Prefab Interior

Definition

The prefab interior names the prefabrication of interior elements and assemblages — interior components manufactured off-site as complete units, ranging from singular elements to whole interior systems — and the historiographic claim that this practice is prefab's suppressed core. Deborah Schneiderman's founding diagnosis is an omission: modern prefabrication's literature of over a century "has contained a notable omission," while "the techniques and applications of prefabrication of the interior have been evident for thousands of years," and "prefabrication in the built environment owes much of its advancement to concepts investigated in terms of interior architectural elements and components." The evolution of the prefab house "decidedly includes the development of ideas and integration of prefabricated interior components." The concept's spectrum runs from the singular element (the Sears kit houses' "interior lining that was essentially an early form of gypsum"; Wright's prefabricated frieze) through the complete assemblage (Buckminster Fuller's Dymaxion Bathroom, 1936 — the "forerunner that influentially fueled the subsequent specialty prefabrication market" and "a precursor to the pod bathrooms currently being designed and installed in buildings today") to the fully integrated house, where Schneiderman identifies three typologies "where the interior environment is truly integrated in the conceptualization of the prefabricated house": the Lustron House (built-ins as "programmed prefabricated space" in the same porcelain-enameled steel as the exterior), Shigeru Ban's Furniture House ("furniture and house are one"), and su11's Composite House (interchangeable add-ons). The three share "the notion that prefabrication was as critical to the interior as it was to the exterior."

The concept's two poles are production systems. The closed system (Lustron): everything "from windows to bathtubs, were designed specifically for the house" — nothing interchangeable, a "serious limitation" whose idiosyncratic 5 ft 1.5 in bathtub made cost-effective manufacture impossible and helped fold the company in 1950. The open system (Sears's optional kit elements, su11's interchangeable add-ons): components that interchange, plug in, and reconfigure — "the fabrication of modular, transportable, or interchangeable elements allows for adaptability and reuse, increasing the life of all the elements." The concept's evaluative climax is a hierarchy claim: in the advanced cases "the traditional design hierarchies have been eliminated, and the resultant form exists as an equalization of all elements" — interior, furniture, structure, and exterior as composite equals, with interior elements "elevated for programmatic necessity rather than decoration."

Key Thinkers

• Deborah Schneiderman — the concept's theorist: the prefab literature's "notable omission," the three integrated typologies (Lustron, Furniture House, Composite House), the closed/open system distinction, and the sustainability case for the interchangeable element.
• (Case designers engaged in the source, not yet paged — see log: Shigeru Ban, the Furniture House series; su11 architecture+design — Ferda Kolatan & Erich Schoenenberger, the Composite House and Composite Architecture; R. Buckminster Fuller, the Dymaxion Bathroom; Carl Koch, the Lustron redesign.)

Related Concepts

• Structural Furniture — the register's strongest claim: furniture elevated "from an object added to a room to a space-defining and structural element"; the prefab interior that carries the building.
• Kit of Parts — the component logic: the Sears kit house's optional interior lining, the corporate interior's demountable kit, the Furniture House module, and the closed system as the kit's failure mode.
• Add-on — su11's multi-programmed unit: the prefab interior as homeowner-selected, interchangeable, hierarchy-equalizing element; the shell minimized.
• Domestic Interior — the prefab house's site: built-ins that "defined space and provided the living program"; furniture elevated to structure; the dwelling as manufactured system.
• Flexible Interior — the kinship of the movable element: the Beechers' rolling screen and Lustron's plugged-in built-ins as space-making furnishings; the add-on's reconfiguration "over time."
• Machine for Living — the Lustron as the machine-house's most literal industrialization: porcelain-enameled steel throughout, mechanical innovations, inhabitation by magnet.
• Production Stream — the off-site/on-site geography: "Off-site production was specifically chosen because building the structural furniture in a controlled environment permits a higher level of craft and efficiency" — the factory-sited twin of Satterfield & Swackhamer's jobsite-sited production.
• Mass Customization — the customization pole: Lustron's failed mass production and su11's dimensioned, homeowner-configured, online-interface systems as the pre-digital and digital poles of the same economy.
• Sustainability — the register's contemporary warrant: off-site building's "reduced material waste and labor costs"; interchangeability "increasing the life of all the elements."
• Interior Architecture — the discipline whose prefab register this is: the interior's claim to be where prefabrication advanced.

Source Support

Sources in the wiki that discuss this concept:

• Inside the prefab house (Schneiderman 2018) — the source of the concept: the historiographic omission claim, the element-to-assemblage history (Manning Cottage, Sears lining, Wright's frieze, the Dymaxion Bathroom), the three integrated typologies (Lustron, Furniture House, Composite House), the closed-system failure analysis, and the sustainability closing.
• To dwell means to leave traces (Downey 2018) — the prefab interior's architect-built instance: Le Corbusier's Cabanon (1952), whose interior "draws on Le Corbusier's use of prefabricated built-in units, based on the dimensions of the Modulor… he had used three years earlier for Unité d'habitation in Marseilles. These 'interior shell' components were built by colleagues of Corbusier, and pioneers of industrial construction in their own right, Charles Barberis and Jean Prouvé, who had the sections made up in Ajaccio, Corsica," then "arranged the delivery of the presized pieces to the tiny house by boat in mid-1952" — a 3.66 m² dwelling assembled from factory-made, anthropometrically dimensioned interior units, "'Robinson Crusoe-ish' on the exterior," its interior "a tender poem to the rationality of early modernism." The case adds the bespoke-authorial extreme of the prefab spectrum (designed by its own occupant-architect, prototyped in a canonical housing project) and confirms Schneiderman's historiographic point from the modernist master's own practice: the interior's prefabrication as the site where modernism's industrial logic was most tenderly tested. See structural-furniture, machine-for-living, proportion.
• Hearts and minds and dishwashers (Larson 2018) — the prefab interior's diplomatic register: the shipped house as state exhibit, twice. In Berlin (1950), "a prefabricated suburban home shipped from Minneapolis was constructed by carpenters working around the clock. The resulting home, complete with carport, embodied the American promise that citizens benefitted more by supporting innovations than by pushing against them" — the prefab as "a patriotic reaffirmation of our way of life." In Moscow (1959), the finale prefab "bifurcated with a ten-foot aisle" — dubbed "Splitnik" for Sputnik — "replete with the American infrastructure that marked the middle class: a dishwasher, a combination freezer and refrigerator, a garbage disposal, and a countertop cooking range," through which "millions of visitors would pass in a mass consumption of, well, consumption." The register gives the prefab interior a new valence the Schneiderman production history lacks: the prefab house as persuasion machine — its manufactured completeness (appliances in, infrastructure fitted) the exact form in which a way of life could be shipped, assembled overnight, and walked through by rival populations (see kitchen-debate, soft-power, propaganda, cold-war).
• Designing a Place Called Home (Wentling 2017) — the manufactured-housing register, the concept's production-data companion: the economics ("under factory conditions, construction quality and costs can be controlled better for manufactured housing than for conventional field-built housing"; per-square-foot cost "about 50% less than site-built housing," p. 220–221); the decline data (shipments from ~575,000 in the mid-1970s — "close to one-quarter of all housing starts" — to ~64,000, about 9%, p. 220); the stigma diagnosis ("The public mistakenly associates manufactured housing with mobile homes"; box shapes and 4/12 trailer roofs, pp. 221–222); the design fix-list (hinged roof trusses raised on site, ordered fenestration, site-built porches and garages, veneered foundations, beams opening the modules, pp. 222–223); the built demonstrations — Shady Grove Hills's porches occupying "at least one-third the overall length of the façade," the Neighborhood at Fries Mill's Americana module variety, Schoolhouse Square's affordable modular townhouses, LivingHomes's LEED-certified 1,288-sq-ft houses (pp. 223–226); and the forecast — Berkshire Hathaway's acquisition of manufactured-housing companies as modular's mainstream signal (p. 226). Where Schneiderman gives the historiography and typologies, Wentling gives the market case: factory control beating site-built quality, defeated by stigma and trailer geometry — design as the difference (see prefab-interior, typology, technology-mitigation).

Open Questions

• Is the prefab interior the fabrication conception's completion or negation? Manack's interior fabricates its distinction from architecture; Schneiderman's integrates interior, furniture, structure, and exterior into "an equalization of all elements." Can one discipline carry both production programs at once?
• The Lustron case argues that closed-system integration kills prefab economics: is interoperability (the open kit) the hidden law of prefabrication — and does su11's shell-minimized system finally satisfy it?
• When homeowners inhabit enameled steel "utilizing magnets throughout the interior," user adaptation compensates for the manufactured interior's fixedness. Does the prefab interior therefore always need an inhabitation tactician (the magnet, the add-on selector) — and what discipline theorizes that occupant?
• The chapter's cases are all houses: does the prefab interior have a public history (the pod bathroom's descendants, the office kit of parts, the plug-in Composite Architecture element) that the domestic framing hides?
• If interior elements are "elevated for programmatic necessity rather than decoration," is the prefab interior the end of the decorative in the dwelling — or its industrialization (color as coding device, texture as designed emotion)?
• Larson's Cold War prefab (the Minneapolis house, Splitnik) shows the prefab interior deployed as diplomacy — its manufactured completeness as the shippable form of a way of life. Does the prefab's persuasiveness depend on its completeness (nothing left to the occupant, hence nothing left to chance) — and is that the same completeness Schneiderman's open-system pole (the interchangeable add-on) deliberately abandons? See kitchen-debate, hearts-and-minds.