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 Size: 343mm x 242mm. Minimum pitch: 30 at 48mm headlap. 35 at 38mm headlap. Maximum pitch: 90 - subject to fixing specification.. Minimum gauge: 295mm. Maximum gauge: 295mm below 35. 305mm at 35 and over. Tile thickness: 13mm. Hanging length: 310mm approximately. Coverage: 16.4 tiles/m2 below 35. 16.2 tiles/m2 at 35 and over. Weight: 2 tonnes/1000 tiles approx. Batten size: 38mm x 25mm - rafter centres up to 450mm. 50mm x 25mm - rafter centres up to 600mm. Battens required: 3.39m/m2 below 35. 3.28m/m2 at 35 and over. 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.