3D Home Printing Landmark: 10 Houses in a Day

The global South is experiencing urban growth on a scale unprecedented in human history, far outstripping the great urbanization wave that swept across Europe and North America during the 19th and 20th centuries.

Faced with growth at this pace, governments – both national and local – often become overwhelmed by the rate of change and find it difficult to cope. One of the most common complaints urban-dwellers around the world have is about their living conditions. Even in developed countries, creating enough housing to match demand can be a struggle.

Quality housing is crucial to human development and quality of life. Adequate living space and access to running water make a significant contribution to people’s health and well-being. Despite this obvious conclusion, millions of urban dwellers live in squalid conditions with poor sanitation, overcrowding, crime, pollution, noise and a general feeling of insecurity. Insecure people find it difficult to access stable jobs and suffer stigma for living in poor-quality neighbourhoods.

But many initiatives are seeking to speed up the pace of home construction.

These include the Moladi construction system from South Africa (moladi.net). Moladi uses moulds to assemble houses, so that the building skills required are minimal and easily learned. Built to a template that has been tested for structural soundness and using a design that produces a high-quality home both in structure and appearance, the Moladi system seeks to provide an alternative to makeshift homes that are structurally unsound and vulnerable to fires, earthquakes and other natural disasters.

Another clever approach is a home and dwelling assembly system developed by architect Teddy Cruz (http://estudioteddycruz.com) (http://visarts.ucsd.edu/faculty/teddy-cruz) that allows slum dwellers to gradually construct a building in stages as they can afford it. It is earthquake-safe and fire resistant.

Another approach turns to the fast-growing technology of 3D printing (http://en.wikipedia.org/wiki/3D_printing). This technology has gone mainstream in the past five years in the form of desktop-sized 3D printers, or fabricators as they are sometimes called. The machines assemble objects in an additive fashion – layer-by-layer – using digital designs from a computer.

3D printers can make a complex object without having to resort to mass manufacturing. An accurate, one-off object can be created with the same precision as a machined object. Architects, for example, use the technology to make 3D models of their designs. And now a company in China is hoping to use 3D printers to make houses.

The WinSun Decoration Design Engineering Co. (http://www.yhbm.com/index.aspx) 3D printed 10 houses in 24 hours in Shanghai’s Qinpu district, reported Business Insider.

This landmark achievement was accomplished with a giant printer – 152 meters long, 10 meters wide, and 6 meters high – which manufactured walls for the house from a mix of construction waste and cement.

As a sign of the confidence the company has in the innovative construction technique, it built its own 10,000 square meter headquarters in one month using the same materials. The company’s chief executive officer, Ma Yihe, is also the inventor of the technique. It is a very flexible technology and the material can be tinted different colors according to the customer’s wishes. It is cheap to work with and is also less draining on environmental resources than traditional building materials.

The 10 houses consist of two concrete side supporting walls with glass panels at the front and back and with a triangle roof. They will be used as offices at a high-tech industrial park in Shanghai. The company has big plans, hoping to use the technology to build more homes – and even skyscrapers.

Competition is heating up as people around the world seek to perfect 3D technology to print houses to meet the growing demand for dwellings.

In The Netherlands, Dutch architectural firm Dus Architects (dusarchitects.com)  commissioned the development of a leviathan 3D printer so it could print entire rooms. Modeled on a much smaller home desktop version, the Ultimaker (ultimaker.com), this printer creates whole rooms that are then assembled into custom-built houses.

The 6-meter high KamerMaker (kamermaker.com), or “room builder”, is being used in Amsterdam to build a full-size house.

The project is called “3D Print Canal House” (http://3dprintcanalhouse.com/). The printer assembles the rooms individually, and then they are snapped together to make a house. The internal structure of the building blocks are in a honey-comb pattern, which is then filled with a foam that becomes as hard as concrete.

“For the first time in history, over half of the world’s population is living in cities,” Dus Architects founder Hans Vermeulen told cnet.com. “We need a rapid building technique to keep up the pace with the growth of the megacities. And we think 3D printing can be that technique.

“We bought a container from the Internet and we transformed it into one of the biggest printers on this planet.”

This technology can also easily use recycled waste materials and lower the pollution and cost of moving building materials around. The Dus Architects prototype house is expected to take three years to complete (so, still in its early development phase) and will look like a typical Dutch canal house with a pointy, gabled roof (http://www.build.com.au/gabled-roof).

One of the pioneering advocates for using 3D technology to address the global South’s urbanization and housing challenge has been Larry Sass, director of the Digital Design Fabrication Group (http://ddf.mit.edu/) at the Massachusetts Institute of Technology (MIT).

Three technologies have been developed at MIT since the 1950s that have made digital fabrication possible – computer numerical control (CNC), which enables computers to control machines; computer-aided design software in the 1960s; and 3D printing in the 1980s to make solid models using digital designs.

Sass told MIT’s Spectrum newsletter (spectrum.mit.edu) that large-scale 3D printing would mean “buildings will rise faster, use fewer resources, cost less, and be more delightful to the eye than ever before.”

He envisions a future in which architects will be able to send their designs by computer to a 3D printer and it will then be able to start “printing” the building or a house accurately according to the original designs.

The conventional way of making buildings has been stuck in the same approach since the 1800s, according to Sass. It uses highly skilled and extensive labour, it is slow and plagued by weather disruptions and urban congestion, and it is expensive, often using materials brought from far away.

Digitally fabricating buildings takes a radically different approach: the building is made in a series of precision-cut, interlocking parts and then assembled on site like a jigsaw puzzle.

“It’s the right delivery system for the developing world, because the developing world doesn’t have an infrastructure of tools, air guns, saws and power,” Sass said.

“Design and high-quality construction is mostly for the rich,” added Sass, who was raised in Harlem, a New York City neighbourhood with high poverty levels. “I’ve always wanted to figure out how to bring design choice and architectural delight to the poor.”

By David South, Development Challenges, South-South Solutions

Published: July 2014

Development Challenges, South-South Solutions was launched as an e-newsletter in 2006 by UNDP's South-South Cooperation Unit (now the United Nations Office for South-South Cooperation) based in New York, USA. It led on profiling the rise of the global South as an economic powerhouse and was one of the first regular publications to champion the global South's innovators, entrepreneurs, and pioneers. It tracked the key trends that are now so profoundly reshaping how development is seen and done. This includes the rapid take-up of mobile phones and information technology in the global South (as profiled in the first issue of magazine Southern Innovator), the move to becoming a majority urban world, a growing global innovator culture, and the plethora of solutions being developed in the global South to tackle its problems and improve living conditions and boost human development. The success of the e-newsletter led to the launch of the magazine Southern Innovator.  

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Housing Innovation in South’s Urban Areas

 

As urban populations around the South increase, the quality of city housing will be critical to the quality of life and sustainability of improvements to living standards.

Living in crowded and chaotic urban and semi-urban areas does not have to mean suffering poor quality housing. A variety of Southern architects are showing how new perspectives on common problems like cramped spaces, traffic noise, minimal green spaces and tight budgets can be addressed with clever thinking and new concepts.

The bustling and crowded Brazilian city of Sao Paulo has evolved in a chaotic fashion over the years. As Brazilian photographer Reinaldo Coser admitted to design and architecture magazine Dwell (www.dwell.com) , in many places it is “very ugly.”

Sao Paulo suffers from the downside of rapid urban and semi-urban development familiar to cities across the South: traffic gridlock, pollution, noise. It’s a toxic combination of factors that turns even simple tasks like buying groceries into depressingly long, stressful ordeals.

Coser’s family home sits a couple hundred metres from the congested Avenida Brigadeiro Faria Lima (http://en.wikipedia.org/wiki/Avenida_Brigadeiro_Faria_Lima) , the city’s unofficial main street. Yet the dwelling has been cleverly designed to make living in the centre of this modern urban hurly burly a peaceful and calming oasis. Designed by Brazilian architects Studio MK27 (http://www.marciokogan.com.br) – and in keeping with the rich Brazilian modernist tradition pioneered by Oscar Niemeyer in the country’s capital, Brasilia (http://en.wikipedia.org/wiki/Bras%C3%ADlia) – the home uses clever techniques to build calm into chaos.

The front and back gardens are level with the living room, creating an enormous living space that seamlessly flows from indoor to outdoor space. By using a large overhang over the gardens, even on rainy days the home can be lived in almost without walls.

Furniture in the home draws on Brazilian designers like Sergio Rodrigues (http://www.sergiorodrigues.com.br).

One of several innovative Brazilian firms, Studio MK27 was founded in the 1980s by Marcio Kogan. It has 12 architects from around the world collaborating on projects.

With a metropolitan population of around 20 million, Sao Paulo (http://en.wikipedia.org/wiki/S%C3%A3o_Paulo) is the most populous city in the Americas, and in the Southern hemisphere.

While it is easy to point out the downsides of rapid and chaotic urban development, Coser, a professional photographer, lives and loves Sao Paulo nonetheless because, like so many cities across the South, it is a vibrant and dynamic place to be.

And by choosing a design for his home that is calming, he has been able to introduce balance into his family’s life while benefiting from the economic opportunities of the city.

“This house has actually changed the rhythm of our lives,” he told Dwell. “We eat at home more. We go to bed earlier. We wake up earlier. We sleep more.”

And how has the calm helped his two daughters? One is able to play without disturbing the neighbours, and the other can quietly study her books, which was difficult when the family lived in the noise and buzz of a small two-bedroom apartment.

And – something often overlooked in development plans cooked up by economists and urban planners – the aesthetics of the house are very appealing. “Our house is so pretty,” says his wife, Sophia. “Sometimes I like to just look at it for a long time.”

This calm home was created out of basic need. The family needed more space with a second daughter on the way, and had become frustrated with the congestion of the city and the lack of green space. Architect Marcio Kogan was consulted for a solution.

“We wanted a place where we could just shut the door and travel,” says Reinaldo.

The house is made from raw concrete and a cheap-but-tough local wood called cumaru (http://tinyurl.com/3y8kh8v) . By using inexpensive and low maintenance materials, the home is able to weather the environmental stresses of a polluted, tropical city with harsh sunshine.

Kogan deployed his previous experience as a filmmaker to make the home feel and look more spacious and open than it is. He calls it “looking at the world through a wide-screen lens.” The design of the home is seen as a “narrative”, leading the occupant from the garden to the living room, up the stairs, past bedrooms to a rooftop deck with panoramic views of the city.

Another innovative solution in Sao Paulo is USINA (http://www.usinactah.org.br) – a finalist for the World Habitat Awards (http://www.worldhabitatawards.org/about/?lang=00) – which brings people together to build high-density urban housing. It has aided more than 5,000 people to build with their own labour multi-storey buildings. These new apartments are not isolated from other services, but come with community facilities, childcare facilities, professional training courses and other employment-generating activities.

It is estimated up to 15 percent of the city’s population live in slums. This community organising approach is in contrast to the existing ad-hoc building of homes in the slums – often with no technical assistance – or public housing projects built by developers looking for quick profits while ignoring quality and services. USINA’s approach has led to Sao Paulo being a pioneer in participatory housing policies.

USINA provides the technical assistance to social movements looking to build housing for the poor. The cost for the buildings is borne by a combination of public funding and the labour of the residents (working 16 hours per week per household). The cost per housing unit tends to be between US $12,000 and US $15,000 (with land usually donated free by public authorities).

Architectural innovation is also underway in Indonesia, another country that has experienced spurts of rapid economic growth and urbanization, and where a growing middle class is demanding a higher quality of life.

The country’s capital, Jakarta (http://en.wikipedia.org/wiki/Jakarta) , with a population over 8 million, is a mixed bag of modern skyscrapers, crumbling colonial architecture, suburbs and slums.

In the Jakarta suburb of Bekasi (population more than 2 million), Nugrohu Wisnu was looking for a little more space for his family.

At first, the family encountered the downside of poorly designed housing. They bought a house which was infested with termites and was uncomfortable to live in. Frustrated, they began shopping around for something better. And they turned to Indonesian architects Djuhara + Djuhara (http://djuhara.com/home.html).

“We thought that an all-steel house like the one that Mr. Djuhara had built just down the road would be termite resistant,” Wisnu told Dwell.

Djuhara is a high-profile architect and chair of the Jakarta chapter of the Indonesian Institute of Architects (http://www.iai.or.id) and helped to modernize the city’s planning regulations.

The stereotype of young Indonesian architects is that they only work on luxury hotels. But Djuhara was designing and building suburban homes and this grabbed Wisnu’s attention.

Also against stereotype, Djuhara was actually attracted by a tight budget and the small space for the house. In a crowded city, using every bit of space efficiently is critical. The existing house was torn down and Djuhara set about building a new home. The majority of the building materials were sourced within the immediate area: an easy thing to do in Jakarta since there are many vendors selling building supplies on the streets.

By buying local like this, shipping costs were eliminated from the cost of the house. The home’s cost, US $20,000, is just 2/3 of what a more conventional Indonesian home would cost.

Djuhara revelled in the job: “Ad-hocism is my religion,” he told Dwell.

The split-level design of the home uses the space well. The kitchen opens up into the garden.

“Family breakfasts are great in here,” says Wisnu. “And the open kitchen encourages the kids to head out into the garden and run and play.”

There is also a strong environmental component to the design. Airflow cavities in the ceiling are used in the bedrooms to cool them. The house also uses heavy wooden shutters to keep the house cool during the day: “The shutters are unusual, but they are thick and sturdy,” Wisnu explains.

“They really shade the master bedroom to the extent that it feels mellow and cool. They let us reduce our air-conditioning consumption, even during the height of the day.”

And Djuhara also has another difference from many other architects: he refuses to patent his design.

“My friends have asked me why I don’t patent my low-cost houses,” he explains, “but they completely miss the point. I actually want my designs to be copied. I want Indonesian society to rethink its attitudes towards urban architecture.”

By David South, Development Challenges, South-South Solutions

Published: June 2010

Development Challenges, South-South Solutions was launched as an e-newsletter in 2006 by UNDP's South-South Cooperation Unit (now the United Nations Office for South-South Cooperation) based in New York, USA. It led on profiling the rise of the global South as an economic powerhouse and was one of the first regular publications to champion the global South's innovators, entrepreneurs, and pioneers. It tracked the key trends that are now so profoundly reshaping how development is seen and done. This includes the rapid take-up of mobile phones and information technology in the global South (as profiled in the first issue of magazine Southern Innovator), the move to becoming a majority urban world, a growing global innovator culture, and the plethora of solutions being developed in the global South to tackle its problems and improve living conditions and boost human development. The success of the e-newsletter led to the launch of the magazine Southern Innovator.  

Follow @SouthSouth1

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Tiny Homes to Meet Global Housing Crisis

 

More than 1 billion people around the world lack decent shelter. Of these, the majority live in urban areas, usually in slums and informal settlements (UN-HABITAT).

The world’s megacities – like Mumbai, India, where more than 22 million live in the metropolitan region – have to find a way to provide housing that is both affordable and does the minimum possible amount of harm to the environment.

About one-third of the world’s urban dwellers live in slums, and the United Nations estimates that the number of people living in such conditions will double by 2030 as a result of rapid urbanization in developing countries.

The fast pace of growth of India’s cities presents an enormous challenge: how to house so many people with dignity and to a good standard. India’s city slums are notorious and recently became the subject of the Oscar-winning film Slumdog Millionaire (http://www.slumdogmillionairemovie.co.uk/).

With a population of 1.2 billion, India needs to find 25 million homes a year to meet current demand, according to McKinsey and Co.

Housing prices have risen by 16 percent a year for the past four years. While the middle class – estimated at over 300 million people – has piled into high-end apartments and houses, it has been the country’s low-income people who have been frozen out of the option of quality homes.

The concept of targeting those at the ‘bottom of the pyramid’ (BOP) (http://en.wikipedia.org/wiki/The_Fortune_at_the_Bottom_of_the_Pyramid) has drawn attention to the estimated 23 million poor urban dwellers in India, and 180 million rural families, who have savings and want to own a home. Monitor India (http://www.monitor.com/in/) believes these people have annual earnings between US $1,400 and US $3,000.

The Indian manufacturing powerhouse Tata – which this year launched a BOP-focused car, the Tata Nano – has designed and is building, Nano Homes – small apartments outside Mumbai for US $8,600 (http://tatahousing.in/pages/home.php). It also hopes to expand to other major Indian cities as well.

The Nano homes are built on a modest scale: there are three sizes with the smallest measuring 67 square metres. They consist of a single room that doubles as a bedroom by night with a sink, bath and toilet behind a partition.

Criticisms include location – on the edges of major cities – where residents would have to commute long distances to get to their jobs.

Even so, Nano apartments are so popular buyers are being chosen by lottery.

“India’s housing crisis lies in the fact that the poor in the cities are priced out of the market,” Sundar Burra, an adviser to the Society for the Promotion of Area Resource Centre, a Mumbai-based housing rights organization, told Canada’s Globe and Mail newspaper.

“State supply of housing for the poor is woefully inadequate in relation to the need. Slums proliferate as a solution to this state of affairs.”

People can get a mortgage for the homes from Tata Home Finance.

Tata is not the only company targeting this market. India’s Matheran Realty (http://www.tmcity.in/) is building what it claim is India’s largest affordable housing project, Tanaji Malusare City, in the villages of Shirse and Akurle of Karjat (http://en.wikipedia.org/wiki/Karjat). The 15,000 homes would house 70,000 people and would sell for US $4,698.

Another developer, Godrej Properties (http://www.godrejproperties.com/), is building a BOP housing development outside the city of Ahmedabad with apartments costing US $11,749.

“(Property) developers have recognized that the real demand no longer lies in the premium segment and are opting to build smaller, no-frills apartments,” said Deepak Parekh of the Housing Development Finance Corporation (http://www.hdfcindia.com/).

It estimates the affordable housing market will be worth US$ 110 billion in India by 2013 and will account for 80 percent of India’s housing market.

“Affordable housing is not about box-sized, budget homes in far-flung places where there is no connectivity to workplaces and little surrounding infrastructure,” Parekh told HDFC’s shareholders. “Affordable housing has to be able to cut across all income segments and has to make economic sense in terms of proximity to the workplace.”

By David South, Development Challenges, South-South Solutions

Published: November 2009

Development Challenges, South-South Solutions was launched as an e-newsletter in 2006 by UNDP's South-South Cooperation Unit (now the United Nations Office for South-South Cooperation) based in New York, USA. It led on profiling the rise of the global South as an economic powerhouse and was one of the first regular publications to champion the global South's innovators, entrepreneurs, and pioneers. It tracked the key trends that are now so profoundly reshaping how development is seen and done. This includes the rapid take-up of mobile phones and information technology in the global South (as profiled in the first issue of magazine Southern Innovator), the move to becoming a majority urban world, a growing global innovator culture, and the plethora of solutions being developed in the global South to tackle its problems and improve living conditions and boost human development. The success of the e-newsletter led to the launch of the magazine Southern Innovator.  

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Debt-free Homes For the Poor

As the population around the world’s cities grows, and slums grow larger and more prevalent, the urgent need for affordable and decent housing becomes more pressing. The world’s megacities – like Buenos Aires, Argentina, where more than 13 million live in the metropolitan region – have to find a way to provide housing that is both cheap and does the minimum possible amount of harm to the environment.

About one-third of the world’s urban dwellers live in slums, and the United Nations estimates that the number of people living in such conditions will double by 2030 as a result of rapid urbanization in developing countries. Latin America is already the most urbanized region in the developing world.

“Throughout Latin America you have economies that are growing and doing well, but the way the economies are growing is actually generating more shanty towns,” said Erik Vittrup, senior adviser on Latin America and the Caribbean for the U.N. Human Settlements Program. “It’s a growth that is just generating wealth for those who (already) have it.”

How well people dwell is integral to their mental and physical health. Most squatters and slum dwellers live in makeshift homes made from whatever they can get their hands on. These dwellings are usually unsafe and vulnerable to fire, floods, and earthquakes.

But across the South, initiatives are proving it is possible to build good quality homes for the poor while avoiding burdening them with debt. Pioneering ways are being developed for the poor to build their own high-quality houses using recycled materials and environmentally friendly products.

In Colombia , Alejandro Salazar, a chemical engineer, professor at the Universidad del Valle (http://www.univalle.edu.co/english/) and innovator running several companies pioneering new building technologies using recycled waste, is building high-quality, inexpensive houses for the poor.  By combining free building materials recovered from waste, a government grant and the voluntary labour of the homeowners, Salazar’s company is able to build homes for the poor that don’t leave them with ongoing bank debt from mortgages.

Based in Cali, Colombia (http://gosouthamerica.about.com/od/cali/p/Cali.htm), his companies Ecoingenieria (product and material research and development), Ecomat SA (production of eco-materials using industrial waste and construction rubble), Constructora Paez, (social housing construction using eco-products) and Wassh SA (environmental management and transformation of dangerous solid waste into non-dangerous materials), are focused on pioneering new technologies for housing.

“Our company uses two basic technologies,” said Salazar. “The production of eco-materials from solid waste and demolition waste, and the implementation of an agile building system, which does not require skilled labour and is hand-transportable. All the pieces are produced in a prefabrication plant that uses the eco-materials.”

Salazar has found a way to provide homes quicker than existing NGOs – Popular Housing Organizations (OPV), as they are called – established to address homelessness in Colombia. The homeless poor are caught in a Catch-22: they need to have a formal job to receive homebuilding assistance from the government, and they usually can not save up enough money for a down payment on the home.

Salazar’s solution is to take the maximum grant given by the central government, which is US $4,730, and combine it with the recycled building materials and homeowners’ own labour. He says this allows a house to be built for roughly half the price of a similarly sized one that uses conventional materials: the eco-materials house costs around US $ 6,590, compared to US $12,000 using conventional materials. Land is often either donated by the municipality or the family already owns it. And in Salazar’s experience, the whole family chips in with the building: husbands, sons, brothers, fathers, wives.

The training takes just three days on eco-materials and a day in construction techniques for house building.

“To date, we have built with this method 306 houses,” said Salazar. “For the coming year, we expect to deliver around 500 houses or more. To build a house, after acquiring the land, we need three people working eight hours a day to build it in four weeks – all under the supervision of a workforce teacher and the supervision of an engineer or architect.

“The houses are designed by architects with the participation of the community or families. They do some workshops and the design conforms to their vision and expectation. In Colombia, there is an earthquake resistance code which is binding in law and provides detailed specifications of the materials, foundations, structure and roof.”

The pre-fabricated building materials are made from recovered waste from a wide variety of sources: ceramic red brick, coarse ash and fly ash, slag from steel, copper slag, porcelain insulators used for electrical power lines, nickel slag, sludge from sugar and alcohol plants and water treatment plants.

“The raw materials we use are industrial solid waste and demolition waste. It costs the industry a lot to throw away this waste,” Salazar said.

He said the biggest obstacle to the new homes is psychological: many people initially “tend to reject at first-hand the technology.”

“When visiting the factory and then visiting the homes – or model homes – they then compare it with a traditional house, and realize that the best eco-homes when finished meet the standards of Colombian earthquake resistance and are also cheaper,” he said.

Compared to using conventional building materials, the eco-materials reduce the cost of a new home. And the company still makes a profit from it!

In Paraguay, Elsa Zaldivar is using recycled plastic, cotton netting, corn husks, and loofah sponges (http://en.wikipedia.org/wiki/Luffa) to make cheap, lightweight construction panels for housing. This has a double benefit: it makes for cheap housing and it is good for the environment.

“That’s very important in Paraguay,” said Zaldivar, “because we’ve already reduced our original forest to less than 10 percent of the national territory.”

Zaldivar got her experience working with people in the impoverished area of Caaguazú, where in the past she helped with the building of toilets and making stoves. She found that involving local people in this work made a huge difference: “They told me: ‘Now we feel like we’re people with dignity.’”

She encourages local women to grow loofah – a plant that once flourished but was being ignored. While the fruit is edible she was more interested in the crusty sponge that is left over when the plant is dried. The women started a cooperative selling loofah sponges, mats and slippers. But there was a lot of waste in the process, with a third not suitable for export. She then came up with the idea to use the loofahs for wall and roof panels for cheap housing.

Along with industrial engineer Pedro Padros, she developed a way to combine loofah with plastic waste. Padros invented a machine to melt the recycled plastic and mix the molten plastic with loofah, vegetable fibres and chopped corn husks. It has produced a building panel that is lighter and easier to move around than lumber or brick. With a grant from the Inter-American Development Bank, design improvements have been made and the cost-per-panel brought down from US $6 per square meter. It is now competitive with the cost of wood panels. The great thing about the panels is that they can be recycled again when they wear out, completing the cycle.

“To have a decent home liberates people,” said Zaldivar.

By David South, Development Challenges, South-South Solutions

Published: January 2009

Development Challenges, South-South Solutions was launched as an e-newsletter in 2006 by UNDP's South-South Cooperation Unit (now the United Nations Office for South-South Cooperation) based in New York, USA. It led on profiling the rise of the global South as an economic powerhouse and was one of the first regular publications to champion the global South's innovators, entrepreneurs, and pioneers. It tracked the key trends that are now so profoundly reshaping how development is seen and done. This includes the rapid take-up of mobile phones and information technology in the global South (as profiled in the first issue of magazine Southern Innovator), the move to becoming a majority urban world, a growing global innovator culture, and the plethora of solutions being developed in the global South to tackle its problems and improve living conditions and boost human development. The success of the e-newsletter led to the launch of the magazine Southern Innovator.  

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Google Books: https://books.google.co.uk/books?id=bbCXBgAAQBAJ&dq=development+challenges+january+2009&source=gbs_navlinks_s

Slideshare: http://www.slideshare.net/DavidSouth1/development-challenges-january-2009-issue

Southern Innovator Issue 1: https://books.google.co.uk/books?id=Q1O54YSE2BgC&dq=southern+innovator&source=gbs_navlinks_s

Southern Innovator Issue 2: https://books.google.co.uk/books?id=Ty0N969dcssC&dq=southern+innovator&source=gbs_navlinks_s

Southern Innovator Issue 3: https://books.google.co.uk/books?id=AQNt4YmhZagC&dq=southern+innovator&source=gbs_navlinks_s

Southern Innovator Issue 4: https://books.google.co.uk/books?id=9T_n2tA7l4EC&dq=southern+innovator&source=gbs_navlinks_s

Southern Innovator Issue 5: https://books.google.co.uk/books?id=6ILdAgAAQBAJ&dq=southern+innovator&source=gbs_navlinks_s

This work is licensed under a
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Making Bamboo Houses Easier to Build

More than 1 billion people around the world lack decent shelter. Of these, the majority live in urban areas, usually in slums and informal settlements (UN-HABITAT). Latin America has a serious shortage of adequate housing: in Colombia, 43 percent of the population needs decent housing; in Brazil, 45 percent; Peru, 53 percent.

The challenge is to provide good quality homes without significantly harming the environment – and with constrained budgets. Bamboo – cheap, strong, quickly renewable and beautiful to look at (http://en.wikipedia.org/wiki/Bamboo) – is an ideal solution to replace traditional wood lumber. In Bolivia, pioneering work is underway to improve the quality of homes and buildings made with bamboo.

Bamboo is the fastest growing woody plant in the world, sometimes growing over 1 metre a day. Bolivia (http://en.wikipedia.org/wiki/Bolivia) has about 17 identified bamboo species, of which five have a significant economic value. Around the world, there are 1,000 species of bamboo. They grow in a wide variety of climates, from cold mountains to hot tropical regions.

Once called the “poor man’s timber” – a temporary building material to replace once there is more money – bamboo is now getting the respect it deserves. Bamboo for housing has a long history in Latin America, stretching back 4,500 years to ancient civilizations. In Asia, it has long been a traditional construction material. But most of the existing bamboo dwellings in Latin America are 50 to 100 years old.

The most popular species of bamboo used in South America is Guadua, which is known for being large, straight and attractive.

“In Bolivia, there is no other building material more competitive in costs,” said Jose Luis Reque Campero, coordinator of the Bolbambu Programme of the Architectural Research Institute, Universidad Mayor de San Simon, Bolivia (http://www.umss.edu.bo/).

“Bamboo is the material that requires less energy, followed by wood and concrete, with steel in last place, needing energy necessary for its production 50 times greater than that required by bamboo.”

Campero also says bamboo is much less expensive than traditional building materials.

“But the biggest advantage is certainly the possibility of planting bamboo, and then reaping houses,” he said.

Campero has focused his efforts on a key component of bamboo housing: the joints that bind the bamboo poles together. Driven by the desire to find ways to improve the ease of building bamboo homes and their strength, Campero came up with the Bamboo Bolivia Space Structures, Structural System: EVO (BBSS-EVO) (named after Bolivia’s president, Evo Morales – http://en.wikipedia.org/wiki/Evo_Morales).

Traditional joints took a long time to make and required power tools and complex instruction manuals. Simplifying the building techniques necessary for bamboo construction was important because, while bamboo was cheap, the labour costs were high.

The joint looks like a giant two-headed Q-Tip. Each end is made of four pieces of bamboo, connected by a long screw with bolts on each end taken from old cars. The joint is inserted inside the bamboo poles and snaps shut, joining poles tightly together and, as each piece is assembled, looking like a child’s building toy as the structure of the bamboo home takes shape.

The new joint was easier to assemble and was quickly adopted by local builders. It also allows for a vast range of structures and shapes to be built, limited only by imagination and physics.

Devising joints made from bamboo has the advantage of avoiding the weight and cost of bringing in concrete, especially to remote areas.

“The manufacturing process is fully in the workshop and indoors,” said Campero, “which in addition to allowing a degree of quality control in production, improves working conditions for staff and protects the material.”

The whole building process adheres to “the principles of the famous phrase: ‘do-it-yourself’.”

The Evo joint allows for flexibility and easy assembly and disassembly, enabling the builder to move around parts of the structure and not be wedded to the original structural plan. This has the advantage of customizing the building to its physical location.

Working in the tropical forests of Cochabamba (http://en.wikipedia.org/wiki/Cochabamba), Campero has been testing his designs with the local people, who were looking to improve the tourist infrastructure in the resort town of Cristal Mayu.

Costa Rica in Central America – ironically a country without indigenous bamboo plants – has used its National Bamboo Project of Costa Rica (http://www.unesco.org/most/centram1.htm) to prove it is possible to both cultivate bamboo and use it to provide housing for the poor, confirming the wisdom of millions of people: bamboo is economical, convenient, safe and looks great.

Campero has received a great deal of interest in his innovations and is looking for funding partners in 2009 to take his work further.

He has this advice for other builders and designers: “Stick to developing local technologies, use what you have and innovate, use native materials and the local environment for the development of elements, components and construction systems. Don’t rely on advanced technology tools for manufacture, and stay in harmony with the human need for creativity.”

By David South, Development Challenges, South-South Solutions

Published: December 2008

Development Challenges, South-South Solutions was launched as an e-newsletter in 2006 by UNDP's South-South Cooperation Unit (now the United Nations Office for South-South Cooperation) based in New York, USA. It led on profiling the rise of the global South as an economic powerhouse and was one of the first regular publications to champion the global South's innovators, entrepreneurs, and pioneers. It tracked the key trends that are now so profoundly reshaping how development is seen and done. This includes the rapid take-up of mobile phones and information technology in the global South (as profiled in the first issue of magazine Southern Innovator), the move to becoming a majority urban world, a growing global innovator culture, and the plethora of solutions being developed in the global South to tackle its problems and improve living conditions and boost human development. The success of the e-newsletter led to the launch of the magazine Southern Innovator.  

Follow @SouthSouth1

Google Books: https://books.google.co.uk/books?id=YtEgTdyZioUC&dq=development+challenges+december+2008&source=gbs_navlinks_s

Slideshare: http://www.slideshare.net/DavidSouth1/development-challengessouthsouthsolutionsdecember2008issue

Southern Innovator Issue 1: https://books.google.co.uk/books?id=Q1O54YSE2BgC&dq=southern+innovator&source=gbs_navlinks_s

Southern Innovator Issue 2: https://books.google.co.uk/books?id=Ty0N969dcssC&dq=southern+innovator&source=gbs_navlinks_s

Southern Innovator Issue 3: https://books.google.co.uk/books?id=AQNt4YmhZagC&dq=southern+innovator&source=gbs_navlinks_s

Southern Innovator Issue 4: https://books.google.co.uk/books?id=9T_n2tA7l4EC&dq=southern+innovator&source=gbs_navlinks_s

Southern Innovator Issue 5: https://books.google.co.uk/books?id=6ILdAgAAQBAJ&dq=southern+innovator&source=gbs_navlinks_s

This work is licensed under a
Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License.