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,

Callahan Steel Buildings Oklahoma s Welcome to Callahan Steel s Website. Callahan Steel Buildings is Oklahoma s premiere steel building company located in Mustang Oklahoma. Callahan Steel Buildings has. Building Packages Callahan Steel Buildings Callahan Steel offers many building packages and options to choose from Oklahoma

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