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,

Lennox Dealer Locations Lennox Residential We have dealers in nearly all major cities across North America! Choose directly from our list of Lennox Dealers by state/province spray foam insulation Springfield Illinois Iowa Indiana. Contact Envirofoam for your Free Bid Free spray foam insulation bid. Residential, Commercial

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