At left-hand verges and left-hand side abutments, left hand verge tiles must be used in alternate courses. Old Hollow Clay Pantiles are traditional overlapping single pantiles produced with a weathered, rustic finish to create an aged appearance from day one. The unique and random pattern and texturing applied to the product provides the visual appearance of reclaimed pantiles whilst modern production overcomes the integrity risks associated with them. With their distinctive pattern of rolls and troughs, Old Hollow perfectly replicates the traditional old English pantile shape, producing roofscapes of outstanding charm and character. Properties Nail size: 55mm x 2.65mm ring-shanked. Tile finish: weathered finish. Tile profile: clay pantile. Certification BBA certified. Old Hollow Clay Pantiles conform to BS EN 1304:2013 Clay roofing tiles and fittings - Product definitions and specifications.