Ways to repair a damaged floor tie

Over time, the floors in the apartments bend, crack, wear out. All sorts of factors stop the tenants in time to eliminate a small defect, which can, then, increase to large cracks and chips. Therefore, before doing repairs in the room or laying a new floor covering, you need to inspect the condition of the floor surface, and in case of damage, repair the screed.

The structure of the floor covering.

Standard the floor in the apartments mainly consists of the following layers: - reinforced concrete base (slab); - waterproofing layer (bitumen, roofing material); - noise-insulating layer (expanded clay, granulated slag);- screed (cement, cement-lime); - flooring (linoleum, tile).
Ways to restore floor screed
All significant changes that occur in layers,affect the condition of the screed. Consider, by way of example, possible causes leading to the occurrence of a particular type of defect.

Causes of screed damage.

Each damage is accompanied by a specific cause. The following defects exist: 1. Abrasion of the surface. Occurs in floors cast from low-quality materials. The top layer is always covered with cement dust.
 Methods of restoring the floor screed
2. Cracks and dents. Formed when the main plate sags, the heat-insulating layer is destroyed, the thickness is insufficient (less than 30 mm), when the cement-sand mortar is laid on the incorrectly prepared base, and there are no expansion joints.
Ways to restore floor screed
 Methods of restoring the floor screed
3. Bundle. Appears if the fill of the overall layer was carried out in several stages, while the surface was poorly cleaned.
 Ways to restore floor screed
4.Porous structure. Is present in those floors that have been poured with a solution with impaired density. The ways of restoring the screed depend on the type of defect. The most common damages include cracks, chips, delaminations and hidden voids. If the structure of the floor is broken by more than 30%, it needs to be re-poured, at smaller values ​​it is restored.

Repair of cracks.

Using a chisel and a hammer, deepen and widen the crack. Using a construction vacuum cleaner or a broom wetted with water, remove the resulting debris and dust. Clean surface is abundantly wetted with a solution made of epoxy primer and solvent in a ratio of 1: 10. In this way, good adhesion is provided, between the damaged base and the applied element. After the primer dries in the treated gap, put a mortar on it with a spatula and align it with the floor relief.

Repair the moving parts of the screed.

Several deep cracks can be placed in a row, which will loose, collapse in a solid canvas floor. Such areas are not poured on top of the solution, but are dismantled and restored. The procedure for repairing the damage: - Chisel and hammer, neatly,around the perimeter of the movable element, the edges are cleaved to free dismantle from the coating; - when the piece is removed, large debris is removed in the cleared opening and dust is removed; - for strong adhesion of the new solution to the old one, to the bottom or a reinforcing layer is attached to the middle of the defective place, which may consist of a metal grid, rods, etc.; - re-clean the place of dust; - cover it several times with a primer (the recipe is described above);
- make pouring cement-sand mortar in the ratio of 1 to 3; - level the surface and smooth down with a spatula on the level of the floor; - to harden the top layer, a fresh, leveled solution is covered with a thin layer of cement. Removing delamination. If the thickness of the waste layer is small, it is dismantled, the surface is cleaned, primed and covered flush with the floor with a self-leveling mixture. If the delamination has penetrated deeply, then determine the size of the occurrence of the defect, cut it down and do the same operations as in the repair of moving parts. Eliminating voids. When the main plate sags, the heat-insulating layer or made mistakes when installing the floor, voids appear under the screed.They contribute to the appearance of such a defect as cracks. To eliminate emptiness: - with a hammer or metal rod, with a blunt tip, knock the surface to determine the location of the emptiness; - outline the contours of the identified defect with a pencil; - drill holes 16 mm in diameter at the designated points at a distance 200 mm from each other; - with the help of a building syringe gradually fill the voids with a repair filler of reduced viscosity; - after the injection, repair the repair hole. When drilling holes in the coupler, remember that this should be done carefully to as electric cables are located underneath.
 Ways to restore the floor screed
Surface hardening. Because of daily loads, poor quality materials, the screed becomes thinner and covered with dust, even if it is under the flooring. To prevent dusting of the surface, special reinforcement impregnations are used. They are applied with a roller, on a perfectly clean base.They are selected depending on the loads that act on the floor. Leveling the base. For laying a floor covering such as laminate, the screed must have slight differences in height. But in fact, few masters can boast of the evenness of their sexes. The photo shows an example of a typical, for flats, deflection.
 Ways to restore floor screed
It can be easily eliminated by using a self-leveling mixture. Fill order : - qualitatively clean the surface from dust; - wash the floor with soda solution not less than 2 times; - moisturize; - apply the mixture in small portions and evenly level;
- with the aid of a needle roller, in the composition of a reduction air bubbles are concentrated. The floor can be leveled with OSB sheets from 12 mm thick. For this: - clean the base of debris, old flooring, dust; - level the deflection with sand; - OSB sheets are laid close to and fixed to the floor, leaving a gap of 10 mm between the wall and the slab, around the perimeter; - drops, between sheets, ground or closed fiberboard.

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