The price for the work on the seam roof. Metal seam roofing Roofing with seam roofing

Choosing a roof is no easy task. Among other options, you will probably be offered to consider the option of a seam roof device. About what it represents - in our material.

Seam roofing is a roofing made of galvanized sheet or rolled steel, as well as steel with a polymer coating, in which the connection of individual elements of the coating is made using folds.

Falz- this is a type of seam when connecting sheets of metal roofing.

Fold types:

A - recumbent single;

B - recumbent double;

B - standing single;

G - standing double.

The most hermetic and moisture-proof, according to experts, is a double standing seam. This is a longitudinal connection protruding above the roof plane between two adjacent roofing patterns, the edges of which have a double bend. A picture is an element of a roof covering whose edges are prepared for a seam connection.

Advantages of seam roofing:

The possibility of long-term operation (depending on the material, from 25 to 100 years);
Anti-corrosion coating;
Variety of colors;
Lightness (1 m2 weighs from 3.5 to 7.5 kg) - a small load on the supporting structure;
The smooth surface allows rainwater to drain much faster.

Disadvantages of seam roofing:

When it rains, a strong noise is heard from the impact of drops on the roof;
There are very few specialists on the market who can properly install seam roofing;
Ordinary galvanized steel is inferior in aesthetic parameters to many other types of roofing. Copper and zinc-titanium roofing looks much nicer, but it is much more expensive (if a square meter of usable area of a galvanized roof will cost $5-10, then copper - $60-80, zinc-titanium - $50-70);
The installation of a seam roof made of zinc-titanium requires a very careful attitude. You can’t walk on the material, knock - deep scratches on the sheet will subsequently lead to the development of premature corrosion. It is incompatible with many metals, and even with some types of wood (oak, larch). At temperatures below +5 degrees, the alloy becomes brittle and it is not recommended to continue working with it at such a time;
Accumulates electrostatic current. It is necessary to equip a lightning rod.

Metals used for seam roofing:

Galvanized roofing steel. Due to the zinc coating, they have high anti-corrosion properties. When mounting the roof, sheets with a thickness of 0.45 to 0.70 cm are used. The service life is 25-30 years.
Steel with polymer coatings. Polymer coated galvanized steel sheet has a multi-layer structure: steel sheet, zinc layer, primer layer, and finally, protective paint on the bottom side of the sheet, and a color polymer layer on the front side. The polymer is applied to give additional protective properties (UV protection), and also performs a decorative function.
Copper. Is issued in rolls. The texture of roofing copper can be varied: imitation of tiles, masonry, etc. According to its properties, copper is easy to solder, which greatly facilitates installation and makes the roof more reliable in operation. Service life - 100 and more years.
Aluminum. Roofs made of this metal are durable and will serve you up to 80 years. Resistant to temperature extremes, therefore not subject to deformation.
Zinc-titanium alloy. Produced in the form of sheets or tapes. It is based on modified zinc, which is characterized by ductility and corrosion resistance due to the addition of titanium, aluminum and copper. It is necessary to mount a roof from this material at a temperature above +5 °. Service life - up to 100 years.

Seam roof installation

Installation of a sheet steel roof is carried out in two stages:

First stage

Paintings are made for ordinary covering of roof slopes, cornice overhangs, wall gutters, gutters. For the manufacture of seam roof paintings, first, blanks of the required shapes and sizes are made right at the construction site (according to the drawings of the future roof). Steel sheets are marked on parts with the help of measuring instruments and tools, marks are made on the metal. Then the steel sheet, depending on the thickness, is cut and folded into pictures, the length of the slope, the side edges are bent, i.e. make blanks for making standing folds.

Second phase

Seam paintings are raised to the roof and their sides are connected to each other with a standing seam (most often single). To increase the tightness of the joints, make sure that the workers use self-adhesive tape.

Then the pictures of the folded roof are attached to the crate with narrow steel strips - kleimers, which at one end lead into the standing folds when they are bent, and with the other they are attached to the crate beam. Thus, a high-quality roofing is obtained, without any technological holes. Used connecting parts, such as nails, bolts, wire, clamps, must be made of galvanized steel. This is done so that they have the same service life as the roofing.

Openings at chimneys and gas pipes, including ventilation ones, are covered with aprons made of galvanized steel.

The procedure for the installation of vertical folds of ordinary roofing sheets

One edge of the laid sheet is fixed with fasteners (clamps) to the crate. Fasteners are located along the edge of the sheet at intervals of up to 600 mm and are attached to the crate with galvanized self-tapping screws 4.8x28 mm.

When using sheets longer than 10 m for roofing, it is necessary to fix them to the crate with floating clamps, which ensure the tightness of the roof in case of temperature deformations.

Technical solutions for the installation of horizontal joints in roofs with different slopes

a) with a slope of 30°

b) with a slope of 25°

c) with a slope of 10°

d) with a slope of 7°

rolled seam roof manufacturing technology. The material delivered to the construction site in rolls is cut using special equipment. Roofing on site avoids horizontal seams through which water can flow. The connection of roofing paintings is carried out, as a rule, in a double standing seam. To ensure complete impermeability of the joints, the seam can be sealed with silicone sealant.

Advantages of roll technology:

Ability to manufacture and install roofing sheets of almost any length (up to 100m or more)
Roof material can be profiled with a mobile rolling mill directly on the construction site
Joining sheets with a double standing seam without transverse joints
Hardware-free fastening to any crate with hidden clamps, which guarantees complete tightness of the roof and the absence of corrosion at the joints

Important points when installing a seam roof:

It is desirable to take these points into account, regardless of which technology is chosen.

The recommended slope of the roof when using folding technologies is more than 14°. For smaller roof slopes (from 7° to 14°), be sure to arrange a solid base, as well as the use of a double seam sealed with silicone sealant.
Seam roofs can be installed either on a crate, which is built from bars (usually 50x50 mm) with a certain pitch (usually 25 cm), or on a solid base. If the required step is not observed, a deflection of the steel sheets may occur, which will lead to weakening, and in the future - deformation of the seams between the sheets of metal. This, in turn, often causes leaks and corrosion of the metal.
It is recommended to use sheets up to 10 m long. For longer lengths, floating clamps must be used.
If you buy roofing in rolls, make sure that the sheets are of the same thickness. Be sure to ask the seller for a certificate that will indicate the technical characteristics of the material.
If you are installing zinc-titanium roofing, make sure that the builders handle the sheets carefully: the material must not be thrown, scratched, markers or pencils must be used when marking. Deep scratches encourage corrosion even before the patination process. When working with zinc-titanium, special roofing tools are required: marking devices, hammers, a set of bending pliers, straight and shaped scissors.

If you properly install the roofing material, make sure that the folds are hermetically connected, and you provide it with proper care, such a roof will last you for many years.

Attention! The prices are outdated. The article shows prices for 2012.

Seam roofs have a huge range in price. Since the seam is not a material, but a technology. The material can be anything - budget (galvanized), elite (copper), intermediate options. Consider what it is, profitable or unprofitable, what is the price per m2 of seam roofing and how much it justifies itself.

What is a fake?

A fold is a connection of two sheets of metal, in which the edges are bent together in one direction once (single fold) or twice (double). The double fold is more reliable and airtight; in all critical places (horse, knots) they perform it.

The seam is formed in two steps: folding the fold (if you are working with sheet / roll material, and not with the finished picture) and crimping.

An electric machine does everything in one go.

Two or more sheets, which are connected on the ground and in this form are raised to the roof, are called a picture. Pictures are also called blanks with already folded edges. Some materials (galvanization, copper) are not sold in sheets, but in rolls: on a small roof, the picture may not have a single fold, the slope is covered with a single strip along its entire length. Locks will only be on the connection of the pictures with each other.

The fold can be standing or lying (the lock is bent parallel to the sheet). Horizontal strips of metal are connected by recumbents, the lock looks down, along the weir line. Perpendicular to the ridge (along the slope) make standing. There are also paintings with self-locking folds, they are connected to each other according to the tongue / groove principle.

Advantages and disadvantages of seam roofs

Benefits of a seam roof:

low weight due to the small thickness of the metal (usually within 0.8 mm).
due to the small thickness - flexibility, the ability to cover, including curved roofs;
water resistance: the rebate is more airtight than fastening with hardware.

the roof is more susceptible to mechanical damage than metal profile coatings;
disadvantages of any metal roof: thermal conductivity, lack of sound insulation, electrical conductivity, electrostatics, the roof heats up in the heat;
snow retainers are required: due to the smooth surface, an avalanche of snow is possible.

Durability and cost cannot be attributed to either advantages or disadvantages: they depend on the material. The more expensive the material, the more durable the roof: simple galvanizing lasts no more than 10-15 years, copper and zinc-titanium - more than half a century. They look the prettiest of all.

Basic rules for the installation of a seam roof

Roofing can be laid on a continuous or sparse crate. In the second case, the calculated step must be carefully observed so that the coating does not sag. For the manufacture of sparse crates are used:

timber 5 by 5 cm, conifers impregnated with an antiseptic, humidity not more than 12%;
board 3.2 by 10, similarly;
metal profile with anti-corrosion coating (preferably used for pictures with self-locking folds).

If the crate is continuous, the vapor-diffusion film is placed on top of it, directly under the coating. If sparse - then under it.

In the presence of a heater, the structure of the cake is as follows:

heat-insulating material (fits between the rafter legs);
counterlattice;
waterproofing membrane;
crate.

Our work

The price of metal for seam roofing

Approximate cost of material in Moscow:

simple galvanizing, sheet 1 by 2 meters - from 400 rubles, service life 10-15 years;
galvanized with a polymer coating lasts 15-30 years, depending on the polymer. The price is proportional to the durability. Polyester - from 400 per square meter;
purex - from 500;
pural - from 600;
aluminum - from 1.5 thousand per square, lasts up to 50 years (guarantee - 40);
zinc-titanium from 3 thousand per square, lasts up to a century;
copper - from 3 thousand to 150 years.

Prices are for sheet and roll materials. Metal for seam roofing can be sold in the form of blanks with an already bent edge. In this case, the price is not much higher. But the cost depends heavily on the manufacturer. 400-600 rubles for steel with a polymer coating is the price of Russian brands. Imported is 2 times more expensive. For example, pictures with self-locking folds from Ruukki polyester cost from 900 rubles per square, pural - from a thousand.

It should be noted that the purchase of expensive metals for the roof justifies itself: they are almost eternal, because they are not afraid of corrosion. From interaction with air and water, a patina forms on the surface. It does not reduce the strength of the material (as, for example, iron oxide), but, on the contrary, prolongs it: the patina layer reliably protects the sheets from corrosion. And it looks noble.

As for steel roofs, they, alas, do not last forever. With simple galvanizing, resistance to external factors decreases as the zinc is washed off.

To extend the service life, the roof is regularly painted with oil paint (at least once every 2-3 years). Non-galvanized metal on roofs (and in general for street work) cannot be used. Polymer-coated steel is more reliable than simple galvanizing, but the coating itself is very capricious. It is easy to scratch it during installation, and if you do not immediately paint over the scratch with polymer paint, corrosion will begin to develop at the site of damage.

For comparison, other popular roofing coatings should be mentioned.

A metal tile costs on average about 300 rubles per square, the service life is up to half a century.

She also has a polymer coating, but there are advantages over a seam roof:

well ventilated, less affected by condensation;
mechanically stronger: profile waves serve as additional stiffeners.

Flexible tiles also cost about 300 rubles. Serves depending on the brand and model from 20 to 50 years. Absolutely sealed. There are no disadvantages of metals: heat / sound / electrical conductivity. You can’t cover a curved roof with a metal tile, but you can with a flexible one. Unlike seam roofing (roof slope 7-30 degrees, optimal - 10-15), bituminous tiles can cover slopes of any steepness, up to negative surfaces.

Ceramic tiles do not apply to budgetary coatings, from 1000 rubles. The service life is practically unlimited: in Europe there are houses with ceramic roofs built two centuries ago and older. But, unlike all of the listed roofs, ceramics are heavy. A reinforced truss system is needed.

The price for the work of the seam roof

“The most important thing is the weather in the house” - this applies not only to relationships within the family, this phrase is not without a direct meaning. A lot depends on what the “head” of your house is covered with and how comfortable the climatic conditions are. To do this, it is very important to choose the right roof covering, the type and type of roofing, the material from which it is made, a quality manufacturer, as well as structures that fit the chosen type of roofing, and much more. The concept of "roof" includes a huge number of details and nuances. And this article will help you figure out what a “modern high-quality coating” is.

Why is seam roofing so popular now?

Fold - a type of seam, with which the connection of sheets of metal roofing is performed. Seam type of roofing is the most modernized and durable way to protect your home from the negative impact of any weather conditions. Tightness, strength, the possibility of using various mounting technologies, materials, a modern fastening system, the guaranteed absence of any through holes are the distinguishing features of this type of roof.

Varieties

Copper seam roof

This type of roof has its own varieties, depending directly on the material. The most elite type msingle seam roof.

Copper as a material has its own properties that characterize it, such as high mechanical strength, respectively, suitability for machining, and thanks to the chemical process of "auto-extinguishing" corrosion, copper sheets have such qualities as durability (at least 150 years!). That is why seam roofing made of rolled copper is considered to be a premium class coating.

aluminum roof

Of course, in terms of durability, aluminum is practically not inferior to copper. folding aluminum- one of the new trends in the field of roofing materials. In relation to copper, this is a more affordable option. Features of such a coating are lightness, relative strength, resistance to corrosion. A huge choice of colors thanks to the enamel coating is exactly what will help emphasize the individuality of your building.

Seam roofing made of titanium-zinc

Titanium zinc - material that is durable and flexible. But at the same time, it is not as "compliant" as the above materials: due to its capriciousness, titanium-zinc can be quite unpredictable in the winter. What it has in common with copper is that it has a patina in use that makes it almost as durable and noble as copper. And the exceptional aesthetic appearance will satisfy any preferences of the most capricious customers.

Enameled galvanized iron

However, in spite of everything, galvanized iron was and remains the most common material for folding. Why? Firstly, of course, due to its low cost compared to other materials. Secondly, because of the galvanization, the roof has good reflective properties and protection against overheating.

But do not forget about the shortcomings of iron - poor sound insulation and a shorter service life - up to 50 years (corrosion processes are still inevitable).

"Pros" and "cons" of seam roofing

In addition to reliability, tightness, strength, a modernized fastening system and high quality, the seam coating has many advantages, and in addition to the above:

Light weight material. This is very important, because this fact allows you to apply almost any type of design, including the simplest ones, which can save you a lot of money;
Materials due to their chemical properties are not combustible. And this is a huge plus for security for you and your property;
Smooth roof surface. Smoothness allows water to drain quickly and locally without lingering;
High flexibility and ductility of metal compared to other roofing materials. Makes it possible to cover roofs of absolutely any shape;
Relative ease of repair;
Fairly long service life– approximately from 20 to 150 years;
Wide range of coating colors;
Anti-corrosion coating;
This type of roof Suitable for both ventilated and non-ventilated floors and for absolutely any type of foundation;
Huge range of widths and lengths panels;
Immediate the production of materials takes place either at the factory or at the roofing site from long products thanks to the use of ultra-modern portable equipment;
The presence of a ventilation system, snow retention, drainage;
Quick and fairly easy installation this type of roof.

Well, and, of course, as in every type of construction work, there are shortcomings in the seam roofing of roofs, although there are not so many of them. Here are some of them:

Quite high thermal conductivity, which leads to the formation of icicles on the roof in winter;
Due to the smoothness of the roof surface, snow and ice can roll down like an avalanche.

However, this drawback can be eliminated: in winter, hire specialists who will clean the roofs of snow and icicles. In no case do not try to do it yourself without the necessary equipment and experience, because. due to slip and smoothness, the surface is very dangerous!

Poor sound insulation;
The need to install a lightning rod;
With a very detailed examination and approximation, you can see "bruising" on the metal surface, but this in no way affects the quality of the seams.

Climatic conditions for this type of roof

The main feature of our type of climate is seasonality and a wide range of temperature regimes due to this. Among other things, the precipitation of a wide variety of precipitation throughout the year is the most severe test for roofing and roofing materials of any kind and type.

Seam roofing is the most versatile type of roofing for our type of climate, because it protects the house in almost all weather conditions. Including from rain and leakage associated with it, because. there are no through cracks on the surface due to the peculiarity of the seams. As for winter, here, as mentioned above, it is advisable to resort to the help of specialists and spend a little money to ensure complete guaranteed safety for you and your family members.

Useful recommendation: in regions with increased solar activity or with too hot climatic conditions, such a polymer coating for seam roofing as pural. Pural is a polymer that prevents negative effects on metal coatings of such natural factors as high humidity, salts of various compounds after radioactive fallout, and other harmful emissions.

Practical application of folding

Folding is one of the most modern methods of mounting a metal coating, which allows you to connect metal sheets to each other using a special seam - a fold (single or double, standing or lying). It is this type of fastening that creates a special kind of pattern on the surface of the roof. The manufacturing technology of such a seam is rather complicated, but it ensures durability, quality and tightness.

Seam roofs find their application everywhere, in all areas of construction: both in municipal, industrial, commercial buildings and buildings, as well as in the private construction of summer cottages, houses and cottages.

Mounting

Installation of any roof is a painstaking task and requires maximum care and certain skills. For the installation of a seam type of roof, two main technologies are mainly used: roll installation technology and traditional technology.

Roll is considered more mobile, since roofing materials are prepared on the spot, this requires sheets of metal of a certain desired length. With this technology, a standing double fold is usually used.

If we talk about traditional technology, then everything is much more complicated than the above, because there are more stages of installation, and they themselves require a lot of time. First you need to prepare the drawings, then create the so-called "painting" blanks - metal sheets. Naturally, for marking and working with this technology, it is necessary to acquire modern tools and special aids. However, the game is worth the candle.

Each of the technologies has its pros and cons, depending on the structural features of your roof, the structures at the base, and the materials.

Below is a step-by-step technology for installing a seam roof with illustrations for each stage.

Favorable weather conditions for installation

Of course, for any construction work, the best conditions are warmth and dryness. But, unfortunately, it is not always possible to guess. You need to think through everything to the smallest detail: snowfall, ice, rain, reduced daylight hours, etc. - everything that can delay or extend the work. Remember to carry out roofing work at temperatures below
-15, -20°C is not recommended at all.

And if you are still determined, then the best advice is to stretch an awning over the entire area of \u200b\u200bthe house in order to avoid covering the surface with snow or ice, damaging materials, etc.

Required Tools

You may need a lot of tools and nozzles for them, and the most basic of them:

any measuring device, such as a level, plumb line or level - a tool for determining the difference between the heights of certain points on the surface in relation to the set level, for measuring the excess level;
scissors (electric for carving and manual for cutting), as well as a nibbler - a special machine for quick sharpening;
for the device of the crate, it is better to use a jigsaw and a hacksaw;
"Bulgarian";
perforator and drill;
a pressing gun may also be needed;
mallets (both wooden and rubber).

And please use one piece of advice: cutting seam panels with angle grinders is permissible only if the unprocessed areas are protected from sawdust that fly out, and the cut points are painted with an anti-corrosion solution.

Necessary materials and means of installation

There are also a lot of auxiliary tools and special materials that may be needed during the installation process. Looking at the picture, match the numbers and you will see how and what it looks like and where it should be installed.

Rice. 15. Mounting materials

directly the metal sheet itself for folding;
drainage system;
crate;
an important counter-lattice (the so-called counter-bars) - these are bars that are stuffed onto the rafters, directly onto the hydro-barrier material;
waterproofing;
insulation;
vapor barrier;
the most common double-sided tape;
ceiling lining;
technological crate;
rafters;
solid crate;
cornice lining.

roof structure requirements

There are many types of roofs. The main division is based on the slope: pitched and flat. If the slope is more than 10% - this is a pitched roof surface, and up to 2.5% - this is, respectively, flat. Also, roofs can be attic or non-attic (in other words, separate or combined), depending on the design solution. It is possible to divide the roofs into single-pitched (reliance on load-bearing walls that are different in height; suitable for building utility rooms), gable (consist of two slopes that rely on walls of the same height), three-pitched, four-pitched and multi-pitched - depends on the shape your roof.

Fig.16. shed roof

Rice. 17. Gable roof

Which roof shape will be more suitable for the covering you have chosen? It is better to leave this question for professionals who will be able to inspect your “fortress” “on the spot”. However, it must be taken into account that for the individual construction of residential premises, the most suitable type is usually pitched and sloping roof structures.

The need to install snow guards

Seam roofs, given the smooth surface of the coating, are in dire need of installing this part.

They are installed above the roof railing. If the slope length exceeds 10 meters, it is necessary to install snow retainers in two rows. In advance, in the process of direct installation of the roof, you need to mount an additional profile (usually 12 cm from the crate). The bracket is fastened with a dowel through a sealing gasket (rubber) and a seam panel to the crate.

For safety reasons, do not attach the brackets to the same sheet .

Processing of wooden roof structures

It is highly recommended to treat wooden surfaces (mainly antiseptic and flame retardant - fire treatment). It can be done either before assembly or after assembly of the structure. Before assembly, individual beams and boards are processed by various methods, including immersion in a container with a solution. After assembly, it is possible to process the battens and rafters, both with a spray gun and with a brush, apply the solution.

Roofing dismantling

The dismantling of the roof is just as important as the installation, it is the same painstaking and complex procedure, which requires certain knowledge, experience and special tools.

If you are not sure that you can dismantle the roof correctly, according to all the instructions and safety precautions on your own or even with the help of friends and acquaintances, then the best option is to seek the help of qualified specialists. They will do it quickly, professionally and efficiently, although not cheap.

For the "correct" dismantling, special tools are used to help remove the roofing material without damage so that it can be reused. This is very important, because it is known that the materials for seam roofing are for the most part not cheap.

Notable Folding Uses

The metal has been firmly tested for thousands of years, and such a technique for joining it as a seam has been at least for centuries, and in combination with modern and modernized installation systems, it makes it indispensable in construction.

Here are some interesting folding examples.

Tampere, Finland

This is not only the building of the city library, but also an interesting example of modern architecture, which consists of autonomous bodies of different diameters and heights.

Stockholm, Sweden

In this image, we see the use of a seam (both lying and standing seams), as well as the use of a bright architectural solution - the "spinning" of the metal. This is a photograph of the Swedish museum in honor of the Vassa ship that sank more than three hundred years ago. Such a "torn" image makes the viewer perceive the tragic story of the shipwreck more deeply.

Helsinki, Finland

The peculiarity of the roof of this building is that the joints of its roof are made "in a row" according to the seam technology of the roof from blanks of metal sheets (about 4 m in length).

Nizhny Novgorod, Russia

This building is known as the Gramophone House. Its "highlight" is a bright green roof of a specific shape. Regarding the technology used in this case, it can be said that the horizontally spaced blanks are connected by a lying fold, and the use of a single standing seam is noticeable on the edges.

Amsterdam, Holland

In the water area of the port of this amazing and mysterious city, there is a green ship - a building of a rather strange shape. Its main technological feature is the use of artificially aged copper.

The erection of a private house is completed by roofing work. This stage is considered one of the most difficult and reliable. Moreover, the difficulties are associated not only with the roof device itself, but also with the choice of coverage. This is quite difficult, given the huge variety of roofing materials that are on the market.

No matter how strong and durable the material is, the reliability of the finished roof covering will depend on the quality of the attachment of the individual elements. Today, seam roofing is extremely popular, when laying which a special type of fastening is used.

Seam roof, what is it

Seam roofing is a continuous covering laid along the entire length of the slope. Its individual elements, folded panels or paintings, are interconnected by special elements - folds.

Seam panels are metal sheets, the side edges of which are specially prepared for this type of connection.

For the manufacture of a metal seam roof, you can use finished paintings (0.555x8 m) or roofing metal in rolls. In the latter case, special bending equipment is used, which is installed directly at the installation site. Manufactured picture panels can have folds of various shapes, single or double, of different lengths. In any case, they are rolled in one pass.

Metal for a seam roof can be of almost any type:

copper;
aluminum;
steel;
alloys of zinc and titanium.

On a note

Galvanized seam roofing, as a rule, has a polymer layer of pural, polyester, plastisol and others.

All of them are durable and simple, do not corrode. These materials are lightweight, easy to mold, can take any shape, even the most bizarre.

Types of folding roof

Metal sheets are prone to thermal expansion, which can create certain complications when joining. The penetration of water into the roofing cake can be prevented by laying a uniform waterproof layer on the crate under the seam roof. However, it will be impossible to achieve a rigid connection due to a change in linear dimensions. In this case, stress arises at the mating point, which leads to possible significant deformations.

Experts believe that the only reliable option for a mechanical connection is the use of a special method - folding. By the way, the word "fold" is of German origin and means "gutter" or "groove" in translation. It involves connecting the edges of adjacent paintings, which are bent in a special way. At the same time, grooves are formed along them, which serve to divert water.

Seam joints are classified according to two parameters:

appearance: recumbent, standing or corner fold;
degree of compaction: 1. single fold, 2. double fold (photo below).

The folds are rolled mechanically by hand or using a special tool, or electromechanically using special devices.

The main types of standing folds

Single. This is the simplest connection method, which is used when the seam roof slopes from 10 °.
Angular. A special L-shape creates volume and provides the connection with a spectacular appearance, therefore it is used mainly on “visible” surfaces with a large area: facade, with a seam roof slope of more than 25 °, etc.
Double. This connection is more difficult. It is performed in two steps: first, a corner fold is created and it is bent at a right angle. Seam-rolling equipment of a new generation makes it possible to obtain a double seam seam on roof segments that are technically difficult to process. On small slopes, it is better to solder them. Transverse thermal expansion occurs mainly at the base of the seam, so there must be a gap of up to 5 mm.

A double fold protects the structure from the effects of precipitation, as well as melting snow, but it does not save from standing water either. That is why, according to SNiP, the seam roof must have an angle of inclination of at least 10 °.

On a note

However, if a special sealing tape is inserted into the seam before crimping, the minimum slope threshold can be 3°.

Today, another type of fold is used - self-latching. To connect them, you can limit yourself to a simple click.

Advantages and disadvantages

The seam roof, like any other, has its advantages:

the plane of the roof covering, assembled from paintings on double folds, is a single sheet with a smooth surface from which water from precipitation and snow freely descends;
low weight, which allows not to strengthen the supporting structure and thus reduce costs;
such a roof can be used for a long time - more than 50 years, given the high anti-corrosion resistance of the coating;
high moisture resistance, which is explained by the reliability of the seam lock and the minimum number of holes for fastening. This level of tightness eliminates possible leaks;

simple installation for a roof of any complexity, which you can handle with your own hands with a self-latching lock;
waste when working with the material is minimal. For example, unused scraps of such an expensive material, formed during the installation of a seam roof, can be rearranged to other areas. Moreover, unlike, say, no components are needed for such a coating. Thus, it is much more economical;
Suitable for all lengths, both short and long.

Folded roofs also have disadvantages. Among the most important we note:

laying an additional layer of sound insulation, which will dampen the noise from raindrops, etc.;
mandatory installation of a lightning rod that minimizes the risk of static electricity, which accumulates on the roof;
the need for high-quality and expensive tools.

Installation instructions

How is the installation of seam panels, how to properly connect them to ensure durability and strength of the roof covering? The technological map for the installation of a metal roof involves the sequential execution of several stages:

Sheets are made that are specially prepared for folding. This process is carried out in production conditions to order according to individual sizes. This allows you to get maximum accuracy when installing a seam roof. In parallel with the panels, shaped elements are also ordered, for example, overhangs or skates and more.

Attach metal sheets with a special tool or by pressing for self-locking folds.
Attach them to the crate. For this, narrow strips of the same material are used as sheets - “clasps”. One end of the fastener in the process of bending is brought into the fold, the second is fixed to the crate element.

Two different types of clamps are used for fastening:

tough. The picture fixed on them remains motionless relative to the base. They are used on any slope, while the location of rigid clamps depends on the angle of the roof;
floating. They are mainly used for slopes over 10 m long. Metal sheets expand and contract with temperature fluctuations, and a hard clamp can cause significant deformation. As for the floating, the free play of this fastener is enough to avoid such complications.

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In the construction market today you can find many different materials that differ from each other in price. It is simply impossible to finally answer the question of what kind of roofing material is the best, since under certain conditions one should proceed from certain advantages and disadvantages. Many homeowners prefer bituminous materials or ceramic roofing, but steel is just as good, and sometimes even a much better solution.

Steel roofing sheet is striking in its diversity. It can take the form of smooth sheets, which are connected by seams, folds, but also occurs in the form of tiles. To create such a material, galvanized steel is used, additionally coated with a layer of polymer. Due to this, roofing sheet steel copes well with corrosion and external factors.

Such sheets of metal are called paintings. A roofing steel thickness of 0.5 mm or more is sufficient to provide high quality home protection. For roofs with a large area of planes, rolled steel is used, which allows you to speed up the laying process. For a small country house, it is much more convenient to purchase ready-made, cut sheets.

Fastening is carried out with clamps. All connections have the form of folds, that is, curved seams. They can be single or double, standing comb or flat recumbent. The specific choice depends on the junction of the paintings and the need for waterproofing. Folds are recommended to be additionally treated with silicone sealant.

Steel roof - main types

To date, such a roof can be made of various materials:

Tools and materials for work

The steel roof is laid after certain preparatory procedures have been completed. Necessary:

check the angles of the slopes, since the roof should have a slope of no more than 30 degrees and at least 16;
check the strength of the crate, the step of the bars and the reliability of the fasteners. This procedure is especially important, since poor-quality lathing can lead to roof deflection;
carefully check all steel sheets for dents, cracks, bubbles and other damage.

Then the preparation of the tools that will be needed for roofing begins:

roofing nails 4 * 50 mm with a special cap for fastening to the crate;
nails 4x100 mm for fixing hooks and crutches;
special hooks designed for fixing gutters. Usually they are made from steel scraps 2 cm wide and 42 cm long;
crutches for cornice overhangs. They are used to fix overhangs (more details: "");
picture clips;
machine for bending seam seams (also exists). For laying the roof of a small house, you can get by with a manual machine.

Stages of installation work

Work begins with the installation of crutches along the entire eaves. The indent from the edge is 150 cm, the laying step is 70 cm. All crutches are nailed to the crate. They are needed to support the paintings. So that the crutches do not move, they are first placed along the edges of the eaves. After that, a cord is stretched between them, along which the hotel elements are aligned.

Next, move on to the installation of paintings. This can be done using a variety of tools, but it is best to use a folding machine. The types of fold are distinguished depending on the place of installation: recumbent folds are made along the short side, standing folds along the long side. This allows for good drainage of water from the roof surface.

Roofing sheet steel GOST provides for fastening with folds, both single and double. In places of greatest accumulation of water, only double connections are used.

The finished sheets are attached to the base with the help of clamps, which are nailed with one end to the timber, and the other end into the fold. All clamps are attached at the ends of each sheet. In this case, each sheet is shifted by 5-6 cm so as to separate the recumbent folds on the sides. In an illogical way, the ridge folds are also displaced.

After laying, all excess elements are cut off with scissors for metal. The resulting sections are treated with a primer. The folds, to give them greater tightness, are treated with silicone sealant.

Installation of a steel roof should be accompanied by the following features:

Repair work: what is the specifics?

Repair work on such a roof has a number of features. The fact is that it is very problematic to disassemble a separate section of the roof, the procedure itself is laborious and time consuming. But there is an alternative approach that allows you to quickly complete repairs at a very high level.

Small damages up to 5 mm in size are sealed with sealant (acrylic or silicone) or special red lead grease. Such compositions are applied with a spatula with a layer up to 8 mm thick. In addition, good results are shown by the use of bitumen-based adhesive tape. After repair, the work site is sanded and painted with special paints.

In most cases, such roofs do not need frequent repairs. Damage is often caused by extreme loads or mechanical impacts. For example, the accumulation of snow, above the calculated amount or the fall of a tree branch. Also, in case of careless behavior with the material and damage to the protective polymer layer, the metal begins to corrode, which leads to rust and holes in the roof. Therefore, it is recommended to handle the material very carefully during installation. In addition, regular inspections should be carried out for the appearance of rust spots and accumulations of snow or fallen leaves.

Metal roof device: installation and installation ").