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,

2011/2012 UNION CONTRACTORS DIRECTORY DuPAGE COUNTY BUILDING TRADES COUNCIL 2011/2012 UNION CONTRACTORS DIRECTO Bella Vista Parkway , Phone34 Infignos Directory Speed Submit Speed Submit All fields except the City/State for UNITED STATES OR INTERNATIONAL are required fields. Please do not use special characters >,[],... Listings with.

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