| 摘要 |
A roof ventilation system for asphalt shingle or composition roofs which include a vent slot located through the roof structure along a roof ridge is provided. An unrollable vent assembly that is installable in one piece is formed from an upper water barrier having first and second vent arrangements connected thereto, and each of the first and second vent arrangements include at least two continuous longitudinal strips of a vent material with a continuous longitudinally extending space therebetween separating the strips. The strips and the longitudinally extending space are positionable on the roof parallel to the ridge so that the first and second vent arrangements are located on each side of the ridge vent slot, respectively. The vent system prevent ingress of moisture and debris, and the upper water barrier extends between the first and second vent arrangements and over the vent slot in the installed position.
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