waterproofing membrane diffusion is used to ensure reliable waterproofing pitched roof. Waterproofing membrane is particularly relevant for small angles of inclination of the roof, when the roofing besides the main need to use an additional waterproofing layer -. Gidrobarer
There are several types Gidrobarer - a waterproofing membrane film and diffusion.
Waterproofing films are used for temporary structures, because their lifespan is only 5 years old. This is because the material from which the produced waterproofing roofing foil - polyethylene has a simple molecular structure, which eventually decomposes to temperature changes, mechanical vibrations, and the roof is most susceptible to temperature fluctuations: daytime solar radiation acts on the roof, which heats a roof, even in winter, and at night the roofing material, especially metal, cools rapidly. Such fluctuations cause delamination of polyethylene, resulting in unusable gidrobarer. Therefore, waterproofing tapes can not be used on roofs whose service is designed for 50-100 years.
For the pitched roof of permanent buildings should be applied waterproofing membranes that are made of composite polymer -polipropilena. polypropylene structure is composed of complex molecules that, when producing the membrane additionally held together by mechanical or thermal means, therefore, have a life span of 60-70 years.
The main difference diffusion waterproofing membranes is the ability good vapor permeability, which allows removal of the increased moisture from the roof space. Thus, the diffusion membrane not only protects the roof from moisture inside, but also support narmalno moisture balance, letting go of excessive moisture that has accumulated in the insulation and the wood out.
The diffusion waterproofing membrane consists of several layers. The basic working layer of the membrane is a "film" that acts as a molecular sieve -zaderzhivaet large water molecules and allows smaller molecules of water vapor. Work membrane layer is protected by additional layers that provide a "film" mechanical durability and protection against solar UV
Main characteristics of waterproofing diffusion membranes:.
density of from 100 to 220 g / m2, determines the strength of the membrane, the higher the score, the stronger the membrane;
vapor transmission rate of from 1000 to 3000 g / m2 / day, determines the ability to remove vapor outwardly;
diffusion coefficient Sd 0.02 to 50 m, the passage of steam determines the resistance, the smaller the better -Themes;
UV stability of from 1 to 12 months, determines the resistance to solar radiation
Application diffusion Ventia waterproofing membranes, Walther. , Eurovent, Dorken, Vaxo provide reliable waterproofing of the roof, allows you to remove moisture from the insulation, extends the life of roof systems.
