The angle of the roof can save the building from the weather or destroy him

Any building in need of reliable protection against adverse environmental effects.It refers to the climatic changes lead to a change in wind speed and precipitation (snow, rain, hail).This protection is provided by the roof of a building, especially a sloped roof design as the most effective.The reason is that the slope of the roof, using Earth's gravity, allows you to quickly remove from the roof of precipitation, without overloading its elements.

It is reasonable to assume that perfect self-cleaning a roof with a greater angle.But it is necessary to make a simple drawing on paper to see what insurmountable problems while there.

Increasing the angle of the roof takes up and up her horse, and with it grows exponentially its construction and development.The larger the area of ​​the roof, the greater its sail area, i.e., a surface that is exposed to the wind.For example, if you increase the angle of the roof is 34 degrees, from 11 to 45, the wind load on the roof increases fivefold.This automaticall

y entails strengthening of the roof structure.Finally, a large area of ​​the roof, and assumes a larger material consumption.In sum, all this increases the cost of work at times.

The above figures - 11 and 45 degrees - are not accidental.It is in this range is searched, and a compromise between the need to protect the building from rain and winds, on the one hand, and the structural features of the house - on the other.Universal recipes here, calculate the optimum angle at the design stage, in each case to be performed separately.

Before you calculate the angle of the roof, you need to learn the value of the total load on the roof.It is composed of the weight of the roof on the square meter and the maximum snow load in the region.

Weight roof is defined as the sum of the masses of all its components.As you know, roofing "pie" - the coating, sheathing and insulation.But it is necessary to take into consideration the weight of some stock, which multiply the total by factor 1.1.

Regulatory documentation on construction includes information on indicators of regional maximum snow load and its coefficients of reduction, taking into account the angle of the roof.

His need to be changed if the result of the calculations will emerge excess of the maximum allowable load on the roof.This change will entail a reduction in the snow load.If such a measure did not lead to an acceptable result, the root of the problem must be sought in the imperfect design of the roof.

For each type of roofing material has its minimum angle of inclination of the roof.For example, tile, slate and other materials from the composing elements allow you to make a ramp to 22 degrees.Such roof angle prevents accumulation of moisture in joints.Three-layer roof of rolled materials - 2-5 degrees, two-layer - 15 degrees.Decking - 12 degrees (at the lower corners of the joints must be treated with a sealant).Metal - at least 14, soft tile - 11 degrees.

When selecting the angle of the roof all the time you need to keep in mind the carrying capacity of its design, which allows you to resist any stresses and external influences.

Thus, the determination of the angle of the roof - crucial stage.The error may not only cost material costs for emergency repairs, but also become a threat to the health and lives of people living in the building.