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Galvanized profiled sheet thickness how to determine the inside. Pitfalls in the construction of a fence from corrugated board. What thickness to choose a profiled sheet for the fence

When preparing a series of articles dedicated to modern building materials, we could not deprive the attention of corrugated board as an extremely popular facing wall or roofing metal sheet. Despite the deceptive simplicity, with regards to the characteristics and features of a profiled sheet, many questions arise even among those who work with it professionally. Let's finally take a closer look at the brainchild of the English engineer Henry Palmer, who is credited with the invention of the profiled sheet back in 1820.

Kinds. What is it made of and where is it used?

The profiled sheet is made from rolled sheet steel with different corrugation heights, thickness, width and length of the sheet. Profiling of the steel base provides rigidity to the profiled sheet without increasing the weight, and galvanic treatment - an attractive appearance and protection against corrosion.

Structure. Find out what's inside

The profiled sheet, like all composite materials, in the context is a puff cake. At the base is a steel sheet that can be coated with:

Galvanization

Density of drawing 275 gr/sq.m. Thickness from 90 µm according to DIN EN 10143. Guarantee for galvanizing 5 years. Service life - up to 20 years.

Aluzinc coating

Corrosion resistance is 2 times higher than that of standard galvanized steel. It has a 10 year warranty. The estimated service life is up to 30 years.

Polymer coatings

Warranty 10 to 20 years. The service life declared by the manufacturer reaches 50 years

Sample sheet structure:

Marking. Learning to read characters correctly

Designation of corrugated board (for example, С25-0.60-700-11 000) contains all the information on its main characteristics.

The letter indicates the scope:

H- bearing, roofing sheet.

WITH- wall for walls and fences.

NS- load-bearing wall material of universal application.

The figure is the height of the profile in millimeters.

Next is the thickness of the metal, which was used to stamp the sheet, in mm. GOST 24045-2010 this product is thin galvanized steel GOST 14918.

The third means the mounting width of the profiled sheet, mm.

Decryption examples

Example 1: C 21-1000-0.7

C - wall profiled sheet with a profile trapezoid height of 21 mm, a working width of 1000 mm and a metal thickness of the initial workpiece from galvanized steel coils of 0.7 mm

Example 2: C 21-0.55-750-12000

C - for wall railings with a profile trapezoid height of 21 mm, made of metal 0.55 mm, with dimensions: 750 x 12000 mm

Today, you can still find markings in accordance with the previous GOST (more on regulatory documents below). In the obsolete standard, coated sheets contained additional designations:

aluminum zinc ( AC);

aluminized and aluminosilicon ( A and AK);

electrolytic zinc ( EOCP).

Application

Profiled sheet is used for:

Roof erection;

Installation of ceilings (including steel-reinforced concrete);

Construction of wall fences.

Table. Scope of some common types

Facing works Roofing works Installation of load-bearing structures Installation of permanent formwork Installation of fences + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +

Profile marking	Where is used
C8
MP18 (type A)
MP18 (type B)
MP20 (A, B)
MP20 (R)
C21 (type A)
C21 (type B)
HC35 (A)
HC35 (B)
MP35 (A)
MP35 (B)
MP40 (A)
C44 (A)
C44 (B)
H60 (A)
H60 (B)
H75 (A, B)
H114 (A, B)

Current GOST

The current regulatory document for steel profiles is GOST 24045. Over time, changes are made to the standards and there are the following common versions of this document:

GOST 24045-86, status: replaced;

GOST 24045-94, status: replaced;

GOST 24045-2010, status: valid.

According to the material of the initial workpiece, steel profiles according to GOST 24045-2010 have one category: thin-sheet galvanized steel according to GOST 14918.

According to the previous version of GOST, the galvanized sheet contained the following number of subcategories:

sheets of galvanized steel GOST 14918;

rolled sheets with aluminium-zinc coating (designated as АЦ) according to TU 14-11-247-88;

sheets of aluminized rolled products and rolled products with aluminosilicon coating (denoted A and AK) according to TU 14-11-236-88;

rolled sheets with electrolytic zinc coating (designation EOCP) according to TU 14-1-4695-89.

The main dimensions of the metal profile

For roofing

For a roof type, the wave height is 2 and more cm. Moreover, the profile can be of complex shape, which provides additional rigidity to the product.

According to sales statistics of construction hypermarkets, the choice of the consumer is C 44 And H57 750. The latter was taken as a basis in GOST 24045-94 when calculating the bearing capacity of the roof.

The length of the sheets can be any. Roofing material brand H57 the width is 75 cm, H60 - 84.5 cm, H75 - 85 cm. For load-bearing and roofing sheets, the corrugation height is 3.5 - 4.4 cm. Product thickness brand "N" is equal to 0.6 - 0.9 mm.

For fence

As can be seen from the table above, almost every type is suitable for the installation of fences and the key selection criterion is usually the economic considerations of the owner.

The fence type has a small ridge height and thickness. Sheet C10 equal in width 90 - 100 cm, C18, C21 and C44 - 100 cm. For wall finishing sheets, the width is from 1.3 cm. Then the height of the corrugation of each subsequent type will increase by 3.25±0.25mm. Grade "C" sheet is the lightest and thinnest - 0.5 - 0.7 mm.

How much does it weigh

The type of sheet greatly affects its weight. With the growth of the “wave” of the profile and the thickness of the sheet, the mass increases. Weight is the main advantage of this product. On average it 1 m2 weighs 7 - 11kg. If this area is covered with tiles, then it will be needed 43 kg. Weight 1 m2 stamp sheet "WITH" equals 5.5 - 7.5 kg.

There are special tables in which, as a function of the brand, thickness and width of the sheet, the mass is shown 1p. m.. or 1 m2 material. To calculate the weight of the flooring, you can also use one of the weight calculators that can be easily found on the Internet.

Patterns and texture of decorative profiled sheet

The drawing on the sheet is printed on a polymer material and sintered with the metal under the influence of temperature, forming a shell that protects the metal and the image.

Drawings are panoramic and solid. Such material is used, in addition to fences, for finishing the basement or the entire building (profiled sheet under stone, wood, brick, etc.).

An example of a decorative wood effect

An example of a decorative stone effect

An example of a decorative coating under a brick

New technologies protect images from fading in the sun and the environment. According to the manufacturers, the pattern will not fade 15 years.

Coloring of profiled sheet

Of course, works of art like this delight the eye and awaken a sense of beauty, but the cold mind mercilessly attacks the song's throat and demands to resolve the issue in the style of Tom Sawyer, and most likely "already yesterday".

Like other leaf parameters, its color is normalized. The most famous color standard is the scale RAL.

Today it includes 213 colors and each has a 4-digit numeric code. This makes it easier to match the color of products regardless of the manufacturer.

In a profiled sheet, usually only the front side is painted. But under the order they are also produced with double-sided coloring.

Colors according to RAL scale

The photo shows an example of painting a fence according to colors according to the RAL scale

It is very convenient to order the material of the desired color without a visit to the construction base. We poke a finger in the color we like, call the manager and call the unique code from the table. Then it remains only to meet the Gazelle with the material on its site.

What you need to know if you do it yourself

How to cut

The material is perfectly cut with ordinary metal scissors, electric or manual jigsaw, hacksaw, grinder.

Hole Punch Tool

You can always make something with a hammer and improvised devices. But the one who at least once held a specialized tool in his hands is unlikely to refuse it. To your attention special pliers punching holes Ø 10.5 mm in sheet thickness up to 1.2 mm under brackets for ventilation, drainage, etc.

This easy-to-use tool facilitates installation thanks to its wide opening and adjustable gripping depth. Usually pliers have a set of interchangeable punches.

Profiled sheet seals

They are made of wood-polymer composite, polyethylene foam and polyurethane foam. They copy the wave of the sheet and prevent moisture, dust and insects from getting into the cracks.

Since the sealant has a porous structure, it does not interfere with air circulation and the removal of moisture from under the roof, as well as the settling of condensate from the bottom of the coating.

Seals are distinguished:

self-adhesive universal (soft) - suitable for all types of products with a wave up to 20 mm;

special views used for this type of sheet.

What is the best way to mount?

self-tapping screws

To fasten the sheets to the crate, use a pneumatic or electric drill. Self-tapping screws are tightened observing the tightening torque. Their average consumption for the installation of flooring - 5 - 6 pcs/m2.

Rivets

As can be seen from the comparison picture, riveting with a construction gun looks more aesthetically pleasing.

The flooring is fastened with special rivets for these products, since the use of other rivets leads to poor-quality fastening and reduces the service life.

Rivet diameter ( 3.2 - 6.5 mm) is selected according to the thickness of the sheet. For the manufacture of this fastener is a special aluminum and galvanized steel.

For profiled sheet construction, where design is important, colored fasteners can be used.

Conclusion

The subject of our conversation covers a huge range of works that cannot be covered in one article. We have tried to provide useful links to related materials, in addition, articles are planned in the series of publications that will deeply reveal all the issues related to the use of a profiled sheet. We will be glad if you add the site to your bookmarks and come back to familiarize yourself with them.

In addition, we will be grateful for constructive criticism, suggestions and your questions, which you can ask at the contacts listed on the page >>>

Help us make the site better!

The metal coating of the roofs of private houses is becoming more and more popular, especially since the material is produced in various variations and, thanks to modern technologies, is constantly being upgraded. Therefore, many consumers have a fair question - which corrugated roof to choose? This one has excellent aesthetic and operational characteristics, it is able not only to reliably shelter the building from rain and wind, but also to transform its appearance.

Decking is produced in different colors, and can also have different thicknesses and configurations of sheets. Due to the fact that roofing sheets are given dimensions that allow you to completely cover the length of the roof slope, from the ridge to the overhang, they are much easier to mount on the truss system than, for example, the familiar traditional slate. In addition, the material is not too heavy, and thanks to special protective coatings and a polymer film applied on top, it will last a fairly long time.

High-quality corrugated board is increasingly preferred when choosing a material for roofing residential buildings, as it has a large number of positive qualities that other coatings cannot “boast”. These advantages include:

• The first thing that always worries many buyers is the price of the material. Precisely because corrugated board is available for almost any family, it is increasingly the choice when choosing a roofing material.
• The extensive color range of produced sheets allows you to choose exactly the shade of the coating that will be perfect for the harmonious design of the exterior of a private house.
• The corrugated board is produced in sheets up to twelve meters long, which allows, when mounting it on the roof, to make a minimum number of joints along the slope or even completely abandon the transverse joint.
• The small specific gravity of the material, the simplicity and clarity of installation allows you to do roofing work yourself with the involvement of just one assistant who will feed the sheets to the height of the roof.
• The consumer is given the opportunity to choose the height of the relief of the sheet - depending on the planned slope angle of the slope.
• In addition, it is possible to choose a finish coating of corrugated board with a different composition. The coating can be applied using different technologies, and, accordingly, differ in quality, service life and, of course, the cost of the material.
• Another important advantage of corrugated board is the environmental friendliness of the entire range of materials used in its production. Roofs made of corrugated board, regardless of the duration of operation, are not capable of harming the environment. It is also important that the material is non-combustible.

Classification of corrugated board

Nowadays, manufacturers offer various types of corrugated board, designed for specific areas of application in construction practice. However, some of the types, due to their qualities, can be considered almost universal and used for a variety of purposes.

To determine the choice of material that is well suited for roofing, it is necessary to consider all the main types of corrugated board, as they are very often interchangeable.

When considering a specific type of profiled sheet, you should pay attention to its marking - it consists of several numeric and alphabetic characters indicating its purpose and main parameters.

Letter designations in marking

The first letter in the marking determines the strength properties of the material and its main area of ​​application:

• "H" - these are the most durable profiled sheets. In this case, the letter "H" indicates that this is a bearing type of corrugated board. This material has the highest wave height (corrugations) with additional grooves in its lower part - they give the sheets increased rigidity.

In addition, the bearing corrugated board differs from other varieties in the largest thickness of the metal sheet. Therefore, it is used for residential buildings, the construction of walls and roofs of large hangars, fences, the manufacture of heavy containers, the construction of production workshops, warehouses, garages, gates and other structures that must have high mechanical strength, reliability, and durability.

• "NS" is a "bearing-wall" profile material, and it can be safely called almost universal, as it is used for a variety of purposes. This type of corrugated board is distinguished by an average level of metal thickness and wave height.

Such material is used for the construction and cladding of walls, for roofing, fences, sheds, other household, industrial and ancillary buildings are erected from it, gates and gates are made. According to its performance characteristics, this type of corrugated board can be called intermediate between the carrier and wall material, but its cost is much lower than that of the carrier.

• "C" - wall corrugated board. It is used for the construction of light outbuildings, wall cladding of residential buildings on top of the thermal insulation layer, for the manufacture of frame gates, fences and other structures.

Its wave height is low, therefore, the strength qualities for transverse bending are also small. For the manufacture of many models, the thinnest steel is used, and it is not surprising that the cost of such a material is also small.

However, many of the models of corrugated board of their category “C” are also quite suitable for roofing.

• "MP" is another common type of corrugated board, which is characterized by good versatility and is ideal for both roofs and walls of outbuildings, and besides, it is used in the production of sandwich panels. What each of its modifications is intended for can be found from the digital and letter markings.

Galvanized sheeting MP is used to cover pitched roofs, partitions in industrial premises, as well as for suspended ceilings. This type of material is produced not only in galvanized form, but also with a polymer coating.

"MP"-profiled sheet is produced in three variations - these are types "A", "B" and "R".

So, for example, "MP-R" corrugated board is designed specifically for roofing, and types "A" and "B" are more suitable for fences and wall cladding. Type "R" differs from "A" and "B" in the size of the corrugations, in particular, in that the base of the wave to it is smaller, and the distance between the waves is wider, while the opposite is true for wall sheets. This profile will make it easier for storm water to flow down.

In addition, thanks to these parameters, the roofing type "R" surpasses the wall profiled sheet in terms of bending strength, and is able to withstand high static loads. Types "A" and "B", in turn, better resist wind dynamic effects.

The wall types of this corrugated board differ from each other in that "A" is produced with a protective coating only on the front side, and the type "B" coating is specified at the time of order. Therefore, in the second variant, color layers may be completely absent, or they may be applied on one or both sides of the sheet.

Decking "MP" - the difference between wall ("A" and "B") and roofing "R") profile

Profiled "MP" is manufactured with a corrugation wave height of 18 or 20 mm.

Numerical designations in marking

So, in the product labeling, the letter designation is followed by numerical values ​​that provide the necessary information:

• The first number indicates the height of the wave in millimeters.
• The second digital value indicates the thickness of the sheet steel from which the corrugated board is made - this parameter is also given in millimeters.
• The third group of numbers gives information about the useful width of the sheet in millimeters, that is, taking into account the overlap of the waves when laying the coating. This parameter is always somewhat smaller than the actual dimensions of the sheets, which should be remembered, for example, when organizing the transportation or storage of material.
• The length of the sheet may not be indicated, since when ordering material for certain needs, it can be any, at the request of the customer and according to the capabilities of the manufacturer. However, often in the price lists, the limit value of the length is still given, also in millimeters. For example, the last group of numbers might be 12000.

Thus, the marking of corrugated board may look, for example, like this:

C10-0.5-1100- this suggests that the wall-type corrugated board, having a wave height of 10 mm, is made of a sheet 0.5 mm thick, with a useful width of 1100 mm.

Another marking example:

MP-18-0.7-1000V- this is a corrugated board with a wave height of 18 mm, made of steel sheet 0.7 mm thick, useful width 1000 mm, made of uncoated galvanized steel, but it can be applied at the request of the customer on one or both sides.

Sheet thickness, wave height, corrugated board weight

It is necessary to highlight the question of what the minimum and maximum thickness of the metal sheet from which the corrugated board is made can be, as well as what mass the sheets of roofing material can have - this is extremely important for the roof structure.

• The thickness of the metal sheet is:

- in varieties "H", "NS" and "C" can vary from 0.4 mm to 1.2 mm;

- "MP-R" - from 0.4 to 0.8 mm;

- "MP-A" and "MP-V" - about 0.4 to 0.7 mm.

The strength of the material, its resistance to the loads characteristic of the roof - wind and snow - directly depend on this parameter.

• It is necessary to choose the correct wave height of the corrugated board, since this parameter also determines the rigidity of the material and the reliability of its fit and fastening to the crate of the roofing system. Usually, corrugated board with a wave height of at least 18 mm and up to 60 ÷ 75 mm is used for roofing. True, the upper value cannot be considered the limit; higher material can be used, but the only question is the expediency of such an approach.

The height of the wave affects not only the strength of the material, but also the quality of water drainage from the roof during rain. Profiled sheets "NS" and "H", having grooves in the lower part of the wave, are more resistant to various loads, therefore, when choosing a roofing material, it is recommended to give preference to them.

We must not forget that in winter, accumulations of snow can form on the roof, which the coating must withstand. In addition, the roof must withstand the weight of a person, since it will have to be climbed more than once for various reasons.

The table below shows the main types of corrugated board with an indication of the characteristic areas of their application:

Type of corrugated board	Typical applications of the material
	Wall covering	Roofing	Bearing wall structures	Fixed formwork	fence construction
C8	˅	-	-	-	˅
MP18 (A)	-	˅	-	-	˅
MP18 (V)	˅	-	-	-	˅
MP20 (A, B)	˅	-	-	-	˅
MP20 (R)	-	˅	-	-	-
C21 (A)	-	˅	-	-	˅
C21 (B)	˅	-	-	-	˅
HC35 (A)	-	˅	-	-	˅
HC35 (B)	-	-	-	-	˅
MP35 (A)	˅	-	-	-	˅
MP35 (B)	-	˅	-	-	˅
MP40 (A)	˅	-	-	-	˅
C44 (A)	-	˅	-	-	˅
C44 (B)	˅	-	-	-	˅
H60 (A)	-	˅	-	-	˅
H60 (B)	-	-	˅	˅	˅
H75 (A, B)	-	-	˅	˅	˅
H114 (A, B)	-	-	˅	˅	-

The design of the crate created under the roofing also depends on the type of material and the height of the wave. Approximate values ​​for the step of the transverse crate are indicated in the following table:

Type of corrugated board	Roofing pitch
C8	For roofing it is better not to use. In exceptional cases - only with the use of a continuous crate
C10	For roofing it is better not to use. It is allowed to use with a lathing step of not more than 300 mm
S18 (MP18)	no more than 400 mm
MP20	400 - 500 mm
C21	350 - 600 mm, depending on the steepness of the roof slope
HC35	1200 - 1500 mm
C44	500 - 1000 mm, depending on the steepness of the roof slope
HC44	up to 2600 mm
H57	up to 3000 mm
H60	up to 3000 mm
H75	up to 4000 mm

corrugated board

• An important parameter, both for organizing the delivery of material to the construction site, and for assessing the possibility of performing roofing work manually, without the use of special lifting equipment, is the mass of sheets of corrugated board, which depends on the thickness of the metal, the configuration features of the profile and its coating. This parameter can vary significantly - in the range from 5.4 to 17.2 kg / m².

The table of weight parameters of the bearing "H" corrugated board is given below:

Profile marking	Thickness of a metal sheet, mm.		Weight of 1 m² of coating, kg
H57-750	0.7	6.5	8.67
H57-750	0.8	7.4	9.87
H60-845	0.7	7.4	8.76
H60-845	0.8	8.4	9.94
H60-845	0.9	9.3	11.01
H75-750	0.7	7.4	9.87
H75-750	0.8	8.4	11.2
H75-750	0.9	9.3	12.4
H114-600	0.8	8.4	14
H114-600	0.9	9.3	15.5
H114-600	1.0	10.3	17.17

And another table showing similar parameters, but for universal sheets of the "NS" type:

Profile marking	Thickness of metal sheet, mm	Weight of 1 linear meter of material, kg	Weight of 1 m² of coating, kg
NS35-1000	0.5	5.4	5.4
NS35-1000	0.55	5.9	5.9
NS35-1000	0.7	7.4	7.4
NS44-1000	0.5	5.4	5.4
NS44-1000	0.55	5.9	5.9
NS44-1000	0.7	7.4	7.4

What type of protective and decorative coating of corrugated board to choose?

The durability of the operation of the roofing material largely depends on what kind of coating is applied to it, and how high quality it is. Therefore, it is necessary to consider the main varieties of such coatings.

Galvanized corrugated board

Galvanized is made from cold-rolled steel with a zinc coating, sheet thickness 0.4 ÷ 1.3 mm.

• The first step is zinc coating of "black" steel - this layer is the main barrier in protecting the metal from corrosion.
• After galvanizing, the zinc layer is passivated, that is, it is covered with an oxide film, which also effectively prevents the development of corrosion.

• Further, the sheets enter the roll forming machine, where they are given a trapezoidal or wavy profile with a wave height of 8 to 180 mm, depending on the purpose of the corrugated board. The result is a finished sheet made in accordance with GOST. After that, the material can be sent for sale, or a protective polymer coating is applied to it.

Today it is possible to purchase roofing material coated with a modified anti-corrosion compound - aluminozinc or aluzinc, consisting of 43% zinc, 55% aluminum and 1.6% silicon. The corrugated board with such a coating does not differ much in price from the usual one, coated only with zinc, however, it has much greater resistance to various aggressive influences, and therefore is more durable.

Simple galvanized corrugated board is rarely used for - as a rule, it is used for garages and various outbuildings, since in these cases economy issues usually come to the fore, prevailing over decorative effect. For houses and cottages, material with protective polymer coatings is more often chosen.

Previously, many owners, when purchasing a galvanized profiled sheet, tried to apply coloring compositions to it on their own. Today there is no need for this - you can choose its color for every taste, depending on the general facade design of the house.

Decking with a protective and decorative polymer coating

Roofing material, protected by one of the high-quality polymer coatings, dramatically adds to the "longevity" - its service life is from 25 to 60 years or more.

Polymer coating technology

The polymer coating is designed to protect the roofing material from external natural, chemical and mechanical influences.

The maximum duration of operation is ensured by a protective coating consisting of several layers and applied using modern technological processes.

The performance of the corrugated board will directly depend on the method by which one of the polymer coatings is applied to the metal. Polymers can be applied in various ways, but the stages of such a process are approximately the same:

• Galvanized sheets are degreased and dried.
• Further, the metal is subjected to a priming process, which significantly increases the adhesion of the galvanized layer to the polymer.
• Then, a polymeric color coating is applied. Its thickness can vary from 25 to 200 microns. This layer is usually applied to the front side of the profiled sheet, and its lower side is often covered only with a layer of protective varnish.
• At the next stage, the sheets enter special chambers, where, under the influence of high temperatures, the processes of final polymerization and strengthening of the protective coating take place.

The most common method of applying a polymer layer is powder. The coloring process takes place in a special chamber. At this stage, a positive charge of a direct electric current is passed through the metal, after which a fine powder of a certain color is sprayed onto its surface, which is given a negative charge. Under the influence of the created electromagnetic field, the powder particles are attracted to the metal sheets. Then, the sheets enter the thermal chambers for the final polymerization of the coating.

This coating method contributes to the creation of a more resistant layer on the metal surface compared to liquid coloring. This is due to the fact that the coloring composition is very evenly distributed on the metal surface, which significantly reduces the risk of defective corrugated board.

Profiled sheets with a polymer-powder coating are highly resistant to all kinds of negative influences, so their service life is much longer than that of corrugated board coated with liquid compositions.

By the way, another fact speaks about the strength of the polymer coating.

galvanized corrugated board

Sheets after painting are usually immediately shipped to consumers - companies that are already engaged in the manufacture of corrugated board on the ground. Of course, shipping protective packaging is usually provided for this.

But already in the process of corrugated board production, the material is passed through the rolls of machines that form the desired profile, that is, the metal experiences considerable loads and internal stresses. However, a high-quality protective coating from such exposure is not damaged at all.

Varieties of polymer coatings

Since polymeric decorative and protective coatings can be different, it makes sense to consider their features. So, what are they, and what qualities do they have

So, the following polymer coatings can be applied to the roofing corrugated board: polyester, pural, matte polyester, PVDF and plastisol.

• Polyester

A profiled sheet with a similar coating has the most affordable price, so it has become the most popular material, both for roofing and for the construction of fences and gates. Polyester is resistant to ultraviolet rays, so it practically does not change its original color for many years. The material is resistant to corrosion processes and temperature extremes, but its disadvantage is the small thickness of the applied polyester, which is easily damaged by mechanical action - the same scratching.

Before buying this material, it is recommended to conduct an experiment to check the quality of the coating. To do this, you can try to bend the edge of the corrugated sheet - from such an impact, polyester should not be covered with cracks or small folds.

• Matte polyester

Matte polyester is slightly different in composition from the glossy version. Since the coating is rough, it scatters light and does not give glare. The technology is such that the composition is applied unevenly, so it is quite difficult to determine the exact thickness of the layer. But in any case, it turns out to be quite large, and such a coating significantly exceeds the glossy counterpart in terms of surface and anti-abrasive strength.

This quality of a covering allows to hope for longer term of operation of a roofing covering.

Quite often, it is with the use of matte polyester on the surface of corrugated board that they imitate textured patterns of stone, wood or brickwork.

• Pural

Pural is a protective multipolymer composite that is made from a polyurethane-based composition with the addition of polyamide and acrylic. It makes the roofing material more durable, serviceable for 50 years without losing its basic protective and decorative qualities.

Pural is applied with a thickness of 50 microns and has excellent adhesion to metal, so it is quite difficult to damage it, since it is resistant not only to mechanical stress, but also to chemicals, temperature extremes, and diverse external influences of a natural or man-made plan. Therefore, it is well suited for use in environments where metal is corrosive, such as high humidity or air pollution from industrial emissions.

Decking with a wear-resistant polymer coating - pural

The disadvantage of corrugated board with pural coating is its high price, which is several times higher than the cost of sheets protected with ordinary or matte polyester. Most often, a profiled sheet covered with pural is used specifically for roofing or facade decoration of residential buildings.

There are two options for the pural finish - smooth glossy and matte.

• Plastisol coating

Plastisol is made from polyvinyl chloride with the addition of plasticizers. It is applied with a layer of about 200 microns. Due to this thickness, this material is highly resistant to mechanical and chemical influences, as well as to some natural phenomena.

However, plastisol has a significant drawback - it does not respond well to elevated temperatures, so it is not recommended to use it in climatic zones with a hot summer climate. In addition, this protective coating is not resistant to ultraviolet rays, therefore, being under their influence, it quickly loses its original color. If corrugated board with this coating is purchased, then it is recommended to choose light colors, since they fade less in the sun under the influence of ultraviolet rays, and do not heat up so much.

Many choose corrugated board with this protective coating because it is produced with a relief surface that imitates the textured pattern of various natural materials, such as wood, stone cut or leather surface. Such a design usually has a matte surface that does not give glare, so the color seems deeper and richer, which gives the material a respectable appearance.

Plastisol-coated corrugated board is most often used in cold regions with an aggressive climate or in industrial areas, as well as where there is a high probability of mechanical damage to the roof from natural phenomena, for example, in areas where dust storms or hail often occur.

• PVDF coating

PVDF is also a composite coating, as it consists of 20% acrylic and 80% polyvinyl fluoride. Thanks to the complex of these materials, the metal is provided with the highest degree of protection against any kind of influences, including ultraviolet rays. Such corrugated board is used for finishing facades and roofing, as it retains its original appearance for 45–50 years. Metal sheet coated with PVDF can be used in areas with any climate, regardless of environmental conditions, as it is inert to industrial air pollution, as well as to humid, including "salty" maritime climate.

As is clear from the presentation, all types of coatings mentioned above are capable of performing the functions of protecting the metal sheet, but to varying degrees. The table below allows you to more clearly compare the qualities of protective and decorative coatings, so that it is easier for the consumer to make a choice:

Coating Properties	Polyester	Matte polyester	Pural	Plastisol (PVC)	PVDF (PVDF)
Nominal coating thickness, µm.	25	35	50	200	27
The thickness of the polymer coating of the metal, microns	19	23	30	192	20
Primer thickness, microns	6	12	20	8	7
Maximum operating temperature, °С	90	90	100	70	110
Surface	Smooth	embossed	Smooth	embossed	Smooth
Service life, years	20-30	30-40	40-50	30-50	30-40
Compositions of polymer coatings	Polyester	Polyester	Polyurethane, polyamide and acrylic	Polyvinyl chloride and various plasticizers	Polyvinyl fluoride - 80%, acrylic - 20%
The table below shows comparative estimates of the resistance of coatings to various influences (ratings are indicated on a 5-point system). The scores are based on the results of testing in the laboratories of manufacturing companies of such material.
UV resistance	3	3	4	1	5
Mechanical resistance	2	3	4	5	3
Chemical resistance	2	3	4	4	5
Resistant to aggressive climatic conditions	3	4	5	5	4

The main criteria for choosing corrugated board

As a generalization of all of the above, it makes sense to highlight the points that you need to pay special attention to when choosing a corrugated board for arranging the roof of your home.

sheeting with protective coating

• The material must be marked "H", "NS" or "MP-R", and if it is selected for a residential building, then an average sheet thickness of 0.5 ÷ 0.8 mm will be sufficient.
• It is recommended to purchase roofing material with a powder coating. The polymer with which the coating is made is chosen independently, taking into account the features that were emphasized above, taking into account the climatic and other conditions of the region or even a specific locality.
• Particular attention should be paid to the quality of the corrugated board coating:

- the surface of the roofing sheets must be smooth, without dents and scratches;

- the edges of the sheets should have even cuts, without burrs;

- the protective colored polymer layer must be uniform, without chips and sagging;

- when the profiled sheet is bent, its coating should not crack, break or gather in folds, and the sheet itself should easily take its original shape when unbent.

• In addition, you should pay attention to the warranty provided by the manufacturer. For example, a certificate may indicate a service life of corrugated board of 30 years or more, and a guarantee is given for only a year or even completely absent - in this case, it is recommended to refuse to purchase such products.
• If such an opportunity is given, then the best option is to purchase corrugated board directly from its manufacturer or from authorized dealers - this moment will significantly reduce the likelihood of purchasing low-quality material.
• In addition, it is worth considering the reputation of the manufacturer and seller. You should not purchase corrugated roofing in a small store on the construction market, since in this case the risk of running into the products of an unscrupulous manufacturer is quite high.
• According to the rating of manufacturers, several domestic and foreign companies can be distinguished that have earned positive reviews - these are Russian enterprises that produce high-quality sheet steel, such as Novolipetsk NLMK, Severstal and Magnitogorsk MMK, as well as European manufacturers of roofing materials that represent its products on the Russian market - RUUKKI, Thyssen Krupp, Arcelor, Galvex.

When choosing corrugated board, it must be remembered that roofing is a rather laborious and expensive process, and they are usually carried out once every few decades. Therefore, it will be very unpleasant if you have to do this again and spend a lot of money in a year or two due to poor-quality corrugated flooring, which can crack and peel off under the influence of natural or other factors.

At the end of the article - an informative video about the types of corrugated board and its installation as a roofing:

Video: corrugated board - an excellent solution for roofing a house

Over many years of work, we have come across the fact that products (metal tiles, corrugated board) are sold by some factories with characteristics worse than those declared. Copies of quality certificates with metal characteristics are forged or hidden. The sites contain information about metal thicknesses of 0.5 mm and galvanizing of 275 g/m2, and this does not correspond to reality.

Having studied the regulatory framework, purchased the necessary laboratory equipment, now we check our suppliers and are calm about the level of quality of the metal we sell.

Ordinary factory managers are not aware of the machinations of the management and eloquently prove the ideality of their product. Even if they suspect that their goods are "not very" - they have no choice, because. praise should only their products. It is easier for us, we instantly change the supplier if we suspect something is wrong. We can safely call white - white, and black - black.

Sheet thickness

Sheet thickness according to the most popular positions of metals in the Crimea.

Type of metal	Claimed thickness (mm.)	Fact (mm.)
Galvanization (offer1)	0,45	0,412
Galvanization (offer2)	0,45	0,464
Galvanization (offer1)	0,5	0,467
Galvanization (offer2)	0,5	0,496
Galvanization (offer2)	0,65	0,631
Polyester (offer1)	0,45	0,431
Polyester (offer2)	0,45	0,471
	0,45	0,442
	0,45	0,467
Polyester Matte (offer1)	0,5	0,493
Polyester Matte (offer2)	0,5	0,541
Purex RUUKKI	0,5	0,534
Pural RUUKKI	0,5	0,568
Pural Matte RUUKKI	0,5	0,572
VikingMP 35µm (matte)	0,45	0,465
VikingMP 35µm (matte)	0,5	0,503
PURETAN 35µm	0,5	0,521
Colorcoat Prisma 50µm	0,5	0,533
Velur	0,5	0,531
Atlas	0,5	0,501
Quarzit lite	0,5	0,583
Quartz	0,5	0,541
Quarzit Matt	0,5	0,547

Measurements were made at a temperature of 18-22 ºС with a digital micrometer. The division price is 0.001 mm. Permissible error limit ± 0.002mm. Degree of protection IP54. Included in the State Register of the Russian Federation under the number 56549-14.

Legal side of the issue

. PROFILED METAL ROOFING SHEETS (METAL TILE)
According to the document, the metal tile is supposed to be 0.5 mm thick. By the way, this National Standard, for the first time in the history of Russia, appeared and entered into force only on March 01, 2019.

HOT-GALVANIZED SHEETS.
This normative document allows deviations in sheet thickness - the so-called "minus" or "plus" tolerance. For the thickness range of 0.4mm-0.6mm, the normal accuracy tolerance (B) is +/- 0.08mm. This means that if you buy galvanized corrugated board with a thickness of 0.5 mm, then it may be in the range of 0.42 - 0.58 mm. If these limit values ​​are not violated, then any of your claims will be rejected, even by the court.

Modern Russian and European factories make it possible to produce rolled products with a much smaller error. Legal admission enjoy "rotten" sellers. They order all raw materials with a small "minus" tolerance so that it costs less, and they produce metal tiles and corrugated board from it.

Thickness of protective coatings.

The central part of the sheet is the ferrous metal. It's called "tack". Its thickness can be quickly and accurately determined by subtracting the sum of the thicknesses of all protective layers from the total thickness of the sheet.

Steel sheet is a ferrous metal that rusts very quickly. This is already happening on the factory floor.

The best way to protect metal from corrosion is to coat it with another metal: zinc (Zn). Modern technologies make it possible to apply zinc coating thickness from 60 to 600 g/m². The more zinc, the higher the cost of production, the more durable the metal tile will turn out, the more expensive it will cost, the more difficult it will be to sell.

The zinc coating thickness parameters are standardized. It used to be:

• increased class "P": 40-60 microns (570-875g / m²)
• 1st grade: 18-40µm (258-570g/m²)
• Grade 2: 10-18µm (142.5-258g/m²)

Now the coating class is prescribed from the amount of zinc coating. There can be no other values.
Table GOST R 52246-2004 HOT-GALVANIZED SHEETS. Specifications.

🙂 you can confuse most managers with this question: "Tell me, is galvanizing 275gr/m² on each side of the metal or in total on two ...?"

The correct answer comes from a laboratory method for determining the amount of zinc on a sheet of metal. It looks like this. A sample of 1m² of galvanized sheet is taken. Weighed in. Next, the zinc coating is washed off with an alkaline solution from all sides of the test specimen. Now the sheet without zinc coating is weighed. The difference (in grams) is the amount of zinc in total from all sides test sheet.

The correct answer is 275gr/m², which is the amount of zinc on both sides of the sheet of metal.

However, the zinc coating itself is also susceptible to corrosion. Usually these are white efflorescences.

For short-term protection against zinc corrosion, a passivation process is performed. Passivation of metals is the transition of the metal surface to an inactive, passive state associated with the formation of thin surface layers of compounds that prevent corrosion. By the way, an ordinary galvanized bucket is also passivated.

Passivation of galvanized products is carried out in solutions of oxidizing agents by dipping into the solution for 5 - 30 seconds. The thickness of the seeding layer is equal to the thickness of several layers of molecules. The passivation layer does not affect the overall thickness of the sheet.

And yet, without passivation it is impossible to paint the surface of zinc. Therefore, this is not a specially designed protective attribute, but rather a technological necessity before applying a primer and painting.

The process of applying a primer and a colored protective polymer coating is a simultaneous sequential process taking place in the same workshop.

The normalized thickness of the soil is 5-7 microns.

Recall 0.5mm=500µm (micron).

The thickness and chemical composition of colored protective polymer coatings varies. This is the know-how of a specific manufacturer. The assessment of the thickness of protective polymer coatings according to GOST R 52146-2003 is carried out by the total measurement of the primer and the polymer protective layer. For this, the magnetic induction method for determining the thickness is used. The same device can determine the thickness of the zinc coating on the metal (ferromagnetic) since. zinc is diamagnetic.

Why are we doing this kind of research?

Imagine that a bricklayer was brought to the construction site and asked to lay out a wall. He is a good bricklayer, an excellent specialist. From this brick, he can lay out a wall with a thickness of 12 cm and 25 cm and 1.0 meters and as much as he likes. Whatever we ask, he will do to us.

The modern level of metallurgical production allows us to fulfill any orders for consumers of our products. What the consumer asks, the plant will do. The plant is good. The same plant can make metal to produce both very good and very bad metal tiles. "Who pays - he orders the music."

The purpose of our measurements – control suppliers, competitors, monitor the market. To identify those who work "in positive tolerance", and who are "in negative". Based on available data, honestly offer services to our clients dividing the range of metal tiles into quality categories:

• BEST: complies with European standards, the characteristics correspond to the declared ones, exceeding the requirements of state regulatory documents of the Russian Federation
• EXCELLENT: corresponds to the declared characteristics and requirements of the RF standards with the minimum possible deviations.
• GOOD: corresponds to the declared characteristics.
• NORMAL: corresponds to the declared characteristics and GOST R

We made measurements in total of all protective layers of metal on the front side of the rolled products.

Protective layer thickness = zinc thickness + primer thickness + color polymer layer thickness.

Type of metal	Claimed thickness (mm.)	Fact. protective layer (µm)	Note
Galvanization (offer1)	0,45	6 µm	acc. Zn 100gr/m 2
Galvanization (offer2)	0,45	10 µm	corresponding to Zn 140gr/m2
Galvanization (offer1)	0,5	6 µm	acc. Zn 100gr/m 2
Galvanization (offer2)	0,5	8 µm	corresponding to Zn 120gr/m2
Galvanization (offer1)	0,65	5 µm	acc. Zn 100gr/m 2
Polyester (offer1)	0,45	36 µm
Polyester (offer2)	0,45	42 µm
Polyester Matte (offer1)	0,45	39 µm
Polyester Matte (offer2)	0,45	48 µm
Polyester Matte (offer1)	0,5	59 µm
Polyester Matte (offer2)	0,5	62 µm
Purex RUUKKI	0,5	52 µm
Pural RUUKKI	0,5	82 µm
Pural Matte RUUKKI	0,5	85 µm
VikingMP 35µm (matte)	0,45	46 µm
VikingMP 35µm (matte)	0,5	46 µm
PURETAN 35µm	0,5	55 µm
Colorcoat Prisma 50µm	0,5	71 µm
Velur	0,5	63 µm
Atlas	0,5	57 µm
Quarzit lite	0,5	54 µm
Quartz	0,5	89 µm
Quarzit Matt	0,5	92 µm

Measurements were made at a temperature of 18-22 ºС at a relative humidity of 48-53% using a device for measuring geometric parameters and an induction transducer. Permissible error limit ±(0.015h+0.001)mm. The meter is included in the State Register of the Russian Federation under the number 18106-13.

In the accompanying documents for metal, the thickness of the metal is never indicated. Everywhere only the thickness of the sheet is given. If the sales manager proves otherwise to you, it means that he has never seen (or seen but did not understand) a metal quality certificate.

An example of a quality certificate for the supply of a batch of metal (commercial information is hidden)

for a batch of 0.5 metal with the correct amount of zinc

for a batch of 0.45 metal

foreign metal

imported metal

Now you have a lot of useful knowledge. I wish you the right decisions and successful purchases.

With respect, to your curiosity and insight

LLC "COMPANY GROSSA"

nlmk

severstal

tatastil

magnitogorsk

steel velvet

polyester

matte polyester

prism

puretan

pural

purex

velours

information refers only to those samples on which measurements were made.

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tags:

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what kind of polymer-coated metal is actually sold by factories

hidden forms of deception of buyers of metal tiles

how to check the thickness of zinc on metal tiles and corrugated board

measurements of zinc coating on metal

the actual thickness of the protective layers of metal tiles

what metal is better to choose for a roof

thickest metal roof tiles

permitted and permissible thickness of steel metal for roofing

testing of products of corrugated board and metal tiles of the corrugated board plant (Simferopol) test

testing of products of corrugated board and metal tiles of the Stroypartner plant (Simferopol) test

testing of products of corrugated board and metal tiles of the Intersteel plant (Simferopol) test

testing of products of corrugated board and metal tiles of the Rudex plant (Simferopol) test

testing products of corrugated board and metal tiles of the Rodnichok plant (Simferopol) test

testing of products of corrugated board and metal tiles of the Krym-roof plant in Trudovoye (Simferopol) test

testing products of corrugated board and metal tiles from the Ruukki plant

Pural Ruuki Metal Check

Ruukki purex metal inspection

Pitfalls in the construction of a fence from corrugated board.

So, you need to enclose a section of your country house or cottage with a fence made of corrugated board.

Having found construction companies on the Internet at the request “corrugated fence”, you call several of them in order to understand the cost of your fence. You are quite satisfied with this price and you agree on the arrival of a measurer to conclude a contract for the construction of a fence.

But this is where things get interesting.

For this price, a fence with a length of at least 100 meters will be built for you on a site without visible differences in height. In this case, the materials will be the most budgetary: pipes for poles of minimum thickness, corrugated board, most likely grade C8 made of Chinese steel with a thickness of even less than 0.4 mm. and so on. The support poles for fixing the longitudinal logs of the fence are most likely simply driven into the ground by 1-1.2 meters. If you are given inexpensive gates and a gate, they will also be made from the most budgetary materials. In practice, such gates can sometimes be bent simply by pressing a hand.

Now you are familiar with the little tricks of corrugated fence builders. Before ordering the cheapest fence, try to find out the construction technology and the quality of the materials used.

The corrugated board for the roof is made on bending equipment by cold rolling. It's not entirely clear what it's about? Are you buying building materials for the first time? Then it is important to know some of the nuances of choice and be able to check the quality of products, despite the excellent performance in the documents. Sometimes this is not true enough. In order not to buy a fake or marriage, follow our simple tips.

All the senses help us

At the moment, in almost every region of our country there are many manufacturers of corrugated board. The first thing to ask the consultant is about the raw materials used for building materials and the country that produces it. The high quality of steel produced by Russian metallurgists has already been recognized abroad. Therefore, it's time to stop scolding our manufacturers and overpaying for imported analogues of the same quality. And be wary of raw steel of Chinese origin. They are lower in terms of production, so the purchase of such a profiled sheet is already at your discretion.

Strength test

Press down on the sheet with your hand or bend it slightly. The corrugated wave on the surface must return to its position. If this happens slowly, then during operation the roof may be deformed.

Quality is determined by ear

By tapping on the profiled sheet, you will hear a certain sound. What should it be? Sound and clean! Any rattling indicates the quality of the steel used.

We peer thoroughly

Polymer-coated corrugated board is much more durable than a galvanized counterpart. But if it is applied in accordance with all the rules and there are no defects on the surface. It is impossible to hide them - these are scuffs or uneven coloring. In this state of affairs, it is worth buying a profiled sheet elsewhere. Run your hand over the material, absolutely smooth, hands do not feel rough? Then it's all right. Good quality polymer paint creates an even layer and is resistant to weather during operation.

The method of manufacture makes itself felt

If you saw water stains on the surface of the profiled sheet, then consultants sometimes pass them off as a design originality. In fact, this means that an emulsion was used in the manufacture. Such sheets are more likely to corrode, rust begins to appear on them very early.

Buy high-quality building materials, build your houses, live happily ever after!