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,

Baker Roofing Company Commercial and Residential Roofing. Baker Roofing Company is the Third Largest Roofing Contractor in the Nation That Installs Roofing Systems for Businesses and Homes North Carolina, South Carolina. HighWind Asphalt Roofing JLC Online From Coastal Contractor Fall 2004; Posted on September 1, 2004;

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