"Hole" in a roof it is normal!

At all very observant people are capable to notice, that practically on any roof there are the apertures which are required for pass various communications. Among them - ventilating mines, chimneys, antenna etc. For the builder and the owner of the house unfamiliar with new materials, appeared in the building market, work on hermetic sealing of places of an adjunction always was a problem.
Hermetic sealing of similar passes is made, as a rule, various by "adjunction laths» and-or hermetic sealing by bitumen which under theinfluence of solar radiation, deposits, fluctuations of temperature and other factors starts to lose in due course the germetiziruyuschie properties and consequently the pass knot through a roof starts to flow.
The Finnish company SK_Toute has developed a number of the goods for the decision of the given uneasy problem under general trade mark VILPE VENT. The basic feature of all goods VILPE is the availability of a so-called element through passage which steals up depending on type of roofing cover. For today already there are elements through passage for a natural tile of type BRAAS; metal tiles of any type, including profilirovannyiy sheet; smooth metal sheet; a soft roof. All elements are delivered in six most popular colours for roofing materials.
Let’s dwell upon some of elements through passage.

EXITS OF KITCHEN EXTRACTS AND VENTILATING SYSTEMS

Are applied on the objects having ventilating system, or in places of an exit of a kitchen extract. Their basic dignity is that air from premises is removed to a roof, and on walls (in case of a conclusion of fulfilled air in an aperture in a facade) is not besieged neither a dust, nor fat. And possible smells, for example, from the same kitchen in any way do not disturb tenants of the house.
The exit consists of a metal pipe in diameter 125, 160, 200 or 250 mm, isolated poliuretanom and in a plastic casing. The exit is supplied by a cap-deflektorom. The warming used at installation, is necessary for prevention in a cold season of formation of a condensate on an internal surface of a ventilating pipe and accordingly hits of this in a premise. The cap here serves as protection against deposits and thanks to design features strengthens draught of air.
Use of these exits as elements of natural ventilation of premises can result and in unexpected results. For example, at an unsuccessful arrangement of an exit on a roof (when the cap of an exit below the fad, and at a wind blowing from an opposite slope, ventilation can not be at all or, that is even worse, the exit can begin podsasyivat air in a premise). That it did not occur, it is necessary to use, for example, the channel fan.

KRYISHNYIE FANS

They are outwardly very similar to an extract exit, only here the fan is established in the cap. Such design is as much as possible silent as the basic source of a sound is born on the street, some models are in addition equipped built in shumopoglotitelyami. These fans allow to ventilate objects of the most different profile: the private house, small cafe or production, warehouses, office spaces etc. Capacity of the fan - to 1500 m3 air at an o’clock. Installation on a roof is carried out as much as possible conveniently and fast thanks to standard elements through passage, practically on any roofing cover. The colour scale of a roof is saved also.
VENTILATION OF THE SEWER DRAIN
If in the house there is a bathroom ventilation of a sewer strut is obligatory. It is necessary to notice, that many do not muse of it. And further face very unpleasant problems. So, in particular, in water drain system gases that are formed at decomposition of fossils accumulate. At use of a toilet bowl the water shutter does not rescue, and unpleasant smells get to a premise, that essentially complicates a life of tenants. Installation of an exit on a roof is simply necessary for ventilation of a sewer strut. It is elementary simple and absolutely easy under expenses. As well as all previous goods VILPE, this model also it is delivered in different colour scores.

VENTILATION PODKROVELNOGO OF SPACE

Often it is necessary to hear, that as if this or that roofing material is bad, that, having staid only one season, it starts to flow. Thereof professional teams of roofers, by some estimations, block to 40-50 % of total amount of the roofs which have staid one or two years. It occurs because all of them have been made without technology strict observance. An old roofing material practically always throw out and lay other. The customer as a result loses the big money, simply speaking pays for a roof twice. It occurs from desire to save on installation and the roof project. And even more often, having heard, that, having paid for a roofing material, say, 2 thousand dollars, it is necessary to give 100-200 more for ventilation podkrovelnogo spaces from any illusive condensate, they refuse superfluous expenditure. As a result pay incommensurably more. It concerns not only ventilation podkrovelnogo spaces, but also paroizolyatsii, a waterproofing and other things "unnecessary" from the point of view of the client.

SO FOR WHAT ROOF VENTILATION IS NECESSARY?

As it has been told above, for removal of a condensate from podkrovelnogo spaces. In a heater and in air always there are steams of the moisture accumulated in not aired roof, and also condensed on cold surfaces (for example, a metal tile). The moisture in a heater reduces teploizolyatsionnyie properties of a material: the more a moisture, the heat conductivity accordingly there is more. The moisture also promotes reproduction of putrefactive bacteria and a mould on wooden designs that conducts to reduction of bearing ability and the subsequent destruction of a roof. But all these problems are shown not at once, and only in due course.
The moisture in the most roofing material (for example, in a natural tile) or in direct contact to it is very dangerous. In the winter the moisture freezes, thus increasing in volume, and the repeated cycle of freezing and thawing during thaw can lead otsloeniyu a soft roofing material and to occurrence of leakings. The natural tile, having become impregnated with a moisture, during frosts can be scattered simply. The condensate on an internal surface of a metal tile, getting on its scratches inevitably arising during transportation and installation, conducts to occurrence of the centres of corrosion. The rust is imperceptible from the street party, and it is even more dangerous, as often it is not possible to prevent through corrosion in time.
Installation of gates on a roof decides also this problem. For roofs with a corner of an inclination more than 25 degrees are used the flat gates practically imperceptible on a roof. For more flat roofs gates in the form of a low pipe (300 mm) are used. They serve for protection from zasyipaniya as their snow. But thanks to conformity of colours of an exit and a roof they also do not spoil appearance of a roof.
Normal ventilation of a roof promotes an air flow through apertures in svese to a roof. To supply the big ventilating area, and not just between two rafters, use kontrobreshetku, doing podkrovelnoe space uniform, without partitions.
Sometimes it is possible to hear opinion that before a roof did both of iron, and from slate without any ventilation, and there are they for 30-50 years. We will notice, that old roofs were done just with allowance for the maximum ventilation. In them there is heater and various parogidroizolyatsionnyih no films and accordingly the narrow closed space under a roofing material. All attic (by the way, it is frequent with skylights for the same ventilation) becomes as though ventilated space, and very big on volume. Thus, categorically to refer that did earlier and that was good, it is not necessary.

In end it is possible to notice, that the modern roof made without the competent design decision: without paro - waterproofings and without elements harmoniously combined with a roofing material through passage and exits, it is unnatural and short-lived. It can not only lose aesthetic qualities, but also to become rather short-lived.A.B. VASILEV Source: "the Building Season" #22 (2002)

It is introduced: on June, 28th, 2002

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