Building and construction materials and elements, not of metal, namely coverings for ceilings and roofs made of wood fibre for use in building construction, moldings for doors and windows, flashing, floor boards, beams, elbows for construction purposes being building brackets, and profiles in the nature of framework for building purposes; wood-based or wood fibre construction materials, namely, wood-based floor boards, wood-based wall boards, and wood-based ceilings; intumescent construction ...