Barriers of plastic materials for construction purposes; Expanded plastics for use in construction; Non-metallic composite materials for use in construction; Non-metallic impact resistant construction materials; Non-metallic materials for construction purposes; Non-metallic materials for use in building construction; Non-metallic materials for use in construction; Planks of non-metallic materials for use in construction; Plastic articles for use in building (construction); Plastic articles for use in construction; Plastic materials for constructional purposes