Building materials and elements not of metal for saunas, namely, doors, windows, bench materials being bench boards, wall boards, flooring, and ceiling materials being ceiling boards, all made of wood; building components of wood in the nature of blocks, boards, beams, and floor tiles; planks of wood for building; porches, not of metal, for building; portable and modular non-metallic constructions in the nature of arbors, garden shelters, summer houses, and maisonettes; non-metallic transport...