A Science of Buildings That Can Grow—And Melt Away
Architect Neri Oxman, creator of ‘material ecology,’ explains how silkworms, shrimp shells and insect exoskeletons could help shape the city of the future.
Architect Neri Oxman, creator of ‘material ecology,’ explains how silkworms, shrimp shells and insect exoskeletons could help shape the city of the future.
While the pandemic heightened speculation about what the city of the future will look like, architect Neri Oxman says she is sticking with a blueprint based on a core principle of her work: In years to come, buildings will be grown, not built.
At Massachusetts Institute of Technology’s Media Lab from 2010 to 2021, Ms. Oxman founded and directed the Mediated Matter group, a team researching in areas including computational design, digital fabrication, materials science and synthetic biology. There, she created a field she calls material ecology.
The result? A body of work that includes a pavilion spun by 6,500 silkworms (with the help of a robotic arm), a series of 3D-printed sculptures filled with liquid channels of the pigment melanin (which she envisions could be used in the façades of buildings to protect against ultraviolet rays), and a collection of artifacts constructed using materials derived from shrimp shells and insect exoskeletons.
Since leaving academia, Ms. Oxman, 46 years old, has focused on Oxman, the New York-based design and technology company that she founded in 2020 with the aim of applying her design philosophy to real-world projects. A retrospective of her work is on display at the San Francisco Museum of Modern Art. The Wall Street Journal spoke to Ms. Oxman about the future of urban architecture and how she thinks design can be used as a tool to fight climate change.
The idea behind material ecology is to enable total synergy between grown and built environments by deploying new digital technologies that allow us to augment bio-based materials for large-scale construction.
It comes down to ethics and availability. We work with the most abundant biopolymers on the planet which include cellulose, found in plant cell walls; pectin, found in apple and lemon skins; and chitin, found in the shells of crustaceans.
Using technology, we can program biomaterials to degrade in response to changing environmental conditions. At MIT, we built three biopolymer pavilions [the Aguahoja pavilions] which, instead of concrete, were built using shrimp shells, fallen leaves and apple skins. We programmed the pavilions to decay at a certain point when exposed to rainwater. This, in turn, nurtures soil microorganisms to fuel new growth.
It’s a circular economy of material that could be used to create biodegradable refugee camps, for example. Once the refugees find a safe haven, the camps would be programmed to melt away in the rain.
It’s complex. When we combine biopolymers including chitosan, pectin and cellulose, the material’s ability to absorb water varies based on its composition. Chitosan, for example, is naturally water-resistant and doesn’t readily dissociate when submerged, while pectin is hydrophilic and dissolves rapidly. By choosing how we blend these components, we can access a spectrum of hydrophilicity—otherwise known as a material’s affinity to water—and this lets us tune or program the speed at which a material breaks down. In essence, we are designing the architectural equivalent of metabolic rate.
For grown buildings to appear in towns and cities, we need to rethink mass production, and this will take five to 10 years to happen in a meaningful way. However, the development of products made from biological materials—cars, for example—could begin within the next year.
The architect and professor Carl Elefante says that “the greenest building is one that is already built.” That’s because the carbon emitted during construction is vast compared to the operating emissions of a given building. We therefore need to find new ways to augment the pre-existing built environment rather than trying to completely rebuild our cities from the ground up.
We need to look at a range of interventions. One is the creation of bioengineered façades for existing buildings. An example: in the U.S. alone, hundreds of billions of square feet of glass façade components are produced every year. As part of our research at MIT, we 3D-printed glass augmented with synthetically engineered microorganisms to produce energy [from the sun]. This allows us to develop solar-harnessing glass façades that can act as a skin for pre-existing buildings.
We must also think about whole-building recycling. A current example is Apple’s headquarters in Cupertino, Calif. The campus was built by Norman Foster using materials from old buildings that used to be on the same site. Rather than simply destroying structures when we no longer have use for them, we must look for ways to augment them using new technology and intelligence.
The architect of the future is interested in formation, as much as she is interested in form. She is a systems thinker, interested in building relationships between objects rather than seeing them as standalone. She invents new technologies with which to design, manufacture and build. She is a gardener, not a master planner
Reprinted by permission of The Wall Street Journal, Copyright 2021 Dow Jones & Company. Inc. All Rights Reserved Worldwide. Original date of publication: April 10, 2022.
This stylish family home combines a classic palette and finishes with a flexible floorplan
Just 55 minutes from Sydney, make this your creative getaway located in the majestic Hawkesbury region.
Amrish Maharaj undid a century of hodgepodge alterations while navigating strict conservation rules
Haberfield, a charming slice of suburbia in what locals call Sydney’s “inner west” region, is miles from the landmarks like the Harbour Bridge and the Opera House, and isn’t famous for multimillion-dollar waterfront mansions. What it is known for, however, is fiercely protecting its architectural identity.
After an uproar in the 1970s led by local residents—who were fed up with period homes getting unsympathetic makeovers—the National Trust created the Haberfield heritage conservation area in the mid-1980s. As a result, the suburb of approximately 6,500 people has one of Sydney’s best-kept streetscapes.The heritage designation has been a win for preserving the past, but has created challenges for architects tasked with making Haberfield’s homes more family-friendly, sustainable and sellable.
Architect Amrish Maharaj was hired by his clients, owners Ramy and Sarah Azzam of ML Constructions, to modernise a single-storey Federation dwelling—an era of Australian architecture between approximately 1890 and 1915. Although its bones dated back to the turn of the last century, the Haberfield home, coined Glencoe, had already undergone a number of objectionable changes before conservation rules had come in. The design was stuck between two time periods.
“Its original roof and chimneys had been removed and replaced with a post-1943 hipped roof clad in terracotta tiles. The length of the house had been doubled with the addition of a substantial rear extension. A small skillion roof was put over the front veranda, metal balustrading and the front verandah detailing had also been amended, removing the original timber work,” Maharaj said.
“The previous work appeared to have focused on increasing the number of rooms, and not improving the spaces within,” he added. From the entry, a dark central hallway cut the house in half, splitting four bedrooms and a bathroom to the north from an additional bedroom, an enclosed lounge room, dining room and kitchen to the south.
Despite the patchwork of renovations and extensions over the years, planning regulations still remained strict for the team attempting to bring the residence into the 21st century.
“We had an initial concept, which was a little more modern than the end result, but the local council wanted a more traditional construction. We had a heritage expert come and look at the house and give their recommendations,” he said. “She determined that it was probably part of a group of three or four houses that were once the same beautifully detailed Federation-era homes. But somebody had come along in the 1940s and did their own thing.”
“There was a discussion about pulling off the roof and getting it back to what it was, but it came down to a question of budget. We tried to put back as much as we could, by replacing the front windows with traditional timber, we changed the front path and front fence just to give a little nod to what used to be, without stripping the render and reconstructing the whole roof.”
Now the street appeal of the home is a better fit with its Federation neighbours. The decision was then made to pull focus from the facade while investing attention, and funds, into the rear of the house.
“In keeping with what the Council was wanting, we used traditional materials and techniques in the construction of the back extension even though it does feel very modern,” Maharaj said.
As well as employing conventional methods for the external build of the large rear addition, a host of modern-day luxury finishes were used inside, where the interior design was overseen by owner Sarah Azzam.
High-traffic floors were finished with limestone tiles, Polytec joinery was used throughout, and internal walls feature a sleek white set render. Bathrooms feature Fibonacci Terrazzo tiles with underfloor heating.
A standout of the new look is the grand triangular gable crowning the rear indoor-to-outdoor living zone, a unique design feature in the neighbourhood of smaller sized blocks and heritage homes. The seamless flow to the backyard is an element that has become a must-have in modern Sydney homes thanks to the temperate climate.
“Our work began with the deconstructing and restructuring of the original home. Retaining four good-sized bedrooms to the front of the house, the central areas were dedicated to service spaces, with a big family bathroom, laundry, powder room and en-suite. The home then steps down to a large open-plan kitchen, dining and living room, which seamlessly connects to an al fresco dining area, garden, and a new pool and cabana,” Maharaj added.
“It’s such a Sydney thing, the seamless flow to the outdoors from the main living area. When I think about our briefs, from every single client, I’d say right at the top of everyone’s list is natural light, good ventilation and a connection to the garden,” he said. “Australians also love a north orientation.”
The Azzams, who declined to comment on the project, bought the unrenovated Haberfield house in 2020 for A$2.5 million (US$1.6 million), then sold the reimagined residence in 2023 for A$4.9 million.
“They bought it as their forever home. That large space at the back was created that way because they’ve got a big extended family,” Maharaj said. “They were often talking about Christmas dinners of 20 to 30 people, and space for a grand dining table was specifically on their list of requirements. Sarah has a great design eye and was meticulously hand selecting the finishes. But they ended up seeing another house nearby and decided to do it all again.”
Maharaj shared some more thoughts about the design and build process.
The biggest surprise was… I think we got lucky with the glass gable in the back of the house. We tried to do something similar on a house only a couple of streets away about a year later and it was completely knocked back by Council. When we pushed back to ask why, we were told it should never have been approved as is. Sometimes the approval process includes a bit of luck.
A favourite material we discovered during the process was… Of all the materials, I’d have to say that the Super White Dolomite and the limestone flooring we used were the big hits. We had quite a few potential buyers asking about these items in particular. We have received a number of calls from other homeowners in the area who are looking for a similar renovation, and even the odd call from people who have seen the home and wanted to express how much they loved it.
The most dramatic change was… When we start these jobs, we can often see that the houses have been either abandoned or people have just added and removed rooms and walls over time. So bringing that all back together was really fulfilling for me as an architect. Originally, this house felt like a cold hospital ward when you walked through it, with all these rooms coming off one corridor. Bringing it back to life and making it feel like a home with a heart is something we’re really proud of.
The total cost of the renovation… Being able to do the building himself, and their own interior design meant the pair could save some money, but they really spared no expense. It was a project that cost approximately A$1.5 million.
This stylish family home combines a classic palette and finishes with a flexible floorplan
Just 55 minutes from Sydney, make this your creative getaway located in the majestic Hawkesbury region.