Solving the problem of how the thermal insulation of the roof is performed, many do not suspect that today the waterproofing nudity films of the vapor -permeable performance are designed, first of all, to withstand a high indicator of moisture in the roof structure. These products are capable of the roof in excellently protect against atmospheric precipitation, while they have good ventilation.
Almost none of the roof coatings are considered so sealed as to resist the penetration of the drops of rain or snow flakes, especially when sharp gusts of wind are observed.
As a result, the waterproofing layer should be installed, moreover, additional, and this is expenses. But such a layer will not make it possible to penetrate atmospheric precipitation under the roofing space and an additional roof will be insulated.
Vapor -permeable films
This mission was taken over vapor -permeable films laid under the roof. These products, in addition to being considered waterproof, allow moisture perfectly evaporating, which comes out from the inside of the building, which means that in no way passing external moisture, the film freely passes water vapors.
Today there are various types of waterproofing films under the roof.
All of them are very different from each other, since they are characterized by a different indicator of vapor permeability.
The level of vapor permeability
To characterize this quality, there are two indicators, the first which consists in vapor permeability, showing how much steam grams through a meter of area per day passes.
The second, describes the same property and the lower the indicator has, the better the vapor permeability.
There are different films, among which are those that are not recommended to be laid directly on a hard flooring or heat -insulating material, when there is no ventilation gap under it, since the steam that rises from the inside of the structure cannot pass quickly through the film. He will only accumulate on its inside.
The air that enters the ventilation gap will dry such condensate, and the insulation, in turn, will not be exposed to moisture. Something similar happens in the cabins of bulldozers, so the spare parts for Hitachi will always help to solve any problem.
Similar materials:
In an effort to use the existing area of the house outside the city, many owners are trying to equip the attic.
The most common way of covering roofs is the device of roofs from metal tiles.
Most of the residential real estate in our country is not particularly characterized by effective thermal resistance, providing comfortable conditions in the room.
The building market for covering roofs offers a wide range of these products, which is able to satisfy the requests of even capricious buyers.