Steel, unwrought or semi-wrought; steel alloys; steel strip; hoop steel; steel wire; cast steel; steel sheets; steel pipes; steel tubes; anchor plates; tie plates; reinforcing materials, of metal, for concrete; washers of metal; strap-hinges of metal; floor tiles of metal; bars for metal railings; box fasteners of metal; bolts of metal; flanges of metal [collars]; cable joints of metal, non-electric; cable linkages of metal, non-electric; couplings of metal for chains; frames of metal for building; ducts of metal, for central heating installations; ducts and pipes of metal for central heating installations; pipes of metal, for central heating installations; nails; tacks [nails]; brads; wall plugs of metal; pillars of metal for building; water-pipes of metal; sleeves [metal hardware]; roof flashing of metal; elbows of metal for pipes; wire of common metal; drain pipes of metal; screws of metal; brackets of metal for building; window fasteners of metal; pipes of metal; tubes of metal; fittings of metal for windows; cast iron, unwrought or semi-wrought; fittings of metal for building; pins [hardware]; eye bolts; screw rings; brass, unwrought or semi-wrought; sheet piles of metal; pilings of metal; wall claddings of metal for building; flashing of metal for building; shutters of metal; wall linings of metal for building; lock bolts; ceilings of metal; floors of metal; linings of metal for building; roofing tiles of metal; rivets of metal; door panels of metal; beams of metal; girders of metal; joists of metal; platforms, prefabricated, of metal; hardware of metal, small; tanks of metal; reservoirs of metal; sills of metal; bolts, flat; roofing of metal; pipework of metal; steel buildings; wire of common metal alloys, except fuse wire; alloys of common metal; wainscotting of metal; reinforcing materials of metal for pipes; reinforcing materials of metal for building; building materials of metal; boxes of common metal; sealing caps of metal; cables of metal, non-electric;; collars of metal for fastening pipes; clips of metal for cables and pipes; binding screws of metal for cables; window frames of metal; greenhouse frames of metal; tiles of metal for building; tile floorings of metal; hinges of metal; framework of metal for building; door frames of metal; partitions of metal; buildings of metal; roof coverings of metal; gutter pipes of metal; water-pipe valves of metal; bindings of metal; nuts of metal; fences of metal; sheets and plates of metal; building panels of metal; ducts of metal for ventilating and air-conditioning installations; wire rope; wall tiles of metal; paving slabs of metal; slabs of metal for building; roofing of metal, incorporating photovoltaic cells; bathtub grab bars of metal; door fasteners of metal; cladding of metal for building; hot-rolled steel bars; bright steel bars; peeled metal bars; folding doors of metal; mouldings of metal for building; swing doors of metal; acoustic panels of metal

Ceiling lights; ceiling fans; ceiling light fixtures; ceiling light fittings; floor lamps; floor drains; under floor heating; environmental control installations for the purposes of lighting; emergency lights [battery-backed lighting installations]; lighting installations; bath plumbing fixtures; boiler pipes for heating installations; electrical boilers; flexible pipes being parts of sink plumbing installations; flexible pipes being parts of bath plumbing installations; flexible pipes being parts of shower plumbing installations; flexible pipes being parts of basin plumbing installations; swimming pool heaters; swimming pool filters; sewage disposal plants; sewage purification apparatus; wastewater purification installations

Soundproofing materials; flexible hoses, not of metal; insulating materials; compositions to prevent the radiation of heat; caulking materials; expansion joint fillers; fillers for expansion joints; chemical compositions for repairing leaks; gaskets; joint packings; insulating paper; insulating fabrics; foils of metal for insulating; metal foil for insulation; insulating paints; mineral wool [insulator]; glass wool for insulation; sealant; compounds for joints; plastic film, other than for wrapping; synthetic resins, semi-processed; artificial resins, semi-processed; reinforcing materials, not of metal, for pipes; plastic fibres, other than for textile use; fibreglass for insulation; glass fibres for insulation; fibreglass fabrics for insulation; insulating tapes; insulating plaster; insulating refractory materials; fittings, not of metal, for flexible pipes; fittings, not of metal, for rigid pipes

Roofing slates; hips for roofing; furrings of wood; balustrades, not of metal; bitumen; roofing shingles; folding doors, not of metal; concrete; concrete building elements; bituminous products for building; wood, semi-worked; building timber; lumber; plywood; manufactured timber; sawn timber; wood paving; wood veneers; veneers; veneer wood; wood panelling; cement; roof gutters, not of metal; bitumen paper for building; framework, not of metal, for building; mortar for building; grout; plaster; fireproof cement coatings; cement slabs; partitions, not of metal; buildings, not of metal; building paper; building glass; cornices, not of metal; mouldings, not of metal, for cornices; roof flashing, not of metal; angle irons, not of metal; windows, not of metal; doors, not of metal; roof coverings, not of metal; gutter pipes, not of metal; water-pipes, not of metal; water-pipe valves, not of metal or plastic; bituminous coatings for roofing; beams, not of metal; girders, not of metal; felt for building; stone; plate glass [windows] for building; clay; lintels, not of metal; buildings, transportable, not of metal; marble; mouldings, not of metal, for building; coatings [building materials]; wall claddings, not of metal, for building; flashing, not of metal, for building; shutters, not of metal; fences, not of metal; sheet piles, not of metal; wall linings, not of metal, for building; building stone; artificial stone; floors, not of metal; ceilings, not of metal; planks of wood for building; linings, not of metal, for building; roofing tiles, not of metal; gates, not of metal; joists, not of metal; terra-cotta [building material]; roofing, not of metal; rigid pipes, not of metal, for building; insulating glass for building; window glass, other than vehicle window glass; stained-glass windows; window glass for building; wainscotting, not of metal; reinforcing materials, not of metal, for building; safety glass; swimming pools [structures], not of metal; building materials, not; of metal; construction materials, not of metal; shuttering, not of metal, for concrete; paving blocks, not of metal; posts, not of metal; window frames, not of metal; tiles, not of metal, for building; floor tiles, not of metal; drain pipes, not of metal; drain traps [valves], not of metal or plastic; building panels, not of metal; geotextiles; vinyl siding; insect screens, not of metal; roofing, not of metal, incorporating photovoltaic cells; tile floorings, not of metal; wall tiles, not of metal; slabs, not of metal, for building; cladding, not of metal, for building; rubber bearings for seismic isolation of buildings; swing doors, not of metal; accordion doors, not of metal

Analysis, testing, evaluation and verification of products, components, materials, services, methods, and quality-control procedures of others to determine conformity with certification standards; analysis, testing, evaluation and verification of products, components, materials, services, methods, and quality-control procedures of others for compliance with codes, standards and guidelines related to the construction of building