19 Building materials and elements not of metal for saunas, namely, doors, windows, bench materials being bench boards, wall boards, flooring, and ceiling materials being ceiling boards, all made of wood; building components of wood in the nature of blocks, boards, beams, and floor tiles; planks of wood for building; porches, not of metal, for building; portable and modular non-metallic constructions in the nature of arbors, garden shelters, summer houses, and maisonettes; non-metallic transportable buildings in the nature of garden shelters, summer houses, and maisonettes; prefabricated buildings, not of metal; prefabricated non-metal house kits comprising prefabricated non-metal houses; modular homes, not of metal; modular non-metallic sectional buildings; bicycle sheds of non-metallic materials; non-metallic prefabricated buildings in the nature of kiosks; arbours, not of metal; non-metallic pergolas; non-metallic modular shelters in the nature of homes and stables; prefabricated non-metallic building elements in the nature of blocks, boards, beams, and floor tiles for on site assembly; non-metallic modular units in the nature of walls, roofs, ceilings, floors, doors and windows for constructing prefabricated buildings; non-metallic fencing panels; balustrades, not of metal; framework for building, not of metal; stairways, not of metal for use in buildings; insect and sunshade screens, not of metal; movable partitions of non-metallic materials for building; plant screens in the nature of trellis, not of metal; non-metal pickets; fence posts of non-metallic materials; garden stakes of non-metallic materials; non-metal fence stays; temporary floors, not of metal; non-metal rails