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,

Información del juego Estación del Tren Juegos de coches. Arma el rompecabezas de una estación subterránea del tren, diviértete tratando de tener la imagen en el menor tiempo posible y reta a tus amigos a mejorarte. ISSUU Resources Q2by Domtar Resources Q2 2013. Resources, the magazine

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