The subject of the article is how to cover a flat roof. In it we will tell about the materials that today are used as roofing for flat roofs, about their characteristics and methods of installation.
There are two tendencies of arrangement of roof structures: pitched and flat. The former are mainly used in the northern regions, the latter in the south. The reason - the snow that overloads the roof.
In Russia, flat structures were not always used. With the advent of new technologies in civil and industrial construction, flat roofs began to be used in the construction of industrial facilities and apartment buildings. In private housing they were not used at all. But trends are changing even in the construction industry. Especially with the advent of new building materials. Plus, fashion, which, as practice shows, has always been the engine of scientific and technological progress.
So, the main advantage of flat roofing structures is cheapness and simplicity. Of course, in comparison with pitched roofs. For example, on the pitched usually goes from 20 to 50% of the total construction budget. On flat - up to 10%, because the costs here are minimal, and they include hardening the ceiling of the house, its insulation and waterproofing.
We turn to roofing materials for flat roofs (types and prices). There are two main materials that I use today, and one non-standard approach, but no less effective.
Fusing roof . This is a rolled product, which is based on fiberglass or fiberglass, covered on both sides with bitumen-polymer composition, and on the upper side with additional stone chips. The latter protects the roofing material from the harmful effects of sunlight.
Mastic pouring materials that create a seamless monolithic coating on the surface of a flat roof. In fact, it is a bitumen-polymer mastic applied to the roof surface and polymerized in air.
Non-standard flat roof covering - profiled.
This flat roofing technology has become a new alternative to ruberoid coatings that have a lifespan of no more than 5-7 years. Rolled material coated with a bitumen-polymer composition, is guaranteed to serve at least 30 years, if you exactly follow the rules and requirements of its installation.
Today, manufacturers are moving further towards improving the characteristics of built-up roofs. For example, the company TechnoNIKOL offers material based on atactic polypropylene, which experts call artificial plastic. And as the impregnation used styrene-butaiene-styrene (SBS), which is called artificial rubber. This waterproofing material easily tolerates low temperatures, which is very important when using it in the northern regions of the country, where it has already shown itself only from the positive side.
Soft roof (built-up) is used not only to cover flat roofs, but also for pitched roofs. This technology has already been developed and is actively used in private housing construction.
This type of roofing material fits only flat surface without large plane drops. Therefore, before carrying out the main stage of forming the roofing structure, the preparation is carried out:
the flat roof surface is cleaned of debris and dust, oil stains are removed by degreasing or by grinding the concrete base, removing rust ;
area defects repair , remove drops;
process the plane with a bitumen primer;
lay lining material , which finally aligns the plane of the roof, and additionally performs the functions of a vapor barrier.
Now the overlaying roof is laid on the prepared surface. This is done by heating the material on the back side, which is laid and leveled with a special metal roller.
On our site you can familiarize yourself with the most popular in Moscow suburbs for the construction of a country house . In filters you can set the desired direction, the presence of gas, water, electricity and other communications.
It should be noted that this roofing material for a flat roof is the cheapest in its category. But the price range is quite impressive, because the cost component depends on the raw materials used.The table shows several varieties of this roofing, which shows the distinctive features and prices.
|Mark||Specifications||Price, rub. / m²|
|TechnoNIKOL|| Base - polyester. |
Outer coating - slate.
|TechnoNIKOL|| Base-polyester. |
Outer dressing - basalt crumb.
|TechnoNIKOL|| Basis - fiberglass. |
Dusting - basalt crumb.
|Technoelast|| The base is polyester. |
Sprinkle - slate.
|Technoelast|| The base is fiberglass. |
Sprinkle - slate.
|Technoelastic|| The base is polyester. |
Outer coating - polyester.
|Technoelast|| Basis - fiberglass. |
Outer coating - polyester.
As you can see, the variety is quite wide, and this is not the whole range. Accordingly, prices for different models are very different from each other.
There is a novelty in this category, which is called a membrane roof. This is a plastic mesh reinforced product filled with polymeric resins and synthetic rubber. This is the so-called EPDM membrane. Their price is 320 rubles. / m² In addition, manufacturers offer other types of membrane materials:
TPO-membranes based on thermoplastics (olefins and polypropylene), the price is 70 rubles. / m²;
PVC membranes with a price of 55 rubles. / m²
It should be noted that EPDM membranes have a service life of 50 years. Manufacturers produce them with a width of 0.9 to 9 m. In comparison with the roofing overlay, the width of the rolls is 1 m. That is, the membrane version is much more convenient to lay on flat roofs in terms of larger coverage with one web, which reduces the number of joints. At the same time for fixing does not use open fire, which simplifies the installation process.
The video shows how to properly lay the membrane roof, how it should be fixed, which fasteners are used for this:
It can be interesting! In the article the following link read about roof repair in Moscow: prices for roof roof repair .
Mastic, they also have non-roll roofing presented on the market in three varieties:
bitumen mastic :
bitumen-latex emulsion .
Fibrous materials that perform the functions of a reinforcement cage must be added to the first two. In the third add latex and coagulator. It should be noted that mastic materials are applied only on the prepared surface, which is covered with fiberglass or fiberglass. The last two materials are attached to the concrete base with cold bitumen mastic.
It should be noted that often in the process of repairing flat roofs, the lining carpet is not laid if the old roll covering has a good technical condition. Mastics simply put on the surface being repaired with a layer within 2-3 mm. And it is enough to talk about the complete sealing of the roof structure.
The list of advantages of a mastic roof includes the following:
increased elasticity applied coating;
one hundred percent waterproofing ;
range temperature operation from -50С to + 120С;
increased strength and wear resistance;
seamless application technology;
simplicity and speed of the installation process.
The only difficulty is to distribute the mastic evenly with the same thickness over the treated surface. This requires experience and skills.
And recommendations for applying this material for a flat roof:
you can not pour on uneven base;
if the roof is wet ;
in rainy weather.
The video shows how mastic material is put on a flat roof:
It may be interesting! In the article the following link read about the cost of roof insulation works from the inside of the mineral wool - price per m² in Moscow .
And the last is the price. It should be noted that many manufacturers are engaged in the production of mastic to cover flat roofing structures. They use different components, hence the different price of the product. Here are a few options:
mastic TechnoNIKOL bitumen-rubber - a 20 kg bucket costs 1600 rubles.;
the same material of the brand AquaMast - 1,100 rubles. 1 can with a capacity of 18 kg;
mastic BRIT roofing - 80 rubles. / kg;
mastic bitumen-polymer I - 600 rub. / m²
Profiled sheets, as a coating for flat roofs, are used infrequently. But besides them, other roofing sheets of sheet or panel type on flat roofs do not apply. The reason is the length of the profiled sheet, with a maximum value of 13 m. That is, one sheet can be laid on the roof, not caring that the roof structure will be closed leaking. After all, any joint is a place through which time will begin to flow. This does not apply to longitudinal seams, because the profiled flooring is overlapped in a single wave. And this is a hundred percent guarantee.
As for the installation of corrugated flooring on a flat roof, it is no different from the same process on pitched roofs. Under the roofing material should be laid crate, which is attached to the concrete base with anchors. This method of roof formation has proven itself well in the formation of insulated roofs. That is, insulation is placed between the elements of the sheathing, and already above the profiled sheets.
In this case, the pitch of the batten will depend on the thickness of the sheet and the size of its waves. And the more parameters are both, the greater the installation step.
It might be interesting! In the article on the following link read about insulation of the facade of a private house: necessity, choice of materials, facing .
So, all materials were considered. It remains to answer the question, the better to cover a flat concrete roof. Probably, it is not worth putting the question so drastically. After all, each material and method of coating flat roofs has its advantages and disadvantages. For example, the built-up roof is the cheapest. But the process of its installation requires a propane tank and open flame.
Mastic modifications are easy to use. They are simply applied to the surface in a thin layer. And this is enough to talk about one hundred percent isolation. And after all, this is what everyone strives for, covering roofs with roofing materials. But among the three proposed options mastic the most expensive.
Profiled sheeting can also be categorized as low-cost options. He is no more expensive mastic. But its installation requires additional elements: obreshetki, screws. At the same time, the process of fastening profiled sheets is associated with some rather stringent requirements:
twist fasteners perpendicular to the plane of the roofing material;
clamping or underfilling fasteners can not be, a hole with a low tightness can form, and this is the probability of leakage;
profiled sheeting produce into the lower wave .
But we must pay tribute to the fact that the decking is a durable material with a long service life, especially for sheets coated with a polymer layer. You can walk on it without problems, without fear of damaging the coating. In this regard, other materials on wear resistance will not yield. But it all depends on the intensity of walking. For example, mastic materials do not like mechanical loads.
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So, we have dealt with the roofing materials that flat roofs cover today. Their range is not as wide as for pitched structures, but there are options, as you could see, on the market. What to choose, everyone decides for himself. The only advice is to consult with experts who can recommend coverage considering the operational loads acting on the roof of your house.