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,

Guardrail Systems for Residential Roofs Roofing Contractor Guardian Fall Protection makes a variety of Guardrail systems for residential and commercial roofs. The company’s Residential Roofers Guardrail System includes. OSHA Changes the Rules 20110304 Roofing Contractor National commentators who opposed the cancellation of the current instruction included

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