Alignment of the lower layer is the key to high-quality repair, since it depends on it how successfully the floor covering will be laid. All problems associated with the floor, for example, creaking or subsidence, are associated with improper installation of the coating. But in fact, in most cases, the reason for this is the insufficient leveling of the floor.
The most reliable and popular method of leveling is a cement-sand screed, it is suitable even in the presence of pronounced irregularities and depressions. The main disadvantage of this method is the long drying time, which is 28 days. But not all floors need such a leveling method, some of them can not be aligned.
To understand whether it is worth leveling the floor, the level will help. It will help to determine how pronounced the unevenness is. If it is several millimeters, then the alignment step is not necessary at all. After the necessary treatment is carried out, you can immediately proceed with the installation of the flooring. Such irregularities will not affect its future operation.
If the bumps are strong enough, but not critical, then alternative alignment methods can be used.
For example, many experts recommend filling the floor with PVA. This method is suitable for completely inexperienced beginners, since it absolutely does not require special knowledge in this area. Filling perfectly hides small roughnesses and floor defects, making it much easier to install flooring. In the presence of pronounced depressions, putty can be applied repeatedly.
Another way to alternate alignment is to use plywood squares. The method is considered the most costly, but simpler and more convenient to execute. As beacons that help determine the desired level, ordinary screws can be used, which are fixed at the corners of the square with a screwdriver at a certain height. Plywood boards help create an absolutely smooth surface that is ideal for further installation of any floor covering. It should be borne in mind that the minimum thickness of plywood should be at least 12 mm. But with minor irregularities on the floor, 10 mm plywood will be enough.
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