Businesses in this category fit fixed fixtures and fittings in homes and commercial premises, either as part of a refurbishment or as a standalone installation. Work may include fitting sinks, taps, baths, showers, toilets and other bathroom sanitaryware, as well as kitchen units, worktops, cabinets, shelving, doors, handles and other built-in items. The exact services offered vary, and some businesses specialise in particular rooms, products or materials. Customers can typically expect advice on positioning and measurements, removal of existing fittings where agreed, preparation of surfaces and installation of the new items. Work may also involve connecting water supplies and waste pipes, sealing joints, adjusting doors or drawers, and making good around the installation. Electrical connections, gas work and structural alterations are separate regulated or specialist tasks; where these are needed, an appropriately qualified tradesperson may be required.