Semi-dry floor screed technology, recommendations, reviews. Semi-dry screed floor with their hands

During the construction of the house employees needs to perform a large amount of work and apply a variety of technologies. The construction of the walls is made of many materials and interior finish is the most unusual of ways. A distinctive feature of works on leveling the floor is that the result of this phase of construction the owners not only see every day, but to feel it under my feet. All this proves the importance of the correct implementation reason.

Types of floor screed

1. The Classic method. Wet screed of cement-sand mortar or concrete. This method of surfacing is used in construction for a very long time. Works on wet screed requires a large amount of time since the material must dry completely.
2. Wet screed. Is performed using the slabs of particleboard, OSB, fiberboard or plywood. The cost of such works depends on the initial quality of the base. What is worse, the more material will be required for alignment. The strength of some of the plates does not allow to put them in a single layer, which also indicates the need to re-work on leveling.
3. Semi-Dry screed. This technique is equivalent to performing classical base, but differs fundamentally minimal amount of water in the sand-cement mixture. It is not filled, and filled on the floor. To increase strength in a solution can be added to the polypropylene fibers, which play the role of a reinforcing frame. Semi-dry floor screed technology which will be discussed below, can be performed in several ways, depending on fluctuations in the plane of the base.

The benefits of semi-dry floor screed

1. No need for additional waterproofing of the floor, as the solution is not flowing.
2. During the execution of works is not necessary to use protective gloves and shoes, as the sand-cement mixture contains only 25% water. This makes it non-marking.
3. If work is carried out not on the ground floor, there is no risk of leakage of solution between the slabs.
4. The Device semi-dry floor screed technology which allows to obtain the absolute smooth base, makes possible also the complete absence of voids and cracks.
5. Total drying Time is only 4-5 days. After this time, you can pack topcoat.
6. Weight base dry much less wet. This reduces the load on the ceiling of the building.
7. Work with solution can be carried out at temperatures down to -50 °C.
8. Special structure of the material allows to obtain a floor with excellent sound and teploizoljatsionnymi characteristics.
9. Semi-Dry screed according to the European standard are made with special mixtures. A large saturation of the market with these kinds of materials and services leads to minimum costs for the work.

Disadvantages of semi-dry floor screed

1. To the start of the seal material area of the room is very dirty.
2. When using special equipment the cost of repairs increases.
3. Price per 1 m² Semi-dry screed depends on the height where work is being carried out. For example, the cost of the floor at the 1st and 20th floors differ by 30%. It explains the need to lift all materials and equipment.
4. Semi-Dry mortar is very difficult to mix manually.
5. Often the builders do not know the exact amount of water in the mixture, so pour it not enough or too much. This leads to disruption technologies and unexpected result.
6. Semi-Dry screed must be thoroughly compacted, otherwise it will crumble and even creak under his feet.

Types of semi-dry screeds

1. Tie backless. The material is laid on the bare concrete base.
2. A substrate made of polyethylene. The solution in this case is not concerned with the rough base and walls. This type of coupler is also called "floating".
3. With insulating substrate. As additional layers are plates of mineral wool. This is especially true on the first floors of houses and in private buildings.
4. With sound insulation backing. She sand-cement mixture does not miss the sound. Additionally it is possible to use polyethylene foam or dampening the noise of the membrane.
5. With reinforced mesh. They gives the floor more strength.
6. With fiberglass. This floor is able to withstand very high loads.

Some of these types can be combined together, so it turns out optimal for the premises the screed. Technology device semi-dry screed is divided into several stages.

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The Training grounds for semi-dry floor screed

1. Before starting work, completely cleared the base. Debris is removed with a broom, and smaller particles with a vacuum cleaner.
2. Set as zero level. It helps to accurately measure the height of the base.
3. If required, large floor defects are puttied. The semi-dry screed, stacking technology which allows you to create a smooth surface, still does not guarantee penetration into all the flaws of the base. The remaining voids may subsequently cause cracking.
4. The Whole floor surface should necessarily be primed. This helps to bond the new layer with the old. The primer dries in a few hours.

Installation of beacons and waterproofing

Beacons are referred to as guide elements that serve as the landmarks for the horizontal floor of the future. They help the Builder to lay the desired thickness.

Waterproofing for semi-dry screeds are not required, but the walls and columns need to be protected from solution. This is done in order that the compression and subsequent expansion of the vertical structures do not affect the condition of the floor. Above the level of a future tie on all surfaces glued damping tape, it will prevent cracking of the material. After drying the floor it should be removed with a sharp knife.

Semi-Dry floor screed, device technology which implies the necessary presence of beacons, allows their implementation in several ways. One of them implies the device orientations on two opposite walls. The beacons consist of a compacted mixture. Their height is definitely measured from the zero level.

Beacons can also be a strap, fixed on screws or concrete. Their level, usually above the ground 8-10 cm

Such beacons are installed stripes every 180-190 cm, if you use the two-meter rule. Decreasing the length of the distance between the reference points becomes shorter. Their height is measured on a string, stretched between the walls of the first lighthouses.

In the process of floor leveling beacons should not move. They need to be mounted securely. As necessary future floor reinforced.

Preparation of solution for semi-dry floor screed

This process can be accomplished in several ways. The easiest of these is dilution with water, the ready dry mix. In this case, you only need to follow the instructions.

If a ready mix, you can make your own. To do this, mix one part of cement and three purified coarse sand. Optionally added plasticizer and fiber. Put everything in the mixer and gradually poured in water. Semi-dry floor screed, application technology which will be discussed below, means that the solution of a certain consistency. Such that when compressed in your fist, it forms a lump, but does not emit water.

The semi-Dry screed with fiberglass can withstand very high loads. The correct amount of solution is obtained by continuously adding dry components and water.

Device semi-dry floor screed. The technology of concreting

After the end of the preparatory work can proceed with the immediate concreting of the surface. Semi-dry floor screed technology which provides for the execution of works of multiple builders at the same time, starts to pour the mixture between the rails. Then the material is leveled by a rule slightly above the beacons. A mixture of the sky itself. As necessary, you can perform the wave-like movement rule, it will help to remove the excess material on the adjacent areas.

While the concrete mixture is beginning to dry, it needs to be compacted and jam. All this must be done within 6 hours after the alignment. Uses a special machine that allows you to make the floor surface flat and smooth. During operation of the equipment the material settles.

Processing of the material ends with a test checking the horizontality and flatness of the resulting floor. The level needs to be clean.

With the aim of gradually drying the floor surface is covered with polyethylene for 12 hours, this will help prevent too rapid evaporation of moisture. After that the floor dry at least four days.

Semi-Dry screed floor with their hands: device and technology

To carry out work of a self-concreting of the floor is possible. The only difference is the use of machines is to align conventional grouting a large area. For the convenience of her gender can be filled in small increments. Technology device semi-dry screed with their hands provides a quick and consistent implementation of all stages of the process. So one person can mix the solution, the second is to put him and dub, and the third wipe.

Components of the cost of work on the floor screed

When ordering ties for a construction company the ultimate cost will consist of:

• Concrete and dry mix;
• Transportation and lifting of all materials and equipment;
• Additional material;
• Operations.

Feedback on the method of semi-dry screed

Many of those who worked on leveling the floor yourself, note that the main thing - to choose the right amount of water. Depends on the progress of cement hydration. When the solution was not enough water, in contact with finished surface moisture of crystals of the material will again begin to rise and the floor will squeak.

Most expertscomments on the method of semi-dry screed positively. However, the maximum service life is still unknown.

Thus, the semi-dry floor screed technology which were discussed in the article, can be made as professional workers, and independently by the landlords.