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,

Town of Grafton, MA Town Departments The Grafton Conservation Commission is the official agency charged with the protection of Grafton’s natural resources. The Commission has seven full members and. Grafton County from the US Census Bureau Business Grafton County New Hampshire; Private nonfarm establishments, 2,867 37,185

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