19 Structures being portable building and transportable buildings, not of metal; building and construction materials and elements, not of metal, in the nature of gypsum and calcium silicate building materials, non-metal materials for constructing floors, walls and ceilings; prefabricated buildings, not of metal; transportable, not of metal; building timber; non-metallic civil engineering structures, for building and construction, namely, engineered pre-assembled frames for building and construction; non-metallic frames being nonmetal framework for building for use with partitions; framework, not of metal, for building; non-metallic modular building units, namely, non-metal modular homes comprised of wood; modular homes, not of metal; non-metallic modular units being modular nonmetal structures with a pre-assembled frame for public sector for constructing prefabricated buildings; prefabricated houses kits, not of metal, comprised primarily of non-metal modular homes and also including modular pre-assembled frames not of metal; prefabricated non-metal buildings; structural frameworks, not of metal, for buildings; transportable buildings of timber; gypsum for use as building materials; intumescent building materials, namely, fire resisting plasterboard; fiberboard being building materials; building and construction materials and elements in the nature of sheathing made of wood and artificial wood; drywall; gypsum boards for construction purposes; fibre cement; sheathing boards, not of metal; roofing materials being roof boards and insulation not of metal, for building purpose; non-metallic cladding materials being non-metal cladding for building; non-metallic flooring in the name of boards and insulation; ceilings, not of metal; non-metallic wall panels