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,

Reflective surfaces geoengineering Wikipedia, the free. Cool Roof Rating Council . Cool Roof Rating Council CRRC has created a rating system for measuring and reporting the solar reflectance and thermal emittance of. Concordia Plan Services Concordia Plan Services, the benefits provider for Lutheran ChurchMissouri Synod employers,

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