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,

Sheet Lead for Roofing & Flashing Mars Metal Mars Metal provides sheet lead conforming to Federal QQL2 and QQL1 and ASTM B29 and B749. Made from 98% recyclable material, sheet lead is Types of Metal Roofing Materials Metal roofing materials include steel, aluminum, copper, and

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