How to properly insulate the roof of the house from the inside. How to use glass wool as insulation Insulation of walls with glass wool technology from the inside

At the level with the walls, the roof of the house is the leader in heat loss, so it is simply necessary to insulate the roof of the house during construction or during the operation of housing. An insulated roof will keep the temperature in the house and provide comfortable living conditions. To get the desired result, you need to follow some rules and follow the technologies that we will tell you about in the article.

The choice of materials for insulation

The main ones for roof insulation are polystyrene, expanded polystyrene, mineral wool and glass wool. There are other materials, but they are fundamentally inferior in quality to the proposed materials, so we will not consider them, but consider how to properly insulate the roof of the house with the materials we have proposed.

Styrofoam and expanded polystyrene

Styrofoam and expanded polystyrene are a common insulation that has many qualities. Such material is not only resistant to moisture, does not stray, but also has durability.

To the listed qualities, one must add the fact that, according to statistics, these two materials have the lowest thermal conductivity, therefore, in the best way they protect the house from heat loss. In addition, polystyrene foam and polystyrene foam are quite easy to install, but more on that later.

Mineral wool and glass wool

Mineral wool and glass wool, as well as polystyrene, are excellent insulating materials, but differ in their qualities and specifics of operation. These two materials also have low thermal conductivity, have a much lower weight, unlike polystyrene, which makes them more suitable for insulating wooden houses with a not very reinforced roof frame.

The negative quality of using mineral wool and glass wool as a roof insulation is that these materials, unlike the first two, are very susceptible to moisture, and therefore require the combined use of waterproofing materials and mastics. In addition, cotton wool tends to stray and exfoliate over time. And dust granules containing cotton wool particles are very strong allergens.

roof insulation technology

So, having decided on the question of how to insulate the roof, we proceed to calculate the required amount of materials. Depending on the design of the roof frame, you may need timber and plank to create sectors in the absence of open roof rafters. The technique of roof insulation, depending on the material chosen, varies.

Roof insulation with mineral wool or glass wool

First of all, when using these materials, the inner surface of the roof is sheathed with waterproofing material or mastic, if the surface is solid. This action will help protect the insulation from moisture from the outside. The next step is the construction of sectors, they will be required in the absence of rafters in the roof structure. Insulation material is purchased with a width equal to the width between the rafters or beams of the sectors.

Next, the insulation is placed between the bars on the pre-laid waterproofing and is located as close to each other as possible. When the insulation is laid on top, it must be covered with a vapor barrier material. This action will help protect the insulation wool from moisture from inside the room. After covering with a vapor barrier, the roof from the inside can be sheathed with clapboard or other building materials for cladding rooms, so you should get a room similar to the image in the figure.

Video review: How to insulate the roof

How to insulate a roof Detailed instructions from ISOVER

Insulation with expanded polystyrene and polystyrene foam

The technique of insulation with these materials is the same as with glass wool insulation. Styrofoam sheets are stacked in sectors or between rafters. Foam sheets, as in the first case, should be stacked closely. For a better result, you can lay the foam in two layers. After laying polystyrene foam or polystyrene, the surface should be sheathed, as in the first case.

Video review: Roof insulation with polystyrene foam

Roof insulation with polystyrene foam

The methods of roof insulation described above are suitable for the insulation of private, country and country houses. The roof can be insulated both from the outside and from the inside. Roof insulation techniques vary, but the principle remains the same. In cases where wool is used, primary waterproofing and covering the insulation from above with insulating material will be necessary.

Various materials are used to insulate houses. One of the most popular is building glass wool insulation. This is a material that is compressed plates, which are obtained from thin long remelted fibers of glass, sand, lime and dolomite.

Glass wool properties

Glass wool has a high density, which provides thermal insulation and air impermeability

Glass wool insulation has a number of properties, for which it has become widespread and in demand. Among them are the following:

High density. It is formed as a result of twisting the fibers together into a kind of cocoons. This ensures thermal insulation and impermeability of cold air.
Well absorbs noise that can come from a person, animals, machines.
Fireproof material. The composition contains binder resins, but they do not belong to the group of combustible and spontaneously igniting substances.
Resistance to external influences: chemical, biological and mechanical. Fiberglass insulation does not lose its shape and size even after prolonged use, mice do not gnaw it, and fungus does not appear on it.

These characteristics make glass wool a popular material for insulating rooms.

Types of glass wool

Glass wool is classified according to the method of manufacture and use.

According to the manufacturing method

It is produced by two methods: continuous production and staple. Packed in different forms: rolls, mats, shells.

By Application

Steklovata is available in different versions depending on the application. The same factor affects the main properties: thermal insulation, sound insulation, elasticity.

For horizontal masonry (e.g. glass wool insulation).
For outdoor or indoor use.
For pitched roofs.
To fill gaps.

When choosing the form of packaging of insulation, you should focus on the scope of its application.

Material advantages

Table of comparative characteristics of various types of insulation

Glass wool is a very flexible material that adheres tightly to planes. It has high strength and vibration resistance.

At high temperatures, the material does not emit harmful toxic substances that adversely affect the human body. For many years does not lose its qualities.

The material is lightweight and leaves very little debris during use.

Wall insulation methods

For siding

insulation for siding

The walls of the house are best insulated with mats. First, the surface is leveled and dried. Then a waterproofing film is attached to it. Bars of 5x5 are stuffed on top of it. The interval between them should be 1 cm less than the width of the wool, due to this, the tightness of the material against the wall is achieved.

It is necessary to lay the mats sequentially from the bottom up. They are attached to the wall with special dowels. A layer of film is again laid on top, which is glued at the joints and attached to the bars. Finally, the wall is covered with siding.

For plaster

The use of glass wool for insulation under plaster

Pre-prepare the wall: clean and primer. A frame is made, which is attached to it. They begin to distribute cotton wool: it is attached in a checkerboard pattern using a special polymer cement adhesive. After two or three days, dowels are used for additional fastening. Then the glass wool is pasted over and plastered. The wall is primed, after which it is already possible to proceed with decorative finishing.

Roof insulation

Roof insulation is a very important part, since about 30% of heat is lost due to it. First you need to perform waterproofing. At the same time, it should be attached with a slight overhang, without stretching. Nails are driven into the rafters at intervals of 40 cm: they will hold the cotton wool until the work is completed. After that, the insulation is laid, and on top - the metal profile, which is then covered with a waterproofing film. At the end, everything is sewn up with prepared material.

Mineral wool or glass wool

Working with mineral wool is safer than working with fiberglass, which can cause damage to the skin.

Insulation of the house is an important issue on which the coziness and comfort of stay depend. The most common materials are stone heat insulator and glass wool.

The difference between mineral wool and glass wool is expressed in the following components:

Strength and elasticity. The thickness of the mineral wool is from 2 to 10 microns. For the second material, this number varies from 3 to 15 microns. At the same time, in a glass wool-based insulation, the fibers are approximately 3-4 times shorter in length. This is insignificant, but affects the density and elasticity of products.
Temperature resistance. The limiting temperature of the first is up to 700 °C, and the second is up to 450 °C.
Ease of use. The use of basalt based material is safer than fiberglass. The latter are pungent, so they can cause minor damage to the skin.
Price. Minvata usually costs more. At the same time, it will not be difficult to acquire material - it can be found in the public domain.

What is better: glass wool or basalt wool, everyone decides for himself, focusing on the distinctive features. Both materials do a good job with the main task - the insulation of rooms.

Foreword. Insulating the roof from the inside with polystyrene foam or mineral wool is a fertile occupation for the owner, who seeks to do something in the house on his own. Add to the desire the ability to be accurate and accurate in detail, and the insulation of a gable roof from the inside will go like clockwork. You just need to choose a heater, read the recommendations in this article and watch the video instructions for the work.

Warming of a private house

Cold floor insulation

How to insulate the walls in the house

How to insulate an attic at home

Internal wall insulation

Materials for insulating a pitched roof from the inside

We will show a video on roof insulation with mineral wool at the end of the article, and now it’s worth talking about the materials used to insulate a shed and gable roof. It is really easy to insulate from the inside, anyone can solve this problem, the main thing is to choose the right material and follow the rules of use.

Everything about roof insulation from the inside: an overview of the most modern insulation technologies

For a long time in Russia, there were no problems with roof insulation at all: straw was knitted or reed was dried, and that’s it - the roof of the house was reliably protected from both rain and cold. But modern coatings do not have heat-insulating properties at all, and with all the development of progress, up to 30% of all heat flows through such a roof.

Therefore, if you do not want to warm the atmosphere, study the roof insulation from the inside in detail - in this article we will reveal all the points!

Types of roof according to attic parameters: “cold” and “warm”

Conventionally, roof insulation in the construction world is divided into attic, when the roof slopes are insulated, and attic, when the ceiling is thermally insulated.

Like this? We can say that attics also have their own attic - this is a ventilation gap between the internal insulation and the laid roofing. The fact is that according to all the laws of physics, heat always rises and looks for its way out into the atmosphere. It passes both through the insulation and through the vapor barrier, and together with water vapor. And then, in the eaves plumb line, outside air is drawn in, which passes to the ridge and along the way picks up with it both vapors and excess heat. Through aerators or the same skate, all this is safely removed and does not cause any problems.

Those. in an ordinary, unused roof, the attic occupies the entire space from the ridge to the attic floor, and in the attic, the attic is just a small space under the slopes between the insulation and the roofing. And in the insulation of both, the type of roof is its own approach, which we will now study.

Cold roof insulation technology

If your roof is cold, then the heat-insulating layer should not be on the slopes, but on the floor of the attic. It is here that it stops the heat flow coming from below and prevents the cold from the roof from descending into the lower living space. As a result, the temperature in the attic is kept within + 1-2 degrees, the roofing material is not heated. In fact, such an attic serves as a necessary air gap between the living rooms of the house and the thin roof slab.

All rolled, slab and loose heaters are suitable for attic flooring. Because the overlap of the slope does not have, it does not have any special requirements for the heat-insulating material used: nothing will crumble and will not be exposed.

Pay attention to the fact that after the roof is insulated, properly organized ventilation remains in it: there must be dormer windows opposite each other, ventilation ridges and aerators, and in the cornices - round-the-clock access for outside air suction. As a result, the temperature in a non-residential attic should be as close as possible to the street temperature, and the living space is already separated from it below - competent thermal insulation of the floor.

Now let's take a closer look at the insulation of a cold roof.

Warming with mineral wool

When insulating the attic floor with mineral wool, first of all, pay attention to the distance between the slats or logs - it should be slightly less than a roll or mat of insulation.

Usually, the thermal insulation of the internal space of the roof is complicated by the uneven surface of the attic floor, differences in its height, a large number of rails and bars, not to mention ventilation pipes and electrical wiring:

Ecowool insulation

If you want the house to breathe and the steam to easily go up, then insulate the attic floor with modern ecowool:

Insulation with blown wool

Recently, blowing - roof insulation with blown wool has become increasingly popular. The Japanese "insulation" Esbro-Vul II is used here, which does not emit dust, and therefore does not create problems. And the blowing method itself is actually quite simple:

Step 1. We put a vertical ruler on the floor and mark the required height for spraying mineral wool.
Step 2. Apply insulation in an even layer to the desired level.
Step 3. We lay the insulation so tightly that it has 25 kg of weight per cubic meter.

Note that this type of insulation in Japan is the most popular, and has already found many supporters in Russia.

Glass wool insulation

And finally, glass wool - if you do not use the attic at all. The fact is that even glass wool closed under the crate sometimes causes irritation of the ENT organs. Why do you have to wear a respirator and goggles when working with it:

Insulation with sawdust

When insulating the roof with sawdust, follow these instructions:

Step 1. First of all, you need to protect the wooden structure. To do this, we first apply an antiseptic composition, then fire-bioprotective mixtures, and on top - water repellents.
Step 2. The next step is to put a substrate (you can use cardboard) and close the seams and cracks, if any, with foam (large) or sealant (small). At the end, we cut the foam that has come out and equalize it with the beams.
Step 3. Now we fill up the sawdust, in two layers: first, a larger fraction, as well as chips, and then a fine one, so that dust does not form in the room.
Step 4. But so that rodents do not start on the attic floor, in addition to sawdust, mix dry lime and small broken glass.

Warm roof technology

The mansard roof is a special design. Here, too, there is a cold attic, only it is very small, because. the insulated attic ceiling is almost closely drawn to it with the help of an additional crate. In fact, there is only space for ventilation, and no more. And ventilation serves to ensure that the heat from the attic does not touch the roofing, on which the snow in winter should remain as a heat insulator, and not melt.

Here is a vivid example of the most standard situation of improper attic insulation: they install the cheapest 15 cm rafters, put fluffy mineral wool in two layers of 5 cm each and cover it all with roofing. Ventilation - only 5 cm, without inflow and exit, because There was no expert around to advise. As a result, in summer - unbearable heat, from which even air conditioners do not save, and in winter - generous frost on the roof. And all because street air is heated most of all in this scheme. In other words, the very small attic that we talked about must be, and far from 5 cm.

And especially carefully in such a roof you need to think over the vapor barrier:

And further. The material for the manufacture of rafters is always designed for a certain weight. So, a roof under soft tiles can also be built from drywall profiles, only it cannot be insulated with heavy basalt wool. Also, the mansard roof needs good forced ventilation so that the insulation does not rot and deteriorate. Therefore, carefully read all the points of the master classes prepared by us:

Warming with mineral wool

Follow this simple guide:

Step 1. We install hydro and wind protection. If possible, use modern membranes - they are stronger and more durable. In any case, fasten the material with an overlap, and glue all the joints with construction tape.
Step 2. Now we measure the distance between adjacent rafters.
Step 3. Using a regular or clerical knife, we easily cut the insulation into the desired pieces and insert it between the rafters.
Step 4. We install an additional crate between the membrane and the inner lining.

Please note that you need to fasten the vapor barrier membrane with the smooth side to the insulation, and the fleecy side already inside the room.

If the distance between the beams is not more than 60 centimeters, it will be more convenient for you to use square insulation mats:

Step 1 Inside, under the rafters, it is desirable to finish off the rough crate - so that the insulation has something to rest on. Make the distance between the bars about 20-30 cm. Ordinary uncut wood with medium-sized nails is quite suitable for this purpose, it is only important that the bars are of the same thickness.
Step 2. After installing the rough crate inside the structure, remove all dust and dirt with a construction vacuum cleaner.
Step 3. Next, we process everything wooden with a special remedy for fungus, rot and mold. Just use for this purpose not a spray gun, which is less effective, but an ordinary paint brush. With its help, you can achieve deep penetration of the product into the wood, and this is important.
Step 4. Let the product fully absorb and dry for two to three days.

As a result, all your sheets should lie tightly - a little denser than you need at first glance. This is the only way to avoid the presence of cracks and subsequent freezing of the roof.

And one more thing: ordinary mineral wool boards are not very suitable for insulating roof slopes, because. they do not hold well between the rafters, but the pediments can be insulated with them.

Glass wool insulation

To insulate the roof slopes, get the best glass wool from well-known manufacturers. Such glass wool practically does not contain dangerous glass dust, which most of all annoys workers. Also, even after laying, it does not emit harmful substances, which is even confirmed by the Finnish Institute of Health. After all, it is one thing to throw this “thorn” on the floor of an unused attic, and another thing to cover it with clapboard in a billiard room or private office on the attic floor.

Combined insulation

If desired and expedient, it is possible to insulate the roof from the inside with two different types of heaters at the same time. But one important point must be taken into account - vapor permeability. The fact is that when choosing different heaters for an effective combination, we usually only summarize their heat-insulating properties. But their steam capacity is completely different!

And, if, for example, you put mineral wool down during insulation, and then foam plastic on top, then the water vapor that got into the cotton wool will begin to tend to the colder part of the roof and bury itself in an absolutely non-breathable foam plastic. As a result, all the insulation will simply suffocate and “please” with mold. But on the contrary, it is possible: first we put polystyrene on the bottom of the rafters, and on it already - mineral wool. If some steam passes through the vapor barrier and the gaps between the foam plates, it will easily overcome the mineral wool and enter the ventilation duct. Therefore, there is such a rule: the top layer of insulation should always have high vapor permeability and thermal conductivity.

And, finally, if a warm roof is to be used as a sauna or an additional bathroom, the insulation and roofing cake in it must be thought out especially carefully.

Do-it-yourself roof insulation technology from the inside

In some cases, roof insulation from the inside is a prerequisite for a comfortable microclimate in the house. These include the conversion of a non-residential attic into a heated attic floor, as well as the replacement of roofing, such as slate, with metal tiles or corrugated board, on which condensation and frost easily form during temperature changes.

Roof insulation from the inside is carried out using any suitable heat-insulating materials with one condition: they must provide waterproofing from the outside and vapor permeability from the inside. In other words, moisture from condensate should not enter the insulation layer, but at the same time water vapor should be successfully removed from the interior of the attic or attic space.

Principles of roof insulation from the inside

Fibrous insulation materials such as mineral wool are best suited for these purposes. Unlike insulation with foam plastic, foam plastic or polyurethane foam, they conduct water vapor well, and the direction of water vapor removal from the inside to the outside is ensured by using special membrane films.

Moisture removal is necessary not only to reduce humidity in the attic room. Fibrous insulation, when wet, lose some of their heat-insulating properties, wrinkle and deform. Therefore, when insulating the roof from the inside, it is necessary to strictly observe the sequence of layers of the so-called “pie”. The first layer on the inside is usually a decorative finish, it can be any material: lining, drywall, plywood. Often it also plays the role of a filing that provides support for the insulation. Next, you need a small ventilation gap of 2-3 cm, which provides free air circulation. The next layer is a vapor-permeable membrane, and the direction of vapor removal should be directed towards the insulation. The insulation itself must be of sufficient thickness for good thermal insulation, at least 3 cm. For a residential attic floor, a layer of insulation from 10 cm is usually laid. A vapor-permeable waterproofing film with windproof properties is placed on the insulation, while the direction of steam removal should be directed from the insulation to the outside. Thus, the “heat-insulating cake” protects against the penetration of moisture into the insulation from the outside, but does an excellent job of removing water vapor from the room, which ensures comfortable humidity.

Roof insulation technology

Insulation of the roof from the inside begins with the laying of a waterproofing layer. It is more convenient to do this at the stage of covering the roof with roofing materials. Lay it perpendicular to the rafter legs with a slight sag, smooth side up. Strips of material are glued with mounting tape so as to exclude cracks and gaps. After that, counter-rails from a 50 mm bar are stuffed onto the rafter legs, and a planed board crate is placed on the bar. Roofing is laid on the board. In the case of insulating an already finished roof, the waterproofing is fixed under the rafters using a construction stapler, carefully gluing the attachment points with adhesive tape. The rafters must first be treated with an antiseptic, because with this method of fastening, their ventilation is disturbed and rotting becomes possible.

We insulate the roof with foam insulation

There are other ways to insulate the roof, for example, the popular method of spraying foam insulation, such as polyurethane foam. For this, no special preparation is required, but the roof lathing is made solid and covered with an antiseptic. For spraying polyurethane foam, a special installation is required that supplies carbon dioxide under pressure, so it is most often impossible to do it yourself. To insulate the roof from the inside with polyurethane foam, it is necessary to call specialists who will apply a layer of foam of the required thickness to the entire attic space. After expansion and drying, the foam forms a seamless and waterproof layer with low thermal conductivity. The disadvantages of this method include its vapor impermeability, therefore, when insulating the roof from the inside with polyurethane foam in a residential attic floor, it is necessary to equip a forced exhaust to remove excess moisture.

Thermal insulation of the roof will save up to 25% of heat, and on metal roofs it will prevent the formation of ice and condensate, which will extend their service life. If there are living rooms in the attic floor, the insulation layer should be selected in accordance with the heat engineering calculation.

Learning to insulate the roof of the house from the inside

Without high-quality thermal insulation at home, it will not be possible to save on heating in the winter. Walls and floors are not all ways through which heat leaves a living space. In addition to them, it is also necessary to insulate the roof.

Scheme of internal insulation

A kind of cake is a high-quality roof insulation from the inside, consisting in almost all cases of three main layers:

Waterproofing
thermal insulation
vapor barrier

However, the basis of the entire structure is the truss system, which will act as a base link. Inside it is easiest to lay a heat-insulating layer.

Properly selected materials for each of the layers of the cake are the basis of high-quality insulation. The market is rich in various products, but you should not pay attention only to cheap options, preferring the golden mean.

The main purpose of the waterproofing layer is to protect the insulation from moisture from outside. It, accumulating inside it, destroys the structure of the material and renders it unusable. The task of the vapor barrier layer is to keep rising vapors out.

To protect against wet environments, special membrane or film materials are used. The permeability indicators of the former are better, but their market value is more expensive. Since it will not be possible to ensure complete sealing of the insulation, it is necessary to provide for ventilation gaps and seams.

Introductory video on the insulation of a pitched roof in a house

Choosing a thermal insulation material

Many manufacturers offer consumers a wide variety of heat insulators, each of which has positive and negative sides. Among all the performance characteristics, special attention is paid to the following:

The level of moisture absorption - the lower this ability of the materials in question, the longer their service life can be expected
Thermal conductivity - it should be as low as possible. However, this indicator is relative, since an increase in porosity and importance can significantly worsen it.
Insulators with low density have much better thermal insulation performance.

Material selection video

Your attention should also be paid to such characteristics as environmental friendliness, chemical resistance, flammability and frost resistance.

The most widespread for roof insulation from the inside are mineral wool and glass wool. They have all the necessary characteristics and are relatively easy to use.

Expanded polystyrene is no less popular. In addition to high thermal insulation properties, it practically does not absorb moisture, is durable and tough, resistant to high temperatures and open fire. A significant disadvantage is the susceptibility to settling by rodents. That is why it has not received wide distribution.

Other, less common methods of internal insulation are also possible:

The use of spraying is one of the most expensive methods, which is recommended to be entrusted to a professional master. If it is necessary to insulate an ordinary attic, and not an attic, this method should be chosen. Material costs will pay off with operational characteristics
Insulation with liquid compositions (polyurethane foam or foam concrete) is not very popular, as it requires the use of specialized equipment for work

If thermal insulation of a classic attic space is necessary, additional sprinkling of bulk materials (expanded clay, sawdust, sand, etc.) is done above the ceiling.

Let's start warming the roof with our own hands

The most common case is the insulation of pitched roofs using rolled materials. First of all, you need to draw up instructions for yourself, following which you can count on a high quality result. Consider the case when the roof has not yet been laid.

First, you need to go through the attic again and make sure that all the components are in perfect order. If defects are found (rotting, cracks, etc.), they should be repaired immediately.

Sometimes various communication systems are laid on the roof: electrical wiring, heating, water supply, etc. They are also subject to thorough inspection and elimination of defects. Only after the establishment of order can proceed to further work.

The first step is to apply a waterproofing film to the outer surface. In order for it to fulfill its purpose, several rules must be considered:

It is necessary to lay the film across, while at the joints an overlay of strips of about a meter is made, which is glued with adhesive tape
It is necessary to select material for waterproofing only after purchasing a heater so that they match each other in terms of characteristics
In no case should you pull it tightly over the surface. At sub-zero temperatures, it will begin to shrink and, as a result, may burst

Having completed work with waterproofing, it is necessary to proceed with the arrangement of the crate. For her, bars treated with antiseptic materials with a size of no more than 25 mm are recommended. Corrosion-resistant self-tapping screws are used for fixing

Roofing materials can be attached directly to the crate. Things will be a little different with a soft roof. Between it and the wood, it is recommended to place moisture-resistant drywall or chipboard.

The next stage is the laying of heat-insulating material in the gaps between the rafters. It is recommended to adjust the slabs according to the width between the rafter opening, the mats are cut into pieces equal to each other.

The material is laid in such a way that there are no gaps between the elements. It should also not be pressed very tightly against the roof so that there is a ventilation gap.

Another feature is the laying of heat-insulating material not in one, but in two layers. At the same time, they are located relative to each other with an offset so that the through joints close.

Having finished laying the insulation, you can proceed to the next step - tensioning and fastening the vapor barrier film or membrane. It is recommended to nail it to the rafters with staples. It, unlike waterproofing, stretches much denser.

Next, you can proceed to the final stage of roof insulation from the inside - interior decoration. A wooden frame is stuffed over the vapor barrier film, to which the desired finishing material will be attached.

Video on thermal insulation with polyurethane foam

Some Helpful Tips

Insulating the roof from the inside, not everything can go as smoothly as it seems at first. In addition, any truss system has its own characteristics.

We list a number of rules that may come in handy when performing work on roof insulation:

Particular attention should be paid to waterproofing and vapor barrier when working with mineral heaters. They are most susceptible to the accumulation of moisture inside, causing a destructive effect.
Sometimes, under a light roof, the roof truss system is erected from a beam of small section. In this case, you will have to use a combined thermal insulation method, placing the material not only between the beams, but also under them.
When the step of the rafter system is too large, the insulation is additionally fixed with a wire, which is pulled between the screws screwed into the rafters
So that the insulation is not tightly located between the rafters, its width must be greater than the similar characteristic of the openings
Do not make too many layers of insulation. For example, for thermal insulation with a thickness of 20 cm, two layers of 10 cm each will be better than four layers of 5 cm each.
The insulation can be placed close to the super diffusion membrane. In all other cases, it is necessary to leave a ventilation gap
It is necessary to monitor the ventilation gaps, which should not be blocked by heat-insulating material

Absolutely everyone can make high-quality roof insulation from the inside, which will serve for decades, reliably retaining heat and keeping cold out. However, for those who do not want to waste their time and energy, professionals offer their services. The cost of work can vary between 5-25 USD. e. per square.

- this is a fibrous insulation, which is one of several types of mineral wool, but differs from basalt in a smaller fiber diameter and two to four times longer. These two indicators have a significant impact on the properties of the material.

Below, the main properties and technical characteristics of glass wool will be considered, the technology of insulation and the specifics of working with the material will be described.

Properties of glass wool as a heater

This material has:

The negative qualities include:

Types of glass wool

Thanks to a variety of additives, glass wool is produced in different forms:

rolls;
mats;
shell.

In addition, to perform specific work, this insulation is combined with materials such as aluminum foil, polyethylene foam, and waterproofing film.

The specifics of wall insulation

Consider two main methods of insulation:

Roof insulation

The second layer is better to mount not from below, but from above the rafters. In this case, a diffuse membrane is laid over the insulation layer. The diffuse membrane should span over the ridge.

Note: insulation over the rafters is carried out only in sunny weather, because. To do this, you need to remove the roofing material.

Foil thermal insulation of the roof from the inside If rainy weather prevails in the area, then the priority method of warming the second layer will be to fasten the wool from the bottom of the rafters. When using foil glass wool, it must be laid with a metal surface inside the room.

See overview video about glass wool wall insulation:

Glass wool or stone wool has been used for a long time, it is a fairly old method of insulating a house, and yet it is used in real time and in almost all construction companies. The effectiveness of glass wool can be said to be partially irreplaceable. This heat-insulating material can not only insulate large rooms and houses, but also small apartments.

But not only glass wool can be used in, but also alternated with any other material, this will increase heat retention.

The cheapness of glass wool has always attracted a large number of buyers, as it is cheap and of high quality. Do not forget that glass wool, like many other insulating materials, has favorable and unfavorable sides.

Glass wool cannot replace the complete thermal insulation of your home-apartment. But the positive qualities of this material are much more than the minuses.

As mentioned above glass wool
- This is one and not expensive building materials. Since not high cost is that it is made from industrial waste. Approximately half of the raw materials are cheap components.

Glass wool consists of the following components: soda, dolomite, limestone, sand. The main component of Knauf glass wool and other brands is cullet. The production and components of glass wool have not changed for several decades, which means that the primary components are most suitable for it.

Positive and negative properties of glass wool

Disadvantages of fiberglass materials

The right choice of quality glass wool

First, prepare the walls for the main process. We clean the surface of the walls from plaster, dirt, etc. so as not to create a layer that will retain moisture between the cotton and.
The next step is to fix the waterproofing. As mentioned above, we do everything possible so that moisture does not in any way get into the layers between the walls and the wool. Waterproofing is an almost ordinary film that prevents moisture from entering the material. When using a wooden base (etc.) we advise you to attach the oilcloth with a stapler to the boards. Just seal the joints between the films with tape. Pay special attention that the cotton wool that you will mount is not wet.
Next, we make the basis for fastening glass wool. Often they take wooden bars (50x50) that we attach to the wall than the same distance. The distance depends on the length of the material you are using. It subtracts 3-4 cm from this value. All this in order to apply the material as densely as possible to the created cells.