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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,
NRCA Store NRCA, National Roofing Contractors Association Roofing Safety OSHA 10hour Program This is the only OSHA 10hour construction program specifically designed to help you identify and avoid hazards you are likely to. Authorized fabricators for NRCA s UL certification for. Authorized fabricators for NRCA s
A very important element that must be considered when the roof is projected, is ventilation, allowing drainage of excess dampness from under the roofing.
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