The roof is part of any house. It is very important for it to pick up high-quality roofing material. Experts adhere to the opinions that when his choice should take into account the angle of inclination of the roof, which serves in order for water to be delayed. The bias of the roof is made to call the angle of its tilt to the horizon. It is usually expressed in percent or in degrees. Therefore, the more its value, the roof will be cooler. We will talk about the methods of calculating this indicator further.
Types of roofs
Depending on the angle of inclination, the following roof designs are distinguished:
- Flat.
- Scope.
- High.
- Spray.
It is worth saying that the flat roof is not completely horizontal. Otherwise, the water from it did not flow. Such a roof the angle of inclination should be at least 30 degrees.
Depending on the design features, three main types of roof are distinguished:
- Arbitrary.
- Middle.
- Axual.
Arbitrary is called structures for which the load is not calculated due to the effects of wind and atmospheric precipitation. Such roofs usually erected only according to the wishes of the owner. They are often equipped with storage rooms or even residential premises.
The average is the best ratio of the corner of the roof of the roof, taking into account the influence of atmospheric precipitation and wind. Such a roof is best to build in regions with high humidity.
As for a little roof, its design is designed in such a way as to reduce the effect on her strength. In addition, this coverage copes well with precipitation. Such roofs are installed in almost any region. After all, they have a minimum bias and fit almost for each design of the house.
The roof with a small bias has several serious advantages, namely:
- Efficiency.
- The greatest resistance to the wind.
- Aesthetics.
Despite the fact that may have to spend money on the purchase and installation of additional means of protection against water, indisputable advantages will pay off these costs.
What does the bias of the roof depends
The angle of inclination is usually determined depending on the design of the roof, the roofing material used, as well as from the climate of the region where the house will be built.
In order to know how the roofing material is selected depending on the inclination of the roof angle, it is necessary to know what affects this indicator. Related to such factors:
- wind,
- precipitation.
Recommendations:
- The greater the roof slope relative to the horizon, the wind resistance is higher. If this indicator is small, that is, the likelihood that a strong impulse of the wind at some point will sill on the surface of the roofing material.
- It is impossible to fall in extremes and build very steep designs or with too small inclination. Thus, the minimum bias of the roof should be 30 degrees, but according to the recommendations of specialists, for regions with the unstarted wind, it can reach 35-40 degrees.
- If the house is erected on the ground, where strong wind gusts are possible, then the recommended inclination value corresponds to 15-25 degrees.
- As for precipitation, it is considered the more bias, the roof will be more sealed. With a coolest roof faster flows water and snow. When choosing an inclination, it is necessary to take into account these both factors.
- When the angle is selected, it is necessary to choose a coating for the surface in accordance with it. Not only the type of material, but also the number of layers that need to be laid on the size of the roof to the horizon.
Units
Today, the inclination of the roof is mainly measured in degrees or percentages. The correct angle can be selected by both systems. To find out the desired value, you can take the results of measuring the roof itself, as well as the reduced model shown on paper. The desired degree must be laid during the installation of the structure.
Consider how to calculate the bias of the roof in percent. It is necessary to take the height of the skate, divide the resulting value to half the width of the house, then everything should be multiplied by 100%. In percentage ratio, 100% corresponds to 45 degrees, and 1 degree is 1.7%. If in the region where the house is erected is a strong wind, then when calculating the angle of inclination of the roof is recommended to do the minimum. To measure and designify the roofing of the roof there is a special tool called a slope.
How to calculate the bias of the roof
Usage Scheme
To make it easier, you can use a special scheme that allows you to choose the roof material depending on the level of its inclination. Here is the minimum angle corresponding to 0% and the maximum - 100%. Percentage values \u200b\u200bare applied to the vertical scale. In the center of the scheme there is a semicircular scale in which there are calculations in degrees. In general, the higher the value of the tilt, the you will need more layers of material on it to lay. By the way, the amount of the desired material can be just determined by the magnitude of the liplon.
Consider how the calculation of the edge of the roof affects the choice of material. According to the diagram, if the slope is from 0 to 25%, then can be used to cover the roof of rolled materials. With a bias of 0-10%, the flooring is recommended to lay in three layers. If this value is 10-25%, then one layer can be put, for example, a substitution material.
On the roofs whose slope is not more than 28%, asbestos-cement wavy sheets can be laid, for example, slate. If this indicator is up to 29%, it is recommended to use steel coating. With a slope of 33% and higher, it is often used as the roof material.
Calculation by formula
When the bias of the roof and the desired coating material is determined, it is necessary to calculate the height of the skate. To do this, you can use a simple mathematical method: you need to take the width of the span at home and divide it into two. The result of the private must be multiplied by a relative value that is calculated using a special brady's table. It contains values \u200b\u200bfor each angle.
Now we give an example of calculating the liner of the roof. If the width of the span is 8 meters and the angle of inclination of the roof is 25 degrees, then the height of the skate is obtained by the following: 8: 2 \u003d 4 4 * 0.47 \u003d 1.88 meters.
Considering in the opposite direction along the same formula, you can determine the angle of inclination of the roof. During construction, it is hardly necessary, but can be useful during repairs.
Using a sucker
The magnitude of the slope can still be calculated using a special tool called a slope. It is a rack with a frame attached to it. There is an axis between the straps to which the pendulum is fixed. Inside the cutout there is a scale with divisions. When the rake lies horizontally, it corresponds to zero on the scale.
Now we learn how to count the bias of the roof with the help of this tool:
- So, you need to keep the rail at right angles to the skate. In this position, the sludiner of the sucker will show the desired magnitude of the slope.
- The tool issues values \u200b\u200bin degrees. If you need to translate into interest, you can use the Special Table below.
Optimal bias roof for different materials
- To cover houses, tile or slate is often used. The roof made of such a material has the highest angle of inclination, namely 22 degrees. If this indicator is smaller, then there will be moisture, water through the place of the joints due to the wind under the roof.
- If the roof is planned to use metal tile, the slope should be less than in the previous version. The minimum permissible bias of the roof is 14 degrees. If it is less, the roof flooring can disrupt. This is due to the fact that in proportion to the decrease in this indicator, the magnitude of the ventilation gap increases.
- When erecting the roof from the professional flooring, the minimum angle of its inclination will be 12 degrees. In this case, all existing joints are processed by sealant.
- Another popular roofing material, distinguished by high reliability, is Ondulin. The minimum inclination angle of the roof when it is used is 6 degrees.
- As for rolled coatings, this material has different values \u200b\u200bof the minimum angle of inclination. It can range from 5 to 25 degrees. To select an inclination angle in this case, the number of roof layers should be considered. For example, when using 3-4 layers, there is enough angle of 5 degrees, and at 1-2 layers it should be from 10 to 25 degrees.
Important! It is worth understanding that all the meanings that are indicated here are just recommendations. Therefore, everyone has the right to choose an angle of inclination of the roof to the horizon at its discretion. Some builders forget about such a very important detail as the planning of the drain, and after all, it is through it water flows from the roof. If you do not care about it in advance, then after the construction of the roofing may have difficulty with water assignment.
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