Non-metallic building and construction materials and components; non-metallic rigid pipes for building; non-metallic buildings and transportable buildings; static buildings and portable buildings made principally of non-metallic materials; modular buildings made principally of non-metallic materials; non-metallic structural frameworks for buildings; walls and panels for buildings made of non-metallic materials; modular building units made of non-metallic materials for the construction of buildings; prefabricated buildings made principally of non-metallic materials