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,

GM Moves IT InHouse As Offshoring of IT Slows The CIO. Job Losses Attributable to Offshoring, Productivity YEAR JOB LOSSES; 2002 152,000 2003 127,000 2004 87,000 2005 105,000 2006 91,000... Lexington HVAC Contractors Recommendations Lexington, KY. Find HVAC Contractors in Lexington, KY. Read Ratings and Reviews

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