19 Non-metallic building materials, namely, roof flashing, wood trusses and laminated columns; non-metallic wall and ceiling panels for use in building; non-metallic structural building systems comprising non-metal partitions and panels for building, shores, supports and braces, non-metal panels for building, namely, floor panels; non-metal building materials, namely, fascia, soffits, door castings, not of metal; door frames, not of metal; door jambs, not of metal; door panels, not of metal; decking boards, not of metal; non-metal air conditioning ducts; non-metal building flashing; non-metal building materials, namely, soffits; non-metal castings; non-metal cladding for construction and building; non-metal doors; non-metal ducts not for electrical circuitry; non-metal expansion joints for floors and walls; non-metal floor tiles; non-metal floors; non-metal girders; non-metal gutters; non-metal heating ducts; non-metal roof trusses; non-metal roofing; non-metal roofing hips; non-metal roofing panels; non-metal roofing tiles; non-metal tiles; non-metal ventilating ducts; non-metal window frames; non-metal windows; non-metallic rigid pipes for building; non-metallic transportable buildings