Brands of corrugated roofing are galvanized. Which corrugated sheet is better for the roof - types and rules for installing corrugated sheeting. What is corrugated sheeting?

Profiled metal sheets are in demand in the construction industry and are actively used to create roofing. The material is presented in different options, which requires the right choice taking into account climatic conditions, roof type and other factors.

The right choice of corrugated sheeting for the roof of a house

Corrugated sheets are embossed metal sheets with a colored polymer coating that protects the metal from corrosion and extends its service life. Despite the apparent simplicity of the structure, corrugated sheeting is available in different versions, and all brands differ from each other in characteristics, purpose and other properties. Therefore, when choosing, they are guided by several criteria and features of grades of profiled sheets.

Corrugated sheet provides good protection roofs

Types of corrugated sheets and their features

The installation of a roof requires the use of high-quality materials, since the roof is always exposed to climatic factors and must be durable. Three main types of material meet these requirements:

• galvanized sheets without color polymer coating, which are inexpensive and are often used for arranging the roofs of utility rooms;

  Galvanized sheets are convenient for arranging the roofs of utility buildings

• wall (C) or load-bearing (H) material with a polymer protective coating is suitable for roofs of residential buildings;

  Polymer coating protects metal from corrosion

• roofing sheets can be bent, rolled or with textured embossing and differ in appearance and profile shape.

  Roofing sheets can be of any color

All options are made from coiled steel, and the relief surface is created by cold profiling. In this case, the technical characteristics of the sheets depend on the thickness of the steel, configuration and depth of the profile. High-quality corrugated sheeting for the roof of a house must meet the following indicators:

• profile height from 20 mm;
• the presence of a capillary groove for improved moisture removal (the supporting corrugated sheet has a groove, and on facade material there is no capillary outlet);
• the polymer coating should not have scratches, different thickness and other defects;
• there should be no dents or deformed areas on the sheets of material;
• It is best if the length of the sheet matches the length of the slope, which avoids unnecessary overlaps.

Description and characteristics of corrugated roofing grades

The main types of corrugated sheeting for creating roofing differ in the distance between the ridges and the thickness of the metal. The lower the first and higher the second indicator, the stronger and more durable the metal sheets. This also affects the load-bearing capacity of the material, since snow, rain and wind have a significant impact on the roof.

Corrugated sheeting protects the roof well from climatic factors

Popular brands metal sheets for the roof of a house have the following characteristics:

• material grade S-21 is characterized by high rigidity, and its installation is carried out on the lathing in increments of 90 cm. It can be polymer-coated or unpainted. Usable width standard sheets is 1000 mm, and the length can be in the range from 1 to 12 m. The profile of this brand is made in the shape of a trapezoid and has a height of 21 mm, the steel thickness is from 0.4 to 0.8 mm. The weight of 1 m2 can be from 4.45 to 8.4 kg, according to the minimum and maximum thickness;

  Profiled sheeting S-21 is universal and is used for both roofing and facades

• RN-20 has analogues labeled C17 and MP20, which have almost identical characteristics. Sheets can be galvanized or with a polymer colored coating. During installation, a sheathing pitch of up to 0.8 m is observed. The height of the trapezoidal corrugation is 20 mm, and the sheets are produced up to 12 m long and 1100 mm wide;

  The parameters of MP20 grade corrugated sheets allow the use of this material for roofing

• grade S-44 has additional stiffening ribs, is made of steel with a thickness of 0.5–0.9 mm, the corrugation height is 44 mm, the usable width is 1000 mm, and the sheet length can be from 0.5 to 12 m. Corrugated sheeting refers to wall type, can be galvanized or painted with a polymer composition to protect against corrosion;

  44 mm sheet profile ensures rigidity of the coating

• material NS-35 refers to universal type corrugated sheeting, has a corrugation height of 35 mm, a useful width of 1000 mm. The thickness of the steel ranges from 0.4 to 0.8 mm. Sheets can be zinc or polymer coated. The material has a trapezoidal profile, which is optimal for roofs with any slope.

  Capillary channel improves moisture removal from the roof

Marking features

All types of profiled sheets have a certain marking, which allows consumers to easily navigate when choosing among a variety of sheet options. The markings indicate all the main parameters and characteristics of the material, making it very easy to understand for what purposes the sheet is intended. This is determined by the letters that the marking contains. There are several main classification options:

• “N” is a load-bearing type of corrugated sheeting, which is the most durable option of all. Material with this marking has an additional groove along the profile, increasing the rigidity of the sheets. Elements marked “H” have the highest profile height and significant steel thickness.
• "C" stands for wall type material used for cladding facades and creating lightweight buildings. The wave height can be from 10 to 44 mm, which is significantly lower than for roofing material. “C” sheets are made of steel up to 0.7 mm thick, so they are not suitable for roofs subject to significant loads.
• “NS” is a material that has average parameters between the two above options. Universal sheets are suitable for roofing, fences, and light structures. The polymer coating enhances the strength and rigidity of the structure.
• "MP" is also universal option, used for roofs, sandwich panels, partitions, etc. Sheets are available in galvanized versions and with a polymer coating. For roofs with any type of slope, products marked “MP-R” are most suitable.

Video: features of choosing corrugated sheets

Coverage options

In addition to the thickness of the steel, the height of the corrugation and other parameters, the type must be taken into account when choosing outer covering. There are two main options: galvanized and painted sheets.

Zinc

In the first case, a protective zinc layer is applied to the steel sheet, providing basic protection for the metal. This option is less durable than painted, but more affordable. It is suitable for temporary structures, domestic buildings, constructed in any climatic conditions.

Galvanized sheets have a silvery surface and do not heat up in the sun

Polymer

Polymer coating - best remedy protecting metal from corrosion. This layer is presented in several versions, characterized by durability, resistance to climatic factors, strength, and appearance. The main types of polymer coating are presented in the following options:

• polyester (PE) can be glossy or matte, and the layer thickness is 20 microns and 35 microns according to the type. The material can be used at temperatures ranging from -30° to +85 °C and has a service life of about 10 years;
• Pural is applied to steel sheets layer 50 microns thick. Abrasion resistant, service life about 15 years. This protective layer characterizes resistance to precipitation. It is optimal for warm regions without sudden temperature changes;
• plastisol (PVC) is applied in a layer of 200 microns, which gives the corrugated sheet high strength and UV resistance. Service life is about 25 years. Sheets with such a coating are more expensive than those with polyester or pural protection. The coating is suitable for regions with temperate climates and marshy areas;
• polydifluorionad (PVF2) is intended for use in the harsh climate of the North or Siberia, with sudden temperature changes and significant snow load on the roof. The coating has the highest possible strength and provides the material with a service life of more than 30 years.

Roofing materials are presented in wide range, there is even a kind of top coating that is most often used for the roof. One of these leaders is corrugated roofing sheeting, used in the construction of buildings for various purposes and number of floors.

The material is specially processed steel sheets that have been profiled. Exists individual species canvases, the purpose of which varies from erecting a fence to forming formwork. For roof coverings, sheets with a specific abbreviation are produced, characteristic properties and this variety is combined into a classification roofing sheeting.

Advantages of choosing corrugated sheeting for roofing

If we compare corrugated sheeting with other roofing materials, the following advantages will be obvious:

1. Affordable price. This is important during construction, when budget options are limited;
2. Ease. The additional weight of the roof increases the load on the entire building structure, which negatively affects the further performance of the walls and foundation. Light weight convenient for transportation, during installation for lifting to the roof;
3. Defensive ability. At correct installation profiled sheets eliminate the possibility of precipitation and drafts;
4. Fire safety. The lack of combustion ability will be useful for private houses located in cottage or holiday villages;
5. Easy to install. Finishing the roof can be done independently if you have experience in such work or with the involvement of specialists. Present on the market various sizes. Installation can be carried out at any time of the year;
6. Design. Different colors and different sizes allow you to cover the roof of any shape and purpose;
7. Easy repair. If for some reason the roof requires repair, then the damaged area can be eliminated by replacing the sheet or its fragment;
8. Long service life. Average duration use of corrugated sheets for several decades, but provided high-quality installation, the correct type of material.

In order for the corrugated sheeting used to really meet the above requirements, the purpose and grade of the sheet should be chosen correctly.

Brands of corrugated sheets and their characteristics

Since the material has wide scope application, then to make the right choice you should pay attention to the product labeling. It is useful to know the following notations:

• “N” - load-bearing profiled sheets. The best way suitable for roofing, as it has high strength values, corrosion resistance, average thickness 1-1.2 mm;
• "C" - wall. Recommended applications include wall cladding, fencing, and are suitable for some types of formwork. Not recommended for use in roofing works ah, because it does not have high strength and wear-resistant characteristics. Despite this, in some construction work ah, corrugated sheeting marked “C” is still used, but this requires a lathing with a small pitch, reliable dense base, and the material itself is selected maximum thickness 0.8 mm;
• "SN" - load-bearing wall. It is considered a universal brand, as it combines technical and performance characteristics several brands of corrugated sheets at once. The thickness of the material varies from 0.8-1mm.

After the abbreviation there are numbers indicating wave height, sheet thickness, blade width and maximum length respectively. If the product has an additional coating, for example, anti-corrosion, then this may be marked with another letter designation.

Important! Roofing and other corrugated sheets are produced in accordance with technical specifications and GOST. Last option is considered preferable, since in this case the products correspond to the declared load-bearing capacities and technical characteristics. It is according to GOST 24045 94 that corrugated sheets are classified according to the markings “N”, “C”, “SN”.

If there is a different marking on the material, you can request a decoding from the seller. Most likely the sheets are made according to certain technical conditions. There are differences in the designation of corrugated sheets made according to European standards, which is reflected in the corresponding marking.

Which corrugated sheeting is better for the roof?

To select reliable roofing corrugated sheets, you should pay attention to the labeling, GOST recommendations, technical characteristics, and not just the cost and advice from friends. Pick up optimal view profiled sheet can be done with the help of a consultant or by adhering to the following rules:

• For roofing work best material marked “H” and “CH”. Choosing a product category under the symbol “C” may be cheaper, but does not guarantee high levels of practicality in the conditions of use of the coating;
• Coatings are not only decorative, but also protective function. You need to pay attention to this indicator, since the resistance of the coating to a humid environment, temperature changes, and mechanical stress will depend on it. The more functional the coating, for example, a polymer composition, the more this affects the cost, practicality and durability of the roof;
• Load bearing capacity. The indicator shows the possible load of material per m2. This is important to consider especially in climatic zones, where winters are snowy and quite long;
• The optimal thickness of the profiled sheet should be at least 0.8 mm; in other cases, an additional base is formed;
• When choosing the shape and dimensions of corrugated sheeting, you should be guided by the least formation of seams.

In order to save money, some simplify the requirements for corrugated sheets and choose cheaper options, sometimes wall products. Such actions may lead to further additional costs, since the roof will quickly wear out, defects will begin to appear and repairs or repairs will be required. complete replacement coverings.

Bearing capacity and ultimate load

Options bearing capacity and the maximum load must be taken into account, since the future reliability of the roof, its ability to retain accumulated precipitation, and mechanical stress depend on them.

The load that will be exerted on the profiled sheet is calculated using a special formula. Taken into account specific gravity products, the force of the wind, which is preliminarily determined depending on the slope of the roof, the approximate weight of the snow. The calculations are not complicated, but if you have any difficulties, you can refer to experienced specialists who will carry out calculations and measurements in the shortest possible time.

The obtained load-bearing capacity value must be compared with tabulated data on the maximum load on existing grades of corrugated sheets. Corrugated sheeting is selected, the indicators of which are slightly higher than the obtained results. The parameters of existing grades of corrugated sheeting are publicly available in the form of a table, which indicates the types of profile and load, in relation to support schemes based on the principle of one-span, two-span, three-span and four-span.

The rules for selecting corrugated sheeting for roofing should not be neglected, since the future practicality and safety of the structure will depend on this. If difficulties still arise, you should involve a specialist, and not rely only on attractive design and the price of the material.

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, work for 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 acceptable within 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 sheeting 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 laid 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 weak 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 strength and light resistance, 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 such 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 roof decking outbuildings and a garage.
• 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 thing is done important requirement: 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 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 to find a situation where roofing material delivered to the 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. And here 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?

First call: price

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 it is not uncommon that corrugated sheeting is no longer in warehouses at the height of construction work. 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 the 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, after all, the price sometimes 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. Actually a seller 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!

Understanding why corrugated sheeting is better than others building materials this is only the first stage of learning of this material. Having decided, you need to make a choice within the material itself, which corrugated sheeting is best for the roof of the house.

The requirements for roofing corrugated sheeting are more stringent than for wall sheeting, which means you need to know what properties it has, what to look for when purchasing or ordering, taking into account the characteristics and dimensions of the corrugated sheet.

Material prepared for the website www.site

Which corrugated sheeting to choose for the roof of a house?

1. Scope of application and purpose of roofing corrugated sheeting

The choice of corrugated roofing begins with determining the location of its installation. It is this that serves as the starting point and determines the sheet selection criteria and, ultimately, the cost of the project.

Due to its high performance qualities and reasonable price, corrugated sheeting is used as a roofing material in private construction for:

• country houses, country houses, cottages;
• garage and outbuildings;
• gazebos, verandas, canopies;
• temporary buildings.

Naturally, the requirements when choosing a roof for each of the objects will be different. For example, when choosing corrugated sheeting for a residential building, you need to take into account the coverage area, roof configuration, number of slopes, average annual precipitation, installation complexity, difficulty of replacing sheets and other factors.

At the same time, the roof of the canopy over the porch or front door can be made from cheaper or practical material. Small area ensures high maintainability of the roof, and the level of precipitation does not have a significant effect on the roof.

2. Wave height of corrugated sheeting

If the choice of corrugated sheeting for a fence or wall begins with studying the types of coating, then for roofing, the main parameter will be the wave height, which determines two important parameters:

• rigidity;
• throughput.

Both values ​​have a direct impact on the life and quality of service of a corrugated roof. How bigger wave, the greater the rigidity and throughput, but the more expensive cost roofs. To understand what kind of corrugated sheeting is needed for the roof, you need to take into account the angle of inclination and the area of ​​the slopes.

Distinctive properties of roofing corrugated sheets:

• All types of corrugated sheeting intended for installation on the roof have a wave height of over 20 mm. Deeper profiling eliminates the possibility of water getting under the sheet;

• Since corrugated roofing sheeting is designed to be installed on a roof, this explains its configuration. Unlike the wall one, it has a wider bottom of the wave, which ensures free flow of water and increases the throughput of the roof;

• it is necessary to take into account the angle of inclination of the surface intended for covering. The lower the roof slope, the higher the wave height of the corrugated sheet should be;

• the angle of inclination determines the amount of overlap;

When installing high-wave corrugated sheeting on a roof with small angle the slope must be overlapped in one wave.

When installing a shallow wave, the absence of a high wave can be offset by an overlap of two waves. It is worth noting that this significantly increases the cost of a corrugated roof.

The longitudinal overlap also depends on the angle of inclination and requires compliance with the same calculations when overlapping; the smaller the angle, the greater the overlap.

• presence of a capillary groove. It serves as an additional barrier that prevents melt and rain water from entering under the profiled sheet, as well as to protect against condensation that appears when temperatures change. At the same time, the groove is not a panacea and will not save the roof from leaking when wrong choice wave height.

The capillary groove is profiled along the entire profiled sheet. During installation, it is covered with the covering wave of the next sheet of metal profile.

Manufacturers offer different types corrugated sheeting with wave sizes from 20 to 114 mm. At the same time, in private construction, corrugated sheeting with a wave height exceeding 44 mm is rarely used.

3. Dimensions of corrugated roofing

Technical characteristics of roofing corrugated sheeting are shown in the table (dimensions: thickness, width, length, weight, height and wave pitch).

Characteristics and dimensions of C21 corrugated sheeting

4. Type of corrugated sheet covering

Profiled sheeting is profiled sheet metal having protective covering, which protects the iron core of the sheet from rust.

When choosing which corrugated sheet is best to use for the roof, you need to know that there are two main types of corrugated sheets:

Unpainted corrugated sheeting

This category includes galvanized or galvanized aluminum profiled sheet, which has settlement period operation 5-15 years. Manufacturers rarely provide a warranty of more than 5 years. At the same time, aluminum-galvanized material will last longer, because In this case, the zinc will erode at a slower rate, which means the core will remain protected longer.

When choosing unpainted corrugated sheeting for the roof, you need to know that its service life depends on the thickness of the protective layer. According to GOST 24045-2010, the thickness of the galvanized coating should be 275 g/m2 or at least 90 microns.

Typically, galvanized corrugated sheeting is used for roofing temporary buildings, sheds and outbuildings.

Painted corrugated sheets

Has more degrees of protection in the form additional layers polymer coating.

Depending on the type of finishing coating, manufacturers provide a guarantee on the material for up to 25 years. The duration of the warranty and the estimated service life depend on the type of coating:

• roofing sheeting coated with polyester (PE) glossy or matte. The thickness of the glossy PE layer is 20 microns, matte - 35 microns. The service life and properties are approximately the same, the only difference is appearance. PE is durable, burns out slowly and evenly, suitable for use in the temperature range from - 30 to + 80 ° C;

• roofing sheeting with pural coating. Coating thickness 50 microns. The coating is based on polyurethane, which makes it resistant to abrasion;

• roofing sheeting coated with plastisol (PVC). Plastisol thickness is 200 microns.

• polydifluorionad (PVF2). Designed for use in difficult climatic conditions. Most durable coating for corrugated sheeting, however, the price of PVF2 corrugated sheeting is the highest.

5. Thickness of corrugated sheeting for the roof of a house

Manufacturers offer corrugated sheets with a thickness from 0.37 to 1 mm.

What thickness of corrugated roofing will be optimal?

Users and craftsmen advise using 0.45-0.5 mm. The choice of this thickness is justified by the fact that the higher wave height, compared to wall corrugated sheeting, provides the roof with the necessary rigidity. You should know that at large snow loads It is better to give preference to thicker metal. Some manufacturers provide stamping (additional stiffening ribs on the surface of the sheet) which increases the longitudinal rigidity of the corrugated sheet.

Advice. When choosing the thickness of the corrugated sheet, you should take into account that the deviation in metal thickness is +/- 0.1 mm (GOST 24045-2010 and EN 10143).

6. Color of corrugated roofing

Color has no effect on technical specifications corrugated sheets However, when choosing corrugated sheeting, you should take into account the color scheme of other buildings on the site, facade decoration and other factors, so that the roof of the house does not stand out from the overall design concept. The colors of the corrugated sheets correspond to the RAL palette (from the Finnish manufacturer Ruukki - the RR palette), which simplifies color selection.

Note. When choosing a color, you need to take into account that any coating is susceptible to ultraviolet radiation (fading in the sun). Therefore, if it is necessary to replace one sheet, it is possible that the shades will not match. The more time passes from the moment of installation of the roofing corrugated sheeting, the more it will manifest itself.

• appearance of the corrugated sheet. This is the easiest way to determine which roofing sheeting is better. Of course, one that does not have defects, chips, peeling or paint sagging, “stretch marks”, etc.;

• clear geometry of the dimensions of the roofing corrugated sheet. The manufacturer is obliged to provide the opportunity to measure each profiled sheet in thickness, length and width. Deviations greater than the minimum permissible (according to GOST 24045-2010) are a sign of a violation of the manufacturing technology. Even knowing how to properly attach corrugated sheets to the roof, it will not be possible to efficiently install obviously defective sheets (substandard);

• overlapping wave geometry. The first wave of the top sheet should very accurately cover the last wave bottom sheet. In this case, the likelihood of water getting under the sheet will be minimized;

• edge quality. Felling (cutting) of corrugated sheets in the factory is carried out special device- guillotine. This cut is very accurate and smooth (without nicks or paint sagging). This is an indicator that the sheet will not begin to rust from the edge;

• strength of roofing sheeting. Demonstrating color scheme the seller will most likely show you a selection of samples round shape. This shape was not chosen by chance; a round sample is more difficult to bend than a square one. Therefore, the sheet appears durable.

In practice, you can check the strength of a corrugated sheet in a simple way, applying a little force: with slight bending, the corrugated sheet will easily return to its previous shape, but with strong pressure, the bend will remain.

• Availability of specifications and layout of corrugated sheets. This does not apply to the choice of corrugated sheet directly, but it is mandatory when purchasing material for the entire roof. After all, you need to not only know how to choose corrugated sheeting for the roof, but in what order the purchased sheets should be placed, especially in the case of a roof with a complex configuration;

• corrugated sheet packaging. Its presence is important only at the stage of storage and transportation. It must be removed before installation. After prolonged exposure to ultraviolet light protective film on a profiled sheet, it cannot be removed and significantly spoils the appearance of the roof;

• guarantees and certificates for professional sheets. Allows you to judge the reliability and responsibility of the supplier.

8. Price of roofing corrugated sheets

Deciding which corrugated sheet for a roof is better and being guided only by the price of the material is obviously a wrong option. The cost of corrugated sheeting consists of the quality of the metal, its thickness, type of coating, the image of the manufacturer, the quality of the equipment used for profiling, storage and transportation conditions. All of these factors add to the cost while ensuring proper sheet quality.

If the price of corrugated sheeting is lower than the market price, this can only be explained by a decrease in the thickness of the metal, the thickness of any of the coating layers, or violations of production technology. Such a proposal should be treated with caution. After all, replacing a sheet of corrugated roofing is much more difficult than, for example, sections of a fence.

9. How to choose the right corrugated roofing - video

10. Pros and cons of a corrugated roof

A parallel comparison of the advantages and disadvantages of corrugated sheets for roofing.

Advantages

• low price of material;
• the ability to do the installation yourself;
• resistance to environmental factors;
• resistance to corrosion (in the absence of mechanical damage and defects of the leaf core);
• light weight;
• safety (fire and environmental);
• the ability to be used for installation on a slope of any configuration and with any angle of inclination (even absolutely flat);
• the ability to set the direction of water movement from the roof;
• aesthetic appearance of the building.

Flaws

• corrugated sheeting makes noise during rain and, even more so, hail (to eliminate it, it is recommended to lay OSB boards or OSB plywood);
• condensation accumulates on the surface (it is necessary to do good vapor and waterproofing);
• corrugated sheet is prone to accumulation static electricity(grounding required);
• Rust appears in the places of drilling and cutting (carefully treat such places with paint or Movil).

Conclusion

In summary, we note that you can choose corrugated sheeting for a roof without having the experience of professionals, be quite critical of the seller’s slogans, familiarize yourself with GOST and know for sure that the phrase “price and product” best characterizes the material.

With a competent approach, the buyer should be interested not only in strength and color, but also in the thickness of the corrugated roofing sheeting.

Since the market offers profiled sheets with different operational parameters, accept correct solution It can be difficult when purchasing this material.

To decide on the choice of corrugated sheeting, you need to focus on the angle of inclination and many other characteristics of the roof.

Application and properties of corrugated sheets

What kind of corrugated sheeting to cover the roof is decided after assessing the location of its installation. The type of building is main criterion choice of material, since material costs depend on it.

Typically, profiled sheets are used in roof construction. country house, cottage, garage, utility room, gazebos and verandas.

Each type of building has its own requirements regarding roofing.

For example, if you need to choose corrugated sheeting for a roof, then you need to take into account the coverage area, the type of roof, the number of slopes on it, the average amount of precipitation, installation features and difficulties that may arise when replacing or repairing the material.

If the owner of the house has firmly decided that he will put corrugated sheeting on the roof, then he needs to evaluate the height of the wave, which affects the rigidity and throughput of the roofing.

These characteristics determine how long and how well the roof will serve. The larger the waves on the profiled sheets, the greater the rigidity and throughput. On this basis, the cost of roofing also increases.

Corrugated sheeting should be selected taking into account the slope and area of ​​the roof slopes.

Still, this material is special, and its main characteristics are:

• wave height is more than 2 cm, which protects " roofing pie» from penetration of moisture into the inner layers;
• wide bottom of the wave, due to which rainwater flows off the surface of the material unhindered and improves the throughput of the coating;
• dependence on the angle of inclination of the roof that needs to be covered (the less the roof is inclined, the larger the waves of the profiled sheets should be);
• the relationship between the slope of the roof and the amount of overlap created when laying the material.

When laying corrugated sheeting with high wave crests on a roof inclined at a slight degree, you should overlap in one wave.

If the shafts are tiny, then one profiled sheet can be laid on 2 waves of another piece of material, but because of this, the cost of covering the roof with corrugated sheeting will increase slightly.

Typically, the roof is covered with profiled sheets with a wave height of at least 4.4 cm, although manufacturers sell material with shaft sizes from 2 to 11.4 cm.

Types of profiled sheets

Corrugated sheeting is a material that has a protective coating that prevents rust from appearing on the iron core of each sheet.

When choosing it, you need to decide which coating to take - unpainted or painted. There are significant differences between these types of material.

Galvanized or galvanized aluminum profiled sheets, which can last about 15 years, are not treated with paint.

Typically, manufacturers provide a warranty card for this material for no more than 5 years.

As a rule, aluminum-galvanized corrugated sheeting does not lose its appearance and quality longer, because zinc combined with aluminum weathers more slowly. This means that the core of the material is not so quickly left without special protection.

When thinking about how to choose unpainted corrugated sheeting, you need to keep in mind that the service life of the material is affected by its thickness.

As stated in GOST, this parameter for galvanized profiled sheets must be at least 90 microns.

Thanks to this thickness of corrugated roofing from weather conditions Temporary buildings, sheds and utility structures can be well protected.

Painted profiled sheets are considered a more reliable material because they have more protective layers. Thanks to this, they are covered by a good warranty - about 25 years.

Its duration is affected finishing coat corrugated sheets Upper layer profiled sheets can be represented by polyester, pural and plastisol.

Polyester coated material has a glossy or matte surface. It is durable and loses color slowly and evenly.

It is advisable to lay profiled sheets with a layer of polyester on the roof of a house located in a place where the temperature only rises to 80º and drops at least 30º.

When making a choice between glossy and matte finishes, you must be informed about the thickness of each material. The parameter of the first type of corrugated sheeting is 20 microns, and the second - 35 microns.

Profiled sheets coated with pural are resistant to abrasion, as they are treated with a polyurethane-based composition. The thickness of this material is 50 microns.

This figure is higher only for roofing corrugated sheets with a layer of plastisol - 200 microns.

Another type of material - polydifluorionad - is intended for installation on the roofs of buildings located in areas with a difficult climate, therefore it is considered the most durable, but is expensive.

When deciding what to cover the roof with, do not underestimate the thickness of the profiled sheets.

This indicator determines the service life of the roof and its ability to withstand the phenomena of capricious nature.

It is not difficult to guess that, depending on the thickness, corrugated sheeting is cheaper or more expensive.

The parameter that determines the price of profiled sheets ranges between 0.4 and 1 mm. Naturally, a thicker coating is much stronger and more durable.

When thinking about what size material is optimal, you need to start from the degree of load that the roof and house will have to withstand, although most buildings are suitable for corrugated sheeting, the thickness of which is about 0.5 mm.

If the profiled sheets are denser, they will increase the pressure on rafter system And load-bearing walls building. In addition, you will have to pay a lot for the pointless purchase of a thicker coating.

When tormented by the question of which corrugated sheet to choose for the roof, you should familiarize yourself with useful tips:

• the purchased roofing material must be visually assessed - see if there are any defects, chips, blurry spots and peelings on it;
• when purchasing profiled sheets, the geometry of the covering wave must be checked (the first “bump” of the top sheet should ideally cover the last “ridge” of the bottom sheet);
• When choosing a roofing covering, you should pay attention to the quality of the edges, which can only be precise and smooth, that is, without jagged edges, which could cause the material to begin to rust.

In addition, the clear geometry of the parameters of the profiled sheets is important. For each piece of corrugated sheeting, the length, width and thickness must be measured.

Significant deviations from the stated dimensions are evidence of assumption serious mistakes in the production of material.

If you buy corrugated sheeting with defects, then even if you are well versed in the technology of laying roofing, you will not be able to avoid poor-quality installation.

When purchasing corrugated sheeting, it doesn’t hurt to evaluate its strength. It must be borne in mind that sellers usually display round samples of the material in the window.

This is done for a reason, because rounded fragments of profiled sheets bend worse than square ones. That's why thin material You can mistakenly think it's heavy-duty and buy it, only to be very disappointed.

So, commit right choice Even a non-professional in construction can use corrugated sheets.

To do this, you need to ignore the seller’s slogans, study GOST, which informs about the thickness and other parameters of profiled sheets, and build on the phrase “price corresponds to quality.”