Businesses involved in building and repairing boats construct, maintain and restore vessels for leisure, commercial or specialist use. Boatbuilding may include working from plans to create a new vessel, assembling hulls and decks, fitting internal structures and installing or preparing systems for propulsion, steering, electrical supply and onboard services. Boats may be made from materials such as timber, steel, aluminium or reinforced plastics, with methods and facilities suited to the type and size of vessel. Repair work can range from routine maintenance and minor alterations to substantial structural restoration. Services may include inspecting hulls, repairing damage, treating corrosion or rot, replacing fittings, renewing coatings and carrying out work on engines, rigging, plumbing and electrical systems. Some businesses specialise in particular materials, vessel types or tasks, while others offer a broad range of boatyard services.