Is it possible to plaster aerated concrete with aerated concrete glue. Internal plaster walls made of aerated concrete. Creating a vapor barrier lining with your own hands

A house that is made of such material as aerated concrete has many differences from houses that were built using foam concrete or brick. Aerated concrete is light artificial stone, which has a porous structure and high thermal insulation performance, and this suggests that the plaster for aerated concrete is not ordinary.

So what kind of plaster should be used for exterior decoration of houses made of aerated concrete blocks? What kind of solution should it be, and why can't ordinary mixtures be used?

As you may have guessed, in order to perform external wall protection, you cannot use ordinary cement-sand plaster mortar. The reason for this ban is that ordinary plaster has lower vapor barrier parameters than the aerated concrete blocks that make up the building.

There is an unspoken principle that any multi-layer breathable wall construction should be built in such a way that each subsequent layer has a greater vapor permeability compared to the previous one. The closer to the street, the greater the permeability.

As an exception, you can allow all layers to have a given indicator of the same level, but this is not welcome.

For work with aerated concrete blocks, you should use only special facade plaster for aerated concrete, which is called so.

How to plaster aerated concrete

Plastering of aerated concrete walls is done as follows: apply facade plaster for aerated concrete blocks on the walls. This material is a special porous plaster mixture, which has high vapor-permeable properties.

It is desirable to apply the plaster on the mesh so that it does not crack and does not fall off when it dries.

The plaster, which is used for finishing buildings made of aerated concrete, must have the following necessary qualities:

bulk weight - about 0.8 kg / dm³;
fraction within 2 - 4 mm;
it must be a light plaster mortar belonging to group P I plasters;
resistance to compression pressure - class CS I;
low coefficient of water absorption;
incombustibility - class A1.

At plaster mixture, used for finishing the facade of houses made of aerated concrete, should have good plasticity indicators, it should be easy to process and should be applied over the base. Such plaster can be applied in a layer, the thickness of which does not exceed 1.5 cm, at a time.

After hardening, this plaster should have good water-repellent properties.

However, it must nevertheless realize a good water vapor transmission capacity, and in addition, it must easily cope with the detrimental effects of adverse weather conditions.

How to plaster aerated concrete video

It should be said right away that plastering work on aerated concrete is not an easy and cheap matter.

If you have already made a firm decision to perform plastering work in an aerated concrete house, then use only suitable materials. Do not forget, this is the guarantee that the work you have done will be of high quality, and the plaster will delight your eye for many years.

Renovation inside the premises is carried out in several stages. When conducting repair work it is important not to forget about plastering concrete walls from the inside. Plaster for aerated concrete plays an important role, even when it comes to work in modern panel buildings. As a rule, concrete slabs have an uneven surface, and this defect cannot be corrected with putty alone. Block coverage is necessary for a number of reasons. These include the smoothness and cleanliness of the wall surface.

Ways

For plastering the internal surfaces of a building, during the construction of which aerated concrete was used, two methods are used. The first method is that plastering on aerated concrete is carried out in such a way as to achieve vapor permeability in concrete walls due to the unique qualities of the material. Builders do not recommend using mortar and cement and sand for finishing blocks indoors. Aerated concrete blocks instantly absorb liquid, after which they become covered with cracks. It will not be easy to mask the irregularities that have appeared even after priming the vapor-permeable wall.

Some specialists are engaged in plastering gas blocks using a different method - vapor barrier. At the same time, the indoor climate will be the same as in reinforced concrete buildings. The only difference is that such plastering will be more reliable.

Promotes vapor permeability of the walls

The components contained in aerated concrete contribute to vapor permeability building material. However, this factor requires the selection of a certain composition of mixtures for repair and finishing works over the walls of the building. To do this, it is necessary to perform plastering in such a way that the inner wall is vapor-permeable or, on the contrary, vapor-proof. In a house with such a wall, the microclimate will self-regulate. In addition, they will not be in the wall.

vapor barrier

To process the inner wall and increase the vapor barrier at least ten times, experts apply a solution, the thickness of which should reach two and a half centimeters. The plaster contains cement and other ingredients. Sometimes, for this purpose, workers put a film of polyethylene under a layer of plaster. But experienced builders are not advised to carry out such work, since the film can peel off plasters and walls due to condensation.

What materials and tools are used?

Everything depends primarily on the task that customers and specialists have set for themselves. For its implementation, building materials are selected that can properly interact with aerated concrete and have the property of vapor permeability. Professionals recommend treating the inner surfaces of the walls of the blocks with a mixture of gypsum, sand and lime. Builders also use tools that include chalk or marble.

For finishing work, specialists use tools for plastering. The mixture is prepared in containers of the appropriate size. The solution is mixed with a mixer either. Thin-layer plaster on aerated concrete is applied to the blocks with a trowel or trowel. Rubbing surfaces is carried out using a grater. A half-ter is used to remove excess mixture. The surface of the blocks inside the walls is leveled with beacons. The aerated concrete plaster is pulled together by the rule between the guides. Builders determine the quality of the work carried out with a rail.

Aerated concrete is a modern building material that resembles foam concrete in structure, but differs in air bubbles located inside. The hollow structure of aerated concrete absorbs moisture well, which requires exterior finish material. The better to plaster aerated concrete walls is discussed in the proposed article.

For the manufacture of material are used:

quartz sand - the basis of the mixture;
lime;
cement;
water;
aluminum powder is added during the manufacturing process of the material. Acts as the main blowing agent and gives the material a specific structure.

Tip: When purchasing aerated concrete, it must be borne in mind that the pores of the blocks, unlike foam concrete, are open. This determines the features of its application and finish.

Comparative characteristics of foam concrete and aerated concrete are presented in the table:

foam concrete	aerated concrete
In its structure, air bubbles do not connect with each other, which increases the resistance of the material to wetting.	Air bubbles are interconnected, which allows moisture to move freely through them.
Good qualities of frost resistance and thermal conductivity.	Gives off heat and hardens from frost.
The inner layer of the plaster layer should be twice as thick as the outer one.	The walls must be plastered inside the room, and then on the facade of the building.
To improve adhesion, the walls must be cleaned, then carefully sanded to remove the upper hydrophobized layer. Due to poor absorption of moisture, a solution is sprayed to increase adhesion, and then the main layer is applied.	Adhesion indicators are higher

When plastering external surfaces of aerated concrete, its high hygroscopicity must be taken into account.

This requires the use of non-standard plasters, which over time will not lead to:

Cracking of the internal and external surfaces of the building, as in the photo.

The appearance of traces of masonry after fog or rain, which worsens the visual parameters of the walls.
Change of technical characteristics.

An increase in indoor humidity.
The appearance of mold in the corners of the rooms.

To finish the exterior surfaces, special facade plasters are used. A particular danger for aerated concrete slabs is temperature extremes and severe frosts.

During operation, a certain amount of liquid begins to accumulate inside the structures, which will expand when it freezes and can greatly damage the structures of the structure. It is possible to plaster aerated concrete bases only with mixtures that have good water-repellent properties that do not prevent moisture from evaporating from the walls.

For exterior finishing of aerated concrete, the plaster must have:

Good adhesion parameters.
High compressive strength.
Frost resistance.

Tip: Owners of buildings made of aerated concrete blocks should take into account that the exterior wall decoration is carried out only after all internal facing work has been completed. Otherwise, when carrying out "wet" interior finishing work, the walls will absorb a significant amount of moisture, which will subsequently begin to evaporate.

If the outer facade is finished before applying the inner plaster, with its intensive evaporation, the outer plaster layer will peel off from the surface of the aerated concrete. After the interior decoration of the room, it is possible to clad the walls of the house from the outside with special compositions with the highest vapor permeability.

Advice: It is impossible to plaster facades using standard cement-sand mixtures due to their insufficiently high vapor permeability properties.

Plaster for gas concrete

For wall finishing, a vapor-permeable plaster for aerated concrete is used, which passes water vapor well, does not get wet, with good adhesion to the surface of the blocks and high frost resistance.

Type of plaster	Material Features
	Acrylic plasters for aerated concrete are used to strengthen structures with increased load, such as a plinth. Used for interior and exterior decoration of the house. Taken for decorative coating. For a long time they retain their color and unchanged texture. They have good adhesion. Material disadvantages: Not too high vapor permeability. subject to combustion. Tip: When choosing such a material, you must first waterproof the walls.
	The basis of the composition is liquid glass. It is a breathable plaster for aerated concrete. Has low water absorption. Acceptable price. There are many textures on which there can be: scratches, roughness, pits. Used for plastering facades and internal walls from aerated concrete, on the material itself and insulating elements for it. Cons: small selection colors, loss of appearance, due to the deposition of dust and dirt on the surfaces of the walls.
	Silicone plaster for aerated concrete is made on the basis of organosilicon polymers. Possesses high resistance to harmful atmospheric action. Practically does not get wet, the mixture is hydrophobic. It has high vapor permeability. Easy to apply. Such plaster mixtures for aerated concrete do not lose their pleasant appearance for a long time. Disadvantage: High cost, but over time, it will likely pay off. In this case, it is appropriate to remember that the miser pays twice.
	The advantages of the composition: Dries quickly. Doesn't shrink. You can make a smooth surface. No top coat required. Disadvantages of gypsum plaster: Not very good vapor permeability. Gets wet quickly in rain or snow. Spots appear on the surface that need to be painted over.

Lime-cement plaster

All the necessary properties are inherent in light thin-layer plasters, specially created for finishing surfaces made of aerated concrete. An example of such plaster can be - Baumit HandPutz for do-it-yourself wall decoration, produced in bags weighing 25 kilograms.

Its main physical properties are shown in the table:

Name of indicator	Its meaning
Grain size, mm	1
Ultimate strength of the material in bending, tensile, N/mm2	≥0,5
Compressive strength of the composition, N/mm²	≥3,5
Vapor permeability coefficient μ,	15
Thermal conductivity coefficient λ, W/mK	0,8
Dry mix density, kg/m³	1600
Liquid consumption, liter/bag	6-7
Consumption of the mixture (with a thickness of the applied layer of 1 cm), kg / m²	15
Minimum layer of plaster, mm	5
Maximum layer of plaster, mm	20

Tip: Before plastering aerated concrete with this plaster, it is necessary to spray the previously cleaned wall surface with Baumit Vorspritze mortar.

Material selection

To choose which plaster is better to plaster aerated concrete walls, you need to purchase a plaster composition that meets the characteristics:

good vapor permeability;
the optimal volume of liquid for mixing the mixture: for one kilogram of the mixture - no more than 0.2 liters of water;
certain values of the minimum and maximum thickness of the plaster;
good adhesion with a base of at least 0.5 MPa;
resistance to negative temperatures;
high resistance to cracking;
long pot life of the mixture, the larger it is, the easier it is to work with the solution, especially for beginners.

The procedure for plastering walls made of aerated concrete

Before starting work, it is better to get acquainted with the video in this article.

Tip: Building blocks from cellular concrete fairly even with almost imperceptible seams. It is not necessary to use plaster solutions for leveling surfaces. It is enough to apply only a thin layer of the mixture.

The wall plastering instruction suggests the following work procedure:

Surface primer. A composition specially designed for aerated concrete, the surface of which actively absorbs moisture, is applied with a brush or roller.

A reinforcing mesh is mounted, which is attached to the surface with self-tapping screws (see How to fix a plaster mesh to a wall).

The walls are finished with a thin layer of plaster.

Properly selected plaster mixes for aerated concrete blocks allow you to make your home not only beautiful, but also warm, preserving all its positive characteristics for a long time.

Recently, aerated concrete has been used in the construction of private houses. The material has earned wide recognition due to its positive qualities. Such material is produced in rather voluminous blocks of light weight, so construction is carried out at a fast pace.

Peculiarities

The foam material perfectly retains heat, therefore, you can significantly save on insulation.

The abundance of pores allows the blocks to "breathe". The bad thing is that they absorb moisture. If in the warm season the water dries up without consequences, then in frost the moisture absorbed into the building material will inevitably lead to the formation of cracks.

Plastering aerated concrete will prevent the penetration of water into the block, maintain its integrity.

For high-quality performance of work, it is necessary to take into account the features inherent in the material being processed. Not all aerated concrete blocks are the same - their structure may differ. For example, the outer surface is different.

Sawn aerated concrete can be plastered without pre-treatment. The molded block has a smooth hydrophobic layer on the outside. It is problematic to apply plaster on such a surface - to increase adhesion, it is necessary to grind the treated side with a metal brush.

We must not forget that the degree of vapor permeability increases in the direction from the inner surface to the outer, so the facade decoration should be done twice as thin as the inner coating.

Before plastering aerated concrete walls after construction, at least six months must pass. During this time, the walls will dry completely, excess moisture that gets into the blocks during the construction of the building will disappear from them.

The outer surfaces of the walls can be plastered decorative materials, compositions for subsequent painting can also be used. External decoration sometimes serves as additional insulation. In regions with a cold climate, plastering plays a significant role in keeping the heat inside the premises.

For aerated concrete, plaster with optimal parameters should be chosen. Finishing material must protect the walls from destruction on both sides.

Due to the porosity, aerated concrete has received such characteristics as thermal insulation and vapor permeability.

Proper Finishing:

helps to keep useful qualities blocks;
does not allow condensate to accumulate inside the pores;
prevents mold and unwanted damage.

Types and compositions

It is impossible to finish aerated concrete walls with ordinary cement mortar. Standard solutions have too much density, so they do not set well with blocks. Due to poor adhesion, after a short time, cracks appear on the walls, which leads to peeling of the plaster layer and exposing the walls.

Special "breathable" mixtures with a so-called vapor-permeable base:

steam passes freely;
create a positive indoor climate;
protect the walls from the accumulation of moisture inside them.

The following requirements are imposed on plasters for finishing aerated concrete:

resistance to precipitation and ultraviolet, to rapid and frequent changes in outdoor temperature;
sufficient density;
high adhesion;
the presence of vapor permeability;
compressive strength;
good thermal insulation;
decorative appearance.

Good plaster meets all of these requirements. It is easy to apply, looks great and stays on the walls for a long time.

If the facade is not processed, then the aerated concrete will first darken, then it will begin to deform, and its outer part will peel off.

Exterior plasters are different from those used for interior finishing of aerated concrete blocks. The former are more expensive, the latter are cheaper. The main difference lies in the ability of the hardened mixture to resist moisture. If for external walls this indicator is essential, then for interior decoration you can do without it. The exception is plaster for rooms with high humidity. such as bathrooms.

By composition, facade plasters are divided into the following types:

acrylic;
silicone;
silicate;
lime-cement.

None of the species can be considered ideal - each variety has its own strengths and weak sides. For example, the vapor permeability of acrylic-based plaster is low, but it has excellent decorative properties. The finish is thin, but very durable. The layer retains an impeccable structure for a long time.

It is advisable to use acrylic plaster when applying good insulation to internal walls.

The basis of silicate plaster intended for aerated concrete is liquid potash glass. The vapor-permeable covering is resistant to moisture, perfectly resists attrition and pollution. Durability is a quarter of a century. The disadvantages include a limited range of colors.

The composition of silicone mixtures includes organosilicon polymers and resins. The cover is very durable. Unlike other types of silicone plaster, it remains elastic after curing. Cracks do not appear on the finishing layer even after shrinkage of the blocks. Due to the fillers, the plaster is given various colors and shades.

The advantages have a significant impact on the cost - silicone mixtures are the most expensive.

Lime-cement mortars are characterized by vapor permeability and strength. They lack elasticity and water resistance. The problem is solved by introducing special additives into the mixture, and experimenting with fillers, you can get different colors.

Ready mixtures are equipped with everything you need - they can be used without prior preparation and the introduction of improving components.

For internal work, completely different compositions are used. Gypsum is present in the basis of plaster for processing aerated concrete indoors.

Before starting work, the blocks should be primed.

The plaster is applied to a leveled surface, free from build-up, dirt and dust.

The work is carried out in several stages:

padding;
applying the first layer of plaster;
installation of reinforcing mesh;
applying a second layer of plaster.

Wallpaper can be glued onto the treated wall after the material has completely dried.. Optionally, you can perform a decorative finish. The decor appears when fillers in the form of marble chips or perlite are introduced into the gypsum mixture. A wall covered with gypsum mortar can be painted.

Training

It is very important that the aerated concrete walls are prepared for the application of the finishing layer.

Despite the fact that the outer and inner parts of the wall are operated under different conditions, there are general requirements for their pre-treatment:

both inside and outside the walls must be even;
for both sides, the plaster should be chosen with maximum adhesion ability;
applying the solution to the mesh is desirable on both sides;
the master will need a container for mortar, a trowel, a plaster ladle, a grater.

In order for the plaster to fit well on the gas blocks, the latter should be evenly moistened. For this, ordinary tap water and a simple sprayer are suitable.

If there are chips or cracks, then you will have to pick up a trowel and use the solution to eliminate the flaws. Cement mortar will be an excellent restoration material if the recesses are first treated with a primer.

With the help of beacons, the surface of the walls of the room is displayed in one plane, after which you can begin to perform the main work.

First, finishing is done inside the premises and only then outside - otherwise excessive moisture will form inside the house.

Application technology

The appearance of the treated walls and the durability of the decorative layer depend on the correct implementation of the technology.

Below is the sequence of processing the outer surfaces of aerated concrete walls.

First you need to inspect the blocks: eliminate all irregularities, clean the cracks, expand and putty with a regular mortar.

In the same way, they act when detecting chips and potholes in each gas block. Listed preparatory work you can do it yourself - it's not difficult at all.

Those who dare to do the basic work with their own hands without the appropriate skills need:

get tools;
follow the technology of performing plastering works;
not be afraid of heights (part of the time will have to be spent at a decent height in the forests);
have free time;
have physical powers.

In order for the plaster to lay down well and not lag behind, gas blocks are primed after cleaning with a metal brush.

A special primer is required - it must contain acrylate siloxane. This ingredient protects the wall from moisture and increases adhesion. At the same time, the composition does not prevent the gas block from "breathing".

The priming operation in accordance with the technology must be carried out in dry weather and temperature environment about +15 degrees. It is advisable to process the walls from the side where there is no direct sunlight.

The next stage - mesh tension - is started after the final absorption of the primer.

For gas blocks, a mesh made of alkali-resistant material is suitable. Any other material will simply dissolve over time, which will negatively affect the service life of the finishing layer. On the wall, the fiberglass reinforcing mesh is fixed with self-tapping screws so that there is a small space between it and the wall.

Plastic plaster, specially designed for aerated concrete, is applied to the prepared wall in dry, warm weather. Mixtures for foam building material are quite expensive, but they repel moisture and allow air to pass through. The plaster is applied to the blocks with a wide spatula.. The result should be an even thin layer, the thickness of which is approximately 8 mm.

This is not the end of the processing. A water repellent is applied to the plaster. After it is absorbed, it's time for the final finishing. The choice may be decorative plaster or paint. In both cases, the compositions are distinguished by "breathing" abilities, which guarantee the unhindered passage of vapors from inside the room to the outside.

The processing of aerated concrete walls inside the house begins in the same way as outside. In the same way, an inspection is carried out, and significant shortcomings are annulled. Before puttying surfaces, the leveled wall is primed.

Interior decoration is carried out with special plaster, which includes gypsum and perlite sand.

After the work is completed, the walls become homogeneous, smooth, without the slightest visible defects. The consumption of plaster is small, because the layer is superimposed very thin. This eliminates the need for long alignment, which is also important.

Interior walls should be painted with paints specially designed for aerated concrete. They can be applied to both ordinary plaster and decorative. Painted surfaces look great - decorative trim retains its original appearance for a long time.

The approach to plastering the internal surfaces of aerated concrete walls is somewhat different from similar work on brick and concrete walls.

From this article, you will learn what exactly should be considered when plastering aerated concrete, how to properly solve the issue of vapor barrier, and which mixture is best to use. The sequence of do-it-yourself work will also be considered step by step, corresponding to right technology plaster aerated concrete and the ratio of the proportions of the solution.

There are two options here: use materials for a vapor-permeable finish, which will not interfere with the original properties of the gas block, or use a vapor barrier finish, which significantly reduces the vapor permeability coefficient of the material.

The first option is good because the vapor permeability of the walls of the house contributes to the fact that the microclimate in the building will constantly self-regulate, as a result of which life in it will be as comfortable as possible, you will not need to worry about dampness, the formation of fungi or mold on the inner surface of the walls.

By artificially reducing vapor permeability, you will lose all this, but you will get a more durable layer. facade plaster Houses.

The fact is that it is the steam coming out of the inside of the house through its walls that is the main cause of cracking of the outer plaster coating in the cold season.

This happens because of the "dew point" - when steam, the temperature of which is lower than the air temperature, condenses on the surface of the wall under a layer of external plaster, freezes, and provokes peeling of the cladding.

The choice of the type of plaster mixture lies entirely on your shoulders. You must approach it as responsibly as possible, and be fully aware of what exactly you want to receive and what you are sacrificing in return.

Feedback from builders responsible for plastering walls from a gas block indicates that most customers prefer the option of a vapor-permeable finish.

1.2 What is the best plaster to use?

As can be understood from what has been read above, there are two types of plaster mixtures for finishing aerated concrete walls inside the building - vapor barrier and vapor permeable.

Vapor-permeable plaster mixtures include gypsum-based mixtures in proportion. The best option, which has the best value for money, is the Pobedit Aegis TM35 plaster mix, it contains lime.

Aegis TM35 (lime) has all the properties that should be inherent in a high-quality mixture for aerated concrete - minimum weight, high adhesive properties, and the strength of the hardened layer.

This mixture is based on gypsum (lime) and perlite sand, it also contains slaked lime, which guarantees the maintenance of optimal vapor barrier characteristics of the walls of the house.

If no additional wall cladding is planned after the plaster layer (painting the plaster layer is a fairly common design decision today), then it is worth giving preference to the Aegis S50 mixture, which includes lime.

This material, although it has a slightly lower vapor conductivity, due to the presence of a 2.5% concentration of polymer impurities in the composition, guarantees maximum strength and whiteness of the walls, since the mixture is based on lime and gypsum with a fraction size of 60 to 90 microns, which is 30-50 percent less than products in the same price range.

The category of vapor barrier plaster mixtures includes materials, which include a large number of polymer impurities is a plastic plaster that has recently gained wide popularity.

This also includes conventional cement-sand plaster, the composition of which does not contain additives in the form of lime, or dolomite flour. To ensure maximum vapor barrier (reduction of steam transmission by 11-12 times), it is required to apply a composition of sand-cement plaster with a thickness of 2-2.5 centimeters. For large areas, a sand-cement plastering station can be used. Since plastering the walls with a cement-sand mortar of a room is not an easy task.

There are also more radical inexpensive ways reducing the vapor conductivity of walls made of aerated concrete, for example, lining a layer of plaster with a conventional polyethylene film, however, this method is not recommended because the finish may peel off the walls due to the formation of condensate on the surface of the film.

The most cost-effective option for vapor barrier plastering of the internal walls of an aerated concrete house is the composition of an ordinary inexpensive gypsum mixture together with vapor barrier primers such as Pobedit Grunt-Concentrate and the like.

To achieve the desired effect, you will have to prime the walls of the gas block 3-4 times, which will reduce the vapor permeability of plaster with a thickness of 10 millimeters by almost 5 times.

It is also worth considering the surface finish of the room, for example, plaster, painted oil paint, loses about 30% of the composition in steam transfer, wallpapering, especially fleece, also contributes to a similar effect.

2 Required tools and work technology

The composition of the tools by which the plastering of the internal surfaces of the walls from the gas block is carried out is no different from the tools for similar work on other surfaces.

You will need a container in which the plaster mixture will be mixed.- a plastic or metal bucket or tank, the main thing is that the size fits. For high-quality mixing, a drill with a mixing nozzle is required, so it is quite difficult to bring the mixture to the desired consistency with your own hands - clots and lumps will form.

The proportion ratio and composition of the dry mix and water are indicated by the manufacturer on each package, do not neglect these recommendations, as they may vary for different plasters.

A mixture of plaster is thrown onto aerated concrete using a trowel or a special plaster ladle. Leveling and plastering is carried out by means of a profil and spatulas.

If you need to apply a thick, over 1 cm, layer of plaster on the wall, then it is recommended to purchase plaster beacons for plastering, which greatly simplify leveling and plastering with mortar. You can rub the surface with a plaster grater, or ordinary fine sandpaper.

If the walls are covered with a thick layer of plaster, then it is necessary to use a reinforcing mesh that will strengthen the finishing layer and prevent it from cracking and peeling.

Also, the mesh improves the adhesion of the solution and the gas block, as a result, it is much easier to apply the mixture to the wall surface. It is best to use plaster fiberglass meshes with a mesh size of 5 × 5 mm.

Stages of work:

We prepare the surface - we clean the walls from dust, glue residues, and any contaminants. Oil stains are degreased with alcohol or gasoline. If the stain cannot be processed, then it is necessary to hollow it out of the gas block, and repair the formed unevenness with plaster mortar.
The walls are covered with a layer of primer. The number of layers is determined by the technology and the requirements for the vapor permeability of the walls, while applying the next layer, you must wait until the previous layer is completely dry.
If necessary, a reinforcing mesh is mounted on the walls. The mesh should be installed tightly, without sagging - this is best done using dowels with wide caps.
A rough layer of plaster mixture is applied. The solution is evenly sprayed on the wall with a trowel, and leveled with a rule.
After setting the rough layer, it is covered with a primer and carefully leveled.
After the complete hardening of the draft layer, the wall is plastered with a finishing mixture, which is leveled with a spatula.

After two days after applying the finishing putty, you can proceed to decorative finishing work.