A perfect match for your Onduline black bitumen roof sheets. Fit this ridge to waterproof the summit of your roof - a robust, reliable and long-lasting solution for garden structures and other non-habitable outbuildings. The matching material and colour provides a seamless aesthetic, enhancing wind resistance as well as preventing water ingress. The use of this roof ridge is also required to activate Onduline's watertight guarantee on its range of roof sheets - sold separately. Bitumen roof ridge - a weatherproof seal for a ridge or verge. 1m length - ridge dimensions of 1000(L) x 420(W)mm. 3mm thickness - for garden or non-habitable buildings. High durability - protects roof from water and snow. Easily cut to size - reduces installation times on site. For use with Onduline black bitumen roof sheets - sold separately. Required to activate Onduline's watertight guarantee - T & Cs apply. Complete your roofing project the right way with the Onduline Ridge piece – the essential finishing element for sealing the apex of your roof. Designed to perfectly match ONDULINE roofing sheets, this durable ridge piece ensures a watertight seal and a clean, professional finish. The ONDULINE® bituminous ridge piece is perfect for ensuring complete water tightness to any timber outbuilding with ONDULINE® roof sheets. The ridge pieces are made from the same bitumen material as Onduline roof sheet, which is reinforced with cellulosic fibres and thermosetting resin. The material is then coloured with inorganic pigments for long-lasting performance and aesthetics.