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,

Roofing Contractors Chicago And Northern Illinois Roofers Find Better Business Bureau Accredited Roofers in Chicago and Northern Illinois. Your guide to trusted Chicago and Northern Illinois Roofing Contractors, recommended. Chicago And Northern Illinois General Contractors Find. Find BBB Accredited General Contractors in Chicago and Northern Illinois.

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