Building materials of concrete reinforced with plastics and glass fibres; Non-metallic building materials for the covering of walls; Non-metallic building materials for use in cavity walls; Non-metallic building materials for use in cladding; Non-metallic building materials having acoustic properties; Non-metallic building materials having insulating properties; Non-metallic building materials having sound deadening properties; Non-metallic building materials having thermal insulation properties; Non-metallic building materials in the form of panels; Partitions being non-metallic building materials