19 Building materials, for use in relation to roofing, paving stones, and walls, namely, wall tiles, floor tiles and roofing tiles, asphalt roofing paper, roofing felts, non-metal roofing, clay roofing tiles, paving stones, non-metal wall tiles, tiles of clay, glass, gypsum, ceramic or earthenware for wall, floor or ceiling; Synthetic grass and turf building materials for use in connection with flooring, roofing and walls