What are the advantages of dry filling for the floor. What to look for

Flat surface of the floor is an important condition for every apartment or house, the violation of which leads to a deterioration in the quality of the coating and subsequent correction. "Knauf" dry floor filling is often used to create a high-quality surface due to the smaller number of required jobs compared to the usual screed.

Composition

This material is a popular and widespread method of arrangement. It contains expanded clay, so it retains the same density and thickness during the entire period of use, as the expanded clay is highly resistant to shrinkage. Dry backfill for the floor has many useful characteristics, such as resistance to the influence of mold, microorganisms, moisture; High operational properties; Porous lightweight structure and harmlessness for humans due to the content of fired clay - expanded clay.

The material includes two components: a rough floor on the basis of gypsum fiber cloth and the screed itself. It is possible to perform the warming-up and leveling work in sequence. In particular, after the formation of the roughing base in one half of the room, the existing items are transferred to it, then the other side begins to be equipped.

What to look for

Granules have a rounded shape with a diameter of up to 5 mm, which ensures proper packing. There are several varieties for use under different technical conditions and operational loads. The average flow is 15 liters per 1 sq. Km. M, provided that the thickness of the piling is no more than 15 mm. Its increase entails the need for more backfill. Optimal characteristics of the final coating are achieved by creating a layer of 30 mm. So, dry backfilling for the floor ensures the absence of deformations and damages even if the installed loads are exceeded on the floor. Quality material is always sold in branded bags, having a volume of 40 or 50 liters. Before buying it is advisable to consult with a specialist so as not to make a mistake in choosing the size of the pellets and the properties of the backfill.

Advantages

The positive sides are unchanged regardless of the technological process and the type of composition. It is worth noting the possibility of equipping the floor for one day in one room. Possible laying of such coatings as ceramic tile, laminate, linoleum and others. The use of backfill forms a quality sound and heat insulation, which provides a warmer coating compared to those for which a traditional screed was used. There is no additional work after the installation of the base, and there is no need for grinding and covering with a special vapor barrier film.

The dry backfilling for the floor "Knauf", whose price is 289 rubles per 40 liters, has a small load on the floors. At the same time, there are no shortcomings that are typical for cement-based screeds, and the absence of troughs and unevennesses simplifies the installation of a parquet board and other materials without the use of an additional filler floor.

Dry backfilling for the floor: disadvantages

Despite many advantages, there were some drawbacks, among which the main is the moisture conductivity, which requires the installation of a special layer on the floors, after which the backfill is already layered. The vapor barrier film protects the material against moisture, which is possible when contacting concrete slabs. Bituminous paper and parchment are used on surfaces made of wood, for polymer concrete, a polymer film is optimal.

Application technology

The dry backfilling for the floor, the price of which allows it to be classified as a budget category of materials, is characterized by simple arrangement and is based on the following: preparatory work, piling, leveling and installation of the finishing floor. For the preparation of the base, the debris is cleaned, the existing defects and cracks are eliminated by the cement composition. Dismantling of the old wooden coating is characterized by the presence of a sand layer, which was previously used as a soundproofing. It must be removed before starting backfilling.

The vapor barrier film is mounted after the completion of all preparatory work. When flooring, the webs should go to the wall structures and exceed the level of the future floor covering by 10-15 cm. The perimeter fixing is carried out using a special edge band or adhesive tape with two adhesive sides.

The most important stage is to deploy beacons. It has a great influence on the quality of the whole rough floor. Preliminary prepared rake and the material itself. Dry backfilling for flooring Poured in the form of a narrow strip length parallel to the wall, with an indent from it to a distance that is approximately equal to the length of the rail for alignment. Then the second one falls asleep, and so on to the opposite side.

Completion of work

Compliance with the level is determined by means of a laser device, then the beacons are leveled. The material is poured into the inter-band spaces until a smooth surface is formed. Subsequently, it must be tamped and checked with the level of the lighthouses.

Next is the installation of elements of the rough coating, which serve as plates from gipsovolokna, mounted on the screed. If there is a need for a layer more than 15 cm, dry fill for prefabricated floors is used in two stages, with each layer being leveled and covered with a sheet of GVL. Joints are sealed with a special mastic, and the floor elements are additionally fixed with self-tapping screws.