Benjamin Obdyke Shark Vent Xtra Ridge Vent 14.75"x25'

Shark Vent combines the rigidity of a sectional vent, with the fast installation of a roll. Shark Vent Xtra also includes an additional filter for added peace of mind in extreme weather areas. 1 3/4 inch Hot Dipped Galvanized nails included. Ridge Vent works on the basis of several principles. Adequate soffit ventilation coupled with ridge ventilation produces a pathway for continuous airflow along the entire underside of the roof deck. Airflow is maintained two ways. First, hot air naturally rises and exits out the ridge vent, pulling in cool air from below. Second, positive airflow across the ridge of the house creates a "venturi effect", or a negative pressure, which pulls air out of the ridge vent and brings in cool air from the soffits below. In calm or windy weather, the entire attic is vented by a constant flow of cooler, dryer outside air.

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