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 Size: 418mm x 332mm. Minimum pitch: Through coloured. 15 at 100mm headlap. 17.5 at 75mm headlap. Granular. 22.5 at 100mm headlap. 30 at 75mm headlap. Maximum pitch: 90 - subject to fixing specification. Maximum headlap: 125mm. Minimum gauge: 293mm. Maximum gauge: 318mm below 17.5. 343mm at 17.5 and over. Tile thickness: 29mm. Coverage: 10.5 tiles/m2 at 318mm gauge. 9.7 tiles/m2 at 343mm gauge. Weight: 4.7 tonnes/1000. Batten size: 38mm x 25mm - rafter centres up to 450mm. 50mm x 25mm - rafter centres up to 600mm. Battens required: 3.15m/m2 at 318mm gauge. 2.92m/m2 at 343mm gauge. 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.