This Marley Segmental Mono-Ridge Union in Brown is for use when fixing a Marley Ventilated Dry Ridge System. The Marley Ventilated Dry Ridge System boasts fast, simple installation and is suitable for all Marley tiles and slates. It provides a weathertight and ventilated mechanical fix for ridge tiles, eliminating the need for mortar completely. The Marley Ventilated Dry Ridge System is compatible with the Marley Ventilated Dry Hip system and meets BS 5534 requirements and NHBC guidelines.