19 Building materials of wood, in particular solid and natural wood boards, planks, beams, sawn timber, plywood boards, planed timber, wall covering tiles of wood, ceilings of wood, ceiling elements in the nature of ceiling panels of wood, ceiling tiles of wood, wooden supports and wood joists; floors, not of metal, floorboards of wood, laminated timber; non-metal house parts, namely, soffits, fascia, non-metal hips for roofing, wall claddings not of metal for building; wall elements, namely, wall boards, wall stone; roof elements, namely, non-metal roofing panels, roofing boards; prefabricated homes, holiday homes and industrial buildings, all being non-metal; building materials and building elements, namely, semi-worked woods, gypsum; non-metal doors, non-metal gates, non-metal windows and window coverings, namely, non-metal window shutters, non-metal window screens, non-metal roofs, outdoor roller blinds of wood; room units, namely, transportable buildings of wood; parts and accessories for all the aforesaid non-metal goods, namely, roofing membranes, flooring underlayments; cladding for buildings, not of metal; prefabricated non-metal buildings