Calculate the volume of the roof of a triangular triangle. Online calculation of a gable roof - truss system. Hip and hip roofs
Online calculator gable roof will help you calculate the angles of the rafters, required amount lathing, the maximum load on the roof, as well as the materials necessary for the construction of a roof of this type with a given size. You can calculate the roof from such popular roofing materials as slate, ondulin, ceramic, cement-sand and bituminous tiles, metal tiles and other materials.
The calculations take into account the parameters given in the TCP 45-5.05-146-2009 and SNiP "Loads and Impacts".
A gable roof (also known as a gable or gable roof) is a type of roof that has two sloping slopes that run from the ridge to the outer walls of the building. This is the most common type of roof today. This is explained by its practicality, low construction costs, effective protection premises and aesthetic appearance.
The rafters in the construction of a gable roof rest on each other, connecting in pairs. On the end side, gable roofs have the shape of a triangle, such ends are called gables or gables. Usually, an attic is arranged under such a roof, which is illuminated with the help of small windows on the gables (attic windows).
When entering data into the calculator, be sure to check the additional information marked with the icon.
At the bottom of this page, you can leave feedback, ask your own question to the developers, or suggest an idea to improve this calculator.
Explanation of calculation results
Roof slope
At this angle, the rafters and roof slope are inclined. It is understood that the construction of a symmetrical gable roof is planned. In addition to calculating the angle, the calculator will inform you how the angle corresponds to the standards for the roofing material you have chosen. If you need to change the angle, then you need to change the width of the base or the height of the roof, or choose a different (lighter) roofing material.
Roof surface area
The total area of the roof (including overhangs of a given length). Determines the amount of roofing and insulation materials that will be needed for the work.
Approximate weight of roofing material
Total weight roofing material necessary to completely cover the roof area.
Number of rolls of overlapping insulation material
The total amount of insulation material in rolls that will be required to insulate the roof. The calculations are based on rolls 15 meters long and 1 meter wide.
The maximum load on the truss system. The calculations take into account the weight of the entire roofing system, the shape of the roof, as well as the wind and snow loads of the region you specify.
Rafter length
The total length of the rafters from the beginning of the slope to the ridge of the roof.
Number of rafters
The total number of rafters required to build a roof with a given pitch.
Minimum section of rafters, Weight and Volume of timber for rafters
The table shows the recommended cross-sectional dimensions of the rafters (according to GOST 24454-80 Softwood lumber). To determine compliance, the type of roofing material, the area and shape of the roof structure, as well as the loads exerted on the roof are taken into account. The adjacent columns show the total weight and volume of these rafters for the entire roof.
Number of rows of battens
The total number of rows of sheathing for the entire roof. To determine the number of rows of crates for one slope, it is enough to divide the resulting value by two.
Uniform spacing between boards
To install the battens evenly without overspending, use the value shown here.
Number of batten boards in standard length
To batten the entire roof, you will need the number of boards indicated here. When calculating, a standard 6-meter board length is used.
The volume of boards of the crate
The volume of boards in cubic meters will help you calculate the cost of the cost of the crate.
Approximate weight of batten boards
Estimated total weight of the boards of the crate. The calculations use average density and moisture values for softwood.
Specify the required dimensions in millimeters
X- house width
Y- roof height
C- overhang size
B- roof length
Y2- additional height
X2- additional width
Reference
The program is designed to calculate roof building materials: quantities sheet material(ondulin, nulin, slate or metal tile), roofing material (glassine, roofing material), the number of boards of the batten and rafters.You can also calculate some useful dimensions of the roof.
The program works in two modes: in the mode of a simple gable roof and a roof with two side gables (side roofs), type 1 and type 2.
Attention! If you have a roof with one side gable, then use type 1 for the calculation, then type 2. And from the data obtained, calculate the amount of building materials: rafters, sheathing boards, roofing and sheet materials.
Otherwise, there may be an error in the calculation. After all, the program takes into account cutouts in the main roof under the roofs of the side gables.
In the calculation, you will see several numbers: the size or volume of the building material of half the roof and in brackets - the full size or volume.
In the calculation of an additional roof - the full size and volume, and in brackets are two numbers: the size and volume of one and two additional roofs.
Attention! When calculating sheet roofing material, consider what the program calculates by the roof area.
For example, 2.8 rows multiplies 7.7 sheets per row. In real construction, 3 rows are laid.
For a more accurate calculation of the number of roofing sheets, it is necessary to reduce the height of the sheet in the calculation until an integer number of rows is obtained.
Don't forget to set the amount of overlap more accurately.
When calculating the material volume of the main roof rafters, in type 2 mode, the program does not take into account the cutout for the side gable. This is due to some implementation difficulties in the program.
Maybe I will solve it in the future.
However, excess rafter material is unlikely to disappear or make some adjustments to your calculations.
There will also be a separate program for a more intelligent calculation of sheet roofing materials.
And don't forget to buy Construction Materials need with some margin for waste.
Calculating the area of the roof, for those who know how to use a tape measure and a calculator, will not be difficult. Because the whole calculation comes down to calculating the areas of individual slopes, and if the roof of the house is not complicated, but the usual two- or four-slope, then it will be even easier to calculate the area.
There are a huge variety of types and geometric shapes of the roofs of private houses, but the roof slopes themselves, as a rule, come in four geometric shapes:
- rectangle
- trapezoid
- equilateral triangle
- parallelogram
In this article, we will only consider the area 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 its part located 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 figures, trapezium and rectangle by 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 less area 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 than harder roof, the more you will have unnecessary scraps. 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 correctness of the calculations when planning a new construction or repair can significantly save on basic and consumables. Roofing cake is one of the key components of the house. In the process of its design, you need to know how to calculate the area of \u200b\u200bthe roof, be able to calculate the area of each of its elements. For this, there are special computer programs. But, unlike the machine, the calculation "manually" gives a more accurate result, since it allows you to take into account the nuances of further laying of the roofing material.
Geometric roof shapes
The variety of geometric shapes of the top of the house determines the complexity of the calculation of its area. The most common stingray figures:
- rectangle,
- trapezoid,
- isosceles triangle,
- parallelogram.
It is quite simple to calculate the roof area if it has one, two or four slopes. The more elements - the more difficult, the more measurements and mathematical operations need to be done.
The calculation can be done in two ways:
- Make calculations based on the plan of the top of the cottage. Everything must be written on it. linear dimensions every slope. It remains only to calculate the area of \u200b\u200beach element and find their sum.
- Take "live" dimensions from the already finished roof and perform mathematical operations. This option is more accurate, since an absolutely exact match between the actual dimensions of the top and its plan is very rare.
In both cases, you need to pay attention to symmetrical slopes. First of all, this applies to the elements of a two- or four-pitched roof.
Calculation of the area of \u200b\u200bone- and gable roof
These two types are the simplest, since the slopes of the single-slope and gable tops of the house usually have a rectangular shape. The calculation of their area can be performed even without a detailed plan. It's also fairly easy to take measurements.
Square shed roof equals the area of one roofing rectangle:
A and B are the width and height of the slope, respectively.
These parameters can be found even without climbing to a height. It is enough to find out the length and width of the house and add the overhangs of the top of the house to them. Next, you need to measure the height of the roofing pie itself and, using the Pythagorean theorem, calculate its length. Now you can multiply the obtained parameters and get the desired result.
According to a similar scheme, the area of \u200b\u200ba gable roof is calculated. It can always be imagined as two sheds. Accordingly, and similarly, the dimensions of this type of roof are taken. If the slopes are symmetrical, you can remove the parameters of only one of them. Knowing the length, you can calculate the area of \u200b\u200bthe pediment of a gable roof, especially if it is planned to be lined with wall decking or siding.
The result for each roof element is determined by the same rectangle area formula:
Having learned the area of both elements, by their usual summation, it is calculated general meaning for double slope roofing.
Calculation of the area of hip, hip and semi-hip roof
These roof options have a more complex configuration, so in order to calculate the area mansard roof more time is needed. All of them are four-slope, which means that more measurements need to be taken.
A kind of roofing surface, composed of two trapezoids and two triangles, is called a hip. In most cases, its opposite sides are equal, and the triangles are isosceles. For such a symmetrical hip roof, it is enough to calculate the value for only two neighboring elements and multiply the result by two. If the dimensions of each of them are different, you will have to measure the entire roof.
After the measurements, you can calculate the value for each element. For trapezoidal elements, you need to use the following formula:
a - width along the lower overhang,
b - ridge width,
h is the height.
For triangular elements, the formula is applied:
a - the width of the slope along the lower overhang,
h is the height of the slope.
Well, at the end, as in the previous cases, the sum of the results of the calculation of all elements is calculated.
The half-hip design differs from the hip design in that instead of trapezoidal elements, it has hexagonal elements, the lower part of which is in the form of a rectangle, and the upper part is trapezoid. Accordingly, the measurement process is slightly different. In a hexagonal element, you need to measure its two components separately, and also do the calculations separately. The formulas can be viewed a little higher in this article. Again, the total area of the half-hip roof is the sum of the results of the calculation of all its elements.
The traditional tented top is made up of four isosceles triangles. Usually it is symmetrical, so measurements can only be taken on two adjacent elements. It is only necessary to find out the height of each of the slopes and their width along the lower overhang. Further, according to the formula given just above, each element is calculated and the final calculation of the hipped roof is made.
Calculation of roof area with slopes with complex geometry
Multi-pitched roofs with elements with complex geometry no longer surprise anyone. These are the so-called dome and multi-gable structures. These solutions for the top of the house are very attractive. It is much more difficult to calculate the roof area of \u200b\u200bsuch a configuration than in the case of conventional four-slope options. But an accurate calculation is necessary, since there are a large number of rays, each of which has different shape. The construction of such structures is quite expensive and the slightest mistake will inevitably lead to additional expenditure of money and time.
The main difficulty in the process of calculating a multi-pitched roofing surface is the stage of sizing, and the more elements in the structure, the more difficult it is to make measurements. Here you can not do without lifting to the roof. In any case, it is necessary to make a drawing of the roof and measure each slope. For each of them separately, it is necessary to calculate the area using the formulas given above, then, summing up the data obtained, find the total roof area.
The issue of calculating the area of \u200b\u200bthe roof must be approached very scrupulously. After all, roofing materials are quite expensive and errors in calculations will lead to unnecessary costs. It must be remembered that when buying roofing materials, it is necessary to make a small margin, since they are overlapped, and it is not taken into account when calculating the roof area.
We calculate the roof area correctly
How to calculate roof area: Rules and formulas.
How to correctly calculate the area of \u200b\u200bthe roof
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: angle of inclination, length of the ridge, 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.
Homes on which suit pitched roof, 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.
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, dormer and dormer windows, 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 hipped roof 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 the hipped roof has a complex shape, then it is divided into simple figures and the surface of each of them is calculated separately.
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 of the hip roof to be performed correctly, it is necessary to take into account the following:
- window size and chimney size,
- slope length (between the ridge and the cornice),
- 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 hip roof- this is the best roofing solution, its device is expensive.
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.
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Since the slope is equal to an isosceles triangle, then:
b is the length of the base of the triangle,
S is the area of the triangular slope.
Calculation of a broken mansard roof
The area of a broken mansard roof, 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.
b is the width of the figure.
a - the base of the figure,
h is 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.
Use the online gable roof calculator to calculate the number of battens, the angle of inclination truss system, loads (wind and snow) on the roof. Our free calculator will help you calculate the required amount of material for a given type of roof.
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 roofing (6 kg/m2) Polymer-sand tiles (25 kg/m2) m2) Ondulin (euro slate) (4 kg/m2) Composite tiles (7 kg/m2) Natural slate (40 kg/m2) Specify the weight of 1 square meter of coating (? kg/m2)
kg/m2
Enter roof parameters:
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:
Select your region using the map below
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 (1×15 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.
About the calculator
The online calculator for a gable roof, also called a gable roof, will help you calculate the desired angle of inclination of the slopes, determine the cross section and number of rafters, the amount of materials per sheathing, the consumption of insulating materials, and at the same time take into account existing standards for wind and snow loads. You do not have to perform unnecessary additional calculations, because this calculator contains most of the existing roofing materials. You can easily calculate the consumption and weight of such common materials as bituminous tiles, cement-sand and ceramic tiles, metal tiles, bituminous and asbestos-cement slate, ondulin and others. If you are using non-standard material, or want to get more accurate calculations, you can specify the mass of your own roofing material by selecting the appropriate item in the drop-down list of materials.
Note!
The calculator makes calculations in accordance with the current SNiP "Loads and Impacts" and TCP 45-5.05-146-2009.
A gable roof (there are variants of the name "gable roof" and "gable roof") - the most common type of roof, in which there are two inclined slopes from the ridge to the outer walls of the structure. The popularity of this type of roofs is explained by their moderate cost, ease of construction, good performance and attractive appearance.
In this design, the rafters of different slopes lean against each other in pairs and are sheathed with sheathing boards. The end of a building with a gable roof has a triangular shape and is called a pediment (the name "gable" is also found). Usually under the slopes of the roof there is an attic space, naturally lit by small window openings located at the top of the gables.
When filling out the fields of the calculator, you can find out Additional information located under the sign.
For any questions or ideas regarding this calculator, you can write to us using the form at the bottom of the page. We will be glad to hear your opinion.
Additional information about the calculation results
Roof slope
At this angle, the slope and rafters are inclined to the base of the roof. Roofing materials have individual limiting roof slope angles, so some materials may have an angle outside allowable norms. Whether your angle satisfies the selected material or not - you will find out in the calculation results. In any case, it is always possible to adjust the height of the roof (B) or the width of the base (A), or choose a different roofing material.
Roof surface area
The area of the entire roof surface, including overhangs. To determine the area of one slope, it is enough to divide the resulting value by two.
Approximate weight of roofing material
The weight of the selected roofing material based on the total roof area (including overhangs).
Number of rolls of insulating material
The amount of insulation material required to build a roof. The quantity indicated in rolls is required for the entire roof area. The standard roll is taken as a basis - 15 meters long, 1 meter wide. The calculation also takes into account an overlap of 10% at the joints.
Load on the truss system
The maximum weight per truss system. Wind and snow loads, the angle of inclination of the roof, as well as the weight of the entire structure are taken into account.
Rafter length
The full length of the rafters from the roof ridge to the edge of the slope.
Number of rafters
The total number of rafters required for a rafter system at a given pitch.
Minimum cross-section of rafters / Weight of rafters / Timber volume
- The first column shows the sections of the rafters according to GOST 24454-80 Softwood lumber. Here are the sections that can be used in the construction of a given structure. The calculator proceeds from the total loads that can affect the structure of a given roof and selects the cross-sections that satisfy them.
- The second column shows the total weight of all rafters with the specified section, if they are used to build a given roof.
- The third column shows the total volume of this timber in cubic meters. This amount will be useful to you when calculating the cost.
Number of rows of battens
The number of rows of lathing that will be needed for the entire roof with the given parameters. To calculate the number of rows of crates of one slope, you need to divide the resulting value by two.
Uniform spacing between boards
The volume of boards of the crate
The total volume of the crate for a given roof. This value will help you calculate the cost of lumber.
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 put it on outer wall along 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 actual question of the load appears before 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 
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 optimal angle tilt.
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 guest, then 45 degrees will be the most the best options, that's just 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 considered to be in rolls.
Useful video
Video instruction for calculating the roof:
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