Hydro-and paroizolyatsionny films

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At daily difference of temperatures on the lower surface of a metal leaf condensate is formed. Besides, the evaporations rising from internal rooms of the house in cold air of subroofing space turns into water. Excess humidity leads to a heater namokaniye and therefore, to decrease in its heattechnical characteristics, frost penetration in a roof and education naledy on a roofing covering, to rotting of rafters and obreshetka, to emergence of a mold, damage of internal finishing of rooms. In order to avoid the similar phenomena it is necessary to use a heater of sufficient thickness, to protect it from condensate from a metal tile by means of a waterproofing film and from steam from rooms by means of a paroizolyatsionny film.