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,

Yorkshire Roofing Bay Area Roofing Contractor of Northern. Roofing and gutter repair and installation, wood siding and roof tiles. Located in Livermore. Serving the bay area. World Exteriors Livermore Roofing Contractor, General. World Exteriors is a locally owned and operated roofing contractor, general contractor and building

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