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Preparation of the floor surface using a dry self-leveling compounds

In this article we look at the modern technology training and leveling the floor using dry leveling compounds, followed by fastening facing flooring, such as ceramic tiles, textile carpets, plastic coatings, linoleum, wooden boards, parquet, cork. By applying this technology, it is possible to align the floor to a very high rate - the angle of the surface is not more than 2%. There is an alternative technology that allows to achieve such results - " Flooring on adjustable lag ", described in the article: " Flooring wooden floors (part 2) ". It is convenient to be used for the renovation of old wooden floors and for leveling the surface in large areas. Dry self-leveling compounds are mainly intended to improve the surface of concrete floors, but there are mixture of reconstruction and the establishment of sound and thermal insulation of floors and floors with internal heating, for example, Veton SELF LEVEL Renova.
Regardless of the manufacturer's floor leveling technology is virtually the same. The first stage of leveling the floor - is preparing the surface.

The basis for laying roll materials must be sound, smooth, completely free of dirt and dust. Substrate C is necessary to remove traces of oil, grease, rust. All cracks and holes shpaklyuyut. All openings in the floor must be carefully sealed to prevent leakage of the screed.
If the base has a large pothole, elevation changes, you must first level the surface with a coarse rovnitelya (for example, " Plitonit-P1 " or " Vetonit 4000 " and " Vetonit 5000 " for potholes over 20mm and " Vetonit 6000 " more than 50mm ). Final cleaning of the base is made from dust with a vacuum cleaner. After cleaning the surface necessarily primed latex polymer dispersions for the floor on the basis of polyvinyl acetate or acrylate-styrene (for example, " Atlas Uni-Grunt ", " Ceresit CT-17 ", primer WATERPROOF company " Tekc ​​", " Vetonit Primer ") . The primer is applied by brush or spray. It must form a thin continuous layer is not allowed formation of puddles. Strongly absorbent surfaces are primed twice. The primer prevents the absorption of water from the freshly applied layer base rovnitelya, rovnitelya increases adhesion to the substrate, prevents the formation of air bubbles on the surface of the alignment layer and thus creates the conditions for a lasting and smooth coating.

To determine the required level of leveling, apply formatting and put beacons or benchmarks. Existing expansion joints on the basis of the same mark on the walls for further duplication of the notch on the bed rovnitelya. To leave technological holes in the floor, fence off their tight partitions. If the width of the room exceeds 5m, it should be divided into areas of expansion joints. Be sure to separate the alignment layer on the walls of thin strips of Styrofoam or wooden slats in plastic film.

Before you start you need to prepare two capacity 30-40 liters, the amount of water and a dry mix.

The preparatory work is finished and you are ready to cook the mixture. Package 25 kg is mixed with the required amount of water (see. For particular instructions in the mixture), wherein the dry mixture is poured into water while stirring. Mixing can be done using a drill equipped with a special nozzle with a speed of 400 rev/min until homogenous. Immediately thereafter, the solution should be used. The prepared solution was poured by hand. Since the gap between pouring the next portion of the prepared solution should be no more than 10 minutes to work better together. One person pours the mixture, and the other prevents the next portion. Weight rovnitelya poured from the tank wall parallel strips width of about 50 cm. For a better distribution of leveling compound on the surface, you can use a wide spatula. The work is recommended to begin with the most distant from the wall outlet.

Mortar mix can be used only indoors. The temperature of the air and the ground during work and during the next three days should be at least + 10C. Relative humidity at work - not less than 60%. During drying, the surface should be protected from direct sunlight, drafts and extreme temperatures. When you work in the system " floor heating " gradual heating starting 7 days after alignment (increasing temperature not more than 3C per day), and the total - after 28 days. Ceramic tiles can be laid after 3 days, carpeting, linoleum, plastic and parquet - 7 days.

When you work you must use gloves to avoid contact with the eyes. These are the general requirements for carrying out work on leveling the floor using dry mixtures.

Consider some features of the technology in the reconstruction of the floor. To this mixture produced a special glass fiber reinforced cement-based. During the reconstruction of poorly absorbent surfaces, such as wood, grip can be enhanced by a brush rubbed sand over the fresh mortar (2 parts sand to 1 part primer). In order to strengthen the weak fundamentals, a special fiberglass mesh, which is fastened to the base dot. When using fiberglass mesh minimum thickness of screed - 10 mm.

All types of floors on the basis of self-leveling compounds are not intended for use without floor and are not color.

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