Non-metallic buildings; prefabricated, transportable and portable non-metallic houses, buildings and structures; non-metallic mobile homes; non-metallic building frameworks; non-metallic building products, parts, elements, fittings and components; prefabricated non-metallic building products, parts, elements, fittings and components; non-metallic building materials including but not limited to non-metallic beams, blocks, panels, sheets, slabs, strips, cladding, castings, coverings, facings, pillars, finishings and insulation components; non-metallic building materials for slating; non-metallic building materials; parts and fittings for all the aforesaid goods