Prefabricated home

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Construction of a prefabricated modular home (see also time-lapse video) Prefabricated house construction.gif
Construction of a prefabricated modular home (see also time-lapse video)

Prefabricated homes, often referred to as prefab homes or simply prefabs, are specialist dwelling types of prefabricated building, which are manufactured off-site in advance, usually in standard sections that can be easily shipped and assembled. Some current prefab home designs include architectural details inspired by postmodernism or futurist architecture.

Contents

Uninhabited prefabricated council houses in Seacroft, Leeds, UK South Parkway2.jpg
Uninhabited prefabricated council houses in Seacroft, Leeds, UK

"Prefabricated" may refer to buildings built in components (e.g. panels), modules (modular homes) or transportable sections (manufactured homes), and may also be used to refer to mobile homes, i.e., houses on wheels. Although similar, the methods and design of the three vary widely. There are two-level home plans, as well as custom home plans. There are considerable differences in the construction types. In the U.S., mobile and manufactured houses are constructed in accordance with HUD building codes, while modular houses are constructed in accordance with the IRC (International Residential Code).

History

"Loren" Iron House, at Old Gippstown in Moe, Australia "Loren" Iron House, Old Gippstown.JPG
"Loren" Iron House, at Old Gippstown in Moe, Australia

The first mention of a prefabricated building was in 1160 to 1170 by Wace as confirmed by Pierre Bouet. In the special May/June 2015 edition of the French magazine Historia, he spoke of a castle transported by Normans in 'kit' form.[ citation needed ] According to Bouet, Wace's epic poem Roman de Rou, verses 6,516–6,526, states: "They took out of the ship beams of wood and dragged them to the ground. Then the Count (Earl) who brought them, (the beams) already pierced and planed, carved and trimmed, the pegs (raw-plugs/dowels) already trimmed and transported in barrels, erected a castle, had a moat dug around it and thus had constructed a big fortress during the night."

Movable structures were used in 16th century in India by Emperor Akbar The Great. These structures were reported by Arif Qandahari in 1579. [1]

In the United States, several companies, including Sears Catalog Homes, began offering mail-order kit homes between 1902 and 1910. [2] The Forest Products Laboratory, a division of the U.S. Forest Service, put extensive research into prefabricated homes in the 1930s, including building one for the 1935 Madison Home Show. [3] This research continued into the 1960s.

In the early to mid-1960s, a line of inexpensive Leisurama prefabricated houses designed by Andrew Geller, were made available for purchase from a display on the ninth floor of Macy's in New York City and shown at the 1964 New York World's Fair. The precursor to the final design had been shown in Moscow in 1959 provoking the noted Kitchen Debate between Vice President Richard Nixon and Soviet Premier Nikita Khrushchev. Over 200 Leisurama houses were built at the Culloden Point development in Montauk, New York between 1963 and 1965.

By 1958, roughly 10 percent of new houses in the United states were prefabricated. [4]

Contemporary domestic prefabrication

An example of a completed panelized home in Lake Whatcom, United States. Stillwater Dwellings Lake Whatcom Luxury Prefab.jpg
An example of a completed panelized home in Lake Whatcom, United States.

Currently, the prefabricated housing industry is divided by methodology of construction. Panelized, Modular, and Manufactured home design make up the majority of contemporary firms, with considerable overlap between the construction methods. [5]

Panelized homes

Panelized homes (also referred to as system built homes), construct the structural components, or "panels", of a home (walls, roof and floor systems) in an off site factory where the panels are cut via automated saws and laser cutters from large wooden sheets, allowing for lower amount of waste compared to site-built construction. [6] Following their cutting and shaping, panels are stacked and delivered to the jobsite where the home is assembled piecemeal in a similar method to traditional site-built home.[ citation needed ]

Panelized homes are generally considered a halfway between more traditional site-built home and more manufactured prefabs, with the flexibility of site-build and efficiency of prefab. [5]

Modular Houses

Modular houses are built using a system that involves a sequential process in which modern techniques such as 3D digital modeling are now being used, which allows for pre-planning to make the process more efficient. [7] [8]

This type of construction is typically up to 50% faster and requires up to 50% less materials than conventional or traditional construction. [9] The size of the global modular construction market is expected to reach USD 271 billion by 2028. [10]

North America

United States

Prefabricated housing unit in storage in Claymont, Delaware Modular Housing Unit.jpg
Prefabricated housing unit in storage in Claymont, Delaware

The total market share of non-site built single-family homes (modular and panelized) was at 3% of single-family completions in 2020, according to Census Bureau Survey of Construction data and NAHB analysis. [11] This share is expected to rise moderately in 2021.

Europe

German-manufactured Huf Haus near West Linton, Scotland. Huf Haus in Scotland.jpg
German-manufactured Huf Haus near West Linton, Scotland.

In the 1940s French designer Jean Prouvé designed an aluminum prefabricated house, the Maison Tropicale, for use in Africa. [12]

After the World War II until 1948, Sell-Fertighaus GmbH built over 5,000 prefabricated houses in Germany for the occupying force of the United States.[ citation needed ]

There is no pan-EU housing standard for this kind of home construction, and regulation is at the national level. EU directives that apply to housing construction and design do not directly affect the modular home sector.[ citation needed ] However, each modular home must comply with EU's Eurocodes and local building codes.[ citation needed ]

United Kingdom

A post-Second World War English prefabricated house, adjoining a similar property reconstructed in brick Prefabricated House Arnold Nottinghamshire.JPG
A post-Second World War English prefabricated house, adjoining a similar property reconstructed in brick

In the United Kingdom, the word "prefab" is often associated with a specific type of prefabricated house built in large numbers after World War II, [13] such as Airey houses, as a temporary replacement for housing that had been destroyed by bombs, particularly in London. More than 156,000 prefabricated homes were built between 1945 and 1948. [14] Prefabs were also built in World War I, such as the still-occupied houses in Austin Village, Birmingham.

Despite the intention that these dwellings would be a strictly temporary measure, many remained inhabited for years and even decades after the end of the war. A small number are still in use in the 21st century, but others are being demolished. In 2011 it was announced that Britain’s largest remaining prefab estate of 187 homes in Lewisham, South-East London, was to be redeveloped except for six homes. [15]

MMC and modular homes

During the 2010s, as government backing (including via Homes England) for 'modern methods of construction' (MMC) grew, several UK companies (for example, Ilke Homes, L&G Modular and Homes by Urban Splash) were established to develop modular homes as an alternative to traditionally-built residences. A development of 36 apartments, called y:cube, was constructed by SIG Plc Building Systems for the YMCA in Mitcham, South London in 2015. [16] From its Knaresborough, Yorkshire factory (opened in 2018, closed in 2023), Ilke Homes delivered two- and three-bedroom 'modular' homes that could be erected in 36 hours. [17]

In January 2024, following the high-profile failures of Ilke Homes, L&G Modular and Homes by Urban Splash during 2022 and 2023, the House of Lords Built Environment Committee highlighted that the UK Government needed to take a more coherent approach to addressing barriers affecting adoption of MMC: "If the Government wants the sector to be a success, it needs to take a step back, acquire a better understanding of how it works and the help that it needs, set achievable goals and develop a coherent strategy." [18] [19] [20]

Australia and Asia

In 2010, Bali exported 98,417 prefabricated houses, but in 2011 the region only exported 5,007 units due to the global economic slowdown that affected a number of export destinations. These Balinese prefab houses are well known for their artistic design and practical value. [21]

See also

Related Research Articles

<span class="mw-page-title-main">Lustron house</span> House type

Lustron houses are prefabricated enameled steel houses developed in the post-World War II era United States in response to the shortage of homes for returning G.I.s by Chicago industrialist and inventor Carl Strandlund. Considered low-maintenance and extremely durable, they were expected to attract modern families who might not have the time or interest in repairing and painting conventional wood and plaster houses. Lustron production ceased in 1950 due to the company's inability to pay back the startup loans it had received from the Reconstruction Finance Corporation. Over 2,000 homes were constructed during the Lustron's brief production period, and many remain in use today. Several have been added to the National Register of Historic Places.

<span class="mw-page-title-main">Mobile home</span> Prefabricated structure attached to a chassis

A mobile home is a prefabricated structure, built in a factory on a permanently attached chassis before being transported to site. Used as permanent homes, or for holiday or temporary accommodation, they are often left permanently or semi-permanently in one place, but can be moved, and may be required to move from time to time for legal reasons.

<span class="mw-page-title-main">Modular building</span> Prefabricated building or house that consists of repeated sections

A modular building is a prefabricated building that consists of repeated sections called modules. Modularity involves constructing sections away from the building site, then delivering them to the intended site. Installation of the prefabricated sections is completed on site. Prefabricated sections are sometimes placed using a crane. The modules can be placed side-by-side, end-to-end, or stacked, allowing for a variety of configurations and styles. After placement, the modules are joined together using inter-module connections, also known as inter-connections. The inter-connections tie the individual modules together to form the overall building structure.

Prefabrication is the practice of assembling components of a structure in a factory or other manufacturing site, and transporting complete assemblies or sub-assemblies to the construction site where the structure is to be located. Some researchers refer it to “various materials joined together to form a component of the final installation procedure“.

<i>Dwell</i> (magazine) Magazine

Dwell is a design and technology brand. It was launched with a magazine in October 2000 by CEO Lara Hedberg Deam with architecture and design critic Karrie Jacobs as its editor-in-chief. In August 2002, Jacobs left the magazine and was replaced by senior editor Allison Arieff. After Arieff, Sam Grawe held the position from 2006 to 2011, followed by Amanda Dameron from 2011 to 2017. William Hanley became the editor-in-chief in 2019.

<span class="mw-page-title-main">Manufactured housing</span> Type of prefabricated housing

Manufactured housing is a type of prefabricated housing that is largely assembled in factories and then transported to sites of use. The definition of the term in the United States is regulated by federal law : "Manufactured homes are built as dwelling units of at least 320 square feet (30 m2) in size with a permanent chassis to assure the initial and continued transportability of the home." The requirement to have a wheeled chassis permanently attached differentiates "manufactured housing" from other types of prefabricated homes, such as modular homes.

<span class="mw-page-title-main">Home construction</span> Process of constructing a home

Home construction or residential construction is the process of constructing a house, apartment building, or similar residential building generally referred to as a 'home' when giving consideration to the people who might now or someday reside there. Beginning with simple pre-historic shelters, home construction techniques have evolved to produce the vast multitude of living accommodations available today. Different levels of wealth and power have warranted various sizes, luxuries, and even defenses in a "home". Environmental considerations and cultural influences have created an immensely diverse collection of architectural styles, creating a wide array of possible structures for homes.

<span class="mw-page-title-main">Portable building</span> Building designed to be movable

A portable, demountable or transportable building is a building designed and built to be movable rather than permanently located.

<span class="mw-page-title-main">Prefabricated building</span> Building constructed using prefabrication

A prefabricated building, informally a prefab, is a building that is manufactured and constructed using prefabrication. It consists of factory-made components or units that are transported and assembled on-site to form the complete building. Various materials were combined to create a part of the installation process.

Offsite construction refers to the planning, design, manufacture and assembly of building elements at a location other than their final installed location to support the rapid speed of, and efficient construction of a permanent structure. Such building elements may be prefabricated offsite in a different location and transported to the site or prefabricated on the construction site and then transported to their final location. Offsite construction is characterized by an integrated planning and supply chain optimization strategy. Offsite manufacturing (OSM), offsite production (OSP) and offsite fabrication (OSF) are terms used when referring primarily to the factory work proper.

<span class="mw-page-title-main">Cemesto</span>

Cemesto is a sturdy, lightweight, waterproof and fire-resistant composite building material made from a core of sugarcane fiber insulating board, called Celotex, surfaced on both sides with asbestos cement. It was originally developed by the Celotex Corporation and first introduced to the market in 1937.

<span class="mw-page-title-main">Homes England</span> Public body that funds new affordable housing in England

Homes England is the non-departmental public body that funds new affordable housing in England. It was founded on 1 January 2018 to replace the Homes and Communities Agency (HCA). HCA in turn was established by the Housing and Regeneration Act 2008 as one of the successor bodies to the Housing Corporation, and became operational on 1 December 2008.

<span class="mw-page-title-main">Modular construction</span> Construction technique

Modular construction is a construction technique which involves the prefabrication of 2D panels or 3D volumetric structures in off-site factories and transportation to construction sites for assembly. This process has the potential to be superior to traditional building in terms of both time and costs, with claimed time savings of between 20 and 50 percent faster than traditional building techniques.

Joseph Tanney is an American architect based in New York City. He is known for his work in prefabricated housing. He gained international attention with the Dwell Home, the winner of a 2003 international competition, which is considered a modern prefab icon.

<span class="mw-page-title-main">Prefabs in the United Kingdom</span>

Prefabs were a major part of the delivery plan to address the United Kingdom's post–World War II housing shortage. They were envisaged by war-time prime minister Winston Churchill in March 1944, and legally outlined in the Housing Act 1944.

Archimede construction systems are construction techniques achieving rhombic dodecahedral shapes, a space-filling geometry. In America, most of these systems generate building envelopes made up of as little as two panel shapes and sizes, this feature allowing for maximum industrialization. These panels are generally pressure injected with a rigid structural insulating foam like polyurethane. In Europe and Asia, post and beam structure often create a dodecahedral shape that is later filled with different cladding materials. Although the basic geometry sometimes contains an entire house, most applications of the system are an agglomeration of cells each forming a rhombic dodecahedral living space that can be a room or a larger living area when combined with adjacent dodecahedral modules.

<span class="mw-page-title-main">Council house</span> Form of public or social housing in the United Kingdom

A council house or council flat is a form of British public housing built by local authorities. A council estate is a building complex containing a number of council houses and other amenities like schools and shops. Construction took place mainly from 1919 after the Housing Act 1919 to the 1980s, with much less council housing built since then. There were local design variations, but they all adhered to local authority building standards. The Housing Acts of 1985 and 1988 facilitated the transfer of council housing to not-for-profit housing associations with access to private finance, and these new housing associations became the providers of most new public-sector housing. The characterisation of council houses as 'problem places' was key for leading this movement of transferring public housing stock to the private arena. By 2003, 36.5% of the social rented housing stock was held by housing associations.

Resolution: 4 Architecture (RES4) is a ten-person architecture firm based in New York City, founded by architects Joseph Tanney and Robert Luntz in 1990. The firm is most recognized for their work on prefabricated housing and mass customization of the single-family house.

Ilke Homes was a UK housebuilder specialising in modular homes for both social housing and for open market sale and private rental. Established in 2017, it went into administration in June 2023, owing £320 million and making over 1,100 workers redundant.

Modern methods of construction (MMC) is a term used in the UK construction industry to refer to "smart construction" processes designed to improve upon traditional design and construction approaches by focusing on component and process standardisation, design for manufacture and assembly (DfMA), prefabrication, preassembly, off-site manufacture and onsite innovations such as additive manufacture. While such modern approaches may be applied to infrastructure works and to commercial or industrial buildings, MMC has become particularly associated with construction of residential housing.

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