Non-metallic building and construction materials and elements, namely, thermally treated lumber and semi worked woods, chemically treated lumber and semi-worked woods, balustrades, floor boards, fascia, soffits, semi-worked woods, composite panels composed primarily of nonmetal materials, flooring materials, stair nosing, dry wall corner bead, composite panels consisting of a rigid expanded polystyrene core bounded to an outer skin of MDF (medium-density fibreboard) wood sheet, frameworks for...