Flat roofs with reinforced concrete supporting structures. The design of the attic roof of a one-and-a-half-story house Flat roof of panel houses from the 80s material

Flat roofs are often used in the construction of modern high-rise buildings, administrative and industrial buildings, suburban construction. In the latter case, they are most popular when creating low-rise buildings or outbuildings.

Basic requirements for flat roofs

Increased roof strength is very important for regions with heavy snowfall. IN winter periods it will have to withstand significant stress as a result of the formation of a thick layer of ice and snow. This indicator is also very important in the case of creating a serviceable roof.

A flat roof must provide reliable protection from rain and melt water and have a sufficient slope so that precipitation does not linger on it.

The structure should not deteriorate under the influence severe frosts and the scorching rays of the sun, sudden temperature changes and heavy hail.

It should cope perfectly with the heat-insulating function.

All materials used in the construction of the roof must be fireproof.

Pros and cons of flat roofs

Pros:

Flat structures have a much smaller area than pitched structures, which allows for significant savings on materials and during construction and installation work.
A smaller area helps optimize costs.
The construction of such roofs can be completed in less time short time than with a pitched structure, since all the required materials can be placed in close proximity - literally at your feet.
Due to the same feature, maintenance and carrying out is simplified. repair work: their execution is smooth horizontal surface is greatly simplified.
On the roofs flat type It is convenient to carry out installation and necessary service work that requires the use of special equipment: solar panels, air conditioning systems, antennas, etc.
When creating a flat structure, you can get additional meters usable area and use them as a recreation area, sports ground, or arrange a flower bed or garden. Currently, it is possible to cover the roof with paving stones or paving slabs through the use of special technologies. Paved quality tiles roof combined with garden furniture, a green area, a gazebo will become ideal place for family holidays.

Minuses:

during heavy snowfalls, a snow mass will accumulate on the surface, which, when melting begins, often leads to the formation of leaks;
there is often a need to use gutters;
in the cold season there is a risk of internal drainage freezing;
the drainage system often becomes clogged;
mandatory requirement is mechanical cleaning surfaces from snow mass;
periodic monitoring of the condition of the insulation is necessary to prevent its moisture;
From time to time it is necessary to check the integrity of the coating.

Types of flat roofs

There are four main types flat designs:

Operated roofs

Their peculiarity is the need to create a rigid base - otherwise it will not be possible to maintain the integrity of the waterproofing layer. The base is a screed based on concrete or corrugated sheeting, which is necessary to create a certain slope for water drainage. The thermal insulation material used in constructing the roof in use will be subject to significant static and dynamic loads and must have a sufficient level of compressive strength. If the insulation is not very rigid, a cement screed will be required on top.

Unused roofs

When installing this type, there is no need to create a rigid base in order to lay waterproofing material. No need for rigid insulation. For further maintenance of the roof, bridges or ladders are installed, the function of which is to uniform distribution loads on the roofing surface. The construction of unused flat roofs will cost much less, but they will not last as long as exploited ones.

Traditional roofs

Structure traditional types roofing provides for the location of the layer waterproofing material above the thermal insulation. The base for the roof is a reinforced concrete slab, and water is drained from the roofing surface by creating an inclined screed made of expanded clay concrete.

Inversion roofs

Inversion type roofs have practically solved the problem of leaks - the main drawback of flat structures. In them, the thermal insulation is located above the waterproofing carpet, and not under it. This technique helps protect the layer of waterproofing material from the destructive effects of solar ultraviolet radiation, sudden temperature fluctuations, the process of freezing and subsequent thawing.

Compared to other types of roofing, inversion roofing is more durable.

In addition, it is distinguished by increased functionality: you can lay a lawn on it and make tiled laying. Optimal angle The slope of such roofs is considered to be from 3 to 5 degrees.

Device Features

The main subtleties of constructing flat roofs are as follows:

Vapor barrier is created using a bitumen-polymer membrane, fiberglass reinforced. Another option is to lay a vapor barrier film over the screed.
Along the edges of the roof there is a layer vapor barrier material is wound up vertically so that its height is more height insulation layer, after which the seams are sealed.
Insulation is laid over the vapor barrier (in the case of a traditional roof).
A protective carpet is laid over the insulation, which is made of waterproofing materials with a bitumen base.
If expanded clay is used as insulation, it must be made cement strainer. Waterproofing is laid on it in two layers.
When installing lightweight structures that do not require significant loads, it is necessary to glue a waterproofing sheet along the entire roof perimeter.

Installation

A flat roof cannot be installed strictly horizontally - it must be observed minimum slope at least 5 degrees. This requirement is due to the need to ensure the drainage of rainwater and snow from the roofing surface. Another important point: it is necessary that the slope be created not only by the coating, but mainly due to the correct implementation of expanded clay or slag bedding. Even if the slope angle reaches 10 degrees, this will not interfere with uniform laying thermal insulation material.

Lightweight flat roofs

When constructing such roofs, the work is divided into several stages.

As a result of the work done, a warm and fairly reliable flat-type roof is obtained: in cross-section, it resembles a multi-layer cake based on several components.

Hard roof installation

When creating floors of this type, expanded clay is best suited as a thermal insulation material. Minimum thickness its layer should be 10 cm. Above the laid expanded clay it is necessary to perform cement-sand screed thickness from 40 to 50 mm. To ensure greater strength, a reinforcing mesh is placed in its middle layer. This measure is necessary to maintain the integrity of the coating while people are on it during repair, maintenance work, etc. In addition, these roofs are optimally suited as a base for constructing a swimming pool or recreation area.

The production of beams of such structures is most often carried out on the basis of a metal channel, since parts made of wood will not withstand significant loads.

Another requirement when installing roofs in use is the sufficient thickness and strength of the walls of the house.

Methods for constructing flat structures

There are several main ways to create flat roofs:

By installation concrete slabs ceilings Such work can be completed in a fairly short time, but special lifting equipment will be required. Application this method involves the implementation of insulation. The material can be laid both inside and outside.
Using metal channels or I-beams, on top of which it is necessary to lay boards: their thickness should be 25-40 mm. A layer of expanded clay is poured on top, then a concrete screed is created.
The creation of the ceiling is carried out through monolithic concreting. This requires high-strength formwork with thick supports. The supports are fastened together using jumpers. This type of floor also needs to be insulated.
Using ceramic blocks large sizes: they are laid on top of metal beams. Such blocks replace wood flooring. The main advantage of this method is the use of ceramics, characterized by increased mechanical strength, resistant to moisture and having excellent sound and thermal insulation properties. Large ceramic blocks do not require additional insulation: when using them, you can limit yourself to such a measure as creating a concrete screed.

CONCLUSIONS:

Flat roofs are often used in the construction of modern multi-storey buildings, administrative and industrial buildings, in suburban construction.
Flat structures must have increased strength - especially if they fall out large quantity precipitation.
Flat roofs have a much smaller area than pitched roofs, which allows for significant savings on materials and during construction and installation work.
The main disadvantage of such roofs is that during heavy snowfalls, snow mass accumulates on the surface, often leading to the formation of leaks.
Flat roofs can be used, non-used, traditional and inverted.
Inversion type roofs have practically solved the problem of leaks - the main drawback of flat structures.
A flat roof cannot be installed strictly horizontally - a minimum slope of at least 5 degrees must be observed to allow precipitation to drain off.
The installation of flat roofs of lightweight construction is fundamentally different from the process of installing solid roofs.
Flat roofs can be created in several ways.

In the video you can see how to organize drainage from a flat roof using the non-combustible Rockwool insulation system.

Many of us live in standard panel “nine-story buildings,” of which a great many have been built since the seventies. At the same time, a very small number of people are interested in what exactly the building in which they live is, limiting their interests only to their apartment. And I have always been interested in how the ecosystem called “home” works.

As a child, I climbed into basements, walked from basement to basement through the windows of the heating main, looked with a flashlight into black windows overgrown with cobwebs, opened closed doors attic hatches. I was interested in everything. The structures, smells and sounds of the roofs and basements indicated that the house was not just apartments, but a whole complex of complex systems.

And in general, this complements and changes ideas about what a city is and what a person is.

So, today’s walk is on the roof of a nine-story building; the same one that I first climbed in 1995.

02. The last floor in the entrance looks like this. It has an unusually high ceiling and these welded metal stairs leading to the rooftop exit.

03. To the left of the elevator (directly above the entrance to the apartments) there is such a hatch. I believe it has something to do with the maintenance of elevator equipment.

04. We go up the metal ladder. It is very inconvenient - you can immediately see that it is not designed for everyday use.

05. The direct exit to the roof is covered with a sheet metal shield, which is screwed to the base using welded bolts and nuts screwed onto them. Carefully unscrew it (and after visiting the roof, carefully screw it back in).

06. We go up another flight of stairs. It's even more uncomfortable than the previous one.

07. And here we are at the top. The first thing that catches your eye is the ventilation “fungus” of the garbage chute shaft, as well as the concrete decorative elements that cover the entrance windows.

08. Let's look back. In 1995, this exit to the roof was closed not with a metal shield, but with such a thick wooden door on hinges (I think of blue color), covered with tin. You can even see the remains of her box there.

09. The block itself, from which we came out onto the roof, looks like this. In addition to the exit itself, it also houses an elevator room with elevator equipment machines.

10. Elevator ventilation window. The blocks here are finished with the same crushed stone as the entire house.

11. This one concrete structure in the foreground is the exit of the apartment ventilation. Have you seen such grates in your bathroom and kitchen? They lead to a ventilation shaft that ends on the roof with something like this. TV network wires are passed through the reinforcing rings of the shaft cover.

12. The inside of the mine looks like this. Pretty clean, by the way. There is also a very specific smell here. It smells like some old oil, something like cutlets, some kind of buckwheat - the smell of dozens of kitchens. I remembered this smell very well during my very first visit to the roof. At that time, by the way, the mines were dirtier and from there, along with the flows, warm air Some flakes were flying.

13. The entire roof and all surfaces on it are covered with this kind of roofing material for waterproofing. It is quite modern, grayish, and feels almost indestructible from temperature changes. When I was here for the first time, there was this old black roofing material lying here, swollen in places from the heat and cracked from the frost.

By the way, I don’t know what this block is in the center of the frame.

14. Water drain. They are located throughout the roof in such peculiar lowlands. Have you ever seen how, when it rains, water flows from such a bent pipe that looks out from the block under the first floor of a nine-story building? This pipe starts high on the roof with a drain like this.

14. But this metal tube is a cable channel brought out.

15. Now there is cable television in this house, but once there were large receiving antennas here, I remember them from my first visit to the roof.

Another cable channel, with parts of some kind of fastening equipment - maybe this is what the supporting straps of the antennas were attached to.

16. Some residents install satellite dishes on the roof, using the wall of such an elevation, formed due to the difference in height of different parts of the house. The elevation, by the way, is now covered with waterproofing, but I remember a time when there was just a bare wall here (it seems, even laid with brick for some reason), and a wooden ladder led from here to the higher part of the house.

17. View from the roof.

18. These wires on insulators are most likely the electrical network.

19. Some kind of metal structure at the exit from another entrance. I believe that these are the remains of a homemade antenna.

20. General form on the roof of the house. The artificial “lowland” of water drainage is clearly visible here.

21. Remains of some kind of cable. Most likely - part of the repair winch.

22. Isn’t it scary to walk on the roof? It's scary. The fence that seemed to me in childhood reliable protection, now it turned out to be very low and small.

23. And in some places these “railings” from the corner even end completely.

24. So let's look at the corner of the house and, perhaps, go down.

25. The most pleasant thing about walking on the rooftops is being back on the ground. Or even so - to end up on earth in the way that was originally planned :)

In some cases (for example, if a metal tile system is being installed on top of an old soft tiles) this is possible. However, it is necessary to understand that a damaged base can begin to rot and, thereby, provoke failure of the new layer. This is why we would not recommend laying new materials on top of old ones. It is better to remove the damaged building material and completely carry out the required work, as required by technology.

As practice shows, the overwhelming majority of roofs in ordinary private houses are built in such a way that there is no need to dismantle the roofing base to install an additional insulating layer. If we talk about multi-apartment buildings, then the situation is different: since in multi-storey buildings When fused coatings are used, insulation becomes impossible.

If there is damage to individual structural elements, then only these parts can be replaced. In this case, the area of damage should not exceed 35%. For larger problems, it is worthwhile to completely replace the rafter system.

Urgent repairs are required if there is a serious violation of the tightness of the coating: it may be necessary if part of the roof is torn off, water leaks during precipitation, peeling, rupture or swelling of the roofing material.

We provide the following warranty periods:

soft roof: 5 years
metal roofing: 3 years
roll and bitumen coatings: 3 years
polymer tiles and seam roofing: 6 years.

The warranty period depends on the type of work performed and is calculated when drawing up a repair plan. Data on warranty periods must be disclosed to the customer before the start of work and included in the contract.

Any leak is a problem that requires careful and timely repair. Firstly, it is important to correctly determine the cause of the leak. Secondly, when self-repair there is a risk of damaging serviceable elements located nearby. If you are not an expert in roofing work We recommend calling a specialist who will not only fix the problem, but also provide a guarantee for their services.

In order to accurately determine the cause of the appearance of water, an examination will be carried out by a specialist. You can independently determine what is causing the appearance of moisture using the following signs:

when a leak occurs in the roof, water begins to drip in the warm season after rain, and in the cold season during sunny weather and sudden warming.
When condensation accumulates, moisture appears constantly and is practically independent of weather conditions.

For an accurate diagnosis, we recommend calling a specialist who will accurately determine the cause and tell you what actions need to be taken next.