A necessary condition for a comfortable and cozy microclimate in any home is the internal insulation of the roof, and this process must be carried out correctly so that there is no condensation. How to insulate the roof of the house from the inside is of interest to many developers of private houses. Using the instructions, photos, videos from this article, you can solve this problem.
The process of internal roof insulation can be carried out from classic or ultra-modern materials, the main thing is that the insulation provides high-quality vapor permeability from the inside, as well as good waterproofing from the outside.
This means that in no case should condensation penetrate into the layer of insulation created, and moisture should be removed in a timely manner from the internal attic or attic space.
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Rules for internal roof insulation
Mineral wool and other fibrous heaters are the best material for internal insulation of the roof, as they excellently conduct water vapor. This applies to such insulation as:
- urethane foam;
- foam or foam.
They practically do not conduct water vapor, which means that they are absolutely not suitable for internal insulation of the roof.
If fibrous heaters are chosen for roof insulation, it is necessary to take care of moisture removal in advance, otherwise, the material will simply be deformed, gradually crumble and lose most of its properties.
Read more: Tips on how to insulate the wall in the apartment from the inside in a panel house
Those who plan to do this work on their own must clearly follow the sequence of creating layers of the “pie” type. So, some decorative material acts as the very first inner layer:
- plywood;
- drywall;
- lining.
Such finishing materials are used not only as a decorative decoration, but also as a support layer for insulation. A vapor-permeable membrane acts as the next layer, and between it and the finish it is imperative to leave a small ventilation gap, which can be about 3 cm.
The insulation acts as the next layer, its thickness should be 10 cm, a waterproofing vapor-permeable film with windproof qualities should be laid on it. As for the removal of moisture, it should be carried out from the insulation.
Only such a layered “pie” will provide comfortable humidity in the room and will be able to cope with the removal of vapors from the condensate to the outside. Using these instructions, photos and videos, the question of how to insulate the roof of the house from the inside will be resolved. And also you will understand what materials are better to use so that there is no condensation.
Technology of roof insulation
It is necessary to start the process of roof insulation with the installation of a waterproofing layer, it is advisable to carry it out at a time when the roof is just starting to be covered with roofing material.
The waterproofing layer must be laid up with the smooth side with a slight sag, and in order to prevent gaps between the strips of the waterproofing layer, the gaps must be additionally glued with special mounting tape.
Read more: How to insulate the floor in a wooden house from the bottom, without opening the floor
As for the selected heat-insulating material, it must be laid out with the help of rough filing, which can be a strong twine or thin slats. Thermal insulation mats must be laid so that they fill with themselves all the free space between the rafters. If necessary, they can be additionally cut with a very sharp knife.
If the material is laid out correctly, then it can be covered with a special film with vapor barrier properties. On the one hand, this protection has a rough surface, and on the other - a smooth one.
The rough surface should be directed in the opposite direction from the insulation, as it quickly absorbs water vapor.
As for the smooth surface of the film, it should be on the side of the insulation. In order for the film to hold firmly, it will need to be fixed with a stapler, and additionally glue all the places in the mounts and joints.
Next, on the layer of vapor barrier film, you need to fix the profile or guide blocks, then you can carry out the inner lining. In the event that decorative trim is not provided, you can simply use a trim board to create a hem.
Moreover, it must first be thoroughly treated with an antiseptic to prevent the process of decay. The question of how to insulate the roof of the house from the inside is not a quick solution and takes time and patience.
Internal roof insulation with foamed insulation
There is a second option for internal roof insulation using foamed insulation. For this work, practically no special skills are required. It is only necessary to preliminarily and very carefully treat the entire roof crate with an antiseptic solution. Next, it is necessary to prepare a special installation that delivers carbon dioxide under strong pressure.
For applying foamed insulation of the required thickness to the necessary sections of the attic, it is better to call specialists.
As soon as the foam hits the crate, it instantly expands, then dries, after which a waterproof and seamless layer with low thermal conductivity is formed.
The method is considered to be very quick and convenient, however, it has a significant drawback, which is that the foamed insulation is considered a vapor-proof material, which means that in the attic you will have to additionally create a forced extractor hood, with which you can remove excess moisture.
Some people tend to build a house and move into it as soon as possible, and in a hurry they often make big mistakes when doing work on the internal thermal insulation of the roof. But mistakes should not be made in any case, since competent thermal insulation in a private house will help save about 30% of heat.
It should also be noted that thermal insulation on metal roofs will also help to eliminate the formation of condensate and ice.
Novice builders who plan to build a house on their own are interested in the question of how to insulate the roof of the house from the inside, so that subsequently there is no condensation. The network has given a lot of instructions, photos, videos that you can always use.
This issue is significant, since the main task of the roof is not only to protect the interior from the wind. The roof is needed in the house and so that moisture does not penetrate into the interior, respectively, if the internal insulation is not performed correctly, then gradually small droplets of condensate will begin to appear inside the private house, which will gradually grow.
Excess moisture can lead to serious consequences, such as, for example, the appearance of black mold.In addition, due to constant humidity, after some period the wooden elements of the house will begin to rot, and the metal parts will be covered with rust.
Read more: Insulate the house with your own hands outside: selection of materials, standards and installation
Therefore, the question of how to insulate the roof of the house from the inside in a private house, so that there is no condensation, it is necessary to approach with all responsibility, and if there is no experience in the construction business, then it is recommended to entrust such work to specialists with great experience. But if you still decide to do this work yourself, carefully study the instructions, photos and videos.
Why can condensation form?
As mentioned earlier, one of the main reasons is improper insulation of the roof, as a result of which condensate gradually accumulates, and it, in turn, drips on the insulating material, in the instructions, photos, videos available on the network, this is often mentioned.
The constant contact of the insulation with condensate, as a result, leads to the fact that all the thermal insulation characteristics of the installed material are significantly reduced. Having learned how to insulate the roof of the house from the inside, and what material is better to use so that there is no condensation, we can talk about the causes of this common problem.
There are other reasons that can have a significant effect on the appearance of condensate, and the use of low-quality and cheap materials can be attributed to them. If similar materials were used, then the situation will not improve even if the work on internal insulation was carried out according to all the rules.
One of the most common reasons is the lack of adequate ventilation of the ceiling, and this is especially important in cases where some kind of foamed insulation was used to warm the roof.
Of course, the most ideal option would be to attract specialists, but for those who still decided to do this work on their own, it is imperative to know that when using mineral wool or some other fibrous insulation, you must leave a gap.
This gap should be between the vapor barrier film and the crate. As for the insulation boards, they can be laid on top of the rafters or between them. Insulation plates need to be fixed by gluing, as well as fastening with the use of screws, nails or anchors. If there are gaps between the slabs and rafters, they can be quickly eliminated using the most common mounting foam.
The last step in the work on the internal insulation of the roof is to create an interior finish, and experts recommend using gypsum boards, which can be quickly attached with dowels to the rafters.
In some countries, other methods of internal insulation of the roof are used, and the use of sawdust is considered one of the most economical and popular. True, this method of roof insulation has certain features, as well as some disadvantages.
It is necessary to thoroughly dry the sawdust beforehand and thoroughly treat them with an antiseptic, after which the material should be combined with lime, which is called “fluff”. This is necessary in order to prevent the appearance of rodents and pests.
When using internal roof insulation using sawdust, it is imperative that all roofing and rafter elements be treated with an antiseptic, you must also carefully check the wiring. Only then can a mixture of lime and sawdust be poured into the roof cavity. This method of internal insulation of the roof is considered rather laborious, however, it allows you to save up to 40% of heat.
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