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,

Seattle Roofing Guardian Roofing Seattle Roof Contractor. Seattle roofing professionals at Guardian Roofing are factory trained for all roofing products we install. Call81 for a free evaluation. Old House Journal Online Traditional Products By the 19, color was as important as shape in marketing asphalt shingles.

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