Wall insulation outside: instructions, prices

In order for the house to be reliable and warm, it is important not only to choose the right building materials and build it, but also to think about competent insulation of the walls of the house from the outside and inside. A layer of insulation is an opportunity to protect the living space from cold air and create a favorable microclimate in the room.

Outdoor insulation: what's special?

wall insulation outside

Facade insulation is an opportunity to improve the performance of a building. Most often, the insulation of the walls outside is performed using mineral wool, polystyrene or polyurethane foam. Proper arrangement of the facade is the solution to a whole range of tasks at once:

  1. You can reduce the cost of heating the room, because competent house insulation will reduce the level of heat loss.
  2. The presence of the insulating layer will protect the walls from mold. If they are properly insulated, condensate will not accumulate on them, which means that they themselves will serve much longer.
  3. If you choose the material correctly, you can significantly save on the costs of buying construction materials. So, a layer of foam will provide the same degree of protection as a brick wall with a thickness of one and a half meters.
  4. The main requirement for modern buildings is to achieve energy efficiency, so the insulation of each object should be thought through at the design stage.
  5. Insulating materials show low thermal conductivity, so the temperature is optimal for living indoors.

We take into account the nuances

When choosing how to perform wall insulation outside, pay attention to the following factors:

  • operational properties of the material from which the house is built;
  • area that will be warmed;
  • climatic conditions of the region;
  • their financial capabilities.

Wall insulation outsidecan be done in several ways:

  • Fastening heat insulator based on glue.
  • Plaster finish.
  • Arrangement of a three-layer non-ventilated wall.
  • Installation of ventilated facade.

The wall must be protected by a waterproofing layer, on which the insulation is laid, the installation of windscreen is performed.The framework is sheathed by lining or any other type of siding. All modern insulation materials must have the required degree of moisture resistance, vapor permeability and thermal conductivity. These parameters must be correlated with the climatic conditions in which the installation will be performed.

External wall insulation should be carried out in accordance with SNiP, GOST, SP, but it is best to apply for design in specialized organizations. In the development of the need to take into account the amount of heat loss through the exterior walls, windows, doors, ceilings and roof. Based on these data, a decision is made on the choice of material and its thickness for each specific type of wall. After that, the type of insulation is determined.

How to prepare the walls?

Once the insulation material is selected, the process can be dealt with directly. It is important to first prepare the surface for finishing work. If you want to remove the old materials, you need to start work with this. The main thing is to get a flat surface, whatever material is chosen - brick, blocks or wood. Careful attention should be paid to the primer, especially if there are dimples or protrusions in the wall. The primer should be applied only deep penetration - so the layer will turn out even and high-quality.

wall insulation outside foam

Penoplex: modern materials to help!

Warming the house outside is the easiest way to heat insulation, because it is through poorly insulated walls that most of the heat comes out. One of the safest, environmentally friendly, high-quality and moisture-resistant materials today is Penoplex. Warming the walls outside with this material allows you to effectively save heat and save energy costs. This type of material is used for insulation of enclosing structures from the outside, including the basement, walls, partitions, and facades. Thermal insulation penoplex - an opportunity to save on materials, since the thickness of the plate is enough for wall decoration. The most effective way is to use this insulation outside:

  1. It creates perfect adhesion to the surface of finishing materials.
  2. Penoplex are heat-insulating plates which are steady against deformations, moisture, at the same time they can be applied also as a covering under decoration by clapboard or a siding.
  3. Penoplex can also be installed as a plastering system, thanks to which it is possible to transform the facade and make it original and interesting.

Thermal insulation penoplex: what are the features?

External wall insulation with this material allows you to achieve the following indicators:

  • high level of thermal protection;
  • lack of water absorption;
  • high strength;
  • durability;
  • environmental friendliness;
  • safety - polystyrene is in the composition of penoplex, which is environmentally safe, convenient for cutting, does not crumble and does not create dust.

external wall insulation

On the other hand, the foam panels can be destroyed under the influence of organic solvents, besides, there may be difficulties in fitting and cutting the insulating material. The average cost of one cubic meter of material is about 4,000 rubles, so the insulation of wooden walls outside the country cottage will be effective, but expensive.

How to work with polystyrene foam?

Warming of the walls outside with expanded polystyrene begins with the fact that the first layer of foam sheets is leveled. The material is fixed by means of adhesive solutions, after which the sheets need to be attached and flattened against the wall. By means of a plumb and level we adjust the correctness and flatness of the sheet installation. After the first layer of foam has grabbed, you can proceed to the installation of the second. In this case, the sheets must be slightly offset with respect to the previous layer.In work anchor fastenings are used. When making the corners of the building and window openings, the foam is fixed by means of metal corners.

wall insulation outside polystyrene foam

To remove the seams between the joints, they can be treated with reinforcing plaster tape. A reinforcing mesh is mounted on top of the material, and then plastering is carried out. Expanded polystyrene as a heater is excellent for thermal insulation of walls made of brick or solid concrete. Warming of the walls outside with foam plastic suggests that the surface should be dried out with high quality, so it is best to equip the facades with the help of ventilated systems. After using this material, the walls must be even, without gaps, to protect the material from rodents.

Foam features

Polyfoam is a material consisting of a huge number of balls that are filled with air. It differs in ease, ability to constrain heat indoors. As a result, the material has:

  • good sound insulation;
  • simplicity and ease of installation;
  • resistance to temperature extremes;
  • resistance to rotting, swelling;
  • long service life.

On the other hand, low vapor permeability and susceptibility to fire leads to the fact that it is inappropriate to perform wall insulation outside the foam in wooden buildings. Depending on the thickness of the material and the brand, one foam sheet of the size of a meter per meter costs from 30 to 300 rubles.

Penoplex wall insulation outside

Mineral wool use

Warming of the walls outside with their own hands is most often performed using mineral wool. First, it is cheap. Secondly, the process of laying material is simple. In order to secure the sheets to be carried out reliably and efficiently, the laying is carried out on the frame system and the crate of wooden beams. The crate should have a smaller width than the sheets of mineral wool, at least a few centimeters. This will avoid the occurrence of gaps between the bars. In addition to crates, you will need to use anchors, which are put on sheets of material. If the wall is uneven, it will require laying of mineral wool in two layers.

Insulation features

Warming of the walls outside the mineral wool is universal. However, many varieties of material can be stacked using a reinforcing mesh.When using this insulation, you can build a horizontal crate. At the same time, windscreen protection in the form of a dense polyethylene film will be required. Facing can be made of any materials. The use of mineral wool is an opportunity to create a good ventilation of the house, on the walls of which no fungi, decay and other harmful microorganisms will form. In addition, mineral wool has high thermal insulation properties, low thermal conductivity and hygroscopicity. The disadvantages of the material include the fragility of the compression and loss of the original form, moreover, such insulation does not differ in durability. The average cost of mineral wool is 1200-1600 rubles per cubic meter of material.

Polyurethane: Pros and Cons

This material is similar to mineral wool, since it requires the erection of a frame structure and an external windscreen. Warming the walls outside with the use of this material suggests that the solution will be poured between the wall and the film. This solution shows good adhesion to the wall, so excellent thermal insulation performance is achieved.However, in private housing polyurethane foam is used mainly in the design of attics and roofs. The explanation for this is the complexity of the work, because polyurethane foam is a foamed liquid.

wall insulation outside mineral wool

Warming of a wooden house

Before arranging the insulation, it is important to prepare the surface for the installation of the vapor barrier. This layer is needed to ensure that the facade of the building is well ventilated. Most often for these purposes such materials as dense polyethylene, bituminous roofing material, aluminum foil or a special vapor barrier film are used. Accordingly, the fastening will be carried out taking into account the characteristics of the selected material. For example, in a log house there is no need for a ventilated layer, since the tree itself has a breathable structure. If the walls are made of timber, then the facade ventilation is indispensable. With thermal insulation, it is important to make a crate, which is performed with the laying of the insulation layer. The main thing is that the materials fit snugly to the frame.

It is worth remembering that in a wooden house, the main heat loss goes through the interwall seams. That is why the need to use a special sealant, which compensates for the movement of the log and does not trap moisture in the joints.The main thing in the construction of a wooden house - to ensure a balance between the wooden wall, a layer of insulation and a layer of exterior.

Warming of the house from brick and foam concrete blocks

Experts advise laying in three rows, but this will result in large cash expenditures. That is why, instead of building an additional brick layer, it is better to use insulation materials that, according to the degree of insulation, will not be inferior to brick. As insulants suitable mineral wool, penoizol, foam, fiberglass, polystyrene foam. Thanks to the convenience and ease of mounting, it is much easier to lay the insulation layer than to build an additional brick wall.

The use of foam blocks is one of the most common types of construction. In this process, an important role is played by the understanding that such a house can not be warmed. Even one layer of this material eliminates the possibility of condensation on the walls, and if you build a thermal layer, it is best to do this with the use of a ventilated facade. In addition, if you warm the house of foam blocks, you have to sacrifice its strength.Due to the presence of pores in the composition of foam blocks, the heat exchange will slow down, and the strength will also decrease.

insulation of wooden walls outside


Thus, the walls of houses from any materials need warming, only it should be carried out competently, with accurate calculations and the choice of building materials. On the insulation of the walls outside the price depends on what material you choose. The cheapest, but not the most reliable option - mineral wool, the more expensive - penoplex plates. Choose only you.

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