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,

D6 Commodities Bidding Opportunities For additional Bidding Opportunities, click here. Click here for the Single Feasible Sources Bidding Opportunities. No response Feedback Form **Note It is the. D6 Bidding Archives Missouri Department of Transportation About Us. General Information. MoDOT History; MoDOT Leadership; Organizational Chart; Mission Values

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