With the onset of winter cold, many private and suburban properties made of brick and concrete become completely unsuitable not only for permanent residence, but even for traditional weekends or holidays. But many would like to relax away from the noisy metropolis, gain energy and strength for the upcoming everyday life. And only the inadequacy of the houses prevents this from happening.

A similar problem will never arise if you take care in advance about preparing and insulating your home for the winter season.

To prevent warm air from escaping in cold weather country house, owners can take advantage intelligent system management or at the design stage, think about building a “thermos house” that retains precious heat, or carry out a set of insulation works - both external and external. High-quality and scrupulous execution, the use of modern thermal insulation materials guarantee insulation of the walls from the inside at the proper level and the creation of a comfortable, and most importantly, healthy microclimate in all rooms.

Particular attention when performing thermal insulation works You should pay attention to insulating the corners of the house, otherwise you will have to face problems in the future with their freezing and a decrease in the air temperature in the house.

Reasons for freezing corners in the house

Among the most common reasons for freezing of the corners of wooden and brick houses, there are two main ones: construction defects and the laws of physics.

It is known that each corner of a building represents a so-called geometric bridge of cold. Using insufficient quantities mortar, poor quality and voids in concrete will sooner or later lead to freezing of the corner space in the house. And thanks to the condensation that forms on the bridge due to the huge difference between street and room temperatures, mold and moisture appear, with low temperatures turning into ice crystals. It seems that a completely logical solution to this problem would be to lay thermal insulation material along the entire perimeter of the room. However, such thermal insulation equally insulates the wall surface not only from cold, but also from heat.

insulation work plan
insulating the wall from the inside using polyurethane foam

wall insulation scheme wooden house
insulation of walls from inside a wooden house

Widespread insulation can worsen an already deplorable situation, because the dew point will move by inner surface walls, which will lead to its complete freezing. The thermal insulation layer in this case will only hold back the flow warm air indoors, preventing contact with the wall and increasing the formation of moisture on it. After some time, the thermal insulation material will first become unusable, then the wall will begin to collapse and the cold bridge will increase.

Corners in the house freeze: what to do?

The problem of insulating walls from the inside, and subsequently freezing of corners, can be solved with the help of thermal insulation of the facade, reliable insulation of internal surfaces and high-quality sealing of seams.

Internal wall insulation

Insulation of walls from the inside is used in rare cases (when there is a government ban settlement to replace the facade of the house or behind the wall there is an elevator shaft, unheated room or a deformation chief between houses, this form of insulation can also be included in the initial project, for example, additional insulation in frame or wooden houses). Internal wall insulation most often does not lead to the desired results. Therefore, if you nevertheless decide to insulate the walls from the inside, then you need to do it correctly, following the technology and using the materials intended for this. Materials for internal insulation are selected with the lowest vapor permeability and moisture absorption in order to avoid condensation closer to the inner edge of the wall. It is desirable that when installing the insulation there are no seams or joints.

Such common materials as: mineral wool, cork covering, warm plaster, drywall (it is used only on final stage works) etc.

insulation of walls with penoplex inside the house
thermal insulation with penofol

So, how to insulate walls from the inside? We recommend using the following materials:

1) Polyurethane foam (you will need to use formwork, fill the wall in parts, then install a polyethylene film as an insulating layer, then build an additional one, which will be plastered).
2) Expanded polystyrene or penoplex (the joints of the sheets must be coated with sealant, they should be secured with a uniform small layer of mortar)
3) Construction of the second interior wall With air gap and a layer of insulation (it is possible to use underfloor heating elements, but this method will require large costs and will significantly reduce usable area premises).

External insulation

To insulate walls from the inside, you can use “warm” plaster, containing tiny polystyrene foam granules instead of regular sand. " Warm plaster» is distinguished by visual lightness, good speed of application and setting, high level vapor permeability and excellent thermal insulation properties: a layer of 50 mm of plaster is equivalent to double brick masonry. All these obvious advantages guarantee normal condensation and a healthy microclimate in the house.

Specialized liquid products– suspensions based synthetic rubber or acrylic polymers. Applying several layers of such insulation to wood or concrete successfully replaces a 10 cm layer of mineral wool. Externally resembling paint, the suspension also effectively reflects thermal radiation. Outer side The walls are first treated with mortar using a roller, and then covered with a finishing coating.

Worthy alternative option The walls will be insulated using thermal panels.

Insulation of corners

Technology of the process of insulation of corners of brick, concrete and wooden houses To avoid freezing, it includes several actions:

1. First of all, the walls are cleaned of plaster, wallpaper and other decorative coatings. If cracks cannot be identified visually, then the surface is tapped with a hammer: if voids are detected, the sound will be dull. We prepare all freezing corners, joints between floors, open cracks in concrete by making grooves with a cross-section of no more than 20x20 mm, and detect other defects that can lead to freezing. The corner is thoroughly dried.
2. If there is mold, the surface is treated antifungal compounds. If the mold damage is extensive, it is recommended to use blowtorch or carefully mill the surface.
3. Treatment of identified voids with a special thermal insulation material, for example, liquid foam or, which guarantees the appearance of moisture on the inner surface of the walls.
4. The remaining foam is removed from the wall. The corner is plastered.

The best time to insulate the walls from the inside of a building is the warm season, otherwise it will be quite difficult to get rid of mold on the walls and dampness in the room.

How to prevent corners in the house from freezing?

To prevent corners from freezing, it is enough to resort to some architectural changes. For example, round or bevel corners in a house. You can significantly insulate the walls inside using pilasters on the outer corners of the building. To prevent the appearance of condensation, you can use non-standard and interesting design solutions: under the ceiling in the corner, fix a plasterboard box with decorative lighting from traditional incandescent lamps. The outgoing light flux will not only illuminate the room, but also heat the surrounding air, thereby preventing the appearance of moisture and mold.

If your house is made of logs, then at the time of its construction you should carefully fasten the crown logs in the corners with a cut lock using thermal insulation materials. Such measures will reliably protect wooden house from freezing corners.

Insulation of corners from the inside

Insulation of vertical joints of wall panels from the inside

One of the reasons leading to freezing of vertical corners in apartments is a construction defect, namely the absence of an insulation liner at the junction of the outer wall panels. Unfortunately, in this case the repair interpanel seams, produced from the street side is completely useless. The only way to eliminate freezing is to insulate the problem corner from the inside, i.e. from the apartment.

The procedure is quite labor-intensive, noisy and dusty, in general, disturbing for those living in the apartment, but, alas, there is no other way. Many, trying to take the easier route, insulate the freezing corner with foam plastic or other insulation and cover it all with plasterboard. The effect is quite good, especially in the first year or two. And then mold begins to appear from under the drywall, and everything starts all over again. Why is this happening?

Let's figure it out. The fact is that Wall panel designed for operation in certain climatic conditions: outdoors up to -37 C, in an apartment +22 C. Inside the stove there is a so-called. dew point is the place where the temperature is 0 C and condensation occurs. The slab is designed in such a way that this very dew point is as far as possible from its inner surface. What happens when we insulate our corner using the “easy” method described above? It’s all very simple: the heat from the apartment, which should warm up the panel from the inside, thereby pushing the dew point as far as possible towards the street, simply does not reach the surface of the stove, because our insulation prevents this. On the other hand, nothing prevents the cold street air from freezing the slab right through. It turns out that the dew point moves to the inner surface of the slab, and only a layer of insulation separates us from it, i.e. This is where condensation occurs and, consequently, wetting occurs. It is clear that fungus begins to develop on a damp surface. By the way, a similar process occurs in cases where there is a carpet hanging on the street wall (especially in rooms facing the end of the house), or even just a wardrobe or other furniture. Difficult access of heat to such a wall, plus insufficient air movement, do their dirty work, and freezing begins in this place.Therefore, we recommend not saving, as they say, “on matches,” but deciding and once and for all solving the problem of a freezing corner. Our specialists carefullyremove concrete (1) , located by the will of the builders where the foam liner should be,fill the resulting cavity with polystyrene foam and polyurethane foam (2) , and then -plastered (3) , i.e. will bring your corner to the state in which it should have been from the very beginning.

Uninsulated corner apartments are valued cheaper, simply because they are cold. There are two adjacent walls in contact with the street, and between them a corner that freezes from the inside.... - horror for residents. Such rooms in corner apartment maybe two.

Insulation from the inside is not the best option solving the problems of the corner apartment, but sometimes only he remains. This method can also be used to solve main problem corner apartment - cold.

First of all, it is advisable to weigh the pros and cons. External insulation of a corner apartment will not be cheap.
But even the internal ones cannot be called a pleasant waste - it is expensive, there is many times more hassle, and doubts will remain about the correctness of the actions.

Outside or inside?

But if these arguments are still not interesting, then it remains to consider how to properly insulate a corner apartment from the inside, so as not to spread dampness and mold inside the room and not cause other troubles...

First choose insulation and plan

To insulate a corner apartment from the inside, you need to choose insulation. In this case, the only acceptable option is extruded polystyrene foam. It does not allow steam to pass through and does not accumulate water. And if it is tightly glued to the wall, it will isolate the wall from steam, and condensation inside the room will not occur.


You need to be wary of recommendations to use any other insulation for insulation from the inside, simply enclosing it plastic film. The insulation will still pick up water and the wall will be wet. In any case, the risk is very high, since there is no ventilation.

The thickness of the insulation should be sufficient - from 8 cm for moderate climates.

Prepare walls, dismantle

As a rule, in a corner apartment, even on walls without windows there are heating devices, pipeline. All heating needs to be redone - moved away from the wall by the thickness of the insulation and finishing.

You will have to dismantle the sockets, seal the niches, and extend the wires to the overhead sockets above the insulation. Or dismantle all electrical wiring and re-lay it on top of the finish.

The walls are cleared of old decoration and weak plaster. The surfaces adjacent to them are also cleared of all finishing by 10 cm - the insulation will be glued there.

On the wall with a window, the window sill is removed and the slopes are cleaned. Naturally, the windows must first be replaced with insulated modern ones for both internal and external insulation.

Next, the walls need to be leveled using cement mixture so that the insulation sheet is completely adjacent to them anywhere. And if the walls are not level, then you will have to apply a thick layer of plaster, which, perhaps, will negate all the savings from insulation from the inside in a corner apartment...

Laying insulation

Before applying insulation, the walls must be dry, smooth, primed, and the temperature must not be lower than + 5 degrees. Any primer will do deep penetration It is possible without antifungal additives.

Purchase adhesive for polystyrene foam on concrete and extruded polystyrene foam of sufficient thickness, with a tongue and groove along the edges of the sheets. For gluing joints, sealing seams, cracks, you need a sealant, or better yet, polyurethane-based foaming adhesive in a can.


Concrete adhesive is prepared in accordance with the instructions, applied to a sheet of expanded polystyrene in an even layer using a notched trowel, then the sheet is glued with pressure to the wall. They start from the floor itself, while glue is also applied to the floor and other adjacent structures so that there are no gaps left with the insulation.

Sealant is applied to the seams between the insulation sheets. The ligation of seams in rows is observed. In a freezing corner, you don’t have to re-bandage the seams, but it’s better to apply the insulation of one wall to the insulation of another end-to-end with polyurethane glue - this will result in a thicker layer at the corner.

Fastening with dowels, with internal insulation- unacceptable action. The continuity of the insulation-vapor barrier cannot be violated. All cracks are sealed with particles of polystyrene foam itself and polyurethane glue. Polyurethane foam not allowed, as it is saturated with water.

Finishing for internal thermal insulation

The next stage is finishing the insulation. Purchase fiberglass plaster mesh with a density of 160 g per square meter. and higher, cell no more than 5 mm, alkali-resistant (ask for reinforcement of insulation). Then the glue is applied to insulation with a thickness of 3 mm, and the mesh is embedded into it in strips. It enhances all corners. On slopes, special corners with an attached mesh are used. The mesh is smoothed with a layer of glue.


Apply any plaster finishing. But it is better to stick plasterboard sheets with a thickness of 20 mm or more. Expanded polystyrene indoors must be hidden behind a fire barrier with a flame resistance of at least 30 minutes.

Also, the polystyrene foam should not come into contact with wiring or hot piping. These systems will have to be protected at the stage of gluing the insulation with barriers made of mineral wool with a thickness of at least 50 mm, closed on the side of the room with a vapor barrier on the sealant.

IN general work and there will be quite a lot of costs. Insulation from the inside of a corner apartment cannot be called simple. But, despite everything, the cold walls will be hidden behind a durable warm layer. In the corner apartment it will become “an order of magnitude” warmer in winter... But all that remains is to think again about the correctness of the external insulation...

In end apartments, wall insulation is an integral part of living. With the arrival of cold weather, the level of heat loss increases. How more walls in a corner apartment, the faster the temperature drops inside. IN brick house this can be fixed internal lining, insulation and processing of corner joints.

Features of corner walls

Brick houses have always had warmer walls than panel houses. Butt laying, no interpanel seams, material that retains heat. But if the wall is corner, then temperature changes have a detrimental effect on corner room due to poor waterproofing and movement of the dew point outward. For these reasons, with inside brick house Condensation begins to form, which leads to:

• constant humidity and dampness;
• the appearance of fungus or mold;
• water running down the walls;
• wallpaper lag;
• impossibility of maintaining heat in the apartment.

Methods for insulating apartments

Before installing walls, you need to change wooden windows for metal-plastic ones, preferably three-chamber ones, they will act as a vacuum. If this is not possible, then you can treat the window joints with silicone and install rubber seals in places of contact. Carry out the same work with the balcony. Of the most practical options Insulation of a corner apartment is usually distinguished as follows:

Polyurethane foam can be used to complete the work.

• Mineral wool- thanks to its plasticity, it is easy to install, convenient to process, made of fire-resistant material, non-toxic. The disadvantages include the fact that it allows moisture to pass through, is quite heavy and can be deformed.
• Expanded polystyrene is able to withstand temperature changes and retains its properties for up to 35 years. But at the same time flammable.
• Polyurethane foam - has excellent noise-insulating properties, is non-flammable, and durable. Requires high costs; operation requires the help of specialists and additional equipment.
• Plaster acts as a barrier to heat transfer.
• Thermal paint can eliminate cold bridges and maintain an optimal microclimate in a corner apartment.

Always use a level when leveling surfaces. You can also do " warm walls"By analogy with a 'warm floor'. In this case, electric insulation is installed in the walls, this will warm them up enough that the formation of condensation will drop to zero. It is customary to distinguish two main methods of insulation:

• Interior.
• External.

To insulate a wall you need to create high-quality ventilation and a vapor barrier, this will prevent condensation.

How to insulate a corner wall of a brick house from the inside?

Cotton wool should be placed between frame rivers.

At the beginning of the work, the surface is cleaned and a primer with antifungal properties is applied on top. When insulating with mineral wool, a frame is built from wooden slats, between which pieces of cotton wool are placed on glue. Glue is applied to the wall. The seams are covered and rubbed, drywall, primer and paint or wallpaper are applied. When working with expanded polystyrene, glue is applied to the sheet with a spatula and glued.

There should be no gaps; the seams are covered with sealant. Finishing is done plaster mesh made of fiberglass, which is smoothed with a layer of glue, and drywall is attached to it. When plastering, the material is applied in three layers, and after each it dries, then it is primed and leveled. The wall is painted or pasted over. To insulate a corner room with thermal paint, the base is prepared and the paint is applied with a brush or roller. After drying, you can wallpaper the walls.

External insulation

At external cladding surfaces used: mineral wool, polystyrene foam and polyurethane foam. Mineral wool is seated on glue and secured with anchors. The seams are rubbed and leveled with sealed materials. A reinforcing mesh is placed on top, and a layer is applied on top of it facade paint. The technology of polystyrene foam insulation begins with installation metal frame. The walls are treated with a special solution and polystyrene foam boards are placed on the glue. The corners are rubbed down, a layer of plaster and paint are applied. When insulating with polyurethane foam, it is installed metal grid. The material is applied using a sprayer. On top you need to apply a layer of glue and reinforcing mesh, and then plaster and paint with facade paints.