One of the most important living conditions in an apartment is a good heat supply, for which either a centralized heating system or autonomous equipment installed by residents is responsible. However, the efficiency of heating directly depends on the correctly performed thermal insulation of the premises.
Consider how to insulate a wall in an apartment in order to increase air temperature and at the same time reduce energy consumption for heating. For this, we give two detailed instructions on thermal insulation with popular types of insulation, in which each step is illustrated with photographs.
Also in this material we will consider less popular methods that can be used to insulate walls from the inside.
When is it necessary to warm the apartment?
An advantageous method of warming the walls of apartments and houses is still external thermal insulation, which does not affect the dew point shift and heats the entire wall.
If the insulation layer is mounted on the inside, the wall freezes to the full thickness, and the dew point moves closer to the living room.
A negative consequence of internal insulation is the loss of condensate, which over time destroys insulating and decorative materials, dramatically reduces the efficiency of thermal insulation and provokes the appearance of mold
However, the external method is not always suitable. There are difficulties with the installation of insulation on panel high-rises, as well as on walls adjacent to technical spaces, for example, an elevator shaft. If the building is a historical object, the appearance of the facade cannot be changed.
However, in some cases, you just can not do without thermal insulation:
Image Gallery
Photo from
Corner apartment with a large coefficient of heat loss
Mold on walls and corners
Insufficient basic insulation of premises
Ground or ground floor apartment
Without wall insulation, the efficiency of heating devices is reduced. Frozen walls, cold bridges, dampness create unsanitary conditions and become the root cause of diseases.
However, you can protect yourself from cold and illness by warming one or more walls in the apartment from the inside using one of the methods listed below.
Best Ways and Detailed Instructions
The technologies that builders use to insulate walls depend on several factors: installation conditions, the necessary degree of protection, and the choice of material. The best options are recognized combinations of modern thermal insulation materials and decorative finishes with an additional function of insulation.
Option # 1 - EPSP on the crate + drywall
Extruded polystyrene foam (EPS) is considered one of the most effective insulation if it is necessary to carry out the process of thermal insulation of a room or an entire apartment from the inside.
It is sold in the form of rigid boards, consisting of several components: polystyrene granules, a gas mixture and a blowing agent.
The main advantages of extruded polystyrene foam:
- small thickness of the plates, allowing you to save the usable area of the premises;
- minimum water absorption;
- resistance to temperature extremes;
- light weight;
- simple processing.
This is a material that can be purchased and cut into fragments convenient for installation. But there is also a minus - low vapor permeability. In an apartment with thermal insulation, it is necessary to equip good ventilation.
Read more about the pros and cons of extruded polystyrene foam here.
The density of EPSS is 1.5-2 times higher than that of the foam, and the thermal conductivity is lower, and after 10 years of use, the heat-insulating qualities of the material are preserved
As a heat-insulating material, we take EPPS with a thickness of 50 mm, and for the construction of the frame (crate) - a wooden beam of 50 * 50 mm and 50 * 30 mm with markings for holes. As fasteners we use dowels in plastic and self-tapping screws. You will also need a vapor barrier membrane, adhesive tape for vapor barrier.
Minimum Toolkit:
- marker and ruler for marking;
- a special hacksaw for cutting EPS plates into pieces of the required size;
- drill with drills for dowels;
- construction stapler.
The hacksaw for a heater is ground so that when cutting material it does not dust. It is also suitable for mineral wool, glass wool, ordinary polystyrene foam.
Thermal insulation instructions:
Image Gallery
Photo from
Step 1 - marking the wall for installation
Step 2 - drilling holes in the bars
Step 3 - perforating the wall with a drill
Step 4 - fastening the bars with dowels
Step 5 - cutting the slabs to size
Step 6 - installation of EPS in the crate
Step 7 - fixing the vapor barrier membrane
Step 8 - tape gluing
If you neglect the installation of a vapor barrier, the thermal insulation materials will get wet from the condensate that will appear in any case.
As a result, mold will appear, and the effect of thermal insulation will noticeably decrease. If you find mold on the walls of your home, we recommend that you familiarize yourself with the best antiseptics against it.
Image Gallery
Photo from
Step 9 - preparing materials for the counter battens
Step 10 - installation of wooden blocks
Step 11 - preparation and cutting of gypsum plasterboard
Step 12 - Install Drywall Sheets
A wall lined with drywall is ready for finishing: puttying, painting or wallpapering.
Instead of conventional plates of extruded polystyrene foam with a glossy surface, an alternative material is increasingly being used - EPS with a rough top layer and grooves that increase the degree of adhesion.
For the installation of such plates, the crate is not required, they are put on glue, connecting with each other, and then the result is fixed with dish-shaped dowels
The fixed plates are treated with a base reinforcing compound, and then paint is applied in 2-3 layers or wallpaper is glued. A “fur coat” made of EPSP is able to raise the room temperature by 4-5 °, which will certainly affect the saving of resources for heating.
Option # 2 - ISOVER mineral wool + OSB boards
The second technology solution is similar to the first, although completely different materials are used for installation. The thermal insulation layer will consist of mineral wool, and OSB boards will form the basis for the finish.
ISOVER boards are used for heat and sound insulation of rooms with brick or concrete walls. They are made of quartz-based mineral wool.
ISOVER products are certified, approved for use even in children's and medical institutions. It has a thermal conductivity of 0.038 W / (m · K) and a flammability group of NG - both indicators for GOST R 31924 and 30244-94.
Advantages of mineral wool:
- it retains heat well, has a low coefficient of thermal conductivity;
- environmentally and fireproof;
- it is produced by plates, convenient for installation;
- eliminates the accumulation of moisture;
- light weight.
But there are also disadvantages: some types of mineral wool in the composition have components that emit phenol, and manipulations with the material necessarily require compliance with TB - the presence of protective clothing and a mask (glasses).
Oriented particle boards (OSB) are laid on top of mineral wool on a crate of wooden blocks or metal rails. This is a material made from wood chips, resins and polymer adhesive.
The density of the plates is 640-700 g / m², the swelling coefficient is from 10 to 22%. They can be glued with other materials, coated with paint or varnish
Due to the wood composition, the panels are fire hazard (class G4), therefore, before or after installation, they are covered with protective flame retardants - flame retardants.
Assembly instruction:
Image Gallery
Photo from
First you need to prepare the walls, brushes to remove excess debris and dust, and then make sure that they are straight. To do this, use the level
In addition to mineral wool, you need wooden bars 50 * 40, screws 90 mm, plastic dowels. The bars need to be processed - sanded and adjusted in length
According to the level, first in the bars, and then in the wall we drill holes with an interval of 0.4 m from each other. Then we fix the first block on the wall with screws with dowels
At the same distance from each other, depending on the width of the mineral wool slabs, we fix all the battens
Pieces of mineral wool should be 2-4 cm wider than the opening intended for them, then they will be held tightly by surprise without the use of additional fasteners
Mineral and any other type of cotton wool should be covered with a vapor barrier on top, which protects the material from moisture and retains its properties.
The counter-crate is also assembled from a wooden beam, but already with a section of 40 * 20 or 50 * 20 mm. Reiki fasten directly on the bars fixed on a wall with self-tapping screws
The last mounted OSB boards. Sheathing is done with wood screws 35 mm long. Installed slabs - the basis for the finish coating
Step 1 - preparing the walls for installation
Step 2 - purchase and preparation of material
Step 3 - installation of the first beam
Step 4 - creating a wooden crate
Step 6 - fixing the vapor barrier film
Step 7 - Installing the Counter Lathing
If the walls are even and the material is prepared in advance, it is possible to insulate a room of 20 m² in 5-6 hours, working alone.
But this is facilitated by ISOVER products: mineral wool is easy to cut and stack, and vapor barrier sheets do not even require building tape for gluing, since they are initially equipped with an integrated mounting tape.
A prerequisite for basalt wool insulation is the installation of forced ventilation. The device is mounted in the air duct, and the intake of fresh air provides regular manual ventilation or special valves on the windows.
If a partition is planned to be built in the insulated room, then it can also be done with mineral wool, but it is better to replace OSB boards with sheets of drywall.
Izover is placed between two walls of LGK, and each wall is made of 2 layers of drywall. Such a partition will protect against cold and noise no worse than a full-fledged reinforced concrete wall.
Both of the presented methods have disadvantages that must be considered when planning work.
Firstly, they select part of the usable area and reduce the space of the living quarters along the perimeter, secondly, they require significant investments in the family budget, and thirdly, when applying them, all the nuances of the technology must be observed.
A brief overview of other ways
Other technologies are also used, among which are found both obsolete, but cheaper, and modern, requiring considerable investments.
Installation of expanded polystyrene or polystyrene
With the advent of EPSS, the use of conventional stress-free polystyrene foam (PSB) has become impractical, since it has degraded performance.
Namely:
- burns and meltsby releasing hazardous substances;
- fragiledue to which the pieces break under mechanical pressure;
- not protected from rodents.
In terms of parameters, it is inferior to extruded polystyrene foam, and this can be seen in the table of physical and technical properties of expanded polystyrene plates:
For example, the compressive strength of EPPS is 0.25-0.50 MPa, while that of PSB is only 0.05 to 0.1 MPa (at 10% linear deformation), the water absorption of EPSP is 0.2% of the volume, and for PSB - as much as 2.0
However, light and thick plates are still used when it is necessary to quickly and inexpensively warm the room. We recommend using this material for facing garages and utility rooms, that is, non-residential premises.
Liquid-ceramic insulation spraying
To provide a “cold” wall with additional thermal insulation, substances are also applied that are applied according to the principle of painting, that is, using a special spray gun, spray gun or brush. We talked more about the methods of warming the cold walls of an apartment in this article.
Schematic representation of the composition of the liquid-ceramic mixture: vacuum microspheres of various diameters and a binder latex mixture enriched with antifungal and anticorrosive additives
Advantages of liquid ceramic spraying:
- moisture resistance;
- mechanical stability;
- elasticity;
- ease of application;
- environmental friendliness;
- minimum load on the structure.
The main advantage is the thinness of the applied layer while maintaining important thermal insulation characteristics.
In terms of efficiency, a 1-mm layer of ZhKN is equal to a slab of basalt wool 50 mm thick and is able to increase the temperature in the room by 3-4 degrees. Builders love spray for their ease and high speed of application.
After applying the liquid-ceramic mixture, additional waterproofing and vapor barrier are not needed. A thin layer withstands temperatures from -60 ° C to +250 ° C, and serves, subject to application technology, up to 30 years.
Cork and polystyrene wallpapers
Of course, sticking with one layer cannot be compared with a full-fledged heat-holding “cake”, however wallpapers are actively used both in corner apartments and on the ground floor rooms.
Polystyrene foam wallpaper resembles ordinary non-woven, have a thickness of 0.3-1.0 mm, are sold in 10-meter rolls, are glued on the same principle - butt. However, special glue is intended for them.
The cork is eco-friendly, lightweight, easy to handle, and it is also a finishing decorative coating. However, her insulating properties are minimal.
In terms of efficiency, 6-millimeter PPP wallpaper replaces a brick wall with a masonry in half a brick, resists the formation of fungus and mold, and performs an additional noise-insulating function
Disadvantages of the material: like PPP boards, wallpaper shifts the dew point closer to the living room and refers to a combustible finish, like paper wallpaper.
In addition to these materials, eco-friendly and glass wool, wood chipboards, arbolite, foamed polyvinyl chloride and polyethylene insulation, fiberboard, honeycomb panels, reflective thermal insulation with a foil layer are used — materials such as Penofol or Armofol.
Each of the listed heaters has the right to life and, under suitable conditions, perfectly performs its functions. In more detail, all the popular types of insulation that can be used for walls of the house from the inside, their pros and cons and characteristics, we examined in another of our article.
When choosing a material, you need to focus on technical properties, cost and complexity of installation - sometimes the installation technique for untrained fans is difficult.
Recommendations on the choice of insulation:
Expert advice on choosing the appropriate type of insulation:
The method for an uninsulated house or apartment:
When choosing a thermal insulation technology, it is important to consider the installation conditions. For example, installation on a crate is not suitable for small rooms, since it steals a part of valuable space, but for large rooms this is an ideal option, the most effective of all available.
A great advantage of all the above methods of insulation - they can be done independently, and some even without special preparation.
Choose the best way of insulation for the walls of your apartment and you have any questions? Ask them below under this article - our experts and other site visitors will try to help you.
If you have already managed to insulate the walls of the apartment, please share your experience with beginners. Tell us what material you preferred and whether the result matches your expectations.