Block house decoration. All about the external finishing of aerated concrete

The question often encountered at various construction forums - how to finish the facade of a house from aerated concrete, became the reason for collecting information on this topic. Having revised it, we offer edited and specific information in which we will tell you what this wall building material is, why it must be closed, what materials are used for this, and how they should be laid in order to obtain a high quality end result.

What is aerated concrete

This material belongs to the class of artificial stone and the group of cellular concrete. The material is based on cement, sand and special substances that, when interacting with water, emit gas. The latter, inside the mass of the solution, forms bubbles. When dried, a durable stone of a bubbly structure or, as experts say, a cellular structure is obtained.

It is gas bubbles that make aerated concrete light with high thermal insulation characteristics. That is, aerated concrete houses are very warm. And if you correctly approach their construction, taking into account the width of the blocks, then you can not additionally insulate such a building. There is an opinion that aerated concrete absorbs moisture well, under the influence of which it cracks, crumbles and collapses. That is why the facade of houses made of aerated concrete must be finished with materials with higher waterproofing qualities.

Video description

In our video we will talk about Japanese facades. Let's take a closer look at what errors occur during the installation process:

This is incorrect information. In autoclaved aerated concrete, the moisture resistance index does not exceed 20%. In a brick, it is 10-16%, that is, not so much better that one could talk about the low rates of the first. And if you build the roof of the house correctly, creating a good overhang that protects the walls from atmospheric precipitation, then aerated concrete walls can not be finished with anything.

It's just that aerated concrete does not have the most presentable appearance. Therefore, this wall material must be finished. Let's look at the options for finishing the facade of a house made of aerated concrete, what materials are used for this.

Plaster

This is a traditional way to give a house built from different building materials a presentable appearance. This finishing technology is called "wet". And since aerated concrete still has an increased absorption of moisture, ordinary plaster mixtures will not work here. Manufacturers today offer solutions in which special additives are added. They retain moisture on themselves, preventing it from penetrating into aerated concrete blocks.

The process of applying the plaster mixture to the aerated concrete surface is no different from the traditional technology.

The facade of a house built from aerated concrete blocks, cleanse from dust and dirt.

Inflict two layers primers. The first must be dried before applying the second. For this process, special primers for aerated concrete are used.

Installed on the facade surface with self-tapping screws reinforcing mesh made of either fiberglass or polymer. Such meshes are called plaster synthetic. They are sold in rolls or by the yard.

The dry mixture is prepared, that is, it is poured into a container with water, where it is thoroughly mixed.

Apply in an even layer certain thickness.

After drying apply the finish coat are usually dyed.

Note that in addition to ordinary plaster, decorative varieties can be used. The application technology is the same.

On our website you can find contacts of construction companies that offer the service. You can directly communicate with representatives by visiting the exhibition of houses "Low-Rise Country".

brick cladding

Facade blocks for exterior decoration of a house on the market are represented by a fairly wide range. The most commonly used material is facing brick. It is lightweight, that is, it does not require a complex base to be built under it, with a smooth front surface, which ensures the presentability of the exterior finish.

Brick cladding is also a "wet" process. Therefore, two different technologies are used for its clack.

Technology #1

For this, a cement mortar is used, in which moisture-retaining additives are added. The lining process itself is carried out according to standard technology. Firstly, for this, even at the stage of foundation construction, a platform is left for laying bricks. That is, the width of the foundation should be greater than the width of the gas blocks by the width of the brick and masonry mortar.

Brickwork is carried out with an offset of half a brick, that is, with a bandage. The main thing is to strictly adhere to the thickness of the seams, which should not exceed 10 mm.

Technology #2

This method is a kind of ventilated facade for a house made of aerated concrete. The essence of the technology lies in the fact that a small gap is left between the cladding and the walls of the building, in which air circulates. It turns out a ventilated layer that removes moist air vapor from the walls of the house, thereby preserving them from the negative effects of moisture.

There are several types of structural elements of a ventilated facade. That is, the brickwork with which the wall is lined must somehow be attached to this wall. The simplest option is metal brackets, which are driven into aerated concrete blocks at a certain distance from each other, both in height and along the length of the facade. Brickwork is attached to them. More precisely, part of the bracket falls into the seam between the bricks. Therefore, it is very important to correctly install the holding device.

On our site you can find the most popular projects of houses from aerated concrete from construction companies represented at the exhibition of houses Low-Rise Country.

The more brackets, the stronger the connection between the facade and the cladding. As practice shows, in height the holders are installed every 4-5 rows of bricks, along the length of the facade every 1-1.5 m. This is considered sufficient for low-rise construction. If the house is more than two floors, then for a brick ventilated facade, complex base structures are used, which include:

brackets, which are attached to the wall of aerated concrete;

guides installed between the brackets;

horizontal belts for laying bricks.

All elements are made of either galvanized or stainless steel.

There is another option for constructing a ventilated brick facade. Here, the construction of the house and its lining are carried out in parallel. That is, aerated concrete blocks are stacked in the wall and immediately next to the cladding wall. To create a bond between two building structures, a metal mesh is laid between the assembled blocks. For example, through every third aerated concrete block. The photo below shows the facade decoration in this way.

Wall cladding is not only brick. Aerated concrete blocks can be closed with clinker, ceramic tiles, porcelain stoneware. That is, in this regard, aerated concrete walls are no different from others. The main thing is to use adhesive solutions for aerated concrete.

Ventilated facades

Let's make a reservation right away that a ventilated facade for a private house made of aerated concrete is an ideal finish. To do this, a crate is constructed on the wall, in a different way, a frame. It is assembled either from wooden bars with a section of 40x40 or 50x50 mm, or from galvanized metal profiles, which are used for mounting gypsum boards. The second option is better, because the metal under the influence of changing humidity and temperature does not warp and does not change its dimensional parameters.

As for the facing material, there is a wide range that the modern market offers. Here are just a few of the most popular options today: lining, siding, block house, decorative boards made of cement mortar, polyvinyl chloride, a mixture of polymers and wood shavings. Many manufacturers offer cladding as a set, that is, a crate is also attached to the finishing material. This is very convenient in the sense that there is no need to adjust the frame elements to the dimensions of the facing material.

Cladding assembly technology

The frame is assembled quite simply. In fact, these are guides installed on the wall in a vertical position. The main task of the work manager:

install profiles vertically and in one plane;

installation step is determined by the length of the finishing material, for example, lining and block house have a length of 3 m, siding 1 m.

Important - the cladding elements are joined only on the guides. Fastening is carried out with self-tapping screws or clamps.

For example, how siding is used:

At the very bottom of the crate set start profile, which is attached to the profiles with self-tapping screws. Installation is carried out strictly horizontally.

From the corner of the building to the crate install corner piece, which is also fastened with screws to a profile installed near the corner of the house.

Installing the first siding panel at the bottom of the façade, inserting immediately into the start and corner profiles. Attached with self-tapping screws.

next to him second panel installed. Thus, the bottom row of lining is assembled.

Then they move on to assembly of the second row. The first panel is inserted into the corner profile, and its spike into the groove of the bottom panel. Attached to the frame with self-tapping screws.

The last row may not fit in height. This means that the siding panels will have to be cut to the required size.

At the very top, before installing the last row, they mount finish profile, which will cover the cut edges of the panels. In addition, this element will give the finish completeness.

Video description

The video shows in detail how a house built from aerated concrete blocks was lined with siding:

Facing with decorative panels

This finishing material appeared on the market relatively recently. But he took his place "under the sun" thoroughly. Firstly, decorative facade slabs are a huge variety. Secondly, it is a ventilated facade, with all the ensuing advantages. Thirdly, it is the simplicity of construction, plus the low price of the material.

Manufacturers today offer decorative panels made from different materials and compositions. Here and on a cement basis, and on a polymer, and on a wooden one. Composite materials are very popular, having excellent not only decorative qualities, but also strength characteristics: wear resistance, moisture resistance, frost resistance and others.

The mounting method is exactly the same as for siding. Many manufacturers offer a complete set with a crate and fasteners, as well as additional elements. There are so-called thermal panels on the market. In fact, this is still the same decorative finish, only each of its elements is insulated with heat-insulating material, which is glued to the back of the panels. By the way, this finishing material can be laid in a “wet” way using tile adhesive. The same technology is used here as with ceramic tiles or porcelain stoneware.

flexible stone

This is the most modern version of the exterior decoration of houses made of aerated concrete. This material got its name due to the fact that it bends well, although the upper front side is a stone veneer or painted sand. It is based on fiberglass, which gives the product a certain strength.

It is very easy to work with this material. The main requirements are a dry surface and a special adhesive composition. We will not tell you how to properly install a flexible stone. Just watch the video.

Video description

The video shows how easy it is to lay a flexible stone:

Conclusion on the topic

So, we figured out the exterior finish of aerated concrete houses: its options, materials, installation and installation technologies. From all of the above, one conclusion can be drawn - the same materials are used in the lining of aerated concrete walls as in the decoration of brick or concrete walls. The only difference, if we talk about "wet" technologies, then here is the use of special masonry and adhesive mortars.

This section discusses the most common and popular methods used by craftsmen when decorating houses built using aerated concrete technology.

We offer all the main technologies for finishing aerated concrete facades:

Plaster

Plastering an aerated concrete house is a simple and wonderful way to protect walls from atmospheric precipitation and at the same time make the building warmer. Plastering masonry from aerated concrete blocks is carried out in the same way as from traditional bricks, that is, using cement mortars. Cement must be of the highest grades so that it is resistant to moisture. In order for the plaster to become a heater at the same time, it is recommended to prepare the first thin primer layer with blast-furnace slag sand. Before plastering an aerated concrete house, you need to prepare the walls by dividing the seams between the blocks to a depth of half a centimeter. Then be sure to remove the resulting dust.

Cement mortar easily adheres to aerated concrete, but still there is an important feature: the blocks are large, so the distance between the seams is quite large. The seams are a kind of reinforcing mesh. There are two options for dealing with this situation. Firstly, you can take a tool and apply such artificial seams on the surface of the blocks, not forgetting to carefully remove dust and crumbs later. Convenient and quick to use, for example, a chainsaw. Secondly, you can simply fix the purchased reinforcing mesh on the wall. The most affordable option is a galvanized chain-link mesh with small cells. It is easy to nail it to the wall with nails, as they go well into the aerated concrete block. It is important to fasten at small intervals so that the mesh does not sag. The nail is hammered in two-thirds, and the rest is bent. Particular attention should be paid to the edges of the mesh at the corners so that it does not bulge, otherwise the plaster will lie crooked and break through the wires of the mesh. When all the preparations are ready, you can apply the initial layer, which plasterers call "spray". In this case, the mixture fills the voids in the grid and creates a solid foundation for the base layer. The spray cannot be smoothed out, it must remain rough. After letting it dry, a primer layer is applied on slag sand. Its thickness is not more than 5 millimeters. The primer layer is already smoothed out. Then the final layer is done. The finest sand is used for it - then the wall will turn out smooth. For the finishing layer, it is better to use dry plaster mixes, since the technology is strictly observed in their production, fine sand is used. If you follow all the rules for these types of work, finishing a house made of aerated concrete will be an excellent addition to your home, both from an aesthetic and practical point of view.

Facing the walls of a house made of aerated concrete with bricks

Recently, if aerated concrete house finishing is required, it has become popular to clad the walls with bricks. This is a very difficult job, which can only be done by professionals, strictly following the engineering calculation. This method is an effective insulation of walls made of aerated concrete and at the same time finishing the facade. The decision to clad the house with bricks should be made even before the construction of the box, since the foundation is made 50 centimeters wider than for the aerated concrete wall. Then two parallel walls - from blocks and bricks - will be located on the same foundation, which means that with seasonal fluctuations they will move together. Facing is done in one layer with a special brick. It is more expensive than regular red, but does not require additional finishing. Brick laying can be done close to aerated concrete blocks or at a distance. At the same time, bricks with blocks cannot be rigidly fixed, since these materials shrink and expand differently in winter and summer.

One of the ways to fasten the cladding to the main wall is to use wire ladders, one edge of which is fixed in the seams of aerated concrete blocks, and the other - between the facing bricks. Instead of ladders, metal pins are often used, one of their ends is hammered into aerated concrete, and the second is fixed into brickwork. You need a lot of pins and ladders: at least one for every meter along the length of the wall and for five rows of bricks in height. In addition, when laying, bricks are laid across every four rows so that one of their ends rests on the aerated concrete wall. This creates an additional support for the facing wall. The distance between aerated concrete and facing bricks is filled with insulation. With this option, the house turns out to be very warm.

Finishing aerated concrete walls with vinyl siding

An interesting and inexpensive option for the exterior of a house made of aerated concrete blocks is vinyl siding. It is available in different colors, types and sizes, so choosing the right option will not be difficult. Siding can be immediately fixed to an aerated concrete wall using roofing screws. They are durable and have a rubber gasket under the hex head. Thanks to this lining, the siding will not be pulled when fastened. The fact is that this material should walk a little to the left and right, since in winter it narrows, and in summer it expands. For this, the mounting holes of the siding are made oval.

Under the siding on aerated concrete, you can fix the insulation. Such decoration of a house made of aerated concrete will not only transform its appearance, but also give it additional thermal insulation.

There are rigid styrofoam boards. They can be fixed on the wall with liquid nails and special plastic "fungi", and siding can be attached to these plates. If soft insulation is used, then under it on the wall you need to create a wooden crate, and between the bars the distance is equal to the width of the insulation plate minus one centimeter, so that the soft plates densely fill the space. It is easiest to mount siding on a wooden crate with wood screws, but without reaching them to the end a little bit. So that the insulation is not saturated with moisture from the house, we stretch a vapor barrier film on the surface of aerated concrete and fix it with a conventional construction stapler.

Siding begins to be laid from the starting element - it is attached to the bottom of the wall strictly horizontally in level. The further type of lining will depend on its location. The level must be used constantly, as the material is flexible and may bend slightly over long distances. It is difficult to notice this right away, but after five rows the view will be spoiled. Vinyl siding is easily cut with an electric jigsaw with a fine-toothed blade, a hacksaw, and even powerful scissors. In the corners, near the windows, at the junctions of the siding with the docking elements, a small gap is made so that the siding plates can “walk” and not warp from temperature changes.

There are several ways to exterior finish a house made of aerated concrete - which one is better depends on the task at hand. If we are talking about a simple option, then this is painting. A little more complicated and prettier - finishing with decorative plaster. And hinged facades are a separate category for which they produce a whole “family” of materials and ready-made systems. In the latter case, in addition to cladding, it is possible to improve the thermal insulation of the facade, although this is not necessary for aerated concrete walls. And the most difficult and time-consuming method is brick cladding. And now about the merits and features of each option.

A house without decoration is like a man without clothes Source dekormyhome.ru

Features of aerated concrete, which must be considered

Gas silicate concrete blocks have an open cellular structure. This has its positive and negative sides.

The advantage is the breathable properties of the walls. The vapor permeability of aerated concrete is higher than that of wood across the fibers. And natural gas exchange with the street creates a favorable microclimate in the house even without the arrangement of an expensive forced ventilation system. But the same property imposes restrictions on the use of certain materials. For example, such walls cannot be insulated with expanded polystyrene or EPS - moisture transfer conditions are violated, and the walls will begin to get wet during the heating period.

The open cell structure is characterized by hygroscopicity - aerated concrete easily absorbs moisture in direct contact with precipitation. For example, the water absorption of aerated concrete can reach 20%, and even for an ordinary brick, this figure is 1.5-2 times lower. It is believed that the gas block must be protected so as not to worsen the thermal insulation properties and maintain the calculated frost resistance. And this is especially necessary when different temperatures act on the same block from two sides, and the dew point is in the middle of the porous material.

The frost resistance of aerated concrete is especially important given the open cells of the structure. Source gazoblok-aeroc.com.ua

At the same time, there are studies that prove that the depth of the layer of active changes in temperature and humidity is in the range of 5-30 mm. That is, even under extreme weather conditions, the outer layer, the thickness of which does not exceed 10% of the total, will itself act as protection for the deep layers. But still it is better to protect this layer. Moreover, with ideal geometry and evenness, the appearance of an aerated concrete block can hardly be called attractive. Based on all these nuances, we understand that the exterior decoration of the house made of aerated concrete is still necessary, which is better to be considered in each individual case.

Important! Despite its high compressive strength, aerated concrete is a brittle material and its surface can be easily damaged.

Coloring

For the most part, gas silicate blocks are placed on glue. The thickness of the horizontal seam does not exceed 3 mm. The vertical seam can be even smaller if the blocks have a tongue and groove profile, and their connection in a row occurs without the help of glue. This is good for thermal insulation, but not decoratively - even ordinary brickwork with jointing looks better. You can’t just take and paint the wall either - the seams will appear even after two layers of paint.

There are two ways to paint the facade of aerated concrete blocks:

• Traditional- on plaster. Apply a special thin-layer plaster for aerated concrete. Sand the surface to a perfectly smooth surface, prime and paint.

To improve adhesion with the plaster mixture, blocks with a corrugated surface are produced. Source n-dom.ru

• Direct staining. For this method, it is necessary that the walls are lined with chamfered blocks, or the chamfer of the blocks is removed before laying. This technique creates the illusion of laying walls from large wall stones with jointing, and this is a classic of construction. The painting process itself takes place according to the traditional scheme: applying a primer, and after it dries, two layers of paint.

Important! For this method of finishing the facade of a house made of aerated concrete blocks, it is better to choose silicone paints. They have high vapor permeability combined with hydrophobic properties - natural gas exchange and moisture transfer will not be disturbed, and rain will roll down without penetrating into the structure of the block.

It looks like a painted aerated concrete facade with chamfered Source stroy-gazobeton.ru

On our website you can get acquainted with the most popular projects of aerated concrete houses from construction companies presented at the exhibition of houses "Low-Rise Country".

Decorative plaster

The high vapor permeability of gas silicate requires a certain sequence of wall finishing. Before the exterior decoration of the house of aerated concrete, it is necessary to complete the finishing work from the inside. When the internal plaster dries, water vapor evaporates to the outside, passing through the walls, which means it can moisten the facade plaster. In addition, before the start of facade work, the wall must “settle” and acquire a stable humidity regime - adapt to operating conditions. This is due to the fact that the own humidity of the gas silicate block, with which it is allowed to put it on sale, can be equal to 30%, and the optimal humidity for finishing is about 15%.

Decorative plaster is applied in two layers. BUT order of work looks like that:

• wall surface primed.
• Inflict base reinforcing layer of plaster notched trowel. The thickness of the layer in the ridge is 6-8 mm.
• Impose reinforcing glass mesh alkali resistant. Press it inside the base layer with a metal trowel, while smoothing and leveling the layer. As a result, the thickness of the "base" should be no more than 4-5 mm.

Mesh for reinforcing a thin layer of plaster improves resistance to cracking Source stroyfora.ru

• Give the base layer dry up. Under normal conditions, the number of days to finish is equal to the thickness of the base in millimeters.
• "Painting" the surface primer.
• Inflict finishing layer decorative plaster.
• Need for staining depends on the type of plaster. Dry white mixtures are dyed, ready-made compositions are tinted in bulk.

Important! When using ready-made mixtures, you must be attentive to the batch number. As with conventional paint, the shades of mass-dyed plaster from different batches may visually differ.

Video description

How to plaster the facade of a house from gas silicate blocks can be seen in the following video:

On our site you can find contacts of construction companies that offer the service of insulation and finishing of houses. You can directly communicate with representatives by visiting the exhibition of houses "Low-Rise Country".

hinged facade

The hinged facade for the exterior decoration of a house made of aerated concrete does not have to be mounted together with a heater. With a width of 375-400 mm of a block with a density of D500-D600, the thermal insulation properties of the facade correspond to modern standards for the thermal protection of buildings in the regions of central Russia. Especially when you consider that the interior finish also has certain thermal insulation properties.

If it was decided to mount a curtain wall together with insulation (for example, with a block width of 300 mm), then it is necessary to complete all internal work associated with the use of mortars - make screeds, apply plaster, lay tiles. Aerated blocks and mineral wool (namely, it is used for insulating aerated concrete walls) will “absorb” moisture, which then must be weathered. And if the work takes place in the fall, then the heating season can be met with a facade that has lost some of its thermal insulation properties.

Both the insulation and the supporting subsystem of the ventilated facade must be securely fixed to the porous block.

To securely fix the load-bearing subsystem of the curtain wall, special anchors for cellular concrete are needed. Source vipsystems.ru

And although the strength and holding capacity of fasteners for aerated concrete is higher than for foam concrete, the choice of anchors or dowels should take into account the characteristics of the base material and the weight of the facing panels. For example, vinyl siding is lighter than fiber cement, and the weight of 1 m2 of a house block depends on its thickness. Therefore, the type of fastener in each case is individual.

Advice! It is better to choose a ready-made ventilated facade system, which the manufacturer adapts to the architecture and building materials of the house.

The rest of the technology is standard:

1. Spend fastening markings carrier subsystem.
2. Fasten through thermal insulation pads brackets for framing.
3. Fix to the wall insulation mats.
4. Lay superdiffusion waterproofing membrane.
5. Mounted facade panels.

This is how a modern system of a ventilated facade for finishing with porcelain stoneware looks like Source giropark.ru

The choice of the type of facade panels very big:

• six kinds siding: wood, vinyl, wood polymer composite (WPC), fiber cement, steel, aluminum.
• five kinds wooden slatted panels: facade lining, timber imitation, block house, planken, deck (terrace) board.
• large format porcelain stoneware.
• Aluminum composite panels.
• facade fiber cement panels under natural stone and brickwork.

Facade panels under the stone are visually difficult to distinguish from the "original" Source sevparitet.ru

Features of brick cladding

Technically, such decoration of a house made of aerated concrete essentially boils down to the construction of another half-brick wall around the perimeter of the building. And so that the weight of the cladding can withstand the foundation, it must be taken into account even at the stage of designing the construction or reconstruction of the house.

Another feature is the difference in vapor permeability. Even for slotted facing bricks, it is significantly lower than for autoclaved aerated concrete. The difference between clinker and hyper-pressed bricks is even greater. Therefore, regardless of whether mineral wool insulation is carried out or not, there must be a ventilated gap between the main wall and the cladding.

The peculiarity of laying in half a brick is that it does not have enough high strength to mechanical stress. In order for such a wall to stand well, it must be literally “tied” to the main wall.

The cladding and the wall can be connected with a mesh if the blocks are placed on the mortar Source stroikairemont.com

When laying building blocks on a cement-sand mortar, different types of ties can be used - reinforcing mesh, wire, nails, metal strips and flexible ties embedded in the seams of both walls.

Important! In the main wall, connections can be laid in horizontal and vertical seams, in the cladding - only in horizontal ones.

In order not to worsen the thermal insulation properties of the walls, it is advisable not to use metal ties. In this case, there are only two types:

• masonry mesh from alkali-resistant fiberglass;
• flexible connections from basalt plastic or fiberglass.

For aerated concrete blocks laid on an adhesive mortar, only flexible connections are suitable. The masonry does not have vertical seams, and the horizontal seams of the large-format block and the facing brick do not match in level. Therefore, in order to “tie” the cladding, holes are drilled for connections in the main wall.

Scheme of facing an aerated concrete facade with bricks on flexible ties Source skqosks.vz.ru.net

General requirements:

• 4 connections are needed for 1 m 2;
• near openings and corners, the number of connections is doubled;
• for ventilation, every third or fourth vertical seam of brickwork at the bottom row and under the cornice is left empty, and if the house has a gable or several floors, then this technique is repeated every three meters in height.

Video description

The brick cladding technology is described in the video below:

Conclusion

It is impossible to say unequivocally which exterior finish of aerated concrete house is better. In each case, the owner of the house has his own preferences, and the architectural features of the building must also be taken into account. Everything is individual - for someone in the first place is the original design of the exterior of the house, and for another it is important to meet the construction budget. For example, in a decorative sense, brick-like fiber cement panels are not inferior to the original, but they are cheaper (especially considering the work). And the price of wooden panels depends on the type of wood, the country of origin and the type of factory processing. But in any case, finishing is necessary, and its properties must take into account the characteristics of aerated concrete.

To build your own house, you can use different materials, but aerated concrete is especially popular. It has excellent thermal insulation properties and allows you to get a really warm house, the main advantages are added: low cost, quick installation, speed of construction and safety for others. There are few disadvantages, and one of them is the limitation in the choice of materials for finishing (for example, the usual use of cement plaster is not suitable, it cannot be covered with film-forming paints). How then to sheathe a house of aerated concrete from the outside, and what materials are better to choose for it or alternatives from foam blocks or gas silicate?

Why not every material is suitable for finishing

Aerated concrete blocks are distinguished by a porous structure (the pores are evenly distributed over the block, approximately 80% filled with air or gas), hydrophilicity (the ability to absorb moisture) and increased vapor permeability (this unique ability of porous concrete ensures that moisture is quickly removed from the room). When sawing blocks during the construction process, open pores appear on the surface and, if they are not covered with a suitable protective layer, they will get wet, oxidized under the influence of rainwater, filled with dust, and darken. As a result, the house will lose its visual appeal and lose its thermal insulation properties. Be sure, when choosing how to sheathe the outside of a house made of foam blocks or aerated concrete, one should take into account the described physical features of the material, and do not use a finish that prevents the diffusion of water vapor from the room to the outside. It is important to maintain the ability of the wall to "breathe".

Thus, cement mortar, foam plastic, film-forming paints should not be used in the exterior decoration of a house made of gas silicate blocks.

What facing materials can be used

Having excluded the prohibited materials from the list of applicable materials, it will be possible to choose the better to sheathe the house from foam blocks from the outside from the following list:

• siding;
• lining;
• front brick;
• decorative rock;
• mineral plaster (specially designed for aerated concrete);
• grouting with subsequent application of facade textured paint (vapor-permeable).

Features of cladding with siding, imitation of timber, clapboard

The most convenient, reliable, and fastest in terms of completion of work is the exterior decoration of a house made of foam blocks with sheet panels, i.e. siding, timber imitation, clapboard. In this case, a ventilated facade is created and it is possible to equip the house with additional insulation (for example, using mineral wool - the cheapest, most practical and durable material).

Before facing the house of foam blocks from the outside, a wooden crate is made on the walls of the building, on which the sheathing sheets are then fastened.

The use of vinyl siding, imitation of timber or lining allows you to design an attractive and fashionable exterior of the building in the shortest possible time. These materials are durable, the ability to perform their installation on their own, they do not require additional decoration. They are recognized as the most optimal and rational solution for various structures (for example, they are suitable for the question: how to sheathe a cinder-cast house from the outside).

brick cladding

Among the options for how to sheathe a foam block house from the outside, facing brick is recognized as one of the best. It is distinguished by the highest strength and durability among all existing facing materials, such a house will be especially warm (which is especially important). But the use of bricks should be foreseen at the design stage and a more solid foundation should be built, because. the weight of such a structure will be much greater.

Given that the vapor permeability of cellular blocks and bricks is significantly different, a gap of about 3 cm should be left between the blocks and the facing masonry (it can be easily provided by a special protective sheet that encloses the foam blocks from the masonry to protect them from splashes of cement mortar). For the gap (it is also called the “air gap”), ventilation must be arranged, for this it is enough to leave a few empty seams in the upper rows of masonry (under the cornice). Also, when choosing for finishing the exterior walls of a house made of aerated concrete, brick, you need to worry about the waterproofing of the basement.

The use of plaster compositions

If you choose the better to sheathe a house of aerated concrete from the outside, based on the price component, then it will be cheaper to use a special plaster composition designed specifically for cellular concrete instead of sheet panels or bricks. Mineral plasters are perfect, they do not contain quartz sand, but are based on a lightweight filler (it can be perlite sand and some others), which provides vapor permeability to the material. The quality and strength of the plaster remains high, excellent resistance to mechanical damage, environmental influences and the formation of shrinkage cracks is provided. Such compositions are applied in a thick layer, gently smoothing out all the irregularities of the covered walls.

Having chosen plastering, in the question: how to sheathe a block house from the outside, do not forget about the need for reinforcement with mesh in problem areas (at the junctions of blocks, breaks and joints of profiles, corners of the facade of the building, in the area of ​​​​window openings).

Painting with facade textured paint

For decorating the wall of a house made of foam blocks, aerated concrete and gas silicate, facade textured paints are also great, their advantage is a wide color palette. You can replace the paint with a thin layer of a special vapor-proof putty (such as, for example, Prospectors), after the coating dries, the wall will acquire a neat appearance. At the same time, do not forget about the preliminary grouting of the seams and the elimination of surface irregularities.

A well-built and well-designed house will not only please the eye for many years, but will also significantly reduce unforeseen expenses for various minor imperfections and miscalculations in the project. Therefore, when thinking about what to make the exterior of an aerated concrete house from, be sure to take into account the structural features of the blocks and use the appropriate finishing materials.

Why "dress" the house?

Finishing the facade of a house made of aerated concrete blocks has two main goals: to protect from the adverse effects of the external environment and to decorate visually. Protection is required due to the technical features of production and structural composition. The fact is that the blocks are cut during the production process after the formation of a porous structure. And this means that some of the pores become open and, in fact, represent holes in which moisture easily accumulates. As you know, when freezing, water expands, and molecular forces easily break fragile internal partitions, which will lead to the formation of microcracks. The building, of course, will not fall apart, but the first line of defense will already be broken.

Feature of porous materials

One of the essential advantages of aerated concrete is its vapor permeability. It is an order of magnitude higher than even in buildings built entirely of wood. This advantage can easily be turned into a disadvantage by using materials that do not have vapor permeability or paints that create a continuous film on the surface for external work.

Therefore, the finishing of aerated concrete walls from the outside is carried out with special light plaster systems that do not prevent the infiltration of water vapor. If this exit is blocked, then the moisture that could not get out will remain in the wall and will gradually destroy it from the inside.

What is the best way to finish the outside of the house

The modern market provides a wide variety of specialized finishing elements, both in terms of material and in a wide range of price categories. Here are just a few of them:

• Siding.
• Clapboard.
• Hanging decorative panels.
• Clinker tiles.
• Natural stone cladding (air gap required).
• Finishing for embroidery (subject to the use of textured paint).
• Decorative plaster.

Panel technology

Finishing with siding, clapboard or decorative panels requires the installation of a crate. It is made of wooden slats 6x4 cm in size. To facilitate the work process, it is better to make all calculations in advance. For example, let's take a working surface area of ​​​​15 m 2.

• When making calculations, do not forget to subtract door and window openings.
• Reiki are installed in increments of 30 cm. Thus, for this area, we need 51 m of running rails.
• Every 40 cm they must be fixed with a screw on the dowel. Total - 128 pieces.
• To mount the panels, we use nails (preferably aluminum). Based on 1 nail per 300 mm - 170 pieces.
• Be sure to add 10% to 15 m 2 of facing material. They will be used for sizing. Total - 16.5 m 2.

The price of siding ranges from 180-320 rubles per m 2.

Lining costs from 140 to 220 rubles per m 2.

A large selection of decorative panels determines a wide range of prices for them. The cost of panels ranges on average from 200 to 1000 rubles per square meter. If you carefully carry out the preparatory work, carefully installing the crate of the rails on the dowels, the installation of the panels themselves is quite easy and fast.

Working with clinker tiles

Finishing the external walls with clinker tiles should be planned at the initial stage of construction, since the foundation should be calculated taking into account the width of the tile itself and the air gap that is necessary for the ventilation of the walls. Do not allow material to overhang even a few centimeters beyond the foundation.

In order to prevent the solution from entering the provided air gap, during the installation process, a sheet of foam can be placed there and moved as the work progresses. To ensure ventilation, small vents are left in the seams between the tiles. There should not be too many of them - only about 1% of the total area. Produhi is best done in vertical seams under the eaves and not far from the foundation. Thus, the external finish of aerated concrete will not interfere with the necessary circulation of steam.

Use of stone

In this case, it is necessary to resort to the technique of a hinged ventilated facade. It is attached to the carrier layer on the wall of the building. The frame is made of aluminum or stainless steel. Between it and the wall, you can put an additional layer of mineral wool insulation. Finishing an aerated concrete house with natural stone occurs in the following order:

• Mark on the wall under the level of the attachment point.
• Drill holes.
• Strengthen the metal frame with dowels.
• Install a layer of insulation (if planned).
• Carry out the installation of facing stone.

Approximate cost calculation per 1m 2:

One of the most economical design methods is to finish the outside of the gas block for jointing. It involves the selection of seams between blocks. This selection is performed by deepening the grooves of the seams or applying paint to them. This option is also desirable to consider even during the initial planning of construction. Because, in this case, it will be possible to preliminarily remove the chamfer from the blocks and subsequently the stitching will turn out to be original and beautiful.

Stitching

It is better to use acrylic paint. It has excellent water-repellent properties and sufficient vapor permeability. It is preferable to highlight the seams with a contrasting color or a darker shade.

The average price of 10 liters of acrylic paint is 400 rubles. This amount is enough to process 100 m 2 of the wall. For greater reliability, it is recommended to apply two coats of paint.

Exterior finishing of your home is a necessary step to protect the building. The possibility of varying materials will allow you to make both a budget option and create your own unique style. It can protect your investment by preventing external factors from destroying what has already been done, and favorably emphasize the originality expressed in the individual design of the facade.

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