The final decoration effect of real stone paint is the direct reflection of quality. On the problem of wall cracking, the first thing to think about is that the quality of real stone paint for exterior wall is not qualified, but in fact, most of the cracking problems of real stone paint for exterior wall are caused by the nonstandard construction.
Today, Xiaobian will show you the "black pot" with real stone paint!
1. The surface of the building wall is cracked due to defects
Some quality problems exist in the wall itself, such as hollowing of the wall, shrinkage of the material after immersion, resulting in cracks in the external coating.
Solution: if it is the problem of the foundation surface of the exterior wall itself, it is only necessary to evenly remove the empty wall along the direction of cracking. It is recommended to use elastic putty for priming, then overall leveling, and finally the construction process of real stone paint coating.
2. Too thick stone paint putty
Before the construction of real stone paint, the putty layer must be scraped first. If the putty is scraped too thick in a single batch, it will dry unevenly, and then cause continuous cracking, which mostly occurs in the places where the internal and external corners / wall corners are difficult to reach the flatness.
Solution: it is very simple to solve the crack of putty layer, only need to polish the uneven part of putty, and then use putty for simple repair.
3. Cracks of cement mortar plastering layer
When the surface is plastered, the cement mortar shall be plastered before it dries completely, causing cracks after the cement mortar dries completely, resulting in cracks of emulsion paint after the decoration.
Solution: in this case, if the wall cracks need to be remedied, it will be relatively troublesome. If the wall cracks are irregular as a whole, they need to be removed as a whole and then re constructed.
4. Cracking of the applied coating
When applying the primer and finish coat, the construction of the second coat is started before the first coat is completely dry, and the inconsistent shrinkage leads to the stress distortion of the joint surface and the crack of the finish coat.
Solution: if it's just cracks on the surface of the paint film, use fine sandpaper to polish off the cracks and brush them again.
5. How to deal with the large-area cracks on the wall that cannot be partially repaired?
Solution:
The first, first of all, the cracks should be scraped clean, and then the putty should be scraped again to prevent the wall from water seepage and ash.
The second course is to seal with special paper tape, and finally seal the edge again with adhesive yellow tape, and then brush the upper paint after drying, so as to effectively ensure the firmness and stability of the foundation layer and avoid the aggravation of wall cracking.
The cracking of the wall base belongs to structural cracking, and the repair can only maintain the surface effect without severe impact. Once the wall fluctuates or displaces, the cracking is still likely to intensify. Therefore, in order to achieve permanent effect of the repair, structural construction problems should be avoided.
Editor's note:
There are many reasons for the cracking of real stone paint. Apart from the quality problem of the house itself, the wall cracking is more caused by the nonstandard construction. The problem of paint has been decided at the beginning of the user's plan to purchase. Therefore, when selecting the coating, the engineering users should pay more attention to the supervision and assessment of the wall construction technology. Both the "material" and the "work" should be hard, so as to solve or even avoid the cracking of the real stone paint in advance
Note: the article is transferred from the Internet. This platform aims to spread industry information. The copyright belongs to the original author.