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,

Graham Roof & Repair Inc. sonville Roofing Company The sonville roofing company of Graham Roof & Repair Inc. is the leading residential roofing contractor, specializing in new roof installation, roof repairs. NRCA Polyiso Rvalue recommendation Tech 2010 SiNCe 1987, NRCA has recommended designers use an inservice

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