Calculate the volume of the roof of the triangular triangle. Online calculation of a gable roof - rafter system. Hip and hip roofs
Online calculator gable roof will help you calculate the rafter tilt angles, required amount lathing, maximum load on the roof, as well as the materials necessary for the construction of a roof of this type with given dimensions. 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 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 roof type today. This is explained by its practicality, low construction costs, effective protection premises and aesthetic appearance.
The rafters in the gable roof structure rest on each other, connecting in pairs. On the front side, the gable roofs are in the shape of a triangle, such ends are called tongs or gables. Usually, an attic is arranged under such a roof, which is illuminated using 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 for improving this calculator.
Explanation of calculation results
Roof angle
The rafters and roof slope are inclined at this angle. It is understood that a symmetrical gable roof is planned. In addition to calculating the angle, the calculator will inform you how the angle corresponds to the norms for the roofing material you have chosen. If you need to change the angle, then for this you need to change the width of the base or the height of the roof rise, or choose another (lighter) roofing material.
Roof surface area
The total area of \u200b\u200bthe roof (including overhangs of a given length). Determines the amount of roofing and insulation materials that will be needed for the job.
Approximate weight of roofing material
Total weight roofing materialrequired to fully cover the roof area.
Number of overlapped rolls of insulation
The total amount of rolls required to insulate the roof. The calculations are based on rolls 15 meters long and 1 meter wide.
Maximum load on the rafter 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 specified.
Rafter length
The full length of the rafters from the beginning of the ramp to the ridge of the roof.
Number of rafters
The total number of rafters required to build a roof at a given pitch.
Minimum cross-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, and the loads applied to 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 crate
The total number of battens for the entire roof. To determine the number of rows of crate for one slope, it is enough to divide the resulting value by two.
Uniform distance between battens
Use the value shown here to install the battens evenly and avoid unnecessary overruns.
Number of battens with standard length
To frame the entire roof, you will need the number of boards shown here. The calculation uses the standard 6m board length.
Volume of crate boards
The volume of the boards in cubic meters will help you calculate the cost of the crate costs.
Approximate weight of crate boards
Estimated total weight of the sheathing boards. The calculations use the average density and moisture values \u200b\u200bfor coniferous wood.
Please indicate the required dimensions in millimeters
X - house width
Y - roof height
C - overhang size
B - roof length
Y2 - additional height
X2 - extra width
reference
The program is designed for calculating roofing materials: quantities sheet material (ondulin, nulin, slate or metal tile), roofing material (glassine, roofing felt), the number of sheathing boards and rafters.You can also calculate some useful roof dimensions.
The program operates in two modes: 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 pediment, then for the calculation use first type 1, then type 2. And already from the data obtained, calculate the amount of building materials: rafters, battens, roofing and sheet materials.
Otherwise, there may be an error in the calculation. After all, the program takes into account the cutouts in the main roof for the roofs of the side gables.
In the calculation you will see several numbers: the size or volume of the building material of half of the roof and in brackets - the full size or volume.
In the calculation of the additional roof - the total 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, take into account what the program calculates from 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, you need to reduce the height of the sheet in the calculation until you get a whole number of rows.
Do not forget to set the overlap value more precisely.
When calculating the volume of the material of the rafters of the main roof, in type 2 mode, the program does not take into account the cut for the side gable. This is due to some implementation difficulties in the program.
Perhaps I will solve this in the future.
However, the excess material of the rafters 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 what to buy construction Materials it is necessary with a certain margin for waste.
Calculate the roof area for those who know how to use a tape measure and 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 an ordinary 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 roofs of private houses, but the roof slopes themselves are, as a rule, four geometric shapes:
- rectangle
- trapezoid
- equilateral triangle
- parallelogram
In this article, we will consider the area only pitched roofs, the area of \u200b\u200bflat and inverted roofs will not be calculated, because the area of \u200b\u200bsuch roofs, in most cases, will be equal to the area of \u200b\u200bthe 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 area of \u200b\u200bthe roof.
It must be remembered that the more slopes on the roof, the correspondingly it will be more difficult not only in terms of construction, but also roof insulation, its decoration and maintenance. And during the construction itself, a lot of unused scraps will remain, which will become unnecessary financial costs.
And so, before you get out the 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 calculation of the area to a specific type.
Calculation of the area of \u200b\u200ba shed roof
This is the simplest calculation that can be done without a detailed roof plan.
It is necessary to measure the length C and width D of the ramp.
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 the width of the slope cannot be measured for some reason, then you will have to measure the height of the roof B and the projection of the slope A (according to the diagram). Then we apply the Pythagorean theorem and find the width of the slope C.
Calculation of the area of \u200b\u200bthe gable roof of the house
The calculation of such a roof, I think, will also not be difficult.
Calculation of the area of \u200b\u200bthe hip, half-hip and hip roof of a private house
To calculate, you need to mentally break the hip roof into four separate slopes, as shown in the diagram, and then calculate each slope separately.
After splitting, you should have two trapezoids and two equilateral triangles if the opposite slopes are equal.
Now let's calculate the areas of these geometric shapes 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 hip roof area a private house is considered in the same way, 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 hip roof area the house is no different from the hip one, we also break the roof into four slopes, only here you should already get four equilateral triangles. The area of \u200b\u200bthese triangles is calculated in the same way as in the previous examples.
Calculation of the area of \u200b\u200ba 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 the 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 difficult the roof is, the more difficult it will be to do it. Having an accurate roof plan can make the task easier.
Complex roof area calculation technology
First, we break the roof into separate flat slopes. As 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 \u200b\u200bthe 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 is even worse when there is not enough material, you need to contact the specialists from the company from which you will order the material. Most organizations have this service free of charge. They will very accurately calculate the number and size of the sheets and give you the layout on the roof.
Since roofing materials, as a rule, have a rectangular shape, and roof slopes are not always, the sheets will have to be cut and adjusted to the corners of the slope. And what 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 calculations when planning a new construction or carrying out repairs can significantly save on basic and consumables... Roofing cake is one of the key knots of the house. In the process of designing it, you need to know how to calculate the area of \u200b\u200bthe roof, to be able to calculate the area of \u200b\u200beach of its elements. For this, there are special computer programs... But, in contrast to the machine, the calculation "manually" gives a more accurate result, since it allows you to take into account the nuances of the further laying of the roofing material.
Geometric roof shapes
The variety of geometric shapes of the top of the house determines the complexity of calculating its area. The most common stingrays are:
- rectangle,
- trapezoid,
- isosceles triangle,
- parallelogram.
It is quite easy to calculate the area of \u200b\u200bthe roof if it has one, two or four slopes. The more elements - the more difficult, the more you need to do measurements and mathematical operations.
The calculation can be done in two ways:
- Make calculations based on the plan of the top of the cottage. Everybody must be registered on it. linear dimensions each slope. It remains only to calculate the area of \u200b\u200beach element and find their sum.
- Remove "live" dimensions from the finished roof and perform mathematical operations. This option is more accurate, since absolutely exact coincidence of the actual dimensions of the top and its plan happens very rarely.
In both cases, you need to pay attention to symmetrical slopes. This primarily applies to the elements of a two- or four-pitched roof.
Calculation of the area of \u200b\u200ba single- and gable roof
These two types are the simplest, since the slopes of the shed and gable top of the house are usually rectangular. Counting their area can be done even without a detailed plan. It is also fairly easy to take measurements.
Square shed roof equals the area of \u200b\u200bone roofing rectangle:
A and B are the slope width and height, respectively.
These parameters can be found even without climbing. It is enough to find out the length and width of the house and add to them the overhangs of the top of the house. Next, you need to measure the height of the roofing cake itself and calculate its length using the Pythagorean theorem. 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 pitched ones. Accordingly, and similarly, the dimensions of this type of roof are removed. 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 gable roof gable, especially if it is planned to be revetted with wall sheeting or siding.
The result for each roof element is determined using the same rectangle area formula:
Having learned the area of \u200b\u200bboth elements, by their usual summation it is calculated total value for a gable roof surface.
Calculation of the area of \u200b\u200bthe hip, hip and half-hip roof
These roof options have a more complex configuration, so to calculate the area mansard roof it takes more time. All of them have four slopes, which means that more measurements need to be taken.
A type of roofing surface made up of two trapezoids and two triangles is called 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 adjacent 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 taking measurements, you can calculate the value for each element. For trapezoidal elements, use the following formula:
a - width along the lower overhang,
b - ridge width,
h - height.
For triangular elements, the formula applies:
a - width of the slope along the lower overhang,
h - slope height.
Well, at the end, as in the previous cases, the sum of the results of calculating all the elements is calculated.
The half-hip design differs from the hip one in that instead of trapezoidal elements, it has hexagonal ones, the lower part of which is in the shape of a rectangle, and the upper part is trapezoidal. Accordingly, the measurement process is slightly different. In a hexagonal element, you need to measure separately its two components, and also make calculations separately. Formulas can be viewed a little higher in this article. Again, the total area of \u200b\u200ba half-hipped roof is the sum of the results of the calculation of all its elements.
The traditional hipped roof 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 know 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 the roof area with slopes with complex geometry
Multi-pitched roofs with elements with complex geometry are no longer surprising. These are the so-called dome and multi-gable designs. These topside solutions are very attractive. It is much more difficult to calculate the roof area of \u200b\u200bthis 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-slope roofing surface is the stage of sizing, and the more elements in the structure, the more difficult it is to make measurements. Here you cannot do without lifting to the roof. In any case, you need 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 roof area 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, you need to make a small margin, since they are overlapped, and this 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 calculate the roof area correctly
The construction of every house does not begin with digging foundation pits and pouring foundations.
Construction begins with project development and calculations.
With the roof, everything happens in the same way: before proceeding with its construction, 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 cake is determined.
The strength and reliability of the roof, as well as the amount of financial resources that will be spent on its device, depend on the correctness of the calculation performed.
The surface calculation always starts with:
- measurements of the main parameters of the roof: slope angle, ridge length, 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 calculation coefficient, which is used in almost all formulas for calculations.
The value of such a coefficient depends on what is the angle of inclination of the slopes in your house.
For the most popular tilt angles, the coefficient is:
- 9 degrees - coeff. 1.01,
- 14 degrees - coeff. 1.03,
- 18 degrees - coeff. 1.05,
- 23 degrees - coeff. 1.08,
- 27 degrees - coeff. 1.12,
- 34 degrees - coeff. 1.20.
If the shape of the roof is complex, of irregular 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.
Calculation procedure for a pitched roof
This is geometry from the school course.
Houses where they arrange pitched roofare usually covered with simple materials.
And the rectangle is the most common shape.
Therefore, it is enough to measure the length and width of such a rectangle and multiply them.
You should also not forget the coefficient mentioned above.
We calculate the gable roof
Calculations for the surface of a gable roof are more complicated.
And there are many more factors to be considered 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 eaves line.
Any roof with any number of slopes is calculated in the same way.
You just need to sum up the resulting surfaces of all slopes, multiplied by the cosines of their angles.
If a 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 added.
Let's see how this is done in the following example: the house measures 10 x 8 meters.
The rafters are 4.5 meters long.
Naturally, there is an overhang.
The overhang length is standard - 50 cm.
First, we calculate which surface one slope has:
S \u003d (10 + 0.5 + 0.5) x (4.5 x 0.5) \u003d 55 square meters.
Since the building has two such slopes, the total area will be 55 x 2 \u003d 110 square meters.
Despite the fact that on any roof there are ventilation ducts, chimneys, dormer and attic windows, parapets, they are not subtracted 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 of 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 the 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, the following must be taken into account:
- window size and chimney size,
- length of the slope (between the ridge and the cornice),
- parts that are not included in the roofing (overhangs, parapets, etc.),
- when performing the calculation, the abutment of roofing plates, cobbled ledges, standing seams are not taken into account.
Calculation of the surface of the hip roof consists in finding the area of \u200b\u200btwo end triangles and two trapezoids.
In any case, if the hip roof has a complex shape, it is divided into several simple shapes and calculations are performed separately for each of them.
And then the calculation results for each shape are summed up.
You should know that even though hip roof - this is the best roofing solution, its device is not cheap.
Calculation for hipped roof
A hipped roof is one of the varieties of a hipped roof.
So let's say it's a classic roof with four slopes.
This construction is based on a quadrangle.
And the slopes are isosceles triangles converging at the central top point.
Such a roof is the most economical, since the gables are completely absent 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 \u200b\u200bthe triangular slope.
Calculation of a broken attic roof
The area of \u200b\u200ba sloping mansard roof, despite the apparent complexity, is quite simple to calculate.
To do this, you should, first of all, make a roof plan indicating all sizes.
The entire roof will be a set of simple geometric shapes: triangles, squares, rectangles, trapezoids.
For a square: a x a.
a is the side length.
b is the width of the shape.
a - the base of the figure,
h - figure height,
a and b are the sizes of the upper and lower bases.
After the area of \u200b\u200beach of the simple figures, into which the broken mansard roof is broken, has been calculated, the results are summed up.
Use the online gable roof calculator to calculate the number of battens, the angle of the rafter system, and the load (wind and snow) on the roof. Our free calculator will help you calculate the required amount of material for a given type of roof.
Please indicate the 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) roof tiles (15 kg / m2) Made of galvanized sheet (6.5 kg / m2) Sheet steel (8 kg / m2) Ceramic tiles (50 kg / m2) Cement-sand tile (70 kg / m2) Metal tile, corrugated board (5 kg / m2) Ceramoplast (5.5 kg / m2) Seam roof (6 kg / m2) Polymer-sand tile (25 kg / m2) m2) Ondulin (euro slate) (4 kg / m2) Composite tile (7 kg / m2) Natural slate (40 kg / m2) Indicate the weight of 1 square meter of coating (? kg / m2)
kg / m 2
Enter roof parameters:
Base width A (cm)
Base length D (cm)
Lift height B (cm)
Side overhang length C (cm)
Length of front and rear overhang E (cm)
Rafters:
Rafter pitch (cm)
Wood grade for rafters (cm)
Side rafter working area (optional) (cm)
Crate calculation:
Sheathing board width (cm)
Sheathing board thickness (cm)
The distance between the boards of the crate
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 \u200b\u200b(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 the ridge of the building
5 m 5 m to 10 m 10 m
Terrain type
Open area Closed area Urban areas
Calculation results
Roof angle: 0 degrees.
The angle of inclination is suitable for the given material.
It is desirable to increase the angle of inclination for this material!
It is desirable to reduce the angle of inclination for this material!
Roof surface area: 0 m 2.
Approximate weight of roofing material: 0 kg.
Number of rolls of insulation with 10% overlap (1 × 15 m): 0 rolls.
Rafters:
Load on the rafter system: 0 kg / m2.
Rafter length: 0 cm.
Number of rafters: 0 pcs.
Lathing:
Number of rows of battens (for the entire roof): 0 rows.
Uniform distance between battens: 0 cm.
Number of battens with a standard length of 6 meters: 0 pcs.
Volume of crate boards: 0 m 3.
Approximate weight of crate boards: 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 for the crate, the consumption of insulation materials, and at the same time it will take into account the existing norms for wind and snow loads. You do not have to carry out 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 use non-standard material, or if you 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 TKP 45-5.05-146-2009.
A gable roof (there are variants of the name “gable roof” and “gable roof”) is 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 roof is due to their moderate cost, ease of construction, good performance and attractive appearance.
In this design, the rafters of different slopes lean on each other in pairs and are sheathed with battens. The end of the building with a gable roof has a triangular shape and is called a pediment (the name "gable" is also found). Usually, an attic space is located under the roof slopes, naturally illuminated with the help of small window openings located in the upper part of the gables.
When filling in the fields of the calculator, you can find out additional informationlocated 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 on the calculation results
Roof angle
The slope and rafters are inclined at this angle to the base of the roof. Roofing materials have individual maximum roof slope angles, therefore, for some materials, the angle may be outside the permissible limits. 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 lift (B) or the width of the base (A), or choose another roofing material.
Roof surface area
The area of \u200b\u200bthe entire roof surface including overhangs. To determine the area of \u200b\u200bone slope, it is enough to divide the obtained value by two.
Approximate weight of roofing material
Weight of the selected roofing material based on the total roof area (including overhangs).
Number of rolls of insulation material
The amount of insulation material needed to build a roof. The number of rolls indicated is required for the entire roof area. It is based on the standard roll - 15 meters long, 1 meter wide. The calculation also takes into account a 10% overlap at the joints.
Load on the rafter system
The maximum weight per rafter 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 ramp.
Number of rafters
The total number of rafters required for the rafter system at a given pitch.
Minimum cross-section of rafters / Weight of rafters / Volume of timber
- The first column shows the cross-sections of the rafters along GOST 24454-80 Softwood lumber... Here are the sections that can be used to build a given structure. The calculator proceeds from the total loads that can affect the structure of this roof and selects the section options that satisfy them.
- The second column shows the total weight of all rafters with the specified cross-section, if they are used to build a given roof.
- The third column shows the total volume of this bar in cubic meters... This volume will be useful to you when calculating the cost.
Number of rows of crate
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 the sheathing of one slope, you need to divide the resulting value by two.
Uniform distance between battens
Volume of crate boards
The total volume of the batten for a given roof. This value will help you calculate your lumber costs.
The roof is one of the main elements of the roof, which absorbs all the impacts from the atmosphere.
The main function is to drain water and distribute the load to the top of the building after snow falls.
A high-quality roof is appreciated for its long-term operation and 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 they distinguish several types of coatings, which in turn are further divided into subspecies. The most common building surfaces include flat (it can be exploited and unexploited) and attic (this includes a whole group of roofs: conical and others). Without a doubt, when it comes to choosing the type of roof, further definition of the surface material becomes relevant.
Among the most popular types are mentioned:
- , aluminum rebate and other metal roofs;
- shale covering;
- a roof based on natural materials.
Roofing materials
The structure of the rafter system there are many construction "spare parts", but the main ones in this wide list are:
- slopes (inclined planes),
- crate,
- rafters,
- bar Mauerlat.
In addition, a gutter, aerator, drainage pipe and others play a certain role in the process of shelter and further functioning of the roof.
The rafter system is presented as a supporting systembased on oblique rafter legs, vertical posts, as well as inclined struts. In some cases, it becomes necessary to use rafter beams, which will "tie" rafter legs. There are hanging and layered rafters... In the first group, trusses with sleepers are distinguished separately.
Roof device
The next layer in the construction of the attic roof is the crate, which is laid over the legs of the rafter system. Thus, a certain foundation for the roofing appears, and the spatial component of the eaves is significantly expanded. Most often, this element is made either from wood or from metal.
The Mauerlat also adheres to its niche of responsibility. It acts as a support for the rafters at the edges, and put it on outer wall around the perimeter. The timber 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 Symbols
Please indicate the 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) roof tiles (15 kg / m2) Galvanized sheet metal (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 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 / m 2
Enter the parameters of the roof (photo above):
Base width A (cm)
Base length D (cm)
Lift height B (cm)
Side overhang length C (cm)
Length of front and rear overhang E (cm)
Rafters:
Rafter pitch (cm)
Wood grade for rafters (cm)
Side rafter working area (optional) (cm)
Crate calculation:
Sheathing board width (cm)
Sheathing board thickness (cm)
The distance between the boards of the crate
F (cm)
Snow load calculation (pictured below):
Select 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 \u200b\u200b(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 the ridge of the building
5 m 5 m to 10 m 10 m
Terrain type
Open area Closed area Urban areas
Calculation results
Roof angle: 0 degrees.
The angle of inclination is suitable for the given material.
It is desirable to increase the angle of inclination for this material!
It is desirable to reduce the angle of inclination for this material!
Roof surface area: 0 m 2.
Approximate weight of roofing material: 0 kg.
Number of rolls of insulation with 10% overlap (1x15 m): 0 rolls.
Rafters:
Load on the rafter system: 0 kg / m2.
Rafter length: 0 cm.
Number of rafters: 0 pcs.
Lathing:
Number of rows of battens (for the entire roof): 0 rows.
Uniform distance between battens: 0 cm.
Number of battens with a standard length of 6 meters: 0 pcs.
Volume of crate boards: 0 m 3.
Approximate weight of crate boards: 0 kg.
Snow load region
Explanation of calculator fields
Roof loads
It is likely that when it comes to choosing the type of roof and roofing, one should be guided not only by visual requirements. First of all, attention should be paid to studying the issue of load on the hip.
NOTE!
The roof is influenced not only by precipitation and their volumes - temperature instability and all sorts of reasons of physical and mechanical origin also exert serious pressure on the surface.
There are many reasons and sources of impact, but the leading ones are snow and wind. What can we say, if building codes require compulsory calculations for the future canopy. The calculation has a pronounced individuality in view of the differences in the amount 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 hip elements. Most often, the crate or roof acts as a weighting agent.
The actual question of load appears before those who is going to use the attic space all year round... In this case, large-scale insulation is required (slopes, side walls, etc.), which leads to a significant increase in the force of pressure 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 provide a noticeable load with its own weight. In this situation, the load indicators are determined taking into account the average density of materials and the design values \u200b\u200bof the parameters of a constructive and geometric nature.
All of the above influencing factors 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.
Coverage area calculation
Inevitable in any canopy design. If a 
the surface of the house will be displayed in a sloping 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 the conditional overhangs and then multiply the two results by one another.
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 to divide all capacious parts of the coating into certain parts (for example, into triangles).
In the case of a gable surface, the area of \u200b\u200beach slope should be multiplied separately by the cosine of the slope angle. The slope is the number taken from the intersection of the slope and the overlap. As for measuring the length of one oblique, the mentioned parameter should be fixed at the available distance from the ridge to the edge of the cornice.
Calculation of the roof area
Consequently, the solution algorithm in all projects that use pitched eaves is the same. 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.
Construction yards and related stores may sell ramps with an irregular polygon shape. In this case, remember the advice that has already sounded in the material - divide the plane into identical geometric shapes and after finishing the calculations, simply add them together.
Calculation of the amount of materials for the roof using the example of metal tiles
The metal tile should 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 to say about the interval 11-70 degrees... But practice, as you know, makes its own adjustments and they do not always coincide with theory.
Experts say that 45 degrees is optimal angle tilt.
Moreover, 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 most optimal options, but because of the increase in wind pressure, it will be necessary to strengthen the crate and the rafter system. In addition, the greater the slope, the more material will go to the eaves.
Consider the calculation algorithm using a gable roof as an example:
- Let the inclined angle be expressed by the letter A, and ½ of the span to be covered - 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 arctangent (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 covering, we find the area of \u200b\u200beach inclination.
With regard to material costs, such calculations are addressed already at the final design stage. First, you need to calculate the surface area that will be laid and the dimensions of the roofing material directly. As an example, we will give a metal tile.
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 house covering, which we have already talked about. Since we are analyzing a fictional 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 required sheets and since the number did not come out whole, for obvious reasons we round up.
Thus, we need 6 sheets of metal tiles for flooring one row along the length of the eaves. Let's move on to calculating the number of sheets vertically.
To measure the vertical row, one should take into account the size of the overlap (usually taken as 140-150 mm), the distance between the ridge and the cornice, and the length of the cornice overhang.
Let the distance be 4 meters, and the overhang is 30 cm. Having made a simple addition, we get the size of 4.3 meters. Let's take the conditional length of a sheet of metal tile as 1 meter. Taking into account the overlap, the effective length of one roof unit is 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 an integer, 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 flooring. For example, we are talking about a gable canopy.
We conventionally take the length of the slope 5 meters, and the width 4 m. Therefore, the area of \u200b\u200bone unit is 20 square meters. m, and the total figure for two slopes will be 40 sq. m. Steam and waterproofing material it is customary to count by rolls.
Useful video
Video instruction for calculating the roof:
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