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...