The Ubbink Over Fascia Ventilating System is a one-piece interlocking system fitted to the top of the fascia. It diverts surface water from the underlay into the gutter and prevents large insects and vermin from entering your roof space whilst providing continuous ventilation. This fascia vent system is suitable for use with roof pitches of 15° - 70°. However if the pitch is below The precise positioning on the fixing points has been designed to prevent any leaking between the interlocking strips. Features & Benefits Semi-rigid hinged underlay support flap The OFVS10 has an under-tile bird excluder UV stabilised polypropylene Suitable for use with roof pitches of 15° - 70° Product Specification Colour: Black Material: Polypropylene Length: 900mm Width: 240mm Pack size: 40 units Weight (Single Unit): 0.44kg Weight (Pack): 17.6kg