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How to calculate the profiled sheet on the roof. How to calculate corrugated roofing. Self-calculation of sheets of corrugated board for the fence

Choosing a corrugated board for the roof of the house, it is very important to buy the right amount.

Not everyone can do this so that there is not a lot of waste left, and you also do not have to buy material again.

That is why there are certain methods that allow you to calculate the required number of sheets.

You need to familiarize yourself with them before making a purchase, as this allows you to save construction costs in some cases to a significant extent. Same way calculate roofing from corrugated board our corrugated roof calculator, which is located just below, will help you.

Roof decking is a metal profiled sheet made of high-strength steel by stamping and protected with special substances. It happens that differ significantly from each other. This also applies to their sizes, which are completely different in order to fully satisfy the needs of customers.

Thanks to technical capabilities modern machines, roofing corrugated boards up to 14 meters long can be manufactured at the production facilities. This allows the client to purchase such materials that, in terms of their dimensions, will be as close as possible to the size of the building itself.

It is a slightly smaller material parameter, since it takes into account that there must be an overlap between the vertical sheets.

Long products can significantly reduce the number of joints, with regard primarily to their horizontal position. This is important because this, in turn, has a direct impact on the tightness of the roof itself. If the length of one slope is less than 14 meters, horizontal joints can be completely avoided.

Profile dimensions

The use of long profile products also makes it possible to reduce material consumption, since short corrugated boards need to overlap each other.

  • Most commonly used for roofing corrugated board 6 meters long. This is due to the fact that it is quite simple to deliver it to the construction site, while 14-meter products need to be loaded into special vehicles. smallest length, which reaches a sheet of profiled metal, only 0.5 meters.
  • No less important is corrugated board width, the standard size of which is only 1250 millimeters. Often, wider sheets fall on the machine, but taking into account the bends, they lose their width. The higher the corrugation height, the narrower the material itself will be. That's why the profile of the C8 brand has a width of 1200 millimeters, and the H75 brand has a width of 800 millimeters.

Calculation of corrugated roofing: online calculator

With the help of this online calculator and you can calculate not only the amount of corrugated roofing, but also.

Designation of calculator fields

Calculation of corrugated roofing: online calculator roofing.

Specify roofing material:

Select a material from the list -- Slate (wavy asbestos cement sheets): Medium profile (11 kg/m2) Slate (corrugated asbestos-cement sheets): Reinforced profile (13 kg/m2) Corrugated cellulose-bitumen sheets (6 kg/m2) Bituminous (soft, flexible) tiles (15 kg/m2) From galvanized sheet (6.5 kg/m2) Sheet steel (8 kg/m2) Ceramic tiles (50 kg/m2) Cement-sand tiles (70 kg/m2) Metal tiles, corrugated board (5 kg/m2) Keramoplast (5.5 kg/m2) Seam roof (6 kg/m2) Polymer-sand tiles (25 kg/m2) Ondulin (Euro slate) (4 kg/m2) Composite tiles (7 kg/m2) Natural slate (40 kg/m2) Specify weight 1 square meter coverage (? kg/m2)

kg/m2

Enter the roof parameters (photo above):

Base Width A (cm)

Base length D (cm)

Lift height B (cm)

Length of side overhangs C (cm)

Front and rear overhang length E (cm)

Rafter:

Rafter step (cm)

Type of wood for rafters (cm)

Working section of the side rafter (optional) (cm)

Lathing calculation:

Purlin board width (cm)

Lathing board thickness (cm)

Distance between decking boards
F(cm)

Snow load calculation (pictured below):

Choose your region

1 (80/56 kg/m2) 2 (120/84 kg/m2) 3 (180/126 kg/m2) 4 (240/168 kg/m2) 5 (320/224 kg/m2) 6 ​​(400/280 kg/m2) 7 (480/336 kg/m2) 8 (560/392 kg/m2)

Wind load calculation:

Ia I II III IV V VI VII

Height to building ridge

5 m from 5 m to 10 m from 10 m

Terrain type

Open area Closed area Urban areas

Calculation results

Roof pitch: 0 degrees.

The angle of inclination is suitable for this material.

The angle of inclination for this material is desirable to increase!

It is desirable to reduce the angle of inclination for this material!

Roof surface area: 0 m2.

Approximate weight of roofing material: 0 kg.

Number of rolls of insulation material with 10% overlap (1x15 m): 0 rolls.

Rafter:

Load on the truss system: 0 kg/m2.

Rafter Length: 0 cm

Number of rafters: 0 pcs

Lathing:

Number of rows of lathing (for the entire roof): 0 rows.

Uniform distance between the boards of the crate: 0 cm

The number of boards of the crate with a standard length of 6 meters: 0 pcs

Volume of boards of an obreshetka: 0 m 3 .

Approximate weight of the boards of the crate: 0 kg.

Regions of snow and wind load

The amount of vertical and horizontal overlaps

The most important function of a roof is to protect a building from the elements. That is why the roof should be as more hermetic. In the case of roofing materials, this is achieved by laying sheets overlapping each other a. To prevent water from flowing under the roof, you need to adhere to certain material installations.

If for some reason it was not possible to purchase sheets of corrugated board corresponding to the length of the roof slopes, during installation it is necessary horizontal joints will be formed. In this case, it is important to overlap the sheets so that water flowing from above cannot penetrate between two adjacent profiled products in the same row. This value directly depends on the height of the profile itself, as well as on the roof slope.

In the case of using corrugated board of the HC8 brand with a roof slope angle of more than 15 degrees and a continuous crate, the overlap is two waves of the profile. This also applies to material grade HC10 with a roof slope of up to 15 degrees and a solid type of crate. In all other cases, sheets in one row can be overlapped in the amount of one profile wave.

Overlap size

As for the vertical overlap, only the angle of inclination of the roof slope affects it. The smaller it is, the more one profile product should overlap the other.. Experts distinguish the following indicators:

  • Up to 12 degrees– 200 mm overlap using a sealant for better protection;
  • Up to 14 degrees- an overlap of 200 or more millimeters;
  • 15 to 30 degrees- an overlap of 150-200 millimeters in size;
  • More than 30 degrees- an overlap of 100-150 millimeters in size.

By correctly positioning the sheets of corrugated board, you can not worry about the fact that water will flow under the roof.

How to calculate corrugated roofing

It is very important to correctly calculate before purchasing corrugated board the number of sheets it will take to cover the roof well without the additional cost and another visit to the hardware store. The main indicator that must be taken into account when determining the number of sheets is the area of ​​\u200b\u200bthe roof itself.

If the slope figure is triangular, you need to multiply its height by the length of the base.

For simpler calculations, it is worth breaking the roof into simple shapes. After determining the area of ​​\u200b\u200beach of the slopes, it must be summed up.

The resulting number will represent the area of ​​\u200b\u200bthe sheets of corrugated board that would be needed if they were installed next to each other. But since the material overlaps, this margin must also be taken into account, both vertical and horizontal elements.

CAREFULLY!

It is also important not to forget to take into account the cornice overhang, which is usually 100 millimeters.

After obtaining the value of the required area of ​​​​the material, it must be divided by the area of ​​\u200b\u200bone selected sheet. The number that will be the result of this calculation must be rounded up. The resulting number of sheets and should be ordered.

An example of the calculation of roofing corrugated board for a roof

As an example, the calculation of roofing corrugated board can be considered the usual gable roof with a dormer window on one side. First you need to measure all the initial data:

  • Skate length - 6.6 m;
  • The length of each of the slopes is 3.2 m;
  • Cornice overhang - 0.1 m;
  • Size A (length from the side edge of the slope to dormer window) - 2.5 m;
  • Size B (length from the lower edge of the slope to the dormer window) - 1 m;
  • Size C (length of the lower edge of the dormer window) - 1.1 m;
  • Dimension D (length from the point of intersection of the slopes of the dormer window to the roof eaves) - 1 m;
  • Size E (dormer window eaves length) - 2 m;
  • Size F (length of the lower dormer windows) - 1.5 m.

This roof consists of 4 elements, the area of ​​​​the material for each of which must be calculated. The first element is the roof slope where the dormer is located, the second element is the opposite roof slope, the third element is one dormer slope, the fourth element is the second dormer slope. The overlap was chosen to be 0.5 m. The consumption rate of corrugated board per 1 m2 of roofing has the following indicators:

  • Element No. 1: total area 21.12 m2 (useful area 21.78 m2, total area 23.36 m2, waste 3.03%);
  • Element No. 2: total area 20.46 m2 (useful area 21.78 m2, total area 23.36 m2, waste 6.06%);
  • Element No. 3: total area 1.5 m2 (useful area 2.75 m2, total area 2.95 m2, waste 45.45%);
  • Element No. 4: total area 1.5 m2 (useful area 2.75 m2, total area 2.95 m2, waste 45.45%).

The data obtained is as follows:

  • Sheets 0.9 m long - 2 pcs;
  • Sheets 1.6 m long - 2 pcs;
  • Sheets 3.3 m long - 12 pcs.

total area running meters for the considered roof was 44.60 m2. In order not to count manually, you can use our corrugated roofing calculator, which is presented above.

Conclusion

A preliminary calculation of the required amount of roofing material before purchasing it allows you not to worry that the work will not go as planned. Therefore, builders recommend that anyone who is going to block the house apply well-known techniques in practice, as this saves money, money and time.

It is worth remembering that the more complex the roof, the more difficult it will be to calculate, but this activity is worth its result, fully justifying itself.

In contact with

Calculating the amount of material that will be required to cover the roof is not difficult for conventional shed and gable roofs. For them, it is relatively easy to carry out manually. However, most people prefer to use an online corrugated roofing calculator.

An example of a calculator program window for calculating a roof from corrugated board

One such simple program is presented below.

Calculation of a roof from a professional flooring online

If you are the owner of a small individual home with a simple roof shape, it is best for you to do the calculation using a small program, which is located at the bottom of this section.

To use the online roofing calculator, you need to enter your data in the appropriate fields, select the type of roofing and the brand of the profiled sheet from the drop-down lists.


House size chart for online calculator

Keep in mind that the program necessarily calculates roofing cake, but does not consider the truss system. In addition, all received values ​​are rounded up. However, you will need to take into account the possible percentage of marriage for each item, based on the quality of the material you plan to use.

note

The calculator considers a gable roof, placing the ridge at the middle of the width of the building. If you want the ridge to be located not along, but across the long side of the house, simply enter its width in the "House length" field, and its length in the "House width" field.

After you enter all the values, click on the "Calculate" button and the roofing calculator from the profiled sheet will calculate the amount of materials required in your case.

Calculation of the profiled sheet on the roof online
roof type Select Single Slope Symmetrical Dual Slope
House length m.
house width m.
roof pitch m.
Type of corrugated board Select Galvanized Polyester Pural Textured
Profiled brand Select Profiled H20-1060-0.5 Profiled H20-1060-0.6 Profiled H20-1060-0.7 Profiled S21-1000-0.5 Profiled S21-1000-0.6 Profiled S21-1000-0.7 Profiled HC35-1000-0.5 Profiled HC35-0.1000 HC35-1000-0.7 Profiled sheet S44-1000-0.5 Profiled sheet S44-1000-0.6 Profiled sheet S44-1000-0.7 Profiled sheet H60-845-0.7 Profiled sheet H60-845-0.8 Profiled sheet H60-845-0.9 m.
Type of vapor and waterproofing Select Polyethylene film Polypropylene film Glassine
Insulation type Select Expanded polystyrene foam Polyurethane foam Basalt slabs Glass wool

Roof decking calculator - program features

There are many programs for calculating the roof: the need for materials and their cost. The simplest ones are for individual developers, the more complex ones are for designers and architects.

Such applications need to be installed on your computer, and some require quite a lot of study before you can work with them. Therefore, it is not advisable to use them for gable and shed roofs - if you need to calculate the corrugated roofing, the calculator presented above, better fit for such a task.

It's quite different when we are talking about roofs of complex, broken shape with a large number of joints, valleys and skylights. Calculating the roof in this case is extremely difficult to do manually, the online roof calculator from corrugated board is not able to do this, so the only option is to use multifunctional programs.

Naturally, they allow you to calculate the roof not only from a profiled sheet, but also from other materials, including metal tiles and tiles. At the same time, in most of them, you can set almost any roof configuration, resulting in not only a detailed quantitative calculation, but also a sheet layout scheme.

The most simple and easy-to-learn program for calculating corrugated roofing is "Roofing Pro".

"Roofing Profi" - features and capabilities of the program

This program for calculating the roof is quite simple to learn and can be easily used even by a person who has a very distant relation to the construction site. The only thing that will be needed is the ability to work with a drawing own house and school mathematics curriculum.


The Roofing Profi program for calculating roofs made of corrugated board, metal tiles, tiles and other materials

The main features of the "Roofing Profi" program:

  1. Creating a Layout Sheet corrugated board, taking into account overlaps.
  2. Calculation of the number of sheets and additional elements necessary for the complete overlap of the roof.
  3. Setting initial data in a separate window and the ability to change them at any time, including sheet characteristics, overlap sizes, sizes and types of additional elements, as well as prices.
  4. Choosing a ramp shape from templates or drawing it in a convenient and understandable interface.
  5. corrugated roof cost calculator depending on the set prices or the selected supplier.

These are not all the features of the program, but they are the most important for our purposes.

When working with an application, it is worth considering its features. In particular, the calculation should be carried out for geometric figure, in the form of which the roof slope is made, and for each separately. This is not very visual, but it allows you to eliminate the possibility of error.

Also, if you don't use templates, this roof profile calculator can only calculate correctly if the roof slope shape is a closed polygon. Otherwise, the calculation will be incorrect, as well as the sheet layout scheme.

The procedure for working with the program "Roof Profi"

Since the application will be used solely as a calculator for calculating the roof from corrugated board, we are not interested in other sections and materials. However, the calculation approach is the same.

Working with initial data for calculation in the Roofing Profi program

After starting the program, you will need to create a new file, enter its name for convenience and select as the calculation type "Professional". You will see the initial data window, which was already mentioned above. For the calculation, you can choose one of two examples, or create your own calculation by clicking the button "Create a new entry", which is located to the right of the button "Back".

Now, on the left side of the window, you need to enter the calculated data for the corrugated board that you will use. Please note that this calculator for calculating the profiled sheet for the roof allows you to specify, among other things, the price of the sheets, thanks to which you will receive not only the layout scheme, but also the total cost of the roof. True, it will take into account only the costs of the profiled sheet itself, self-tapping screws and additional elements.

Let's assume that S21-1000-0.7 corrugated board will be used to cover the roof. The filled values ​​for this profiled sheet are shown in the figure below.


Eaves overhang, overlap and ridge ceiling are determined based on the slope of the roof. .

The consumption of self-tapping screws, as a rule, is 8-9 pieces per 1 m² for any roof. For calculation, it is better to use the minimum packaging available to you.


Entering the types and sizes of additional elements in the Roofing Profi program

The five most commonly used are:

  • eaves plank;
  • gable (wind, end) plank;
  • valley;
  • external corner strip;
  • skate.

After you have entered all the data, click the button "OK", and then - "Further".

How to draw a roof slope in the Roofing Pro app

After filling in the table of initial data, a window should open in front of you to display the shape and size of the ramp. As mentioned above, the calculation must be carried out for each, even the smallest slope, separately. In most cases, to display the slope, it is enough to use the templates located on the left.

Save more often

I advise you to save as often as possible - in some operating systems, the roof roof calculation program can work with departures.

So, let's say that we cover the hip roof. In this case, there will be four slopes: two identical ones in the shape of a trapezoid and two more in the shape of a triangle.


Program "Roofing Profi" - data entry about the grade of the profiled sheet

To begin with, let's draw a trapezoid (6th template at the top in the right column), taking into account that its larger base is 20 m, the smaller one is 12 m, the height is 10 m, and half the difference between the length of the larger and smaller bases is 4 m. After that, at the top left a table will appear with four values ​​of the sides of the polygon. Now, opposite each face, you should choose which of the additional elements will be used:

  • lower base (a) - eaves plank;
  • upper base (s) - skate;
  • edges b and d — outer corner strip.

The scheme of fastening sheets on a slope and the calculation of the amount of material


Scheme of laying sheets on a slope in the "Roofing Profi" program

The program for calculating the roof allows you to print, save as a drawing and edit the resulting scheme. In addition, you can change the length of any sheet of corrugated board to minimize cutoffs or allow them to be used in a different area.

One of the main advantages of corrugated board is that even with minimal skills and experience, roofing from this material can be mounted quickly and easily. This, depending on the complexity of the design, usually takes from one to three days. Therefore, it is very important to correctly calculate the amount of corrugated board on the roof. This will allow you not to overpay for the purchased materials, avoiding the formation of surpluses. At the same time, the lack of corrugated board will lead to an increase in installation time and additional transportation costs.

Calculation of corrugated roofing - an important stage in the construction of a house

Start calculating the roof from the profiled sheet with counting the amount of materials needed for the installation of the crate. It is usually performed from edged board, 30 mm thick and 100 mm wide. The step of the lathing depends on the bearing capacity of the corrugated board, which is determined by the height of the trapezoid or profile wave, and the angle of the roof. For roofs of residential buildings, batten boards are most often fixed at a distance of 30 cm from each other. All measurements made before calculating the roofing from corrugated board are performed only after the installation of the crate.

The calculation of the roofing from the corrugated board of a small individual residential building can be done manually, without the involvement of specialists. To do this, first of all, determine the number of additional elements required for the selected roof structure.

Calculation of roofing from corrugated board: calculation of additional roofing elements

Additional elements include parts necessary to protect the edges of roof slopes, the joints of their planes, as well as various junctions. These elements include different junction bars, skates and valleys.

Calculation of the number of ridge elements

The number of ridge elements and valleys significantly affects the calculation of the amount of corrugated roofing for the roof. Ridges are designed to protect the intersections of roof slopes, forming outer corner, from falling under the roof of rainwater and snow. These places include the ridge of a gable roof and sloping ridges between the slopes of a hip roof.


Fastening of a ridge segment with a standard length of 2 meters

When calculating corrugated roofing, you must always remember that the roofing of the slopes should not be connected in the region of the ridge. On both slopes, the corrugated board should not reach the ridge by approximately 100 mm. This gap is needed for ventilation of the roofing and the entire under-roof space.

The standard length of the ridge for corrugated board is 2 meters, but it can be longer - up to 3 meters. A longer skate is not made in principle, since with a shoulder width of up to 300 mm, the probability of deformation of the skate more than 3 meters is very high. overlap ridge elements on top of each other equal to 150-200 mm, therefore, when calculating the number of ridge elements, it is necessary to subtract the overlap from the length of the ridge. After that, divide the length of the roof by the resulting number.

For example,

With a roof ridge length of 10 meters, a ridge element length of 2 meters and an overlap of 200 mm, 10 / (2-0.2) = 5.5 ridge elements will be required. Naturally, this figure must be rounded up. Or choose the length of the ridge element so that there is no trimming. In this case, the optimal length of the ridge will be 1.85 m.

Calculation of the number of valleys

In the same way as from ridge elements, the calculation of the number of profiled sheets per roof depends on the number of valleys. Valley, or groove, is called the junction of the roof slopes, forming inner corner. At the place of installation of the bottom bar of the valley, the edges of the corrugated boarding of the slopes should also not adjoin each other closely. This must also be taken into account when calculating the profiled sheet on the roof.


Calculation of the number of valley planks for corrugated roofing

The length of the valley segment is also 2 to 3 meters. The overlap between them should be 300 mm, a smaller overlap of 200 mm is only possible with a roof pitch of more than 30°.

For example,

With a roof valley length of 8 meters and a segment length of 2 meters, the number of elements will be: 8 / (2-0.3) \u003d 4.7 pieces. Round up and get 5 pieces. The optimal length of the valley segment in this case will be 1.9 meters.

Calculation of the number of eaves and wind (front, end) slats

The length of the cornice strip is usually in the range from 600 to 700 mm with a necessary overlap between them of 100 mm. Insofar as optimal length it is impractical to find in this case, you can immediately subtract the overlap from the total length of the cornice scarf and take the resulting value as a useful length. It is by the useful length that it is necessary to divide the length of the overhang in order to obtain the required number of elements.

In particular,

For an overhang of 10 meters long and an element length of 600 mm, the useful length of the eaves strip will be 500 mm, and the total number of segments will be 20.

For the end plate, the same calculation principle applies. The only difference is the possibility of a very small overlap (up to 20 mm) at very large angles of inclination of the roof. However, in most cases, for reliability, the overlap, nevertheless, is taken equal to 100 mm.

Calculation of corrugated board on the roof of a house with a simple gable roof

The simplest design is a shed or gable roof with rectangular slopes. In this case, before measurements, the flatness of the slopes is checked and, by measuring the diagonals, their squareness is checked. Then a sketch of the roof is made, broken down into separate rectangles.

When determining the area of ​​the rectangle, the size of the gap between the roofing and the ridge is taken into account, as well as the size of the gable and cornice overhangs. The cornice overhang should be about 500 mm, and the gable - 300-400 mm.


Before calculating the corrugated roofing, you need to determine the size of the vertical overlaps between the sheets. If the size of the slope plane from the gable side is less than six meters, it is better to mount the roof from whole sheets. This will save on corrugated board due to the absence of vertical overlap between the sheets, as well as eliminate the possibility of roof leakage at the transverse joints. With a higher slope height, the corrugated board will have to be mounted in two rows, since the delivery of longer profiled sheets will be very expensive.

The overlap between the rows of corrugated board depends on the slope of the roof. If the angle of inclination is 15°, the overlap should be at least 200 mm, but if the roof slope is 30° or more, an overlap of 100-150 mm is sufficient.

Before you calculate the profiled sheet for the roof, you need to determine the size of the longitudinal overlaps between adjacent sheets. Usually this overlap is performed in one wave and is 80-100 mm. To calculate the number of sheets of corrugated board on each plane, we divide the coverage area by the usable area of ​​​​one sheet minus the area of ​​\u200b\u200bvertical overlap, if any. At the same time, it must be remembered that the marking of the corrugated board indicates the working width of the sheet, which already takes into account the magnitude of the longitudinal overlap.

Calculate the amount of corrugated board for one slope of a gable roof

The slope area is 120 m². As a roofing we will take NS-35 corrugated board, whose useful width is 1000 mm.

Let the width of the slope, taking into account the ridge indent, be 7.5 m, therefore, to cover it, the length of one sheet will not be enough for us, so we will use two sheets, 4 meters long. With a vertical overlap of even 300 mm, this length is enough to form a cornice overhang. Subtract 300 mm of overlap and 200 mm of overhang from the sheet length, resulting in a useful sheet length of 3.5 m.

Galvanized steel corrugated board is a popular roofing material, its advantages include affordable cost and easy installation that you can do yourself. Roofing from corrugated board is widely used in industrial and private construction. When designing a roof, it is important to correctly calculate the profiled roofing.

Roof design

Decking is used to cover pitched roofs. It can be a single-pitched roof, a double-pitched, a four-pitched or complicated roof. It is important to choose the optimal angle of inclination of the slopes so that the roof can withstand wind and snow loads. The angle of inclination of the roof slopes directly affects parameters such as:

  • sheet thickness and depth of corrugated board relief;
  • required number of sheets.

The greater the angle of inclination of the slope, the greater the surface area of ​​the roof. At the same time, the wind load is higher due to windage, but the snow load is lower, since snow rolls down from steep slopes under its own weight. Thus, for the manufacture of roofs with a slope angle of 45 degrees or more, a profiled sheet of lesser thickness can be used.

Roofs with a slight pitch angle need to be regularly cleared of snow. It is recommended to mount steel sheets of greater thickness on them so that the coating can withstand the snow mass, and also does not deform under the weight of a person. The minimum slope of a corrugated roof, according to the requirements of SNiP, is 12 degrees. The installation of such a roof is carried out according to standard technology, but it is desirable to treat the vertical and horizontal joints of the sheets with a sealant.

Table 1. Dependence of the overlap of corrugated board on the angle of the roof slope

The grade of the profile directly affects the dimensions of the vertical and horizontal overlaps, which should be taken into account when calculating the roof decking.

Incorrect calculation of the amount of material for roofing works entails additional costs for the purchase of excess material, or loss of time and money, as a result of organizing re-purchase and delivery of missing items. You can perform calculations using a special program or manually.

Programs for calculations

Specialized roofing calculation programs are characterized by:

  • high speed of calculations;
  • the ability to calculate the slope of the roof from corrugated board, castle floors, overlap of materials and other parameters;
  • the ability to change the parameters of some roofing elements and compare the results;
  • suitability for the calculation of complex roofs.

With the help of the program, you can choose best way arrangement and fastening of sheets. If it is supposed to use corrugated board of various colors, software calculation will allow you to harmoniously arrange colored stripes or squares.

When designing complex roofs with a large number of slopes, it is recommended to resort to software calculation or the help of professional architects.

Roof elements made of corrugated board

To calculate the amount of corrugated roofing country house, shed or garage, you do not need to use the program, it is enough to use certain mathematical formulas and know some subtleties. The accuracy of the calculations will be somewhat lower, but this is not essential when installing simple roofs.

First of all, it is necessary to take into account:

  • the number of roof slopes (inclined surfaces that provide rainfall runoff);
  • the area and shape of each roof slope;
  • slope (the angle of inclination of the slope, i.e. the overhang of the roof relative to the horizon).
  • ridge (rib formed by the horizontal intersection of the slopes);
  • ridge plank (covers external fractures of the roof, protecting them from precipitation);
  • ridge cap (protects against moisture penetration under the roof);
  • the ridge (rib) of the roof (the outer corner at the junction of the slopes, located at an angle to the horizon);
  • valley, or groove (inner corner formed by the intersection of the slopes);
  • valley plank (serves to drain water);
  • cornice and frontal overhang (edges of the roofing protruding beyond the plane of the wall);
  • cornice strip (protects the crate, frontal board from precipitation, removes moisture to the gutter;
  • end (lateral sides of the slopes);
  • end plate (protects the ends from gusts of wind);
  • junction strips (protect the joints of structures, including walls, pipes, from precipitation from precipitation).

Basic principles of self-calculation

How to calculate the corrugated board on the roof? The slope of the roof (depending on its configuration) is a rectangle, triangle or trapezoid. To calculate its area, you need to use the appropriate geometric formulas. The total surface area of ​​the roof is equal to the sum of the areas of the slopes. Then you should determine the length of the ridge, ribs, valleys, junctions, the length of the eaves and end overhangs.

The profiled sheet has two widths:

  • full (total) - 1180 mm;
  • working (useful) - 1100 mm.

The calculations take into account the working dimensions of the corrugated sheets for the roof.

On average, to determine how many profiled sheets are required to lay a horizontal row, the length of the roof slope is divided by the working width of the sheet. The result is rounded up. With this calculation, the overlap of the material is 80 mm (total sheet width minus the working one).

Table 2. Dependence of vertical overlap on sheet grade

In addition, the overlap depends on the angle of inclination of the slope. For a roof with a slope angle of up to 15 degrees, the C-10 profiled sheet is laid with an overlap in two corrugations, and for roofs with a large slope, installation with an overlap in one corrugation is acceptable.

When counting the number of sheets in a horizontal row, one should not forget about the designed width of the gable overhangs (roof protrusions beyond the wall plane).

Then you need to determine how many horizontal rows of material will be required. The projected length of the roof slope together with the eaves and the length of the roofing sheet are taken as a basis. It is important to choose the right size of the horizontal overlap to ensure the necessary reliability of the coating. This parameter depends on the slope angle (see Table 1).

Table 3

Additional elements

When calculating the amount of roofing materials, special attention should be paid to additional elements. Their standard length is 2 meters. It is necessary to add the lengths of the slopes on which they will be installed, and divide the resulting value by 1.9. The considered overlap is 10-20 cm.

When calculating the valleys, the sum of the lengths should be divided by 1.7 - the overlap should be 30 centimeters. The result is rounded up, since the amount of overlap should not be reduced - this reduces reliability. roof structure. It is recommended to immediately calculate the minimum required number of fasteners - self-tapping screws with special rubber gaskets that protect the attachment points from moisture. For one square meter corrugated boarding requires 7-8 self-tapping screws. For a two-meter additional element - 8 pieces. Knowing these values, you can perform the necessary calculations.

By correctly calculating how much corrugated roofing is needed on the roof, you can install the roofing in one step, as well as minimize the amount of waste and unused material.

Decking or corrugated sheet is a popular product in the construction industry. This material is widely used in the construction of structures for various purposes. Many users have already appreciated the versatility of metal profiled sheets, making fences, partitions, suspended ceiling systems and so on from them. However, most often such flooring is faced with roofs on private houses. This is due to the excellent performance characteristics of the coating. After all, corrugated board has high strength, longevity, reliability, resistance to external aggressive conditions, as well as the necessary aesthetics. Deciding to execute finishing roofing with the help of profiled sheets on your own, first of all, you should know how to calculate the corrugated board for the roof. After all, budget savings depend on a correctly made calculation, since by purchasing only the required amount of material, and optimally placing it on the slopes, you can avoid a large amount of waste and unnecessary joining of sheets. It is also important to calculate fasteners and other components. It is worth talking about how to do this in more detail. First you need to decide on.

Technical characteristics of the profiled sheet

Decking is a material made from rolled steel of various thicknesses. Raw materials pass through the lines of automated machines with special rollers, which give finished product typical profile. You should be aware that the height of the corrugations can vary significantly. As a rule, the higher the profile, the stronger the material; also, to reinforce the sheets, manufacturers can apply additional grooves on each wave, acting as stiffeners. For roofing systems, it is desirable to use corrugated board with high performance characteristics. Most often, such a product is marked as a carrier material, that is, it has the code "H". You can also find out from the label:

  • corrugation height;
  • metal profile thickness;
  • installation width;
  • product length.

    • And some other important values, for example, the type of coverage and so on. However, in order to calculate the corrugated roofing for the roof, these characteristics will be enough. Consider the standard values ​​of the 3 main parameters.
    1. Wave height and step. This setting depends on . In particular, it is customary to distinguish between the following varieties:

    • C - wall profiled sheet (used for wall decoration and other facing works, profile height 8-44 mm);
    • H - load-bearing corrugated board (used for roofing, installation of fences, during the construction of load-bearing structures, the height of the corrugation is more than 44 mm);
    • HC is a universal material (it can be used as a product for facing works, for mounting partitions, roofing, and so on, profile height 35-44 mm).

    That is, you can purchase corrugated board, with a profile height of 8 to 114 mm, and the higher this parameter, the more durable the material is. As for the wave pitch, the value can also vary between 4-20 cm. When calculating the profiled sheet, this parameter should be taken into account in order to know how much overlap can be made.

    2. The width of the corrugated board. As a rule, in a sheet-type material, it is customary to distinguish between two types of width. This is:

    • general - that is, the full size from edge to edge;
    • useful - this is the size, minus the overlap that is formed during installation, therefore this parameter is also called the installation width.

    As a rule, the useful width differs from the total by approximately 4-10 cm. Manufacturers indicate these parameters in the instructions for the material, as well as the recommended overlap size when installing the product on slopes with different angle tilt. The standard width is considered to be in the range from 98 to 185 cm.

    3. The length of the profiled sheet. Since it roll material, then the length can be quite large, including, you can purchase products to order. The parameters from 40 cm to 14.5 m are considered standard. It is most convenient to work with sheets whose length is 3-4 m. It is recommended to choose such a corrugated board, the length of which would be equal to the length of the slopes plus the allowance for the cornice overhang. If the slopes are quite long, then you can make additional docking horizontally. In this case, the specific size of the overlap will depend on. For example:

    • an angle of less than 15 degrees - an overlap of more than 20 cm;
    • angle 15-30 degrees - overlap 15-20 cm;
    • an angle of more than 30 degrees - an overlap of 10-15 cm.

    Calculation of corrugated roofing

    Due to the fact that the profiled sheet is produced in various sizes, it is possible to cover the roof from the ridge to the edge of the overhang with solid sheets. This eliminates the process of cutting sheets, as well as unnecessary joints in height. That is, to calculate the required amount of material, it is necessary to take into account such parameters as:

    • slope width - calculated according to the length of the ridge beam;
    • the length of the slopes is the distance from the eaves to the ridge plus the cornice overhang.

    To calculate the number of sheets, it is necessary to divide the slope width parameter by the useful width of 1 sheet of corrugated board. In this case, the resulting amount should be rounded up to a whole number. In order to calculate the area (in sq.m) of the coating, the resulting number of sheets should be multiplied by the length and total width. It is worth noting that it is quite easy to calculate the amount of material for a simple shed or gable roof. However, if the roof has a large number of slopes of various shapes and additional elements, for example, in the form of skylights, it is recommended to entrust the calculation to professionals. Since in this case it will be necessary to determine the area of ​​\u200b\u200beach element, then complete the drawing and calculate the required amount of material already on the project. It is important to say separately about. Their approximate consumption will be 30-50 pieces per 1 sheet of corrugated board. That is, it is recommended to use 5-7 fasteners per 1 sq. m. of the coating. In addition, 3-5 self-tapping screws are also required for 1 running meter of additional elements. It is most convenient to make calculations in special calculator programs that can be found on many specialized sites on the Internet.

    Programs for calculating the profiled sheet

    If you don’t trust your own engineering and mathematical skills, then you can always play it safe in calculations using special online calculators. In such programs, the calculation of the roof from corrugated board is done quite quickly. In this case, the roof can even have a complex configuration, the program will automatically calculate the required amount of material for each slope. To get started with one of these services, you need to know certain parameters. In particular, we are talking about such quantities as:

    • building length;
    • the width of the house;
    • roof length;
    • roof height;
    • the number of slopes;
    • the size of the overhangs on each side;
    • opening area, if any.

    By entering all the values ​​in the required fields, you can easily calculate the parameters of the roof. If you want to know how much corrugated board with certain parameters will be required for specific slopes, then you must also enter the following values ​​into the program:

    In addition, many online calculators allow you to calculate the cost of materials, including the necessary. To determine this, it is enough to enter the price for 1 sheet into the program or for 1 sq.m of the product, as well as indicate how much the package of self-tapping screws costs and how many of them are in the pack. Then it remains only to look at the result of the calculations and go to the store to purchase the required number of products. However, it should be understood that when buying, it is imperative to make a stock of materials, approximately 10%. This allows you to cut sheets of corrugated board without worrying about spoiling anything, and also not saving on fixing elements, if such a need arises. After all, it is always better to strengthen the coating on the roof reliably, this will help to do the job most efficiently, and further operation as safe as possible.