The angle of the roof can save the building from the weather or ruin it

Any building needs reliable protection fromadverse effects of the environment. These are the climatic changes, expressed in the change in wind strength and precipitation (snow, rain, hail). This protection is provided by the roof of the building, above all, the roof of the pitched structure as the most effective. The reason is that the angle of the roof, using the gravity of the Earth, allows you to quickly remove the sediments from the roof, without overloading its elements.

It is reasonable to assume that it is idealself-cleaning will be the roof with the greatest possible angle of inclination. But it is worth making a simple drawing on paper to see what insurmountable problems appear in this case.

The increase in the angle of inclination of the roof takes everything higher andabove its hobby, and with it the geometric progression of its construction and arrangement. The larger the roof area, the greater its sail, that is, the surface that is exposed to wind. For example, if you increase the angle of the roof by 34 degrees, from 11 to 45, the wind load on the roof increases fivefold. This automatically entails a reinforcement of the roofing structure. Finally, a large roof area implies a higher consumption of materials. In sum, all this increases the cost of work at times.

The above numbers are 11 and 45 degrees - notare random. It is in this range that a compromise is sought between the need to protect the building from precipitation and winds, on the one hand, and the structural features of the house, on the other. There are no universal recipes here, calculation of the optimal angle at the design stage in each case must be carried out separately.

Before calculating the angle of the roof, you need to know the value of the full load on the roof. It is composed of the mass of the roof per square meter and the maximum snow load in the region.

The mass of the roof is defined as the sum of the masses of all itscomponents. As you know, a roofing "pie" is a covering, a crate and a heater. But it is necessary to take into account also some stock of mass, for which purpose it is necessary to multiply the received sum by a factor of 1.1.

The regulatory documentation for construction contains information on the regional maximum snow load index and its reduction factors that take into account the roof incline angle.

It will need to be changed if, as a resultThe calculations will reveal the excess of the maximum permissible load on the roof. This change will result in a decrease in the snow load. If such a measure does not lead to an acceptable result, the root of the problem should be sought in an imperfect roof design.

For each type of roofing material, there isits minimum angle of slope of the roof. For example, tiles, slate and other materials from the set elements allow you to make a ramp of 22 degrees. Such an angle of inclination of the roof does not allow the accumulation of moisture in the joints. Three-layer roofing from roll materials - 2-5 degrees, two-layer roof - 15 degrees. Profiled sheeting - 12 degrees (at lower angles joints must be treated with sealant). Metal tile - not less than 14, soft tile - 11 degrees.

When choosing the angle of inclination of the roof, one must always remember the bearing capacity of its structure, which allows resisting any stresses and external influences.

Thus, determining the angle of the roof slope is a crucial step. The mistake can not only cost material costs for emergency repairs, but also become a threat to the health and lives of people living in the building.