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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,
Roof vents, ICBO approved plastic roof vent, RCV Stem Vent. The stem vents eliminated the need for metal adapters by integrating the stem into the roof cap; Dampered vent features oneway vent system; ilable in 4" and... Sheet Metal Roofing Free architectural library for sheet
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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