Decking (non-metallic); plastic articles for use in building (construction); building materials and elements of plastic material; building boards made from wood and waterproof resins; building boards of plastic materials; building components of wood; building components of imitation wood; building materials made from asphalt or bitumen; building materials made of crystallized glass, fibre cement, glass fibres, mineral wool, plaster or rock fibres; fibrous material for building purposes