19 Building and construction materials and elements, not of metal; angle irons, not of metal; roof flashing, not of metal; woven mats (non-metallic -) for use as geotextile materials for building purposes; asphalt [for building purposes]; planks of non-metallic materials for use in construction; laminated boards (non-metallic -) for building use; building boards of plastics materials; bamboo, for building; hydrated lime for building purposes; street gutters, not of metal; waterproofed paper for use in building; fibreboard for building; waterproofed cardboard for use in building; casings (non-metallic -) for use in building or construction; non-metallic trestles for use in construction; ready-to-use cement for building purposes; pillars, not of metal, for building; plywood for building; building components of imitation wood; building components of wood; bitumen based compositions for building purposes; ventilating ducts (non-metallic -) for use in building; plastic conduits for drainage; flashings (non-metallic -) for waterproofing buildings; flashing, not of metal, for building; glass elements for building panels; prefabricated building components (non-metallic -); structural elements (non-metallic -) for use in building; building fronts (non-metallic -); asphalt felt [for building purposes]; cladding sheets (non-metallic -); gypsum [building material]; expansion joints of non-metallic materials for use in construction; mineral pellets for use in the building industry; drain gullies, not of metal; drainage installations (non-metallic -); laminates of non-metallic materials for use in building; wired plate glass for building; figured plate glass for building; common sheet glass for building; building panels, not of metal; adhesive mortar for building purposes; fire protection materials (non-metallic -) for use in building; bitumen building materials; foundation material (non-metallic -) for use in construction; sheet glass for use in building; building materials, not of metal; expanded plastics for use in construction; non-metallic minerals for building or construction; minerals for use in construction; mouldings, not of metal, for building; glass mosaics for use in building construction; framework, not of metal, for building; concrete poles for use as building materials; interlocking panels (non-metallic -) for building; fire retardant panels (non-metallic -) for use in construction; polystyrene panels for use in building; glass panels for building construction; multilayer panels of plastic for use in building; translucent building panels made from plastics materials; transparent plastic panels for building construction purposes; particle board for use in construction; plastic panels for use in building; glass powder for building purposes; sumps (non-metallic -) [structures]; bitumen products for use as building preservatives; rock crystal for use as building materials; woven covers (non-metallic -) for use as geotextile materials for building; non-metal cladding for construction and building; sand for use in construction; staircases; staircases, not of metal; silica for use in building; erosion control fabrics; structural frameworks (non-metallic -) for buildings; reinforcing fabrics (non-metallic -) for building; drain pipes, not of metal; tuff for use as building materials; building glass; window glass for building; wicker, for building; rigid pipes, not of metal, for building; pitch for building; pitch, tar, bitumen and asphalt; doors, gates, windows and window coverings, not of metal; ventilation grilles (non-metallic -) for fitting in doors.