19 Drywall; Building panels, not of metal; Concrete walls for building; Construction materials, namely, non-metal flooring materials; Insulating glass for building; Insulating glass for construction purposes; Non-metal building flashing; Non-metal building materials, namely, panelized wall sections; Non-metal building panels incorporating acoustic insulation; Non-metal roofing; Non-metal roofing panels; Non-metal stairs; Non-metal wall claddings for building; Non-metal windows; Roof flashing, not of metal; Stone veneers