Which corrugated sheet is best for a roof - tips for choosing a roofing sheet. Which corrugated sheeting to use for the roof: tips for choosing corrugated sheeting for the roof of a private house Corrugated sheet roofing technical specifications

Profiled metal sheets are widely used in construction. Among the assortment of this material, roofing corrugated sheeting, represented by several brands, especially stands out. The choice of a specific option is based on the characteristics and features of each brand, and for this it is important to know the properties of the material.

Roof sheeting

You can create a metal roofing not only using metal tiles, but also corrugated sheets. This material is steel sheets, having a certain thickness, a wavy surface and equipped with a protective colored coating made of a polymer composition.

A corrugated roof is easy to maintain and looks solid

Corrugated sheeting is also used for cladding walls and installing partitions in non-residential premises, strengthening fences and even inside fire door panels.

Sheathing with corrugated sheets is inexpensive, but perfectly decorates the appearance of various buildings

A common feature of all types of corrugated sheets is the type of coating.

After shaping, sheets for any purpose are galvanized (coated with a thin layer of zinc). This way they acquire a silver color and basic protection against corrosion; cutting them is no longer advisable. But on the roofs of houses, sheets with a polymer colored coating look more aesthetically pleasing.

The use of corrugated sheets allows you to obtain an inexpensive and durable roof. The technology for manufacturing profiled sheets does not require large expenses, but at the same time provides high performance material. Its advantages also include: simple installation on the lathing and smooth surface, promoting snow melting in winter.

Pitched roofs covered with corrugated sheets can be easily and quickly repaired if necessary

All brands of profiled sheets intended for roofing have general characteristics. These include:

• simple fastening technology;
• possibility of partial replacement of the coating;
• service life more than 15–20 years;
• variety of shades and durability polymer coating to ultraviolet;
• smooth structure;
• resistance to humidity.

Corrugated sheeting is suitable for roofs with different slope angles, however, there are certain installation requirements. For each type of structure, these rules are individual, so before starting installation, the design features of a particular roof are taken into account.

Video: replacing a gable roof covering with corrugated sheeting (fast motion)

Types of profiled sheets

Corrugated sheeting is presented in a wide variety, where all types are classified according to many criteria. The main parameter is the purpose of the material. The option marked “C” means that the material is intended for walls, partitions, fences, and sandwich panels. The thickness of this type of sheet is from 0.5 to 0.7 mm, and the profile height can be from 8 to 44 mm.

Wall corrugated sheeting is easy to install and has a lower cost

The most durable material is the one marked “N”, which means “load-bearing”. Such sheets are designed to create strong, stable and durable structures: interfloor floor slabs, permanent formwork, steel fences etc.

U load-bearing type The steel thickness ranges from 0.6 to 1 mm. The weight of one sheet depends on the dimensions, and the coating is often colored. The sheets can withstand significant loads and temperature changes, are resistant to humidity and ultraviolet radiation, and are also equipped with an additional stiffening rib on the bottom of the corrugation.

The main parameters of the sheet are its thickness, profile height and dimensions

The option marked “NS” is considered universal: it is suitable for fences, floor slabs and formwork, partitions and wall decoration. All sheet profiles are equipped with additional stiffening ribs that increase its strength. The thickness of the elements is from 0.4 mm, and the coating is made of zinc or polymer. The profile has a trapezoidal shape.

Brand NS44 has a profile height of 44 mm and additional stiffening ribs along the bottom and top rows

This classification of material allows you to quickly determine the desired option.

It is worth considering that each type of marking includes several brands of sheets with different parameters, but a general purpose.

Video: main types of corrugated sheets

Photo gallery: options for roofs made of corrugated sheets

Corrugated sheeting is an ideal solution for large gable roof: she hides during the day Profiled sheets are suitable for complex options roofs: hip and half-hip A detached garage can be completely sheathed with corrugated sheets: both walls and roof Corrugated sheeting can be easily supplemented with components, covering all joints with them A two-tier roof can be covered with corrugated sheets different colors, visually separating one tier from another Profiled sheets go well with brickwork Sheets are issued different lengths, so it's easy to pick suitable option for any design

Brands of roofing corrugated sheets

Of all the existing brands of sheets, there are options that are best suited for external roof coverings. Here are their features:

• profile height more than 20 mm - does not allow moisture to accumulate under the sheets;
• trapezoidal profile shape - for better drainage of precipitation;
• the presence of a capillary groove (additional stiffener);
• polymer coating made of pural, plastisol.

In this case, attention is required to the height of the profile, which depends on the angle of inclination of the slopes. The smaller the slope, the greater the wave height should be.

Corrugated sheeting is used for pitched roofs, but it is important to choose the right coating model

The following grades of metal sheets have the necessary properties for roofing:

• C21 - wave height 21 mm, profiled sheet width 1051 mm, working width 1000 mm. Sheet thickness: 0.35 mm or 0.7 mm or 0.8 mm. There is no capillary groove on the profile. The material is good for roofs with slopes of more than 45°. The polymer coating protects the metal from corrosion and ultraviolet radiation;

  C21 corrugated sheeting is suitable for roofs in regions with light snow loads

• H57 - wave height 57 mm, working width of the corrugated sheet 750 mm, steel thickness 0.6–0.9 mm. The corrugation pitch is 187.5 mm, and the weight of 1 m 2 of material with a thickness of 0.8 mm is 9.19 kg. The lower part of the wave is supplemented with a stiffening rib. The brand is used for flat roofs or in regions with a large number precipitation;

  H57 sheets have a high profile, so they are good for various types of roofs

• H60 - wave height 60 mm. The corrugated sheet is made from rolled steel with a width of 1250 mm, and after formation it acquires a width of 902 mm. There is a stiffening rib at the bottom. During manufacturing, galvanized material is coated with a polymer colored component;

  Stiffening ribs are present in almost all brands of sheets that are best suited for roofing

• H75 - wave height 75 mm, steel thickness 0.65–1 mm, sheet length 0.5–14.5 m, working width 750 mm. The trapezoid pitch is 187.5 mm, and the weight of 1 m 2 with a thickness of 1 mm is 12.87 kg. The corrugation has complex shape and stiffening ribs in the lower part, which makes the material as durable and resistant to mechanical loads as possible;

  Polymer coating protects the material from moisture and damage

• Н114–600 - total width 646 mm, working width 600 mm, steel thickness 0.8–1 mm. Sheet length from 0.5 to 13 m, trapezoid pitch 200 mm, stiffening ribs on all parts of the corrugation. Polymer coating.

  Grade N114–600 is in demand for high-reliability structures

Before choosing a brand of corrugated sheeting, it is necessary to take into account the angle of inclination of the slopes and installation features.

Advantages of using corrugated sheets

Affordable prices and a variety of brands make profiled sheets in demand. This roofing material has the following advantages:

• the elements are easy to install yourself;
• the final cost of the coating is significantly lower than that of roofs made of other materials;
• variety of shades and aesthetic appearance of the building;
• application on roofs with any slope, as well as on flat ones;
• environmental friendliness and fire safety;
• light weight and resistance to mechanical stress.

The corrugated sheet covering allows you to set the direction of rainwater on the roof. To do this, when installing the sheets, the corrugations are directed to the desired area, and water flows through them into a special gutter.

Video: advantages of corrugated sheeting, features of its production and application

Service life

The durability of the material largely depends on the outer coating.

More simple option is zinc: the maximum thickness of this layer can be 25–30 microns. Such a roof will last more than 30 years without serious damage.

Galvanized corrugated sheeting lasts more than 25–30 years without changing its appearance

A composition of 55% aluminum, 1.6% silicon and 43.4% zinc forms an aluminum-zinc coating. Material with such a layer can last up to 40 years in a moderately aggressive environment: middle lane Russia without extremely low or high temperatures.

The low characteristics are due to the fact that zinc coating (or zinc-based coating) does not withstand sudden temperature changes, prolonged exposure to humidity and ultraviolet radiation. Therefore, such material is beneficial only for temporary buildings.

Zinc or zinc-alumina sheets are suitable for warehouses and industrial buildings. For residential buildings, it is necessary to use elements with a durable polymer coating.

Buildings made of galvanized sheets are not very tall performance characteristics and are used as “temporary buildings”

Polymer compositions are more diverse and include organic and synthetic components. Depending on the ingredients, polymer layers are divided into the following types:

• polyester (PE) - inexpensive, widespread, with universal characteristics. Can be used for various designs. Material with a matte or glossy layer of polyester 25 microns thick will last about 30–35 years;
• plastisol (PI) - applied to metal sheets with a layer of 180–200 microns, resistant when used in an aggressive environment (in chemical industry). It fades slightly in the sun, but the structure is not disturbed. Plastisol allows you to use corrugated sheets for more than 40–45 years;
• pural (based on polyurethane) - layer thickness is about 50 kmk, maximally resistant to chemical, climatic and mechanical influences. The service life is more than 50 years.

The choice of colored corrugated sheeting for a roof is also based on the type of coating, because each of them has its own properties and makes the material durable in different ways.

How to calculate roof material consumption

After determining the appropriate brand, you should calculate required quantity material for high-quality roofing.

To do this, you need to determine the area of ​​each slope, and then add up all the data and find the total roof area. The total area is then divided by usable area one professional sheet. The result obtained will indicate the number of sheets required for arranging the roof.

A roof covered with corrugated sheets retains its appearance for several decades

The length of the sheets must correspond to the length of the slope. If this is difficult to do for some reason, then during installation the corrugated sheets are laid with an overlap. To cover the ridge, cornice and valley, additional parts will be required, which must have the same characteristics as the corrugated sheeting used.

Video: error when choosing the length of metal sheets

Reliable protection of the building from solar radiation, precipitation, emissions of harmful substances and other environmental influences - the main purpose of any roof. Two factors are key, and to successfully solve this problem, you need to select the material for the roofing and perform correct installation. On the market building materials A new roofing covering, corrugated roof sheeting, is becoming popular.

Material corrugated roofing characterized by durability, increased strength and decorativeness. It is used to cover the roofs of buildings for various purposes. It is made from sheet steel with a thickness of 0.5 mm to 1.2 mm using cold profiling technology.

The building material has a multilayer structure. The steel is coated with zinc, aluzinc coating or a protective film made of pural, polyester or plastisol, which ensures high corrosion resistance.

Compared to other types of roofing materials, corrugated sheets have low weight, but at the same time high bearing capacity, which allows you to withstand heavy snow loads.

Manufacturers produce profiled sheets of different parameters. They must comply with the standards of GOST 24045 94. The length of the sheet can vary from 1 m to 12 m, the width is most often 1.25 m, and the number of waves is from 5 to 8. For roofing, it is better to use material with 7 or 8 waves.

For profiled material Characterized by versatility of installation. Corrugated sheeting is laid on roofs with a slope. The tilt angle can be from 3º to 6º. With a slope of 3º or more, the amount of overlap increases, and the resulting joints are treated with sealant. During installation, the corrugated sheets are cut using the cold method. Cannot be used welding machines, abrasive tools or grinders, as the material loses color at high temperatures.

The color of the coating can be any: pure white, coal black, with a metallic effect, etc. The service life of the sheets is up to 50 years, warranty period provided by suppliers - from 10 years to 15 years. The manufacturer guarantees the buyer the preservation of the quality of texture and brightness of color.

Types of coatings

Coating of profiled sheets classified into protective and decorative. After the rolling mill, sheet steel is subject to protective treatment galvanic method. It comes in two types:

1. Zinc. The working substance used as a coating is zinc salts. As a result of electrolysis, metallic zinc is deposited on the material in a continuous layer. Zinc interacts poorly with oxygen, so the more of it, the higher the protection of the corrugated sheet from corrosion.
2. Aluminum-zinc. The coating technology is similar to the first option, only aluminum salts are added to the zinc salts. This coating is inexpensive, but the degree of protection of the material is low.

To increase protection, it is done decorative coating from dyes and polymer materials. It comes in several types:

Coatings are applied over a layer of paint. Each consumer chooses which corrugated sheeting is best for the roof of a house based on their color preferences.

Advantages and Disadvantages

The quality guarantee of the profiled sheet is manufacturer's integrity and compliance correct mode processing. Profiled sheeting is increasingly being chosen as a roofing material, as it has a number of advantages:

Despite so many advantages, this material also has a number of disadvantages. These include:

• poor noise protection;
• Condensation accumulates on the surface;
• grounding is required, as the material accumulates static electricity;
• Rust may appear where the material is cut or drilled.

The advantages of the profile sheet are undeniable, this will allow it not to lose its position on construction market materials.

If you lay low-quality material, this may lead to an early replacement of corrugated roofing. Studying will help in choosing roofing material technical standards. Thus, GOST provides standards for the quality of raw materials from which metal profile material is made, labeling principles, profile geometry, transportation rules and testing features.

A profile marked “H” or “NS” is suitable for the roof. Marking “H” is applied to sheets with increased load-bearing capacity, and “NS” is a universal marking, such sheets, except roofing works, used for organizing gates and fences. The numbers behind the letters are indicators of sheet height, steel thickness, installation width of the profile and maximum sheet length. Data is given in millimeters.

In addition to labeling, you need to pay attention to the following parameters:

You can choose a metal profile sheet for roofing work without having certain skills. The cheapest, but also short-lived, corrugated sheet is made of galvanized steel. As a rule, it is used for temporary structures.

Installation features

In order to install corrugated sheets, you will need a number of hand and electric tools, such as: a hammer, a long strip, a screwdriver, a marker, a tape measure, a silicone gun and a cord. You can cut profiled sheets with metal scissors, a hacksaw with fine teeth, electric cutting shears. Suitable for galvanized sheets circular saw, but only with carbide teeth, or an electric jigsaw.

Before the installation process need to calculate correctly amount of material. Laying of the profiled sheet is carried out according to the following scheme:

For high-quality and safe installation of corrugated sheeting, you must enlist the help of an assistant.

Roof sheeting- one of the most popular building materials, which combines good technical specifications, low cost and ease of installation.

The Russian market is represented by domestic enterprises. The sheet is produced by both large and small companies:

This is a minimum list Russian manufacturers quality profile sheet, which you can use as a guide when purchasing. Foreign manufacturers are poorly represented in this market. There is practically no import of such products, and export is minimal.

From the right choice Roofing material determines the durability, reliability and ease of use of the roof. However, deciding which coating to use without the advice of an experienced expert can be problematic. Advertising videos and booklets praise some materials, sellers stubbornly recommend others, which completely confuses the buyer. A roof made from low-quality profiled metal sheets will not last longer; it will bring more problems and repair costs to the homeowner than it will benefit. In this article we will tell you what types of corrugated sheeting for roofing there are, as well as what requirements for this material are regulated by GOST 24045-94.

Corrugated sheet metal is the most popular roofing material for arranging the roofs of outbuildings, outbuildings and industrial buildings; it is used a little less often in private housing construction. Corrugated sheeting, according to the definition of GOST 24045 94, is a material produced by cold profiling from steel. It has a multilayer structure; sheet steel 0.5-1.2 mm thick is used as the base of the corrugated sheet, onto which galvanic zinc coating is applied, and then polymer protective film from pural, polyester or plastisol. All types of corrugated sheets have the following performance characteristics:

1. Corrugated sheets used for roof construction have a high load-bearing capacity, which is formed by increasing the number of stiffeners. Corrugated roofing sheets, in accordance with GOST 24045 94, must withstand significant snow loads, as well as the average weight of a person.
2. Corrugated sheeting has high corrosion resistance. The polymer coating that covers the sheets protects the metal from contact with liquid, which prevents the appearance of rust spots.
3. Fairly light weight. Universal, roofing and wall types of corrugated sheets have a relatively small mass compared to other materials. Sheets size 1 square meter have a weight of only 5-7 kg, for example, the same area of ​​traditional ceramic tile covering weighs almost 17 kg. The light weight of the material will allow you to use a simple rafter frame for the roof and lattice sheathing in increments of up to 30 cm.
4. Different types of corrugated sheets are produced with different standard sizes. Most often, the sheets have an overall width of 1250 cm, and the length can range from 1 to 12 m.
5. According to GOST 24045 94, the profiled sheet can have 5,6,7 or 8 waves. The most popular are 7- and 8-wave corrugated sheeting, since its technical characteristics are better suited for roofing.
6. Versatility. Roofs with a slope of 6 degrees are covered with corrugated sheeting. Experienced craftsmen They claim that you can use this material starting from a slope angle of 3 degrees, if you make larger overlaps and treat the joints with sealant.

Pay attention! All types of corrugated sheets produced in accordance with GOST 24045 94 are cut and installed using the cold method, since the protective polymer coating on the surface of the material burns out when exposed to high temperatures. Installation work with the use of profiled sheets, they are not performed using a grinder, welding or abrasive tools.

Types of material

Corrugated sheeting is universal material, with the help of which many construction tasks are performed. To ensure that the technical characteristics meet the conditions of use, manufacturers produce various types corrugated sheets, differing in price, load-bearing capacity, shape, profile height and width, and dimensions. In accordance with GOST 24045 94, there are 3 types of profiled metal coating for roof:

Important! According to GOST 24045 94, corrugated sheets are divided into categories according to the technical characteristics of the material and purpose. Experienced roofing craftsmen recommend using products marked “H” and “CH” for roof installation. Only corrugated sheeting of these types has sufficient load-bearing capacity to withstand significant snow loads. In addition, the profile height allows for efficient removal of melted and rainwater from the ramp. The universal and load-bearing profiled sheets have a thick polymer coating that protects against corrosion.

Selection rules

Choosing a material that is of high quality and appropriate for the purpose of use is the key long term service, strength and reliability of the roofing covering. Without the help of a professional craftsman, it can be difficult to understand which corrugated sheeting is better. In order not to get confused in the wide range of corrugated sheets, focus on the following indicators:

1. Product compliance with GOST 24045 94 or other technical regulations adopted by the corrugated sheet manufacturer. Certification of roofing profiled sheets is a voluntary procedure, but the presence of such a certificate of conformity serves as a guarantee of the integrity of the manufacturer and the quality of the material.
2. Purpose. The material must match the installation location, so you need to use universal or load-bearing corrugated sheeting for the roof, and wall sheeting for fences.
3. Material thickness. To construct the roof, corrugated sheeting with a thickness of 0.8-1.2 mm is used, since it has sufficient strength to withstand the weight of a person and snow during the heaviest snowfalls.
4. Type of coverage. Corrugated sheets with zinc or aluminum coating are the cheapest, but do not resist corrosion well. More expensive brands coated with polymers (plastisol, polyester, pural) last much longer than usual.
5. Size. The size of the sheet must correspond to the geometry and area of ​​the slope. For large roofs You can purchase corrugated sheeting that is cut along the length of the slope, then during installation you will have fewer seams, which means the coating will be more reliable and durable.
6. Load-bearing capacity. The greater the load-bearing capacity of the corrugated sheet, the higher the profile waves. This indicator is important for regions with heavy snow load.
7. Color. Manufacturers produce profiled sheets for roofing in a standard palette. The shade of the material can be matched to the wall decoration.

Experienced craftsmen say that when purchasing corrugated sheeting, you should carefully study the packaging of the material. According to the requirements of GOST 24045 94, it must reliably protect the material from mechanical damage and contain information about the markings and characteristics of the coating.

Video instructions

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 colored 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 polymer protective coating suitable for residential roofs;

  Polymer coating protects metal from corrosion

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

  Roofing sheets can be of any color

All options are made from rolled 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, the 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 thicknesses or 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 of metal sheets for house roofing 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. The useful width of 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;

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

• RN-20 has analogues labeled C17 and MP20, which have almost equal characteristics. Sheets can be galvanized or coated with a polymer color. 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 make it possible to use 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 belongs to the universal type of corrugated sheeting, has a corrugation 35 mm high, usable width 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.

  The capillary channel improves the removal of moisture from the roof

Marking features

All types of profiled sheets have certain markings, which allows consumers to easily navigate when choosing from 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 purpose the sheet is intended. This is determined by the letters that the marking contains. There are several main classification options:

• "N" - load-bearing type 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” denotes a wall type of 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 Suitable for roofing, fences, 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. The 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 of external coating must be taken into account when choosing. 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 available in several versions, characterized by durability, resistance to climatic factors, durability, 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 with a layer thickness of 50 microns. 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. Coverage suitable for regions with temperate climate, 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.

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 is a necessary measure, and not just an aesthetic effect - this increases the strength and rigidity of the sheet 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

Corrugation height for roofing sheeting acceptable within 10-114 mm. Just based on the height of the corrugation and the thickness of the sheet, in the 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 the modern market, the most common marking sheets 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 is an 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 from 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 thing is done important requirement: for all products in mandatory there must be 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 development on roofing will be reduced significantly. 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?

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 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 can find the cheapest raw materials - Chinese, Indian or domestic, which have been stored for a long time in improper conditions and are 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 with 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 buy something already finished 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!