Manufactured housing (known in some countries, including the United Kingdom, as prefab housing) is a type of housing unit that is largely assembled in factories and then transported to sites of use. Prefabricated homes, often referred to as prefab homes, are dwellings manufactured off-site in advance, usually in standard sections that can be easily shipped and assembled. Many of the current prefab home designs on the market have jovial, eclectic elements of postmodernism or the clean, simple lines of futurism. Prefab homes have not been particularly marketable; possible reasons for this include: