5 options for insulating the garage from the inside

8 min

Our climate is different in that for 4-6 months a low temperature reigns, which is not only not very comfortable for humans, but also harmful to cars, our faithful assistants in the matter of movement. Frost and precipitation in winter can harm a car quite badly, and many try to leave the car in the garage as often as possible, thereby protecting it from negative effects. But if the garage is not insulated, then even there the “iron horse” will not be completely protected from the external environment, because thin walls almost do not prevent the penetration of cold masses into the interior of the room. In order for the car to remain safe in any weather, you need to take care of the insulation of the garage for it in advance.

insulation of the garage from the insideIt should be noted right away that it is also unnecessary to overdo it with insulation and create room temperature in the garage, unless, of course, you plan not to go outside during the winter. Otherwise, a strong temperature contrast can have an extremely negative effect on the car body, causing the onset of corrosion. Also, do not forget about ventilation so that excess moisture goes out into the street along with harmful gases.

The requirements for the thermal insulation of the garage are not as strict as for the insulation of residential premises. And if for the latter, insulation from the inside is extremely undesirable, then in the case of a garage it is no less effective and often becomes the only possible option. So, if the structure is located close to others, then it will not work to insulate it from the outside. Moreover, some types of garages require double insulation, such as metal ones. The only drawback of insulation from the inside is that the area can be reduced, but in order to nullify such a “side effect”, you need to select a heat insulator that will cope with its task at a minimum thickness. So, what materials are suitable for insulating a garage from the inside?

# 1. Styrofoam

insulation of the garage from the inside foam 2Polyfoam is the most popular option in this sense, all work with it can be easily done independently, which is why it has enjoyed such success for several decades in a row. There are a lot of advantages of this material.

  • Firstly, it is lightweight and is not able to deform the walls of the garage, does not require the creation of an additional frame, and slabs of material can be glued to the walls or mounted with dowels.

  • insulation of the garage from the inside foamSecondly, working with such a heater is very simple, because it is easily cut with a knife, it can be of any thickness and size, which allows you to choose the ideal option for any climatic conditions. Moreover, the foam is not afraid of mold, mildew, moisture and rodents, so you can be sure of its integrity and hygiene, and additional insulation with films is also not needed.

If we add durability and low cost to all this, then we get an ideal material for insulation at all. True, it was not without its drawbacks: foam is a combustible material, so it is better to choose those products that are impregnated with a fire retardant. Yes, and under the influence of sunlight, the foam is gradually able to turn yellow, but inside the garage a layer of such insulation will last a long time.

insulation of the garage from the inside styrofoam 3Styrofoam can be of several types, but expanded polystyrene is the most popular for insulating garages. Depending on the specifics of production, it can be pressed, non-pressed or extruded. Taking into account the ability of this material to burn, it is better to stop your choice on a material of the PSB-S type, which includes a fire retardant. Expanded polystyrene has good heat and sound insulation, it is easy to process, not susceptible to fungal infection. There is a myth that it is harmful to health, as it supposedly contains residual styrene. There is some truth in this statement, but in order to protect yourself, it is better to buy material from trusted manufacturers who follow the manufacturing technology and supply safe products. Also pay attention to the fact that decent results in insulation can be achieved if the insulation is mounted not only on the walls, but also on the gate and ceiling.

insulation of the garage from the inside penoizolThe second material in this group is penoizol, which is often called liquid foam. It is made in the same place where it will be used, and the resulting foam quickly hardens, filling all the cracks. This is one of the most reliable methods of insulation, which will create an excellent barrier to cold, because the thermal conductivity of this substance is quite low. Moreover, the material is durable, and manufacturers declare that it will serve faithfully for at least 40 years, although scientists call the figure 100 years or more. The material does not support combustion, but this method of thermal insulation cannot be called the most budgetary, since you will need special equipment and, as a rule, the help of professionals. And the presence on the market of dishonest manufacturers offering not the highest quality products scares off many.

insulation of the garage from the inside with polyurethane foamAnother liquid insulation – polyurethane foam, which is applied to the walls in the form of foam, gradually solidifies, forming a monolithic layer of thermal insulation. It does not make the walls of the garage heavier, since it mostly consists of air, adheres well to any surfaces, and does not take away the useful area of ​​the garage. The material does not support combustion, but it can smolder if exposed to very high temperatures. The only drawback is the need for special equipment and specialists for quality work.

# 2. Mineral wool

insulation of the garage from the inside with mineral woolMineral wool is a good insulation that boasts a low coefficient of thermal conductivity, breathability, health safety, and also non-flammability. Basalt wool, which is commonly called mineral wool, has excellent sound absorption performance. For internal insulation, mats with a density of not more than 180 kg / m3 are used.

There are also drawbacks to this kind of insulation. So, mineral wool is very afraid of moisture, so it must be protected with a layer of vapor barrier. Otherwise, moisture collected from the environment will cause a loss of thermal insulation properties. The cost of mineral wool is slightly more than that of foam, but still quite affordable. True, this method of insulation is suitable for those who have a sufficiently spacious garage, because for mineral wool it is necessary to build a frame, in the cells of which the insulation itself is mounted with a thick layer (10 cm or more).

insulation of the garage from the inside with mineral wool 2Separately, it is worth noting glass wool insulation – this is one of the varieties of mineral wool. Since it is made from molten glass waste or rocks saturated with silicon, needle-like particles are present in the structure, which represent the main danger during operation. When insulating a garage with such material, all personal safety requirements should be strictly observed so that particles of the material do not get into the skin, eyes or respiratory system. Glass wool is very afraid of water, and if it gets a little wet during installation, then the material can simply be thrown away, since all the thermal insulation properties are already lost anyway. And although the price for it is much lower than for stone wool, it is not very popular among those who want to insulate the garage from the inside, since its installation is complicated.

No. 3. “Warm” plaster

insulation of the garage from the inside with warm plasterWarm plaster is a relatively new type of insulation, which looks like ordinary plaster, but instead of sand, it contains materials with low thermal conductivity: vermiculite, expanded polystyrene, sawdust, expanded clay, pumice, etc. Plaster with expanded polystyrene granules has become the most popular, since it has universal properties, can be used both inside and outside, and has the best thermal insulation performance. Sawdust-based plasters are also common, which also contain components such as paper, clay and sand. This composition is just suitable for internal insulation, but you should be prepared for the fact that such a plaster dries for a long time, and good ventilation will be needed to speed up the process. Vermiculite-based compounds can also be used to insulate the garage from the inside.

insulation of the garage from the inside warm plaster 2This option has many advantages. So, the walls may not be leveled in advance and not prepared in any way, “warm” plaster has excellent adhesion to wood, metal and stone, it does not require the use of reinforcing meshes (except for some difficult cases). In addition, it is very simple and easy to apply and you can do without outside help, managing it as soon as possible. But with all this, the material is clearly inferior to traditional insulation materials, and it is better to use it in combination with other heat-insulating materials. It is not an option to apply a thick layer, since if it is more than 5 cm thick, there is a risk that the plaster will begin to crack and flake off under its own weight.

No. 4. Heat insulating paint

insulation of the garage from the inside thermal insulation paintAnother modern material that amazes not only with its ease of use, but also with its effectiveness. Here are just a few striking examples: a layer of paint equal to 1 mm is equivalent to a layer of 50 mm mineral wool, and a layer of paint applied according to the instructions is like a wall of 1.5 bricks. The unique properties of this insulation are based on the features of the structure and the principle of operation. All insulation materials we know work on the principle of a barrier, preventing heat from leaving the space. Heat-insulating paint becomes not only a barrier to the penetration of infrared rays outside, but also their reflector, as a result of which it is much more difficult for heat to leave the confines of such a room. A similar effect was made possible due to the presence of a vacuum inside, which prevents the passage of infrared rays.

The advantages of insulating paints can be enumerated for a long time. They have excellent adhesion to most building materials, have good thermal insulation performance, are not afraid of moisture, are vapor permeable, and protect metal from corrosion. A layer of such insulation has a very low weight, therefore it does not make the structure heavier, and the application process itself is as simple as possible and does not differ much from the use of conventional paints. The list of advantages is complemented by resistance to ultraviolet radiation, ease of restoration of damaged coating, resistance to high temperatures (paint does not burn, but only charred at 2600C or unfolds at 8000C), environmental friendliness. But one cannot note such a minus as the rather high cost of paint, its high consumption, and not always it can be used as an independent insulation, but nevertheless, this option is used more and more often to insulate a garage.

No. 5. Reflective insulation

Reflective insulation is the newest insulation, which is called today one of the most effective. Moreover, it is optimally suited for insulating the garage from the inside, as it has a small thickness, which means it does not take up a lot of usable area. The material itself consists of a layer of heat insulator covered with a metallized film, and that is why this type of thermal insulation is called foil.

insulation of the garage from the inside reflective insulationDifferent materials can be used as an insulating layer: polyethylene foam, expanded polystyrene, mineral wool or basalt insulation. For internal thermal insulation of a garage, polyethylene foam and mineral wool are optimal as the main layer, and the insulation itself can be in the form of plates or rolls. The main layer can have a thickness of 2-50 mm, and on top of it aluminum foil is applied in a very thin layer by heat welding. A metallized film made of polypropylene can also be used, it is possible that there is an additional layer of fiberglass. The foil layer can be either one-sided or double-sided.

How does this type of thermal insulation work and why is it considered so effective? So, the foil reflects the main part of the heat waves, preventing them from leaving the room. Those infrared rays that did pass through the foil are already held by a layer of insulation, reducing heat loss to a minimum. As a result, we get a material with a low coefficient of thermal conductivity, good sound insulation, low weight, fire resistance and resistance to moisture. Plus, it’s environmentally friendly and easy to fit. The disadvantages, due to the short duration of the use of the material, are not yet known, but such insulation lends itself to corrosion.

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Passionate about DIY for over 10 years and all the new tools, I give you through this blog all my advice, tips, tests in all areas: carpentry, electricity, masonry, gardening, home automation ...


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