Who is responsible for the cracks in the wall after renovation?

It is necessary to judge who is responsible according to specific reasons. If it is the main wall, it is the developer's problem. If the surface treatment is not in place, it is the decoration company.

The causes of cracks are as follows:

1, temperature cracks: Common cracks in houses have little influence on the structural safety of houses. This kind of crack only affects the indoor beauty of the house and will not affect the safety of the house. Some remedial measures can be taken appropriately: sticking non-woven fabric, PVC grid cloth or plugging the gap with mortar, and then painting it with paint.

2. Settlement cracks: After settlement cracks appear, when the settlement develops slowly and tends to weaken, cracks should be corrected after the cracks are stabilized. The foundation of new houses will be gradually stabilized in 2-5 years. After the cracks are repaired, the wall may still crack due to the settlement of the foundation, so don't worry too much. Correction is generally filled with cement mortar, polymer mortar or elastic putty and gypsum, and pasted with caulking tape.

3. Cracks in exterior wall latex paint and wallpaper: If only the exterior wall paint film cracks, polish the cracks with fine sandpaper and brush them from the beginning. If the wallpaper cracks at the joint, moisten it with warm water and stick it with wallpaper glue from the beginning.

4. Cracks appear in the putty leveling layer: If the cracks have deepened the putty layer, you can first expand the cracks to the size of a screwdriver with a sharp object, fill in the caulking gypsum, grind it flat, paste grid cloth or kraft paper, then level it with putty, and then paint or paste wallpaper according to normal procedures.

5. Building defects: including insufficient mortar mixing ratio during mortar alignment or plastering when cement mortar is not completely dried, which will lead to cracks after cement mortar is completely dried.

Methods to make up for decoration defects:

1. If cracks appear in a large area, chisel the wall base at the crack into a U-shape, and the spacing between the U-shaped grooves is more than 20cm. Then, roughen the chiseled base and hang steel wire mesh.

2. After the wall base is cleaned, stick a layer of polyester cloth, kraft paper or newspaper on the wall first, and use the tension of fiber to ensure the integrity of latex paint film. This method is relatively simple, but the effect is average.

3. Remove the insulation board from the wall, or remove the cement wall. Install a layer of gypsum board or "five-inch board" outside the insulation layer, and then make latex paint on it. This method can remove all irregular cracks, which are generally joints between plates and are easier to handle. However, this method is expensive and difficult to build.

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