What kind of corrugated board to choose for the roof: brands and types. Which is better to choose a corrugated roof for a roof How to choose a corrugated roof for a roof

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Among numerous roof coverings the professional flooring enjoys the greatest popularity. If until recently metal and bituminous tiles were somewhat ahead of it, now, thanks to the most successful combination of quality and cost, corrugated board has confidently come out on top.

Due to the fact that the technology for the production of roofing material is very simple, corrugated board is produced by a huge number of companies, both very well-known and very small. Not all of them are honest, there are those who violate existing regulations. To make the right choice of corrugated board, you should know what criteria are regulated by state standards.

This is one of the most important criteria for choosing a corrugated roof. If its profile meets the regulatory provisions of GOST 24045-94, then you can be sure that the roof will withstand all the calculated loads without problems, its service life will not be less than planned.

GOST 24045-94. Bent steel sheet profiles with trapezoidal corrugations for construction. Specifications.

By what parameters are the technical conditions of the sheet profile controlled?

Assortment

The state standard classifies profiled sheets according to several parameters. Consumers are advised to buy profiled sheets for the roof only if their characteristics fully meet the existing operating conditions of the building and its architectural features.

Purpose

Depending on the purpose, sheets can be for roofing, for decking and railings, and only for wall railings.

The first are marked with the letter H, have the highest flexural strength. They have thick sheet steel, they have a high profile, which increases the mechanical bending strength, they are also made of alloy steel, which is characterized by high ductility values ​​and makes it possible to draw profiles with complex geometry without microcracks and loss of original properties.

Sheets for decking and fencing are designated by the letters HC, are used both for covering roofs and for wall fencing. If you buy them for the roof, then you need to know that such material has insufficient strength, to increase the reliability of the roof, you need to reduce the step of the truss system.

Wall profiled sheets are designated by the letter C, they are recommended to be used during the arrangement of fences. They have a low profile and a small thickness.

Some developers, in order to save money, try to use such profiles for roofs, but professionals do not recommend doing this. The fact is that in this case it is necessary to make a continuous crate of OSB, and this is very expensive and inefficient from a material point of view. All savings are leveled, but the risks of critical wetting of the wooden elements of the roof truss system increase. Wet wooden elements create many problems during the operation of the building.

Production material

Profiled sheets should be made of thin-sheet galvanized rolled products GOST 14918 with a zinc coating, having a protective coating with aluminum zinc TU 14-11-247-88, rolled products with aluminosilicon and electrolytic zinc coating. For each type of anti-corrosion coating, its own requirements for the thickness and quality of the layers are set, it is these values ​​that affect the life of the roof from the metal profile.

Prices for corrugated board

Decking

Video - Raw materials for the production of corrugated board

Technical data of the decorative coating

Depending on the type of profiled sheets, they can be without decorative surface coating and with such a coating. Paints and varnishes, coating technology and technical parameters must comply with the provisions of GOST 30246.

Rolled thin-sheet rolled products with a protective and decorative paint coating for building structures. Specifications. GOST 30246-94.

If the sheet is made of high-quality materials that meet all the requirements of current technical standards, then it is marked.

For example, H57-750-0.8 AD ML-1202/ML-1203 GOST 24045-94.

The symbols indicate that this is a roofing sheet with a profile height of 57 mm, a width of 750 mm and a metal thickness of 0.8 mm.

Keep in mind that the indicated metal thickness is given without protective and corrosion coatings. Enamel ML-1202 on surface C and enamel ML-1203 on surface D were used for decorative and additional anti-corrosion coating. Products meet the technical requirements of GOST 24045-94. For each batch of goods there must be an official document from the manufacturer with the same marking.

Technical requirements

The metal profile must meet the existing classes of zinc coating in terms of thickness and uniformity of the layer, type of crystallization and mass per square meter. If imported rolled metal is used for the manufacture of coatings, then its quality indicators must not be lower than domestic standards. Particular attention should be paid to this position when buying products from their Chinese or Turkish rolled products. Some domestic manufacturers also cannot fulfill all the provisions of the standard and sell substandard products. The thickness, composition and technology of applying paint and varnish coatings are controlled separately.

Important. Unfortunately, unscrupulous distributors take advantage of the ignorance of buyers and very often sell low-quality sheets at inflated prices. Developers cannot independently check the quality of galvanizing, measure the thickness of the paintwork and find out the composition of dyes. And it is very often impossible to find out the actual data, there are no official documents of compliance with technical requirements, you have to rely on the honesty of the sellers.

What determines the durability and reliability of corrugated roofing

They have loads of different intensity and nature, the better they resist them, the more durable and reliable the coating.

It must be borne in mind that all of the listed characteristics can deteriorate much if the laying technology is violated. Even the most expensive profiled sheets will have leaks, they do not appear due to their physical wear or mechanical damage. The cause of the problems is incorrect overlap, errors during sheet fixing, careless attitude to building codes and regulations.

Characteristics of decorative coatings

Modern paints have a significant impact not only on design, but also on operational properties - they protect the zinc layer from oxidation and scratches. The highest quality topcoats can increase the life of roofs by about 20-25%. What types of paints are used to cover the outer surfaces of profiled sheets?

Polyester

The most popular protective coating among users. The reason is good performance at a relatively low price. The surface can be matte or glossy. Suitable for all climatic zones, not afraid of heating and low temperatures. Does not fade under the influence of sunlight. The coating is plastic, not afraid of bending, has excellent adhesion to metal surfaces. The thickness of the paint layer is not less than 35 microns. The disadvantage is low mechanical strength, it is easily scratched, the lower layers of the protective anti-corrosion coating open.

Pural

The thickness of the paint is 50 microns, the composition is modified with polyamide in order to increase physical strength. It retains its original characteristics when heated to a temperature of +120°C. The disadvantage is that sharp bends are not recommended. Microcracks may appear in these places, over time they tend to expand. It is used quite often, at a cost slightly more expensive than polyester.

Plastisol

The thickness of the coating, depending on the type of metal profile, can be 200 microns, due to which the surface is embossed. The coating is very resistant to mechanical damage, has special additives that protect against the negative effects of UV rays.

PVDF

The most modern, high-quality and expensive coating. It is rarely used for metal profiles due to the high cost. Coating thickness up to 30 microns. The composition includes 20% acrylic and 80% polyvinyl chloride. Practically does not react to ultra-violet radiation. It tolerates high temperatures of heating and cooling. It is characterized by the highest mechanical strength, has good ductility.

Color influence

When choosing the type of paint and varnish coatings, you need to pay attention to their color. It should correspond to the architectural style of the building and look harmoniously with adjacent structures. Depending on the country where the manufacturer is located, the color scheme of roofing can be systematized according to RR, RAL and HTS standards. We most often use the RAL system, it has the most easy-to-remember designation and takes into account a large number of colors.

Each coating is indicated by a four-digit code, in total there are more than a thousand options in the palette, but in practice profiled sheets have about ten varieties. The rest are almost never used, in housing construction there is no need to use such a wide variety of color schemes.

1. Appointment of professional sheets. The ideal option is to choose a material with the letter H, these sheets have the highest bending strength.

   

   If there is a desire to buy universal roofs of the HC type, then the slope angle cannot be less than 35 °. Otherwise, there is a possibility of formation of critical deflections or fractures. The risks increase if the rafter system and the crate do not take into account wind and snow loads, the structure is not resistant to dynamic and static loads.

   

2. Profile height and sheet thickness. The smaller the angle of inclination of the slopes, the thicker the sheet metal should be and the higher its profile. On shed roofs with an angle of inclination of ≈20°, the thickness of the metal is at least 0.5 mm, the height of the profile is more than 30 mm.

   

   You need to know that if the thickness of the metal has a great influence on the price of the roof, then the height of the profile increases the cost slightly, but the strength increases markedly. It is recommended to test the sheet for bending before installation, estimate its weight. But only professionals can do such a quality check, they have experience comparing different types of profiled sheets.

3. Name of manufacturers. You should not pay attention to the guarantee, in practice there have not yet been recorded cases of applying to the judicial authorities with claims against manufacturers due to the appearance of leaks in the roof. Companies will always be able to find any violations during installation, indicate the wrong choice of sheet type depending on the climatic conditions of the location of the structure, etc. In addition, most stores that sold building materials will no longer exist in 20-30 years, will not to whom will file material claims.

   

Visual determination of the best corrugated roof

It is advisable to go to the store with an experienced proven builder, he often has to meet with various types of corrugated board, which allows you to quickly distinguish counterfeit goods from high-quality ones.

What details should be paid attention to?

1. On the reverse side of the sheet there should be a designation of the type of profile. Such designations are not applied by sheet steel suppliers, but by coating manufacturers. On bending machines there is a special apparatus for marking with resistant paints. The absence of designations indicates outdated production lines or a reluctance to indicate product data and contact details of the manufacturer. In both cases, this should alert potential buyers.

   

2. The surface of the sheets should be inspected. They may or may not have a special protective film. Many consumers, in order to save money, order sheets without a protective film.

   

   If there are deep scratches, dents, dirt, etc. on the surface, this indicates a low production discipline at the enterprise, unprofessional employees, faulty bending lines and violations of the recommended manufacturing technology. Damage can occur during production, storage and transport.

   

   Particular attention should be paid to the presence of foreign inclusions on the surface of the paintwork. A metal profile with such defects is categorically not recommended for use. A poor-quality finish indicates that the rolled sheets were prepared at unlicensed enterprises, but in China or Turkey. European goods never have the above described defects.

3. Try to bend the profile with your fingers. The appearance of a bend line even at large radii indicates a low quality of the metal. The profile is made not from expensive alloy steels, but from the cheapest structural ones. Their physical and operational characteristics are insufficient for use as roofing materials.

   

4. Price. This setting should be treated very carefully. If earlier low-quality profiled sheets were sold only at very low prices, then at present there is no such obvious difference. Unscrupulous sellers know that domestic buyers automatically consider expensive professional sheets to be of high quality and set high prices on purpose. If the product is expensive, then all documents on quality compliance, designations, addresses and company names are always present, this is an additional advertisement for responsible manufacturers, they always designate their products.

   

Important. Always try to match the color of the protected areas of the sheets with the exposed areas. If there is a large difference in color shades, then this is direct evidence of poor quality.

conclusions

It is best to buy goods from manufacturers, and not from intermediaries, they have all the accompanying documents that allow you to objectively evaluate the actual quality of the roof. Today this is no problem. There is a convenient delivery system, it is possible not only to choose the appropriate version of the metal profile, but also to get professional advice on how to use it.

Most major manufacturers provide services for. For this, special departments with professional employees are created. They have extensive practical experience in solving various problems that arise during the production of works. No theoretical articles can provide for all situations that arise in practice. Experienced roofers are able to independently make the only right decisions in each case. The advice of such masters helps developers avoid annoying mistakes.

You should never be guided only by price when choosing a coating. The roof is a very important architectural element of any structure; not only durability, but also comfort of living and safety of operation depend on its reliability. It is not recommended to build a cheap roof, repair work will always cost much more than saving on the quality of building materials.

Prices for metal tiles

metal tile

If you have already chosen corrugated board, it's time to do the calculations. It is important to correctly calculate the amount of corrugated board on the roof so that you do not have to buy additional material or there is not too much left over. You can learn how to do calculations. And it is easy to find out the required amount of materials for the crate using our construction calculator.

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

The right choice of corrugated board for the roof of the house

Decking is metal embossed sheets with a colored polymer coating that protects the metal from corrosion and prolongs its service life. Despite the apparent simplicity of the structure, corrugated board is presented 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.

Decking provides good roof protection

Types of corrugated board and their features

The arrangement of the roof requires the use of quality materials, since the roof is always exposed to climatic factors and must be durable. These requirements are met by three main types of material:

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

  Galvanized sheets are convenient for arranging the roofs of utility buildings

• wall (C) or load-bearing (H) material with a polymeric 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, profile shape.

  Roof sheets can be any color

All options are made of rolled steel, and the relief surface is created by cold profiling. At the same time, the technical characteristics of the sheets depend on the thickness of the steel, the configuration and the depth of the profile. High-quality corrugated board for the roof of the house must meet the following indicators:

• profile height from 20 mm;
• the presence of a capillary groove for improved moisture removal (the bearing corrugated board has a groove, and there is no capillary outlet on the facade material);
• the polymer coating should not have scratches, different thicknesses 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 brands of corrugated roofing

The main types of corrugated board 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 bearing capacity of the material, since snow, rain and wind have a significant impact on the roof.

The corrugated board protects the roof well from climatic factors

Demanded brands of 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 crate with a step 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 form of a trapezoid and has a height of 21 mm, steel thickness - from 0.4 to 0.8 mm. The weight of 1 m 2 can be from 4.45 to 8.4 kg, respectively, the minimum and maximum thickness;

  S-21 corrugated board is universal and is used both for roofing and for facades

• RN-20 has analogues under the markings C17 and MP20, which have almost equal characteristics. Sheets can be galvanized or color coated. During installation, a lathing step of up to 0.8 m is observed. The height of the trapezoidal corrugation is 20 mm, and sheets are produced up to 12 m long, 1100 mm wide;

  The parameters of the MP20 brand corrugated board make it possible to use this material for roofing

• grade S-44 has additional stiffeners, is made of steel with a thickness of 0.5–0.9 mm, the height of the corrugation is 44 mm, the useful width is 1000 mm, and the sheet length can be from 0.5 to 12 m. wall type, can be galvanized or painted with a polymer composition for corrosion protection;

  Sheet profile 44 mm provides rigidity of the coating

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

  The capillary channel improves the removal of moisture from the roof

Marking features

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

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

Video: features of the choice of corrugated board

Coating options

In addition to the thickness of steel, the height of the corrugations 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, which provides basic protection for the metal. This option is less durable than painted, but more affordable. It is suitable for temporary structures, domestic buildings, built in any climatic conditions.

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

Polymer

The polymeric covering - the best means of protection of metal against corrosion. Such a layer is presented in several versions, differing in 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 matt, and the layer thickness is 20 µm and 35 µm respectively. The material can be operated at temperatures ranging from -30° to +85°C and has a service life of about 10 years;
• Pural (Pural) is applied to steel sheets with a layer of 50 microns thick. Resistant to abrasion, service life of about 15 years. This protective layer characterizes the 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 board high strength and UV resistance. Service life is about 25 years. Sheets with this coating are more expensive than those with polyester or pural protection. The coating is suitable for regions with a temperate climate, marshland;
• polydifluorionad (PVF2) is designed for operation 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 strength and provides the material with a service life of more than 30 years.

Most modern public and residential buildings are covered with metal roofing materials. These include metal tile and corrugated board. They are made using a similar technology, so the only difference is in the shape of the pattern. If the first one is made in the form of a tile, then the second one has the form of longitudinal ridges imitating slate. To better understand which corrugated board to choose for the roof, you need to study its varieties and understand the meaning of the marking.

Classification of profiled roofing sheet

Profiled roofing sheet is produced by cold-rolled sheet metal. The product has a comb surface. This stiffens and allows water to flow down the grooves formed by the ridges. Combs can have a cross section of various geometric shapes, ranging from a triangle to a trapezoid. This does not affect the mechanical properties in any way, but it creates variety when choosing a material. Therefore, it does not matter which corrugated board to choose for the roof: with triangular or rectangular ridges. It's just a matter of consumer taste.

Types of protective coatings

After the rolling mill, the profiled sheet enters the workshop, where it is electroplated protectively. Protection is of two types:

• zinc coating involves the use of zinc salts as a working substance. As a result of electrolysis, metallic zinc settles on the sheet, covering it with a continuous layer. This metal does not interact well with oxygen, which guarantees excellent protection of steel from corrosion. The more zinc was spent, the stronger the protection;
• aluminum-zinc coating is produced using the same technology, only aluminum salts are added to zinc salts. They are cheaper, so this coverage is more budgetary. In this case, the degree of protection is reduced, which makes it necessary to make another decorative coating of polymeric materials and dyes.

The top color coating is more of a decorative function, as it is not very durable. However, it can somewhat enhance the basic protection.

Types of decorative coatings

Decorative coating also comes in several types:

• Glossy polyester is the easiest and cheapest coating option. During installation and operation, it quickly loses its appearance due to scratches and chips;
• matte polyester has greater reliability and resistance to mechanical stress. Its structure is similar to velvet, and the thickness is greater, which allows it to retain color longer and not give glare;
• pural is a polyurethane, with the addition of polyamide, a coating having a thickness of 50 microns. It has high reliability, immunity to low air temperatures and ultraviolet rays. Pural is best suited for application to roofing sheets;
• plastisol is the most reliable of all types of coatings. The thickness of the PVC layer is 200 microns. Such a polymer coating has a relief embossing and a dashed notch. It is intended for operation in harsh climatic zones, has resistance to mechanical stress, and is very durable.

All these coatings are applied to a layer of paint, which can be of various colors. The name of the color may vary from manufacturer to manufacturer, but the most common are shades of red, brown, blue and green. You can find bright orange, yellow and purple options for corrugated board. What kind of corrugated board to choose for the roof of your house, each owner decides according to his color preferences.

Types of corrugated board for the intended purpose

Based on the scope of the material, the following types of profiled sheet can be distinguished:

All types of corrugated board are cut into standard sheets with a length of 1.5 to 12 m. At the same time, at the request of the customer, manufacturers can cut sheets of any required length.

How to read the marking of corrugated board

As an example, you can take the marking: HC35-0.5-750-12000. It is easy to decipher it: HC35- means that this is a wall bearing sheet with a thickness of 35 mm. The second number is the thickness of the sheet - 0.5 mm, the third - the width of 750 mm, and the fourth - the length of 12000 mm. The allowable loads on the profiled sheet depend on these characteristics. There is a special load table for various types of corrugated board. The permissible load depends on the thickness of the sheet, the distance between the ridges, their height and varies from 50 to 960 kg/m².

Taking into account that sheets with PC marking are used for the construction of the roof, it is necessary to decide which corrugated roof to choose.

What decking to choose for the roof

Before you start choosing a roofing material, you need to learn the following important things that you should pay attention to when buying:

• a product marked - "State Standard" (GOST) is preferable to buy than - "Technical Specifications" (TU), since state requirements are always higher than the standards of the manufacturer itself;
• when calculating the area of ​​\u200b\u200bthe roof, 200 mm tolerances must be taken into account;
• you can not buy too cheap non-galvanized sheets, which will quickly rust and collapse under the influence of adverse environmental conditions.

So which roof decking to choose from the options listed? Experts advise making a choice taking into account the region of residence, since climatic conditions are crucial in choosing.

Among the main options for corrugated board, which can cover the roof, there are:

In addition, H-57, 750 (900), H-60, 75 are used in roofing, depending on the required bearing load.

If the question arises, which corrugated roof to choose, you should not discount such a parameter as colors and decorative properties. After all, a roof that harmonizes in color and texture with other buildings on the site looks much more attractive and creates the impression of the integrity of the entire architectural environment.

Features of mounting corrugated board on different types of roofs

The general rules for installing corrugated roofing on the roof are as follows:

• the crate is made solid or in increments, but no more than prescribed for a particular brand of sheet;
• a film or rolled vapor barrier is laid on the crate;
• sheets are fastened with special roofing screws with rubber gaskets along the waves.

For different types of roofs, the rules are somewhat different. So, flat roofs begin to close from the right edge. The installation of tent-type roofs is carried out simultaneously from two sides, and they start from the highest place of the slope.

If you decide correctly which corrugated roof to choose and lay it in accordance with the requirements, you will get a beautiful and reliable roof.

When choosing a roofing material, very often buyers want to find the best option for quality and price, which combines corrugated board quite well.

There are several types of this material, the difference between which is not understood by everyone.

That is why before you make a purchase, you need to find out the most detailed characteristics of each of them, so as not to miscalculate, and in the future only enjoy the convenience and comfort.

How to choose corrugated board for the roof of the house and not make mistakes? We will talk about this further.

Like all other roofing materials, corrugated board has its own certain advantages and disadvantages. Precisely because of the fact that this material has much more positive qualities than negative, many buyers give their preference to him. Benefits often include: characterizing corrugated board:

• Waterproof;
• Long service life, reaching up to fifty years;
• Fortitude to high temperatures and fire;
• Sustainability before climatic precipitation, as well as wind;
• Ecological safety;
• Fairly light and fast installation process and installation;
• Big choice various color schemes for any desires of the client;
• light weight;
• low price;
• High bending strength.

Therefore, to determine the wind load in each specific case, the calculated data must be multiplied by the ratio of the height of the roof and the length of its projection onto a horizontal surface.

When choosing, you should also not forget to add the mass of the material itself., since it must also withstand itself.

CAREFULLY!

The technical characteristics of each type of flooring indicate the maximum load that the material can withstand. Having found the optimal value, you only need to calculate the number of sheets you need.

It is best to use brand N corrugated board for roofing., which is a load-bearing material capable of withstanding high pressure. Depending on the installation method and the type of flooring itself, it can withstand from 184 to 916 kg / m2. This is directly affected by the crate, sheet thickness, corrugation shape and the presence of stiffeners.. An additional role is also played by protection in the form of a paint and varnish or polymer coating.

What is the best decking for a roof? One of the best options is the H series

Useful video

How to choose the right roofing sheet professional opinion:

Conclusion

Decking is a fairly high-quality and convenient material for covering buildings and structures, which is why it is very popular. Having chosen its optimal type, you can forget about the problem of protecting your home from all types of precipitation for a long time. In addition to its functionality, corrugated board is also quite an aesthetic material that can give the building a beautiful and attractive look.

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