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,

LEED CS2009 WEp1 Water Use Reduction LEEDuser — LEED. You will not earn this prerequisite using standard fixtures that only comply with the federal EPAct 1992. This prerequisite, first introduced in LEED 2009, raises 20141009 Moneysaver LewisClark Edition Moneysaver Moneysaver is a free community want ad

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