Steel roof. Metal roofing: types, design and installation. High-quality installation of metal roofing is the key to success

“Roofing iron” is a simplified name for a category of materials that are attractive due to their light weight, low and relatively low cost. Among the advantages are the large dimensions of the elements, which makes installation easier and increases the pace of roofing work. A very convincing argument is fire resistance and tightness, justified by the complete absence or minimum number of holes for fasteners. It’s not without reason that the list of advantages includes ease of installation, thanks to which the owner can build a metal roof over a country bathhouse with his own hands.

Types of Metal Roofing Sheets

Over centuries of metal use as roofing, many technological variations have been created. Instead of the simplest sheet iron, aluminum or copper, you can now use unique “constructors” produced in factories with a full set of fasteners, additional parts and elements for arranging connections.

The conditional classification of roofing iron divides all currently existing types of metal roofing into the following groups:

• cold-rolled, thin-sheet or rolled, black or galvanized steel, used for the installation of budget seam roofs;
• fully prepared for installation, attracting with an abundant range of modifications of different colors and shapes of elements, and corrugated sheets with similar priorities;
• non-ferrous metals, the group of which includes coatings made of copper, titanium-zinc alloy and aluminum.

Let’s put aside the advantages of convenient and technologically advanced roofing sets made of metal tiles and corrugated sheets due to their high cost. For the same reason, let's temporarily forget about non-ferrous metals. Let's consider the most economical independent installation of a metal roof, the implementation of which will require steel sheets with a strip length of 2.50 m and a corresponding width of 1.25 m.

It is recommended to buy steel for roofing with double-sided galvanization. It is more expensive than its “black” non-zinc coated counterpart, but the money invested in the material will be returned due to rare maintenance and optimized wear resistance. According to the hot-dip galvanizing method, cold-rolled material is completely immersed in containers with molten zinc, as a result of which a dense protective layer is evenly deposited on its surface.

The material thickness values ​​are dictated by the building code: metal roofing (SNiP II-26-76), in accordance with the requirements of building regulations, is constructed from a thin-sheet product from the rolling industry. For roofs, steel with a thickness of 0.5 mm to 1.5 mm is purchased. It will be easier to work with the thinnest sheets; they are easier to bend to form joints. But if the owner plans to make additional parts and drainage elements from the same material, a thickness of 0.6 mm to 0.8 mm is recommended.

Note. Building rules do not prohibit, but also do not recommend distorting the shape of galvanized sheets, as a result of which the integrity of the zinc coating may be disrupted. According to the requirements of SNiP number 3.03.01-87, metal tools during work cannot be placed on a galvanized surface without a wooden lining. Damage to the zinc protection will cause loss of performance.

Independent device and installation

The most common and economical type of laying metal sheets on the roof is called seam technology. The name and principle of construction is based on the method of connecting elements with repeatedly curved edges, forming longitudinal and transverse seams - folds.

• Transverse seam joints are used if the horizontal size of the slope exceeds the standard length of a steel sheet of 2.5 m. They can be single or double; they are called horizontal because they have the same direction, and recumbent because they are bent in the direction of water drainage from the roof so as not to create barriers to spontaneous drainage of precipitation.

• Longitudinal seam seams connect the roofing elements along the imaginary vertical of the slope, that is, along the side line of the sheet. They are not bent because they do not obstruct the flow, which is why they are called standing. By analogy with the previous connections, they can be double or single. Not a single installation of metal roofing using seam technology is complete without horizontal standing joints.

Horizontal connections, especially if they are single, reduce the ability of the structure to resist atmospheric negativity. If possible, it is advisable to exclude them. Standing double seams are recognized as the most reliable and practically airtight. You can form a seam either using a hammer and a wooden screw, or using special electromechanical seam rolling machines or manual comb benders.

Specifics of standing seam roof construction

Its main element is the painting. This is a part assembled from two adjacent steel strips with curved edges necessary for subsequent connection. The paintings are collected on the ground. To assemble them, it is advisable to make a special workbench with a length equal to the length of the parts of the picture to be connected.

To splice the paintings and attach the outer panels to the sheathing, you will need homemade clamps - strips cut from the same steel with side dimensions of 3 and 15 cm. They are attached every 0.5 m next to the vertical seam line. Taking this fact into account, you need to make the required amount of fasteners from scraps of steel sheet.

Attention. Galvanized steel parts are cut with scissors. The grinder leaves an uneven jagged edge and burns out the protective coating.

The paintings, assembled in a safe environment with the edges prepared for joining, are lifted up, but first the base for their installation is prepared.

Construction of the rafter system and sheathing

The rules for constructing a rafter system for a metal roof are no different from the technologies for constructing frames for other roofs. Only due to the lightness of the material, it is not necessary to be careful with the location of the rafters. However, given the ability of the metal to sag under the weight of human weight, the sheathing beams are installed at intervals of 20 cm. This step will prevent damage to the coating, since the foot of a person climbing onto the roof for repairs or maintenance will invariably rest on the sheathing.

According to building regulations, the minimum slope of metal roof slopes is 14º, the maximum value is 30º. For flat roofs, the installation step of the slats will have to be reduced; it is even better to make a continuous covering from edged boards.

If the roof is insulated and waterproofing is laid over the sheathing, a counter-lattice made of thin slats is required to form a ventilation gap between the metal covering and the insulating layer. Thanks to ventilation, there will be an equal temperature on both sides of the roofing material, which means there will be no condensation that destroys the metal and no icicles on the eaves.

The eaves overhang is made of 3 or 4 solid boards. The ridge is formed by laying boards on both sides, converging at a single point.

Assembly of seam roof elements

Assembling a metal roof fencing begins with the installation of special crutches installed along the eaves overhang every 70 cm. Initially, two crutches are nailed along the edges, and a cord is pulled between them to align the remaining parts. The crutches can be replaced by a metal corner with a side of 4-6 cm nailed along the base of the overhang.

Attention. To cross the ridge, a 3 cm edge should be left on one side and 6 cm on the other.

• The paintings, made up of two metal strips, are transported by car lift to a storage area specially organized for them at the top.
• First of all, along the line of location of the second picture, clamps are attached with self-tapping screws every half meter. The clamp must be positioned so that its fixation point is covered by the picture laid on top.
• Then the first picture is installed, the side line of which coincides with the line of the pediment. The first element is fastened through the pediment line with self-tapping screws.

Attention. Ordinary paintings have edges of different heights, usually one is 5 cm, the second is 2.5 cm. The first strip has both edges of 2.5 cm.

All elements of a seam roof are mounted according to a similar scheme: first, clamps for the next strip, then installation of it itself and connection with the previous strip. The fold is folded together with homemade fastening strips. Thanks to the installation of clamps, simultaneous fastening is carried out both to the sheathing and to adjacent elements. Experienced roofers advise strengthening seams with silicone sealant.

Advice. To prevent unbending of homemade clamps, you can add a riveting to the point where they are located in the horizontal seam.

• Upon completion of the merging of the seams, the joints must be sealed using a hammer and a strip of metal.
• Then the smaller edge is folded over and secured to the ridge, and the larger ridge edge is placed on top of it and secured.

If the galvanized surface is not suitable for aesthetic reasons, it can be primed with pigmented drying oil and then painted.

Lightning protection

There is an opinion that a metal roof does not need a protection device, because it is a natural lightning rod. However, a direct lightning strike can still cause a fire due to overheating of the metal installed on the wooden sheathing. If the seams between the covering elements are sufficiently reliable, lightning protection of a metal roof is carried out by connecting it through a down conductor to the grounding system. If there is an electrical connection between the covering elements, pin and torso lightning rods can be dispensed with.

The construction of a metal roof is the simplest and most economical way to arrange a country bathhouse. If all stages are carried out according to technological rules, the roof will last more than 20 years, without requiring alterations or repairs. It is important to take into account the features of the metal coating and not forget about the installation rules.

The type of metal roof you choose will determine its durability, labor costs and cost of the work performed. A metal roof made of copper will cost you the most, followed by a roof made of copper.

Metal seam roofs made from flat sheets are relatively inexpensive. When calculating the cost of work, be sure to take into account that a roof made of galvanized roofing steel must be coated with an anti-corrosion compound.

The best roofing materials for the roof of a house

Metal roofing is widely used for low-rise cottage-type buildings, including those with complex roof shapes.

There are several types of metal roof coverings: flat (or with small stiffening ribs) coverings made of sheet or rolled steel, made using seam technology; coverings made of profiled sheets and its varieties imitating tiles; roofs made of non-ferrous metals.

Here you can see photos of various types of metal roofs:

Photo gallery

How to choose the best roofing materials for the roof of your house - high-quality and affordable? Firstly, any roofing materials must be accompanied by all necessary certificates (technical, sanitary, fire). Secondly, you cannot trust the cost of one square meter of roofing material. The customer should be interested in the cost of the entire roof, which includes not only roofing material, but also a lot of additional elements. For example, for metal tiles (one of the best roofing materials for roofs) there are more than ten of them. If these elements can be produced by roofing installers, their cost will be no more than 10-15% of the cost of the coating. Purchasing additional ready-made products can double the cost of the entire coverage.

When using metal roofs, combined coatings are very attractive. They are, first of all, protective aluminum-zinc coatings (galvalume). Galvalume is a pseudo-alloy of zinc, aluminum and silicon (typical composition 50% AI, 1% Si, 49% Zn). The advantages of such a coating include not only increased corrosion resistance, but also, for example, heat resistance.

One of the best roofing materials is copper, but it is also the most expensive. However, with a certain roof shape (and a not very logical approach to purchasing all the necessary additional accessories), a metal roof can surpass even a copper one in price. Thus, calculations have shown that, for example, a copper roof with an area of ​​400-450 m2 (the usual size of a mansion roof with a total area of ​​approximately 300 m2) is only 5-10% more expensive than a metal roof of the same area. Therefore, there is currently an increased interest in copper roofing.

It goes without saying that the best ones require additional costs for the purchase of components (in addition to the roofing itself). The price of components (suspended gutters, funnels, drainpipes, brackets and elbows for them, and in addition ridge, end and cornice strips, fastenings for ventilation and chimneys, television and radio antennas) can amount to 30-40% of the cost of the roofing material.

The strength of the roof increases when using profiled metal. Profiling (corrugation), i.e. giving a wave-like shape to metal sheets, galvanized steel corrugated sheets, both with and without a polymer coating, increases the rigidity of the roofing material. The profiled sheet can withstand heavy loads without changing shape. Sheets with a height of more than 20 mm are considered structural elements and their use must be confirmed by the manufacturer’s calculations for strength and deflection.

All roofing systems are divided according to the “price-quality” principle. Based on this ratio, roofing materials can be divided into several groups. The first group - low quality materials at a low price - rolled material and traditional slate. A roof made from these materials is quite suitable for a garden house or outbuilding, such as a barn or garage, but not for a permanent house. The peculiarity of the second group (ondulin, galvanized sheet) is average quality and a significant range in prices. In this case, the choice must be made by the buyer himself. The third group - flexible metal and cement-sand tiles, is characterized by high quality and average prices, not much different from the prices of the previous group. These two roofing materials can be considered optimal in terms of price-quality ratio. And finally, the fourth group - copper, flexible and ceramic tiles - the highest quality and most expensive materials. These materials are needed by those who dream of an eternal roof under which their grandchildren will live.

Metal seam roofing: advantages and disadvantages

What kind of roofs are called seam roofs, what are their advantages, disadvantages and what is a “roofing picture”?

Seam roofs are called roofs made of sheet and rolled galvanized steel (both with and without polymer coating), as well as roofs made of non-ferrous metals. In such roofs, the connections of individual covering elements (“pictures”) are made using seams. Seam (seam joint) is a type of seam formed when joining sheets of metal roofing. There are rebated joints: recumbent and standing, single and double. The long lateral edges of the steel strips running along the slope are connected with standing seams, and the horizontal ones with recumbent ones. Seams are made (rolled) either manually with a special tool, or in a modern way - with special electromechanical seaming devices. There is another type of folds - self-latching ones. They are connected to each other without using a tool.

“Roofing picture” is an element of the roofing covering, the edges of which are prepared for seam joints.

The advantages of such a metal roof are its durability, resistance to corrosion, a wide selection of colors, and low load on the rafter frame. In addition, the smooth surface practically does not retain precipitation, which reduces the overall weight of the roof.

The most vulnerable point of a roof made of metal or steel sheets is the chimney collar. In this critical area, water must not be allowed to get under the roof.

Metal roofs made of galvanized steel and their thickness

Ordinary uncoated steel is susceptible to corrosion, is short-lived and is practically not used as a roofing material. The roofing material is galvanized steel, which is coated on both sides with a layer of zinc.

When performing coatings, it is very important to enhance the anti-corrosion properties of a metal roof. Polymer coatings serve as additional protection against corrosion (as well as to give the roof decorative properties). Galvanized roofing sheet galvanized steel with a polymer coating has a multilayer structure: a steel sheet, a layer of zinc, a layer of soil, and finally, on the bottom side of the sheet there is protective paint, and on the front side there is a layer of colored polymer.

According to GOST 14918-80, galvanized steel for roofing in sheets and rolls is divided into two classes depending on the thickness of the zinc coating. The thickness of galvanized roofing steel of the first class is from 18 to 40 microns; second class - from 10 to 18 microns.

Belgian steel tiles "COVERSYS" with Aluzinc coating and high-strength polyester coating are suitable for climate zones in the middle zone. The technique of overlapping sheets allows you to work with this material on a roof with a slope of 12 degrees. The fastening of the elements can withstand wind loads of up to 220 km/h. The tiles are produced in sizes 1200×450 mm. Quality guarantee 30 years.

Galvanized steel roofing does not have a negative impact on human health and the environment. Zinc is harmless, which confirms its use not only in roofing materials, but also in drinking water pipes, drinking water tanks, buckets, etc. In addition, metal roofs made of galvanized steel are highly reflective, which prevents the roof from overheating in the hot summer weather.

Installation and installation of galvanized steel roofing

When installing a galvanized steel roof, the sheets are attached to the sheathing using a special galvanized roofing nail with an enlarged head with a plastic cap (rather than a regular nail, which will cause rust). Nails are driven only into the crest of the wave.

When covering the roof with galvanized steel, keep in mind that the low sound insulation of the material allows you to hear the sound of rain. However, for some this just evokes a feeling of homeliness and inner comfort.

Galvanized steel roofing may develop rust and, as a result, leaks. To eliminate these shortcomings, the place where the rust appeared must be washed with kerosene, then with water and cleaned with sandpaper. Next, cover with drying oil, and after it dries, apply a primer and, finally, oil paint in the color of galvanized steel.

Small cracks and holes are cleaned of rust and sealed with patches made of the same galvanized steel. Sequence of operations: 1. Clean the joints with a wire brush or sandpaper to remove rust, old paint, grease, etc. Fit the sheets to be joined tightly to each other. 2. Using a brush moistened with zinc chloride, wash the surfaces to be joined. 3. Wipe the hot soldering iron with ammonia and, with the tip of the soldering iron, apply solder evenly to the ends of the sheets to be soldered. 4. After cooling, remove excess solder (zinc-lead alloy or zinc-lead-cadmium alloy) with a file. If you are planning to prepare zinc chloride yourself, then you should remember that pieces of zinc must be placed in a vessel with hydrochloric acid, but not vice versa. Otherwise, an explosion may occur, resulting in severe burns to the body.

If you want to insulate your roof, you need a vapor barrier. Without it, vapors from a warm room penetrate into the insulation. In cold weather, the roof freezes, its service life is sharply reduced.

When installing a galvanized steel roof, roofing felt should never be placed under a metal covering. It does not allow vapor to pass through, it “does not breathe.” In a critical situation, glassine (roofing material impregnated with petroleum) can be used from domestic materials.

Types of polymer coating of galvanized roofing steel

Polymer coatings for galvanized roofing steel, first of all, are distinguished by varying resistance to ultraviolet radiation (color fastness), temperature (heat resistance), aggressive environments, mechanical damage and other factors.

The production technology of metal-plastic roofing sheets is quite simple. A thin and loose special layer is chemically applied to the zinc on both sides, ensuring a stable connection between the primer and the base. A layer of polymer is applied on top of the primer, and protective paint is applied on the reverse side. In a multilayer material, such as metal-plastic, the strength and ductility of galvanized steel are combined with the corrosion resistance and beautiful appearance of the polymer coating. Roofing materials made of metal-plastic do not require painting for a long time, and operating costs are practically reduced to zero.

There are several types of polymer coatings for galvanized roofing steel, differing from each other in various indicators (thickness, resistance to external influences, fading, etc.), such as PVC, pural, PVF2 (analogue of Teflon), polyester. Of all the listed polymers, the most common is polyester, since it best meets the requirements of “affordable price - high quality.” The maximum operating temperature of such a product is +120 °C. The minimum temperature at which bending of the material is allowed is -10 ‘C, which is also possible in the cold season. The warranty period for polyester is 10 years. In fact, if simple installation and operation rules are followed, the polyester polymer coating will last 50 years.

Acrylic coating of galvanized steel has a number of disadvantages. Acrylic is an unstable paint layer, it is easily damaged, fades in the sun, the average resistance to corrosion is 2-3 years, then it begins to peel off.

Seam roofing made of aluminum sheets: advantages of aluminum roofing

Aluminum seam roofing is made from coated rolled metal. Low weight (about 2 kg/m2) allows it to be used on almost all roof sheathing. The advantages of a seam aluminum roof are its durability, color fastness, and corrosion resistance. Unlike other roofing materials, which are attached to the base using self-tapping screws, dowels, and other devices that pierce the coating, aluminum roofing, when using folding and clamps, is laid without a single hole in the roof.

The service life of a roof made of aluminum sheets is no less than that of a copper roof, i.e. 100-150 years. She doesn't require any maintenance. And its cost compared to copper roofing or titanium-zinc roofing is significantly less.

Aluminum roofing can be made in almost any color due to special anodizing. This is very attractive for the customer. The fact is that visually the roof is equal to one third of the volume of the house as a whole. Being interesting in shape and color, the roof can meet the requirements of modern design and play an important role in the design of the appearance of the house.

The roof almost always requires a waterproofing layer. Only soft roofing does not require a waterproofing layer, since it forms a continuous sealed surface. When using other roofing materials, a waterproofing layer is necessary.

Metal roof defects and coating repairs

A new iron roof has practically no flaws, but indoors wet spots may appear at the junction of the wall. Most likely, the ceiling has poor thermal insulation, so warm air, always tending upward, leaks out from the living space. And due to the fact that the attic space is poorly ventilated, it settles on the lower surface of the roofing iron in the form of condensation, which, flowing down, ends up on the mauerlat and along it - on the wall. To eliminate this defect in the metal roof, it is necessary to ventilate the attic. There are cases when a dormer window is boarded up, which also causes the walls to become wet.

Leaking of metal roofs in the year of manufacture or the next year after repair can occur due to the fact that the seams (standing or lying) are either not tightly crimped, or before crimping they were not coated with putty based on red lead or white lead. The following are used as sealing materials when repairing metal roofs: single-component silicone sealant “Elastosil 11-06”, thiokol mastic KB-0.5; self-adhesive tape "Gerlen-D". You can use a sealing layered material - Armokrovlelit, consisting of a reinforcing base (fiberglass type T-12-41, ASTT) and Krovlelit mastic. The sealant with a layer thickness of 2 mm should be applied to a dry, dust-free surface of the rebate, free of rust and peeling paint, with a spatula until a smooth surface of the sealant layer is obtained.

Sometimes it is necessary to remove holes and fistulas where the roof meets the supporting parts of protruding structures. Sealing of seams and holes in a metal roof is carried out at a relative air humidity of no higher than 75% only on a dry, clean, dust-free surface. To repair a metal roof with your own hands, self-adhesive tape “Gerlen-D” is cut into strips 25-30 mm wide and a length equal to the length of the sealing folds, but not more than 2.5-3 m. Place the strips of tape on the folds, press firmly to the surface with a rubber roller . Large holes and holes measuring 10 mm or more are covered with a patch of roofing steel or two layers of fiberglass with sealant.

Painting and protecting metal roofing

Metal roofs must be painted every 3-5 years. Roofing made of steel sheets especially needs regular painting (galvanized does not require special care for the first 10 years, and then it also needs to be painted every 3-5 years).

The composition for protecting metal roofing “Zinga” provides barrier (passive) protection of the surface, primarily from penetrating moisture.

A layer of zinc on a metal surface actively protects iron from corrosion - it oxidizes itself, preventing rusting (the so-called cathodic or donor protection). It is the combination of these key factors that distinguishes Zinga from paints in general and from zinc-containing paints in particular. The latter create, first of all, barrier (passive) protection, the effect of which is enhanced by the inclusion of different amounts of zinc particles (of different sizes and purities) in the paint.

A metal roof needs to be properly maintained. During the operation of wooden load-bearing structures, bolts, clamps and other metal fasteners in corner joints should be tightened and, if necessary, damaged and rotting individual elements should be replaced.

Areas of the roof with a damaged paint layer must be painted immediately, without waiting for the next general painting. When corrosion appears on roofs and drainage devices made of galvanized steel, they must be coated with anti-corrosion compounds. Sealing of faulty lying and standing seam roofs made of sheet steel should be done with their preliminary coating with sealant or red lead putty.

Replaceable damaged elements or individual sections of the roof made of piece materials must be laid on a continuous sheathing over a layer of rolled material (roofing felt, glassine, roofing felt, etc.). In roofs made of piece materials, when there is significant snow blowing into the attic space, the joints between the elements of the roof covering must be coated with cement mortar.

Malfunctions of the external drainage system (contamination and destruction of gutters and drainpipes, disruption of connections between individual elements among themselves and with the roof, icing of drainage devices and overhangs) should be eliminated as defects are identified, preventing deterioration of the system. Roofs with external drainage must be periodically cleared of snow, preventing its accumulation in a layer of more than 30 cm. On roofs with slopes of 45° or more and with free discharge of water, snow should be cleared only in gutters and above the eaves.

In modern construction, metal roof has become more relevant than ever. Next we will talk about the structure of this type of roof and its main properties.

Like any stage of construction, metal roof equipment is accompanied by financial costs and takes a lot of time. Therefore, at the design stage, it is necessary to become familiar with the technological process and materials used during the construction of a metal roof. To calculate the number of steps on the stairs to the roof, use the online stair steps calculator.

Over the past years, the most commonly used material during the construction of roofing structures is a metal sheet. This is facilitated by the wide range of metal sheets on the market and the relative ease of assembling the roof during installation work.

Long service life and higher strength compared to other types of roofs also contribute to the increasing popularity of this type of roofing. Compared to roof coverings that were used until recently, metal tiles has a number of advantages:

• Long service life without additional investments;
• No need for additional roof maintenance work;
• High mechanical strength, and as a result, excellent resistance to gusts of wind, rain, snow, and icing;
• Easy installation;
• Low flammability;
• High economic efficiency.

One of the most effective and at the same time simplest options is pitched metal roof.

Also widely used metal roofs contributes to a wide range of different tones of metal tiles, which is limited almost only by the taste of the customer of the material.

The texture of this material is suitable for any shade of color, so your structure will look original for a long period and be recognizable from any point in the landscape. After all, the roof affects the perception of the house as a whole, while diversity metal roof paint colors will allow you to bring to life the most daring projects.

It is worth noting that although metal roofs a little more expensive during construction compared to classic materials, but they more than pay for themselves during operation. After all, repairs to this type of roof are only necessary due to mechanical damage, which happens quite rarely.

So, a classic slate roof will require major repairs in 15-20 years, while a metal roof will last at least 60 years.

As in any business, during construction metal roofs It is necessary to use the services of qualified builders who guarantee the quality of work.

Due to the high popularity of this type of roofing, it will not be difficult to find a good contractor who will not only perform the work efficiently, but also help you choose the right quality materials. When choosing a contractor, you should ask him to show examples of work already completed and interview their customers about the integrity and reliability of these specialists.

You should not grab the first team you find, because there are probably specialists on the market who will perform high-quality work at a lower price.

Properties of a metal roof.

Of the positive qualities of metal tiles As a roofing material, it is worth noting the following:

1. The long service life of the roof ranges from 30 to 50 years, which is much longer than that of classic roofing materials, the service life of which is up to 20 years. Often famous metal tile manufacturers They provide a guarantee of up to 50 years on their products. And if during the warranty period there is a premature failure of the roofing material, the manufacturing company will carry out warranty repairs of the roof at its own expense. It is also worth noting that a metal roof can be built directly on top of the old coating, which is guaranteed to significantly reduce the customer’s costs due to the absence of costs for dismantling old roof structures.

2. High resistance to various colonies of mold and fungi allows for successful operation in various climatic zones for a long period without additional costs.

3. The low flammability of metal tiles will prevent the roof from igniting and, as a result, significantly reduce the likelihood of a fire in the building.

4. Significant mechanical strength provides a high degree of resistance to various natural phenomena, such as strong wind, hail, squall, earthquake, severe frost.

5. Thanks to the availability of a wide range metal roof covering, which imitates various textured surfaces, such as pebbles, wood, bitumen shingles, tiles, etc., opens up wide scope for various design solutions, which is important during the construction of a modern building. It is envisaged to both paint the already assembled roofing structure and select a metal covering pre-painted in the desired color.

6. Thanks to the presence of a glossy surface, metal roof significantly less susceptible to heating by direct sunlight, which reduces the cost of cooling the roof.

7. Because basically metal roof covering made from recycled materials (scrap metal), this material is environmentally friendly, which is important for environmental protection.

Steel roofs are currently of limited use due to the saving of metal. Roofing steel is used in residential construction to cover eaves, gutters, dormers, protruding decorative elements of buildings and for drainpipes. In addition, roofing steel is used for repairing existing steel roofs, as well as for covering industrial buildings, belts, sandstones and window flashings on building facades.

Installation of a steel roof. The steel roof is made from galvanized and black roofing steel sheets measuring 1420x710 mm. Before use, determine the correctness of their dimensions and the squareness of the corners. Sheets with deviations from standard sizes are sorted and subsequently used to prepare roofing elements that do not require exact dimensions, for example, for drainpipes and drains. On standard sheets, bulges are removed with hammers. To prepare various products, the material is marked onto the workpieces using measuring instruments and tools, and marks are made on the metal. Then, according to the markings, the steel sheet is cut with various types of scissors, depending on the thickness of the sheet. Pictures are prepared for ordinary covering of roof slopes, eaves overhangs, wall gutters, and gutters. The picture is an element of the roof covering, the edges of which are prepared for a seam connection. Usually they are made of two sheets, less often single. The paintings on the roof are connected into strips the length of the slope, i.e. from the cornice to the ridge. The strips are attached to the sheathing with narrow strips of roofing steel (clamps), which are inserted into the standing seams when they are bent at one end, and nailed to the sheathing beam with the other. Double lying folds are coated with mortar, and the folds of galvanized paintings are soldered. Roofing sheet steel for preparing pictures or links of drainpipes must have smooth planes with right angles. In Fig. Figure 30 shows types of seam connections.

Rice. thirty. :
a - bend of the edge for a single recumbent fold; b - joining sheets with a single folded seam; c - edge bend for double rebated fold; d - joining sheets with a double folded fold; d - bends in edge sheets for a single standing seam; e - joining sheets with a single standing seam; g - bends at the edges for a double standing seam; h - intermediate bend for double standing seam; and - double standing seam connection.

Seam joints are divided into recumbent and standing according to their appearance, and into single and double according to the degree of compaction. Rebate dimensions in Fig. 30 are given for sheets with a thickness of 0.45...0.7 mm. For thicker sheets, the dimensions of the bends increase by 20%. The long lateral edges of the sheets running along the slope are connected by standing folds, and the horizontal ones by lying ones. Roof slopes are covered with strips made up of sequentially connected patterns. To cover the roof, 85...90% of double paintings and 10...15% of single paintings are required, which are sometimes necessary for addition in stripes. The eaves overhang begins with the installation of pins with brackets and T-shaped crutches, nailed to the sheathing. The pins are placed along the axes of the water intake funnels, and the crutches are placed 700 mm apart from each other with tolerances of ±30 mm. The distance between the pin and the nearest spike should be 200...400 mm (Fig. 31).

Rice. 31. :
a - general view; b - recumbent fold; c - standing seam; d - a picture of two sheets; d - fastening sheets with clamps.

Pictures for covering the eaves overhang are connected at the watershed with a single recumbent seam. Gutters, trays, funnels of drainpipes and the pipes themselves are elements of a single water intake system. Bends of lying folds are made in the direction of the slope. The top part of the trays is secured under the sheets of the gutter, and the sides are fastened to it. The funnels of the drainpipes should be attached not to the trays, but to the descent of the eaves with a special stepladder; When attached to trays, the funnel together with the tray may come off if clogged or frozen. The design of the wall gutter and water inlet funnel is shown in Fig. 32.

Rice. 32. :
1 - pin with bracket; 2 - water intake funnel; 3 - tray; 4 - flooring of grooves; 5 - rafter leg; 6 - cornice flooring; 7 - sheathing; 8 - picture of the wall gutter and eaves overhang; 9, 13 - nails; 10 - crutch; 11 - cornice overhang; 12 - hook for gutters; 14 - clasps.

Drainpipes are also assembled from pre-prepared links, consisting of a trunk, elbow and funnel. The pipes are hung vertically on the walls and secured with pins with brackets installed every 1.4...1.5 m. The installation of pins with brackets and the installation of drainpipes are carried out simultaneously with the laying of brick and large-block walls. Sheets of non-galvanized steel are coated with drying oil before being laid in place. In the future, such a roof requires systematic painting once every 2...3 years. Galvanized roofs do not need to be painted. The advantages of a steel roof are light weight (approximately 5...10 kg/m2) and the ability to create relatively small slopes (16...24%). When the roof is adjacent to a wall or firewalls, the edge of the row covering must be inserted into a groove against the wall masonry; in this case, the depth of the furrow must be at least 7 cm, and the height - at least 13 cm; the edge of the row covering inserted into the furrow must end with a vertical bend at least 10 cm high (see Fig. 31). In this case, the edge must be strengthened with spikes driven through 250...300 mm into the joints of the masonry or into tarred plugs embedded in the masonry.

When covering gable overhangs, belts, sandriks, turn-off strips are installed at the outer edge of the sheets. The side walls of lanterns and dormer windows should be covered with sheets connected to each other and with row coverings. When covering dormer windows of a semicircular shape, the sheets should be joined with a double seam, and dormer windows with flat slopes should be joined with a ridge. In places where the row covering adjoins the chimney, the width of the vertical bends of the edges of the collar placed under the otter must be at least 150 mm on the ridge side and 100 mm on the bottom and side sides. The gap between the pipe laying and the collar must be filled with putty. Chimney caps must have overhangs of at least 20 mm. The caps are fastened to the pipe using wire and nails driven no closer than into the second seam from the top of the pipe.

Steel roof repair. When repairing a steel roof, two types of patches are used in certain places: along the width of the picture, when the roofing sheets are worn out on the plane, and intermediate ones - when there is damage in or near the ridges. To apply the patch, a sheet is prepared with some allowance for the size of the worn areas. Allowances are used for connections. The damaged area is uncovered, a patch sheet is placed on this area, connecting it to the old sheet using standing and lying folds. The patches are joined by double rebated seams in valleys and wall gutters. On particularly flat slopes, the patches are connected to the old sheets by soldering the seams. Before installing the patches, they must be dry-dried, and after final connection with the old sheets, they must be painted over with weather-resistant paint compounds, while simultaneously painting over the joints to prevent corrosion.

If repairs to steel roofs are carried out in separate patches, then roofing paste, mastic, canvas, and tarpaulin are laid on holes in the roof ranging in size from 30 to 200 mm. If holes up to 30 mm in size are repaired without patches, they are covered with red lead putty, hot bitumen, or roofing mastic. Holes 30...40 mm around should first be cleaned of dirt, rust and coated twice from the roof and attic. Repair of gutters, eaves overhangs, gutters and drainpipes is carried out more often than the roof itself, since these elements are often subject to mechanical stress when ice is carelessly chipped and snow is thrown off; moisture is retained on these parts of the roof longer.

If half of the entire roof has become unusable, replace the entire roof with new sheets of roofing steel. The sheet material of the roof covering is especially susceptible to corrosion at the joints or between the sheathing bars on the attic side when the normal temperature and humidity conditions in it are disrupted. Connecting parts such as nails, bolts, wire are made of non-galvanized steel and at the points of their connection with galvanized sheets of roofing steel, an electric couple is formed, which acts destructively on galvanized steel. In this case, it is recommended to lay one or two layers of roofing material. The same phenomenon is observed when using non-galvanized clamps when installing drainpipes made of galvanized steel sheets. A sheet steel roof becomes unusable due to highly developed corrosion processes if the roof slope becomes insufficient, causing water stagnation. If it is necessary to replace the entire roof or most of it, it is necessary to install sheathing with a changed slope angle. When partially replacing a steel roof, work on preparing and laying roofing panels is carried out in the same way as when installing new steel roofs. Well-preserved old sheets removed from the roof are reused for row covering on the southern slope. They are pre-cleaned, cut around the perimeter, dried and painted. It is not recommended to use them for critical parts of the roof, such as valleys, eaves overhangs, etc. Only new sheet steel should be used for them. All folds, both standing and lying, are thoroughly coated with red lead putty before they are compressed.

In order to save steel, roofs with a high degree of wear can be repaired with rolled materials. Before starting work, defects in the sheathing are eliminated, then gutters, slopes and drainage devices are repaired. The torn sections of the roof and swollen areas are secured with nails, and the roof surface is cleaned of debris and rust with metal brushes. Cloths of rolled materials are laid along and across the standing seams of the roof (Fig. 33).

Rice. 33. :
a - in rows parallel to the ridge; b - in rows perpendicular to the ridge;
1 - pressing ridges of standing seams; 2 - hot bitumen; 3 - roofing felt.

When covering longitudinally along standing seams, triangular cross-section slats of the same height as the seam are nailed on both sides. Then the surface of the roof and bars is covered with hot bitumen, onto which sheets of material are glued; the work is carried out from the cornice to the ridge so that each subsequent row overlaps the previously glued one by 8 cm. When covering with transverse stripes, the standing seams are first bent to the plane of the roof. The work is carried out from the cornice to the ridge, gluing the panels with hot bitumen. Each row is laid so that the next one overlaps it by at least 8 cm.

Repair of drainpipes may involve partial replacement of individual links, elbows, funnels or their complete replacement. When changing individual straight pipe links and elbows, you should first lower the lower part of the pipe barrel by 8...10 cm, having first freed it from the tightening and stirrup. The part being replaced is then removed, a new one is put in, it is secured at the top end in the stirrup, and then the lower part of the pipe is lifted and connected to the new one. When completely replacing the drainpipe, installation begins from the bottom. When painting a repaired roof, it is necessary, if possible, to use drying-free paint compositions, for example, grade A coal varnish, the so-called Kuzbasskraska, which is obtained by grinding coal tar varnish with red lead in ball mills. Before applying Kuzbasslak to a steel roof, the surface is primed with divinyl acetylene paint. Painting steel roofs in hot weather, in the sun, during rain, on surfaces that have not dried out from rain or dew and at temperatures below +3°C is not allowed. Roofs made of non-galvanized sheet steel are painted with oil paints, which necessarily contain red lead or chromium oxide as a pigment. These paints are available ready-to-use or thickly grated. For the latter, the required working viscosity is obtained by diluting with drying oils.

© 2000 - 2002 Oleg V. site™

I, Varzin Leonid Nikolaevich, began my activity as a tinsmith on steel and copper roofs in 1987.
In 1994, our roof repair and installation company was founded. One of the significant achievements of our organization is the receipt in 2004 of an international patent for the invention of roofing panels (No. 2275479)
Over 22 years of work, we have selected a staff of first-class roofers who know their job. And our engineers will help you make the roof in accordance with your financial capabilities. The rise in roofing costs does not affect the quality of work. But it affects long-term operation.
Over the years, we have repaired and installed many roofs. And our customers always receive high-quality and reliable roofing over their heads.

We are waiting for your proposals for the work.

CEO L.N.Varzin

Any material, no matter how high-quality and durable it is, over time gradually succumbs to the influence of external factors and loses its original functional characteristics. Metal products are no exception, which may be the reason for carrying out such a service as metal roof repair. In Moscow, this service is very relevant, since the capital and its surrounding regions are densely dotted with private houses and cottages that may need professional repair services.

The Delema company specializes in providing services for working with various types of roofing systems and is always ready to provide professional assistance. The prices for metal roof repairs will pleasantly surprise you and will allow you to order repair work for your roof today.

As a rule, repairs of metal roofing systems are divided into two types: major and local (spot). The first type involves the complete replacement of old roofing elements, their dismantling and installation of a new sheet. The second involves carrying out work in certain areas whose condition is the most deteriorated. Major repairs of metal roofing in Moscow are carried out, as a rule, during the process of reconstruction of the building, as well as during the conversion of the attic.

The company's experienced employees will definitely advise you on all your questions and provide you with all the necessary and useful information.
Our contacts

Phones:
8 (495) 505 – 00 – 40;
8 (495) 507 – 10 – 08.

Cost of metal roof repairs

Price, rub.)

340 (material)

380 (material)

420 (material)

160 (with material)

600(with material)

380 (material)

760 (material)

Comprehensive roof repair from 1100 RUR/m2! Warranty up to 5 years!
Departure, measurement and repair consultation - free!

Carrying out this type of repair work is a very labor-intensive process that requires a high degree of training and practical experience from the roof repair worker. In order for your roofing system to be repaired to the highest possible quality, in this case you need to contact the Delema company, where you will be provided with the highest level of service. The prices for metal roof repairs in our company will pleasantly surprise our clients with their affordability, and our highly qualified specialists will complete even the most complex work in the shortest possible time.

The involvement of highly competent specialists and the use of modern equipment allows us to quickly carry out all work, while the prices for metal roof repairs at Delema are distinguished by their affordability.

The average price for working with the material is 750 rubles per m2. The price may decrease due to large volumes of roofing, and may also increase due to roof connections.

Our metal roof repair work