Exterior finish of the aerated concrete house: options, tips

During the construction of private houses, gas concrete blocks have been increasingly used recently. This circumstance can not be called accidental. This material has a porous structure, which is characterized by high thermal insulation qualities.

Aerated concrete absorbs a lot of moisture and dust, as a result of which it oxidizes, becomes heavy, darkens and loses its quality advantages. In order to avoid this, the exterior of the house is made of aerated concrete. This makes the facade resistant to external influences of the environment.

Variants of external finishing of aerated concrete

Before you perform the work on finishing aerated concrete from the outside, it is necessary to familiarize yourself with the basic technologies. The most economical method is the application of plaster. It is important to choose the right composition, preferring a vapor-permeable viscous mixture. In order to achieve a higher strength layer, you should additionally use reinforced mesh, this is especially true for difficult places, namely:

• Profiles;
• Windows;
• Angles.

The exterior finish of the house made of aerated concrete can be made with the help of a brick. To do this, make the foundation stronger. Its width should include brick and block. Due to the fact that the brick allows less steam than the aerated concrete, an opening is formed between the materials. Its width should be 50 mm. This approach will eliminate the accumulation of condensate inside the structure. Ventilation is provided by empty seams between bricks that are left in the upper part of the walls. The total area of these joints should be 1% of the total area of the building.

If aerocrete blocks have a low coefficient of vapor permeability, then the formation of air gaps can be abandoned, but this approach can not be called the best, because it will increase the thermal conductivity of the walls and lead to cooling of the premises. The cost of heating will be more impressive. Without the formation of gaps, you can enclose summer cottages or houses.

Facing the facades with a brick, you should apply a sheet that will resist the contact of the blocks with the mortar. The canvas is shifted as the masonry moves forward. The cladding can not be laid without supports. For example, a brick is connected to blocks, which will allow to obtain a monolithic construction. This indicates that each square meter should be laid four bonds. They should be provided in advance. For this, metal bands, ties made of basalt-plastic, perforated strip made of galvanized steel are usually used. Elements are inserted into the blocks, while the other side is inserted into the brick.

Use of paint

The exterior finish of the house made of aerated concrete can be done with paint. It will be cheaper than other solutions. Use for this you need a special formulation or putty, which must be vapor-permeable. This will protect the blocks.

Before application, the paint is diluted with water. As a minus of this facing is a rather long time of preparation of external walls. All the seams and unevenness must be cleaned, like dents, and also protrusions. Aerated concrete blocks can be prepared by cutting a chamfer around the perimeter. This will achieve smoothness and smoothness.

Alternative solution: siding finish

Siding is another popular facing material for aerated concrete. It can be made on the basis of different materials. It:

• wood;
• metal;
• vinyl.

This allows to protect the facade from climatic influences. In the role of the advantage of this approach is the ability to additionally insulate the walls by laying the insulation under the siding of the siding. Skeleton, by the way, will perform the main role in the skin, because it will be installed on it panels, the gaps between which will ensure the ventilation of the structure.

Tips for installing fiber cement panels

You can perform exterior decoration of the house made of aerated concrete with fiber-cement panels. Fastening can be carried out directly to the wall by screws. As an alternative solution is the installation of the frame. In both cases, for installation, staple clamps are used, through which the fasteners are screwed into the elements of the battens or the wall.

Fibro-cement elements are fixed to each rack. The distance between the fasteners should be 600 mm horizontally. Kleimers are installed more often in areas of contiguity to door and window openings, as well as in the corners of the building. Such exterior decoration of the walls of the house from aerated concrete sometimes involves the formation of an air gap, which in some cases is used to install a thermal insulation material.

Technology features

Experts do not recommend fastening panels to a frame or a wall without Kleimers, but in some cases this approach is the only true one. This is true if the panels require fixation in areas where it is impossible to install brackets. In this case, the products are drilled through and through, and then the screws are screwed into the holes, the cap of which is heated inwards by 1.5 mm. After the lining is finished, the holes are covered with plaster with moisture-resistant characteristics. For this purpose, you can use paste-sealant, which is selected by color, and sometimes comes complete.

Mounting recommendations

Before you start the work, you can view the photo of the exterior of the house made of aerated concrete. If fiber cement cementing is used as a lining material, then the technology will be slightly different. Elements are installed at an angle, they are located with the overlapping of the upper boards on the lower ones. This allows you to get the effect of a shipboard or Christmas tree.

Siding will be located exclusively on the upper side of the panel and fastened to each of the racks of the frame. When assembling the boards in length, a gap of 2 mm between them should be left to compensate for linear thermal expansion when exposed to temperature. Screws of screws will overlap with the boards fixed above. Plates to the wall can be installed in a frame manner. This involves the use of metal frames, in the grooves of which are installed fibrocement panels. In this case, the surface of the slabs and the slats of the frames will be visible.

About the frame

If the exterior decoration of the house from aerated concrete is carried out with the help of fiber cement panels, the crate can be made of wood or a metal galvanized profile. The horizontal elements from the bar must have a section within 50x30 mm. The distance between them on the wall will be 600 mm. Anchors are used to fix them. Vertical racks of a skeleton, as a rule, have the size within 40x70 mm. They are fixed with two screws. The pitch between the vertical bars is also usually 600 mm. These parameters should also be adhered to, for the reason that thermal insulation is usually manufactured with such dimensions. This indicates that it will be easier to install, and there will be less waste.

Methods of work

In some cases, the lining of fiber-cement slabs and boards is conducted from the blind area to the abutment to the cornice. The base is not allocated. Otherwise, it is necessary to form a zigzag-like frame, the lower part of which will be filled with expanded clay. This material acts as an excellent insulation and will protect against rodents.

In order to exclude the need for plastering of walls, the gap is filled with cement mortar, which is pre-mixed with polystyrene foam or polyurethane foam. Filling should be carried out in sequence, which will occur as the fixing of the finishing panels. If the exterior of the house is made of aerated concrete from the outside by fiber-cement elements, whatever method of installation is chosen, proceed from the bottom of the wall. You can move from the blind area, which is true, if you plan to revet this base with this material.

When cutting slabs, the spili should be painted with an acrylic compound, which is often supplied in the kit. The paint will mask the cut and will protect the end part from moisture and other factors. After the installation of the panels on the basement part of the wall and above it is completed, a metallic tide must be installed. The easiest to install is one that is attached to the wall.

Perimeter finishing of openings

Having considered the variants of finishing the houses from aerated concrete, you can choose fiber-cement slabs, which should be installed also around the windows. In order to cope with this work as carefully as possible, you should use the dividing bars. Gaps are closed with a special decorative corner, which will improve appearance. If wide slopes are formed around the window, then they can be decorated with the same panels, so that the joint turns out to be neat. For this, the starting profile is fixed to the box, and plates are installed in its slots. Gaps before installing them in slabs are greased with a sealant.

Facade plastering

A house made of aerated concrete for finishing should be prepared with a brush. Scales and dents are sealed with glue, which is pre-mixed with the dust of aerated concrete. The minimum thickness of the layer is 10 mm, the material can not be reinforced. In the composition there are cool additives, due to this the mixture will be kept on the surface as much as possible. If the thickness of the layer increases to 15 mm, then it can be reinforced with a fiberglass mesh. A more impressive finish on the thickness of the house made of aerated concrete is not practical.

When choosing a grid, you should prefer the one whose cells are about 3 mm. The material must be resistant to alkaline media. Otherwise, after a while the grid will lose its strength and cease to hold the plaster, and the finishing layer will simply go away. First, a primer mix is applied, followed by reinforcement. This will create a basis for decorative plaster.

Reinforcement

The application of the composition is carried out by a strip. Until the solution has solidified, it should be laid on the net, pressing it with a grater or a notched trowel. As soon as the grid is immersed, a wide spatula should be put in place for alignment. The surface is left in the final stage until dry. This period may vary in time, depending on the material used. Finishing the house of aerated concrete in the next stage involves applying a primer that paints gray and reduces porosity. After the primer has dried, you can move on to applying decorative plaster.

Additional recommendations on what kind of cladding for aerated concrete to choose

Quite often, consumers are asking about the best exterior finish of a house made of aerated concrete. Among other solutions, it is necessary to distinguish a tile, which can be ceramic or clinker. Its surface is able to withstand the effects of corrosive substances and sediments. The weight of this cladding is lower compared to brick, which reduces the load on the foundation. The size of the tiles is small. This indicates that the continuous cladding will be time-consuming.

Sometimes clinker is used to decorate fragments of the facade. In this case, the tile is combined with the plaster. The exterior finish of the house made of aerated concrete can also be made with the help of thermo panels, which are usually used with an impressive facade area. This allows you to decorate and insulate. The front side of such panels in the plant is complemented by stone or clinker tiles. In this case, it is natural.

Conclusion

For aerated concrete walls, one of the many materials that are on the market today can be used as finishing. Among others it is necessary to distinguish porcelain stoneware, which has more impressive dimensions in comparison with clinker tiles. This simplifies the work on solid facade cladding. You can fix porcelain stoneware on a wooden crate or glue. In the first case, it will be possible to ensure good ventilation of the facade.

When the walls are to be insulated, the ceramic tiles can be installed on the aluminum profile. Prepare the facade very carefully. The surface must be protected, the seams are sealed, and the potholes are filled with mounting foam.