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,

SF Bay Area Commercial Roofing Oakland Residential Roof. Bens Roofing is an Oakland roofing contractor serving the San , Bay Area. We do roof repairs and skylight installations. Reasonable pricing, great Aussie RoofingMarin County Roof and Gutter Contractor Aussie Roofing is an Authorized installer of GAF

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