Roofing Supplies Chimney Pots, Flue Liners & CowlsWe stock a variety of Flue Liners, Cowls and new or reclaimed Chimney Pots for your chimneys. Concrete & Clay TilesD.L.Williams supply a range of concrete and clay roofing tiles from popular brands such as Marley and Redland. We also stock various reclaimed Marley and Redland roofing tiles. LeadWe stock a range of Lead products suitable for all roofing closures and weatherproofing details. Ridge TilesD.L.Williams carries a large stock and ranges of new and reclaimed ridge tiles. SlatesWe stock a range of natural slates from Wales, Spain, China and other various places around the world as well as composite Slates.