At verges and side abutments, half tiles must be used in alternate courses. A neat, low profile tile designed to blend unobtrusively into its surroundings and givin a more contemporary feel to a roof with a square edged profile. As with all interlocking concrete tiles, Renown is quick and easy to lay but also provides exceptional wind and driving rain performance. Properties Nail size: 50mm x 3mm. Tile finish: smooth - through coloured. Tile profile: profiled. Certification BBA certified. Renown Tiles conform to BS EN 490: 2011 Concrete roofing tiles and fittings for roof covering and wall cladding - Product Specifications.