How to insulate the roof in a brick garage from the inside. The better to insulate the roof of the garage with your own hands. Roof structures of the garage

As a rule, a garage is built in order to protect the car from atmospheric influences: precipitation and temperature changes. 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. Therefore, the first thing that the owner of the car and the owner of the garage should do is to insulate the garage roof.

Requirements for insulation material

The garage is a specific room, the usual methods of insulation that would suit a residential building or a summer kitchen are inappropriate here. It is known that the worst enemy of the car - corrosion. And it occurs due to condensate, which, in turn, appears due to the temperature difference between inside and outside.

There is only one way to deal with condensation - drying wet drops with warm air. If it is not possible to heat the garage, it must be properly insulated. Material for these purposes should:

be non-combustible, because at the slightest spark you can lose not only the garage itself, but also the car stored in it;
do not absorb vapors of auto chemicals, oils and gasoline, so as not to become a source of toxins and volatile poisons over time;
have a non-porous structure so as not to accumulate moisture;
have a small mass so as not to weigh down the roof of the garage and the whole building as a whole;
have a long service life;
not attract rodents and insects;
not be affected by fungus and mold.

Important! The insulation material for the garage, first of all, must have all the qualities of an insulating layer. After all, he will have to “work” both in winter and in summer, maintaining the optimum temperature for the car inside the garage.

The best insulation materials for the roof of the garage

The modern range of building materials is so wide that there will definitely not be any problems with buying insulation for the garage roof. But the choice of a suitable insulation is a more complex and responsible issue.

The most common roof insulation materials include:

Each of these materials is often used to insulate the roofs of not only garages, but also residential buildings.

Attention! An insulated floor will be an excellent addition to an insulated roof - such a garage absolutely does not need heating, inside it will always be above zero temperature and relative dryness.

Garage roof insulation

Before you buy a heater, you need to find out what work to be done: external or internal. If the garage has already been built, moreover, the premises are being successfully operated, it is unlikely that someone will dismantle the roof in order to insulate it. In this case, internal insulation is applied.

When a garage is just being built or being designed, you should immediately think about roof insulation. These works are carried out at the stage of roof construction: after the installation of the rafters and before the installation of the roofing material. Such work is called external roof insulation, and they are performed more often, as they are more efficient.

Attention! Not a single layer of insulation will work properly if vapor barrier and waterproofing work has not been completed on the roof. These activities should be mandatory components in the process of insulating the roof of the garage.

How to insulate the roof of the garage from the inside

When the outer layer of the roof (roofing material) has already been laid, it can be insulated from the inside. To do this, dismantle the inner lining of the attic (boards, plywood, drywall), if any. The task of the master is to get to the rafters.

Now the following steps are performed:

A waterproofing film is installed between the rafters with a slight sag, which will prevent street moisture from getting into the insulation layer.
Rolled or slab insulation is laid between the rafters in a spacer and fixed with wooden planks or a counter-lattice. The joints between the insulation sheets are treated with sealant, mounting foam or special adhesive tape (depending on the insulation material).
A vapor barrier membrane is stretched on top and fastened with adhesive tape.
The attic is sewn up from the inside with decorative material (wood, MDF, drywall).

Important! The vapor barrier membrane works as a two-sided protection: it does not allow warm steam from the room to pass into the insulation layer, thereby protecting it from getting wet.

It is possible not to use vapor barrier only when the insulation absolutely does not absorb moisture (foam plastic, penoplex, penoizol).

How to insulate the roof of the garage from the outside

At the stage of building a garage, roof insulation will be much more efficient - such a design is more correct in terms of building codes.

When the rafters are laid, the roof cornice is made, you can proceed to the next step:

A vapor barrier membrane is laid between the rafters. Do this so that small sags form. The membrane is fixed with special brackets, preventing its gusts and gaps between adjacent strips.
The crate is stuffed with a step that corresponds to the width of the selected insulation material.
A heater is fixed between the laths of the crate.
The joints between the plates of insulating material are sealed by any of the methods.
From above, everything is closed with a dense waterproofing film. Its task is to prevent precipitation from penetrating into the under-roof space of the garage, not to wet the insulation layer.
Roofing material is mounted (slate, metal profile, tile or other), according to the instructions.

A warm garage is one of the main factors determining the sound "health" of a car. One cannot but agree with this, because the cause of the appearance of condensate is sudden changes in temperature. And condensate is the number one enemy of the anti-corrosion protection of metal and, of course, can cause significant damage to the car. But how to insulate the roof of the garage, what material will be “warmer”?

The roof is the main component in the protection system of any building from adverse weather events. Therefore, it is not enough just to insulate it, it needs constant prevention from leakage, dampness and more. How to properly insulate the roof of the garage so that it performs its functions in the best possible way. There is no need to "discover America", as for any type of structure there are already specially developed building codes and rules that indicate the optimal conditions for keeping cars.

Maximum efficiency at the lowest cost: how to properly insulate the garage roof

Having a warm garage, securely protected by a roof structure, is the dream of any motorist. You can bring it to life yourself, since making an insulated roof is quite simple, especially for those who already know how to insulate a pitched roof.

What thermal insulation material to choose: how to insulate the roof of the garage

Roof insulation in modern construction is carried out in combination, combining classic insulation with a reflective heat insulator that does not transmit infrared radiation.

However, such expenses when arranging a garage are unjustified, especially when it comes to a detached building. In this case, you can only get by with classic options, fiberglass, mineral wool, polystyrene, etc., which must necessarily be distinguished by high fire resistance. The garage room has an increased fire hazard, since the probability of an accidental spark, for example, from an exhaust pipe during repair work, is very high.

You can, of course, use traditional methods, for example, to insulate the roof with sawdust, but protection as effective as in the case will not work.

Mineral wool has excellent technical characteristics. It is used with the obligatory organization of vapor and waterproofing layers to protect the insulation from water. At the same time, a “breathing” gap must be maintained. Minvata is quite affordable.

glass wool even cheaper, but there is one thing - this material is included in the group of flammable materials. For a pitched roof, a special type of glass wool is produced, which is distinguished by the density of the structure. It is packaged in rolls with a width corresponding to the standard step of the rafter legs.

Styrofoam in terms of its thermal insulation properties it is not inferior to mineral wool, but it is waterproof. Lightweight material is easy to install, and also inexpensive. Although polystyrene is considered a combustible material, the PBS-S brand, thanks to the addition, is capable of self-extinguishing. Therefore, it is quite suitable for warming the garage. In addition, polystyrene is a bacteriologically resistant material - it is not subject to decay, it is not afraid of fungus and mold.

You can insulate the roof with foam, for example. Waterproof and fire-resistant, it solidifies when it fills a closed space. In this case, a seamless coating is formed, which, in terms of its technical characteristics, is no worse than the best classic insulation. Despite the fact that it is one and a half times cheaper than sheet foam, Penoizol can last up to 40 years without losing its properties.

External insulation: how to insulate the roof from the outside

If the roof of the garage is flat, then you should think carefully about how to insulate the concrete roof outside the structure. Styrofoam is often laid on reinforced concrete slabs and a cement-sand screed is arranged on top of it. According to the technology, preparatory work is first carried out:

clean the plates from dirt, dust and all kinds of influxes;
the joints between the plates and the junction with the walls are sealed with mounting foam or caulked with fiberglass.

As a heater, for example, foam with increased strength characteristics is used. Lay it in a run with an overlap in two layers. Styrofoam plates are fixed to each other with a construction film.

The next layer is waterproofing, for example, ordinary roofing material or roofing film, and a concrete screed is mounted on it with special additives made of reinforced fiber or reinforcement. The addition of special frost-resistant solutions to the concrete composition will protect the coating from cracking.

If the roof of the garage is pitched, then the scheme of its insulation changes.

First, a vapor barrier is laid on the inside of the rafters, which is fastened with building brackets or buttons, and the joints are glued with adhesive tape.

A prerequisite is the complete tightness of the vapor barrier layers.

Outside, between the rafters, mineral wool or fiberglass is laid at a distance of at least 150 mm. The edges of the thermal insulation and the vertical surface of the outer surface of the walls must match. Thermal insulation material is limited by boards of 150 mm, which are nailed between the rafters. Their top edges should be flush with the rafters. In this case, the insulation will be protected from all sides by wood.

In order to be able to provide complete thermal insulation, it is also useful to know how to insulate the garage roof eaves. It is performed using two long strips of plywood, through which the insulation is lowered to the edge of the eaves. The edges of the insulation boards, protruding from the facade and the end parts of the roof, can be closed with an edged board attached to the rafters.

Internal insulation of the under-roof space

High-quality roof insulation is provided by a three-layer “pie” laid out on the inside:

hydro barrier,
thermal insulation,
vapor barrier.

Sprayed thermal insulation with polyurethane foam gives excellent results. This is the fastest and most efficient technology, which is distinguished by increased moisture and fire resistance, durability. When applying polyurethane foam, all voids are firmly and hermetically filled. When using this technology, there is no need for additional vapor barrier. After spraying, the material can be immediately finished on the inside with any frame system.

The primary task after the construction of the garage is its insulation. Having made the car box warm, it means that you can repair the car in comfortable conditions, regardless of the time of year. Thinking about how to insulate the garage roof, professional masters recommend a number of available building materials, which we will consider in our article. In addition, it protects the room space from the possible formation of condensate during the cold months of the year, providing an optimal atmosphere for the car and eliminating the possible formation of corrosion on the body.

When insulating the roof of the garage from the outside, it is important to decide on the heat-insulating material. The most profitable and practical, in terms 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 placement on the floor surface, as it is available in mats. Despite the fact that sawdust has an affordable price, they have their drawbacks. The wood thermal insulation layer supports the spread of fire if a fire occurs. For this reason, this choice is not acceptable 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 layer that serves to leak moist air. As a vapor barrier, a suitable film with micropores is used. Forgetting to cover the ceiling with a vapor barrier film, the garage owner risks getting abundant condensation of moist air inside the autobox space. The film is rolled out in such a way that there is an overlap of 50-70 mm between adjacent sheets.

Applying an insulating layer. If mineral mats are laid, then no inter-end cracks should form. 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. Scatter and level the insulation in an even layer, observing the required thickness.

Laying waterproofing film. The layer is necessary to prevent accidental wetting of the thermal insulation. To protect the insulating layer, a polyethylene film is used. The tightness of the applied waterproofing is achieved by overlapping between pieces of polyethylene film, and fixing with adhesive tape.

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

Insulation of the garage floor from the inside

Quality depends not only on the qualification of execution, but also on the selected material. For this, the following materials are used:

Penoizol.

Warming with isover

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

Low thermal conductivity. This is a real barrier between the heated space of the garage and the cold ambient air in winter.
Minimum specific gravity. The insulation does not have powerful mechanical effects on the overlap of the building. The property is relevant for garages with a board ceiling with a high degree of wear.
Ease of installation. The heat-insulating material is produced in rolls, so you can cover the required area without undue effort and loss of time.

To accommodate the isover layer, it is required to make a special frame, through which the heat-insulating material is closed with a decorative finish. For the frame, special galvanized sheet metal profiles and corresponding perforated suspensions are used.

foam ceiling

Choosing affordable insulation for a garage, many garage owners prefer to use polystyrene foam. The insulation material is expanded polystyrene boards.

Favorable 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 plates, you can ensure good insulation of the ceiling from the inside. The material has a low heat transfer coefficient.
Laying polystyrene foam plates does not cause difficulties even for an inexperienced novice installer.

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

An alternative option for fixing polystyrene foam boards is the use of mounting 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 is placed on the surface of the ceiling and pressed lightly. The fastening method is simple and cheap, since there is no need to use a puncher and buy dish-shaped dowel-nails. To exclude mini gaps between adjacent plates of polystyrene foam insulation, it is practical to use the same mounting foam.

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

The heat-insulating mass is applied directly to the ceiling surface under high pressure.
No need to purchase fixing fasteners (financial savings).
A special utility warehouse for heat-insulating material is not needed.
Cleanliness of the work area. After applying a layer of foam, no debris remains.

For thermal insulation using 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, in the cavity between the garage floor and the finish, the penoizol is “blown in”. The material gets into the smallest cracks in the ceiling, filling them, so the quality of the finished work is high.

Carrying out 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 it is planned to erect a gable roof.
For floors with high operational wear, it is better to use foam boards.
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.

In most cases, the garage is a metal box with a flat roof or a concrete block structure that has a sloping, slate roof. Such garages are characterized by low cost and the same comfort conditions. In order to create a normal microclimate in this room, to save on heating it, if it is planned to install a boiler or stove there, thermal insulation of building envelopes and ceilings is carried out. How to insulate the ceiling in the garage? What materials are used in this case?

The feasibility of insulating the garage

Finishing with natural clapboard over insulation.

Why is it necessary to insulate the ceiling in the garage? As you know, warm air is lighter than cold air, and therefore the first one always tends to rise. Encountering an uninsulated roof on its way, it quickly transfers part of its thermal energy to the ceiling, and then to the environment. A layer of thermal insulation material on the ceiling or roof will reduce the intensity of heat transfer between the interior of the garage and the street. Also read: "Basic do-it-yourself garage heating methods".

On the other hand, the constancy of the microclimate in the garage preserves the details of the car. Sudden temperature changes lead to the formation of condensate on the metal structural elements of the car. The latter begin to corrode. Warming the roof of the garage from the inside or outside will allow you to maintain a constant temperature in the building. As a result, condensate does not fall out, machine parts retain their integrity.

We warm the garage with our own hands

How to insulate the ceiling in the garage? When choosing thermal insulation, you need to take into account the features of the building itself. This is an unheated or periodically heated room, so the insulation should not lose its technical characteristics over a wide temperature range. On the other hand, a heater with a minimum moisture absorption coefficient is bought, since there is always a possibility of condensation in the garage. The effect of chemically active substances is also taken into account. These are vapors of fuels and lubricants and gasoline.

They are able to accumulate in the inner lining of the building, increasing its flammability and changing its performance. That is why a heater with minimal vapor absorption is suitable here. Given all of the above factors, the insulation of the ceiling in the garage can be carried out with the following materials:

mineral wool;
fiberglass;
polymeric heaters - foam plastics, polyurethane foam, etc.

Materials based on mineral fibers can be used provided that a good vapor and hydrobarrier is provided.

Insulation of the roof of the garage from the inside can be done with fibrous materials. If the work is carried out from the side of the attic or roof, it is necessary to choose thermal insulation with sufficient flexural and compressive strength.

Thermal insulation of the ceiling inside the building

The height of the lag should be greater than the width of the mineral wool.

For interior work, glass wool is selected. It is made from glass waste. The thickness of the fibers lies in the range of 3-15 microns, when their length reaches 1 m, due to which the glass wool has elasticity. On sale you can find both rolled and slab material. The latter is more expensive than the former. However, working with plates is easier. In addition, they are characterized by sufficiently high flexural and compressive strength.

Specifications of glass wool:

density - from 11 to 25 kg / cu. m;
thermal conductivity - 0.029-0.041 W / (m * K);
combustibility - NG, G1;
vapor permeability - up to 0.6 mg / mh * Pa;
moisture absorption - up to 0.8 kg / sq. m.

The mats must fit tightly.

Fiberglass can be used in a wide temperature range (from -60°C to +250°C). Due to the low density, the insulation is quite light. This simplifies its installation. Also read: "Insulation with penofol: characteristics, application".

How to insulate the roof of the garage from the inside with fiberglass? The order of installation of materials:

crate;
hybrobarrier;
directly insulation;
vapor barrier;
the second tier of the crate;
finishing material.

There must be a ventilation gap between the hydrobarrier and the mineral wool.

Wood or metal is taken as the structural material for the crate. The first option is affordable, but the wood must be treated with an antiseptic. This will prevent damage to it. The second option is distinguished by durability and strength, but also a high price. Regardless of the material chosen, the height of the crate must be greater than the thickness of the fiberglass board. This is necessary to organize a ventilated gap.

The step of the crate should be equal to the width of the insulation board. Only in this way will it be possible to securely and reliably fix the thermal insulation. Installation is carried out either using self-tapping screws (in the case of wood), or using an anchor (metal frame). The crate should not come close to the edge of the roof. A compensation gap must be maintained here.

Insulation of the ceiling in the garage from the inside continues with the organization of a hydrobarrier. It will protect the insulation from a possible roof leak. Today, special membranes can be found on sale. They do not allow moisture to pass into the thickness of the thermal insulation cake, but they do not prevent vapor exchange inside it. The hydrobarrier sheets are overlapped (at least 10 cm). The joints are glued with construction tape. The fastening of the material is carried out along the lags using a stapler or special staples.

All work can be done by hand. However, if a person does not have the necessary skills and does not know how to insulate the ceiling in the garage from the inside, it is better to trust the experts.

Not without reason, slab material was chosen as the main insulation. It is easier to lay it by surprise, that is, the plates are closely adjacent to the frame of the crate. Also, there should be no gaps between the plates themselves. Through them, the cold will penetrate inside the garage, and the quality characteristics of the thermal insulation cake will come to naught.

Before insulating the roof of the garage from the inside, calculate the required thickness of the insulation material. During the calculations, the characteristics of the structural material of the garage, the climatic features of the region where it is located are taken into account. The calculation formula can be found in the regulatory documentation.

On top of the insulation along the crate is a vapor barrier. It can be ordinary polyethylene film. It also overlaps. Under it should remain a ventilation gap. Condensate will be removed through it if it falls on the heater. Next comes the second tier of the crate. On it lay the fine finish of the ceiling.

You can find a drawing of a long-burning furnace, but you need to work hard to understand it.

Proper installation of a long-burning stove in a house is a guarantee of safety. Continued here.

External insulation of the room

Liquid foam - penoizol.

How and how to insulate the roof of the garage from the inside? In this case, a thermal insulation material is selected with the following quality characteristics:

with a low coefficient of moisture absorption;
vapor-tight;
resistant to deformation;
with low weight;
with high strength.

Insulation of the garage roof from the outside can be done with foam, as it meets all of the above requirements. Its main properties:

thermal conductivity from 0.037 W / sq. m*K up to 0.041 W/sq. m*K;
vapor permeability up to 0.05 mg / cu. m;
density - from 8 kg / cu. m up to 25kg / cu. m (depending on the brand);
water absorption from 25 to 4% per 1 cu. m;
compressive strength from 0.04 MPa to 0.16 MPa;
bending strength from 0.06 MPa to 0.25 MPa;
self-burning time from 1 sec. Up to 4 sec;
temperature range -60°C…+80°C.

Due to its low density, the material is light in weight. It does not create additional load on the floor. That is why it is possible to insulate the ceiling in the garage with foam plastic from the inside. Low vapor permeability and moisture absorption allow you to mount the insulation outside the building, without fear of getting it wet. Styrofoam does not rot, does not lend itself to the action of an aggressive environment.

The main stages of work:

surface preparation;
installation of the crate;
organization of a vapor barrier;
insulation installation;
hydrobarrier;
the second tier of the crate;
roofing material.

The roof of the garage can be the floor of the second floor.

Before insulating the roof of the garage from the outside, surface preparation is carried out. It consists in removing old, roofing material, rotten sections of the rough coating, protruding nails. Next, a counter crate is organized. It is made from wooden blocks. They are pre-treated with an antiseptic. The step of the crate is equal to the width of the foam. The wood is fastened with self-tapping screws.

Although the foam is vapor-tight, the installation of a vapor barrier is necessary. Moisture vapor from the room always tends to rise. After passing through the wooden roof deck, they will condensate on the cooled foam. The vapor barrier will prevent this. Polyethylene or a special membrane is used as a vapor barrier. She goes over the crate. It is mounted with an overlap, the joints are glued with construction tape.

Laying directly insulation. Styrofoam should go suddenly between the crate. However, for reliability, experts recommend additional fasteners using dowels with wide caps.

There should be no gaps between the foam sheets. It is impossible to foam possible gaps with mounting foam. The explanation is simple: foam and polystyrene have different coefficients of thermal expansion, which will adversely affect the performance of the thermal insulation cake.

On top of the insulation is a hydrobarrier. It could be ruberoid. However, the modern construction market offers to buy geotextiles as a waterproof shell. It does not let water through, but it does not interfere with the vapor exchange between the roofing cake and the environment. Geotextiles can also be used when the ceiling is insulated in the garage with your own hands from the inside. This vapor-permeable material helps to maintain the desired microclimate in the room. Geotextiles are used to mount the second tier of the crate and carry out roofing work.

Is it possible to insulate the garage with foam from the inside?

Poroizolyatsiya overlapped.

Can styrofoam be used indoors? How to properly insulate the ceiling in the garage based on this thermal insulation? According to experts, foam plastic can be used indoors if it is made on the basis of brick, foam blocks or metal. There are cases when the garage is built of wood. Styrofoam interferes with the air exchange of wood. Subsequently, it may rot.

Insulation of the roof of the garage with foam plastic from the inside is carried out as follows (laying the material goes from top to bottom):

Styrofoam sheets should fit tightly between the lags.

The crate can be metal or wood. On top of it is waterproofing. If a special material is used, such as geotextile or isospan, then installation is carried out according to the instructions. The film should run across the roof rafters, smooth side facing out. Sagging of the hydraulic barrier is allowed. There must be a ventilated gap between the film and the crate. To do this, the rough coating of the roof is upholstered from the inside with thin, wooden slats.

Styrofoam plates are laid between the laths of the crate without gaps. For installation, special glue and anchors with wide caps are used. In some cases, fixing the insulation is carried out using auxiliary rails. They are attached to the beams of the main crate in increments of 20-30 cm. Such a crate will later serve as a second ventilation gap.

To insulate the ceiling in the garage with foam plastic without the formation of cold bridges, you need to be attentive to the quality of the thermal insulation material. Only certified goods have dimensions with a minimum error, which guarantees a snug fit of the plates.

A vapor barrier film is laid on top of the insulation. If necessary, at this stage, you can improve the sound insulation of the building or lay reflective thermal insulation. Finally, a clean-up is carried out.

Proper and inexpensive garage roof insulation

A vapor barrier is hermetically sealed on top of the foam.

What can and how to properly insulate the roof of the garage? Today, customers are offered a huge selection of thermal insulation materials. Both mineral and polymer heaters are suitable for the garage. The first are distinguished by affordable cost, the second - by a long service life.

Fiberglass, as a mineral insulation, is more suitable for interior work. Although with good hydro and vapor barrier, it is used to organize a roofing pie. Styrofoam roof of the garage is insulated from the outside. If the garage is made of foam blocks, metal or brick, then the foam is placed on the inside of the roof. In addition to polystyrene and glass wool, polyurethane foam can be used to insulate the garage roof.

Garage insulation from the inside: walls, doors

How to ensure a comfortable temperature in the garage.

Hangar insulation materials

How to properly insulate the ceiling and roof in the garage from the inside

How to insulate the ceiling and roof in the garage? How to properly insulate the inside and outside with foam? Thermal insulation of the garage ceiling based on fiberglass

Garage roof insulation

Materials and tools
Rules and steps for insulating the roof of the garage

Garage roof insulation is a necessary measure in climatic conditions that foresee fairly cold winters. It is very important that the insulation of the garage roof is carried out correctly, using effective thermal insulation, inexpensively and in compliance with appropriate technologies. Knowing how to insulate the roof of the garage, you can carry out all the work very quickly and independently. In addition, it is worth thinking about how, after installing all the insulation structures, to equip the interior of the garage so that it looks quite presentable.

The roof of the garage can also be insulated with foam boards.

Materials and tools

Today there is a huge amount of high-tech insulation materials. However, in order to insulate the garage roof from the inside, it is not advisable to use too expensive options. In addition, it is desirable to do all the work with your own hands, which means that the heaters must be selected those that are as simple and quick to install as possible.

What heater to use?

What is the most rational way to use it so that the roof of the garage is sufficiently thermally insulated and maintains a temperature level in the room that is acceptable for storing vehicles and other things in the cold season? There are several options that are quite affordable and easy to install:

Garage roof insulation scheme.

Styrofoam is a fairly cheap and effective insulation. Considering that today it is produced in different thicknesses (from 2 to 10 cm) and different levels of density (from 15 kg / cm 2 to 25 kg / cm 2), foam can be used with different types of insulation: both from the attic side and from the side of the ceiling. When using foam sheets of lower density from the side of the ceiling, they can be knocked out from below with plywood or chipboard. If you use blocks with a density of 25 kg / cm 2, then you can even apply plaster on them. The disadvantage of foam plastic is that for serious waterproofing, it is necessary to use sufficiently thick blocks that eat up the height of the garage ceiling when glued from the inside.
Extruded polystyrene foam compares favorably with polystyrene in terms of thermal conductivity, as well as density (from 35 kg / cm 2 to 45 kg / cm 2). Such indicators make it possible to use fairly narrow sheets for insulating the garage roof from the inside - from 2 to 5 cm, although expanded polystyrene is also sold in thicker variations. The density of this material contributes to the fact that, by attaching it from the inside to the ceiling, you can use different upholstery sheets and plaster with almost no restrictions.
Mineral wool covered with aluminum foil can also be used to effectively insulate a garage roof. From the inside, from the side of the ceiling, such insulation will be more difficult than installing polystyrene foam or polystyrene foam, but if you need to insulate the garage ceiling from the attic side, then mineral wool sold in rolls will be almost ideal.
Bulk materials (expanded clay, foam chips, granulated foam glass, etc.) can also be successfully used when insulating the roof from the attic side. When using bulk insulation, it is important not to forget to make a waterproofing membrane or polyethylene gasket.

Thus, there are several inexpensive options that provide effective garage roof insulation. The choice between them is solely the responsibility of the garage owner himself, supplemented by his financial capabilities and the ability to independently carry out a simple installation of heaters.

Auxiliary materials and tools

Scheme of a pitched roof with insulation.

In order for the independent installation of one or another type of insulation to be quick and simple, it is necessary to first prepare all the necessary auxiliary tools and materials. What may be needed in the course of work?

Glue or adhesive substances intended for fixing polystyrene foam or expanded polystyrene. With their help, the foam can be glued to the concrete, wooden, metal ceiling of the garage.
Wooden bars, from which the frame will be formed, to which it will later be possible to attach the plywood upholstery of the ceiling.
Drill, puncher, screwdriver, hammer and other carpentry tools, as well as self-tapping screws and dowels for attaching wooden beams to a concrete ceiling (if necessary).
Waterproofing membrane, polyethylene film, waterproofing impregnation for concrete slabs. Needed for additional waterproofing of the garage roof.
Dowels-fungi, with the help of which polystyrene foam and polystyrene can be attached to the ceiling without the use of adhesives.
Water-based paints that can be used to paint foam or polystyrene from the inside of the garage and not upholster the ceiling with additional plywood or chipboard.

The set of tools and materials used depends only on how and with what material the insulation will be carried out.

Rules and steps for insulating the roof of the garage

In order for the insulation to be effective and last for a long time, it is important to carry out all the work correctly, adhering to certain simple rules and norms. In general, the following nuances of how to insulate a garage roof with the help of one or another heater can be distinguished:

The easiest and fastest option would be to stick foam or polystyrene foam boards on a concrete, wooden or metal ceiling.

Such insulation will be very effective if you first waterproof the concrete or wooden surface of the ceiling. This can be done using film materials, and for concrete slabs it is best to use an impregnating waterproofing material.

Roof insulation diagram.

After gluing the foam, you can not knock it out with plywood, but simply paint it with water-based paint. Styrofoam can not be glued to a wooden ceiling, but fixed with self-tapping screws with a special plastic fungus nozzle. If, in addition to the roof, the walls of the garage are also insulated in the same way, then it will be an excellent thermal box with a fairly stable temperature throughout the year.
If it is supposed to knock out the ceiling with sheets of plywood or chipboard after the installation of insulation, then it is necessary to make a simple frame of parallel lag beams. They are attached to concrete slabs with dowels, and to a wooden ceiling - with simple self-tapping screws. The distance between the lags must correspond to the width of the sheet or block of insulating material.
After installing the wooden frame between the lags, insulation is glued (polystyrene, expanded polystyrene, mineral wool), and then the ceiling sheathing is hemmed. It is important that the height of the log is not less than the thickness of the insulation. The option with a frame and ceiling filing is preferable in terms of decorating a presentable garage interior.
If there is an attic in the garage, which often happens when building on a private plot, and not in a garage cooperative, then you can use bulk materials and insulate not from the ceiling, but from the attic. Bulk materials are beneficial, primarily due to their low cost. Moreover, expanded clay may remain on the site after other construction work. It is important, when insulating the garage roof from the attic side with bulk materials, to cover them with a layer of waterproofing (membrane or film). When using a conventional polyethylene film, it is imperative to ensure ventilation of the space where the insulation will be poured.

Thus, the roof of the garage will not be the weakest place in the garage structure, in terms of thermal conductivity, if it is properly insulated. Considering that the interior of the garage does not require special frills, then all work with the materials listed above can be done independently. At the same time, such work will not take away a lot of financial resources, time and effort from the owner of the garage.

Do-it-yourself garage roof insulation: materials, tools, steps and rules (video)

Insulation of the garage roof from the inside is carried out using various inexpensive materials and available tools. The rules and stages by which the process is carried out.

How to insulate the roof in the garage: external and internal thermal insulation

The opportunity to have a well-built garage prompted car owners to a number of problems associated with the construction of a structure that is actually excellent in terms of its technical and operational indicators. And the first thing you need to pay attention to is the insulation of this small room.

Warming the roof of the garage from the inside

Many may ask, what is it for?

Firstly, the car is in insulated conditions and will last a long time without creating problems.
Secondly, it is no secret that for many men, the garage is an outlet, this is the place where women are not allowed to enter.
Thirdly, minor repairs, which are usually done by hand, are more pleasant to do in a warm room.

Roof insulation

We return to the issue of insulation and start the conversation with the topic of roof insulation. So what are the ways of warming?

If the construction of the garage is only at the stage of construction of the building, then this process must be carried out immediately. In this case, it is best to insulate the roof of the garage from the outside.
In the event that the building is already ready, and the thermal insulation work has not yet been completed, then the roof of the garage will have to be insulated from the inside.

Let's consider these two methods separately.

External thermal insulation

It should be noted that there are several options for building a garage roof. The simplest is a flat roof, erected from a concrete floor slab, which is covered with heat-insulating and waterproofing materials. It is not difficult to insulate this design. What do the experts offer?

The scheme-instruction is quite simple, it is important to follow the sequence of the stages of laying materials. If the floor slab lies flat without a slope, then this indicator will have to be created with a small cement screed. But keep in mind that roll waterproofing (roofing material or roofing felt) must be laid under the screed.

After the screed dries, a plastic film is laid on it in two or three layers, with a heater on top (choose not the most expensive materials). And now you can start surface waterproofing. These are several layers of overlapped roofing material, over which hot bitumen is poured. True, today polymeric constituent materials are used as fills (the quality is many times higher).

The roof is single-pitched and double-pitched. In this case, the insulation can not be covered from above with waterproofing materials, if the guarantee of non-leakage of the roof is one hundred percent (learn also how to insulate the loggia and what is required for this).

You can only insulate the ceiling. Take on board the usual simple heat insulators (expanded clay, mineral wool, glass wool, polystyrene foam). The technology is the same as for flat roof insulation.

Advice! Be sure to do some minor repairs to the base ceiling. Seal cracks, seams, etc., treat with a primer.

Ask what for? Over time, even the concrete ceiling will begin to crumble, which means that there will be an impact on the layers laid under it. A small repair will extend the service life by ten to fifteen years. The cost of such repairs is cheap, but the benefits are huge.

Advice! It is better to treat the elements of the crate with antiseptic compounds before installation. Why, "DO"? In order for all edges to be processed, after installation, the side attached to the ceiling will remain inaccessible.

It is necessary to fasten the elements of the crate with the help of plastic dowels and self-tapping screws. The distance between the elements is determined by the width of the heat-insulating material used.

So, the crate is ready, waterproofing and heat-insulating materials are laid, what's next? Be sure to install a vapor barrier. Many may say that in such a small room, in principle, it is not so necessary. Don't tell.

Remember one very important thought - in a heated room, whether you like it or not, air vapor saturated with moisture will definitely form. So this moisture will begin to condense on heaters, which under such conditions will turn into dust in a couple of years. And you will have to re-insulate the roof of the garage. Who needs it?

So don't skimp on cheap plastic wrap. It can be used as a vapor barrier. The only thing you need to pay attention to is to lay it in several layers. Excellent steam protection.

Warning! The garage is a flammable room, therefore, when choosing a heater, pay attention to this indicator, which is inherent in a particular heat-insulating material.

Since the conversation turned to fire safety, one important note must be made. Ventilation should work "excellent" in the garage. And if there are windows in this room, then their thermal insulation should correspond to such a process as the insulation of plastic windows.

Heat insulators

And now you can answer the question of how to insulate the roof of the garage from the inside. The modern building materials market today offers a fairly wide range, where it is possible to purchase inexpensive, but high-quality heaters. Immediately make a reservation that buying something expensive for these purposes is not worth it. For example, a cork.

Mineral wool in mats and rolls is the most commonly used insulation. Firstly, cheaply, secondly, qualitatively, thirdly, ease of installation. By the way, many ordinary people ask how the mineral wool keeps on the shelf?

Conclusion on the topic

As you can see, in order to carry out the insulation of the garage roof, you can choose several options for the ongoing process. And everyone in this case decides for himself which option is better.

True, much will depend on the criterion - has the garage been built or is under construction.

How to insulate the roof in the garage, do-it-yourself roof insulation from the inside: instructions, photo and video tutorials, price

does not burn;
does not rot;

When deciding how to insulate a garage, it is recommended to use mineral fiber. Its structure is similar to the previous material. However, its production involves the use of other raw materials - basalt. It promotes melting and the formation of fine fibers. Mineral insulation is more flexible and ductile than its fiberglass counterpart. However, the first material is less subjected to mechanical stress. Mineral wool has low thermal conductivity. It is used to isolate noise. If you properly insulate the roof of the garage from the inside with this material, then this design will last for a long time.

Natural heat insulators

Thermal insulation of the garage is also carried out using a polymer. The advantages of such a heater include:

low price and thermal conductivity;
simple installation;
slight weight.

The use of polymer does not require the construction of a vapor barrier. However, it must be protected from the rays of the sun. It should be noted that modern heaters of this type are equipped with a substance that prevents combustion.

As for natural heat insulators, they are rarely used in garages. These builders include cotton wool, felt, cotton insulation. These materials undergo special treatment against ignition. Often, ventilation is isolated with sheet felt. It is not recommended to cover the roof with this material.

Builders are advised to insulate the garage building, given:

Arrangement of ventilation space. Its tasks include extracting exhaust gases.
Fire hazard.

The arrangement of insulation with foil or film is allowed. In this case, moisture will penetrate into the insulation after a while, reducing its properties.

Step-by-step instruction

The roof is insulated from the outside at the stage of building a garage. Such work is carried out with the help of polystyrene foam, dowels, foam, adhesive tape. Initially, a vapor barrier layer is laid. Expanded polystyrene sheets can be used as a heat insulator. This insulation is screwed with dowels. The edges of the plates are glued, and the cracks are filled with foam.

If necessary, expanded polystyrene plates are replaced with mineral wool. However, such a heater is mounted on a wooden frame. The final stage is presented in the form of a hydrobarrier. Then the roofing material is laid.

As for the insulation of the roof of the garage from the inside, this procedure involves the arrangement of a structure of 3 layers:

Hydrobarrier.
Thermal insulation materials.
Vapor barrier.

If the floor is concrete, then the above materials are fixed to the structure. For this, glue or dowels are used. The edges between the plates are additionally lubricated with adhesive. The voids are filled with foam, blown with foam.

It should be noted that before installing the insulation, the surface of the plate is checked.

If necessary, it is cleaned of plaster.

Installation of expanded polystyrene is carried out with a knife. Initially, you will need to cut the material. If there are beams on the ceiling, you will need to sew them up with sheet material. A fibrous heat insulator is attached from below.

When arranging a wooden frame under mineral wool, mats with fibrous insulation are inserted between the bars. If the roof is insulated with liquid penoizol, then it is applied to the surface by spraying. Penoizol easily fills the gaps. It does not need protection from moisture and has a long service life.

The use of polymeric heaters does not provide for the installation of a vapor barrier. A similar material can be used for thermal insulation of walls and garage doors. Such work can be done by hand.

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Shed roof insulation technology

Most garages are equipped with a shed roof, which is the most economical and easy to install and maintain. The basis of this design is a frame wooden system, consisting of bars of a certain section, based on a Mauerlat. It is desirable to ensure high-quality insulation of the roof even in the process of its construction. Then the insulation will become part of the roofing pie, which will protect the interior from the cold in the winter, heat in the summer, the appearance of condensation during significant changes in temperature and humidity.

To insulate the roof of the garage, you must prepare:

fiberglass insulation (Isover, Ursa); or mineral wool;
vapor barrier;
nails and construction buttons;
waterproofing;
carpentry tools;
adhesive tape.

Wooden rafters are usually spaced about 60 cm apart. This is due to the fact that the width of the traditional insulation in rolls or mats is 61 cm. The technological margin allows the canvas to fit tightly, without gaps, into the gap between the bars.

Initially, a vapor barrier is fixed between the rafters from the inside of the garage. Fastening is carried out using building brackets or buttons. Be sure to achieve complete tightness of the vapor barrier layers. To do this, the joints of the material are carefully glued with adhesive tape. Inside the garage, the vapor barrier will be protected by any type of finish: clapboard, fiberboard, drywall, finish panels, etc.

Outside, between the rafters, fiberglass or mineral wool with a thickness of at least 150 mm is laid. Cutting the material, if necessary, is carried out with a special construction knife. When laying, a very tight fit of the joints of the material is achieved.

The edges of the thermal insulation must coincide with the vertical surface of the outer part of the walls. The insulation is limited to a 150 mm board, which is nailed between the rafters. At the board, the top edge should be flush with the rafters so that the thermal insulation is protected on all sides by wood.

Garage flat roof insulation

If reinforced concrete slabs are laid as the base of the roof on the garage, thermal insulation is performed outside the structure. For these purposes, foam is suitable, on top of which a concrete screed is arranged.

According to the technology, it is first necessary to carry out thorough preparatory work. Plates are cleaned from dust, dirt and various influxes. The joints between the plates, as well as the junctions to the outer walls, must be sealed with high-strength mounting foam or caulked with fiberglass. High-strength foam is laid on top of the prepared surface. It is necessary to lay the heat insulator in two layers in a run with an overlap. Between themselves, the insulation plates can be fixed with a construction film.

A layer of waterproofing is laid on the insulation. The best option in terms of price and quality can be a roofing film or a regular roofing material. A concrete screed with reinforcement or special plastic additives (reinforced fiber) is mounted on the prepared layer. It is also recommended to add special frost-resistant solutions to the concrete composition to avoid cracking of the coating.

Roof insulation from the inside of the garage

For high-quality insulation of the roof from the inside, three layers of insulation are laid from the inside: a hydrobarrier, thermal insulation and a vapor barrier. The organization of such a "pie" can be carried out both on reinforced concrete slabs and when constructing a wooden beam structure. First, the beams must be sewn up from the inside of the structure with sheet material. Then waterproofing, insulation and any type of vapor barrier are fixed to it.

The sprayed thermal insulation, carried out by reliable and durable polyurethane foam, has proven itself well. This is a fast and effective method, characterized by increased moisture resistance, fire resistance and durability. Polyurethane foam during application fills all voids hermetically and firmly. An important advantage of this technology is the absence of the need to use additional layers of vapor barrier. After spraying, the material can be immediately finished on the inside with any frame systems.

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Garage roof insulation

How to insulate the roof of the garage now we will understand the details. All work is done in the following sequence:

Choosing a material

Insulation for the roof of the garage is best laid at the initial stage of construction. But if you didn’t do it right away, then you can do this work later.
Only the price of its installation will be higher. After all, this will be much more difficult to do. Although if you do the work yourself, then it will not be so noticeable. Below are instructions on how to do this job. Also on the video you can see the individual stages.

Fiberglass

This material is made from glass waste. The initial raw material is pulled into thin fibers, after which they are trimmed and cooled. As a result, fiberglass threads are obtained, which are assembled into one whole, pressed and packed into plates.

The advantage of such a heater is that it is not subject to fire, rotting and collapsing under the influence of harmful conditions.
The structure of the insulation made of such material is characterized by low thermal conductivity.
It is worth saying that fiberglass is quite fragile, so you need to limit it from mechanical and physical impact.

Attention: The main rule when installing this type of insulation is the accuracy of installation and the presence of protective gloves and a respirator. Protective measures are determined by the likelihood of being damaged by the smallest particles of fibers, which, when in contact with the skin or mucous membranes, lead to irritation.

mineral insulation

This material is similar to fiberglass in terms of production technology. The difference lies in the original raw material that is used to produce fibers.

The main material is basalt rocks. After they are melted, thin threads are made. Mineral insulation is also called mineral wool.

Its main advantage over fiberglass is its flexibility and ductility.
With proper installation, mineral wool can last for several decades. But for this you need to organize the protection of the insulation from moisture penetration. This is achieved through the use of vapor barrier.
It is also worth considering protection against mechanical influences.
Compared to other heaters, mineral wool is in great demand due to its high technical and insulating parameters and ease of installation.

Polymer insulation

Also very popular among consumers. Any kind of polymer insulation is produced using the same technologies.
So:

The porosity of the polymer structure perfectly retains heat for a long time. At the same time, such material is not susceptible to moisture, mold and fungi deposits. Insulation is produced in the form of tiles of different sizes. The weight of the finished material is small, so the design does not become heavier during insulation.
Of course, polymer insulation has several disadvantages. This includes poor resistance to sunlight, as well as the flammability of the material. In addition, rodents can settle in such material.

What points should be paid attention to when choosing a material

Any type of insulation is unique in its own way:

If you are going to insulate the garage yourself, then you should not purchase polymer materials that ignite quickly. Work on its internal installation should be carried out by specialists. Well, outside you can insulate the room with mineral wool yourself.
The best option would be fibrous type heaters that do not allow moisture to pass through and are not subject to combustion. But for such heaters you will have to buy a special vapor barrier film or foil.

How to independently perform external insulation of the roof of the garage

Attention: The layer of insulating material for external insulation is located between the roof and the floor slab (wooden crate).

To perform external insulation you will need:

Set the outline of the crate. This is necessary for the subsequent arrangement of plates or rolls of insulation;
Steam barrier installation. It is needed to prevent the absorption of steam by the insulation from the room;
Material installation. Here you can use any material discussed above;
Hydrobarrier installation. A film-type protective coating will limit the penetration of moisture into the layer of insulating material;
Installation of battens and roofing. These are the final operations in the work cycle.

It is also worth mentioning separately about the fastening of expanded polystyrene; it can be additionally fixed with dowels:

Joints between slabs must be carefully sealed.
If mineral wool is used as a heater, then its rolls should be located as close as possible to each other. It is preferable to produce insulation in two layers. This is done to overlap the seams of the previous layer.

How to carry out self-insulation of the inside of the garage roof

First you need to make special preparatory operations. They consist in high-quality processing of reinforced concrete slabs.

Attention: An important condition is a flat surface on which the insulation material is to be laid. If this operation is neglected, then air cavities will appear under the layer, where condensate will accumulate.

Installing polystyrene foam is not difficult. The tiles are easily cut to the required size, the structure of the material can be fixed to the dowel joint.
If the roof structure is made of wooden crossbeams or rafters, then the insulation material is attached directly to them, and the seams foam well. Before laying the material, the surface must be well covered with a layer of vapor barrier to prevent absorption of moisture from the elements of the garage or from atmospheric air.
To install mineral wool in the interior of the room, you should use a construction of wooden blocks. They are fixed to the crate, and already between them are mounted rolls of insulation material.
When using mineral wool, one should also not forget about covering with foil or vapor barrier material from the inside of the garage. Thanks to this, the mineral insulation will be protected from both sides.

It is worth saying what is the easiest way? Practice shows that the easiest roof insulation occurs when using penoizol.
So:

Foam type insulation is applied by spraying.
The structure of matter can penetrate into all depressions and crevices. After drying, the substance begins to expand and be distributed around the entire perimeter.
Penoizol is currently considered one of the highest quality insulation materials.
This material is non-toxic. It is not attractive to insects and rodents, and is not affected by mold and fungal deposits.
The only drawback of such a substance is its high cost. But the term of application can reach up to 70 years.

We insulate with foam

Insulating the roof of the garage with polystyrene foam is perhaps the most common option. It has a low price and installation can be done on its own and with high quality.
What you need to pay attention to when installing this material:

Installation of the material is done after fixing the frame. Here it is important to choose the cells according to the width of the sheets.
Fastening is carried out to the plane, if it is made of brick, then you will need to first make holes with a puncher and make the connection with anchors.
Each element is attached as tightly as possible to the other. Remember, after installation, you will need to seal the seam with foam.
If the frame is made using wood, then it must be processed before installation. Otherwise, it won't last long.

It is not difficult to insulate the roof of the garage with polystyrene foam and you can do everything yourself. You already know how to insulate the roof of a metal garage and after looking at the photo you can get to work.

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Proper insulation of the roof of the garage from the outside or from the inside

Which of the motorists does not spend half a day in the garage, giving all his soul to his beloved car?! But, as experience shows, for this "piece of iron" one spiritual warmth is not enough: she is afraid of cold and temperature changes.

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Foam insulation
Glass wool insulation
Penoizol insulation
Warming outside
A few words about heaters

Yes, and car maintenance in the autumn-winter season in a cold garage cannot be of high quality. What if it's a repair? It is unlikely that you will have enough physical and moral strength to tighten the nuts in an icy room.

Therefore, take care of the insulation of the garage should be in advance.

The largest percentage of heat leakage occurs through the roof. And you need to start insulation work "from above" - from the roof.

How to properly insulate the roof of the garage from the inside

In each individual case, the insulation of the garage roof can differ significantly: the location of the layers of insulation, the material with which you are going to insulate your garage, the design features of the roof, under which you will need to "adjust" the insulation.

The only thing that should remain unchanged and on which the quality of insulation largely depends is the presence of waterproofing and vapor barrier layers in the roof structure.

If there are none, then all further work on the insulation of the garage will turn into Sisyphean labor.

Make sure that the roof is equipped with effective vapor and waterproofing, and only after that proceed with the process of insulation.

If there is no insulation, then you will have to deal with the insulation issue first, and then the insulation one. And all this - overnight.

First, prepare a set of tools necessary for work:

directly insulation;
waterproofing material;
film to provide vapor barrier;
self-adhesive tape;
special buttons;
carpentry tools.

Foam insulation

In order for the insulation of the garage roof with the help of foam to be as effective as possible, you need to know the nuances of installing this material:

fastening of plates is carried out only with glue;
the installation of the crate is optional and undesirable, since the bolt holes can break the tightness of the roof and become an additional cause of heat leakage;
Styrofoam sheets can be used for both decorative and functional purposes. After insulation, you can build something like a false ceiling from the remnants, which can be used:

as an attic for storing spare parts;
as an additional thermal insulation layer;
as a decorative element.

Glass wool insulation

Glass wool is a good option for insulating material. Thick, but soft and supple, the insulation can be placed without problems in the most inconvenient places for other insulation materials: cotton wool will fit everywhere.

But even when working with such a flexible material, some features must be taken into account:

if the crate is solid, then it is better to fix the insulation from the bottom of the structure - this will be both more convenient and more efficient;
if the crate is discharged, the wool must be placed between the rafters, and the waterproofing should be mounted already on top of the insulation;
pay attention to the features of the roof structure and place the insulation depending on how the roof suggests it;
waterproofing film should not be placed in such a way that it is in close contact with the insulation, unless you have chosen a coating with a superdiffusion membrane as the insulating material.

For high-quality fixing of glass wool (or mineral wool), you will have to work hard and build wooden beams on the ceiling in order to place layers of insulation between them.

This method is simpler and more accessible than the others. Using penoizol in the process of insulating the roof of the garage, there is no need to bother too much and spend a lot of time: the material is simply applied to the surface by spraying, and it itself penetrates into all the cracks and cracks, quickly hardens, forming a neat even layer.

Penoizol does not require any protection against moisture and is designed for long-term operation.

As a rule, the external insulation of the garage roof is carried out during the construction process, since it is not very convenient to pick open an already finished building in order to correct omissions.

The first thing you need to pay attention to when insulating the roof of the garage from the outside is the presence of a vapor barrier from the side of the room in order to avoid secondary condensation of vapors and unpleasant smudges on the walls in the future.

The outer roofing "puff" is the same as the inner one:

waterproofing;
insulation;
vapor barrier;
lower decorative trim (or not very decorative).

Now consider how to make external insulation in stages:

Lay the first layer of the vapor barrier, it will serve as the main protection against moisture on the insulation and guarantee the operation of the insulation for as long as possible.
Attach a layer of thermal insulation material. Make sure there are as few gaps as possible. If the sheets do not fit snugly together, blow out the cracks with mounting foam (the advice applies if you insulate the roof with foam).
The last layer is a hydrobarrier. It will be more reliable and efficient if the film is also sealed with adhesive tape in the area of \u200b\u200bthe joints.
Roofing materials can be laid on the finished hydrobarrier.

A few words about heaters

Each owner of a garage and everything in this garage cares, first of all, about the safety of the car, about their health and about the comfort in the room, which for most motorists becomes a second home.

Therefore, a lot depends on the choice of insulation for the garage, and you need to choose it so that the insulation is not redone ten times.

Fiberglass (cotton wool) - retains heat perfectly, does not rot (no fungus is afraid of it), fire resistant, does not change its characteristics for a long time. But he is afraid of mechanical impact: if fiberglass mats were hit during careless transportation, then such material will no longer provide high-quality thermal insulation. Upon impact, glass fibers are damaged and the material loses its properties.

In addition, glass fibers have a negative effect on mucous membranes; it is not recommended to work with such material without gloves, goggles and a respirator.

Styrofoam is a lightweight, porous structure material that is able to retain heat well, is not affected by microorganisms and fungi. This material absolutely does not accumulate moisture, so you can, without too much risk, do without a vapor barrier.

Styrofoam is produced in sheets of various thicknesses and areas, due to its low weight, this material will allow you to save on rafters.

Liquid penoizol is the newest and most convenient of all insulation materials. It is absolutely harmless to humans, its service life is at least 50 years.

The only drawback of penoizol is the too high price.

And here is a video about the insulation of the roof and walls with Ecothermix material.

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What thermal insulation material to choose: how to insulate the roof of the garage

Roof insulation in modern construction is carried out in combination, combining classic insulation with a reflective heat insulator that does not transmit infrared radiation.

You can, of course, use traditional methods, for example, to insulate the roof with sawdust, but protection as effective as in the case of modern materials will not work.

Mineral wool has excellent technical characteristics. It is used with the obligatory organization of vapor and waterproofing layers to protect the insulation from water. At the same time, a “breathing” gap must be maintained. Minvata is quite affordable.

Glass wool is even cheaper, but there is one thing - this material is included in the group of flammable materials. For a pitched roof, a special type of glass wool is produced, which is distinguished by the density of the structure. It is packaged in rolls with a width corresponding to the standard step of the rafter legs.

Styrofoam in terms of its thermal insulation properties is not inferior to mineral wool, but it is waterproof. Lightweight material is easy to install, and also inexpensive. Although polystyrene is considered a combustible material, the PBS-S brand, due to the addition of flame retardants, is capable of self-extinguishing. Therefore, it is quite suitable for warming the garage. In addition, polystyrene is a bacteriologically resistant material - it is not subject to decay, it is not afraid of fungus and mold.

You can insulate the roof with foam, for example, Penoizol - liquid foam. Waterproof and fire-resistant, it solidifies when it fills a closed space. In this case, a seamless coating is formed, which, in terms of its technical characteristics, is no worse than the best classic insulation. Despite the fact that it is one and a half times cheaper than sheet foam, Penoizol can last up to 40 years without losing its properties.

External insulation: how to insulate the roof from the outside

clean the plates from dirt, dust and all kinds of influxes;
the joints between the plates and the junction with the walls are sealed with mounting foam or caulked with fiberglass.

As a heater, for example, foam with increased strength characteristics is used. Lay it in a run with an overlap in two layers. Styrofoam plates are fixed to each other with a construction film.

If the roof of the garage is pitched, then the scheme of its insulation changes.

First, a vapor barrier is laid on the inside of the rafters, which is fastened with building brackets or buttons, and the joints are glued with adhesive tape.

A prerequisite is the complete tightness of the vapor barrier layers.

Internal insulation of the under-roof space

High-quality roof insulation is provided by a three-layer “pie” laid out on the inside:

hydro barrier,
thermal insulation,
vapor barrier.

(No Ratings Yet)

Often, households are interested in how to insulate the garage roof on their own. Such work is carried out in order to limit the amount of moisture in the garage. To do this, builders recommend the use of various roof insulation.

The scheme of insulation of the roof of the garage.

Before you insulate the roof of the garage, you should decide on the material. For these purposes, glass fiber can be used. It is made from the waste products of the respective enterprises. The fight is straightened, drawn into threads, which are then cut and cooled. Such insulation is produced in rolls or in the form of plates. Its properties include the following:

does not burn;
does not rot;
does not collapse due to the influence of an aggressive environment;
has low thermal conductivity.

Scheme of insulation of the roof of the garage from the outside.

Builders know how to insulate the garage roof with such material. They recommend throughout the work to ensure that small particles do not fall on the skin, as well as the eyes and respiratory organs. Otherwise, you need to seek help from a doctor. When buying fiberglass, you should make sure that the packaging is intact. If moisture has penetrated this insulation, then the room will be poorly insulated from the cold.