsidence will occur after the first repair. When wall construction is done, secondary repair should be carried out, so as to level the wall and avoid cracking. When cracks appear in the color wall paint, the effect of local repair is often not good, because the color difference will appear when the color wall paint is painted again

treatment methods for various cracks

1. Temperature cracks - the most common house cracks, have little impact on the safety of the house structure. This kind of cracks only affect the appearance of the house interior, and will not affect the safety of the house. Some remedial measures can be taken appropriately: stick non-woven fabric, paste PVC mesh cloth or use mortar to block the cracks at the cracks, and then paint and repair them

2. Settlement cracks - when the settlement develops slowly and tends to weaken after the occurrence of settlement cracks, the cracks should be repaired after the cracks are stable. The foundation of the new house will gradually stabilize within 2-5 years. After repairing the cracks, the wall may still crack due to the settlement of the foundation. You don't have to worry too much about this. If the cracks have little effect on the overall beauty of the house, they can be repaired a little longer after the first repair. The repair is generally filled with cement mortar, polymer mortar or elastic putty and gypsum, and the caulking tape is pasted

3. Structural cracks - ordinary decoration methods cannot be repaired, so we must find professional building structure personnel to take corresponding measures according to the actual situation

4. Surface emulsion paint crack wallpaper crack: if it is only the crack of the surface paint film, polish the crack with fine sandpaper and re paint it. If the wallpaper is cracked at the joint, moisten it with warm water, and then re apply the wallpaper glue

5. Cracks in the putty leveling layer: if the cracks have penetrated into the putty layer, first use a sharp tool to expand the cracks to the size of a screwdriver, fill in the caulking gypsum and polish it for leveling, paste grid cloth or kraft paper, and then use putty for leveling, and finally paint or paste wallpaper according to the normal process

6. Cracks in cement mortar plastering layer: if there is a large area of hollowing in the plastering layer, the original plastering layer should be knocked off, and the plastering layer of cement mortar should be made again. After leveling, paint or wallpaper should be applied according to the normal process. However, after such treatment, the cost will be relatively increased, and the owner can choose the repair method according to his economic ability. If there is only a large area of cracking without sanding, hollowing or falling off, you can stick dacron cloth all over the wall, and then paint or stick wallpaper according to the normal process. The way with relatively low cost is to nail a layer of gypsum board directly on the original wall, which requires the simultaneous use of environmentally friendly latex and steel nails

7. Cracks at joints: it is recommended to repair after the deformation of the whole building tends to be stable, and the repair in a short time is prone to repeat

editor's summary: the above is the reason why the wall cracks. Tips for decorators: introduction to the treatment methods of various cracks. I hope to help friends who need this! For more information, please continue to follow our website. More exciting content will be presented later. You can also go to the mall to buy more products you like




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