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,

The National Refinery at Coffeyville, Kansas BIG OIL REFINERY FOR COFFEYVILLE. The National Refining Company of Cleveland, Ohio with capital stock of $5,000,000 have completed arrangements for a refinery to. Huck Boyd National Institute for Rural Development. Kansas State University Huck Boyd National Institute for Rural

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