19 Building materials, not of metal, namely, fly ash, semi-worked woods and concrete poles; rigid pipes, not of metal, for building; roof flashing, not of metal; angle irons, not of metal; lintels, not of metal; scaffolding, not of metal; reinforcing materials, not of metal, for building; concrete; reeds for building, namely, non-metal posts for building; kits for building prefabricated houses, not of metal; shuttering, not of metal, for concrete; cement; asbestos cement; magnesia cement; cement for blast furnaces; cement for furnaces; advertisement columns, not of metal; roofing, not of metal; roofing, not of metal, incorporating solar cells; roof coverings, not of metal; buildings, transportable, not of metal; prefabricated buildings, not of metal; concrete building elements, namely, concrete walls for building; cement slabs; paving blocks, not of metal; mortar for building; refractory construction materials, not of metal; materials for making and coating roads, namely, road asphalt, tar-based asphalt sealants; road coating materials, namely, tar coatings for use on pavements; decorative moldings, not of metal, for use in building construction; framework, not of metal, for building; sheet piles, not of metal; cement posts; posts, not of metal; building panels, not of metal; props, not of metal, namely, plastic pipe supports; gates, not of metal; joists, not of metal; cladding, not of metal, for building; wainscotting, not of metal; wall claddings, not of metal, for building; ceilings, not of metal; slabs, not of metal for building; beams, not of metal; non-metal hips for roofing; scantlings, namely, building timber for carpentry; gutter pipes, not of metal; drain pipes, not of metal; sandstone pipes; branching pipes, not of metal