Loss of tightness

It is impossible to make a film flooring without loss of tightness, there are always small breaks in the places of fastening of brackets, but this does not affect the overall tightness of the house. A small amount of moisture falling under the cover to evaporate under the influence of direct sunlight. Just as there is no fully sealed film cover, and there is no perfectly moisture -resistant roofing coating. Even in the most perfectly executed roof there are small gaps in which snow dust will be blown, but no more. Perfectly hermetic roofs do not exist, each coating passes a certain amount of moisture.