Steam insulation for roofing: materials, installation, instructions and references

Despite the fact that the roof looks very simple, it refers to complex structures. For this reason, even the slightest violation of technology leads to the fact that the operation is accompanied by problems. Some of them are detected immediately, others - only after a while. However, the result is an initial failure of the sealing and the subsequent destruction of the roof. In order to ensure a comfortable microclimate in the house, it is necessary to properly equip the roofing cake, among which elements there is a vapor barrier.

The need for a vapor barrier layer

Steam insulation for the roof is absolutely necessary, because the location of any destination, be it a kitchen or a bathroom, presupposes the presence of a certain amount of water vapor. They after formation rise upward, penetrating into the space under the roof, where the insulation material is located. If you do not take appropriate measures, the insulation will absorb moisture, which in time will certainly lead to destructive processes. This necessitates the use of a vapor barrier layer, which must be present in each roof cake. Those owners of private houses that are going to save on buying a vapor barrier, should know that its use allows you to get some benefits. Among them, one can distinguish the possibility of rotting and corrosion, which can occur during the interaction of metal and wood, as well as water vapor. If you use the described layer, you can save on repair and maintenance of the roof system, which will not be exposed to aggressive moisture. Such measures will allow to prolong the life of materials. Steam insulation for the roof will cost less compared to repairing the roof and combating the fungus, as well as with the dampness that can arise in the living rooms.

Materials-steam-insulators

Having visited the store of building materials, you will be able to familiarize yourself with the assortment of special films intended for arrangement of the vapor barrier layer. They are called to perform one function, but they have different properties and qualitative characteristics. Choose from the waterproofing films, anticondensate materials, as well as vapor-barrier barriers. As for the first variety, it is used to prevent steam from entering the insulation layer. Such material has a special internal microperforated structure that allows the pairs to pass into the outer space. The installation of this film must be carried out in such a way that it is removed from the roof covering by the thickness of the elements of the lathing. This gap allows the air masses to freely circulate between the under-roof space, improving the quality of the vapor barrier.

Using such material, you can be sure that it will provide one-sided permeability, while maintaining the dryness of structures and thermal insulation material.

Anti-condensation films

Such a vapor barrier for the roof has a fleecy cloth that is applied to the inner surface. The structure is capable of retaining moisture, except draining it onto the heater. The air circulation, which occurs in the ventilation gaps, contributes to the rapid weathering of moisture. With the help of this material it is possible to provide a reliable vapor barrier, improving the quality of the insulation. Putting this film, you need to turn the adsorption layer to the inside of the living rooms. The distance between the rafters should not be more than 1.2 meters. Fixation of the layer is carried out on the control bar with a slight ventilation gap.

Steam-proof films

Steam insulation for the roof with the help of such materials forms a kind of protective barrier, which is located on the inside of the insulating layer. This film can have aluminum reflex foil, which is used as an additional layer. It is located in such a way that the radiant energy is reflected inside the room. This allows you to achieve the thermos effect. Install the layer close to the insulation, providing an air gap, which eliminates the formation of condensation on the inside of the material. Such films not only perfectly protect the entire structure from moisture, but also reduce heat loss.

Selection guide

If you will carry out a steam insulation of the roof, the material must be selected before the work begins. Thus it is necessary to pay attention to the vapor permeability. This value is characterized by the rate at which the vapor pressure between two media separated by a film is compared. The more impressive the film thickness, the lower its vapor permeability. It is important to take into account the strength of the material. The more impressive the margin of safety, the more reliable will be the finished coating. If the insulation layer loses its original elasticity, it will lead to sagging, while the vapor barrier will eliminate the destruction of the heater, which is affected by gravity.

Fire and durability

Before you can make a vapor barrier, you need to consider some of the characteristics that the described layer should have. Thus, it must be characterized by resistance to the effects of flame. This condition is necessary in order to guarantee fire safety. In addition, pay attention to the environmental friendliness. At the core there must be ingredients that are safe for health. Pay attention to the durability, the warranty period will determine the period during which you absolutely do not have to perform repair work.

Mounting

After you have chosen a vapor barrier for a flat roof, you need to familiarize yourself with the installation technology. This layer should be strengthened under the external trim from the inside of the roof. When installing, it will be necessary to form a ventilation gap, the width of which is 5 cm. This will eliminate the effect of water on the ceiling finish if there is a high humidity in the room. Steam insulation and waterproofing of the roof must be laid with an overlap. This must be taken into account when cutting the material. One canvas must go to the other by 15 cm. The joints must be sealed securely with the help of building scotch tape. The design features of the system will allow to determine whether to perform one-sided or two-sided fastening.

Recommendations for the master

If you have a vapor barrier under the roof, before cutting, you need to take into account seasonal fluctuations in temperature and humidity, which will exert their influence on the layer. This indicates the need to fix the material without tension, the sagging should be 2 cm. In those areas where the vapor barrier will be adjacent to the walls or roof, a thorough sealing must be done. On the perimeter, everything should be well glued. When installing, you need to use a construction stapler, the brackets of which are installed in the elements of the rafters. Mounting should be carried out with the help of racks, this will eliminate the possibility of seepage of water into the insulation material.

Reviews about the vapor barrier "Tehnonikol"

Today, the steam insulation for the roofing "Technonikol" is common in the building materials market. Consumers speak about it very positively. According to professionals, as its distinctive feature is the ability to preserve properties, when external conditions are characterized by high humidity. Such a film shows its qualitative characteristics under the conditions of the Russian climate. This indicates that the material continues to perform its tasks over a wide range of temperatures, which varies from -40 to +80 degrees.

Reading the reviews, you will be able to understand that in the installation this material is very simple, its attachment can be made with nails with a wide hat, as well as a construction stapler. If you want to work in the space of insulated floors, then you need to put cloths on the walls for 25 cm, making a thorough sealing.

Conclusion

Installation of the roof insulation must be done strictly according to the technology. For example, special attention should be given to the tightness, especially in those places where the material is adjacent to penetrating elements. Among the latter, one can distinguish ventilation boxes, chimneys, etc. These rules must be taken into account and observed when carrying out the work, otherwise the means and forces will be wasted, and after a while the roof will require repair, which will be time-consuming and expensive. Specialists recommend, at least, to entrust the calculation to professionals.