What is the thickness of the corrugated board to choose for the roof of the house. The choice of the optimal thickness of corrugated board for the roof. The main criteria for choosing corrugated board

After the walls of the house have been erected, the question arises about the choice of material from which the roof will be made. Manufacturers offer several coating options.

Metal tiles, of course, are beautiful and durable, but they are difficult to install, and they are relatively expensive.
Slate is practically little used already, although quite recently roofs were covered only with it. It is fragile enough and does not please the look.
Euroslate or ondulin made on the basis of cellulose. Its disadvantage is that it is short-lived.
Bituminous shingles made of fiberglass coated with bitumen. The downside is its fire hazard.
The corrugated board has strength, durability, absolutely does not burn and does not require special skills for laying. Modern design and wide range of colors.

A roof made of corrugated board will be the best price-quality ratio. The profile sheet is used in the construction of industrial, warehouse, retail facilities, private houses. Many people are interested in the question of how to choose it. You need to take this seriously, since the quality of the house covering, the retention of heat and dryness, directly depends on your choice.

Characteristics of corrugated board

The strength of the profiled sheet is influenced by the following characteristics: sheet thickness and corrugation height. According to GOST, for steel sheet bent profiles with trapezoidal corrugations, the sheet thickness can be from 0.1 to 0.6 mm, and the height ranges from 10 to 114 mm (for the roof, 20-60 mm is recommended). The larger these values are, the more durable the sheet will be. Strength characteristics also determine the number of stiffeners. Any type of profile sheet is marked with letters and numbers. The letters indicate the destination area and the numbers indicate the profile height. For example, a profile sheet for roofs has the designation "H", for roofing and wall - "НС".

If the profile is painted, then it is marked with the letters A and B. If there is a capillary groove on the profiled sheet that does not allow water to enter the roof at the joints of the sheets, then the letter R is placed on the sides of the painting of the profile.

Longitudinal profiles, in addition to trapezoidal ones, can also have the shape of a rectangle or a wave.

Profile sheets by type of coating

The type of coverage is of great importance. Two types are widespread: galvanized and with a protective and decorative polymer coating.

Galvanized steel sheet - The galvanized profiled sheet has an undoubted advantage - its price, therefore it is mainly used in the construction of industrial structures. In such profiled sheets, an aluzinc compound is used, which combines the anti-corrosion properties of zinc and aluminum. The corrugated board has a silvery surface and serves for a long time.

Profiled sheet with protective - decorative coating For additional protection of the profiled sheet, a polymer coating is applied to the galvanized sheet. Such coatings are widespread as polyester, plastisol, polyurethane (pural). They differ in that they have different thicknesses and different resistance to adverse factors.

You can choose any color of the coating. In addition to the standard colors, there are sheets with a metallic effect, with a pattern of fired ceramics, or with a wood effect applied by an offset method. The actual service life of coated profiled sheets is up to 50 years, the warranty period is 10-15 years without loss of color brightness and texture quality.

How much does a roofing sheeting cost?

The cost of roofing sheeting is influenced by a number of factors:

corrugation height and sheet thickness,
sheet length,
colored or protective paint,
the presence of zinc coating,
the quality of the polymer used for the coating,
the grade of the material from which the sheet itself is made,
Manufacturer country.

Considering all these indicators, the range of prices turns out to be quite large, from about 200 to 800 rubles per 1 sq. M.

What to look for when buying

If you buy a low-quality corrugated board, then in the future you will have to change the cracked coating. Therefore, when buying, be sure to pay attention to the following:

1. Appearance. The surface should be free of roughness and small cracks, smooth. In colored materials, paint should not come off. With slight bending, the profiled sheet should not break, but return to its previous shape. And with a strong one - keep the shape of the material.

2. Availability of a quality certificate for the product. You can also ask for consumer reviews of the product.

3. Useful length of sheets. It, preferably, should be equal to the length of the slope, because with short profiled sheets, it will be necessary to increase the number of transverse joints, which reduces waterproofing. Therefore, you need to know the length of your roof, plus add about 50 centimeters to it on each side for a place for a roof drain and for installation errors.

It should be noted that if you want to make a solid, strong and durable roof, then it is better to opt for a galvanized roofing sheet with a polymer coating. In the case of the construction of a temporary structure, it is better to use aluzinc material.

Video - How to choose corrugated board for the roof

Modern building trends are more capricious and changeable in fashion, as manufacturers, vying for the attention of buyers, offer more durable and attractive materials. The professional sheet, which 10-15 years ago could only be used for the roof of outbuildings, garages or industrial buildings, has changed a lot and has become a presentable coating, worthy of country cottages and townhouses. This evolution has occurred due to the improvement of the operational characteristics of the material, an increase in the service life, and an improvement in the appearance of the corrugated board. In this article, we will tell you how to choose a corrugated board to cover the roof of a house with high quality.

Profiled sheet - a roofing material produced on the basis of galvanized steel sheets, the thickness of which is 0.1 - 0.8 mm. It is produced using cold rolling technology and is used as a roof for the construction of the roof of residential buildings, outbuildings, and industrial facilities. The professional sheet is produced of the following types:

Important! Manufacturers produce unpainted and painted roofing sheeting. Galvanized steel itself has limited corrosion resistance, so it only lasts 8-10 years without a protective coating. Profiled sheet with polymer film resists moisture much better and has a service life of up to 30-35 years.

Performance characteristics

The assortment of corrugated board for roofing has hundreds of items, differing in color, thickness, weight and service life. All these characteristics ultimately affect the price of the material. The professional sheet is distinguished by the following parameters:

Thickness. The thickest sheets of 0.6-0.8 mm are used for the production of load-bearing corrugated board, which has high strength, resistance to deformation and high weight. The thickness of the wall grades is only 0.1-0.4 mm, they cannot withstand the weight of a person and are not used for roofing.
Zinc protection. Steel is called galvanized when a galvanized zinc coating is applied to the surface of the metal, which increases the anti-corrosion properties of the material. Depending on the amount of zinc per unit area of the base, there are 3 classes of professional sheet - business, standard and premium. In premium brands, at least 275 grams of zinc is applied per 1 square meter of steel sheet, and in business - only 126-200 grams. The thicker the zinc layer, the longer the service life and the price of such material.
Polymer or paint and varnish protection. The coating that gives the corrugated board color is also a protection against moisture penetration and corrosion. The professional sheet is painted with special compounds or by applying a special polymer film made of pural, plastisol or polyester. Polymer-based coatings are more resistant to temperature extremes, moisture, ultraviolet radiation and other external influences, and therefore last much longer.

Note! It is possible to determine which type the profiled sheet belongs to with a visual assessment. Pay attention to the wave height of the material. For the roof, more embossed marks are used so that precipitation can easily flow down the gutters. To build a fence or sheathe walls, corrugated board with a wave height of no more than 200 mm is used.

Advantages

When choosing a material for building a roof, homeowners often try to save money, but they fall prey to their shortsightedness when it starts to flow after a year. In order not to spend too much, but to lose in quality, you need to use high-quality material of a suitable brand. Corrugated roofing has the following advantages:

Experienced craftsmen must pay attention to the appearance of the corrugated board before buying. It should have the same thickness over the entire surface, a uniform paint and varnish or polymer coating, it should not have cracks, chips, scratches. Only with the help of high-quality material can you build a durable and reliable roof that will not let you down in the worst rain.

Video instruction

When building your own home, the future owner faces two main tasks, which sometimes seem to be mutually exclusive: to carry out all construction and finishing operations "conscientiously" and from high-quality materials and try to select these very materials so that there is an opportunity to significantly reduce the estimated costs. Decking belongs to the category of just such goods for construction, when the price does not scare off the number of zeros, and the result pleases the owner of the house for many years. Unfortunately, there are a lot of unscrupulous sellers who want to take advantage of the client's ignorance, so it makes sense to conduct a small educational program not on the topic of this building material.

Roof sheeting

Profiled metal sheets are widely used in private construction. They are also well suited for the roof, but the product must meet this purpose in all respects. The abundance of technical characteristics can be confusing, the main reference points should be the thickness of the corrugated board for the roof and the quality of the coating. It is extremely important to understand this, since manufacturers guarantee a quality result only when using various types for their intended purpose.

Roof from corrugated board photo

At construction markets and in stores, you can purchase a professional sheet for the construction:

walls (for example, outbuildings);
awnings;
fences;
for floors and ceilings;
for roofing works.

In order for a roof over your head to be reliable, it is worth taking a closer look at the building material itself.

Which corrugated board to choose for the roof

First of all, you need to understand that this material is a sheet of profiled metal, which, thanks to the many stiffeners, acquires exceptional strength and resistance to various physical influences, the ability to withstand sharp gusts of wind.

The raw material for it is rolled steel, which, by cold profiling, becomes corrugated sheets. Its technical indicators result from the thickness of the starting material, the profile configuration.

Reliability and good performance are also provided by sophisticated processing, which makes the corrugated board look like a puff cake.

The base is a sheet of steel.
Further, it has a zinc coating on both sides.
Next comes anti-corrosion protection. The passivation layer also covers the metal sheet on both sides.
An intermediate step in production is the all-round primer coating.
On the underside, the profiled sheet is treated with a layer of paint for protection, and a polymer coating is applied to the front side.

This production technology is not followed for all decking. Available for free sale:

steel version, made of ferrous metal without any additional layers of coating and processing;
aluminum or copper analogs of the material;
corrugated board, focused specifically on the construction of the roof. This one is produced in several variations: perforated, rolled, embossed for various textures, bent;
galvanized profile without polymer coating. It is similar to the above-described version with a layer of paintwork materials, but inferior to it both in appearance and in terms of service life. Its cost is much lower (up to 40%), and it is intended for the construction of fences, garages, outbuildings and sheds.

The listed types of products differ in thickness and overall dimensions. When buying, you should pay attention to the following nuance: the full width of the sheet may differ from the useful one. Builders distinguish the following types of professional sheets (the gradation is based on their purpose):

carrier;
front;
wall;
ceiling;
formwork.

Helpful advice when choosing

Given the type of protective coating, thickness and external characteristics of the sheet, the first and third types of profiles from the above list are suitable for the construction of the roof. At the same time, it is worth knowing that the carrier type of material, according to the ideas of the developers, has a special recess (called a capillary groove). Thanks to it, when installing an overlapping roof, an excellent drain for rainwater is obtained. In most cases, it starts from the ridge and goes down to the drain at the eaves. The wall version of the corrugated board does not have such a constructive solution.
If the choice is made in favor of a profiled sheet with a capillary groove, then when buying it is worth making sure that it does not bend. For some manufacturers, this groove lends itself to deformation, therefore, it becomes useless.

Another important point: the roofing material is perfect for the facade of the building, but in the reverse order, this feature does not work. Therefore, the facade corrugated board cannot be used for roofs.

Roofing sheeting brand

Like many building materials, profiled sheets are marked accordingly. The specialist can easily "read" the alphanumeric abbreviation and select the desired product. Frequently encountered options include:

C - 21... This marking characterizes a material with good stiffness to be used for roofing. Professionals recommend making a crate during its installation with a step of no more than 0.8 meters.
Designation NS - 44 and NS - 35 indicates that this profile is suitable for both fences and roofs. Both are strong enough, but the former has additional stiffeners, which makes it preferable.
RN - 20 is a brand of universal corrugated board. It will serve well both as a material for a fence, and as a roof profile, and as a cladding from the inside and outside of buildings. It has a capillary groove, and the dimensions of such a corrugated board for the roof are quite large - a working width of 1.1 m.

What is behind letters and numbers?

Letters "C" and "H" are the initial letters in the types of profiles: wall and bearing. For the roof, as noted above, the latter option is preferable.
The order of the numbers indicates the useful width, the height of the wave.
Profiled sheets made in accordance with GOST are considered to be more reliable and of high quality than materials produced according to technical conditions.

But in any case, the seller must have a quality certificate in stock.

Types of corrugated roofing

The main criteria when buying corrugated board for a roof will be its purpose and characteristics (indicated in the marking), cost, type of coverage, appearance and angle of inclination of the roof. The first condition was mentioned above, and the rest require a detailed explanation.

Decking material is available, but even in this case, no one wants to pay extra money. But quality cannot cost too little. The low price of corrugated board for the roof indicates that the manufacturer has clearly saved on this product. In general, the cost is added up depending on the thickness of the profile, the presence - absence of polymer or other coating and the scope of application.
It often happens that prices for the same brand differ in different retail outlets. Therefore, before making a purchase, it is worthwhile to do "reconnaissance", take price lists from several stores and compare them. Dealers have lower prices, but it is better to take material directly from the manufacturer. Buying without intermediaries is also beneficial because the manufacturer can fulfill an individual order: cut sheets of the required size or create a unique shade of polymer coating.
Experts will help to calculate the consumption of corrugated board for the roof, advise components and additional accessories. Similar consultations can be obtained online on the sellers' website. This opportunity should not be missed.
The paint layer can vary greatly in quality and affect the characteristics of the material. Among specialists, the most appreciated are the bright colors of corrugated roof sheeting with protection from plastisol (PVDTF), matte and regular polyester.

The latter is valued for its good decorative qualities, but a layer of such material is not distinguished by its high ability to withstand external influences.
PVDTF is a coating with high resistance to damage and fading. Its use also affects the increase in the price of professional sheet.
Polymers based on polyurethane are able to withstand aggressive environments and mechanical damage. Such a coating significantly extends the service life of the building material.
Profiled sheets for roofing without fail have a protective layer of zinc. Its thickness, by the way, can also be different. The larger it is, the higher the anti-corrosion properties.
Decorative coating also creates an additional protective barrier, although its aesthetic component worries developers much more. One of the advantages of corrugated board is precisely the fact that the variety of glossy and matte shades allows design ideas to roam.
External examination of the material is sometimes neglected, or only a superficial examination is carried out, for dents and obvious chips. Partial or complete dismantling of an already installed roof is not worth it to save half an hour on a detailed inspection of the material. Obvious defects will be visible immediately, but you need to take a closer look at the coating with an “armed eye”. The corrugated board will last a long time and will not crack if there are no following flaws:
1. slugs of paint;
2. obvious borders in the color transition, uneven paint coverage;
3. chips or microcracks,
4. peeling of the paintwork layer.
The sheet itself should be even, without chipping on the cuts and edges. With slight bending without effort, it will instantly return to its original shape as soon as it is released. In this case, traces of creases should not form, and even more so the profiled sheet should not break.
Roof angle is the last on the list, but it is far from being so in terms of its value. The load from precipitation in winter, strong gusty winds will have a greater impact on the roof, whose slope angle is greater. Depending on such a structural feature of the roof, it will be necessary to choose a thicker metal of the corrugated board, which will provide the required rigidity.

Roofing from corrugated board video

Following such simple recommendations will allow you to choose a truly high-quality material to protect the house and its residents from bad weather. And a purchase made with knowledge of the matter is a guarantee that the result will not disappoint, and roof repairs will not be required for a very long time.

Roofing corrugated metal tile

Roofing with corrugated board

Since there are several ways of laying roofing from corrugated board, and the material itself requires a special attitude, the description of the installation is worthy of becoming a topic for a separate conversation. But some nuances can be noted.

The overlap of the sheets, depending on the slope of the roof, is shown in the table.

If the angle of inclination of the roof is less than 12 °, then the use of silicone sealants is mandatory.

At the stage of preparatory work, the sheets are selected, and the organization of the method for lifting them one by one to the direct installation site. The fastening system must be arranged in such a way as not to damage the material. In strong and gusty winds, work is not carried out. Already on the roof, you need to check the deviation of the corrugated board from the base plane. The permissible indicator is up to 5 mm.

If we take the profiled sheet as the final layer, then the reverse order of installation of the roof will consist of:

from the fastening of the corrugated board;
creating a crate;
installation of a counter-lattice;
a layer of waterproofing material;
rafters, between which a layer of insulation is laid;
from a fixed edged board or plywood covering the insulation;
vapor barrier layer;
finishing from the side of the room.

The film for steam and waterproofing is fastened with an overlap with special tape, and matte materials are taken as insulation, especially if you plan to create a residential attic.
Cutting of sheets before installation is carried out using an electric jigsaw, a circular hand saw with fine teeth, a hacksaw. A grinder with an abrasive wheel is not used. The cut site is subject to processing with enamel for polymer coatings.
For fastening, self-tapping screws with rubber seals are taken. The final touch will be the installation of abutment strips: skates, parapets, wind and cornice elements.

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, type of roof and other factors.

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

Profiled sheeting is a metal embossed sheet with a colored polymer coating that protects the metal from corrosion and extends its service life. Despite the seeming simplicity of the structure, the 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 the grades of profiled sheets.

The corrugated board provides good roof protection

Types of corrugated board and their features

Arrangement of the 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 a colored polymer coating, which are inexpensive and are often used to equip the roofs of utility rooms;
Galvanized sheets are convenient for arranging the roofs of ancillary buildings
wall (C) or 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, profile shape.
Roofing sheets can be of any color

All variants are manufactured from coiled steel, and the embossed surface is created by the method of cold profiling. At the same time, the technical characteristics of the sheets depend on the steel thickness, configuration and profile depth. 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 supporting 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 grades of corrugated board for 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 effect on the roof.

The corrugated board protects the roof well from climatic factors

The demanded grades of metal sheets for the roof of the house have the following characteristics:

the material of the S-21 brand is characterized by high rigidity, and its installation is carried out on the lathing with a step of 90 cm. It can be with a polymer coating 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, the thickness of steel is 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 analogs under the C17 and MP20 markings, which have practically equal characteristics. Sheets can be galvanized or color-coated. During installation, the lathing step 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, 1100 mm wide;
The parameters of the MP20 brand corrugated board allow the use of this material for the roof
grade S-44 has additional stiffening ribs, it 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 length of the sheet can be from 0.5 to 12 m. wall type, can be galvanized or painted with a polymer compound to protect against corrosion;
44 mm sheet profile ensures the rigidity of the coating
NS-35 material belongs to the universal type of corrugated board, has a corrugation 35 mm high, useful width 1000 mm. The thickness of the steel is between 0.4 and 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

Features of marking

All types of profiled sheets have specific markings that allow consumers to easily navigate when choosing among a variety of sheet options. All the main parameters and characteristics of the material are indicated in the marking, making it very easy to understand for what purposes the sheet is intended. This is determined using the letters that the marking contains. There are several basic classification options:

"H" - the bearing type of corrugated board, which is the most durable of all options. Material with this marking has an additional groove along the profile, which increases the rigidity of the sheets. Elements marked "H" have the highest profile height, significant steel thickness.
"C" denotes a wall type of material used for cladding facades, creating lightweight 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 with a thickness of up to 0.7 mm, therefore they are not suitable for roofs subject to significant loads.
"NS" - material with average parameters between the two above options. Universal sheets are suitable for roofing, fences, lightweight 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. The sheets are presented in a galvanized version and with a polymer coating. Products marked "MP-R" are most suitable for roofs with any type of slope.

Video: features of the choice of corrugated board

Coating options

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

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

Polymer

The polymer coating is the best means of protecting 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 is applied to steel sheets with a layer thickness of 50 microns. Abrasion resistant, service life about 15 years. This protective layer is characterized by 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, resistance to ultraviolet radiation. 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, marshlands;
polydifluorionad (PVF2) is intended for operation in the harsh climate of the North or Siberia, with sharp 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 over 30 years.

Roofing corrugated board has occupied the most leading positions in the building materials market for many years. Its unique properties and practicality allow it to be used in a variety of conditions, and the price pleases with its availability.

But how to choose a suitable profiled sheet for a roof with a certain angle of inclination and operational features? What should be the height of the corrugation, do you need special grooves and which coating should you give preference to? We will now answer these questions for you.

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

Durability.
Price.
Low weight.
Versatility of application - both as a roof covering and as a basis for insulation of a flat roof.
Easy installation.
Rigid and fixed joint to the roof sheathing.
Resistance to weathering and mechanical stress.
Rich colors.

Modern profiled sheets cover both industrial and industrial buildings of a huge area, as well as residential buildings with a wide variety of roof types - flat, semicircular, stepped and complex shapes.

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

Selection according to the stiffness and height of the corrugation

So which profiled sheet is more suitable for the roof? In this issue, we suggest you understand in more detail, since experienced builders, for example, are sure that even the most ordinary profiled sheet, with proper installation, will serve faithfully for a long time. But you want durability and ease of maintenance, don't you?

Wave height and leakage

It is a well-known fact that the higher the wave, the stronger the leaf, and the less chance of water overflow through the wave. What does it do? The fact is that such "waves against rocks", when water pours into another bend, significantly increase the water pressure on the holes from the screws. Naturally, the risk of leaks in this case is much greater.

Rib stiffness and loads

Sheets with a low profile height are least suitable for roofing as they are not rigid enough. In order to withstand the load of snow in winter and the heaviness of a person's legs during the repair process, the profiled sheet for the roof must have an edge of at least 20 mm. Of course, if you are building a house in a southern country, where there is almost no snow, almost any type of corrugated board is suitable for you. Therefore, do not trust the spectacular photographs of houses with almost flat corrugated board - there is no snow in such parts, otherwise it would bend the roof in the first snowfall. And this is not for Russian latitudes anyway.

So, the higher the edges of the profiled sheet and the greater their number per meter, the stiffer the profile, and the more it can take on the additional load. The most reliable in this regard can be called professional flooring brands N-60, N-75, N-114 and Euro-profiles N-153, N-158.

Roof profile views

Let's look first of all with the marking of modern professional sheets:

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

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

С20К with a thickness of 0.4-0.7 mm.
НС35 with a thickness of 0.55-0.8 mm.
НС44 with a thickness of 0.6-0.9 mm.
Н57 with a thickness of 0.6-0.9 mm.
Н60 with a thickness of 0.6-0.9 mm.
H75 with a thickness of 0.6-0.9 mm.
Н114 with a thickness of 0.7-0.9 mm.
Any professional sheet with MP marking.

And now about each - in more detail.

Profile С-20: a budget solution

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

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

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

The main advantage is, of course, the price.

Professional sheet C21: outbuildings and a garage

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

An excellent subspecies is the C20K profiled sheet, which has an additional groove for water drainage.

Professional sheet C35: for central regions

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

Profiled sheet НС 35 is produced by the method of cold profiling. The uniqueness of this type of corrugated board is its economy, which is combined with excellent performance. Excellent resistance to weathering, mechanical strength and still relatively low weight. And what is most valuable, such a professional sheet is best suited for regions where there is little snow, but the winds are strong. Due to the low specific weight, it is no longer easy to tear off such a roof - not the same windage.

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

Looking for something durable yet pliable to cut and assemble? Then this is the most suitable professional sheet.

Professional sheet NS 44: protection against hail

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

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

Professional sheet NS 57: for snowy areas

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

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

Is Siberia within easy reach? Then cover the roof with these profiled sheets, and you will be calm.

Profile Н-60: high quality

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

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

Profile Н-75: for flat roofs with load

Profile Н-75 is intended for arranging load-bearing structures, floors, pitched and flat roofs. It already has a greater thickness - 0.7-1.0 mm, and its mass ranges from 9.25 to 12.9 kg per 1 m 2.

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

Profile Н-107: maximum strength for a pitched roof

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

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

Profile Н-135: for inverted roofs

The H-135 profile has great rigidity and is used for arranging flat inverted roofs - the kind on which a summer cafe and even a parking lot are built. That is, we are talking about serious loads!

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

Profile Н-158: for extreme conditions

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

Such a profile is, of course, the apogee of strength and endurance. Why not take one right away, even if you have the simplest pitched roof? But the price! This is just an unjustified investment. And, instead of overpaying for excess strength and durability, better invest these funds in purchasing a more suitable profile, but with a good, high-quality coating that will protect it from any hail.

Coverage selection

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

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

Matt and glossy polyester, which gives the coating even greater strength and reliability, resistance to fading and cracking. It is a glossy polyester paint with a wide choice of colors and relatively cheap prices.
Polyurethane, which will protect the metal coating from frost.
Polyvinylidene fluoride.
Plastisol is polyvinyl chloride with plasticizers that are resistant to almost any mechanical, temperature and chemical attack, and also perfectly imitate the texture of wood and leather.
Zinc is cheap and cheerful, though not at all durable.
Aluzinc is a coating that includes 1.6% silicon and 55% aluminum. The result is excellent protection against scratches and paint tarnishing over time.
Matt Polyester - A combination of polyester with Teflon to create a more wear-resistant coating.
Pural is a polyurethane-polyamide paint with a pleasant matte-silky texture, which gives the corrugated board a lifespan of up to 50 years without fading and loss of other qualities.
PVDF is a polyvinyl difluoride acrylic paint that offers excellent protection against chemical and ultraviolet exposure, which is important for regions with serious environmental pollution.

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

The professional sheet marked "A" is covered with aluminum.
Steel sheets marked "AK" are coated with an aluminum-silicon coating.
Sheets marked "AC" have a less durable aluzinc coating, in which only 4% aluminum.
The "EOTsP" marking means that the sheet has been hot coated on both sides.

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

Quality selection

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

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

Sheet thickness. The thinnest products are of unambiguously dubious origin. Note that it is difficult to visually determine handicraft production, and even with a micrometer it will be possible to measure the thickness of the sheet together with the coating. So, for the roof, it is desirable that the thickness should be 1.15 mm, zinc should be from 140 grams per square meter. What to do? Contact only approved dealers or directly to the manufacturer.
The quality of the raw materials used. So, for example, the Russian manufacturer Metalloprofil produces profiles from metal of different origins - Cherepovskiy, Novolipovskiy, Korusovskiy and others. All this feedstock has a different degree of zincating, but within the limits of GOST. And you can require a quality certificate. And from what the nameless profile, which the market is flooded with, is made of is a difficult question.
The inner side of the sheet. There should be no streaks on it - only a uniform pure color throughout the entire mass of the leaf. Coverage is very important! You do not want the first hail to completely ruin the appearance of the roof?
Package. If the sheets are simply folded on a regular block and wrapped by hand with film, this is not quality. When you bring (or they will bring you) such building material, you will find not sickly scratches due to improper protection, and in the end you will reject at least a sheet from each package.
Meeting the required criteria. We have already told you how to choose a specific profile for your needs - and this is what you should be guided by. And in any case, do not trust unscrupulous sellers who will try to convince you to take a worse profile (after all, your neighbors supposedly bought the same one, and nothing). The wrong choice is also a bad profile!

Success in your purchase and successful installation!