Facade plaster for exterior works: properties and application

The exterior decoration of the house is necessary not only to give an attractive appearance to the facade. Coverage allows you to extend the operational period of the building's original building material. Today, as a finishing finish, facade plaster for outdoor works is often used . What attracts this material? We will go further.

Coating properties

External plaster (facade) has many advantages. This advantageously distinguishes it from many other coatings. The facade plaster of the house looks very attractive. In addition, the coating protects the surface from various negative effects that can contribute to damage or damage. Among the main properties that plaster has for facade works, it should be noted:

• Moisture resistance. Under the influence of water, the material does not change its structure. Facade plaster for outdoor works is a protective layer, which prevents the negative impact of moisture.
• Resistance to climatic and temperature changes. The latter is especially relevant for regions in which there is a significant difference between seasonal temperatures. Quality exterior plaster for outdoor works has the necessary resistance to negative influence of atmospheric precipitation, direct sunlight, and some types of coatings also to the effect of radiation.
• Strength. External walls of the building often experience mechanical stresses. Facade plaster for outdoor work has the necessary margin of safety.
• Water vapor permeability. The coating is capable of passing evaporation, which allows to preserve the initial state of the building material.
• Increase of sound and heat insulating properties of the structure. The coating itself provides protection against heat loss. This reduces the cost of heating. For greater savings, a facade insulation is used for plastering.
• A wide range of textures and colors. Facade plaster for outdoor work allows you to implement a variety of ideas. The coating can have any color that is attached to the material by adding a color. You can also improvise and with patterns. It is important to apply the coating layers correctly. If necessary, stencils are used. Different types of coating imitate a particular material. For example, plaster "bark beetle" looks like a tree, the surface of which is eaten by insects.
• Ease of laying the material. The application of facade plaster does not require any special knowledge or extensive experience. Laying material can be done independently in a fairly short time.

Cost of coverage

This is another important advantage of the material. The price of the coating is much lower than that of any other. Plaster facade, the consumption of which on average 10 kg per 4-7 m ² , is in the range of 70-90 rubles / kg. If you hire masters, then their services will cost 250-300 rubles / m ² .

Facade insulation under plaster

Before finishing, you need to choose an insulation material. The most common insulation today is styrofoam (polystyrene) and mineral wool. Both have both pluses and minuses. Experts recommend to purchase material in the form of plates. Both a mineral wool and a foam plastic have such a form of release. The insulation will be attached directly to the wall by glue and additional fixing elements. Minvata has fire resistance, vapor permeability. With her, the walls "breathe". But at the same time, mineral wool has a relatively large weight. It is best to choose diabase or basalt double-layer slabs. They have a more rigid outer layer. The density of such boards should not be less than 140 kg / m ² . Polystyrene is moisture resistant, easy to install, has a low weight, high level of thermal insulation. However, it refers to combustible materials, not as durable as minvate, subject to mechanical damage. In addition, it is loved by different rodents.

Coating technology: preparation

The creation of a "wet" facade is carried out in several stages. First you need to prepare the surface. Work should not be carried out at very high or low air temperatures. Optimal conditions are considered at 15-25 degrees. Otherwise, it is necessary to erect a forest around the building, cover them with a windproof film and form a thermal circuit. Next, prepare the base. The surface of the walls is cleaned of the old covering, debris, dirt and dust. After that, the base is washed and dried. Different chips and protuberances, the inflow of solution are removed with a chisel, a Bulgarian or other instrument. The surface is checked for cracks and depressions. When detected, defects are masked - plastered. The surface should be made as level as possible. This will ensure a tight fit and a strong fixation of the heater. Before its attachment, the surface is primed.

Installation of insulation

The material is glued from the socle profile. Plates are fixed in horizontal rows. The elements should be staggered. It is desirable that the vertical seams of the previous row do not coincide with the joints of plates of the next. During laying, care should be taken to ensure that the error is not greater than 3 mm. Otherwise, all irregularities will be clearly visible after the completion of the work. At the corners, the insulation should be glued with a 2-3 cm overlap. Surplus material is subsequently cut off. The masonry of the material is checked by level. It is advisable not to allow strong swings.

Reinforcement

This process is a uniform coverage of the surface of a special net, which is immersed in a special mixture. The reinforcement is applied over the primer. A fiberglass mesh is fixed from above. In conclusion, it is covered with the same reinforcing composition. The thickness of the layers of the solution is at least 2 mm. Reinforcement begins from the corners of the building, openings (window and door). After this, the material is spread over the rest of the surface. In addition, you can strengthen the openings using a reinforcing profile. It is a perforated metal corner. It is connected to the mesh strips and fastened to the apertures. Reinforcement is best done not in sunny weather, but in overcast, but without rain.

Finish

After the reinforcing compound has dried (and it is not less than 72 hours), you can start laying the facade plaster. As a finish coat, any decorative composition can be used. It can be smooth or textured plaster, with impregnations of different calibers. If the coating is to be painted, the formulations must correspond to each other. For example, for acrylic plasters the same paint is used. The finishing should be carried out in appropriate conditions. In particular, plastering is not carried out in bright sun, in rain, in strong wind, low or too high temperatures. Before applying the solution, the reinforced surface is covered with a primer. It will provide the necessary grip of materials. Also, if it is supposed to cover the plaster with paint, the surface is pre-primed. In addition to the necessary adhesion, the intermediate coating will give greater strength to the finish.

Finally

In general, the application of a decorative composition to the surface is not difficult. In this case, it is important to prepare the foundation correctly. The surface must not contain any defects. The substrate must be clean and dry. It is necessary to use a primer. Ignoring this can significantly reduce the strength of the coating and degrade the adhesion of materials to each other. Experts recommend using the same manufacturer's products. Before applying the subsequent layers, you should wait for the drying of the previous ones.