The Redland Clay Universal Angle Ridge is ideally suited for use with all types of natural of fibre cement slates but can also be used with Cambrian Slate, Rosemary Red Clay Plain Tiles or Westminster Slate. Technical Maximum Pitch: 45 Length: 450 mm (2.2 ridge tiles per linear metre) Clay Universal Angle Ridge Tiles can be used with any of these dry fix ridge systems: DryVent Ridge Rapid Vented Ridge Uni-Vent Rapid Ridge/Hip The ridge tiles can also be used if mortar bedding and mechanically fixing the ridge line. In these cases, our new Mortar Bedded Fixing Kit can be purchased to secure the ridge tiles.