It should be resistant to temporary wear, fires and mechanical damage. That is, the roof should provide for the most long time for the inhabitants of the house with calm and life and comfort. Roofs with different forms are suitable for certain climatic conditions. Where the roof snow rarely falls out can be done with a very small slope or almost flat. Now the Geberit installation service is very popular, more details will not be superfluous to find out about it.
In places with heavy snowfalls, the arrangement of the pitched roof with a large angle of inclination is more reasonable, otherwise the snow will not slide, which can lead to collapse and appearance of rust.
An important role is played by the location of the house. So if the building is located in the field or on the hill, that is, in a place that openly all winds should not be erected a sharp roof. If the house is built in the lowland, then the pitched roof will be more appropriate.
The cost of the material depends on the angle of the roof. With a high roof, more material is needed. And if there are some restrictions in the means, then you can make a flatter roof.
In each individual case, it is worth choosing an angle of inclination, starting not only from financial capabilities, but also from the nature of the terrain and climatic conditions.