At verges and side abutments, half tiles must be used in alternate courses. A double pantile shape is quicker and easier to lay than a single pantile design. However, Grovebury concrete interlocking tiles still retains the traditional, gentle flowing lines of a classic pantile to blend easily and harmoniously into any environment. A low pitch, wide variety of colours, and two different surface textures makes Grovebury a popular choice for both new build and renovation. Now also available in Charcoal Grey and Rustic Red. Properties Nail size: 70mm x 3.75mm. Tile finish: smooth - through coloured. Tile profile: profiled. Certification BBA certified. Grovebury Tiles conform to BS EN 490: 2011 Concrete roofing tiles and fittings for roof covering and wall cladding - Product Specifications.