How to perform a tie
You will need
- - dry mix ("Knauf", "vetonit", etc.) or cement with sand;
- - a tool for working with a mortar (trowel, rule, etc.);
- - hydro level;
- - guides slats (beacons);
- - electric drill;
- - mixing nozzle;
- - tape measure;
- - tanks for solution preparation.
Select the type of screed and the material for it. You can perform "floating" or monolithicscreed. Floating screeds are arranged in case waterproofing is laid on the base - as protection against moisture penetrating from below. If the base is dry, it is better to layscreedmonolithically connected to the base.
As for the screed material, it can be made from ordinary sand-cement mortar or from a special mixture. In the first case, the screed will be inexpensive, but its quality may be low. To achieve guaranteed good quality it is necessary to lay the reinforcing mesh. It also requires laying damper tape around the perimeter of the room. On top of that, the sand-cement screed solidifies for a long time - about one month.Screeds from dry mixes do not form cracks, do not require the installation of a damping tape and quickly harden.
Clean the base of all stranger - dust, debris, exfoliated parts. If you decide to arrange a monolithicscreedPrime the surface of one of the primers for concrete substrates. It will thicken the surface layer, enhance the adhesion of the screed to the base and prevent moisture absorption from the solution. If the base has cracks, putty them on.
Mark the level of the surface of the screed on the walls. To do this, determine one point of the level of the finished floor - according to its level in the other rooms or along the lower edge of the interior doors. Using the hydro level, find the corresponding points in the four corners of the room and connect them to each other with straight lines using a cord. The resulting line characterizes the surface level of the finished floor. Measure from this line down a distance equal to the thickness of the floor covering, connect the resulting points with straight lines. As a result, a screed surface line will be marked on all walls.
Install guide markers, which are metal profiles that provide a flat horizontal surface for the screed.They must be placed in several parallel rows so that their upper (working) edge is in the same plane with the lines on the walls. Moving further along these edges of the rule, it will be possible to get a flat horizontal surface of the screed. The distance between the rows of beacons should be no more than the length of the rule (1-1.5 m), the distance from the walls - about 200 mm.
It is most convenient to install markers on piles of solution, pressing them down, or pouring them to adjust the position of the beacons in height. After all the guides will be exposed in the same plane, you need to give time to the solution to grab. When installing the markers, it should be borne in mind that the thickness of the screed should not be less than 30 mm. In that case, if its thickness is more than 50 mm, it is desirable to lay the reinforcing mesh. If there is fiberglass in the dry mix, the grid can not be laid.
Pour the dry mixture into the container, add the amount of water required by the instructions and mix well with a drill and a mixing nozzle. If the instruction requires stirring the mixture intermittently, fulfill this requirement.
Pour the prepared mixture between the guides,level it with a trowel or shovel and tamp it down so that the mixture fills all the secluded places under the beacons, and there are no air cavities left inside it. The final leveling of the surface should be carried out by a rule moved along the upper edges of the guide beacons. Putting one row between the beacons, proceed to the next - until the screed is laid on the entire surface of the floor.
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