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,

Michigan General Construction Contractor Michigan. Michigan General Construction Contractor Michigan Business Listings, Business Listings in Michigan for General Construction Contractor. Categorized in Construction. Drummond BMR Building Supplies Marmora, Ontario. Ontario Rural Routes Your resource for the wealth of products, services and activities found in Rural Ontario

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