Prefabricated houses and living spaces in the nature of prefabricated non-metal buildings , not of metal or predominantly of metal; structures in the nature of prefabricated non-metal buildings, the foregoing not of metal or predominantly of metal; arbors not of metal; non-metallic modular building units in the nature of prefabricated non-metal buildings, the foregoing for the construction of prefabricated structures; manufactured housing, namely, mobile homes not of metal; non-metallic or predominantly non-metallic building materials and building elements, namely, non-metal building materials in the nature of soffits and fascia; transportable structures, not of metal or predominantly of metal, namely, wall panels, wall boards and elements for walls and other such materials and structures for building in the nature of non-metal wall claddings for building