Foils are mainly used for roof and facade structures and their use in fall into several broad categ

Foils are mainly used for roof and facade structures and their use in fall into several broad categories. Each group film for certain tasks, rational combi ovens and different to each other in structure, material and technical characteristics.
Latvian market for the proposed construction films can be divided into four groups: the vapor barrier, wind, moisture barrier and diffusion membrane or film. All these types can also be found with us, building online store Būvserviss.lv. For each of the modes separately Read more on this blog.
One of the key values describing the film is its vapor transmission ability. This film is characterized by the ability to pass a certain amount of water vapor, such as 24 hours a 1 sqm area and a relative humidity of 85% at temperature plus 24 C degrees. A second important indicator of film characteristics is its tightness or film on its ability to maintain the surface of a given height of water column. In particular, this is an important indicator of wind and diffusion film. Film is also characterized by other values - the tensile strength of both longitudinal and transverse direction, film material, fire resistance and its weight in grams per square meter.
Metal roofs covering recommends using at least two or even three types of films. From inside the roof structure rational combi ovens heat insulating layer (rock wool, etc.) covered with a vapor barrier film over the wool, which is usually filling up to the top of the rafters, covered with wind-proof film (it covers the wool from the top). Both of these films are covered closely adhering to the wool, without gaps. Above the wind film-coated thermal barrier is recommended to create a small air gap (about 5 cm) and above the ventilation slots on the applied waterproofing membrane with anti-condensation layer.
It is important to know that "breathable" materials (in this case - wind-proof membrane) rational combi ovens roof ridge connects with overlap (not divide), but the "neelpojošie" (condensate film) during installation is not connected to the structure - there leaves a gap for the moisture that collects in the condensate film, a ventilation rational combi ovens gap to emerge in the field. rational combi ovens
Other types of roof coverings (concrete or clay tiles, rational combi ovens asphalt shingles, thatched roofs, etc.) that does not produce drastic changes in temperature and no increase in moisture content, using two types of films. Insulation materials (rock wool) on the inside cover with a vapor barrier film, but from the outside using diffusion barriers, which will provide both waterproofing and wind insulation. Is applied firmly attached to the cotton rational combi ovens layer and does not constitute a special vents in the diffusion film is "breathable". Flat roofs are mostly used only vapor barrier as film features provide other construction materials such as asphalt roller cover.
Traditionally, construction films used in wood-frame house construction and are committed to providing the substructure and the heat resistance of the materials to keep them dry. Usually the inside layer of insulation (rock wool) with a vapor barrier film, but from the outside - the wind insulating film. To strengthen the use of slats or staples, since the vapor barrier film between need glue, but wind the film can be applied on top of the laps.
In relation to the use of film professionals have observed quite a few errors. This especially applies to the roof structure "pie" building. Films are not properly chosen and cast into the wrong combinations. Each film for its own purpose, which should be explicitly clarified before the film acquisition. Need to know the correct film work, subject to the right side, namely, producers and imprinted advertising is usually on the top half of film, thus showing the film laid on a party structures. In imposing the wrong film, will give the opposite effect - vapor and moisture to escape from the planned right now will come husband and thermal structures. In this case, the roof or wall structure of capital will be repaired, and work started again.
Related Articles: The diffusion membrane. rational combi ovens Sheathing insulation film. Waterproof film. Vapor barrier film. Why Tyvek? External wall insulation rational combi ovens types. How to properly prepare for facade insulation? Common mistakes facade insulation. Certified insulation system - what is it? Underfloor heating.
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