The main factor that may weaken the stability of the roof structure is dampness. On its negative impact it is particularly exposed rafter framing, which deform under impact of water. Therefore is important roof protection against getting in  water into its internal structure.

Typically, investors during the construction of the roof attach great importance both for building materials, as well as careful execution. Unfortunately, later very often they forget about the survey, and any minor defects  commission outsource cheaper and often non-professional roofing companies. This is a big mistake,

Extended Roof Design Ideas, Pictures, Remodel and Decor A "fact" that has been carried along with modern architecture is that all buildings in the idiom have flat roofs. Of course many do for a number of reasons, from. Classic Metal Roofs, LLC About Us About Classic

A very important element that must be considered when the roof is projected, is ventilation, allowing drainage of excess dampness from under the roofing.