19 Non-metallic building materials; non-metallic portable and pre-fabricated buildings and their components; concrete building materials, namely, blocks, bricks, poles, slabs, panels; wood beams, parquet wood flooring, wood joints, wood joists, wood moldings, wood paneling, wood posts, wood siding, polyethylene board material used as a wood substitute, wood tile flooring, wood trim, wood veneer, wooden bridges, shaped wood, non-metal wainscoting, paneling, woodwork, woodchip, non-metal tiling, non-metal tiles, non-metal floor, non-metal stairs, non-metal stair treads and steps, furrings of wood, wood paving, non-metal laths, parquet floor boards, planks; wood for building; wood skirting board, non-metal skirting board