What professional sheet is needed for the roof of the house. Roof decking: how to choose and lay the cover? Material dimensions - ease of roofing

For many years, roofing corrugated board has occupied the most leading position in the building materials market. Unique properties and practicality allow it to be used in the most different conditions, and the price pleases with its availability.

But how to choose a suitable profiled sheet for a roof with a certain angle of inclination and operational features? What should be the height of the corrugations, are special grooves needed and which coating should be preferred? These are the questions we will now answer for you.

First, let's answer the question why corrugated board is so popular among other roofing materials. All because of such valuable qualities:

• Durability.
• Price.
• Light weight.
• Versatility of application - both as a roof covering and as a base for flat roof insulation.
• Easy installation.
• Rigid and fixed joint with roof sheathing.
• Resistance to atmospheric and mechanical impact.
• Rich color range.

Modern profiled sheets cover both industrial and industrial buildings of a huge area, and residential buildings with the most different type roofs - flat, semicircular, stepped and complex shape.

A profiled sheet is made of steel, coated - and without it. For additional strength, profiled sheets are subjected to cold bending to form a specific profile. And depending on how the ribs were made, what height, frequency and shape they are, it depends on whether this or that type of corrugated board is suitable.

Choice of stiffness and corrugation height

So which profiled sheet is more suitable for roofing? In this matter, we invite you to understand in more detail, because. experienced builders, for example, are sure that even the most common profiled sheet, if properly installed, will serve faithfully for a long time. But you want durability and ease of maintenance, right?

Wave height and leaks

A well-known fact - the higher the wave, the stronger the sheet, and the less likely the water will overflow through the wave. What does it give? The fact is that such “waves on the rocks”, when water overflows into another bend, significantly increase the water pressure on the holes from the self-tapping screws. Naturally, the risk of leaks in this case is much greater.

Rigidity of ribs and loads

Sheets with a small profile height are least suitable for roofing as they are not rigid enough. To withstand the load of snow in winter and the heaviness of a person's legs during the repair process, the profiled sheet for the roof must have a rib no lower than 20 mm. Of course, if you are building a house in a southern country where there is almost no snow, almost any type of corrugated board is suitable for you. So don't trust spectacular photos houses with almost flat corrugated board - there is no snow in such parts, otherwise he would have bent the roof in the first snowfall. And this is not for Russian latitudes in any case.

So, the higher the ribs of the profiled sheet and the greater their number per meter, the stiffer the profile, and the more it can take on the additional load. The most reliable in this regard can be called corrugated board grades H-60, H-75, H-114 and europrofiles H-153, H-158.

Roof profile types

Let's deal first with the marking of modern profiled sheets:

• H - bearing profiled sheet, which is used for its intended purpose for arranging flat roofs and ceilings.
• C - wall. This is the thinnest and most fragile profiled sheet, which can only be used to finish walls, fences
• HC is a universal profile that can cover both pitched and flat roofs.
• MP is a profile designed specifically for roofs by the Metal Profile company.

So, what types of corrugated board are suitable for the roof? Let's list them all:

• S20K with a thickness of 0.4-0.7 mm.
• HC35 with a thickness of 0.55-0.8 mm.
• HC44 with a thickness of 0.6-0.9 mm.
• H57 with a thickness of 0.6-0.9 mm.
• H60 with a thickness of 0.6-0.9 mm.
• H75 with a thickness of 0.6-0.9 mm.
• H114 with a thickness of 0.7-0.9 mm.
• Any profiled sheet marked MP.

And now about each - in more detail.

Profile S-20: a budget solution

The profiled sheet C20 has trapezoidal corrugations-notches along the entire length, which give additional rigidity and strength. Such a roofing does not require special cleaning or maintenance - any dirt is easily washed off by ordinary rain. And the C20 professional sheet is sold with almost any coating - from pural to granite, and almost any fashionable shade.

Easy to cut, easy to install on the roof and can even be reused. The minimum step of the crate on the roof for such a coating is 0.4 m.

Due to the large margin of safety, such a roofing is able to withstand a fairly strong deforming effect. This profiled sheet is so strong that in some conditions it is even used as a carrier.

The main advantage is, of course, the price.

Professional sheet C21: outbuildings and garage

Professional sheet C21 is an even more durable material than the previous analogue. This type of corrugated board is considered universal: it is suitable for roofing, walls, and fences.

An excellent subspecies is the S20K profiled sheet, which has an additional groove for water drainage.

Professional sheet C35: for the central regions

This professional sheet belongs to the category of roofing. All because of its special strength, which has a high level thanks to the trapezoidal ribs with a height of 35 mm. And the fact that the sheet is also a carrier is indicated by the letter H in the marking. The polymer coating can also be any.

Produced profiled sheet NS 35 by cold profiling. Uniqueness of this type of a professional flooring in profitability which is combined with excellent operational qualities. Excellent weather resistance, mechanical strength and yet relatively low weight. And what is most valuable, such a profiled sheet is best suited for regions where there is little snow, but the winds are strong. Due to the low specific gravity, tearing off such a roof is no longer easy - not the windage.

It is also easy to cut and easy to install, and its strength allows it to be used on fairly flat roofs in regions with little snow. Under normal (not extreme) conditions, it does not deform or sag. The main scope of application: pitched, flat and semicircular roofs.

Looking for something durable yet malleable for cutting and mounting? Then this is the most suitable profile.

Professional sheet NS 44: protection against hail

This brand of corrugated board is similar in all its parameters to HC35, only stronger. Excellent protection against hail, frost and intense heat. Like the HC 35, it can be used where there are strong winds but not much snow.

Is the weather in your area unpredictable? Then this brand is right for you.

Professional sheet NS 57: for snowy areas

This is a profiled sheet of increased strength, designed for significant loads. The step of the rafters can be made quite wide and not worry about anything.

Today, the HC57 brand is more in demand for roofing of hangars and warehouses, as well as roofs in fairly snowy regions. The special strength of such a corrugated board allows it to withstand severe wind loads. In addition, this profiled sheet is used for roofs with spans up to 3 meters!

Is it within reach of Siberia? Then cover the roof with a profiled sheet, and you will be calm.

H-60 profile: high quality

Profile H-60 ​​is actively used for pitched roofs. Sheet thickness - from 0.5 to 0.9 mm, and weight - in the range of 5-12 kg per one square meter.

Profiled sheet H60 is made from steel of sufficiently high quality, and covered with a protective layer against weather conditions. It is so durable that it can serve as a roofing covering for all 50 years. And it can be applied in regions with strong wind load. It also has a special groove for increased strength and water drainage.

Profile H-75: for flat roofs with load

The H-75 profile is designed for the arrangement of load-bearing structures, ceilings, pitched and flat roofs. It already has a greater thickness - 0.7-1.0 mm, and the mass ranges from 9.25 to 12.9 kg per 1 m 2.

Thanks to especially curved ribs, H75 profiled sheet is able to withstand huge loads, and therefore is most in demand in the construction of industrial facilities. This is a purely load-bearing corrugated board, which is also actively used for floors.

Profile H-107: maximum strength for a pitched roof

The H-107 profile is the most durable among traditional load-bearing corrugated boards and is 100% suitable for arranging a simple pitched roof. The profile of this brand is high and trapezoidal. The thickness of the sheet ranges from 0.7 to 1.0 mm, which is already quite a lot, and the weight is from 10.2 to 14.5 kg per 1 m 2.

Are you going to build a house for centuries, so that your grandchildren will get it? Then cover the roof with this profile - he is not afraid of anything!

Profile H-135: for inverted roofs

The H-135 profile has great rigidity and is used for arranging flat inverted roofs - such as those used to build a summer cafe and even a parking lot. That is, we are talking about serious loads!

Are you going to make a sports ground on a flat roof of a house or a bathhouse? Outdoor gazebo with barbecue? Then you need this profile - it is designed specifically for such loads.

Profile H-158: for extreme conditions

The most durable corrugated board is brand H-158. It has the highest corrugation, and it can cover the roof even with a support step of 9 meters! Usually such a roof is made if the maximum bearing capacity is needed, but the weight of the entire structure should not be large.

Such a profile is, of course, the apogee of strength and endurance. Why not take one right away, even if you have the simplest pitched roof? But the price! It's just a waste of money. And, instead of overpaying for excess strength and durability, it is better to invest these funds in the purchase of a more suitable profile, but with a good, quality coating which will protect him from any hail.

Choice by coverage

Modern corrugated roofing is made of galvanized sheet, which is more budgetary, or polymer-coated metal, which is already more expensive, but more durable and reliable.

The coating of the profiled sheet is also of great importance, especially when it comes to roofing. Indeed, in addition to the zinc layer, additional coloring is desirable for the roofing profiled sheet, which also directly affects the individual qualities of the coating. Here is the classification:

• Matte and glossy polyester, which gives the coating even greater strength and reliability, resistance to fading and cracking. This is a glossy polyester paint, with a rich choice of colors and relative cheapness.
• Protective polyurethane metal coating from frost.
• Polyvinylidene fluoride.
• Plastisol is polyvinyl chloride with plasticizers that are resistant to almost any mechanical, thermal and chemical effects, and also perfectly imitate the texture of wood and leather.
• Zinc is cheap and cheerful, however, it is not at all durable.
• Aluzinc - coating, which includes silicon by 1.6% and aluminum by 55%. The result is excellent protection against scratches and darkening of the paint over time.
• Matte polyester is a combination of polyester and Teflon, which creates a more wear-resistant coating method.
• Pural is a polyurethane-polyamide paint with a pleasant matte-silky texture, which gives the life of corrugated board up to 50 years without fading and loss of other qualities.
• PVDF is a polyvinyl difluoride-acrylic paint that provides excellent protection against chemical and ultraviolet exposure, which is important for regions with severe environmental pollution.

To understand what exactly the sheet is covered with, special marking will help. For example:

• Profiled sheet marked "A" is covered with aluminum.
• Steel sheets marked "AK" are covered with aluminosilicon coating.
• Sheets marked "AC" have a less durable aluminum-zinc coating, in which there is only 4% aluminum.
• The marking "EOCP" means that the sheet has been hot-coated on both sides.

If for ordinary corrugated board there is no significant difference with what it is covered, then for roofing it is a key indicator, because such corrugated board is constantly under the influence of the external environment. Therefore, choose a roofing and based on what protective layer was used.

Choice by quality

And now about how not to purchase a profile with a thickness of 5 mm and get 3.5 mm, which will corrode in the first year. What is the problem? In fakes!

When choosing a quality profile, pay attention to the following points:

1. Sheet thickness. The thinnest products are clearly of dubious origin. Note that it is difficult to visually determine handicraft production, and even with a micrometer it will be possible to measure the thickness of the sheet already with the coating. So, for a roof, it is desirable that the thickness should be 1.15 mm, zinc should be from 140 grams per square meter. What to do? Contact only trusted dealers or directly to the manufacturer.
2. The quality of the raw materials used. So, for example, the Russian manufacturer Metalloprofil produces profiles from metal of various origins - Cherepovsky, Novolipovsky, Korusovsky and others. All this feedstock has a different degree of galvanization, but within the limits of GOST. And you can ask for a certificate of quality. And from what the nameless profile is made, with which the market is littered - a difficult question.
3. The inside of the sheet. It should not have any streaks - only a uniform pure color throughout the mass of the sheet. Coverage is very important! You do not want the first hail to completely spoil the appearance of the roof, do you?
4. Package. If the sheets are simply folded onto a regular bar and hand-wrapped with film, this is not quality. When you bring (or will be brought to you) such building materials, you will find sickly scratches due to improper protection, and in the end you will reject at least one sheet from each package.
5. Compliance with the necessary criteria. We have already told you how to choose a specific profile for your needs - and be guided by this. And in no case do not trust unscrupulous sellers who will try to convince you to take a worse profile (after all, your neighbors allegedly bought the same one, and nothing). The wrong choice is also a bad profile!

Good luck with your purchase and happy installation!

Profiled metal sheet, shortly called corrugated sheet or corrugated board, belongs to the category of building materials for universal use. With it, you can build fences, clad the facades of building structures, use it as part of sandwich panels. They also use corrugated board for arranging the roofs of private houses.

The question - which corrugated board is better for the roof - is not at all idle. The choice of material is complicated by the variety of manufactured sheet modifications. If we want to understand which material to choose, we should understand the performance of its various types and conduct a comparative analysis of technical characteristics.

Roofing from corrugated board can have quite a decent design

Features of the use of corrugated roofing

The widespread use of corrugated board as a roof covering is due to its excellent performance and low cost. The professional flooring represents the galvanized metal sheet made by method of cold rolled steel. The product has high mechanical strength, which is enhanced by stiffening ribs on its surface, which have a trapezoid or wave shape in cross section.

Profiling is carried out on machines with forming rollers, then a double-sided protective coating is applied to the surface. The applied manufacturing technology determines the high performance of an inexpensive building material. The use of corrugated board in the arrangement of the roof has the following advantages:

• ease of installation;
• long service life;
• fire and environmental safety;
• light weight;
• variety of colors;
• the ability to perform a coating without joints.

It is very convenient to cover the roof with long sheets of corrugated board

Corrugated board as a roofing can be used on almost any roof with an angle of inclination exceeding eight degrees. A soft coating is laid on flat roofs, as atmospheric moisture accumulates on them, which quickly starts corrosion processes in metal sheets.

The standard length of the sheet allows you to make a surface without butt joints. Another advantage is the absence of an unpleasant odor, unlike many other modern materials.

The disadvantages include strong heating of the coating by direct rays of the sun, a hot summer day and you can get burned when touched. In addition, the sound of raindrops drumming on the roof is clearly audible in residential areas.

Grades and properties of profiled sheets for roofs

The answer to the question of what material is better to cover the roof is largely determined by the technical parameters of a particular material. Performance characteristics profiled sheets differ in accordance with their thickness, which determines the weight per square meter of the coating, the geometric dimensions of the profile, the properties of the protective coating and its color design.

This profile is best suited for the roof

Usually, the letter "H" marks products that can withstand an increased load-bearing load, "C" - used for arranging wall ceilings, universal-purpose products are marked with the letters "HC". And what brand is best for arranging the roof?

A profile with a low shelf is best used on a roof with a large slope

For laying on the roof, it is best to use profiled sheets with the index "H" and "HC", they have geometric profile dimensions that provide high resistance to load-bearing loads, which is an important characteristic for a roof on which snowdrifts form in winter.

Probably, such a shape of the profile will make it possible to implement the planned roof design.

The classification of the profiled sheet into bearing, wall and universal is rather arbitrary. In specific operating conditions, the height and shape of the profile, as well as the thickness of the sheet, should be taken into account.

Geometric dimensions of the profiled sheet

The main geometric parameters that determine the mass of the profiled sheet and other technical characteristics are its width, length and thickness, as well as the shape and height of the profile. The main types of profiled metal sheet with their geometric dimensions are shown in the photo.

The geometric shape of the sheet is described by a set of numbers, the first of which shows the height of the profile, the second - the thickness of the sheet, the third - its width, the fourth - the length. For example, the alphanumeric code H is 23.0.5. 750. 11000 designates: profiled load-bearing sheet, profile height 23 mm, sheet thickness 0.5 mm, width - 750 mm, length - 11000 mm. The length, thickness, weight, width, pitch and height of the C 21 corrugated board profile are shown in the following table.

Rolling machines allow the production of profiled sheets twelve meters long. Usually they are cut into six-meter strips for ease of transportation. Manufacturers of this type of product in the technical documentation indicate two sheet widths. This is due to the fact that the designated parameter may vary depending on the height of the profile, thus, there is the concept of the total and working width of the sheet.

The calculations take into account the so-called useful dimensions that remain after overlapping the edges of the sheets.

Material thickness

One of the most important operational parameters of corrugated board is its thickness. It determines the cost of one square meter of coverage to the greatest extent. The duration of operation of the roof made from it directly depends on this parameter of the metal sheet.

An increase of one tenth of a millimeter extends the service life by approximately five years. In addition, the ability to carry load-bearing loads is increased. A sheet of corrugated board with a thickness of 0.7 mm can withstand two hundred and ninety-five kilograms per square meter, and eight tenths of a millimeter - already four hundred and nine kilograms per square meter.

Decking of sufficient thickness will withstand the load of snow even on flat roof

The thickness of profiled metal sheets varies from 0.3 to one millimeter. For roofing, the optimal value of this parameter is 0.5 or 0.45 mm. At first glance, it seems that such an insignificant thickness of the metal does not provide the necessary strength, but due to the presence of stiffeners, a team of installers moves along such a coating without damaging it.

Coating and color of corrugated board

Protective coating of corrugated board prevents the development of corrosion processes in it and protects the corrugated board from the aggressive effects of the external environment. There are the following types of coverage:

• Good value for money galvanized. The disadvantages include strong heating in direct sunlight. This creates problems in hot summers, so it is most advisable to use this option for arranging the roof of outbuildings, barns, garages, and so on.
• Aluminum-silicon with excellent resistance to aggressive influences. Outdoor pavilions and gazebos covered with such material serve for a very long time.
• Pural, which increases resistance to negative temperatures and ultraviolet radiation. This effect is provided by polyamide components.
• Polyester with a glossy and matte surface. It is resistant to color fading, low cost, but has low mechanical strength and easily chipped.
• Plastisol withstanding significant changes in ambient temperatures. Notch in the form of strokes and relief embossing increase the reliability of this type of coating.

Far from a complete list options corrugated board coloring

Important in choosing color solution corrugated board. In addition to the fact that the color should be practical and not cause much effort to maintain, harmony with the surrounding landscape and general architectural solution the buildings. You should not use green if the house is located in a dense garden. Coloring is carried out according to the standards designated by Latin letters RAL, HTS and RR. The most convenient German RAL color marking system.

In the described scheme, the primary colors are indicated by the first digit of the individual code. For example, about thirty yellow options correspond to one, thirteen orange options correspond to two, twenty-five red options correspond to three. There are about ten basic colors, and they form a palette that exceeds a thousand shades. Such a wealth of color options allows you to realize any design ideas.

Roof slope and material consumption

Profiled metal sheet is used only for pitched roofs. Apply them to flat roofs impractical, since water accumulations are formed there, which will lead to a quick start of corrosion processes, first at the attachment points, and then, literally, everywhere.

When longitudinally placing several sheets on the roof, and not one whole, it is important to take into account the slope of the roof slope. The consumption of material depends on the angle of the roof, since depending on this parameter, the degree of overlap of the sheets of corrugated board changes to form a reliable surface. It should provide unhindered rolling of rainwater and melted snow.

When installing the roof, unsuitable trimmings of corrugated board will inevitably appear.

With a decrease in the angle of inclination, it is necessary to increase the amount of overlap of sheets in the horizontal direction. This leads to a decrease in the usable area. The same can be said about the overlap in the vertical direction: the smaller the slope, the more waves overlap with each other.

A roof slope of less than ten degrees requires an overlap of about 0.3 meters and additional sealing of the joints. Up to fifteen degrees - 0.2 meters, up to thirty - 0.17 meters, above this value, the overlap can be from 100 to 150 mm. The specific degree of overlap should be taken into account when calculating the amount of material required to complete the job.

Profiled sandwich panels

Sandwich panels got their name from the English name for a multilayer sandwich. In accordance with this, they are a structure made of a metal profiled sheet and a heater connected to it.

The combination of a tough, durable outer layer and high-quality insulation improves the performance of the material and its area of ​​​​use. Sandwich panels are often used in prefabricated modular building structures as wall panels.

Examples of sandwich panels using corrugated board

They can significantly reduce the thickness of the walls and, accordingly, reduce the load on the base of the building. In addition, installation is simplified, and the construction time of the building as a whole is reduced. They are also used for arranging a warm roof. Sandwich panels made of profiled sheet have the following advantages:

• ease of transportation and installation;
• resistance to moisture;
• excellent decorative properties;
• heat-saving and soundproofing qualities;
• fire safety;
• long period of operation.

Sandwich panels designed for roofing are equipped with special locking joints. They prevent the penetration of water into the structure and allow you to successfully withstand wind and snow influences. There are two-layer and three-layer sandwich panels. Two-layer - used for arranging the premises in which it will be performed decorative trim surfaces. Three-layer - do not require finishing of the roofing from the inside.

The following practical recommendations will help you choose the right profiled metal sheet for specific purposes. You should not make the main criterion for choosing a product its cost, so you can buy simply unsuitable material.

It is necessary to determine the scope and features of the operation of the metal profile and, based on this, choose the desired modification. For example, the use of a carrier profile for arranging a fence cannot be justified from any point of view.

On the roof of corrugated board, snow retainers are very relevant

Choosing the type of coverage, you should not be guided by the simple desire to have a roof or a fence of a certain color. You need to understand that, in addition to decorative qualities, the coating has a functional purpose: it comes in different thicknesses, differs in application technology, and so on. It is necessary to understand these nuances. Both matte and glossy types of coating are popular, the former being considered more reliable.

Particular attention should be paid to the thickness of the metal sheet, because its cost and service life directly depend on this characteristic.

One more practical recommendation is that you should not use the services of online stores to purchase a metal profiled sheet. It is impossible to assess the quality of the products offered by the photos published on their websites. It is much better to place an order at the office of a reputable company, after making sure of the quality of the goods.

Decking is one of the most inexpensive and beautiful roofing materials. Reliable, durable and has the classic design that will never go out of fashion. But it is not uncommon for rusty streaks to appear on a new and bright roof after two or three years.

Therefore, let's study in more detail the question of what kind of corrugated roofing is needed, what is its advantage over other roofing materials, in what formats it is produced and how to understand complex markings.

Galvanized steel is one of the most widely used and cheapest materials in construction. And the corrugated board is made just from it: by cold rolling and subsequent decorative and protective polymer coating.

Profiling can create a wavy, U-shaped or trapezoidal shape in such a sheet. But this is a necessary measure, and not just an aesthetic effect - this way the strength and rigidity of the sheet increases at least three times. That is why such a simple and inexpensive sheet turns out to be quite a decent roofing material.

Second important point– the corrugated board is made of steel and does not give off any strong unpleasant odors, like some of the modern roofing. Easy to cut, easy to install. In addition, it can be laid on any roof, the slope of which is not less than 8 °, and the slope does not exceed 20 meters.

And one of the most important advantages of corrugated board as a roofing is its weight. After all, working on a steep roof with heavy, albeit more beautiful, material is difficult and unsafe.

Decided on just such a roof? Then it remains to purchase high-quality, durable sheets with the desired characteristics!

Types of modern corrugated board

The first thing you need to pay attention to is the type of coating, the wave height and the width of the corrugated sheet. Not every type of roof is suitable for a roofing device, this is important!

Marking

The height of the corrugation for roofing corrugated board is acceptable within 10-114 mm. Just based on the height of the corrugation and the thickness of the sheet, three types of corrugated board can be found on the modern construction market:

• Facade class C, which is used for the construction of fences and wall decoration.
• Bearing class H, which is used for cladding walls and partitions.
• Roofing, which just trim the roof. This is the NS class.

More details on the picture:

On the modern market the most common marking sheets are H45, H75 and H114. On sale you will find sheets C10, C20, C35. The profiled sheeting of class CH is called bearing, wall, because. it is already used for the construction of roofs and solid fences. Its profile height is from 35 to 44 mm.

This diagram will help you understand:

If at the end of the marking you did not find the GOST inscription, then this batch was made according to a different standard. In addition to all this, marking A and B indicates the presence of painted sides, and R indicates the presence of a capillary groove.

Manufacturing technology

There are different types of corrugated board according to the manufacturing technology:

1. Rolled products with aluminosilicon coating.
2. Sheet metal with aluminum-zinc coating.
3. Thin sheet aluminized rolled products.
4. Sheet steel with zinc coating.

For example, AC is thin-sheet rolled products with an aluminum-zinc coating, and AK is the same technology, but with an aluminum-silicon coating.

Here is an interesting video about the production itself:

Please note that some models of corrugated board and more expensive metal tiles can be made on the same machine, but they will still differ in their qualities. It’s just that some models of corrugated board are universal. Such, for example, can be called S-20 corrugated board: PS-20 - wall corrugated board, and PK-20 - roofing. It's just that the same roll for the manufacture of the wall version and the roofing one is placed on different sides. And there is only one rental. In other words, this is the same profile, but with the reverse side.

Coating quality

Decking today is available in two types:

1. Made of thick galvanized steel, 0.5-07 cm.
2. Made of thinner galvanized steel (0.5 cm) with a modern polymer coating.

And the quality of the polymer coating of corrugated board can also be different. For roofing, the following are considered suitable:

• Polyester. Excellent decorative qualities, but poor protection against mechanical damage. Abrasion and flaking are its main problem.
• Pural. It is just as bad in wear resistance as polyester, but it costs much less.
• PVDT, or polyvinyl difluoro. Excellent qualities strength and light resistance, rich decorative range. The cost is higher.

For corrugated board, both sides of the sheet, one of the sides or none are painted:

Price formation

The total price of roofing corrugated board depends on the following sheet parameters:

• The presence of a zinc coating.
• The presence of color.
• The presence of a protective coating.
• The length and width of the sheet.
• Sheet thickness.
• Corrugation height.
• Appointment of corrugated board.

Here is a rich choice in front of you!

What kind of corrugated board can be covered with a roof?

And now about what types of corrugated board are currently available specifically for roofing, and why one of them is better than the other.

There is a GOST regarding such coatings: "Profiles of building steel sheet bent with trapezoidal corrugations." It says that the thickness of the sheets should be from 0.4 to 0.6 cm.

In practice, most often, a profile sheet from 18 to 35 mm thick is used to finish the roof. Traditionally, this is the HC grade, which has the most optimal stiffness, rib height and sheet thickness.

In addition to the main options, the following sheets can also be used as roofing material:

• Galvanized profile without polymer coating. Costs 40% less, suitable for roofing outbuildings and garages.
• Ferrous metal corrugated board, also uncoated.
• Expensive and durable corrugated board made of non-ferrous metals: copper or aluminum. The rarest variant.

And even a kind of exotic. So, a special corrugated board for the roof happens:

1. Made by cold rolling.
2. Bent to desired shape.
3. Perforated.
4. With spectacular textured wood or stone embossing.

You can give preference to any option you like, as long as one important requirement is met: all products must have a quality certificate.

Sheet format

So, the design and shape of the profiled sheet has been chosen, it remains only to build the crate and determine the dimensions of future sheets:

And at this stage, let's deal with the terminology a bit. So, the "waves" go across the slope, and the "rows" along, and the distance between the rows is called the pitch of the corrugated board. But “modules” are sheets that consist strictly of six waves and have a step of 35 cm. Now you understand what single-module sheets on the market are, three-module, six-module and ten-module, which are also called “warehouse” in another way. Those. standard.

Of course, the roof of your house is not the roof of a warehouse according to Soviet drawings, and such “modules” cannot be laid out to zero, without residues and the need for cutting. That is why it is fashionable today to order roofing sheets by individual sizes although, of course, you will have to pay extra for this. But the risk of corrosion on the roofing will be significantly reduced. In the everyday life of roofers there is also such a term as "lower cut". These are the lowest 50 mm of the sheet, which can be measured from the cut line to the crest of the wave. This value is 50 mm for standard stock sheets and up to 300 mm for special orders.

By the way, if the slope on your roof exceeds 6 meters in length, then, so that the corrugated board does not bend, it is better to order the material twice as short. For example, 3 meters each, taking into account the overlap, which for corrugated board is 100-150 mm. Every second wave will need to be fixed under the transverse pattern

What to do with sheets after purchase?

The first step is to properly transport:

Yes, and you also need to store the purchased corrugated sheets correctly. It is not uncommon for roofing material to be brought to the construction site either ahead of schedule or before the rainy season. Then it is better to find a flat place, and fold the sheets so that there are bars of 20 cm in cross section between them. Each stack contains no more than 10 sheets! You don't want this expensive material to deform and become unusable before installation begins, do you? Therefore, approach this issue with responsibility.

If on the spot it turned out that some sheets still have to be cut - do not worry! You can easily handle this on your own. For this purpose, use ordinary metal shears (as an option - a hacksaw) for carving along the length, and for the formation of bevels - an electric saw with special teeth made of hard alloys. And here grinders with abrasive wheels will lead to corrosion of metal sheets.

How not to run into fake corrugated board?

So we figured out which corrugated board to choose for the roof of your house. Agree that roofing is an extremely important stage in the construction of the whole house. Walls and even foundations are much easier to repair than roofs because of the height. Therefore, when buying a metal profile, be sure to find out what raw materials these sheets were made of. You do not burn with the desire to see this on your own roof in a year, do you?

First call: price

The most dangerous period in terms of fakes in the construction market is summer. It is at this time that everything is built - the weather and air temperature allow. It is quite difficult for large manufacturers to plan sales volumes, and it is not uncommon for the corrugated board to be out of stock at the height of construction work. This is when small handicraft firms come into play. They buy wherever they can find the cheapest raw materials - Chinese, Indian or domestic, stored for a long time in inadequate conditions and almost decomposed. Sheets are produced on home-made simple machines, which are then sold on the market as “quality material”, with a small difference in price. Most often, the buyer is offered a discount of 10-20% of the cost of "the same corrugated board as a large manufacturer, why overpay for a brand?".

So the first warning sign is the price. And it is formed depending on what was the purchase cost of raw materials - one ton of galvanized steel roll. From expensive raw materials, expensive corrugated board is produced, and from cheap - cheap. And then the price is already formed from how thick the sheets themselves will be. That is why, if the manufacturer offers you a relatively inexpensive corrugated board of normal thickness and with supposedly high technical specifications- only cheap raw materials, Chinese or Indian, but not European, could go into consumption. You can check your guesses at the office of the trading company by asking to see certificates and taking samples of the material.

But the fact that the raw materials themselves cost the scammers literally for a penny, the buyer may not know - for him, the price is sometimes set not at all a penny ...

Second call: promises

The second wake-up call is promises to fulfill the order too quickly, i.e. make sheets of the right size. Yes, there are always intermediaries between any major manufacturer and buyer - at least two. And it is from them that you order the goods. But in any normal company they will not bring it to you earlier than 10 days, but on the market they will promise much faster, after which they will break the deadlines and explain their behavior by a breakdown of some line.

Third bell: fast delivery

Even more often, the buyer is forced to buy ready-made sheets, only at a price much higher than standard ones are sold. Actually the seller quality material, who cooperates with a real manufacturer, will immediately say that it takes time and will not impose what is already lying around.

But the biggest deception is that fake corrugated board is also thinner than the declared parameters. After all, 99% do not have a micrometer available and certainly do not know how to use it, and as a result, the roof of their house is covered with material much thinner than required by the rules. The deviation that is permissible is only 0.05 cm, i.e. 5 cm, but no more. If you run into scammers, get a micrometer and get ready for a shock.

But we hope that our advice in choosing corrugated roofing will help you avoid all these annoying mistakes, and your roof will be the brightest and highest quality in the area!

To cover the roof today, the most various materials, they all differ not only in appearance, but also in their characteristics. One of the most commonly used today is a metal profiled sheet, the so-called corrugated board. It is produced by cold rolling, in this way it is given a characteristic appearance. Outside, the metal is covered with a layer of protective zinc and polymer. However, there are many options for corrugated board, they are all designed to perform different jobs. Choosing the right one is quite difficult, but it must be done. What decking is better? What exactly do you need to pay attention to?

The advantages of corrugated board over other roofing materials: corrosion resistance, low cost, the possibility of laying on top of old material, ease of processing and ease of installation.

Characteristics of corrugated board

To cover the roof, a special bearing or wall steel sheet is used, characterized by the following characteristics:

Components of the corrugated sheet layer: steel, zinc, polymer coating.

• reliable weather protection;
• light weight, which makes it possible to install a profiled sheet for any home. The installation of such a roofing can be carried out without the involvement of heavy construction equipment. This makes construction more economical and faster;
• the sheet itself is quite durable, it is resistant to ultraviolet, acid rain.

But when choosing, you need to pay attention not only to such advantages, but also to the parameters of the sheet itself. The material must be designed specifically for roofing, it must have a certain thickness, wave height. Today it is easy to determine this, manufacturers apply special markings that allow you to quickly select exactly the corrugated board that you need.

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Product range

Another name for profiled sheet is profiled metal, that is, a sheet passed through a special rolling machine. The first samples of such materials were obtained as early as 1820, when the steel sheet was given wave-like shapes by cold rolling. Since then, the technology for the production of such metal flooring has constantly improved, today you can purchase a truly versatile material that has the highest performance characteristics.

For corrosion protection outer sides steel coated with zinc, often there is an additional polymer coating.

Table of types of load-bearing corrugated board: characteristics, applications.

Such corrugated board is used for a variety of works, it is especially popular for the construction of fences, they can cover the roof. The scope of the material is quite wide:

• professional sheet is used for the roof of the house;
• for the construction of fences;
• to perform a load-bearing floor during the construction of a residential building;
• as a facing material for walls and facades, plinth;
• as fixed formwork for many monolithic structures.

Which roof decking is best? Today, manufacturers offer a wide variety, but not every type can be used as a roofing. The product range includes the following grades of profiled steel sheets:

• "C" is used for wall cladding, fence construction, for the roof of the house;
• "NP" has a large thickness, it is used for facing walls, roofing, fences, construction of outbuildings;
• "NS" is most often used in wall cladding and in the construction of low fences and enclosing structures;
• "H" is used for building floors at home, when installing fixed formwork. It can be used in the construction of a garage, barn, high fence.

The letters in the name of the material mean:

• C - wall, that is, intended mainly for walls;
• H - flooring, used to cover the roof, make ceilings;
  CH - universal, can be used to perform any work, you need to pay attention to the shape and height of the wave.

There are other special types of profiled sheet that can be used for specific jobs. When marking, after the letter there is an index indicating the height of the profile, then the parameters of the thickness, width and length of the sheet are indicated.

The polymer coating can also be different. When choosing corrugated roofing, you need to be guided by the type of paint that can withstand various loads. It is preferable to take matte polyester for roofing, but there are other options. On this basis, the following classification was adopted:

• acrylic coating - denoted by AK;
• polyvinyl chloride coating - PVC;
• polyester - PE;
• polyvinylidene fluoride - PVDF;
• polyurethane - PUR.

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What is best for a roof?

So what kind of corrugated board is best for the roof? It is easy to answer this question if there is a complete package of project documentation, where specialists not only calculated the quantity, but also the type of material, the load that it must withstand. And if you need to buy the material yourself? If you buy domestic material, then you need to take a sheet marked "H", that is, bearing. In extreme cases, “CH” is also suitable, which is slightly thinner, but its strength and reliability have shown itself well. In any case, this corrugated board is suitable for covering the roof.

The choice should be made based on the climate zone in which the building is located. With constantly changing temperatures, high levels of humidity, frequent rains saturated with acid, and atmospheric fog, it is necessary to take corrugated board, which is made of steel. Galvanization in this case is applied by a galvanic method, which allows it to withstand extremely unfavorable operating conditions. But zinc alone does not provide all the necessary protection, so for roofing it is best to choose a material that has a special polymer coating. On the roof of the house, experts recommend taking a profiled sheet covered with polyester. It has good resistance to adverse conditions of use. Such material is marked "PE".

When buying corrugated board, you should not be guided by its attractive appearance, since this does not give a guarantee of quality. The seller must be asked for documentation confirming the type and characteristics of the metal sheet, the polymer paint used for coating. You also need to pay attention to the state of appearance. The corrugated board for the roof should not have cracks, chips, traces of marriage or careless transportation, roughness. The surface on both sides must be smooth and durable, free of scratches and dents. All this will further contribute to the development of corrosion.

Among the wide range of roofing materials that are used today, corrugated board stands out. But many consumers are poorly oriented in the intricacies of such material and evaluate it simply by its appearance. That is why very serious mistakes are made.

Peculiarities

Roofing corrugated board always meets more stringent requirements than the wall version of this material. But it is used in a variety of cases. It is one thing when you need to cover the roof of a solid cottage, another thing is decorating a private house, and the third thing is when work is underway on a temporary building. You always need your own approach. In any case, corrugated roofing is superior to many other materials in terms of such parameters as:

• corrosion protection;
• ease of transportation and installation;
• low weight and versatility in use;
• environmental Safety;
• minimum maintenance requirements.

But users will have to reckon with possible difficulties. Only with the use of reliable sound insulation is it possible to defeat the "loudness" of a professional sheet. It must be transported with great care, because the material is deformed very easily.

It is required to mount the coating carefully and carefully - the slightest flaw can devalue all the work. If the integrity is violated, the inner parts of the cake will come into contact with water and quickly collapse.

Options

When choosing a corrugated board, you should first deal with the following characteristics:

• type of coverage;
• wave;
• sheet width.

Corrugation for roofing material can have a height of 1 to 11.4 cm. The type of construction that meets the requirements for height and width is marked with the letters HC. Most often, corrugated board is made in accordance with state standards, as evidenced by the mention at the end of the marking entry. In the absence of such data, the product must comply with some other of the legitimate standards. The letters A, B show which side of the profiled sheet is painted (front or back).

If R is present on the label, the product has a capillary groove. As for the production technology, corrugated board is made in four main types. In addition to galvanized thin sheet, there is also a thin sheet with an aluminum shell, with a mixture of "aluminum-silicon" or "aluminum-zinc".

Even if two different models produced on the same installation, they may have dissimilar characteristics: often wall and roofing products are produced in one cycle. Galvanized steel is considered thick at a value of 5-7 mm; thinner products are necessarily covered with a polymer layer.

Depending on the type of polymers used by manufacturers, different options can be distinguished. So, polyester is outwardly beautiful, but almost does not protect against mechanical defects. Flaking and abrasion over time is almost inevitable. Pural is similar in its characteristics to polyester, but more affordable. The relatively expensive version of PVDT is both durable and resistant to direct sunlight, and has a rich color range.

Metal slate is stronger than asbestos-cement sheets and much better than plastic panels tolerates intense heat. It is distinguished by the application of zinc on both sides of the sheet at once, the use of a specially selected varnish on the reverse side and the addition of coloring pigments to the polymer.

The plastic layer helps to ensure resistance to UV rays, liquid and minor mechanical defects. They will remain on the surface and will not grow in depth or in breadth. All these features make metal slate one of the main options for decorating the roofs of houses.

Sheet characteristics

In modern factories, sheet steel is made with different depths of the zinc layer. Consumption of pure zinc during operation production plants can be from 0.1 to 0.3 kg per 1 m2 in the coefficient. The minimum film thickness is always at least 90 microns (that is, from 275 g per 1 sq. M). Such a shell is able to protect the main body of metal from corrosion for 15-20 years even under harsh operating conditions. But due to the development of technology, even this level can no longer be considered an ideal choice.

Galvanized profiled sheet has now almost ceased to be used on the roofs of houses, and is used mainly on temporary structures and outbuildings. The high cost of modern varieties of this material is apparent: there the sheet lasts longer, and significantly, and outwardly much more attractive.

According to builders, the optimal thickness of corrugated roofing is 0.45-0.5 mm. An increase in the wave height compared to the wall counterpart already makes it possible to guarantee the necessary strength.

If snowy winters occur in a particular area, it is better to use thicker metal. According to GOST, the permissible deviation in the thickness of the corrugated board does not exceed 0.1 mm.

As for the choice of color, here you need to focus not on fashion and not on your own taste, but on the objective requirements of design. In recent years, a professional sheet has become more and more in demand, imitating the appearance of natural wood or other natural coating. But this option is bad on the roof because it is poorly combined with others. decorative elements and can quickly become frustrating.

Given the inevitable distortion of coloration when displayed on monitors and in print, it is worth choosing a tone "slightly lighter than the correct coloration appears."

Construction types

When the profiled sheet is chosen in accordance with all the rules, the final success cannot yet be considered a guaranteed affair. After all, you need to thoroughly understand the intricacies of the roof being created and its structure. The cold format of the roof is considered the most effective, because a layer of air is created in the under-roofing room, which ventilates the roof itself and the rafters. But it is impossible to do without insulation in constantly used residential buildings. Device cold roof from corrugated board implies the use of:

• rafter legs (from boards with a section of 5x15 cm or metal);
• waterproofing;
• counter-lattices;
• crates (boards 4x10 or bars 4x4 cm) divided or inseparable;
• actual corrugated board.

The technology of creating a warm roof from corrugated board requires the use of thermal insulation in the gaps of the rafter legs. These gaps are most often filled with mineral wool, and under the rafter system there is a membrane that restrains the flow of steam. Since the roofing material blocks water vapor, it is absolutely unacceptable in this case. It is advisable to lay corrugated board in both cold and warm versions only on slopes from 8 degrees and steeper. With an insufficient slope, water will begin to pour into the horizontal joints and quickly flow onto the heads of the residents of the house.

If you have to cover the roof at an inclination of less than 8 degrees, the sheets overlap each other with an overlap of 20-25 cm. The use of silicone sealant helps to minimize the risk of leaks.

For your information: the lower the steepness of the roof, the greater the amount will have to be spent on its processing.. Even with slopes from 9 to 15 degrees, it is impossible to overlap less than 20 cm, but the use of sealant at the joints is left to the discretion of the builders. Roofs with slopes from 15 to 30 degrees can reduce overlaps to 15-20 cm, and on even steeper sections this figure drops to 0.1-0.15 m.

Roofs with a small slope of corrugated board should be made on a wooden crate made of edged lumber or from moisture-resistant plywood. When the steepness increases, the allowable distance between the key nodes of the crate also increases.

It is unacceptable to lay a profiled sheet on roofs whose steepness exceeds 60 degrees.

The largest gap from one rafter leg to another in any scheme cannot be higher than 150 cm. Under a warm roof, this distance is reduced to 1.2 or even 0.6 m to simplify the installation of thermal protection. The choice of sheets that match the length of the slope will help minimize the number of joints. But their greatest length is no more than 10 m. If you build up the structure further, it becomes unstable.

A gable roof for corrugated board can be made with hanging rafters, but a layered one (leaning equally on internal and external walls) is also allowed. It is advisable to attach the sheets using roofing screws, supplemented with a sealant. The neoprene washer, flattening, makes the resulting hole as airtight as possible.

• skates;
• pipe outlets;
• slope connections;
• valleys.

Similar elements can also be used on a shed roof, they are painted in the same color as the profiled sheet itself. Therefore, the mounted products do not spoil the appearance, it is unlikely that anyone will notice them at all. The appearance of the roof, finished with corrugated board, differs from the options for tiles.

For metal tiles, thinner steel is used, although it is obtained using a similar technology (cold rolling). Both materials can hardly be called particularly heavy, while additional tenths of a millimeter for both can give the roof several years of life.

In order for the cake to last longer and not have to prematurely dismantle the outer shell, it is necessary to impregnate the crate with flame retardants and antiseptics. Regardless of the tightness of the roofing, water will still find its way in. And it is better that the lowest details of the structure meet it “fully armed”.

When it turns out that the slope is longer than the technically permissible profile sheet, an order must be made with the expectation that the fixing point of the transverse joint is above the batten board. The edge of each subsequent stacked sheet should cover the capillary drain of the previous one.

Manufacturers overview

Roof decking is produced by a large number of manufacturers, but not everyone has the same conscientious approach. The machines and their modes of operation differ, the raw materials and the applied coating differ. Judging by the reviews, the best quality of the profiled sheet has been achieved in Russia - it is made in the Lipetsk region, in Magnitogorsk and Cherepovets. But Turkish, Chinese and Indian materials are many times worse.

Important: profiled sheet with imitation of natural stone, brick and logs is made exclusively in South Korea and nowhere else, everything else is fake.

Among foreign suppliers, the leading Western European concerns are in the first place:

• Rautaruukki Group;
• Arcelor Construction;
• Tekla and a number of others.

You can not limit yourself to just the name and type of profile. The correct selection of a profiled sheet takes into account what area needs to be covered, and how the roof is configured, how many slopes it has. The average volume of precipitation, the difficulty of installation, the laboriousness of replacing a damaged sheet are taken into account. For the house, it is worth choosing a material with the highest possible quality, but the sheds can be covered with cheaper coatings. With an increase in the wave, the mechanical rigidity of the corrugated board and the passage of liquid precipitation down to it increase; the cost increases at the same time.

You can not put on the roof a sheet whose wave is 2 cm or less. The lower part of the wave should be as wide as possible, this facilitates the flow of water. Structures with a high wave on sloping roofs are placed with an overlap in one line, and, conversely, a small wave is compensated by a double overlap.

Products with capillary grooves act as an auxiliary barrier that prevents melt water and raindrops from getting under the sheet. The groove also partially protects against condensate, but if the wave height is chosen incorrectly, it will not be able to help.

An unpainted profiled sheet without a zinc layer rarely lasts more than 5 years, and if it is applied, the life of the product can increase up to a decade and a half. When selecting colors, it is worth paying attention to the fact that after some time even the most reliable coatings will burn out in the sun. The longer the roof is used, the stronger the visual difference becomes. This can bring an unpleasant surprise when replacing single damaged sheets with goods from the same collections. It is unacceptable to take products with chips and folds, with peeling paint.

Before buying, it is recommended to carefully measure all linear dimensions of each element. If they differ from those declared by more than the standard deviation provides, the product cannot be considered of high quality. It should be ensured that the first waves of the upper sheets coincide as accurately as possible with the closing strips of the underlying profiled sheet. Then the risk of seepage of precipitation inside will be minimal.

The separation of corrugated board at large reputable enterprises is carried out using a special machine - a guillotine. It allows you to make the most even cut, will not leave visual notches. And therefore, you do not have to be afraid that the edge of the profiled sheet will suddenly be covered with rust.

If sellers show color on round samples, then they are trying to overestimate the strength of the product, to create a false impression about it. It is always worth demanding to issue a full-fledged sheet and apply little effort to it. After this manipulation, the corrugated board should quickly return to its original position.

You can not buy a profiled sheet if a detailed specification and layout diagram are not attached to it. This moment is especially important if the geometry of the roof itself differs from the standard options. The packaging must be intact and undamaged. Before work begins, it is left in place, but then immediately removed.

The presentation of certificates, warranties, licenses and technical data sheets should always be required.

Accessories

Accessories (auxiliary details) are just as important as the corrugated board itself. Moreover, they must be selected simultaneously with the coating itself. Only harmoniously combined elements will ensure quality styling and long service life. Additional elements are designed to complete the stylistic design of the joints and save them from destructive influences. Under protection, you need to take more points of attachment to walls, windows and gables.

The more complex the configuration of the roof, the more auxiliary elements are required, including expensive fixtures. End strips are able to block the action of moisture on the joints.

And also thanks to them, the destructive effect of wind on the coating as a whole is prevented. You can set the bars as exact dimensions, and with overlaps. In both cases, an overlap of the final profile sheets of at least 5 cm is required.

The fastening of the profiled sheet to the base is provided by self-tapping screws: their roofing type helps to attach the end part to the crate or frontal board. Eaves strips contribute to the direction of the water leaving the slopes directly into the downpipes. Therefore, their use protects the facade of the house from waterlogging. The plank simultaneously becomes a decorative covering for eaves boards. You need to put it on the end boards of the crate - and the overlap overlap is at least 10 cm.

The groove bar is placed directly under the ridge, masking the ends of the profiles located below. Her role is purely decorative, which cannot be said about the flashings. Adjoining strips save the junction of roofs with walls, pipes and other vertical planes from getting wet and dusty. Sometimes engineers provide for the presence of strobes in such slats, thanks to which you can go deep into the walls.

All shaped parts must be mounted only after the arrangement of the roof as a whole.

So that the slopes located at different angles represent one whole and do not diverge anywhere, valleys are used. They, on the contrary, are placed before laying the finish coat. Additionally, these elements improve the quality of waterproofing. The upper valley covers the inner corner of the roof joints, and it is this detail that is recognized as the most difficult in terms of engineering. And the role of the ridge elements is to connect the roof fracture lines to each other; along with this, they increase the decorative qualities of the structure.

Ridge elements of a simple type - just metal corners, their width is 10-30 cm. In most cases, flanging is used, the edges are bent by about 15 mm. If possible, it is worth selecting the most rigid structures, installers really appreciate them for their simplicity. In addition to the ease of layout and fastening, the advantage is resistance to the bending action of strong winds. The U-shaped element is distinguished by accelerated installation, and the timber is initially placed, and then the skate.

Semi-circular ridges feature a flexible geometry that can be adapted to individual roofs.

Differences are manifested in the proportions of the diameter of the ribs. The end fragment must be used. For installation, always use a sealing tape placed in the gap from the ridge to the corrugated board. The use of a sealant helps to avoid penetration into the cake:

• moisture;
• insects;
• small birds.

Material Quantity Calculation

Having dealt with the device of the roof from the profiled sheet and its shared device, you still need to find out the need for stacked materials. Specialized programs will help to accurately calculate the required amount of roofing, taking into account a certain overlap. They are able to assess the necessary parameters of the roof - both together and separately.

Similar software successfully cope with even the most challenging tasks occurring in humans. Alternatively, you can contact the design organization - they not only know how to calculate everything, but also draw up professional drawings.

For the most simple options roofing, there is no need for sophisticated calculation. All preparations can be done by the owners of the house themselves. When calculating the area of ​​\u200b\u200bthe slopes of a standard form, generally accepted geometric formulas from the school course are used. Then, the calculation for the extreme elements of the roof is added to the result obtained.

When calculating, they operate not with the total, but only with the useful width of the corrugated board.

The number of stacked sheets in horizontal rows is calculated by dividing the lengths of the slopes by the useful widths of the profile sheets. Rounding up helps to avoid errors and incompleteness. The standard overlap is taken at 80 mm, but you need to pay attention to how large it is in a particular case. It is extremely important to conduct all calculations in such a way that an integral structure is created. Additionally, the values ​​​​of cornice overhangs and additional details are calculated.

The typical length of the extensions is taken to be 200 cm. Their number is determined by dividing the length of the slopes by 1.9 (based on the standard overlap). For valleys, overlap is done more, and therefore here it is already necessary to divide by 1.7. As in the case with the profiled sheet itself, it is required to round the received numbers up. For 1 sq. m, 7-8 self-tapping screws are consumed, additional elements are covered with 8 self-tapping screws per 1 m2.

Installation Instructions

Installation of corrugated board is easier and more convenient to perform if you immediately buy a kit that is ideally sized. But this is not always possible purely technically, and in such cases, a special cutting tool comes to the aid of builders. When fitting, the coating is spread on a solid, even base, most often on clean ground. Among all power tools, a drill with a disc-shaped nozzle demonstrates the highest efficiency.

When there is no electric machine, you will need to use metal shears or a hacksaw with a slight tooth.

It is strictly forbidden according to the technology to cut the profiled sheet with abrasive devices. Significant heat generation during operation adversely affects the practical properties of the laid material.

Since cutting will inevitably break the edge, you will need to think in advance about a paint that matches in tone with the main products. To lift the necessary sheets up, use logs - this is the easiest way. The profiled sheet is supposed to be mounted on hexagonal self-tapping screws 8 cm long with a sealing gasket. It is unacceptable to tighten them all the way, as this may break the waterproofing.

Sheets are attached in the lower parts of the waves, but for ridge elements and overlaps, fastenings are made in the upper ones. Experienced craftsmen mount corrugated board, moving from the end of the ramp. Lateral overlap starts at ½ wave, but on gentle slopes - less than 120 degrees - it is already 1.5 profile waves.

It is very important to equip the gable cuts in accordance with all the rules, if this is not done, the very first day with strong gusts of wind will be the last for the roof. When the sheet allowance is 5-7 cm, you need a 2.5x8 cm wind rail, screwed with self-tapping screws.

But in the absence of allowances or their insignificant size, the rail is supplemented with a wind bar that looks like a steel corner. Such a bar is fixed at intervals of 20-30 cm, with a transverse overlap of 10-15 cm. The slopes are pressed against the walls using corner bars. Whatever the connection, the materials are connected with self-tapping screws every 0.2-0.3 m. The overlap is at least 10 cm.

When repairing or replacing a roof, horses should be fixed from the angle where the impact of wind and precipitation is least. The snow barrier is especially important at the time of thaws, it allows you to avoid the rapid collapse of miniature avalanches down. Such an element is placed just below the roofing edge across the slopes. For fastening, bars are prepared in advance. Of course, for any work on the roof, safety rules must be observed.

A combination of mineral wool and a vapor barrier will help to properly insulate a corrugated roof. Nobody forbids taking other seals, but it is cotton wool that is recognized as the most powerful variety. The choice between roll and sheet options is not fundamental - they have the same thermal qualities.

You can attach a heater with your own hands in one of three ways:

• screw retention;
• thread fastening;
• adhesive bond.

Either approach requires a balance between joint tightness and minimal seal compression. After all, the blocking of cold is provided not so much by the cotton wool itself, but by the air contained in it. A vapor barrier is placed above the cotton layer, which prevents moisture from constantly circulating in the air from entering the insulation.

It is unacceptable to insulate 100% of the roof, always leave cold triangles. The area is not covered with cotton, and it will help the normal air exchange of the attic space and the outside world.

You can also install corrugated roofing on top of an existing one. The main thing is that its operational parameters are decent, and that the total load is not excessive. Since profiled sheets are relatively fragile, they should not be stacked on the ground. It is recommended to use stands made of boards approximately 2.5 cm thick, spaced in 0.5 m increments.

Subsequently, the roof must be thoroughly cleaned at least once every six months; if scratches are found on the corrugated board, problem areas are only covered with a suitable paint.

You can speed up the fastening of the material if you use a screwdriver, and not a simple drill. Joints are processed by hand riveting machines, with the help of which it is easy to place steel rivets.

Rivets made of any other metals and alloys are prohibited. It is recommended to use a special metal cutting machine. Marking and measurements are carried out with the same tools as for any other construction work.

You can attach a profiled sheet strictly using specialized fasteners. Only self-tapping screws for metal will do. By all means, mounting belts and safety devices are used, even on relatively flat roofs of the first floor in dry calm weather. If the slope is large, it is required to install special barriers in addition to the corrugated board. It is possible to move along the already delivered sheets only in soft shoes without sharp protruding parts.

Sometimes it is possible to attach profiled metal to several sheets of the bottom row, while retreating from the cornice strip by 35-40 cm. In this case, fastenings are made for every second wave. The boards at the ends are hemmed with wind corners after the final attachment of all sheets. Only at the very last stage are junction strips, outlets of various pipes and similar infrastructure mounted.

The crate is done after waterproofing. The trapezoidal profile allows the use of three types of bars:

• 30x70 mm;
• 30x100 mm;
• 50x50 mm.

The pitch of the rafters is 0.9-1.2 m. The most accurate information about the required dimensions can be found in the accompanying documents for corrugated board. A strong two-sided flooring of boards, 0.6 m distant, should be placed under the groove bar at the level of the crate. The groove made of galvanized steel should be mounted with an overlap of at least 200 mm. If the roof is flat, the joints of this element are made using sealing mastics.

The bottom strips of the grooves are initially attached at the edges (screws are screwed in there), but the final fixing is carried out simultaneously with the entire coating. At the time of laying the sheets, they need to be trimmed relative to the overhangs (in no case at the joints).

Cleaning of the laid profiled sheet from snow and ice is carried out using wooden or plastic shovels. Steel tools for this purpose cannot be used in principle. By following the basic rules for choosing, laying and handling corrugated board, you can guarantee a long service life of the coating.

except standard requirements, there are a number of subtleties when laying corrugated board on certain types of roofs. When it is placed on a four-slope house, one or two corrugations of the panel are superimposed on the placed element.

It is necessary to overlap the longitudinal recesses in the amount that is determined by the angle of inclination of the slopes and the bearing capabilities of the material. The calculation is required to be carried out taking into account how many corrugations need to be overlapped. Single panels are assembled into a large sheet using short self-tapping screws that do not penetrate into the crate.

The attachment of the metal roof as a whole to the crate is carried out with a deepening into the tree, while the fasteners are screwed through the concave sections of the corrugation. All fasteners must have the same color as the coating itself. When working on a hipped roof, the central axes of the starting sheets and slopes are initially marked. Then they try on everything at once, achieving alignment of the axes and drawing lines of cuts. Further sheets must be measured and cut to actual size.

When working with a hip roof, the first sheets are mounted, achieving the coincidence of the edge with the farthest edge of the right or left racks in the ridge runs. The starting product is not cut along an oblique path, it must be placed on the entire height of the roof. Only panels in contact with oblique hip ribs are supposed to be cut. Tent constructions imply the same scheme for cutting sheets on each slope. In the case of a hip roof, the end slopes are covered with material cut according to the “tent” pattern, and the long ones also require a little cutting.

The height of the sheets is calculated according to a carefully thought-out scheme, trying, whenever possible, to close the hip rib 100%. The layout of blocks on a triangular slope is made from the middle, and on a pentagonal one - from the extreme point of the ridge runs.

In any variant of work, with any type of roof, one should strive to limit the number of parts, the width of which is inferior to the size of the sheet by more than 50%. Each such section turns out to be weakened, since the number of connection points increases. The height of all profiled panels is increased by the width of the overhangs above the eaves.

Already at the time of design, it is necessary to decide whether the installation of gutter holders will be carried out before placing the corrugated board or not. The difference is due to the fact that in the first situation, long brackets are used, and in the second, shortened hooks. Roofing pies under the profiled sheet are made with one or two ventilation circuits. Their number is determined by how the waterproofing is done.

The waterproofing layer under the steel roof with an outer polymeric layer must be free of bitumen.

The very first circuit is placed in the interval from insulation to waterproofing - provided that water will be held back by a plastic film or anti-condensate material with a fleecy surface. But under the diffusion membrane, it is not necessary to create a ventilating passage, it will itself release excess moisture as soon as mechanical stress occurs. As for the second ventilation line, which separates the waterproofing from the metal, there can be no two opinions - it is needed in 100% of cases.

The scale of the ventilation gaps is selected in proportion to the areas of the slopes. Usually this proportion is about 1%.

If the outflow and the air intake channel are separated, the resulting figure can be divided in half. In the case of a gable roof, the values ​​obtained are identical, and for a four-slope roof, the difference is eliminated by adding an aerator. Rafters for profiled steel are made from the corners of channels, laths - from square pipes or a profile in the shape of the letter P. When work is carried out on a residential building, it is undesirable to use metal truss systems. Much better for corrugated board fit wooden bases especially since they are much easier to work with.

Laths under the corrugated board are placed at the same distance. It is necessary to reduce the distance only where it is necessary to strengthen the structure. This is required along the cornice overhang, the perimeter of which is weakened for further installation of the snow retainer, as well as: