Repair of cracks in plaster
In order to check the weak points in the plaster, it must be tapped with a rubber hammer or a stick, at the end of which a rag will be wound. In those places where the plaster has moved away from the base, there will be a dull sound, and over time, the plaster may crack or crumble.
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And if this happened, then it must be removed to the very base of the brickwork or shingles.
If there are only small cracks on the plaster, then they need to be expanded, that is, expanded with a spatula or knife to a depth of about 1 centimeter, and wide ones are expanded to the thickness of the plaster itself. And you need to make sure that the width of the crack is much smaller than inside. The resulting hole must be cleaned with a dry brush, after which the plaster is moistened in order to obtain good adhesion of the surface to be repaired with the mortar. If it is shingle, then it also needs to be moistened..
If the hole is small, then the solution is applied to the level of the surface, and sealed with transverse movements, and then longitudinal. After application, the layer should dry for about 6 hours to completely harden, and then you can start sanding the surface with foam or sandpaper. Also, many fill up the cracks by squeezing the solution through a plastic bag..
