How to correctly calculate the footage of the filing of the roof of the roofs. Calculation of the square of the roof or how to calculate the area of the roof using an online calculator. Calculation of a broken mansard roof

But the roof slopes themselves are, as a rule, four geometric shapes:

rectangle
trapezoid
equilateral triangle
parallelogram

In this article, we will only consider the area of pitched roofs, we will not calculate the area of flat and inverted roofs, because the area of such roofs, in most cases, will be equal to the area of the house or part of it under this roof.

And if you learn to calculate the area of \u200b\u200beach such slope separately, the formulas of which are presented below in the diagrams, then it will be very easy to calculate the total roof area.

It must be remembered that the more slopes on the roof, the more difficult it will be, not only in terms of construction, but also roof insulation, its decoration and maintenance. And during the construction itself, there will be a lot of unused scraps, which will become unnecessary financial costs.

And so, before you get a calculator and start counting, you need to have a roof plan on hand. If there is none, then you will have to take a tape measure, a sheet of paper, a pencil and start measuring the slopes.

What sizes of slopes are needed, and what exactly to measure, depends on the type of roof of a private house, which are described in detail in one of the previous articles, and here I will tell you how to correctly apply the area calculation to a specific type.

Calculation of the area of \u200b\u200bshed roof

This is the simplest calculation that can be done without a detailed house roof plan.

It is necessary to measure the length C and the width D of the slope.

It is not difficult to calculate the length of the slope, it is necessary to measure the length of the building and do not forget to add roof overhangs on both sides. If for some reason it is not possible to measure the width of the slope, then you will have to measure the height of the roof B and the projection of the slope A (according to the diagram). After we apply the Pythagorean theorem and find the width of the slope C.

Calculation of the area of \u200b\u200ba gable roof of a house

The calculation of such a roof, I think, is also not difficult.

Calculation of the area of the hip, semi-hip and hipped roof of a private house

For the calculation, it is necessary to mentally break the hip roof into four separate slopes, as shown in the diagram, and then count each slope separately.
After splitting, you should have two trapezoids and two equilateral triangles if the opposite slopes are equal.

Now we calculate the areas of these geometric figures using simple geometric formulas, then add the resulting areas of the figures. This completes the calculation, as you have seen, there is nothing complicated here.

Half-hipped roof area a private house is considered exactly the same, except that the triangular slopes will be smaller than those of the hip, and the main large slopes must be divided into two geometric shapes, a trapezoid and a rectangle, calculating their area separately.

Counting Technology hipped roof area the house is no different from the hip, we also break the roof into four slopes, only here we should already get four equilateral triangles. The area of these triangles is calculated in the same way as in the previous examples.

Calculation of the area of a complex roof with numerous slopes

Such roofs, as a rule, include domed and multi-gable roofs of private houses, containing a large number of different slopes.

Although the formulas for calculations are very simple, it will still not be easy to calculate the area of \u200b\u200bsuch a roof. The whole difficulty will lie in a large number of measurements, because each slope will have to be measured separately, and the more complex the roof, the more difficult it will be to do. The task can be made easier by having an accurate roof plan.

Complex roof area calculation technology

To begin with, we break the roof into separate flat slopes. As already mentioned at the very beginning, the slopes of a complex roof can be in the form of three geometric shapes:

equilateral triangle
rectangle or square
trapezoid
parallelogram

Calculation of material for the roof of a private house

Calculating the material for the roof is much more difficult than calculating the area of the roof itself. Sometimes the roof area is half the area of the ordered material. In order not to make mistakes in the calculations and not to buy too much, and it happens even worse when there is not enough material, you need to contact the specialists from the company from which you will order the material. For most organizations, this service is free. They will very accurately count the number and size of the sheets and give you a layout of them on the roof.

Since roofing materials are usually rectangular in shape, and roof slopes are not always, sheets will have to be cut and adjusted to the angles of the slope. And the more complex the roof, the more unnecessary scraps you will have. It must be remembered, no matter what material you choose for roofing, during installation, the layout of the sheets should always be at your fingertips so that you do not cut off the wrong sheet when cutting.

The construction of each house does not begin with digging pits and not with pouring foundations.

Construction begins with the development of the project and the execution of calculations.

With the roof, everything happens in the same way: before proceeding with its installation, a careful calculation of the height, the size of its surface is performed, the number of structural elements and the amount of material for the roofing pie are determined.

The strength and reliability of the roof, as well as the amount of financial resources that will be spent on its installation, depend on the correctness of the calculation performed.

The surface calculation always starts with:

measurements of the main parameters of the roof: the angle of inclination, the length of the ridge, the length, width and height;
determining the type of roofing material that is planned to be used in the future when installing the roof.

One of the most important characteristics is the calculated coefficient used in almost all formulas in calculations.

The value of this coefficient depends on what is the angle of inclination of the slopes on your house.

For the most popular tilt angles, the coefficient is:

9 degrees - coefficient. 1.01;
14 degrees - coefficient. 1.03;
18 degrees - coefficient. 1.05;
23 degrees - coefficient. 1.08;
27 degrees - coefficient. 1.12;
34 degrees - coefficient. 1.20.

If the shape of the roof is complex, irregular in shape, then during calculations its surface is divided into separate regular figures, the area for which is considered elementary.

And at the end the results are summarized.

The order of calculations for a pitched roof

This is geometry from a school course.

Houses on which a shed roof is arranged are usually covered with simple materials.

And rectangle is the most common shape.

Therefore, it is enough to measure the length and width of such a rectangle and multiply them.

Also, do not forget the coefficient mentioned above.

We calculate a gable roof

Calculations for the surface of a gable roof are more complicated.

Yes, and there are many more factors to consider in such calculations.

To begin with, we decompose all complex elements into separate simple shapes: rectangles, squares, triangles.

Indeed, on the roof, each corner is formed only by an overlap and a slope.

Therefore, in order to calculate the roof surface, it is necessary to multiply the area of \u200b\u200beach slope by the cosine of the angle of inclination.

With this calculation, the length of the slope is the distance from the ridge to the cornice line.

In exactly the same way, any roof with any number of slopes is calculated.

You just need to sum the resulting surfaces of all the slopes, multiplied by the cosines of their angles.

If the roof element has a complex irregular shape, then it is also divided into several simple geometric shapes and the area of \u200b\u200beach of them is considered.

Then all surfaces are summed.

Let's look at how this is done in the following example: the house has dimensions of 10 x 8 meters.

The rafters are 4.5 meters long.

Naturally, there is an overhang.

The length of the overhang is standard - 50 cm.

First, we calculate what surface one slope has:

S = (10 + 0.5 + 0.5) x (4.5 x 0.5) = 55 square meters.

Since the building has two such slopes, the total area will be 55 x 2 = 110 square meters.

Despite the fact that on any roof there are ventilation ducts, chimneys, dormers and skylights, parapets, they are not taken away from the resulting area value.

We consider a hipped roof

Then you should determine how difficult each of them is.

The simplest has a pyramidal shape.

Therefore, when calculating its surface, the formula for the pyramid is used.

If all the slopes are the same size, then it is enough to calculate the area of \u200b\u200bone of them and then multiply by four.

In the case when it has a complex shape, then it is divided into simple figures and the surface of each of them is calculated separately.

Then the results are summed up.

But there is one subtlety: when calculating the area of \u200b\u200beach slope, it is necessary to take into account the angle of its inclination.

Indeed, for such a roof for different slopes, the angles of inclination can differ significantly.

It should also be remembered that dimensions are taken not along the perimeter of the building, but along the overhangs of the cornices.

We calculate the hip roof

In order for the calculation to be performed correctly, it is necessary to take into account the following:

window size and chimney size;
the length of the slope (between the ridge and the eaves);
details that are not included in the roofing (overhangs, parapets, etc.);
when performing the calculation, the adjoining roofing slabs, block ledges, standing folds are not taken into account.

Calculating the surface of a hip roof consists in finding the area of two end triangles and two trapezoids.

In any case, if the hip roof has a complex shape, it is divided into several simple figures and calculations are made separately for each of them.

And then the calculation results for each figure are summarized.

You should know that even though the hip roof is the best roofing solution, its installation is not cheap.

Calculation for a hipped roof

A hipped roof is one of the varieties of a hipped roof.

So let's say this is a classic roof with four slopes.

The basis of this design is a quadrilateral.

And the slopes are isosceles triangles converging at the central upper point.

Such a roof is the most economical, since there are no gables in it.

Since the slope is equal to an isosceles triangle, then:

b is the length of the base of the triangle;

h - height;

S is the area of the triangular slope.

Calculation of a broken mansard roof

The area, despite the apparent complexity, is quite simple to calculate.

To do this, first of all, make a roof plan indicating all dimensions.

The entire roof will be a set of simple geometric shapes: triangles, squares, rectangles, trapezoids.

For a square: a x a.

a is the length of the side.

For a rectangle:

In this formula:

a is the length

b is the width of the figure.

For a triangle:

In this formula:

a - the base of the figure,

and h is its height.

For a trapezoid:

h x (a + b) / 2.

h - the height of the figure,

a and b are the dimensions of the upper and lower bases.

After the area of \u200b\u200beach of the simple figures into which the broken mansard roof is divided is calculated, the results are summarized.

Video about the construction calculator for calculating the roof.

Sergey Novozhilov is an expert in roofing materials with 9 years of practical experience in the field of engineering solutions in construction.

One of the main tasks in drawing up a plan for the construction of houses is the correct calculation of the roof area. This article will help you make the right calculations, determine what needs to be removed first, as well as how to make calculations for various roofing.

We calculate the area of the roof

The most common question that developers ask is how to make the correct calculations and at the same time take into account the shape of the roof itself, this task also seems to be quite difficult if there are many complex structural elements in the roof structure.

To accurately calculate the area of the roof, the following steps are necessary:

The overall calculation should include various elements (vents, roof windows, chimneys);
Accurately calculate the roof slope from the cornice itself to the bottom mark of the ridge;
The calculations should also take into account: overhangs, possible railings, firewall walls, and more;
Initially, it should be taken into account for which specific material the area is being calculated;

Please note that roof tiles and roll materials reduce the length of the slope by about 70 centimeters!

To make more accurate calculations, the entire roofing area should be divided into various geometric shapes (squares, triangles and trapezoids), then each element should be measured separately, and in the end, by adding all the necessary indicators, the total roofing area is obtained.

After all the calculations made, the slope of the roof relative to the ground should also be determined. This is done by multiplying each part by the cosine of their angle of inclination.

Important! With a fairly simple roof structure, for example, a gable roof slope of only 30 degrees, your task is simplified. For such calculations, it will be enough to multiply the cosine by the area of \u200b\u200bthe slope.

If you need calculations on more complex roofs, we recommend using calculator programs, they reduce the risk of a possible error, which can lead to further problems in operation.

Factors to be taken into account when calculating the area of \u200b\u200broofs

For a correct calculation, it is imperative to take into account the type of this roof itself.

So, for example, for roofs of the combined type, often used for buildings of an economic type, the area is calculated by multiplying the length of the building by the width.

For residential buildings, as a rule, attic and attic types of roofs are used. These types require much more complex calculations, due to differences in designs - multi-pin, gable, flat, hip, four-slope, etc.

The roof area in this case begins with finding the angle of inclination, which, in turn, depends on the local climate from about 11 to 70 degrees.

Area calculation

Before making all the necessary calculations, it is necessary to take into account some particularly important factors, for example, the features of each individual roof structure. Some options, it is wiser to calculate not in square meters. meters and sheets or pieces. But for an accurate calculation of materials in sheets, it is necessary to have accurate data on the slope and height of the roof. In the calculations, in this case, the most elementary formula is used.

And for a galvanized or soft roof, a completely different, more complex calculation is applicable:

S = (2 x a + b) x (2 x a + c) / cos (m)

S - in this case, the roof area, c and b the width of the house and its length, a - the width of the overhang, m - this is the slope angle. The indicators in this formula must be taken with a slope orientation.

You should also carefully read the calculation of the roof for various roofing options.

For the correct calculation of the required number of slate sheets, simple mathematical formulas should be applied, taking into account only the length, width and overhang of the roof.

The calculation formula in this case looks like this:

The total roof area is 2 x (overhang width + building length) x (2 x overhang width + house width) / cos (slope angle).

Copper roofing

For example, roof size - 10 by 15 meters, slope angle - 30 degrees, and overhang - 0.5 meters, the area is (2x0.5 + 15) x (2x0.5 + 10) / cos (30) = 16 x 11 / 0.87 = 202.2 square meters.

The metal tile also has its own characteristics. Before working with this material, the following must be considered:

Overall length, valleys and overhang,
the width and length of the building,
how many spines are there
the sum of their lengths.

In addition, when calculating the roof area, it is necessary to take into account the type and number of slopes.

Flexible and soft materials should be calculated using the following calculation formula: Roof area = (2x building length + eaves width) x (2x building width + eaves width) / cos (slope angle). How much material you need for coating depends on the type of tile used. Also, do not forget that the area of \u200b\u200bvalleys and skates should be calculated separately.

The following rules are used to calculate soft pavements:

- All structural elements should be taken into account;
- An additional calculation of the truss system and the height of the roof may be required;
- It should also take into account the overlap of skates, overlap and overhang of the eaves;

for example: building size 5x10 meters, inclined angle - 45 degrees, overhang width - 0.5 meters, area in this case \u003d (2x0.5 + 10) x (2x0.5 + 5) / cos (45) \u003d 11 x 6 / 0, 70 = 94.2 square meters.

Environmentally friendly, natural materials for the roofs of buildings today are quite popular.

For example, wood types of materials, these include: gon, shipdel or shingles, in essence it is the same tile, but made of wood, the usual dimensions of which are 40x (9-10) centimeters.

If you decide to opt for this particular type of coating, you need to take into account that for just one square meter of the surface used, you will need about 80 elements, and the wood tiles are laid in three layers. In order to calculate the amount of material per roof, use the standard formula using the area of \u200b\u200bthe figures.

When covering the roof with corrugated board, we still advise you to seek professional help, since when working independently, there is a high probability of inaccuracies. With independent calculations, one should take into account the type of slopes and their number.

Important! When calculating an elementary gable roof, you should use the multiplication of the width by the length. Since the width is calculated by the ridge, the result should be multiplied by two.

For roofs with more complex structures, calculations are carried out for each of the slopes separately. How much material you need depends on the characteristics and dimensions of the corrugated sheets.

The following should be taken into account:

The dimensions of the roof structures, together with the available openings;
Overlapping of skates and overhangs;
Overlap size.

Hip roofs are a type of pitched roof, usually made in the form of a tent or tent. In this case, the total roofing area should be calculated taking into account the area of \u200b\u200bseparate, small areas, there are four in total: two trapezoidal and two hip, triangular. The calculation of such a hip roof is considered to be one of the most difficult, therefore, for the most accurate implementation, it is recommended to use calculator programs.

Important: before cutting the individual elements of the roof covering, be sure to carry out all the necessary calculations of the covering.

The procedure for calculating the roof area

You should also take into account what types of tools you may need in the calculations.:

roulette;
calculator;
Roof project with all necessary details;
It is also a good idea to have a specialized calculator program with you.

Before starting the calculations, be sure to consider what kind of material you will use to cover the roof. To simplify the calculations, it is necessary to divide the total coverage area into conditional geometric shapes.

Roulette should measure all the parameters necessary for the calculations.

Slope coefficients are calculated from the following values and parameters:

With a slope of 9 degrees (2-12 or 1:6) - 1.01 (coefficient);
with indications of 14 degrees (3-12 or 1: 4) - 1.03;
with indications of 18 degrees (4-12 or 1: 3) - 1.05;
with readings of 23 degrees (5-12 or 1: 2.4) - 1.08;
with readings of 27 degrees (6-12 or 1:2) - 1.12;
with indications of 34 degrees (8-12 or 1: 1.5) - 1.2;
with readings of 40 degrees (10-12 or 1: 1.2) - 1.3;
with indications of 45 degrees (12-12 or 1: 1) - 1.41;
with indications of 49 degrees (14-12 or 1: 0.86) - 1.54;
with readings of 53 degrees (16-12 or 1:0.75) - 1.67;
with readings of 56 degrees (18-12 or 1:0.67) - 1.8.

In cases where the roof of a building has a more complex structure, and many different elements are located on its surface, for example: skylights, ridges, various ledges, etc., the geometric design of the roof should be more carefully worked out. All necessary measurements are usually carried out directly on the surface of the roof itself. You can also make calculations from the attic or from the ground.

Before calculating the area as a whole, it is necessary to carefully measure the individual geometric elements into which the roof is divided.

When calculating the area, do not forget to take into account the slope, because different coefficients are required for different indicators.

Remember! After making all the necessary calculations, it is recommended to add 10% to the resulting indicators, this is done so that, with possible errors in the calculation, you have a supply of material to cover them.

To reduce the risk of errors, experts strongly recommend using professional programs for area calculations. In this way, you can minimize possible risks and errors in calculations.

It is possible to perform the necessary calculations of the area on your own, during the construction of the roof of the building. It is important to carefully check all the calculations and indicators.

What data is important and where to start the calculations

Calculation of the area of \u200b\u200ba single-slope structure
Calculation of the area of \u200b\u200ba gable structure
Calculation of the area of four-slope structures
Mansard roofs and features of complex calculations
Help online calculators

The construction of any house, regardless of its quadrature, number of storeys and fashionableness, begins not with a foundation pit and foundation, but with drawing up a project and calculations, among which the roof is among the most significant and requiring increased accuracy. It is also considered one of the most important elements of the building, and performs two important functions at once:

protective, because it is she who will cover your home from moisture, precipitation, cold, i.e. provide warmth and comfort in the room;
aesthetic, giving completeness and expressiveness to the exterior, making the structure interesting and presentable. Even the most primitive “box” of a house, with unremarkable walls and without original additions (a beautiful porch, a fashionable terrace), a well-chosen roof of an interesting design can easily be turned into a real masterpiece of design art.

But it will turn out this way only if you have chosen the most suitable shape, you know how to calculate the roof area of the house and perform other calculations, you have not made inaccuracies in measurements and mathematical operations, you have professionally realized your wishes.

What you need to consider when calculating the roof area of \u200b\u200bthe house

Understanding how to calculate the roof area of a house, knowing the area of \u200b\u200bthe house, will come in handy, first of all, in order not to be mistaken in the amount of material needed for construction. The more accurately they are fulfilled, the higher the chance to avoid unnecessary financial costs.

To begin with, decide on the type of roof being built, because there are many modern architectural solutions: there are simple and complex, the same type and combined - for every taste, if only the appearance of the building was unique and irresistible. Today there are different forms:

lean-to;
gable;
four-slope;
attic;
hip;
tented.

The form chosen for the arrangement of the roof is always reflected in the construction project. When performing calculations, they also pay attention to what kind of roofing material will be covered (slate, metal tiles, etc.).

Directly to determine the total quadrature, you will need to take data such as:

the height of the ridge run (ridge);
slope length;
angle of inclination of pitched planes;
house parameters (width, length);
the size of the overhangs (pediment, cornice).

How to determine the quadrature of the simplest type of roof

The easiest way is to find out the area of \u200b\u200ba shed structure, which is usually chosen to cover outbuildings (barn, garage, pet breeding facilities).

The shape of the pitched plane is the simplest - it is a regular rectangle, respectively, the area is equal to the length multiplied by the width, while the value of the gable overhang and the eaves must be added to each side (you can take the standard half a meter).

How to calculate the roof area of \u200b\u200bthe house: gable structures

For residential buildings and cottages, gable structures are most often chosen, this option is often called "classic". There will also be no problems with how to calculate the roof area of \u200b\u200ba house with a calculator, because. all calculations are based solely on the simplest basics from the trigonometry course studied in high school. Initially, the area of \u200b\u200bthe pitched plane is determined, and then the resulting value is multiplied by "2", because. there are two slopes in the design. But if the project provides for the construction of pitched planes with different sizes, then the areas of each of them are calculated separately and summarized.

For a visual representation, you can consider one of the calculation examples, for which we need the following initial data:

the length of the house (let's say it is 10 meters);
the length of the slope (it is also equal to the length of the rafter leg and, suppose, was 5 meters);
the value of the gable and cornice overhang (we will take the standard ones, 0.5 meters each).

Substituting all the values \u200b\u200binto the formula, we get that the area of one pitched plane is:

S \u003d (10 + 2 * 0.5) * (5 + 0.5) \u003d 66 sq. meters.

Considering that there are two slopes, we double the value obtained, as a result we determine that the roof area will be 132 square meters. meters.

As a rule, any design contains chimney pipes and ventilation duct outlets, and can be equipped with windows. But their dimensions do not subtract from the obtained area.

How to calculate the roof area of \u200b\u200bthe house: features of four-slope structures

Today, for the construction of the roof of a residential building, it is fashionable to choose four-pitched structures. Most often, if the dimensions of the building are proportional and form a square, the roof is made in a pyramidal shape. This variety is called "tent", in this case, each slope is an isosceles triangle, they are all connected at the top at a single point, and the base is a quadrangle. In this case, how to calculate the area of the hipped roof of a house with a calculator will not cause difficulties, because. you can apply a formula that involves calculating the area of \u200b\u200ba triangle, then multiplied by "4". To find it, you need to multiply the width by the height and divide the result by "two". Let's say we have the following data:

the width of the base of the triangle is 8 meters;
slope height 5 meters.

It is very important to take into account for this calculation that measurements are taken not along the perimeter of the structure, but along the cornice overhangs. Also, do not forget that the angle of inclination of the sloped planes must be taken into account in the height of the slope.

When figuring out how to calculate the roof area of \u200b\u200ba house with a four-pitched roof, you may be faced with the need to find calculations for a more complex structural variety called "hip". This is also one of the most popular solutions today used for the design of residential buildings, country cottages. This design consists of two end sides, having the shape of isosceles triangles, and two side, made in the form of trapezoids. The principle of calculation is based on determining the areas of a triangle and a trapezoid, multiplying each obtained value by "2" and then summing it into a total result.

As already discussed, to find the area of a triangle, you need to multiply the width by the height and divide the result by "two". In the case of a trapezoid, it is also necessary to use the provided formula, in which the bases are summed up, the result obtained is divided by "two", and then everything is multiplied by the height of the pitched plane.

For a hip structure, it is imperative to pay attention to the presence and size of windows, chimneys, overhangs, parapets.

How to calculate the roof area of a house: features of attic structures

The attic type is among the undisputed leaders in popularity. It is characterized by a sloping "broken" roof, which consists of two parts. The top in this case is gentle, and the bottom is steep, which allows you to form a spacious and roomy attic space, which is commonly called the "attic".

When figuring out how to calculate the roof area of a mansard roof house, at first glance it may seem that it is too difficult to do this, but in fact the principle will be clear even to a non-specialist. First you need to draw up a design plan with a clear indication of all known sizes, and then simply break it down into the simplest geometric shapes, the areas of which are still found in the school curriculum in geometry lessons:

the square has S = a * a, where a are the sides;
the rectangle has S = a * b, where a and b are also sides (length and width);
the triangle has S = a * h / 2, where a is the size of the base, h is the height of the figure;
the trapezoid has S = (a + b) * h / 2, where a and b are the upper and lower bases, h is the height.

Having received the values \u200b\u200bof simple figures, they are summed up, and the final result will be equal to the total area of \u200b\u200bthe roof. At the same time, do not forget that there are two pitched planes, and it is necessary to summarize the quadrature of the simple figures of both sides.

Also, always remember that all measurements must be taken from the extreme point of the eaves to the ridge. When measuring the bases, always add a margin to the eaves and gable overhangs, leaving at least half a meter on them.

Construction online assistants

Thanks to the limitless possibilities of the Internet, in our time it is possible to cope with the task much easier and faster, because. such a convenient tool as an online calculator was invented, and anyone can calculate the area of \u200b\u200bthe roof of a house with its help.

To perform settlement actions, it is enough to go to the site and enter the data requested for computing operations in a special form. Further, the system itself performs calculations and produces the finished result.

Online construction programs are offered paid and free, there are those provided for the most primitive calculations and more complex ones that work online or require installation on a computer. Of course, if you are building a simple structure, then such a calculator will be invaluable help in preparing an estimate of the cost of purchasing materials.

When erecting more complex, combined forms, which are complemented by skylights, need, hatches, chimneys, ventilation outlets, you can seek the advice of a specialist (their services are also offered online). In addition, we should not forget that the consumption depends on the type of roofing material chosen.

Only 100% correct calculations of the roof area of the house will allow you to avoid unnecessary costs when purchasing materials for roofing and at the same time will not allow you to face their shortage in the process of work, which means that nothing will prevent you from completing the coverage on time and settling in as quickly as possible. new cozy and beautiful house!

Note information: , .

The roof is one of the main elements of the roof, which takes on all the impacts coming from the atmosphere.

The main function is to drain water and disperse the load on the top of the building after snow falls.

High-quality roofing is valued for long-term operation and a pleasant appearance.

Roof calculation online (calculator with drawings) - will help you make a reliable calculation of the amount of roofing, rafters and battens.

In construction, there are several types of coatings, which in turn are further divided into subspecies. The most common building surfaces are flat(sometimes operated and non-operated) and attic(this includes a whole group of roofs:, conical and others). Without a doubt, when it comes to choosing the type of roof, a further definition of the surface material becomes relevant.

The most popular types include:

, aluminum seam and other metal roofs;
slate coating;
roof made from natural materials.

Roofing materials

As part of the truss system includes many construction "spare parts", but the main ones in this wide list are:

slopes (inclined planes),
crate,
rafters,
mauerlat bar.

In addition, a gutter, aerator, drainage pipe and others take a certain role in the process of shelter and further functioning of the shelter.

The truss system is represented as a carrier system, which is based on inclined rafter legs, vertical racks, as well as inclined struts. In some cases, it becomes necessary to use rafter beams, which will “tie” the rafter legs. There are hanging and layered rafters. In the first group, trusses with sleepers are separately distinguished.

Roof device

The next layer in the design of the mansard roof is the crate, which is laid over the legs of the truss system. Thus, a certain foundation for the roofing deck appears, and the spatial component of the eaves also expands significantly. Most often, this element is made of either wood or metal.

Mauerlat also adheres to its niche of responsibility. It acts as a support for the rafters along the edges., and lay it on the outer wall around the perimeter. The beam is usually lumber (tobish made of wood), but it is quite reasonable if, in the case of a special metal frame, similar contents will be used to prepare the Mauerlat.

Roof calculation online calculator

How to calculate the roof of a house and how to calculate the material for the roof quickly and without errors? In this one, you can use a specially designed service - a construction calculator for calculating the roof of a private house. The calculator calculates the amount, weight, and more.

Calculator field designations

Specify roofing material:

Select a material from the list -- Slate (corrugated 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) 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 tile (25 kg/m2) Ondulin (Euro slate) (4 kg/m2) Composite tile (7 kg/m2) ) Natural slate (40 kg/m2) Specify the weight of 1 square meter of coating (? 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.

Snow load region

Explanation of calculator fields

Loads acting on the roof

It is likely that when it comes to choosing the type of roof and roofing, one should be guided by more than just visual requirements. First of all, it is necessary to pay attention to studying the issue of the load on the hip.

NOTE!

The roof is affected not only by precipitation and their volumes- temperature instability and various causes of physical and mechanical origin also exert serious pressure on the surface.

There are many reasons and sources of influence, but the leading ones are snow and wind. What can we say, if building codes require mandatory calculations for a future canopy. The calculation has a pronounced individuality in view of the differences in the volume of snow cover that falls in a particular region.

The wind load is not as harmless as it might seem at first glance. In some cases, we have to talk about the load due to the weight of one of the elements of the hip. Most often, the crate or roof acts as a weighting agent.

The topical issue of load is faced by those who is going to use the attic space all year round. In this case, large-scale insulation is necessary (slopes, side walls, etc.), which leads to a significant increase in the pressure force on the surface of the walls. When the attic is not planned to be transferred to a living space, then only one floor needs to be insulated.

The load-bearing structure of the eaves can also exert a noticeable load due to its own weight. In this situation, the load indicators are determined taking into account the average density of materials and the design values of the parameters of a constructive and geometric nature.

All of the above factors of influence are not so easy to analyze, but fortunately, all the necessary SNiPs have long been developed, the norms of which can be consulted at any time.

Cover area calculation

Inevitable in any canopy design. If a the surface of the house will be displayed in a shed plane, then you are very lucky with the calculations.

In such conditions, measure the length and width of the structure, add up the indicators of conditional overhangs and then multiply the two results one by the other.

When it comes to the roof, then several more positions should be used in the calculation, including the angle of inclination of one or another element. First of all, we recommend dividing all capacious parts of the coating into certain parts (for example, into triangles).

In the case of a gable surface, the area of each inclination should be multiplied individually by the cosine of the oblique angle. The slope angle is a figure taken from the intersection of the slope and the floor. As for measuring the length of one inclined, the mentioned parameter should be fixed at the available distance from the ridge to the edge of the eaves.

Roof area calculation

Therefore, the solution algorithm in all projects that use pitched eaves is similar. Upon completion of the marked actions, in order to find out the area of \u200b\u200bthe house dome, you will need to sum up the results obtained.

At construction warehouses and in related stores, slopes with the shape of an irregular polygon can be sold. In this case, remember the advice that has already sounded in the material - divide the plane into identical geometric shapes and, after completing the calculations, simply add them together.

Calculation of the amount of materials for the roof on the example of metal tiles

The metal tile should begin to be considered from the angle of inclination, which was already mentioned in the previous paragraph. If we talk about extremes, then there are all theoretical grounds for saying about 11-70 degree interval. That's just practice, as you know, makes its own adjustments and they do not always coincide with theory.

Experts claim that 45 degrees is the optimal angle of inclination.

Especially when it comes to the roof of the house, which is located in an area with minimal rainfall, which does not require significant slopes. If snow is a fairly frequent visitor, then 45 degrees will be the best option, but because of the increase in wind pressure, it will be necessary to strengthen the crate and truss system. In addition, the greater the slope, the more material will go to the eaves.

Consider the calculation algorithm using the example of a gable roof:

Let the oblique angle be expressed by the letter A, and ½ of the covered span - B, the height will be H.
We introduce an action to find the tangent, which is solved by dividing H by B. We know the mentioned values, therefore, using the Bradis table, we find the value of the angle of inclination A through the arc tangent (H / B).
It is better to use a calculator that can calculate inverse trigonometric functions to solve such serious actions. Then, multiplying B by the length of the cover, we find the area of \u200b\u200beach inclination.

Regarding material costs, such calculations are already addressed at the final design stage. First you need to calculate the surface area that will be laid and directly the dimensions of the roofing material. Let's take a metal tile as an example.

roof area

So, the parameter of the real width is 1180 mm, the effective one is 1100 mm. Now we turn to calculating the length of the coverage of the house, which we have already talked about. Since we are analyzing a fictitious calculation as an example, let the mentioned indicator be equal to 6 meters.

We divide this number by the effective width and get 5.45. The decision of the action displays the number of sheets needed, and since the number is not an integer, for obvious reasons, we round it up.

Thus, we need 6 sheets of metal tiles for flooring one row along the length of the eaves. We proceed to the calculation of the number of sheets vertically.

To measure the vertical row, the size of the overlap should be taken into account (usually taken as 140-150 mm), the distance between the ridge and the cornice, as well as the length of the cornice overhang.

Let the distance be 4 meters, and the overhang - 30 cm. Having made a simple addition, we get a size of 4.3 meters. Let's take the conditional length of a metal tile sheet as 1 meter. Taking into account the overlap, the effective length of one roofing unit will be 0.85 m.

After that, we divide the result of 4.3 m by the effective length and at the end we get 5.05 sheets. In such a small deviation from a whole number, we advise you to round down.

Calculation of steam and waterproofing

- and it is considered very simple. To do this, you just need to divide the covered area by the same parameter of the roofing deck. For example, we are talking about a gable canopy.

Conventionally, we take a slope length of 5 meters and a width of 4 m. Therefore, the area of \u200b\u200bone unit is 20 square meters. m, and the total figure for two slopes will be 40 square meters. m. Steam and waterproofing material is considered to be in rolls.