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,

Basalt Crossville Inc Tile Distinctly American. For strength that rocks, simplicity that shines and style that ignites, choose volcanically inspired Basalt Porcelain Stone®. Basalt Blue Slate Tile & Slabs Basalt Blue Slate Tiles are a deep blue with undertones of gray. These Basalt mosaic tiles are

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