Fibre Cement Close Fitting Ventilated Ridge (Green) - Two Piece For application with roof pitches from 5° to 45°, both for classical and for round lay. Two-piece close fitting ventilating covers are always installed round, independent of the sheeting method. As a consequence, both top and bottom are installed from R to L. The bottom part is placed on the roof surface where the corrugated sheets are placed from R to L. Both top and bottom part are delivered with a pre-mitred corner for a lap of 200 mm. The hood is provided with a rectangular opening of 200mm x 60 mm. Cover Length - 1048mm