E04F 13/185

Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements, of organic plastics with or without reinforcements or filling materials {or with an outer layer of organic plastics with or without reinforcements or filling materials; plastic tiles with an outer layer imitating natural stone, brick work, tiled surface or the like}