Installation of the DUROVENT BAFFLE eliminates the need for using a blocking material such as batt insulation between the vent and the wall top plate, as is commonly the practice for installation of rafter vents without an integral baffle. The DUROVENT BAFFLE is both water resistant and durable, blocking out moisture and wind from penetrating the attic, satisfying even the most demanding building code requirements. The DUROVENT BAFFLE is designed to friction fit between the rafters or trusses with the vent's cones pushed up against the roof deck.  Secure the vent in place stapling the wide nailing flanges to the truss and top plate by using a horizontal stroke with your hammer tacker.