19 Building materials; building components, buildings, profiles, beadings, mouldings, panels, boards, coverings, all aforesaid goods, not of metal, for buildings; wood for building; prepared wood, wood, structural timber, for building materials; non-metallic building components and building materials having insulating properties; floors, not of metal; floor tiles, floor boards and floor panels, not of metal; floor tiles, floor boards and floor panels of wood, laminate, wood substitute materials, plastic, leather and/or other materials, not of metal; floor tiles, floor boards and floor panels of wood, laminate, wood substitute materials, plastic, leather and/or other materials, not of metal, fitted with integrated locking elements; tiles, boards and panels being wall and ceiling coverings of wood, laminate, wood substitute materials, plastic, leather and/or other materials, not of metal; tiles, boards and panels, being wall and ceiling coverings of wood, laminate, wood substitute materials, plastic, leather and/or other materials, not of metal, fitted with integrated locking elements