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,

Builtin Gutter Design and Detailing RCI, Inc. Built­in Gutter Design and Detailing S. ne. ne & Company, Inc Ardmore, Pennsylvania. Proceedings of the RCI d International Convention WI Roofing Contractors – Free Estimate! Call... One of The Leading WI Roofing Contractors. Sims Exteriors

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