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,

CONSTRUCTION BIDS AND RFPS County of Milwaukee CONTRACTOR QUALIFICATION STATEMENT The completed qualification statement shall be received by the County Clerk no less than fivecalendar days prior to the bid. Milwaukee County Research Park Land is available for acquisition in the Milwaukee County Research Park MCRP

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