How to make a semi-dry screed floor with their hands

One of the first steps in different rooms overhaul is a floor screed: wet, dry or semi-dry.Traditional tie was usually cement-sand, but now she has a serious competitor.It is, for example, semi-dry screed, which is made of several layers: an insulating film for protection from the damaging effects of moisture, insulation and plasterboard sheets.Semi-dry screed is leveling the floor using a semi-dry hard cement-sand mortar, the strength of which is created by adding a solution of polypropylene fibers or the use of special metal reinforcing mesh.This kind of ties on terms of the beginning of the next work lies between the wet and dry.

Technology for creating ties

Semi-dry screed has tangible advantages.When it was created using high-quality but inexpensive materials.The surface of such a tie does not need further treatment, with the result is a monolithic solid and smooth base under the floor, is not afraid of cracking and shrinkage.

Laying semi ties in several steps that must take place in the correct sequence.

Substrate Preparation Floor

The meaning of this step is to clean the floor surface, embedding chips and bursting.If the basis of the detachment are, they must be cleaned and zashpatlevat - just so the surface can withstand the stress caused during operation, and in the near future is not a new floor will need repairs.

Setting level

to bottom has been a reliable and high quality, it is necessary to expose the zero level at a comfortable height.For this horizontal progress can be to make the necessary marks on the walls.That will have a lot of marks on one level, that will see the horizontal at all stages of the work.

Mixture for floor screed

Cement screed is performed using a special polymer material - polypropylene fibers.

The screed of such water should be quite a bit, so do not overdo it with the liquid.When using a reinforcing mesh antisettling reduced cracking, and if there are small cracks, mesh retains the monolithic material.

mixed 120 liters of sand, 50 kg of cement and 150 g fiberglass (on premise of 20kV. M need 0.54 kg of fiberglass).The components were mixed for three minutes, then water was added, the solution was stirred again and fed through the hose in place screed.

When you use a grid to take the solution one part Portland cement, 400 and 3 parts of the sifted sand.The mixture can be prepared without the mixer, on-site installation.First poured sand, cement, and then the resulting mixture was slowly added water.

To find out if there is enough liquid in the mixture, you can take the solution in your hand and squeeze.This tread moisture, but the mixture will retain the shape of a solid lump.This is the normal level of water in the final mixture.

device

insulation When screed floor walls and partitions indoors isolated polypropylene tape, with the upper edge of the belt is located above the fill level.So it is possible to prevent the negative impact of compression and expansion in the screed.

Installing beacons

With special leveling rails mounted beacons, which will be used as a guide, on which the alignment of the mixture on a plane.From lighthouses evenness depends directly ties after work.Lighthouses installed in parallel, and the distance between them should allow them to rely on rail-rule.Beacons must be installed so that they are securely fixed in position and did not mix.

concreting the floor

is followed uniformly fill the entire area (including, and one where there are lighthouses) solution.Lighthouses remain after pouring screed.Progress in Surface aligned rules.

Grouting

ties to improve the efficiency of work is preferable to use a special trowel, which not only aligns the floor surface quality, but also helps to further strengthen its surface layer.Grout produce no sooner than 10-15 minutes after leveling, but as long as the solution to "grab".As a result, to get a smooth surface for the subsequent laying of flooring.

Cutting contraction joints

to floor did not appear shrinkage cracks should be cut into special contraction joints, which prevent the appearance of the finished surface of the deep faults.The depth of the joints should be not less than one-third of the depth position of the layer.Make the seams as well via said rack-rule.

Grouting

Modern semi-dry screed after laying needs special care.For optimum setting of a large area of ​​the screed are covered with polyethylene, creating optimal microclimate and thus eliminate cracking from uneven drying.You can also gently watering tie with water, but do not leave on the surface of the liquid layer.

After 12 hours already screed withstands the weight of an adult, and after 96 hours you can already laid flooring.it is important during the setting period to exercise control over the state of ties - on the surface should not appear cracks and other defects, because they can lead to a deterioration of the surface quality, jeopardizing the future of flooring.

Modern semi-dry screed - one of the most efficient and optimal ways to create high-quality base for floor coverings, whether conventional or modern tile flooring or laminate.The technology of this kind of screed is quite simple, and it can perform any person, even without special education and experience.

Video - semi-dry floor screed with fiberglass