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,

truss PPT Presentations What is a truss a truss is an assembly of linear members connected together to form a triangle or triangles that convert all external forces into. Penzel Construction Co., Inc. Penzel is a major contractor for the new federal courthouse in

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