Metal profile sheets – universal material, characterized by ease of installation and optimal strength characteristics. When choosing corrugated sheeting for a roof, facade cladding, roofing or creating a modular structure, it is important to focus on the thickness of the sheets, type of coating, wave and other points. Which corrugated sheeting should you choose to start building a roof? Consider the Features roofing material, its main qualities, and start arranging the roof.

Features of corrugated sheet production

The standard sheet is made of steel with a thickness of 0.4 to 0.8 mm, which is hot-dip galvanized or coated with aluminum. Thanks to the processing of corrugated sheets, the material's resistance to corrosion improves and strength indicators increase.
After coating, the metal layer is lowered into the machine, creating the necessary “wave” and parameters. Owners country houses When purchasing a profiler for a roof, it is recommended to order additional processing:

• creation of a two-sided protective layer by passivation. The sheets are coated with a special compound;
• additional painting on both sides - a primer is used from the inside, and a polymer is applied to the outside.

The quality of the coating ensures the choice of which types of corrugated roofing will be relevant for construction, and allows you to determine the advantages of the material.

Advantages of metal profile sheets

To properly cover the roof own home, appreciate the advantages of metal with profiling. A good profiled sheet has the following characteristics:

1. Environmentally friendly - production was carried out using non-toxic materials;
2. Rich colors, allowing you to use the material that is needed to create a harmonious architectural ensemble;
3. Variable price range, so owners can choose optimal type sheets with profiling;
4. The standard length of the layer is 20 m. It is enough to cover the roofing surface with any slope without forming joints.
5. Lightness self-installation corrugated sheeting for your roof, which can be done by two people.

If owners know how to select quality profiled sheets, they will provide long-term operation home and the comfort of living in it.

Domestic GOST: requirements for profiled sheets

When planning to choose corrugated sheeting for the roof, it would be a good idea to pay attention to technical standards material. Manufacturers adhere to the requirements of GOST 24045-94, because it contains the standards that metal profile material must comply with - the quality of raw materials for production, the geometry of profiles, principles of marking, features of product testing and transportation rules. According to the regulatory document, you can determine which type of corrugated sheeting is suitable for the roof. Depending on the marking that the profile has, the material is divided into:

• "N". The index denotes the increased load-bearing capacity of the metal. A working width of 110 cm is enough to cover the roof efficiently.
• "WITH". The letter is used to mark metal sheet, used for arranging walls. It has a letter value from 21 to 21 and is designed for work in areas with a temperate climate;
• "NS". Universal marking explaining the use of metal profiles for organizing fences, gates, and the sides of gazebos. However, by choosing a sheet marked NS-35 or 44, you can strengthen the roof in regions with extreme temperatures.

When comparing which corrugated sheeting is best for a roof, choose metal with the indices “H” or “NS”. The products have an optimal shape, profile parameters and maximum load-bearing capacity.

Types of corrugated sheets

Manufacturers produce various types corrugated sheeting, varying depending on the thickness, parameters, ridge height, type of protective coating and color.

Wave height - determine the rigidity

For roofing metal profiles, it is important to take into account the height of the ridge - it is responsible for the characteristics of rigidity and throughput. Large indicators increase the cost of the roof, but ensure the longevity of the house.
The wave of profile sheets varies from 10 to 114 mm, so take into account its slope and the area of ​​the slope. The correct corrugated sheeting for the roof is with a wave height of at least 20 mm.

Material thickness - setting strength

Keep in mind that depending on the thickness of the corrugated sheeting, it determines how strong and reliable the roof will be. Metal profile sheets are produced with a density of 0.1 to 1 mm. When planning how to properly use the material, note how thick it is made:

• optimal for roof construction steel sheet from 0.4 to 1 mm;
• the thickness of the corrugated roofing determines not only the cost of production, but also the strength of the structure;
• wind force justifies the use of metal profiles with a density of 0.45 - 0.5 mm;
• a thick coating will create a load on the rafter frame and beams, so the structure will need to be strengthened.

Its main parameters will depend on the thickness of the sheet.

Material dimensions - ease of roofing

Length and width profile material are always at the discretion of the buyer. There are no clear criteria for the parameters, but when choosing, it is important to know the following:

• The dimensions of the corrugated sheet will depend on the total area where the roofing is performed. Before purchasing, draw up a drawing and ask the supplier to cut the rolled metal;
• the length is selected according to the area of ​​use of the corrugated sheet. The dimensions of the sheet intended for covering residential buildings are from 6 m.
• The width of the sheet is established by production standards. Standard parameters steel - 12.5 cm, but they vary in corrugation height. For covering a house, profiled layers with a width of 0.98 - 1.85 m are relevant. Since the sheets are laid with an overlap, the width is 40-80 mm less than stated.

To choose the right corrugated sheet material, calculate its quantity. Experts recommend purchasing 10-15% more metal profiles than required for the job.

Do I need to take the roof slope into account?

It is imperative to take into account the angle of inclination of the surface. Even quality material will not provide airtightness if the roof is not designed correctly. The steepness of the roof slope determines how much corrugated sheet you need for the roof:

• a slope greater than 10 degrees requires an overlap of 30 cm and additional surface treatment with sealants;
• a slope of 10 to 15 degrees promotes an overlap of 20 cm;
• a roof inclined from 15 to 30 degrees requires a reduction in overlap to 17 cm.

On small slopes, profile sheets are laid with an overlap of two ribs.

Coating of profilers – preventing corrosion

The rational choice of corrugated roofing should be based on the quality of its protection against corrosion and rust. Sheets with several types of coating are used on the surface of the house:

• galvanization. It optimally combines price and quality indicators, but the zinc coating reflects the sun's rays and creates an uncomfortable microclimate in the summer. Metal is suitable for organizing a garage or outbuildings;
• aluminum-silicon processing. Increases the stability of the material, applied to profiled sheets used for durable buildings - outdoor gazebos. Treated products become resistant to wet and aggressive environments.
• pural. Material based on polyurethane components. Polyamide additives increase the reliability of sheets and increase their resistance to ultraviolet radiation. The composition applied to a metal profile sheet with a layer of 50 microns is frost-resistant.
• polyester. Budget coating with glossy and matte texture. Despite the lack of glare and color fastness, it is capable of scratching and chipping.
• plastisol. In terms of reliability, it is comparable only to pural, since it is applied in a layer of 200 microns. Thanks to relief embossing and dashed notches, it is used under extreme climatic loads.

During coating, all steel elements are primed with anti-corrosion agents, covered with a chromate layer and decorative composition. Therefore, which corrugated sheeting will be best for the roof can only be said by the owner of the dacha, who has selected the material according to the architecture of the object and the landscape style of the site.

Criteria for selecting profile sheets

When choosing which corrugated sheeting to cover the roof with, pay attention to its markings. Not only the letter or numeric index is important, but also the GOST or TU marks. They mean compliance with government regulations, which are higher than those of manufacturing companies.
There are other requirements that will help buyers how to choose corrugated sheets. Experts recommend focusing on:

1. Appearance of profile sheets. Inspect the products. They should not have any defects - chips, peeling, paint runs.
2. Geometric proportions of roofing material. The manufacturer must match the dimensions of the corrugated sheeting needed for your roof with the products he has available. Measurements of thickness, width and length according to GOST are a sign of a high-quality profile.
3. Wave proportions. The corrugated sheets are arranged with an overlap, so the upper corrugation necessarily covers the lower one. Are you wondering what type of corrugated sheeting to choose for your roof? Purchase the required 20 cm of metal to ensure a high-quality overlap and reduce the risk of moisture getting on the roofing pie.
4. Sheet cutting quality. At the factory metal profile cut with a guillotine. Smooth and precise edges without nicks guarantee the absence of rust.
5. Strength indicators. The round samples shown by the seller will not explain the strength of the material. Ask to demonstrate square samples.
6. Sealing of packaging. If the profiled sheets are properly packaged, they will not be damaged during transportation.

Be sure to ask the supplier to issue a guarantee for the product and provide certificates of conformity. This will not only demonstrate the quality of the material, but also declare the responsibility of the selling company.

Selecting the brand of material

When thinking about which corrugated sheeting to use for the roof, it is important to know its numerical index. According to the wave height and sheet thickness, several types of material are distinguished

Profile marked C21

Available in the form of a trapezoid of standard length (2, 3 and 6 m). To complete the roof, you need to focus on the dimensions of the corrugated sheeting: width 1.05 m, wave height 21 microns and thickness 0.4 - 0.7 mm. Metal material Suitable for creating a roof covering on thin lathing or as garage cladding.

Roofing profiled sheet C44

It is most convenient to work with sheets with a width of 1.47 m. The height of the corrugated sheet laid on the roof is 44 microns, and the thickness varies from 0.5 to 0.8 mm. The profile is reinforced with additional stiffening ribs and provides for the construction of a roof on sheathing in increments of 2 m, as well as frames for gazebos or cabins.

Corrugated sheeting with index NS45

Construction home roof can be carried out from corrugated sheets with a width of 1.06 mm. The recommended thickness is 0.5-0.8 mm, and the profile height is 35 mm. The rigidity and strength of the material guarantee reliability roofing on the lathing in increments of 4.5 m.
Having decided on the material, do not forget that its price depends on the alphanumeric index.

What do you need to know about the price of profiled sheets?

Thinking about what kind of corrugated sheet would be better suited for the roof, do not forget about its cost. When a metal profile sheet costs less than average, then savings have been made on its production. Try to select products with average prices.
Focusing only on price is the wrong approach to purchasing, because the prices include the type of metal, its thickness, coating, production technology, transportation costs and promotion of the supplier brand.
Are you planning to install the roof yourself? Consider all recommendations for choosing and purchasing corrugated sheets. Be sure to study the slope of the roof, the climate of the region where you live - and you are guaranteed to know which corrugated sheeting will be ideal for your roof.

The range of profiled sheets is very extensive, so it is not always clear which corrugated sheet is best in your case. It is difficult to make a choice, since the profiled sheet differs not only in purpose, but can also have different technical characteristics, coating, quality, color and, of course, price.

Two of dozens of possible types of corrugated sheeting: with pural coating and wood textured

This article is devoted to exactly what kind of profiled sheet there is and how to choose it correctly for a particular task.

What types of corrugated sheets are used and what should you pay attention to when choosing?

Profiled sheets are used in construction for a huge number of works: from permanent formwork to wall cladding and roofing. Therefore, first of all, it is divided according to its area of ​​application into the following types:

• wall (marked with the letter C);
• carrier (marked with the letter N);
• universal (marked with the letters NS).

The listed groups are what types of corrugated sheets there are, not only according to their purpose, but also, in fact, according to their characteristics, since they strongly depend on where exactly the material is intended to be used. Thus, a load-bearing profiled sheet can withstand much greater loads than a wall sheet, due to the greater wave height, thickness of the metal, and the presence of additional stiffeners.

It is worth noting

There is no special roofing sheeting or fence. These are all marketing names that usually designate one of the listed types with some special feature. For example, with a capillary groove to trap and remove moisture.

The division of profiled sheets according to purpose is quite arbitrary. Which metal profile is better in each specific case depends on where it is planned to be used. In particular, the wall profile can be used for roofing, and the load-bearing profile can be used for the construction of high fences in areas with high wind loads. Therefore, when choosing a profiled sheet, you need to look at its technical characteristics, and not the type.

Let's take as an example middle lane Russia, a territory without strong winds and heavy snowfalls. Under these conditions, with a roof slope greater than 30°C, roofing coating will do corrugated sheet S-21, although initially this material was not designed for such use.

How to choose corrugated sheeting according to metal thickness?

The profiled sheet is made of metal, with a thickness of 0.4 to 1.2 mm. The thicker the metal of the original workpiece, the higher the load-bearing capacity of the corrugated sheet. The service life of the profiled sheet also depends on the thickness of the metal.

But at the same time, with an increase in the thickness of the metal, the weight of the corrugated sheet also increases, which eliminates one of its main advantages - ease of installation and low load on the rafter system. The cost of corrugated sheets also increases, and very significantly.

Therefore, the decision on which corrugated sheet thickness to choose is usually made in favor of replacing low-profile material made of thick steel with a profiled sheet with a higher wave height. This is beneficial both in terms of price and based on the load on the rafter system.

Types of protective coating of corrugated sheets

The protective coating of a profiled sheet significantly affects its service life. Since durability is one of the most important criteria for any building material, you need to know what types of coatings a corrugated sheet can have, how to choose the right one for your task, and in what cases you can save money.

The most inexpensive, but at the same time, the most short-lived coating is zinc. Corrugated sheeting with a protective layer of this material is used for the construction of temporary fences, formwork, and also for some outbuildings. Private developers practically do not use such profiled sheets, since their service life is only 15-25 years, and they quickly lose their appearance.

Example of a profiled sheet with an embossed coating of 200 microns and a service life of 40-50 years

More reliable coverage made of aluzinc, its composition includes, in addition to zinc, 55% aluminum and 1.6% silicon. Profiled sheets with such a coating last much longer than with simple zinc, and are most often used for the manufacture of prefabricated garages. Much less often it is used for the construction of hangars and warehouses. Again, such material is practically not used by private developers.

The most expensive, but also the most durable is a polymer coating. It is this material that is mainly used in modern construction, since its service life is 25-50 years, and it can be almost any color.

Various polymers can be used as a protective layer. If you are interested in the question of how to choose the right corrugated sheeting with a polymer coating, then you should focus on the price and operating conditions of the material. The fact is that the listed polymers differ in chemical composition and, as a result, resistance to various external influences.

In Russia, profiled sheets with protective coating from the following materials:

1. Polyester. Profiled sheets with such a coating are the cheapest. He's not afraid high temperatures, has a service life of 25 years, but is not resistant to mechanical stress. Therefore, during transportation and installation, extreme care must be taken, since the polyester layer is very thin and easily scratched.
2. Pural. This material is extremely wear-resistant and its service life reaches 40 years. In addition, it is resistant to ultraviolet radiation, resistant to chemical and mechanical influences, as well as temperature changes. Since it is quite expensive, pural is usually used in aggressive environments: on the sea coast, in industrial areas, in areas with high solar activity or humidity.
3. Plastisol. A very wear-resistant coating, which is applied in a thick layer and perfectly withstands aggressive environments. It fades in the sun and also does not tolerate heating to high temperatures. Therefore, it is not recommended for use in hot regions. The color scheme is usually light, texturing is possible. It is used in the regions of the north and central zone in areas with aggressive climatic or man-made conditions.
4. PVDF. Corrugated sheeting with such a coating practically does not fade, is resistant to chemical and mechanical influences, and has a long service life. However, it is very expensive, so it is rarely used.

Thus, to summarize, during construction in conditions where there are no high temperatures and aggressive environments, ordinary polyester is quite suitable. But if you are building, for example, on the seashore, then you should pay more attention to the question of which corrugated sheeting to choose so that it lasts as long as possible.

Criteria for choosing high-quality corrugated sheets

The above shows how to choose a metal profile based on fundamental aspects: brand, thickness, coating. However, there is also the question of the banal quality of the material.

To protect yourself from counterfeits, substandard products and simply unscrupulous manufacturers, you need to follow just a few simple rules.

First of all, Please inspect the material carefully before purchasing. It must meet the following criteria:

1. The surface of a high-quality profiled sheet must be smooth and free from dents and any other external defects.
2. The edges of the sheet should be smooth, without burrs.
3. The coloring should be uniform, without sagging or chipping.
4. When bending the sheet, the polymer layer should not break or crack, and the corrugated sheet should easily take its previous shape when unbent.

If you are buying a large batch, the sheets can be inspected selectively, but very carefully and at least a few random ones from one package.

Necessarily pay attention to whether there is a guarantee for corrugated sheets from the manufacturer, and for how long it is given. If the manufacturer claims that the service life of a profiled sheet is 25 years or more, but gives a warranty for a year or does not give it at all, this is a serious reason to refuse the purchase.

Always check certificates of conformity, which necessarily come with each batch of corrugated sheeting. Of course, their presence does not guarantee that the material in front of you is of excellent quality, since everything is bought and sold in Russia. But this way you can protect yourself from completely low-quality materials who do not have these certificates.

And the last thing - consider the seller's reputation. If you buy material on the market in a small store, then the likelihood of buying a low-quality item is disproportionately higher than if you purchase profiled sheets in a large construction hypermarket. Although in the latter such probability is also far from zero. It is most reliable to work with those sellers who were recommended to you by your relatives or friends after successful personal experience.

Corrugated sheeting is one of the most inexpensive and beautiful roofing coverings. Reliable, durable and has the classic design, which will never go out of style. 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 corrugated sheeting is made from it: by cold rolling and subsequent decorative and protective polymer coating.

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

Second important point– corrugated sheeting consists of steel and does not produce any strong unpleasant odors like some of today's roofing coverings. Easy to cut, easy to install. In addition, it can be laid on any roof, the angle of inclination of which is not less than 8°, and the slope does not exceed 20 meters.

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

Have you decided on just such a roof? Then all that remains is to purchase high-quality, durable sheets with the necessary characteristics!

Types of modern corrugated sheets

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

Marking

The height of the corrugation for roofing corrugated sheets is permissible in the range of 10-114 mm. Just based on the height of the corrugation and the thickness of the sheet, on a modern construction market You can find three types of corrugated sheets:

• Facade class C, which is used for the construction of fences and wall decoration.
• Load-bearing class H, which is used for cladding walls and partitions.
• Roofing, which is used to finish roofs. This is the NS class.

More details in the picture:

On modern market the most common sheets of markings are H45, H75 and H114. On sale you will find sheets C10, C20, C35. CH class corrugated sheeting is called load-bearing or 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 figure it out:

If you do not find the GOST inscription at the end of the marking, it means that this batch was manufactured according to a different standard. In addition to all this, markings A and B indicate the presence of painted sides, and R indicates the presence of a capillary groove.

Manufacturing technology

There are different types of corrugated sheeting according to manufacturing technology:

1. Rolled products with aluminum-silicon coating.
2. Rolled thin sheets with aluminum-zinc coating.
3. Thin-sheet aluminized rolled products.
4. Thin sheet metal 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 interesting video about the production itself:

Please note that some models of corrugated sheets and more expensive metal tiles can be produced on the same machine, but will still differ in their qualities. It’s just that some models of corrugated sheets are universal. This, for example, can be called corrugated sheeting S-20: PS-20 is wall sheeting, and PK-20 is roofing sheeting. Just the same roll to make wall option and roofing is placed on different sides. And there is only one rental. In other words, this is the same profile, but with a reverse side.

Coating quality

Corrugated sheeting 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 on corrugated sheets can also vary. The following are considered suitable for roofing:

• Polyester. Excellent decorative qualities, but poor protection against mechanical damage. Abrasion and peeling are its main problem.
• Pural. It’s just as bad in terms of wear resistance as polyester, but it’s much cheaper.
• PVDT, or polyvinyl difluorine. Excellent qualities of strength and light fastness, rich decorative range. The cost is higher.

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

Price formation

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

• Availability of zinc coating.
• Availability of color.
• Presence of protective painting.
• Length and width of the sheet.
• Sheet thickness.
• Corrugation height.
• Purpose of corrugated sheets.

What a wide choice you have!

What kind of corrugated sheeting can be used to cover the roof?

And now about what types of corrugated sheeting specifically for roofing there are today, and why one of them is better than the other.

There is a GOST regarding the following coatings: “Profiles of construction bent steel sheets with trapezoidal corrugations.” It states that the thickness of the sheets should be between 0.4 and 0.6 cm.

In practice, most often a profile sheet with a thickness of 18 to 35 mm is used to finish the roof. Traditionally, this is the NS brand, which has the most optimal rigidity, 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.
• Corrugated metal sheeting, also uncoated.
• Expensive and durable corrugated sheeting made of non-ferrous metals: copper or aluminum. The rarest option.

And even a kind of exotic. So, special corrugated sheeting for the roof can be:

1. Made by cold rolling.
2. Bent to the 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.

Format of issued sheets

So, the design and shape of the corrugated sheet have been chosen, all that remains is to build the sheathing and decide on the dimensions of future sheets:

And at this stage, let's understand a little terminology. So, “waves” go across the slope, and “rows” along, and the distance between the rows is called the corrugated pitch. But “modules” are called sheets that consist strictly of six waves and have a pitch 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 with such “modules” it will not be possible to lay it out to scratch, without leftovers and the need for cutting. That's why it's fashionable to order roofing sheets today custom 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 everyday life of roofers there is also such a term as “bottom cut”. This is 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 specially ordered ones.

By the way, if the slope on your roof exceeds 6 meters in length, then to prevent the corrugated sheet from bending, it is better to order material that is half as long. For example, 3 meters, taking into account the overlap that the corrugated sheet has - 100-150 mm. Every second wave will need to be fastened under a transverse pattern

What to do with the sheets after purchase?

The first step is to transport it correctly:

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

If it turns out that some sheets still need to be trimmed, don’t worry! You can easily handle this on your own. For this purpose, use ordinary metal scissors (or a hacksaw as an option) to cut along the length, and to form bevels, use a power saw with special teeth made of hard alloys. But grinding machines with wheels made of abrasive materials will lead to corrosion of metal sheets.

How to avoid running into fake corrugated sheets?

So we figured out which corrugated sheeting to choose for the roof of your house. Agree that installing a roof is extremely important stage construction of the entire house. Walls and even foundations are much easier to repair than roofs - all because of the height. Therefore, when purchasing a metal profile, be sure to find out what raw materials these sheets were made from. You don’t really want to see this on your own roof in a year, do you?

The most dangerous period in terms of counterfeits in the construction market is summer. It is at this time that everything is built - weather and air temperature permit. It is quite difficult for large manufacturers to plan sales volumes and there is often a situation when corrugated sheets are at their peak. construction work no longer in stock. That’s when small companies engaged in handicraft production come into play. They buy wherever they find the cheapest raw materials - Chinese, Indian or domestic, for a long time stored in improper conditions and almost decomposed. Sheets are produced on home-made simple machines, which are then sold on the market as “quality material”, with a slight difference in price. Most often, the buyer is offered a 10-20% discount on the cost of “the same corrugated sheet as a large manufacturer, why overpay for the brand?”

Therefore, the first warning sign is the price. And it is formed depending on the purchase price of raw materials - one ton of galvanized steel roll. Expensive corrugated sheeting is made from expensive raw materials, and cheap corrugated sheets are made from cheap ones. And then the price depends on how thick the sheets themselves will be. That’s why, if a manufacturer offers you relatively inexpensive corrugated sheeting of normal thickness and supposedly high technical characteristics- only cheap raw materials, Chinese or Indian, but not European, could be used. 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 buyer may not even know that the raw materials themselves cost the scammers literally pennies - for him, sometimes the price set is not a penny at all...

Second call: promises

The second alarm bell is promises to fulfill the order too quickly, i.e. make sheets of the required size. Yes, between any large manufacturer and buyer there are always intermediaries - at least two. And it is from them that you order the goods. But any normal company will not deliver it to you before 10 days, but on the market they will promise it much faster, after which they will miss the deadline and explain their behavior as a breakdown of some line.

Third call: fast delivery

Even more often, the buyer is forced to purchase ready-made sheets, only at a price much higher than the standard ones. In fact, a seller of quality material who cooperates with a real manufacturer will immediately say that time is needed and will not impose something that is already lying around.

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

But we hope that our tips 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!

Increasingly, when choosing roofing materials, preference is given to inexpensive, but very high-quality coatings, including corrugated sheeting. This is a fairly strong and very durable product, which is a profiled sheet of metal that has undergone a cold rolling procedure.

A corrugated roof is suitable for any roofing structure.

This coating ends up being quite attractive; the polymer layer of paint allows you to choose it in full accordance with your needs. general style Houses. with such material it will not be difficult.

However, it is important to decide which corrugated sheeting is better, since today a large number of its varieties are produced. Some can be used not only for roofing works, but also for the construction of fences, others - for the design of ceilings, walls, canopies, and for the installation of floors.

In our article we will look at what types of corrugated sheeting are suitable for roofing and how to make the right choice.

General characteristics of corrugated sheets

Before you move on to choosing corrugated sheets, you need to decide on its general characteristics. Let's find out what exactly makes it so durable, reliable, and attractive in the eyes of not only builders, but also ordinary consumers.

Manufacturers offer us a wide variety of profiled sheets, each type has its own properties and performance characteristics. Among the types of corrugated sheets that can be used as roofing material, we can highlight the following:

1. A regular galvanized profile that does not have a polymer coating. It is characterized by its low cost, approximately forty percent lower than corrugated sheeting with a paint layer. Most often it is needed when constructing canopies for outbuildings, garages, and fences.
2. Steel corrugated sheet made of ferrous metal, has no coating.
3. Corrugated sheeting made of non-ferrous metals: aluminum or copper.
4. Special. It can be: rolled, bent, perforated, with textured embossing.

Each of these has its own characteristics. This is the height, useful and full width of the sheet, thickness (be sure to take into account the moment of inertia).

In order to cover the roof of a house with durable material, we pay attention to the thickness, type of outer covering and the appearance of the profile itself. This can be a load-bearing profile, facade and ceiling, wall, special, formwork.

The production of corrugated sheets involves the process of cold profiling of durable steel.

Corrugated wall, facade, load-bearing sheeting, which has the necessary characteristics, is excellent as a roofing material.

The sheets of supporting corrugated sheets themselves have a special capillary groove, which, when laid overlapping, perfectly drains rainwater, but the facade profile does not have such a groove.

When choosing corrugated sheeting, which can be used to cover the roof of a house without any problems, you must definitely pay attention to this feature. Such a capillary groove should not bend. As a rule, it starts from the ridge and ends at the eaves drain. In cheap options, such a groove is flattened, which makes its presence simply useless; buying such a profile, even despite the attractive, tempting price, is not worth it.

It should immediately be noted next moment: only corrugated sheeting that has this specification can be used as a roofing material; it can also be used for finishing the facade.

But it is not recommended to use a purely façade profile for roofing work!

Types of corrugated roofing

Types of corrugated sheets differ in the width between the ridges and the thickness of the metal.

Among the main options for corrugated sheeting that can be used to cover a roof are:

1. RN-20 is a corrugated sheet that can be used for roofing work, in the construction of fences, exterior and internal lining. It has a special groove that ensures water drainage; during installation it requires sheathing in increments of up to eighty centimeters. The working width of such a sheet is one hundred and ten centimeters.
2. S-21 is a profile with sufficient rigidity for installation on the roof. When laying, it provides protection from precipitation; the sheathing pitch should be up to eighty centimeters.
3. NS-35, 44 are used for roofing and enclosing structures. They are distinguished by great rigidity and strength. S-44 has additional stiffening ribs, which makes it higher quality among roofing materials.

For roofing work, you can also use types such as N-57, 750 (900), N-60, 75.

Choosing corrugated sheeting to cover the roof of a house is a very important and responsible matter. It must be taken quite seriously.

The main selection criteria are:

• marking (indicated by a capital letter and numbers, shows the purpose of the flooring, data on the thickness, height of the wave, its type),
• appearance (a high-quality sheet must be smooth, have no dents or defects; the paint coating is even, of the same shade, there are no traces of sagging or chips),
• price ( good material It won’t be very cheap, although the corrugated sheet itself has an affordable and attractive price),
• type of polymer coating (the paint layer can be very different, some of its performance characteristics depend on this).

Let's look at these criteria in more detail.

1. Marking. As a material that can be used to cover the roof of a house, it is worth using a profile marked C and H (this is also load-bearing). The latter is preferable, as it has the necessary rigidity for the roofing. The order of the numbers in the marking shows the wave height of the sheet and its useful width. As a roofing material, you need to take a profile whose wave height is at least twenty millimeters. Also look at TU ( technical specifications) or GOST ( state standard, is considered to be of higher quality), according to which the corrugated sheeting was made. The product must have a certificate.
2. Appearance of corrugated sheets. In order not to overpay later for dismantling and replacing the roofing, you should initially choose high-quality material. You can tell a lot about the quality itself by appearance. A bad profile not only quickly cracks, but noticeable flaws and defects appear on it. If there is peeling of the paint, dents, chips, burrs on the cuts - all this indicates that there is no need to buy such a profile. Try it lightly - high-quality material will immediately take its shape without breaking. A little effort will not leave any marks on its surface at all.
3. Price. The price of corrugated sheeting depends on the thickness of the sheet, the presence of a polymer or plastisol coating, and the purpose of the material. Before purchasing, study the price lists of several stores, since the same material from the same manufacturer may cost differently. It is best (if possible) to order sheets directly from the manufacturer, who will not only cut the profile to the required length, but also ensure that it is painted in the desired shade. The cost of such a covering will be much lower, and specialists will help you correctly calculate the amount of roofing material and tell you what additional accessories, slats, roofing profiles can be ordered.
4. External covering of corrugated roofing. Any corrugated sheeting used to cover the roof of a house has a galvanized coating applied using the hot method. Zinc performs protective functions, protecting the sheet from corrosion. The thickness of this layer depends on the expected aggressive loads on the material, but it should not be too thin. In addition, a layer of polymer is applied to the galvanization after passivation and priming. One of the most quality coatings Polyester (matte), regular polyester, and plastisol are considered.

As you can see, choosing high-quality roofing material to cover your roof is not so difficult. A few simple ones, but important factors above will help you with this.

Conducted among the portal participants, the top three among roofing coverings in demand in private housing construction is closed by corrugated sheeting. It is inferior to metal and flexible tiles, but surpasses other roofing materials in popularity. And if for some the laconic profile is a minus, then others choose this coating precisely because of the visual component. In any case, corrugated sheeting on roofs is a fairly common occurrence; it would be a good idea to consider this material in more detail.

• What is corrugated sheeting?
• Varieties of profiled sheets.
• How to choose corrugated roofing.

What is corrugated sheeting?

Profiled sheet, also known as corrugated sheet or corrugated sheet (less often metal profile), sheet material, made of galvanized steel by cold rolling (profiling). Modern corrugated sheets are available with profiles different types, but trapezoidal has become more widespread. And although the profile significantly increases decorative properties material, first of all, it gives it the necessary characteristics - increases strength, rigidity, load-bearing and throughput.

To extend the service life of the metal, after profiling, polymer coatings are applied to the surface - they not only protect the sheet from external influences, but also significantly increase the decorative effect. Today, corrugated sheets can be bought in almost any color, both with a matte and glossy surface. As for polymers, the same ones used as in the production of metal tiles are used - polyester and polyurethane derivatives.

The service life of the profiled sheet primarily depends on the parameters of the steel base and the zinc layer, but the protective and decorative coating also makes its contribution. Without a polymer film, zinc immediately reacts with environment. This does not mean that it will be “washed away” in a few years, but such a roof will last less. However, no layer of polymer guarantees a profiled sheet for many years if the base is too thin steel and insufficient layer of zinc. As with metal tiles, the production cycle usually includes profiling and coating, and the steel is purchased from domestic or foreign companies. Accordingly, the quality of the final product will depend on the quality of the raw materials.

Types of profiled sheets

By and large, today corrugated sheets differ from metal tiles only in the shape of the profile, since they are made from the same galvanized steel with polymer coatings. And if the disadvantages of corrugated sheets often include insufficient decorativeness, then one of its main advantages is considered to be “tolerance” to the sheathing. Unlike MCH, the step between elements can be much larger, and it does not have to be strictly observed. This not only allows you to save on lumber, but also simplifies preparatory process. As for the maximum permissible slope angle, metal tiles and corrugated sheets are similar in this indicator.

Pil18

It is preferable to use profiled sheets on the roofs of buildings with an inclination angle of 20 degrees. Allowed for industrial facilities with a self-supporting profile minimum slope for corrugated roofing, at least 8 degrees, and for residential buildings - from 10 degrees.

Initially, corrugated sheeting was not intended for use as a roofing material and was produced in three types:

• C – wall, for cladding facades, gables and fences;

• N – load-bearing, with increased load-bearing capacity, for pouring lightweight monolithic floors;

• NS – universal.

However, both wall and load-bearing and universal corrugated sheeting were used to cover roof wings back in the USSR - but if then these were mainly hangars, warehouses and other industrial facilities, today these are not only various sheds and outbuildings, but also private houses. The possibility of using S, N or NS profiled sheets on the roof depends on the height and shape of the ridge - with equal base thickness, it is these indicators that provide the sheets with sufficient load-bearing and throughput capacity. In order for a wall profile to be used as a roofing profile, the height of the ridge must be from 21 mm; a universal one is also in demand, since it has this figure of 35 mm.

As for the load-bearing corrugated sheet, it is also used for roofs, but this is impractical, even in order to save wood.

The owner of the sofa

In general, all profiles above 45 (C 45) are meaningless for use on the roof purely economically. It is all the more pointless to use profiles of group H, since there is an attempt to use their high load-bearing capacity in order to save on sheathing rafter system results either in its (rafter system) becoming heavier or in subsequent collapse.

Demand gives rise to supply, and today manufacturers offer profiled sheets specific for roofing applications, which not only special shape profile, but also a groove for condensate drainage, due to which the height of the ridge can be lower than 21 mm. Such sheets are marked with the letters R, but some brands also add an abbreviation (MP, SIS). However, the downside of a low profile is the dependence on the base - due to the low rigidity, such sheets require frequent and sometimes continuous lathing.

What to look for when choosing corrugated roofing

The advice to “look at the root” is also relevant in this situation, only the core is the root, namely the galvanized steel base of the corrugated sheet. The thickness of the metal, excluding the polymer layer, must be at least 0.5 mm, and the zinc coating must be at least class two (140 g/m²), but the higher this figure, the better. If the rigidity of the corrugated sheet depends on the height of the profile, then its resistance to corrosion depends on the thickness of the zinc coating. Typically, resistance to fading is also important to consumers.

Oleg_Sova

The time has come to purchase metal profiles and all additional materials. Definitely profile C 21, but I can’t decide between the coatings:

• polyester gloss;
• matte polyester.

I'm most interested in anti-corrosion resistance and less fading.

Pil18

Anti-corrosion resistance will be higher for metal with high content zinc – 275 g/m². In terms of color fastness, matte coatings are better when it comes to polyester. But polyurethane coatings are better than polyester (polyester) coatings.