How much does a metal tile roof come out on average. Installation of a roof from a metal tile. Direction and layout of roofing sheets

What is a metal tile? This is a sheet roofing material made of galvanized steel, which accurately imitates ordinary tiles. A metal-tiled roof looks elegant and imposing, while installation is carried out with minimal effort and financial costs. Due to these features, the material is very popular in Europe, Russia and the CIS countries.

However, the range of metal tiles is quite diverse, so it can be difficult to choose the optimal type of roof. Consider the main characteristics and requirements for this material in order to know how to choose it correctly.

What's inside? The composition and structure of the roofing sheet

The metal tile has a multilayer structure. As a basis, a sheet of metal made using cold-rolled technology is usually taken. Then the finished profile is subjected to step processing. In particular:

A layer of phosphate is applied to prevent corrosion.

Priming is carried out in order to increase the adhesion of the metal with the finish coating.

A polymer coating is applied to the front surface, of various colors.

The back side of the sheet is treated with a protective varnish.

As a result, metal tiles have the same composition, regardless of the manufacturer, however, roofing characteristics and quality may vary.

About composite tiles, a close relative of the subject of our conversation

What is a metal tile. Available types of roofing material

Profile views

All metal tiles available on the market differ in the type of profile that gives the roof a unique pattern. The following options are in high demand on the Russian construction market:

"Monterrey"

This is a rigid profile that accurately imitates ceramic tiles. Profiles of this type are characterized by a length 1 100 mm, 6 waves step by step 350 millimeters. The height of the profiling can increase or decrease, affecting the rigidity of the structure. The use of such metal tiles gives the building a classic look of modern architecture.

"Cascade"

It is characterized by strict geometry and rectangular shapes. If you order a metal tile of this profile in brown, the roof will resemble a chocolate bar. The width of these sheets is 1 120 millimeters, structure - 5 waves on 224 mm, step height: 22.5mm. The advantages of the profile are the minimum number of joints, which saves material. Due to its strict forms, the profile is suitable for residential and commercial buildings.

"Joker"

The profile of the metal tile resembles the popular "Monterrey", with a more "lush" geometry. With standard sheet sizes, the wave height is 49 mm, respectively, in conditions of low-rise construction, a roof made of such a profile will look more attractive.

"Athena"

A rather original profile, where the wave-like structure alternates with a flat base. Such a metal tile organically fits into any architectural style, therefore it is often used for the reconstruction of buildings.

In addition to the usual varieties of metal tiles, new models with original patterns appear on the market. For example: "Bongo", "Andalusia", "Shanghai". Sheets attract attention with a relief pattern (wave height up to 66 mm) and Z-shaped locking connections, which ensures installation without the use of external fasteners.

Types of metal profiles from Finnish colleagues

Materials of the basis of a metal tile sheet

Types of metal tiles on the market usually differ in the type of profile. However, this is not the only distinguishing feature. For manufacturing, a different base is used, which largely determines the characteristics of the roof. For example:

Steel. This is the most common type of metal tile in the domestic market. The base material is usually coated with a layer of zinc to increase the roof's durability and resistance to corrosion.

Aluminum. This profile is less common, but has a number of undeniable advantages. In particular, aluminum is neutral to any external influences, so it does not need additional processing. In addition, the material is quite light, which reduces the load on the foundation and supporting structures; installation does not require a strong crate. The disadvantages of aluminum metal tiles include a very meager palette of colors and high cost.

Copper. This is an initially expensive material that is rarely used in private construction. Copper metal tile looks impressive and pretentious, especially when covered with a greenish coating. The material does not require additional protection against corrosion, however, it is mainly used for the reconstruction of architectural and antiquity monuments.

It is worth noting that the most common and practical is the metal tile made of galvanized steel, which we will consider in the future.

Pros and cons to keep in mind

Like any building material, metal tile has its advantages and disadvantages. To strengths roofing can include the following points:

Durability. Without losing its properties and technical characteristics, a metal tile roof can last more than 50 years.

Resistant to temperature extremes. The range of application varies within -50/+70 degrees, which provides the possibility of application in any region of the country.

Diversity. Despite the identical manufacturing technology, the material boasts different shapes and colors.

High strength. The width of the sheet allows you to minimize the number of butt joints. In addition, the sheets are usually overlapped, which significantly increases the tightness of the roof.

Ease of installation. Metal tiles can be laid on the old roof, which significantly increases the speed of work. For example, a team of specialists can mount about 100 m2.

to essential shortcomings the following applies:

Restriction to the angles of the roof. In order for the metal tile to fully cope with its tasks, the slope angle must exceed 14 degrees.

Not suitable for roofs with complex geometries. During installation, you will have to adjust the wave and pattern, which increases the amount of production waste - up to 30% from the total.

Relief structure. The wave-like structure of the sheet can prevent the natural rolling of snow from the roof.

Low soundproofing. To solve the problem, an additional layer of insulation has to be laid.

Specifications

It should be noted that the metal tile is manufactured in accordance with the current GOST standards. This roofing material is characterized by the following technical parameters:

Tensile strength - 300-490 MPa.

• .

Lifetime - 20-50 years old, depending on the thickness and type of polymer coating.

Frost resistance - average indicators: 200 cycles freezing.

Fire safety - steel does not burn, the melting point is 1500 degrees.

Environmental safety - the profile material and the polymer coating are non-toxic, therefore they do not pose a threat to health and life.

It is worth noting that the metal tile tends to accumulate static electricity, therefore, for such a roof, the installation of a lightning rod is a prerequisite.

Table of characteristics depending on the type of coating

Roof sheet dimensions

In the manufacture of metal tiles, manufacturers try to adhere to standard sizes. It looks like this:

Width: 1 160-1 180 mm.

Length: 0.5-9 m.

Thickness: 0.4-0.6mm.

Wave pitch: 350 mm.

Profile height varies within 39-46 mm, depending on the manufacturer. It should be clarified that the width of the sheet is divided into actual and useful, both parameters are indicated on the packaging. Considering that the sheets are overlapped, the useful width is usually 1 100 mm.

Table with the main dimensions of some manufacturers

Weight of metal tiles per 1m 2

This parameter is usually indicated on the packaging and directly depends on the thickness and size of the sheet. Depending on the material used, the weight values ​​may vary. For example:

Galvanized steel - 3.8 kg.

Aluminum - 1.34-1.36 kg.

Copper - 4.45 kg.

The data is valid for standard sizes with sheet thickness 0.5mm. Weight is based on 1 m2. It is worth clarifying that the height of the profile and the thickness of the polymer coating can affect the mass of a metal tile sheet.

What's better? Brief comparative analysis

There are several types of roofing materials on the construction market, so buyers are often worried about the question: “Which type should I prefer?”. Consider a comparison of metal tiles with the most competitive types of roofing.

Metal tile or Decking

These are very similar materials made of galvanized steel with a polymer coating, but differ in technical characteristics. In particular:

Thickness. Decking looks more solid: 1.2mm against 0.6 at a metal tile at the maximum values.

The weight. The thickness of the material increases its mass; accordingly, a stronger base is required for the installation of corrugated board.

Appearance. The metal tile looks more textured, so the roof of this material looks much more interesting.

In terms of sound insulation and durability, both materials are identical, but corrugated board wins in terms of price. Therefore, if reliability and simplicity are important, it is undoubtedly better to use corrugated board, beautiful design of the roof and exquisite design - definitely a metal tile.

Metal tile or Ondulin

Ondulin is a soft roof, which is manufactured using a single technology and has standard sizes, regardless of the manufacturer.

Ondulin is much lighter than metal tiles, which simplifies the installation process. However, the metal tile looks stronger, does not burn, but loses in terms of sound insulation. It is worth noting that ondulin is more expensive and cannot boast of a diverse color palette. Therefore, when choosing roofing material for a private house, preference should be given to metal tiles, if we are talking about a small building (bath, garage, veranda), it is better to use ondulin.

Metal tile or Slate

This is where the first option wins. The metal tile does not require a strong crate, is resistant to direct exposure to ultraviolet radiation, and is not afraid of moisture. However, slate has better sound insulation and attracts buyers with an affordable price.

How to calculate the amount of material per roof

Calculations can be made independently, without resorting to complex mathematical formulas. To do this, you need to calculate the length of the ridge and roof slopes. Consider the calculation of the roof for a typical house with a gable roof, where the length of the ridge is 9.5 m, rays - 6 m. The following formula applies here:

We divide the length of the ridge by the useful width of the sheet ( 1.1 m). The result is 8.6 sheets. The resulting value is rounded up to an integer and we get 9 sheets.

The length of the slope is calculated by the wave step. Regardless of the manufacturer, this value is always 350 mm. As a result, to cover one side, it will take 17.14 waves.

Standard sheets are characterized by a structure in 10, 6, 3 and 1 wave. Therefore, the amount of material is determined from the calculation of these features.

Colors available to the consumer

The available color range depends on the specific manufacturer and, as a rule, the choice is in the range: from 5-10 options to 50 different colors and their shades. For the manager to understand you correctly, remember the code of the desired color according to the RAL table.

Popular options according to RAL scale

At the end of the article there are photos of what the material looks like directly on the roof.

Additional elements for a pitched roof

To increase the tightness and reliability of the roof, additional elements will be required. For metal tiles, the following products are used:

Flash strips.

Roof eaves.

Decoration for the ridge part of the roof.

Elements for internal corners.

Wind bars.

Adjoining planks.

Passage nodes.

In addition, elements can be installed to increase the safety of the roof: fences, stairs, walkways. Next, on convenient diagrams, we will consider the main stages of work.

His Majesty installation. Meet!

Prior to the installation of a roof made of metal tiles, a truss system and battens should be installed. For rafters, it is enough to use an edged board with a section 150x50 mm treated with an antiseptic.

First, you should perform work on the installation of all pipes and ventilation ducts, only then proceed to the installation of the roof.

The step of the rafters for a roof made of metal is taken in 600-900 mm, usually when constructing wooden floor beams, it is equal to the pitch of these beams.

Crate. Preparing a wooden base for roofing

The crate can be made both solid and sparse. Solid is arranged from edged boards, plywood, chipboard sheets. The distance (step) of the crate is set based on the step of the transverse wave.

When constructing a crate from an unedged board, it is necessary to carefully get rid of the bark even before antiseptic treatment.

A vapor barrier material is preliminarily mounted along the rafters to prevent condensate from getting on the surface of the attic space insulation or on the roof insulation (unless, of course, a warm roof is used).

We don't need condensation. Vapor barrier installation

Installation of the cornice strip

The next step is the installation of the cornice strip along with the hooks of the drain. The plank is mounted with an overlap 100-150 mm and fastened with screws.

How to lift material onto the roof without damaging it

The lifting of sheets is carried out in the old, and most likely already familiar to many old-fashioned ways.

Direction and layout of roofing sheets

Direction of installation depending on the type of roof.

Installation of sheets of metal tiles can be done from any side of the building, but you should immediately take into account the overhang of the material in 40-50 mm above the cornice.

When installing a roof made of metal tiles, step on the surface only between the waves of the material (see the figure above), shoes should be used with soft soles.

How to properly fix sheets of metal

Sheets are fastened with special self-tapping screws with gaskets, you can choose them to match the color of the sheets.

On the 1 sq.m roofing requires at least eight self-tapping screws.

The overlap of tile sheets is one wave in the horizontal direction, and in the vertical direction, the sheets of material must be selected for the entire length of the roof slope.

At the end of the installation of all sheets, a ridge is made. There is nothing difficult in this, you can pick up a metal skate of the desired color for sale. The ridge is fastened with nails or self-tapping screws to the boards of the batten, the ends of the ridge are closed with special plugs.

Mount thoroughly. The service life of a metal tile roof is at least 50 years!

Which brand is better to give preference to? Verified manufacturers

If we talk about manufacturers, we can distinguish such brands:

Finnish metal tiles are represented on the Russian market by the company RUUKKI. This is one of the leading European manufacturers offering the Monterrey profile with Purex polymer coating.

GRAND LINE. A Russian enterprise engaged in the manufacture of metal tiles in accordance with the latest developments in this field. The model range is represented by profiles "Monterrey" and "Country", coated with Polyester and SOLANO.

MERA SYSTEM. A Swedish company producing galvanized steel roof tiles with a sheet thickness of 0.45 mm. The company's products are resistant to sudden temperature changes and are available in various colors.

Of course, there are many more manufacturers of metal tiles, but here are companies that have been operating on the Russian market for a long time and have earned the trust of customers.

Photos of roofs of private houses. Take a look at the samples, maybe your roof will look the same!

If from all roofing materials, you have chosen a metal tile, then the first question that you will have is how much metal tile you need to purchase. This is logical, because before starting work on roof sheathing, you must purchase the right amount of metal tiles. This is not as difficult to do as it seems. It is only required to follow some rules, to know the area of ​​\u200b\u200bthe roof itself, as well as the dimensions of each sheet. With all this information, you can easily calculate how many tiles you need to cover your home. That is what we will do.

You will learn how to correctly calculate the metal roof tiles so that there are no extra parts left or you don’t have to go for additional consumables.

Rules for calculating metal roofing tiles

Metal tile is a convenient and practical type of roofing. I'm glad she's easy to work with. The profiles themselves are large, so installation is quite easy. I would like to say right away that manufacturers of products make metal tiles of standard sizes. They can be divided into two types:

• overall length and width;
• useful (working) length and width.

General indicators are the distance from one edge of the metal tile to the other. The minimum length indicator is 40 cm, the maximum is 8 m. The width of the metal tile is from 1.16 to 1.19 m. But, since in practice the parts are overlapped, a working length and width are required. This distance does not include overlap. Typically, the vertical overlap is 10 to 15 cm. The horizontal overlap is 6 or 8 mm. It turns out that the useful width is 1.11 m. But, if the roof has a slope of less than 8 m, then you can use one large sheet, and not join several in a vertical position. So, knowing the working width, you can perform the correct calculation. Let's look at everything with an example.

We determine the quantity

For calculations, you must have a calculator. If you do not know the width and length of the roof slope, then it must be measured. After all, sheets of metal will be attached from the ridge to the edge of the slope, so the length of the material will be almost identical to the slope from top to bottom. Only 5 cm will remain on the overhang. It is easy to take measurements when the roof structure is simple, for example, gable or shed. If the option is more complicated, it is better to invite a professional measurer who will do all the work.

Note! Metal tile specific coating. She is not symmetrical. What does it mean? And the fact that the profile can only be laid in one direction during installation. You will not be able to flip it 180˚ and use it in that position. In this regard, when working on a complex roof, there will be more waste of metal tiles. This is important to consider when purchasing.

What is required for calculations? You have to figure out how many rows will fit on one roof pitch. It's not that hard. Then, it remains only to find out the number of profiles in one row. And then everything is generally simple. At first glance, it may seem that calculating the amount is difficult and time-consuming, but it is not. It is better to do everything in advance, so as not to regret later.

We count the number of rows on the slope of the roof

All that is required is the width of the slope and the working width of the profile. The total width of the slope is divided by the working width of the profile, and the finished figure is rounded up. Let's say you measured the roof along the ridge, and you got 10 m. And you also know that the working width of the profile sheet is 1.1 m.

Note! Each manufacturer in the instructions for their product indicates the working width and length of the material.

How many rows will there be? 10 ÷ 1.1 \u003d 9.09. It becomes clear that for your roof, 10 m long, you will need 9 rows of metal tiles, the working width of which is 1.1 m. We found out the first indicator. Now let's start with the number of profiles in the rows.

The number of metal tiles in one row and their length

To find out, calculate the length of one roof element and the length of the overhang. We talked about the fact that they come in from 40 cm to 8 m. It is very good to work with long sheets, since they leave a minimum of waste. But, they are extremely problematic both to deliver to the object and to the roof. Therefore, the best option is considered to be the size of one profile from 4 to 4.5 m. It is easy and convenient to work with them, delivery can be done by conventional transport, and it will be more difficult to damage the material.

So, having calculated the size of the overhang from the cornice to the ridge, you got, for example, 6 m. Now, knowing the dimensions of the metal tile, you can find out their number in one row and, most importantly, the size of each profile. For 6 m, laying one profile will be problematic. You need to use two. Now we find out the required size of the first and second sheets. You need to use the formula: X \u003d A + B + C, where A is our slope length, B is the overhang at the eaves, C is the vertical overlap of the metal tile. Usually the overhang of the eaves is 5 cm, and the vertical overlap is at least 15 cm. In the event that the roof is small and only one sheet will be used, then the C number is not taken into account. If there are 3 of them, then two overlaps of 15 cm are considered.

For our sizes, use 3 pcs. irrationally. Two profiles are sufficient, in which the length of the bottom sheet is a multiple of the wave step of the metal tile. At the same time, 15 cm are added for overlap and 5 cm. So, the total length of the slope with overlap and eaves will be: 6 + 0.15 + 0.05 = 6.2 m. The lower profile will have a size equal to the wave step. Often it is a multiple of 35 cm. You calculate your indicator indicated by the manufacturer. Add an overlap to it. It turns out that the size of the lower profile can be as follows:

• 35×2+15= 85 cm;
• 35×3+15=120 cm;
• 35×4+15=155 cm.

This list goes on. But, if we bring it closer to our indicators, we will get the possible length of the lower element in: 190 cm, 225 cm, 330 cm. And now we need to calculate the average length of the roof. The total figure with an overlap and a cornice was 6.2 m. To find out the average, divide it in half. 6.2 ÷ 2 \u003d 3.1 m. From the calculations that we carried out above, the ideal size for the lower profile will be 330 cm (3.1 m). This number is a multiple of the wave step of the metal tile. So, we found out that the lower element will have a length of 3.3 m. And to find out the indicators of the second (upper), you need: 6.2–3.3 \u003d 2.9 m. That's all. As a result: for your roof slope of 6 m, you will need to lay 2 sheets of metal tiles, one of which is the lower one, has a size of 3.3 m, and the second, the upper one, is 2.9 m.

Total number of metal tiles per roof slope

We shook our brains a little, now we can summarize what we have learned. On a roof measuring 10 × 6 m, 9 rows of metal tiles will be required, in which there will be 2 sheets each (3.3 and 2.9 m). Their total number is 18 pcs. Nine of them are 3.3 m each and nine are 2.9 m each. But, these are consumables for only one side. If the coating is gable, then it will take twice as much.

Note! Do not take goods back to back. It is better to take 10% more, in reserve.

We count additional elements and fasteners

In addition to the sheets themselves, you will need to purchase the following components:

1. Figure horse.
2. End plank.
3. Cornice plank.
4. Snow holders.
5. Lower and upper valley.
6. Adjacency plank.

Additional elements are produced in a standard length of 2 m. We already know the width of the cornice, it is 10 m. Therefore, we need exactly 5 planks for it. But, during installation, it is imperative to overlap, which is 10 cm for the eaves, and 30 cm for the valley. Other additional parts are calculated exactly according to the same scheme. It is important to know only the indicators (ridge, valley, end) and divide it by the length of the additional element.

In addition, you can not do without fasteners. Sheets of metal tiles are fixed with special self-tapping screws with a washer head, having seals. Due to the fact that the color of the hats is the same as the color of the material, they are not too visible. And how to find out their number? There is an average figure, which is 7 self-tapping screws per 1 m 2 of roofing. All you need to find out is the area of ​​\u200b\u200bthe roof slope. The area formula is quite simple: S=a×b. Since we have a gable roof, the formula will look like this: S=(a×b) 2 . For example, let's take all the same indicators of 10 × 6 m. S = (10 × 6) 2 = 120 m 2. If 7 self-tapping screws are needed per 1 m 2, then exactly 840 pieces will be required for 120. We simply multiplied the total area by the number of screws. Now it remains to go to the store and buy them. One package has 250 pcs. How many packs do you need to buy then? 840÷250=3.36. You will have to buy 4 packs to have a spare. If this is a lot and there is an opportunity to buy separately, then buy 3 packs exactly and 90 pcs. apart.

If we talk about the installation of additional parts, then 6 self-tapping screws are required to fix them at 1 m. They are sold in packs of 100. in a pack. All this is calculated individually according to the same scheme.

Summing up

Before proceeding with the installation of the coating, any developer will first sit down and count the number of consumable parts and find out the cost of the finished coating. This is a very important step. No wonder folk wisdom says: "Measure seven times, cut once." After all, without knowing exactly how many consumables will be required, you will not be able to complete the installation. And buying everything by eye is very stupid. Well, if the metal tile is not enough. At any time, you can go and buy the missing number. When it is in excess, then these are funds spent on the wind. Therefore, use the tips from this article and find out the required amount of metal tiles. Then all the work will go smoothly and without any problems.

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The presence of excellent performance and ease of installation of metal tiles attract many developers. The material has a large number of advantages, which provides it with a leading position in the construction market. With the help of this roofing, presentable and durable structures are created.

Independent developers are often faced with the fact that extra sheets may remain during installation, or vice versa, there will not be enough material to lay the entire roof. Experts offer several options, which describe in detail how to calculate the metal roof tiles and save on its purchase.

How to correctly calculate the required amount of material

First you need to measure the roof. This work does not require special skills and knowledge, but a professional measurer with sufficient experience in this matter will do it better.

So, the calculation of a metal tile begins with finding out the dimensions of the roof slopes. Some difficulty in performing calculations can arise with complex roof structures and, as a rule, it is enough to simply calculate a single or gable rectangular roof.

If the developer is independently engaged in this work, then he must remember the main features of the roofing. Sheet materials such as metal profiles or slate are symmetrical, but the shape of the metal tile is completely different - it differs from simple materials, like.

Based on this, it turns out that when laying sheets, you need to choose one direction. Each sheet of material has an upper and lower part, which must be taken into account when working with it: the sheets must not be turned over or mixed up. Because of this, when working with complex roof structures with different internal and external angles (valleys), the consumption of tiles increases significantly, and, accordingly, the amount of waste. Small scraps of roofing are unlikely to be useful somewhere, so the estimate for a roof made of metal tiles is made taking into account these circumstances.

It is also important that the external profile of the metal tile copies the surface of a real tile coating. The step size of the waves is set by manufacturers in accordance with building codes and is 350 mm.

There will be no special problems when choosing a material related to dimensions, since the height of the metal tile profile, just like the width of the canvas, is offered in a standard size. In this case, it is necessary to distinguish between the concept of real width and the effective size of the material.

Description of the material count steps

For correct calculations of the amount of metal tiles you need to know:

• how many rows are placed on one slope;
• the number of sheets in a row and the length of 1 sheet.

Let's consider each stage in detail:

1. Counting the number of rows on the slopes. Before that, we measure the slope from the cornice or ridge, divide the resulting value (length) by the useful profile width, rounding up to a larger value. For example, with a slope of 6 m and a standard sheet of metal with a working width of 1.1 m, 6 rows of material will be fixed.
   
   Calculation: 6:1.1=5.45, which when rounded gives a value of 6, that is, six sheets.
2. Counting the number of sheets for each row and calculating their length. Based on the fact that manufacturers offer sheets to order of any length, the developer needs to know not only the consumption of metal tiles per 1 m2, but also the amount of material in accordance with a certain length of the sheet.

We propose a method for calculating the amount of material, taking into account the length of the sheets.

Initially, the total length of the roofing is calculated, for this, the length of the cornice overhang (usually 0.05 m) and the length of the vertical overlaps of the profiles are added to the length of the slope (from the eaves to the ridge).

If only 1 sheet fits into the length on the roof, then the last term from this formula is removed, but if several sheets are used, then 0.15 m is added for each overlap.

Properly drawn up estimates for the roof of metal tiles, as well as the calculation of the length of the sheets, allows you to reduce the level of waste during installation to a minimum.

Among the assortment offered on the market there is a metal tile up to 8 m long, however, the implementation of its installation and transportation is quite problematic. The most optimal is the order of sheets no more than 4-4.5 m.

Benefits of using standard sheets:

• the ability to quickly load and unload roofing material;
• use of conventional freight transport (no need for special equipment for long cargo);
• a small room with an optimal temperature regime will be enough to store the material;
• it is convenient to lift the sheets onto the roof, which reduces the risk of their accidental deformation;
• the shorter the length of the material, the lower the coefficient of change in its size arising from temperature and climatic changes. In a word, there is no strong stress of the metal, leading to breakage of fasteners.

Experts pay attention to the "forbidden length of the sheet." When using this concept, we are talking about the fact that cutting the material in length along the wave, even if this implies joining the metal tile between the sheets, is not recommended because of the likelihood of sheet deformation. To avoid such problems, it is better to cut the roofing only in certain places of the profile, as indicated in the photo.

Description of the "forbidden" length of the metal tile

Experienced builders, when calculating material consumption, use a special table that indicates the different lengths of roofing sheets.

For example, a residential building with a slope 6.1 m long is proposed. In this case, it is rather problematic to use 1 sheet for installation, so you will have to lay 2 sheets in a row. When calculating the length of the slope according to the formula prescribed above, the following will be obtained:

2. Counting the number of sheets in a row and their length

The total length of the sheets in a row is calculated by the formula D=A+B+C, where:
A - the length of the slope from the ridge to the eaves (or from the top point to the bottom point of the slope).
B - overhang from the cornice, equal to 50 mm *
C - vertical overlap of sheets equal to 150 mm.

If there are two sheets of metal tiles in a row (as in Fig. 3) or more, then each subsequent top sheet is superimposed on the bottom one, interlocking with each other at the “lock” site.
If it is decided to lay one sheet in a row, then its length is equal to the length of the slope plus the overhang of the cornice (50 mm). *
In places where there are adjunctions of another slope (valley, inclined ridge), the length of the sheet is chosen so that in each row the sheet completely covers all the bevels.

* The overhang is made so that in case of strong wind, drops of water do not fall under the roof sheets.

The final sheet length is adjusted so that the selected length does not fall into the “forbidden lengths” zone. When cutting sheets in the zone of "forbidden lengths", deformation of the sheets is possible, which leads to technological damage and further impossibility of installation.

Table of forbidden lengths of metal tiles, m

Example. If there are two sheets of metal tiles in a row:
The length of the bottom sheet is selected as a multiple of the vertical wave pitch (Grand Line® - 0.35 m) plus 0.15 m (overlap),
i.e. 2 x 0.35 + 0.15 = 0.85 m; 3 x 0.35 + 0.15 \u003d 1.2 m, etc.
Bottom sheet length 0.85; 1.2; 1.55; 1.9; 2.25; 2.6; 2.95 etc.

To choose the length of the bottom sheet from the entire row provided, divide the total length of the sheets (length of the slope, overhang, overlap) in half - we get the average length of the slope.
For the bottom sheet, choose the length closest to the average length of the slope. Then we find the length of the top sheet: subtract the length of the first sheet from the total length of the slope, adjust it in accordance with the table of forbidden lengths.

Advice:
Use sheets of metal tiles for your roof, no longer than 4-4.5 m. It may seem uneconomical for you to split a 6-meter slope into two halves, however, the recommended length has a number of significant advantages:
it is easier and cheaper to find transport for such a length;
it is cheaper to load, unload and move (it will take 1 person for 2-2.5 linear meters);
easier to store (takes up less space);
the probability of sheet deformation when climbing to the roof is reduced;
fewer installers required (cost reduction);
the coefficient of expansion of the metal at short lengths is not so noticeable and does not gain large values, which does not lead to a strong tension of the metal and subsequent tearing off of the screws (enlargement of the hole, destruction of the metal in these places).

How to save:
1. Production provides an opportunity to cut sheets according to the given lengths of slopes individually for your roof. This makes it possible to reduce roofing material waste during installation compared to installation of sheets of standard length.
2. You can calculate the amount of materials yourself, but in this case, there is a high probability of errors both up and down, which will lead to additional costs. Besides, it will take a long time. We advise you to turn to professionals, especially if your roof has a complex shape.

Calculation of the amount of hydro - and vapor barrier:

In rolls 75 m2, covered area - 65 m2 (10 m2 goes to overlaps of 15-20 cm, depending on the slope of the slope). To calculate the number of rolls, divide the total roof area by 65 m2 and round up.

Calculation of the volume of thermal insulation:

Multiply the total area of ​​the insulated roof by 0.2 m (recommended insulation thickness for the middle strip).

Calculation of additional elements:

The standard length of the additional elements is 2 m. For each type of plank, we add up the lengths of the sides of the slopes where they are needed, divide by 1.9 (taking into account the horizontal overlap of 10 cm), when calculating the lower valley, divide by 1.7 (taking into account the horizontal overlap of 30 cm ). The result is rounded up.

Calculation of the number of screws:

We multiply the total area of ​​\u200b\u200bthe roof by 7 pieces, we get the required amount. For additional elements - we multiply the total length of all planks by 8 pcs.

Sealant calculation:

A ridge seal is placed on a profiled product sheet under the ridge/valley. To calculate its length, you need to multiply the length of the ridge / valley by 2. Under the profiled product sheet at the eaves, at the junctions, a reverse seal is laid. Its length is equal to the length of the junction bar.

In our company you can order a professional calculation and installation, buy metal tiles, corrugated board and Grandline brand drains of the right size, which will allow you to avoid unnecessary costs.