Insulation of the garage roof from the outside and from the inside

As a rule, a garage is built in order to protect the car from atmospheric influences: precipitation and temperature extremes. Therefore, the car in the garage must be protected from cold and moisture, and this can be achieved in only two ways: artificial heating of the room or its high-quality insulation.

As you know, about 60% of the heat leaves the room through the roof, because the heated air, according to the laws of physics, rises up. Therefore, the first thing a car owner and garage owner should do is insulate the garage roof.

External insulation

When insulating the garage roof from the outside, it is important to decide on the thermal insulation material. The most profitable and practical, from the point of view of its placement, is a layer of wood chips or mineral wool. Sawdust is a cheap type of thermal insulation, and mineral wool is convenient for placing on the floor surface, as it is produced in mats. Despite the fact that sawdust has an affordable price, it has its drawback. The wood-based heat-insulating layer supports the spread of the fire if a fire breaks out. For this reason, this choice is not permissible for premises that are subject to increased requirements from the fire service.

Whichever material option is chosen, external insulation is carried out in the following sequence:

Laying a vapor barrier

• Laying of a vapor barrier for the escape of moist air. A suitable micropore film is used as a vapor barrier. Forgetting to cover the ceiling with a vapor barrier film, the owner of the garage risks getting abundant condensation of humid air inside the autobox space. The film is rolled out so that there is an overlap of 50-70 mm between adjacent canvases.

Insulating layer overlay

• Imposition of an insulating layer. If mineral mats are laid, there should be no inter-end gaps. When using sawdust, it is important to maintain a certain layer thickness. If sawdust thermal insulation is chosen, then its layer should correspond to 80-100 mm. Spread and level the insulation in an even layer, observing the required thickness.

Laying waterproofing film

• Laying a waterproofing film. The layer is necessary to prevent accidental soaking of the thermal insulation. A polyethylene film is used to protect the insulating layer. The tightness of the imposed waterproofing is achieved by overlap between pieces of polyethylene film, and fixing with adhesive tape.

Thermal insulation laying scheme

After observing all the technical operations for insulating the autobox, the main roof is laid in the form of profiled sheets, slate, etc.

How to insulate a roof in a garage

Before you jump out of place and start spontaneously insulating your garage, it is worth studying the structural features and the specifics of operation.

First, decide on the heating mode of the garage:

Heated constantly.
It is heated periodically (only in extreme frosts).
Not heated at all.

Having determined the approximate temperature range in which the insulation will work, pay attention to the humidity of the room. It should be borne in mind that, in addition to the usual steam, vapors of fuels and lubricants, as well as diesel fuel, gasoline and other flammable liquids, will be generated without fail.

In view of the above, the most suitable materials for insulating a garage are:

Polyfoam and other polymer insulation.
Fiberglass.
Mineral wool.

Polyfoam is a modern building material. It is widely used in thermal insulation of buildings. Its operational features allow it to be used both in internal works and in external ones. Due to its wide range of applications, foam is in constant demand in all construction companies.

Fiberglass is a filament derived from glass waste. Unlike glass, it can bend in any direction without breaking. Has elasticity, does not burn. Able to work over a wide temperature range.

Mineral wool, in addition to thermal insulation, has a soundproofing effect. However, its use in humid rooms without adequate protection is impractical.

Warming by means of isover

Isover

Choosing between the external and internal insulation of the autobox, many owners prefer the second option, since it is easier to insulate the garage roof from the inside. This is due to the fact that there is no need to disassemble the roof, especially when the isover is used. The material has a number of beneficial advantages:

Low thermal conductivity. It is a real barrier between the heated garage space and the cold ambient air in winter.
Minimum specific gravity. Insulation does not have powerful mechanical effects on the overlap of the building. The property is relevant for garages with plank ceilings with a high degree of wear.
Simplicity of styling. Thermal insulation material is produced in rolls, so you can cover the required area without unnecessary effort and loss of time.

To accommodate the isover layer, a special frame is required, through which the heat-insulating material is covered with decorative trim. For the frame, special galvanized sheet metal profiles and corresponding perforated hangers are used.

Fiberglass

Glass wool

Fiberglass is made from glass waste. After production, they are straightened, stretched into long fibers of small thickness, then collected and pressed into slabs. Advantages of fiberglass insulation:

low thermal conductivity (at the level of glass thermal conductivity and even better);
not susceptible to inflammation and decay;
absolute immunity to mold and fungal growth;
high resistance to external environmental conditions;
inaccessibility to rodents.

Note! As a disadvantage, it should be noted its increased fragility and an adverse effect on the skin. Therefore, precautions must be taken when laying. Installation must be done with heavy gloves.

Foam ceiling

Styrofoam

Choosing affordable insulation for a garage, many garage owners prefer to use polystyrene foam. Insulating material is polystyrene foam plates.

Advantageous distinctive properties of expanded polystyrene:

Light weight. The property is important not only during delivery, transportation, unloading, but also during the direct process of insulation.
By choosing the optimal thickness of the slabs, you can ensure good insulation of the ceiling from the inside. The material has a low heat transfer coefficient.
Even an inexperienced novice installer is easy to lay down polystyrene foam boards.

To fix the foam layer of thermal insulation, specially designed dowel-nails with a disc head are used. For one expanded polystyrene plate with an area of 0.8 sq. meter, two fasteners are enough. Plates are arranged on the surface of the ceiling end-to-end. For each fastener, by means of a perforator, holes with a diameter of 6 mm are made, corresponding to the diameter of the dish-shaped dowel-nail.

An alternative option for fixing polystyrene foam boards is to use polyurethane foam.The fixing agent is applied to the insulating material by the point method (4-5 "points" of glue are enough for one sheet of 0.8 square meters). After applying the foam, the foam settles on the floor surface, and is lightly pressed. The fastening method is simple and cheap, since there is no need to use a hammer drill and buy dish-shaped dowel nails. To exclude mini gaps between adjacent plates of expanded polystyrene insulation, it is practical to use the same polyurethane foam.

Insulation of an unheated metal garage

Periodic freezing and thawing of the car leads to rapid wear of the iron parts of the car. To prevent this, content in warmer and dryness. In winter, the most acceptable conditions for keeping the car is the temperature plus 5 or higher.

However, in a metal garage, it is almost impossible to achieve this without using a heater.

That is why such a house for a garage is a must. insulate... If you do not carry out insulation, then in winter the temperature inside the garage will be about minus 20.

Leaving the garage, you will have to warm up the engine for at least 5 minutes.

The presence of insulation will also help protect the interior from excessive overheating in the summer heat.

Since this is also unpleasant, because the car overheats, and to be in it until ventilation is carried out, impossible.

So, insulate the garage is needed in such a way that in winter the temperature does not drop below 4-5 degrees, and in summer it does not rise above 25-28.

Important points

How to insulate an iron garage from the inside?

Material covers all surfaces garage including floor.
When laying roll or sheet materials, special attention should be paid joints... To prevent cold from penetrating into the cracks, you need to overlap the sheets and connect them with aluminum tape.
Pay particular attention to laying the material in corners and locations joints garage designs.
Particular attention should be paid to the gate. It would be ideal to build a small door in them so that the gate does not fully open every time.
Insulating material must be installed close to the metal parts of the garage, otherwise it will accumulate in the air spaces condensate... The resulting moisture will accelerate corrosive processes, and the structure will become unusable in a very short time. That is why it is recommended to cover wave iron garages liquid heaterscovering the metal tightly.

Tools and materials

For insulation iron garage with your own hands you need the following tool:

electric drill;
building level;
scissors for metal;
hacksaw;
screwdriver;
roulette;
stapler for wood.

For installation of insulation you will need the following materials:

wooden slats or metal profile;
staples;
self-tapping screws;
paint brushes or rollers.

Insulation with penoizol

The material is a urea foam mass. The type of insulation has firmly entered the practice of thermal insulation in many European countries, thanks to the following advantages and technical features:

The thermal insulation compound is applied directly to the floor surface under high pressure.
There is no need to purchase fixing fasteners (saving money).
A special utility warehouse for heat-insulating material is not needed.
Cleanliness of the working area. No debris remains after the foam layer is applied.

For thermal insulation by means of penoizol, it is necessary to first make an appropriate frame on the garage floor, and sheathe it with a finishing finishing material (lining, PVC panels, etc.).Only after that, penoizol is "blown out" into the cavity between the garage floor and the finish. The material gets into the smallest cracks in the ceiling, filling them, so the quality of the finished work is high.

Conducting the results

Asking the question "how to insulate the roof in the garage", you should adhere to the following tips:

It is advisable to carry out external insulation if a gable roof is supposed to be erected.
For floors with high operational wear, it is better to use foam plates.
To exclude the purchase of excess heat-insulating material, it is necessary to carry out preliminary measurements of the ceiling.

These simple tips will help you perform roof insulation efficiently and quickly.

Polymer materials

Expanded polystyrene

Such materials have recently been in high demand. There are several types of polymer insulation, but almost all of them are manufactured using the same technology. The most common polymeric insulation materials are polystyrene foam and polystyrene foam. Their advantages are:

waterproofness;
convenience during installation work;
the material can be fixed with glue or using a dowel;
ease of processing, it is simply cut with a sharp knife;
light weight, which is very important when insulating the roof.

Note! Very rarely at present, heaters are used based on natural heat-insulating materials: felt, cotton wool and cotton products.

Now you should set out a few tips for choosing a specific insulation. The garage is a place with a high fire hazard. Therefore, when choosing a material, you must immediately exclude quickly flammable heaters. Fibrous materials are better suited. But they require the presence of additional processing using foil or special film. One should not think that only one type of insulation is needed to insulate a roof.