Corodrain valley troughs and gutters can be used with almost any form of slate, clay or concrete tiles.They provide an economic and durable alternative to lead, and join any combination of roof tiles or slates.Designed to provide a weather proof seal between adjacent roofs.Will give only minimal disturbance to the adjacent roof.Design ensures slates don't 'kick-up'.50mm wide sanded strip for mortar retention.PropertiesWidth: 260mm.