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,

Curtis Cook Designs Salado, TX, Houzzreviews of Curtis Cook Designs. "Curtis Cook Residential Designs has been designing award winning custom homes in the Central Texas area for over years. All Around Maintenance & Repair Florence, . All Around Maintenance & Repair is a locally/owner run

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