First, how to control the cause of wall cracking 1, paint cracking.
If the wall paint layer cracks, cracks will appear on the wall surface, which may be mainly due to poor quality of wall paint or irregular operation during construction.
Solution: If only the surface film of the wall surface cracks, use fine sandpaper to polish the cracks and then apply the same color wall paint.
2. The putty layer is cracked
When scraping putty, pay attention to avoid cracks. If not only the structure cracks, but also the surface cracks, resulting in cracks in the wall.
Solution: You can enlarge the crack with a sharp tool first, then fill the joint with plaster and polish it smoothly.
3, plaster layer cracking
How to control the wall cracking There are two kinds of cracks in the wall plastering layer. One is normal cracking, which is mainly caused by shrinkage of cement mortar. The second kind of abnormal cracking is caused by improper use or operation of materials. The first situation is hard to avoid, but the second situation can be avoided.
Solution: If the crack area of plastering layer is too large, it is necessary to knock off the original plastering layer, repaint the plastering layer, and then operate according to the normal process.
4. Cracking at the joint
Due to the shrinkage or position change of gypsum board, precast partition wall and precast floor slab, cracks at joints will also lead to wall cracking. These phenomena mainly occur at the joints of reinforced concrete shear walls or ceramsite bricks.
Second, how to control the repair skills of wall cracks 1, wall paint cracks: polish the cracks with fine sandpaper, then clean and repair them, and then use the same paint brush as the wall;
2. Cracks in the wall structure: This kind of crack is difficult to repair. Find professional building structural personnel for maintenance;
3. Cracks in plastering layer: If there are small cracks, use a good cloth and then paint; If there are big cracks, the plastering layer must be knocked off first, then leveled, and then painted.
The above is an introduction about how to control wall cracking. Take notes.