Indoor repairs are carried out in several stages. When conducting renovation works 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 panel buildings modern layout... 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.
For plastering the internal surfaces of the building, during the construction of which aerated concrete was used, two methods are used. The first method consists in the fact that aerated concrete plaster is carried out in such a way as to achieve vapor permeability in concrete walls due to unique qualities material. Builders advise against 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 disguise 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. In this case, the microclimate in the room will be the same as in reinforced concrete buildings. The only difference is that such plastering will be more reliable.
The components contained in aerated concrete contribute to vapor permeability building material... However, this factor requires the choice of a certain composition of mixtures for carrying out 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. Also, there won't be any in the wall.
In order to treat the inner wall and increase the vapor barrier at least ten times, specialists 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 polyethylene film under the plaster layer. But experienced builders do not advise to carry out such work, since the film can peel off from the plasters and walls due to the appearance of condensation.
It all depends, first of all, on the task set by the customers and specialists. For its implementation, building materials are selected that can correctly interact with aerated concrete and have the property of vapor permeability. Professionals recommend processing the inner surfaces of the walls from blocks with a mixture of gypsum, sand and lime. Also, builders use tools that include chalk or marble.
For finishing work, specialists use plastering tools. The mixture is prepared in an appropriately sized container. The solution is mixed using a mixer or. Thin-layer aerated concrete plaster is applied to the blocks with a trowel or trowel. Rubbing surfaces is carried out using a float. The poluter is used to remove excess mixture. The surface of the blocks inside the walls is leveled with beacons. Aerated concrete plaster is pulled together by the rule between the guides. Builders determine the quality of the work performed by the rail.
Blocks made of aerated concrete, foam concrete and gas silicate differ in their structure, therefore, the approach to plastering walls erected from these building materials may be different.
A feature of aerated concrete blocks is that there are separate microscopic pores in their structure. closed type... They are evenly distributed throughout the entire volume and provide the necessary degree of vapor permeability and thermal protection of the walls.
Foam concrete, like aerated concrete, has closed pores in its composition, providing the required amount of waterproofing, as well as ensuring the thermal insulation properties of the material. Considering the technology of its production from sand, cement, water and foaming agent, we end up with a material with smooth walls and a porous internal structure.
Gas silicate blocks are made from lime, sand, water and additives that ensure the formation of pores in the bulk of the material. The peculiarity of this material is that the pores are often formed non-isolated, which is the reason for the increased hygroscopicity of gas silicate products.
Almost all properties of building materials have back side... So, blocks of foam concrete have a closed porous structure, which allows them to better resist the effects of moisture. On the other hand, the surface of such blocks is quite smooth, which complicates the process of plastering the walls. In turn, gas silicate blocks quickly absorb moisture, and in order to prevent this process, you need to either prime the walls or moisten them abundantly with water before applying the plaster. Of all three types of blocks, aerated concrete is the most unpretentious for finishing.
Plaster wall decoration looks like this:
As tools, we need the following: a spatula (it is convenient to clean the walls from dust and apply a primer), a large and small spatula, a steel trowel, a perforator with a stirrer attachment.
Not a bad thin-layer plastering workshop. After watching the video, you will learn how to finish smooth walls from foam blocks.
High prices for finishers are a powerful incentive to pick up a trowel and a spatula yourself. So, the cost of plastering 1 sq. m. walls can vary from 300 to 600 rubles. And this is without regard necessary materials! You can find the approximate prices for primer and ready-made plaster mixes in the following two tables.
| Name | Type of | Packing, l | approximate cost |
|---|---|---|---|
| Ceresit CT 19 | Water-dispersive, for processing walls made of foam concrete | 15 | 730 RUB |
| Litokol PRIMER C-m | Deep penetration for internal works | 10 | 720 RUB |
| Thomsit R 777 | Strengthening for absorbent substrates inside the building | 10 | 860 RUB |
| Putzgrund RD313 | Acrylic diluent for indoor and outdoor use | 10 | 800 RUB |
| Terragrunt | 20 | 1620 RUB | |
| Varnish Universal Primer deep penetration | With additives against mildew | 10 | 440 RUB |
| Tikkurila Gravel Strong | Water-borne, deep penetrating acrylic primer with sanitizing and strengthening effect, for façade | 10 | 1400 RUB |
This is important for any plastering work:
- the cellular building material used is initially characterized by some moisture, which exceeds the operational values. Therefore, the plastering of the walls is started only 6 or more months after the construction of the house;
- First comes the interior decoration, and then the exterior. In the opposite sequence, there is a possibility of moisture "locking" inside the blocks with subsequent condensation of steam at the junction "block-outer layer of plaster". Usually there are no questions with this requirement, since for most people, it is important to quickly create comfortable conditions inside the building, and only then deal with it appearance;
- in the presence of wide joints, it makes sense to pre-seal them. This will avoid a number of inconveniences when plastering walls;
- since blocks of aerated concrete are vapor-permeable, plaster must also have this quality. For this reason, you should not use cement plaster for facades. Lime and lime-cement mixtures are suitable for these purposes. The exception is internal work, when the condition of increasing the vapor permeability of the wall layers from the inside to the outside is satisfied;
- when using a reinforcing mesh, the material is laid with an overlap of at least 100 mm, which ensures the required layer closure. The mesh must exactly be sunk into the solution layer, otherwise there is no guarantee that it will work as it should. For example, it is more likely that the finish layer will soon fall off the wall.
| Name | Type of | Packing, kg | approximate cost |
|---|---|---|---|
| Baumit GrundPutz Leicht | Light lime-cement | 25 | RUB 300 |
| WILL WIN - EGIDA TM-35 I | 30 | 245 RUB | |
| Win-Aegis TM-35 ELITE | 280 RUB | ||
| TM-22 wins | Facade cement | 50 | 260 RUB |
| Win - Aegis XI-S-42 | 25 | RUB 220 | |
| REAL RT29 | Cement-lime for external and internal works | 25 | RUB 200 |
| Quick-mix LP 18 | Cement-lime with polystyrene (for outdoor and indoor use) | 30 | 450 RUB |
| Ceresit CT 24 | Cement, for facade and interior works | 25 | 335 RUB |
| Hercules | Cement-sand for work inside and outside | 25 | RUB 150 |
| Glims velur | 15 | 210 RUB | |
| Bonolit | Gypsum for indoor use | 30 | RUB 315 |
The video below is an example of plastering gas silicate walls with a cement-sand mortar inside a house. In this case, the plaster is less vapor permeable than the wall material. But if the condition for increasing vapor permeability in the wall cake from the inside-out is met, then such a solution has a right to life.
We suggest you try an economical option for plastering walls from aerated concrete or gas silicate blocks - using a lime-cement mortar. To prepare it, you will need slaked lime (150-220 rubles per bag of 25 kg), sand (sifted through a sieve with a cell of no more than 5 × 5 mm), water, cement grade 500. In stages, the process looks like this:
In conclusion, I would like to give an example of how not to do it. Better to learn from other people's mistakes.
Lightweight, practical, reliable, inexpensive aerated concrete has created competition for traditional building materials. But at the same time it is necessary to look for new finishing technologies, and special attention here requires aerated concrete wall plastering inside and outside the premises. Many factors have to be taken into account: the unpresentable type of aerated concrete, and the non-moisture resistance of foam blocks, and shrinkage, and poor adhesion, therefore, special requirements are put forward for plaster.
Next, we will analyze in detail how the technology of plastering walls made of aerated concrete and other cellular surfaces differs from finishing materials of high density, we will give step by step instructions, we will tell you what types of mixtures for blocks exist,. We also picked up several videos on how to plaster walls from aerated concrete with our own hands, video tips will help you avoid major mistakes when performing work.
Plaster is the most rational way of protection, made of foam concrete and aerated blocks, only it will help to properly optimize performance properties porous material:
See how the internal aerated concrete plaster is made, a video on the preparation of the base.
At the moment, there are two types of aerated concrete blocks, they differ in manufacturing technology:
To improve the physical and mechanical characteristics of the blocks, expanded polystyrene is added to the working solution, at the output it has an improved expanded polystyrene block
Good to know: In foam concrete blocks, air bubbles are closed, isolated (each individually), in aerated concrete products they are open, which worsens the resistance to heat transfer, reduces moisture resistance and frost resistance.Plaster for external and interior decoration gas and foam concrete blocks should not interfere with the natural characteristics of the porous material. And above all, vapor permeability should be taken into account. If this property is missed, condensation will accumulate between the wall and the plaster, and as a result, fungus and mold will develop. Therefore, plaster for gas and foam blocks must conduct air flows and water vapor well. And of course the plaster must have high adhesion, otherwise it will simply peel off even from a high-quality prepared gas or foam concrete surface.
Important: Interior decoration in houses made of gas and foam concrete should be carried out first of all, and only the next season can you start facade work. It is advisable to start all work only six months after the completion of construction, this period is enough for the structure to shrink and the blocks to dry out.Plastering walls made of gas silicate blocks and aerated concrete must fulfill two mutually exclusive requirements: to be sufficiently vapor-tight to keep the indoor microclimate comfortable for life, and at the same time, to conduct air and moisture pores well to protect the walls from microorganisms and fungal attack. In addition, if condensate accumulates between the layer of plaster and the wall of foam, aerated concrete, then after several cycles of freezing and thawing Basic structure will begin to crumble.
Types of aerated concrete used in modern construction
According to experts, for plastering walls made of foam and aerated concrete blocks, it is better to use ready-made dry mixes sold in bags of 25-30 kg. They include additives and plasticizers that improve the physicochemical characteristics of the solution, adhesion and vapor permeability properties.
Table of plaster mixes for aerated concrete walls
Watch a lesson on how to do it yourself from foam blocks, the video will help you understand everything technological nuances process.
Special plaster for gas silicate blocks and aerated concrete, developed by manufacturers taking into account all material characteristics:
The difference in the characteristics of gas and foam concrete blocks also suggests differences in. One general rule is that preference should be given to ready-made thin-layer, lightweight plaster mixes.
In order for the internal plaster of walls made of aerated concrete and ponoblocks to hold well and not flake off, the surfaces must be well cleaned from greasy and bituminous spots. Casting blocks should be treated with a coarse abrasive, while sawing blocks are rougher, so here you can do with sanding only on slopes and corners.
The next step is priming:
The soil must contain additives that prevent the formation and development of fungi and mold.
The mesh can be fixed on a quick-drying solution or on a mushroom dub
After processing the walls, we strengthen the reinforcing frame, it is rational to use, resistant to an alkaline environment, the size of the cell depends. , we reinforce the corners with a special profile.
For your information: If the plaster layer is up to 15 mm, then it can be applied in one step, if it is thicker, then the process should be divided into 2 or more stages, 1 layer of mortar with a thickness of no more than 10 mm should be applied at the same time, followed by 20 mm each.
Spraying will increase the adhesion properties of the walls
The optimal external plaster layer for foam concrete is 15-20 mm. We moisten the walls well with water from a pultilizer. We dilute the mixture as indicated in the instructions on the package. For the first layer, you will need a solution of the consistency of liquid sour cream. We spray it, a layer of 5-10 mm, let it stand for a while, this will provide better adhesion.
The second layer is applied with a thick solution, it should not drain from the trowel. We put on the required thickness and draw out the solution with the rule. After 20-30 minutes, rub over small irregularities with a spatula.
For better adhesion, the inside of the foam block wall should be treated with an additional layer of soil. Remember that the inner plaster layer should be 2 times thicker than the outer one, this is the only way to bypass the dew point at the plaster / block interface.
Apply from bottom to top base layer solution, we correct the rule for beacons. apply thinner when the main one has dried. It should not be thicker than 10 mm, the surface is leveled with floats, in a circular motion, with effort.
A vapor-permeable plaster for aerated concrete, special, which also contains fine-grained perlite sand and lime dough, is suitable here. Mixes are universal, suitable for outdoor and indoor use.
Remember, it is not recommended to make the outer plaster layer more than 20 mm. To decorate the walls with your own hands, we throw a layer of mortar, level it with the rule of the lighthouses. When the solution sets, apply a thin layer up to 5 mm, and carefully smooth the surface for painting.
Aerated concrete plaster for outdoor use must be protected from getting wet, in regions with a humid microclimate this is especially true. To extend the service life of the decoration and the house as a whole, aerated concrete is treated with a protective layer of water repellent.
Internal aerated concrete plaster is performed with non-moisture resistant mixtures. In saunas, bathrooms, swimming pools - the surfaces are treated with waterproofing materials, and only then the walls are plastered with moisture-resistant cement-based compounds.
Rough finish - apply the mixture on, leave it for an hour, gently smooth it down. Then you can start finishing, you can safely apply on a well-prepared base layer decorative plaster, glue the tiles, putty under the wallpaper.
With large volumes of work, buying a ready-made mixture can be expensive, much cheaper. We offer a recipe for plaster for aerated concrete walls:
Mix dry components thoroughly, add water and lime, bring the solution to a pasty state. Liquid soap can be added to the solution as a plasticizer.
We offer you to watch the final stage of plastering concrete walls with your own hands, the video demonstrates the pre-finishing finish.
Plastering walls from aerated concrete inside a residential building is one of the best options preserve the heat-saving properties of the enclosing structures.
The use of aerated concrete blocks as a building material is practically perfect option for low-rise housing. Private houses built from them have such advantages as low weight (and, therefore, do not require the construction of too strong foundations), low thermal conductivity and affordable price... At the same time, an increase in the moisture content of blocks leads to a deterioration in its heat-saving characteristics and to a heavier structure. To protect the walls, aerated concrete wall plaster is required - sometimes external, but most often internal.
When performing internal plastering of aerated concrete, it is worth considering the features of this material and the differences from more traditional brick, concrete and stone. First of all, this applies to the cellular structure of the blocks, which were originally considered a heater, and only then they began to be used for the construction of the walls themselves. Due to the open structure, which is the result of the addition of a special blowing agent (aluminum powder) to its composition, aerated concrete has high level vapor permeability. This characteristic is one of the main ones when choosing a material and finishing method.
Regardless of the choice of how to plaster aerated concrete, finishing work should begin from the inside, and only then deal with the facade of the building. Changing the order and performing first external, and only then internal finishing, leads to too high humidity in the room. Escaping (especially in severe frost) steam condenses in the walls at the border of aerated concrete and finishing. The moisture created in this case can lead to cracks in the plaster and the falling off of its pieces. That is why the interior finishing work is performed in the first place.
When performing finishing work, plastering of aerated concrete walls is performed in one of two main ways. The meaning of the first is not only to preserve, but even to increase the vapor permeability of the blocks. The second, on the contrary, assumes complete vapor barrier. The advantages of maintaining vapor permeability are to create an optimal microclimate, and the option with wall insulation - in safety exterior decoration which is not affected by steam leaving the building.
It is not recommended to use cement mortar for plastering aerated concrete inside. The first reason is that smooth blocks do not allow the material to stick. The cement layer quickly falls off, and the finishing has to be done again. Secondly, the best option for plastering blocks, a material with the same or greater vapor permeability index is considered as compared to aerated concrete. For cement, this characteristic is much lower, which does not allow maintaining normal conditions inside the building. For the same reason, the answer to the question whether it is possible to plaster expanded polystyrene or polystyrene foam will be negative.
In addition, the cement-sand mortar has a high humidity due to the significant amount of water required for its preparation. Aerated concrete structures with a high water absorption rate absorb liquid from the finishing material. The quality of the mortar, which requires uniform drying for curing, decreases, as does its ability to adhere to walls. As a result, cracks appear on the plaster, and its quality decreases, bringing the next repair closer.
You should not choose a special adhesive mixture for finishing aerated concrete inside. Despite the fact that it is designed taking into account the peculiarities of the material, it is advisable to apply the glue in a thin layer, which is not suitable for protecting against cracks. As soon as the vapor permeability of the block is broken, they will immediately appear on the surface of the thin-layer plaster for aerated concrete from the adhesive mixture;
Choosing the option of finishing walls made of aerated concrete indoors while maintaining the natural vapor permeability of the material, they use plaster mixes on gypsum and gypsum putty. Due to the slaked lime and perlite sand in their composition, water vapor easily penetrates through the plaster layer. Another advantage of this option is that there is no need to prime the surface of the enclosing structures.
Slightly less commonly used as internal plaster aerated concrete walls such mixtures, which contain a high content of such natural materials with a high degree of vapor permeability:
Their vapor permeability indicators are higher in comparison not only with internal, but even with external plaster, and the dried solution is easily rubbed off, acquiring ideal whiteness. The resulting coating has excellent durability and allows further finishing.
You should know: Due to the porous structure of concrete, it is recommended to putty it only after applying a primer. If this is not done, cracks will appear on the putty.
When choosing the finishing of aerated concrete indoors with the elimination of vapor permeability, that is, with complete isolation enclosing structures, one of the materials is polyethylene film. The easiest and fastest way to fix it on the walls is to lay it under one of the finishing layers. However, the speed and ease of installation does not matter if condensation forms on the structures finished in this way and the plaster swells. A more suitable option for plastering aerated concrete inside a house is a sand-cement mixture, which does not contain additives in the form of dolomite flour or lime. With its help, the vapor permeability decreases several times, however, the possibility of plaster peeling increases after a while.
Additionally, to reduce vapor barrier, without too much affecting the quality of the finish, will help:
To finish the aerated concrete with your own hands, you need to use the same tools that are needed for ordinary plastering. To prepare the plaster mixture, you need a special container - such as a plastic tank or a bucket made of the same material. They should be large enough to accommodate all the ingredients for the plaster.
Water is added to the dry mixture that is poured into the tank. The mixture is mixed to the desired state with a drill with a nozzle or a construction mixer. As a rule, it is possible to determine the proportions of material and liquid by the inscriptions on packages with building materials.
Plaster of aerated concrete walls is applied inside the room by "throwing" with the help 
such tools as:
The surface is rubbed with a trowel. And the excess solution from the wall can be removed with a half-scrubber. It is required to level the wall with the help of beacons, and to pull together the plaster mortar is the rule. Another tool that you cannot do without when performing work is a rail length from floor to ceiling. With its help, defects on the walls are checked - deviations of no more than 6-7 mm are considered permissible.
Having decided the question of how to plaster the walls of aerated concrete, they proceed directly to the performance of the work. They begin, like all surface finishing methods, with the preparation of the base. The blocks are cleaned of mixture residues and the seams between them are closed. Before plastering aerated concrete indoors, a layer is applied to the porous surface.
Solutions for aerated concrete blocks, assuming the preservation of vapor permeability, also
they are able to pass steam, differing not only in high water-repellent properties, but also in the ability to strengthen the enclosing structures. The primer is required to be applied not in one layer, but in several. In this case, it must be taken into account that a new application is carried out only over a completely dried old one.
When applying the priming solution over the rough aerated concrete plaster, it is required to maintain the layer thickness at the level of 4–5 mm. It is recommended to add slag sand to the primer. When applying the finishing plaster layer, it is advisable to use building material, which contains fine sand, which increases the smoothness of the blocks.
Before plastering aerated concrete inside the house, let's figure out the properties of this material for the construction of walls. Aerated concrete blocks have a number of advantages, low specific gravity (2 times lighter than silicate bricks). But their plastering is done according to the rules.
The construction of houses using aerated concrete blocks is carried out quickly, since due to the low weight of the material, the laboriousness of wall installation is reduced. Aerated concrete has a low thermal conductivity, so the coefficient of thermal resistance of the material is 2-3 times less than that of ceramic bricks.
The cellular structure of aerated concrete and wood creates the same microclimate in the house. An increase in the density of aerated concrete blocks during their production causes a deterioration in the heat-saving properties of the material. This requires appropriate wall decoration. The porous structure of this material provides excellent sound insulation in rooms. Walls both "breathe" and let water vapor with carbon dioxide.
Aerated concrete is a good thermal insulation, since it has an open porous structure and great strength, and it is also a fireproof material. Adhesives are used for laying blocks, this helps to maintain the exact geometric dimensions of the building. The very process of building walls does not require professionalism.
Another advantage of the blocks is a reduced sensitivity to the negative effects of the external environment. The disadvantage of aerated concrete is considered to be low bending strength. If we take into account this characteristic of the material, then the construction of a house from it is carried out on the basis of a number of measures.
These include:
Before finishing walls made of aerated concrete, take into account that they are very different from brick in their properties. Aerated lightweight concrete has always played the role of insulation. After the insulation of the house from aerated concrete from the outside began to be carried out with the help of special heat insulators, the use of blocks was associated only with the construction of the building structure.
Since aluminum powder is mixed into the raw material for aerated concrete, the structure of the blocks becomes cellular, which increases their vapor permeability. This is taken into account in the process of finishing the walls of a building made of aerated concrete blocks.
Plastering is the most common method used for interior and exterior finishing of vertical surfaces. Before insulating a house from aerated concrete, you will need to plaster the surface of the walls. They begin this work from the inside of the building, after which they move on to finishing and begin to insulate the facade of the house. The mistake will be the primary plastering of the building from the outside and the execution of interior decoration work on cold period of the year.
Most of the water that is used for finishing works on interior walls, goes out through the walls and through the ventilation ducts. Subzero temperatures lead to the formation of condensation from water vapor particles inside the walls, as well as on exterior decoration... After the water freezes, the plaster cracks and peels off. This is proof that it is necessary to plaster aerated concrete walls from the inside of the house, and not on the facade.
A layer of plaster on the wall should not interfere with its vapor permeability, therefore, a solution of a mixture of cement and sand is not used for plastering the walls. When performing work, one of the methods of interior wall decoration is used. The first of them is based on the fact that the material has a special property that ensures the vapor permeability of the walls.
If, when plastering blocks of aerated concrete, a cement-sand mortar is used, then, due to their structure, they will quickly absorb moisture. As a result, the surface of the walls will dry out and become covered with cracks. It will not be possible to correct the situation even after using a deep primer or putty.
Another reason why a cement-sand mortar is not used for internal plastering of a room is the low vapor permeability of the walls. When brick house already built, then this quality of plaster is no longer important. If aerated concrete was used in the construction process, and not brick, then improper plastering of the walls will cause a deterioration in the microclimate inside the building.
In hardware stores or on the market, special mixtures are sold, with the help of which they perform high-quality plastering of aerated concrete blocks. The finishing is carried out according to the principle of maximum vapor barrier of the blocks. The microclimate conditions inside the aerated concrete house will not differ from reinforced concrete buildings.
The outer layer of plaster will be durable. This is due to the fact that after the time that it takes for the moisture balance to be established in the aerated concrete wall, the supply of steam to the external environment decreases. As a result, the plaster will not flake off from the facade surface.
The use of plaster compounds based on gypsum and gypsum putty increases the vapor permeability of aerated concrete walls. This figure should be high as customers and builders choose aerated concrete. Decoration Materials on the basis of gypsum are produced with the content of slaked lime and light perlite sand. After plastering with these compounds, it is not required to prime the surface of the walls. The finished plaster is able to easily conduct water vapor.
Plastering the walls inside the house using ready-made mixtures with fillers creates a high-quality cladding layer. It includes the following types of fillers:
It is necessary to choose the right fillers and pay attention to the size of their constituent parts. All fractions must be combined in a single lining solution. Manufacturers producing such mixtures have achieved the convenience of their use. The compositions are easy to rub, they differ in the maximum degree of whiteness.
Polymer additives with a high vapor permeability coefficient provide more quality coverage than outdoor plaster. Aerated concrete has a porous structure, so it makes no sense to immediately apply putty, otherwise you will need a lot of primer. It will no longer be possible to save on it, since this will lead to the fact that the putty will begin to crack and fall off.
Polyethylene is often used for vapor barrier when finishing the interior surface of the room. This is the easiest method. But often after the work is done, there is an accumulation of water particles and swelling of the plaster.
During the construction and decoration of walls made of aerated concrete blocks, a good vapor barrier is required. Here they use plaster made of sand and cement without special additives - dolomite flour or lime. This type of internal plaster can significantly reduce the conductivity of water particles. In this case, the plaster will peel off, but the choice of this technology remains with the developer.
Before performing work on plastering surfaces, the blocks are primed using a special solution. It is applied 3-4 times. Remember that the use of modern block finishing compounds results in a 25-fold reduction in vapor barrier. High-quality adhesives, which are widely used in construction, are capable of eliminating the transmission of water particles. It makes no sense to apply putty.
It is necessary to carry out the finishing work of aerated concrete walls with the same tools that are used for ordinary plastering. To prepare the solution, a suitable plastic container is used, in which it is convenient to dilute the plaster. You will need a construction mixer with a stirring pad.
After adding water, the dry mixture is brought to homogeneity and the required density. The proportions of the components of the composition are indicated in the instructions for the mixtures. The plaster is applied to the aerated concrete using a trowel using a throw-over method. You can use a plaster bucket. In some cases, a trowel is used.
The plastered surface is rubbed with a float. To remove excess mixture from a wall that has large area, use a trowel. Align the wall using beacons. The plaster shrinks between the guides with the rule.
A vapor-permeable finish is also performed using plasterboard panels. The process technology must be observed:
After finishing work, the quality is checked using a lath, the length of which corresponds to the height of the ceilings. It is applied to the wall surface in different places horizontally and vertically. This is how all inaccuracies are revealed. A deviation in the range of 6-7 mm is considered acceptable.
To finish the interior of the walls made of aerated concrete, use different ways... The simplest of them is the application of a vapor-permeable finish, that is, plaster. Before using it, a number of preliminary works are carried out. The very technology of decorating walls made of aerated concrete indoors resembles plastering walls.
Before starting work, the blocks are cleaned of dirt and also leveled. After that, proceed to applying a layer of primer. It must be taken into account that then materials that absorb moisture will be used. The drying time of the primer depends on the type of primer. Usually it does not exceed 3 hours. When the applied composition is dry, proceed to the wall cladding.
The choice of gypsum mixture for plaster is carried out taking into account the purpose of the room. If this is a living room, plaster is used for wall cladding, which is intended for aerated concrete. The plaster composition for plastering is fixed to the wall mechanically.
Gypsum plaster is used only for finishing dry rooms. Apply it in an environment with high humidity not recommended, as well as on highly vibrating surfaces. Gypsum plaster is performed finishing premises, after which aerated concrete blocks it is possible not to putty.
If the aerated concrete surface of the walls is constantly in contact with moisture (in the bathroom), then it is treated with the help of special preparations that resist the effects of a humid environment. In 1 hour after application, the composition on the wall is leveled and the final drying and smoothing of the surface are waited.
There are several ways to plaster aerated concrete walls. If you understand the properties of this material, then you will decide on the choice of mixtures and you can get a good result yourself.
