Type of construction;

Type of construction;

The strength of the rafter system;

climate of the area;

Possible fire hazard.

So, for example, if you are not very sure of the reliability of the rafters, you should choose as lighter material, for example, ondulin or rubber. The roof covered with corrugated board or corrugated man will require thorough insulation and sound insulation. It is worth noting that galvanized roofing iron quickly loses its attractive appearance, fades or even covers with a whitish raid.