19 Non-metallic building materials, namely, wall panels, doors, windows; nonmetallic rigid pipes for building; asphalt, pitch and bitumen; non-metallic transportable buildings; alabaster; non-metallic lintels; roofing slates; nonmetallic scaffolding; door frames, not of metal; plywood; non-metal hips for roofing; roofing, not of metal; roof coverings, not of metal; building glass; insulating glass for building purposes and for construction purposes; veneer wood; window frames, not of metal; wood paving, namely, slabs of wood; wood in the nature of wood beams, wood door and window frames, wall panels not of metal for construction purposes; semi-worked wood; marble; tiles not of metal for building; building stones; non-metallic doors; door panels not of metal; wainscotting, not of metal; wooden floor boards; shutters not of metal, namely, non-metal exterior building shutters, non-metal window shutters; ceilings, not of metal, in the nature of nonmetal ceiling tiles, non-metal ceiling panels; partitions, not of metal, namely, nonmetal sliding doors and non-metal sliding wall panels; beams, not of metal; non-metal door frames; non-metal window frames; non-metal wall panels; wall panel surface finish materials of melamine, laminates, vinyl, fabric, wood, cork, reed, cane, wicker, horn, bone, ivory, whalebone, shell amber, mother of pearl, meerschaum and substitutes for all these materials, or of plastics, namely, non-metal laminate panels for floors, walls and millwork, exclusive of cabinets