The roof is constructive element The buildings that are responsible for protecting from the impact of various external factors. It must be perfectly withstanding atmospheric sediments in the form of snow, hail, rain, squall winds and hurricanes. The correct bias plays a fairly large role in the rapid removal of water and snow cover from the roof. It is capable of combining with properly performed isolation to ensure the excellent protection of the entire building, including its interior.

On the roofs with a big bias of the roof (from 50ogradups), the snow will not accumulate, and will fall on the ground under the action of the force of attraction of the Earth.

Not only these indicators may depend on the competent slope of the structure, but also durability. How to determine the angle of inclination of the roof correctly, what are the factors to take into account how to make the calculation for the roofs with different coating? We hope that our material will give you answers to all questions.

About factors that affect the degree of roof angle

Types of roofs with different numbers and shapes of the skates.

Roofs have a different shape and number of skates. There are single, two and four-tight. The degree of inclination of the roof will depend on the number of available skates on country house or dacha.

The angle of inclination can be calculated on special building schedules and matrices, or with a triangle.

Construction work on the installation of the roof can pause, if it is not solved in advance, from which material it is planned to make the finish coating and what the angle of inclination will be placed. It should be remembered that these concepts will be closely intertwined, because the type of roofing material is taken into account when performing an angle calculations of absolutely any scope roof.

If the degree of the slope of the single-table design does not exceed 9-20, it will take to take into account important factors:

• the material of the finish coating;
• functional purpose of construction;
• climatic conditions.

If the roof has 2 slopes and more, not only the above factors should be taken into account, but also the area in which the construction of the house is planned. It is worth considering and what the attic room is planned for what purposes. In the event that it is provided not for housing, but in order to store temporarily not used things and objects, it makes no sense to arrange a large size room for such purposes (we are talking about the ceiling height).

When the owner plans to make a residential premises in the form of an attic from the attic, there may be a need for a good design with a big bias.

Degree angle depends on the terrain

The level of flush tiles depends on the corner of the slope of the skate.

In the regions where strong winds often pass quite often, the minimum roof slope is made. Consequently, it will have to impact wind. It should be noted that it is not recommended to do design without slope. Such covers makes sense to arrange in regions with plenty of sunny days and a small probability of precipitation.

Resistance to the wind at a high roof will be much larger than when low. However, with a very small slope, there is a possibility that the wind will fool the finish coating. Therefore, with too steep roofing there is the same danger as in roofing with a small angle. That is why it is recommended to choose such slopes of roofs:

• from 35 to 40 degrees during non-beam winds;
• 15-25 degrees with strong winds.

In the area where the sediments fall into a fairly large quantity, an angle can be increased to 60 degrees. It will be most appropriate, because it will maximize the load on the roof from melt water, snow cover and large number moisture during rain passage.

The degree of the angle of inclination of the roof should be calculated, focusing on the range of up to 9 to 60 degrees. Designers produce appropriate calculations and most often stop at the values \u200b\u200bthat range from 20 to 45 degrees.

This is attractive in that it is possible to use completely any roofing material - professional flooring, slate, metal tile and so on. Each of the materials for the finish coating will be different with its requirements that should be considered in the process of the structure of the structure.

The dependence of the angle of inclination from the material

Characteristic sheet metal tile.

If the choice fell on the use of rolled materials, when laying in 2 layers, the angle will need to do up to 15 degrees, and with three-layer laying - from 2 to 5.

You should know:

1. Use the applicable materials is suitable only in the case when the roof has a bias from 0 to 25%. In the case when the bias ranges from 0 to 10%, the material will be needed to lay in three layers. If a bias within 10-25%, you can do with one layer, but the material must have a sprinkler.
2. The slate is covered with structures that have a slope of up to 28%.
3. Tile should be used when the construct slope is at least 33%.
4. Steel coating is placed on the roof, which has a hijacking of less than 29%.

The consumption of the material will directly depend on the structure of the structure. The more, the greater the flow rate of the finish material. Flat design in this ratio will cost cheaper than roofing, which has a bias of 45 degrees.

If the owner is known for the inclination of the roof, will not be difficult to calculate the amount required material. The same thing is worth saying about the height of the roofing design.

The roof of metal tile

Wind load will have a strong negative impact on the roof. In a similar case, the calculation of the angle should be made particularly carefully. In case the corner is large, there is a possibility of bloating, which will entail an increase in the load, which can affect the entire design. In this regard, the design may be premature.

The roof, which is planned to be covered with metal tile, should have a minimum angle value - within 22 degrees.

Metal tile layers: 1 sheet steel 0.4-0.5 mm. 2 zinc coating. 3 Anticorrosion coating. 4 primer. 5 Polymer coating. 6 Protective varnish.

With this indicator, moisture accumulates can be avoided in places of coating joints. Protection against unwanted seeping of water (rain or melting snow) will occur.

If there is a need, the minimum bias of the design can be 14 degrees.If a soft tile is used as a coating, the minimum value will decrease to 11 degrees. In this case, it may be necessary to arrange an additional solid crate.

For the roof of the corrugated floor there will be 12 degrees. It is worth considering the recommendations of manufacturers about this. The angle of the slope will be determined by the owner of the construction, but it is worth remembering that the roof is calculated for temporary and constant loads.

Calculation of the angle of inclination of the roof

Calculation of the angle will depend on the height of lifting the skate. The height of the roof in the skate will be determined on the basis of the functional purpose of the attic room.

If the attic is planned to make a full-fledged mansard roomThe degree of slope should be calculated as indicated below. For example, the width of the front (roof end) will be 6 m. This figure is divided by half (6/2 \u003d 3). The height of the design in the skate is always standard as 1.8 m.

Sina \u003d A / B \u003d 3 / 1.8 \u003d 1.67

According to the Bradys table, you will need to find an approximate value that would have when Sina \u003d 1.67. This value will be within 58-59 degrees. It makes sense to stop at the maximum value of 60 degrees, which will be the desired angle of the liner of the roofing slope.

Success to you and in mathematical calculations, and in construction work!

From the slope of the roof under construction, how strong it will be reliable. The calculation of the roof inclination angle should be very accurate, because reliable protection from precipitation and negative impact ambient very important.

Types of slopes

Depending on the material, roof cladding, the angle of inclination is selected. For example, a two-layer fat construction may have a bias of four to thirty degrees, but it usually makes it 4-10 °, the roofs coated with roofing steel must have a tilt of 12-18 ° and is usually built 15 °. The angle of inclination of the roof of a slate 30-90 °, the average slope is about 45 °. There are tables in which the angles of roof slopes are indicated for different materials. The minimum roof bias is made at 3 °, in such cases it is used tool with a sprinkling or roof from zinc tapes.

Select 2 any known values, enter them.
The remaining values \u200b\u200bwill be calculated automatically.

What does it depend on?

Any high-quality design provides a good removal of atmospheric water, waterproof and enjoy resistant to fires. It should be very convenient for repair work During operation. The reliability depends on how much the structure will last, and many homeowners prefer ending systems. Low-down design has many advantages, but still the calculation of the roof shake should be calculated. Simple double and single roofs, attic or hip roofs are also popular.

Before starting installation work, accurate calculations of the angle of the slope are produced. For example, sloping roofs must have a minimal tilt, it will provide them with good tightness and it does not depend on the material of the structure.

Useful area of \u200b\u200battic depending on the angle of inclination of the roof

When choosing this indicator, you need to take into account the windiness and precipitation on the ground. In windy weather proper system It has resistance to wind gusts with a large slope, but the big angle is dangerous for the system. If the indicator increases, for example, from 11 to 45 degrees, the wind loads will increase five times. If the slope is very small, then with strong gusts of the wind, the roof breaks.

Snow cover is easier to get out products with a large inclination, at 45 degrees will be provided with full rolling of snow masses. So that under the joints of the roof the wind did not drive water, it is better to make a greater slope.

Holding an indicator, we should consider windy in the area. If there are strong gusts of the wind, it is recommended to tilt the roof by 15-20 degrees, in the area with normal indicators - 35-40 degrees. For each structure, individual calculations are made, depending both from weather in the region and from the building structure.

To make the right calculation, you need to learn how to use the brady's mathematical table.

Example calculations

The indicator of the alleged load affecting the indicator can be determined by considering the alleged loads that are calculated by taking into account the snow loads and weight of the design. The indicators of all layers of 1M 2 roofing pie are folded and multiplied by 1.1.

For calculations you need to know the thickness of the crate and insulation. For example, the thickness of the boards of the crate of 25 mm, and 1 m 2 weighs 15 kg. The thickness of the insulation is 100 mm, and the weight is 10 kg / m 2. As a material, we take ondulin, having a weight of 3 kg / m 2. So, 10 + 15 + 3x1.1 \u003d 30.8 kg is obtained.

It is difficult to imagine any roof building. The roof should protect the building from the effects of natural precipitation, have fire-resistant and waterproof properties, ensure an effective removal of atmospheric precipitation. Durability of the building and its individual elements largely depends on high-quality roof. For achievement the best results It is worth using more simple views Scanty roofs: single-sided, double, hip, semi-haired, mansard.

The minimum inclination angle of the roof of the metal tile should be 14 degrees.

Basic data

A graph of the selection of roofing material depending on the roof slope.

The permissible angle of inclination of the metal roof is usually measured with their own hands on the basis of climatic conditions The area in which construction is underway and roofing material. The minimum inclination angle should be 110 °, the maximum angle of inclination can be determined by analyzing weather conditions, it can be 45 °. and more. For a warmer and dry climate, less common roof is used. The coolest angle of inclination makes it possible to minimize the snow and, accordingly, reduce the snow load. For example, the bias of 45 ° allows almost not to consider the weight of the snow cover.

Along with this, the increased angle of inclination sharply increases the wind pressure on the roof. With a bias of 45 °, the wind pressure is more than 5 times compared with the indicator of 11 °. Therefore, for a larger angle of inclination, there is a need for more regions to strengthen the crate and rafters. The cost of the roof angle is directly dependent on its cost.

For the roof with an inclination angle of about 40-45 °, more materials are needed (about 1.5 times) than for flat roof, and for 60 ° required 2 times more roofing materials. When the configuration is selected, it is important to remember that it directly depends on the angle. Accounting to the angle of inclination allows you to determine the materials for the roof, as well as make the calculation of the layers of the roof and its area.

The materials for the roof in their properties (technical, economic, physical) were combined in group 1-11.

On the chart, they are shown by arcuate arrows. Tilt lines show slope slope. Dedicated (fat) line on the chart indicates the ratio of the total height of this skate H to half its normal attachment ½. The ratio 1/2 indicates that the vertical segment H is located on a horizontal segment ½ two times. The inclined line on a semicircular scale indicates the angle of inclination in degrees, and the scale located vertically, the roof slope in%.

So calculate the minimum bias for certain roofing materials. As an example, using this graph, we will calculate the desired angle of inclination for a given roof using a metal tile.

How to measure slope

On the schedule we are looking for an inclined line with which the arcuate arrow is joined 2. The crossing of the inclined line with the vertical scale determines the slope, the minimally allowable for this roof, which is 50%. We know that the slope of the skate is determined by the attitude of the height of the skate to half of its embezzlement. We will calculate this way:

i \u003d 10 meters (locking)

h \u003d 4 meters (skate height)

receive

i \u003d h / (1/2) \u003d 4 / (10/2) \u003d 0.8

In order to measure the slope in%, this relationship is multiplied by 100

Thus, a bias of 80%, subject to construction standards, will provide sufficient reset of rainwater from all over the area. For the roof of rolled polymer-bitumen, bitumen and mastic materials with a bias of 10 °, a protective layer is required for the main waterproofing cover from the gravel or a stone crumb, in which the frost resistance brand is not less than 100. The same protective layer is used for roof roofs with film roll materials. Corner up to 2.5%. The layer for protection from gravel should be a thickness of 1-1.6 cm, and a layer of coarse-grained sprinkle - 0.3-0.5 cm.

Moreover, on the roofs with a bias, about 2.5% using elastomeric film materials in rolls made by free masonry, we need a weighting layer of gravel at the rate of 50 kgf / sq. M.

On the roofs of bitumen-polymer or bitumen coatings in rolls with an angle of inclination above 10% of the upper layer of waterproofing is performed from coarse-grained sprinkle. On the roofs of mastic materials with an angle, more than 10% is provided for a protective layer of colorful compositions.

When creating the roof of asbestos-cement sheets, as well as professional flooring and metal tiles with a slope of up to 20% throughout the area, it is necessary to seal joints. Not more than 5%, you can deviate from small-piece materials. By producing these calculations, you can find out the area of \u200b\u200bthe indoor indoor or attic.

Units of measurement and tools

In the base of the metal design, a digital display with control elements is embedded.

The magnitude of the slope on all drawings can be designated in degrees or in percent, and it itself is denoted by the letter "I". There are currently no strict rules how to designate this amount. Unit of measurement is considered degrees or percentages (%).

The angle of the slope is measured in two ways:

1. Special inclusion.
2. Mathematical manner using computing.

The inclusion is a special rack with a frame, which has an axis between the planks, on which the pendulum is fixed, and its own division scale. When this rail is located in a horizontal position, then the pendulum on its scale is rejected to zero degrees. For the work of measuring the slope of the skate, the rail rail is perpendicular to the skate, in a vertical position.

On the scale determine the angle of deviation of the pendulum, which indicates the slope of this slope of this roof in degrees. This definition method is used very and very rarely. At the moment, many geodetic devices have been developed to determine these values \u200b\u200band special levels - bias, both drip and electronic.

Mathematical calculation

1. Vertical height (designated as h) - height from the top point of this skate (usually considered from the skate) to the lower point (the so-called cornice).
2. The lock is the horizontal gap from the lower point of this skate to the uppermost point.

The bias of the roof (its magnitude) with the use of mathematical calculation is so.

The angle of inclination of a separate scatter I is expressed through the ratio of the measured height of the roof H to the distance of the embedding L. Thus

To accurately determine this value in percent, the ratio I is multiplied by 100. Then, to determine its value in degrees, we produce interest in degrees.

For a complete understanding of this method, we give a visual calculation:

the height is equal to 3.0 m,

the la6 is 5 m.

By formula, calculate I:

We carry out the calculation of interest

Transfer to degrees. We get 31 degrees.

An online calculator of a single-table roof will help calculate the correct angle of slope of the slope, determine the section, step and number of rafters, find out the required volume of doom and other materials necessary in the construction of the roof. Calculator will help make calculations for most existing roofing materials.

Here you can make calculations of bitumen, cement-sand, ceramic tiles, metal tiles, asbestos-cement slate, ondulin and some other, less common materials. This calculator will be able to calculate the parameters of any single-sided roof, including flat. Calculator makes calculations according to existing Snip "Load and Impact" and TKP 45-5.05-146-2009.

Specify the roofing material:

Choose a material from the list - slate (wavy asbetic sheets): medium profile (11 kg / m2) Slate (wavy asbetic sheets): reinforced profile (13 kg / m2) wavy pulp-bitumen sheets (6 kg / m2) bitumen (soft , flexible) tile (15 kg / m2) from galvanized tin (6.5 kg / m2) sheet steel (8 kg / m2) ceramic tile (50 kg / m2) cement-sand tile (70 kg / m2) metal tile, professional flooring (5 kg / m2) Ceramoplast (5.5 kg / m2) Folding roof (6 kg / m2) Polymer-sand tile (25 kg / m2) Ondulin (erector) (4 kg / m2) Composite tile (7 kg / m2 ) Natural slate (40 kg / m2) Specify the weight of 1 sq. Cover meter (? Kg / m2)

kg / m 2

Enter the roof parameters:

Base width A (cm)

Foundation length D (cm)

Lifting height B (cm)

Length Side Swees E (cm)

The length of the front and rear sv (cm)

Rafters:

Step rafal (cm)

Wood grade for rafters (cm)

Working section of lateral rafters (not necessarily) (cm)

Calculation of doom:

Width of the Grubel Board (cm)

Baseline thickness (cm)

Distance between boards dolets
(cm)

Snow load calculation:

Choose 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)

Calculation of wind load:

Ia II III IV V VI VII

Building height

5 m from 5 m to 10 m from 10 m

Type of terrain

Open area Closed terrain city districts

Results of calculations

Roof inclination angle: 0 degrees.

The angle of inclination is suitable for this material.

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

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

Roof surface area: 0 m 2.

Approximate weight of roofing material: 0 kg.

The number of rolls of insulating material with the adoption of 10% (1x15 m): 0 rolls.

Rafters:

Load on the truss system: 0 kg / m 2.

Length rafted: 0 cm.

Number of rafters: 0 pcs.

Obsek:

The number of rows of crates: 0 rows.

Uniform distance between the shell boards: 0 cm.

Number of shell boards standard length 6 meters: 0 pcs.

Scope Board Volume: 0 m 3.

Approximate weight of the shell boards: 0 kg.

General information about a single-sided roof

Single-side - the simplest roof design. Since it has only one slut, it is quite simple, and the consumption of materials is minimal. This kind of roof is often used in the construction of garages, sheds, various non-residential auxiliary buildings, both with a attic, and without it.

When building a single-table roof, you can use any kind of roofing materials, insulation materials and insulation. You can install such a roof at different angles, but more often its angle is made small, up to 0º (flat roof). But it is important to remember than less cornerThe stronger it affects snow loads, which means such a roof you need to brush from snow in a timely manner.

Additional information on the results of calculations

The angle of inclination of the roof - The angle under which is tilted by the skate and rafters to the ceiling plane. Various roofing materials have individual limit angles. The calculator informs whether it is possible to build a roof under this angle from the selected material. If you need to change the angle, it is enough to correct the height of the roof lift (B) or the width of the base (A).

Roof surface area - the area of \u200b\u200bthe entire surface of the roof, including side and end skes. This value will help you calculate the required amount of roofing, insulating and other materials.

Approximate weight of roofing material - the total approximate weight of the roofing material. It is calculated on the basis of the specified roof area, taking into account the soles.

The number of rolls of insulating material - The amount of insulating material specified in the rolls is required for the roof construction. The standard of the roll is taken as the basis - 15 meters long, 1 meter wide. When calculating, it is also taken into account 10% in the joints of the joints.

- Maximum weight coming on the rafter system. The wind and snow loads are taken into account, the angle of inclination of the roof, as well as the weight of the whole design.

Length of Stropil- Full length raftered from the ridge of the roof to the edge of the skate.

Number of timelines- To erect the roof you will need a given number of rafters if you have them with the step you specified.

Minimum Scroll Scroll / Weight Slinge / Brous Volume

1. To ensure the roof of the mechanical strength, the rafters specified in the first column should be followed. The calculator comes from the total loads that can affect the design of this roof.
2. In the second column, the total weight of all rafters for the roof of this design is indicated.
3. For the convenience of further calculations, the total volume of timber rafters in cubic meters is indicated.

Number of rows of clamps- The number of rows of the root, which will be needed for the entire roof with the specified parameters.

Uniform distance between the shell boards- Distance that is recommended to withstand between the bug boards to optimize the consumption of the material and do without its trimming.

Volume of the shell boards- Total volume of boards on the crate (for the whole roof). For the convenience of calculating the cost of lumber, use this value indicated in cubic meters.

Approximate weight of the shell boards - The total weight of the shell boards.

We offer professional free calculation rafter system double roof With the help of an online Calculator site, 3D visualization and detailed drawings. Detailed calculations of the roof and roof, all materials, crates, rafters, Maurolat. Try the calculation duscal roof right now!

Our online calculator The rafter system will make a calculation of a double roof:

• calculation of the length of the rafted double roof
• quantities of rafters and steps
• calculation of the area of \u200b\u200bthe two-tie roof and angle of inclination
• calculation of the roof crate
• the number of sheet roofing materials (for example, professional flooring, metal tile, slate)
• parameters of vapor insulation and insulation

To form the calculation of the calculator of the duplex roof, you need to measure and enter the following dimensions into the corresponding windows:

The cross section (x width thickness) and the step of the rafter depend on the angle of inclination of the roof, its type, the length of the rafter foot, the maximum of the main loads, as well as on the type and weight of the roofing coating, and even to some extent from the width of the insulation. If you do not know where to take the standard parameters of rafters and crates, our article will help you. Optimal cross section, shade and rafter step depending on the type of roof ».

The calculator performs calculating materials on the roof, repulscing from the size of the roofing sheet and from the calculated value of the roof area. The number of roofing materials for the roof, boards and timber for the rafter system we advise you to buy nevertheless with a small margin, it is always better to pass the remnants of the construction store than paying a bunch of money for the delivery of a lacking pair of boards.

Be careful! From how much accurate values \u200b\u200byou will make, such a reliably online calculator will be able to calculate a batch roof.

Simplify your counts and save time, the program itself will draw plan of Solfilduscal roof And the results of the calculation of the bartal roof in the data introduced by you in the form of a duplex drawing in different angles of the review, and its interactive 3D model.

On the bookmark " 3 D. - View»You can better see your future duplex roof in a volume view. In our opinion, visualization in construction is a very necessary opportunity.

If you have a double roof with different rods in the project, you should make a calculator using a calculator twice for each slide separately.