Building materials, not of metal, namely, building materials for ceilings, for wall coverings, and for floor coverings in the nature of panels, boards, and tiles of wood or wood substitutes; fiber boards as building materials, namely, chipboard, oriented strand board, medium density fiber board, high pressure laminate flooring, and laminate flooring; structural and architectural members formed of pressed wood fibers; floors not of metal; cladding not of metal for building purposes