How to properly plaster the mortar

Plastering works are performed not only for leveling the surface, but also for giving it different decorative properties.
Only it is important to know how to properly plaster with cement mortar. Having studied the technology of preparatory and plastering works, it is possible to obtain a surface of high quality for many years to come.

And what do you need to know in order to correctly apply the plaster on the walls?
The work is divided into several stages.
Stage of surface preparation, tools and materials.
Setting of beacons. About the installation of beacons is written on the site in the article "How to level the walls on the beacons with the help of plaster".
Preparation of the composition and plaster application to the surface.

Initial stage
Each surface necessarily passes the preparation phase.

The preparation of the surface for plastering involves cleaning the surface of the old paint, wallpaper, dirt and grease stains.

To facilitate the removal of old wallpaper, apply a special solution to the surface that lifts the material. After a little exposure, raise the old wallpaper with a spatula, setting it under the wallpaper.
Old paint is peeled off with a spatula or metal brush.

Clean and dry the surface must be primed.
Primer is a liquid, which includes substances that increase the adhesion( adhesion) of building materials.
Be sure to comply with the rule, apply finishing materials from one manufacturer.
If you bought a dry plaster mixture of a certain manufacturer, then buy the same primer from the same manufacturer.
An increased demand is made of a primer called Betokontakt, which is a polymer dispersion, with increased resistance to alkali. The composition of the liquid includes quartz sand, several times increasing the adhesion of the primer.

Application of plaster
The plaster coating process is carried out under the following conditions:
- the room temperature should be in the range of + 5. .. 30 ° C, and the relative humidity of the air can not be higher than 60%;
- a special tool is used;
- the plaster solution is applied in stages using special methods.
Of the most popular tools:
- various sizes of spatulas and trowel;
- wide bristle brush;
- duralumin or wooden falcon;
- half-and-half, grater, rule.

How to prepare the mortar for plaster

The selected plaster mixture is prepared according to certain rules and strictly according to the enclosed instructions.
In a clean plastic bucket, you need to pour the required amount of water according to the instructions attached to the dry plaster mixture. Then pour the dry mixture in the right parts.
Use a special mixer to mix the mixture.

You need to cook a quantity of solution that you can recycle during the life of the solution. It is indicated on the package of dry plaster and is less than 1 hour.

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The mixer can be replaced with a drill with a nozzle intended for mixing plaster solutions. Use only nozzles for solutions, and not for mixing paints.
The consistency of the finished solution resembles a cream on a pastry.

How to apply the plaster mortar

Before applying the mortar, the wall must be fixed with reinforcing mesh or filled with shingles. Be sure to cut the seams on the brick, cut on the concrete surface. The depth of the cuts on the brick must be at least 5 mm. The concrete surface is moistened with water.

To apply the putty to the wall, use two spatulas: up to 50 cm long and a spatula up to 10 cm wide.
Using a small spatula, the mortar is applied to a large one and already applied to the wall.
The mortar can be applied by trowel, trowel.

The solution should be sprinkled between the beacons at the bottom and go up. The solution is leveled by a rule that is constantly moving in the horizontal plane and moving upwards.
Remains of putty remove from the rule with a small spatula, applying in the right place on the wall.
Always clean the container of debris after it is drained. The new solution is mixed only in a clean container without any trace of the previous solution.

Remaining defects on the wall are eliminated after the mortar dries. The formed sags or furrows are best removed with a spatula.

The ceiling is first plastered, and then the walls.

The classic method of applying the plaster

The plaster solution is applied in several layers.
The first layer is applied with a spray. The second layer is a primer. The third layer is the covering.

The application of the first coat depends on the strength of the plaster on the wall.
The spray is applied with a liquid solution filling the cells of the reinforcing mesh, shingles, incisions on the concrete, seams in the brickwork.
The thickness of the layer on concrete and brick does not exceed 5 mm, on a grid or shingle up to 10 mm.
The trowel is used for the spraying.
Surface is rough, does not require alignment.

The primer should be primed after hardening, but still wet. It is determined by an open palm applied to a rough surface. The surface is fairly firm, but also moist at the same time.
The primer solution is slightly thicker than the spray solution, it is well spread with a spatula.
In the middle of the falcon, a solution is applied and, using a wide spatula, the composition is poured onto the wall. Each portion of the solution should be smoothed with a spatula. The solution is thrown with overlapping and immediately smoothed.
A falcon is a square wooden plank, in the middle of which a plaster solution is applied.
The primer layer is covered with a finishing layer of plaster and is designed to eliminate the smallest defects. The thickness of the finishing layer does not exceed 2 mm. The finishing layer is applied to the wet primer layer with a wide spatula along the arc, pressing the lower edge to the primed layer.

To obtain an ideal surface, it is recommended to make a grout that eliminates small irregularities. Video, how to properly plaster with cement mortar.

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