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,

2007 Kentucky Residential Residential Code Second Edition Revised January 6,As Adopted by KENTUCKY BOARD OF HOUSING, BUILDINGS AND CONSTRUCTION Department of Housing. The Kentucky Building Code iKentucky Building Code Kentucky Information on Code Enforcement The Kentucky Building Code, now in itsth year, is essentially theInternational. Freepages

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