In home decoration, whether it is in the pre-painting or decoration, it is prone to cracks in the cracking of walls and walls. In severe cases, housing construction will threaten personal safety. How to prevent cracking in the wall? Follow the small series together to understand the cracking of the wall and how to deal with it.
First, the wall cracking analysis
Wall surface cracking refers to the formation of linear, polygonal or indefinite cracks or cracks on the wall paint film. Many homeowners’ new homes will find more or less cracking on the walls within a short period of time after the renovation. The cracking of the paint film on the surface of the wall will seriously affect the visual effect of the decoration of the wall surface, and even cause the cracking of the paint film to expand, which will affect the life of the wall surface.
There are many reasons for the cracking on the surface of the wall, but it can basically be summarized as five aspects. They are the cracking of the paint lacquer layer, the cracking of the putty layer, the cracking of the plaster layer on the wall, the cracking of the joints, and the structural cracking of the wall itself.
1. Cracking of the structural layer of the wall itself : Cracking of the structural layer of the wall itself can also cause cracks on the surface of the wall. Including two kinds of situations, one is that the original wall surface itself has cracks, and no appropriate treatment measures have been taken during the later decoration process; second, the original wall surface has no cracking in the decoration fashion, and the uneven foundation settlement and temperature change occur in the later stage. Cracks occur due to other reasons.
Treatment method: The ordinary decoration method cannot be repaired. The professional construction personnel must be found to take corresponding measures according to the actual situation.
2. Cracking of lacquer layer : Cracks on the surface of the wall caused by cracking of the wall paint layer are mainly caused by improper quality of the wall paint product and improper operation of the wall lacquer construction process.
The temperature is too low to reach the filming temperature of the wall paint and cannot form a continuous coating film, resulting in cracking of the wall paint
Treatment method: If it is only the crack of the surface paint film, use the fine sandpaper to grind the crack, choose the same color wall paint, re-brushing can be.
3, PuTTY layer cracking: wall scraping putty can make the wall more smooth and delicate, flatness is much higher than the cement wall surface, so that the wall paint better, but also save paint. If cracks occur in the putty layer, cracking of the surface layer is also likely to occur. Therefore, care should be taken to avoid cracks in the putty layer during construction.
Treatment method: If the crack has penetrated into the putty layer, you can use a sharp tool to expand the crack to a size of a screwdriver, fill in the caulking plaster, and polish and level it. Put it on a grid cloth or kraft paper and level it with a putty. Finally, follow the normal procedure. Brush or wallpaper can be.
4. Cracking of the plastering layer: cracks on the plastering layer of the wall are divided into normal cracking and abnormal cracking. Normal cracking mainly refers to cracks in the plastering layer caused by shrinkage of the cement mortar; abnormal cracking is mainly due to material or construction. Cracks caused by improper processes. Normal cracking is difficult to avoid, but abnormal cracking can be avoided.
Treatment method: If there is a large area of ​​hollowing in the plastering layer, the original plastering layer should be knocked out, and the plastering layer of the cement mortar should be re-doed. After the leveling, the normal procedure should be used to paint. However, after such treatment, the cost will increase relatively. If there is only a small area of ​​cracking, there is no turning, emptying, falling off, you can fill the wall really good cloth, and then brush the paint according to the normal process.
5, cracking joints: wall cracks at the base seam cracks will cause cracks in the wall surface. Cracks in joints mainly occur at the joints of reinforced concrete shear walls and ceramic bricks, at the joints of reinforced concrete beams and ceramic grain bricks, at the entrances of rear blockages, and between gypsum board partition walls and original wall joints. Department. The cracking of joints is mainly due to the influence of the surrounding environment or external forces. Gypsum board, prefabricated partition board and prefabricated floor board will appear contraction and position change, leading to cracks at joints, which are generally vertical seams or horizontal seams.
Treatment method: It is recommended that the entire building be stabilized after the deformation has stabilized, and the repair within a short time is prone to be repeated.
The above types of cracking may lead to cracks in the final wall paint wall. The degree of complexity and degree of damage increase gradually in the above order. Knowing this knowledge, we can take steps to reduce or even avoid cracking on the wall. In the table, the method for judging the cracks in the surface layer of the wall is listed. We can find out the reasons for the cracking of the wall and apply the right medicine.
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