19 Reinforcing building materials, not of metal, for building; window glass for building; building glass, insulating glass for building; window glass except glass for vehicle windows, namely, window glass for building; stained-glass windows; transportable greenhouses not of metal; horticultural frames not of metal, namely, non-metal greenhouse frames; building materials, not of metal, namely, glass mosaics for use in building construction, foam glass for building, wired plate glass for building, figured plate glass for building, luminous glass for building, enameled glass for building, color coatings sold as an integral component of glass panels for building purposes, glass panels for building purposes, glass blocks for building, glass tiles, modified sheet glass for building, safety glass for building purposes, non-metal stairs, fiberglass panels, floor boards; roofing, not of metal; window frames, not of metal; door frames, not of metal; roof coverings, not of metal; building timber; materials for making and coating roads, namely, glass granules for marking roads, portable non-metal; framework, not of metal, for building, not for insulation or acoustical purposes; angle irons, not of metal; linings, not for insulation or acoustical purposes, namely, refractory furnace linings, tiles, panels, not of metal, for building; staircases, not of metal; artificial stone