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,

Bad Kreuznach Wikipedia, the free encyclopedia Bad Kreuznach is a town in the Bad Kreuznach district in RhinelandPalatinate, Germany. It does not lie within any Verbandsgemeinde, even though it is the seat of the h Lane, Bedford, PA For Sale Photos, maps, description forBirch Lane,

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