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,

Painting or sealing asphalt shingles Ongoing discussion on The Home Page of the Finishing Industry® Painting or sealing asphalt shingles Bids Options Bid Date Bid Time Date Recieved Project Location Project Title Details 7/7/2015 20000 PM 5/22/2015 Batesville, MS/Panola City of Batesville Water Well #7

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