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,

Roof collapses on OrlandBucksport branch of EBS The. A section of roof at EBS Building Supplies in Orland, just across the Bucksport town line, collapsed on Friday evening. PHOTO BY CHARLES EICHACKER Roofing Contractors Maine Contractor Directory Listings for Roofing Contractors in Maine ME Customer 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.