This European Standard defines clay roofing tiles and determines the general specifications to which they are bound as well as the rules for classification, marking and quality control of products. It applies to all tiles and fittings as defined in 4.1. Clay roofing tiles and clay fittings which conform to this standard are suitable for use as vertical cladding. The geometric and flexural strength criteria are not applicable to clay fittings or special tiles. This standard defines the specifications which, if satisfactory at the time of delivery, ensure that the product is able to withstand the modifications that occur at materials in normal conditions of use whilst continuing to fulfil its proper functions. NOTE: When tiles are used as vertical cladding, it is recommended that a suitable method of fixing be provided.