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,

Evergreen Lumber Inventory optimized for new. 11. 1. Evergreen Lumber, d Parkway Port Orchard, Port Orchard city from the US Census Bureau Business Port Orchard Washington; Total number of firms, 933 551,340 Blackowned firms, percent, F S American Indian and Alaska Native. Hellas Construction Organic Infill

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