Roofing: Common mistakes and misconceptions

Often, choosing the original design of the roof or be tempted to economize on its device, the owners of cottages known to doom themselves to a multitude of problems and unexpected expenses. Sometimes out of ignorance, often - hoping to Russian "maybe." To avoid annoying disappointments, we explain the most common mistakes during the design, development and operation of the roof.

Draw ... and how to live?
Coming up with an original design of the roof with an abundance of towers of tiers, the customer often receives not only beautiful but also troubled the roof. Typically, these roofs have pockets of snow, which can not be found on the conventional gable roofs. The fact is that in areas adjacent to the towers, dormer windows and vertical hearing a little distance between them in the winter will certainly build up of snow. If the configuration of the main part of the roof also has gentle slopes (slope angle less than 30 degrees), then inevitably there is a delay of snow. Its weight can be critical for the roof structure is not designed for this load. Also in the spring, when the sun is active, the top layer of snow on the roof begins to melt, while the lower layers are transformed into ice. Melt water from the upper layer tends downwards, and the ice formed in the pocket, prevents this, and the water begins to flow in different directions, penetrated into the underlay and floor space, and as a consequence, causes rotting of wooden structures and even spoil the interior decoration. Most often, these leaks occur in the valley - places the conjugation of two planes inside. In addition, if the roof missing snegostopornye elements (lattice snegozaderzhivayuschie bracket), the melted snow will descend like an avalanche down the slope of the roof. It is fraught with the demolition of all spillway systems and can result in accidents and injuries.

Particular attention should be paid to attic windows in the design of multi-tiered roofs: they should not be located under the eaves upper tiers, as the icicles and snow ledges when falling from the top box may be damaged. In short, the simpler the shape of the roof, so it is safe and secure and the less necessary expenses for its maintenance and repair. If you decide to choose a complex configuration of the roof, then be prepared for the fact that the cost of its construction and operation will be considerably higher, as demand for its security.

How to hang in grams?
There is a widespread opinion that, choosing a lighter roofing, you can save on the carrier system. The view is somewhat erroneous, since the calculation of loads on the roof truss system is important to consider not only the weight of the roofing material, but also the peculiarities of the Russian winter snow. It should be understood that the spread of the weight of different roofing is very significant. The most difficult roofing material - natural tiles weighing about 45 kg / m 2, shingles - about 20 kg/m2, a roof of galvanized steel - about 10.7 kg/m2. At the same time on any roof in the winter period is up to 250 kg per 1 square meter of snow! Thus, the rafter system was originally to be calculated on the total load of winter: snow, plus the weight of the roof covering.

Choose the roof itself
Often, the customer self-studying various types of roofing materials and comes to the builders with a ready, not always the right decision. Options for solutions are best discussed with the designer. And even better - in addition to obtain professional advice builders and a company that planned to purchase materials for construction. In this case, you will be aware of the diversified characteristics of various materials that will help to navigate and select the desired.

Roof pie: you'll still save on stuffing? And quite in vain! Each roofing material suggests its roof construction, which is designed to provide absolute protection for your home. Otherwise, you will have to deal with leaks, mold, noise and other problems of irregular roof. Here to save - our own peril. All of the elements and characteristics necessary for this system provides a designer. For example, shingles involves a complex structure of the roof. It must necessarily be laid on a solid, smooth, rigid base. For this reason appear sparse crate and crate of solid double-edged boards, which fit waterproof material such as OSB (oriented strand board). This is due to use of shingles, which eventually welded into the carpet and if there is no rigid base, with a local roofing load starts to walk up and down, up to break the most tiles. Between the base and tile carpet underlayment is required, which protects the roof from driving rain and ice. To improve the water resistance of such weak points of the roof, as the valley, over the valley underlayment carpet laid carpet. Under the crate pave hydro vetroizolyatsionnuyu film (why?), Mineral wool insulation (what?) And the vapor barrier film (why?). Only under such a roof fillings you can sleep peacefully!

Has its own characteristics and metal roofing. If it is assumed under the living room, you should understand that any metal coating - a real "drum" and you are good you will hear the sound of rain and wind. Therefore, competent experts recommend that you include in the roof "pie" additional sound insulation, which will help in future to avoid problems with increased noise, and make your stay in the house more comfortable. Thus, the device proper roof - is a comprehensive system that ensures absolute safety and reliability in operation.

Condensate fungus friend
When designing a roof experts advise to pay attention to the compatibility of different kinds of roof structures, such as wood and metal. Metal construction should not simultaneously be in an area of ​​cold (for example, with a street-side) and in the warm zone (in the underlay area) as well as in winter conditions in this case a rather strong cold bridge. At a meeting of heat and cold on cold metal surfaces appears condensate (as well as for heating air in the bathroom on cold water pipes appear water droplets), and if they are not insulated, then under the roof of the formation of wet spots and mold. There is a fungus, which is then very difficult to withdraw. To a large extent it is dangerous for roof structures when under the roof is a warm space. That is why the metal structures should be either cold or warm and to be well heat insulated!

Caution - attic!
In recent years Russia has become fashionable to build the attic floor. Europe under attics lived for more than half a century, we are - about 10 years. Perhaps this explains a lot of errors in the construction of housing under the roof. The first common mistake occurs usually at the design stage. In project organizations either ignore the new materials that are used in the underlay area, or do not know them. This paropropuskayuschie, hydro and steam insulating materials that have already appeared on the market. Perhaps because of their high cost and in order to save the project often laid over cheap domestic materials that do not correspond to a specific microclimate attics - namely, glassine, which transmits the pair, although in very small quantities. However, this is enough moisture to accumulate in the designs, making wooden rafters and purlins are rotting and covered with mold, and all the accumulated moisture flowing inside the premises. A typical mistake is the lack of ventilation channels in the rafters of the attic that leads to excessive moisture in the underlay area. It is therefore not recommended for soft roof during the construction of attics, since there is no superimposed ridge, and hence no "prodyhov" - the possibility of air flow from the Cornice strip part through the ventilation ridge.

Expensive ventilation?
The fact that ventilation is necessary for all home construction, everyone knows, but on the device quality of ventilation (including roofs) often prefer to save. Remember, properly executed ventilation is the key to long life of the roof and is required for the following purposes: removal of moisture from the insulation and sheathing, preventing the formation of ice and icicles on the roof in winter, reducing the temperature inside the building during the summer. The air gap must be large enough (at least 50 mm), exhaust port have as high as possible, and the air intake, respectively, in the lower part of the roof.

Whom to entrust the construction?
Perhaps the most common mistake is still an invitation to "Wild" crews to save money. As a result, you have a roof with no air gaps, rotting crates, bloated coverage, etc. etc. The customer has already passed through it, understands that the work of civilian workers in the end is always more expensive.

What makes professional construction company from the "Wild" crew?
First, professional builders are constantly being trained, attend exhibitions, often share their experience with the leading companies engaged in construction and operation of roofing and waterproofing systems.
Secondly, professionals are constantly improving their skills and are always aware of all the innovations.
Thirdly and fourthly, that the presence of a building permit and adequate (does not mean cheap) price.

Cheaply you can get a costly problem. Most importantly a sign of professionalism - that the firm was not afraid to show their ready-made objects that are in operation.

And what are the guarantees?
Even if you have chosen a sensible way and asked the construction firm, should not relax. If you want to get a quality roof Take it seriously at the conclusion of the contract and it specified in its safeguards. Now under the law the warranty on the roofing job is 5 years, and conscientious builders indicate that the item in their contract. It is clear that if you hired a "Wild" gang, the question about any guarantees to go just can not. By the way, there are cases when the "wild gang" in the name of the newly created company, enters into a contract, where the registers all the guarantees. But by the end of construction season the company rose and demand from her performance warranty is simply unrealistic. So you should pay attention to the period of existence of firms in the construction market. Say, three years - this is a good "age".

The rules of courtship: done and forgotten.
Buying an expensive car, you realize that its operation is the need to service, oil changes, filters, etc. Also the roofing system - will work with high quality and reliable, if it be given due attention, especially in autumn, winter and spring. The roof of a complex configuration requires more attention.

There are a number of activities that must be met:

, Sewer cleaning, especially if the home is worth in the forest zone, where leaves and needles, settling, trapped in the drain system;
-Cleaning gutters from snow and ice, because these places are blown by the wind and warm air, the snow rapidly melts and freezes; formed icicles;
-Cleaning eaves of snow sheds;
-Cleaning of roof windows, valley, etc.

Incidentally, some companies offer their customers sign a contract for the operation of the roof. The price of such works is determined by labor costs for a specific roof and with the cost of the roofing system is not connected. For example, the operation of the roof area of ​​500 sq.m. during the winter costs from 20 to 30 thousand rubles. Contract is made by the parties for a single output. It specifies a list of works and their cost. Work carried out according to their needs. For example, if this winter was almost snow-free, then exit to the roof is not required.

Source: TSC Sakses