Building panels, not of metal; composite panels of non-metallic materials for use in building; decorative ceiling panels made with synthetic resins; door panels, not of metal; floor panels not of metal; construction elements not of metal; bearers, beams and elongate building members not of metal, fence panels of non-metallic materials; modular wall panelling of non-metallic materials; multilayer panels of plastic for use in building; non-metallic building materials in the form of panels; non-metallic shaped panels for use in the construction of doors; planar panels made of fibre-reinforced plastic; polymeric building panels: solid polymer and mineral combination building panels