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http://www.lavoutenubienne.org
Ten years ago in Burkina Faso, a landlocked African county, a small change started in the way people built their homes. Today that provides employment to many and is a growing way of life. It involves the construction of a simple vaulted earth roof, which was the traditional way of building for centuries, till it was replaced by other, less viable materials like tin roofs. 

The Earth Roofs for the Sahel, is a programme that is part of the Association la Voute Nubienne, (AVN) an NGO registered in France and Burkina Faso, in 2000. It promotes the construction of timberless valuted earth brick houses, using a well known technique known as la Voute Nubienne (VN). The VN technique is actually an adaptation of an age old technique of building houses from the Nubian region of Egypt. The country has two seasons, a rainy one for around 4 months, and the rest of the year is the hot season with winds from the Sahara. Traditional building used earth walls, thatched roofs and some timber, but with population growth the use of timber for construction is illegal or too expensive. People often resort to sheet metal or timber beams. These materials drain family resources, sheet metal gets corroded, and they are often imported from outside at high expense. Sheet metal also has poor heat and sound insulation. 

The first prototype of a VN construction in Boromo, Burkina Faso, was built as a challenge by Thomas Granier and Séri Youlou in 1998. Next year, a VN house was built, and the Association la Voute Nubienne was founded in 2000 to promote the VN technique as a solution for affordable, sustainable housing in the Sahel.

The vault roof is built without a timber support. The roof is waterproofed using locally produced plastic sheeting over a smooth coating of mud. This way of building is not only ecologically and economically sound, but also socially viable, and all these three parameters are essential in a country that occupies the sixth to last place on the Human Development Index. Local masons are trained, and they in turn employ apprentices once they become master masons. After some experience, master masons become independent entrepreneurs. The AVN helps them through the process, and helps the entrepreneurs develop a client pool through communication and networking. Till today approximately 235 houses and 20 public buildings (including schools, dispensaries, churches and mosques) have been built. Over 115 masons have been trained and there are currently 170 apprentices.

Houses using the VN technique are more comfortable, healthy and durable. They are also safer, less prone to collapse and better in extremes of climate. They can be easily built with local materials and labour, most houses are built by bartering crops and/or labour. The families cover the housing and material cost, with AVN only covering a margin of labour and training costs. Now AVN has to cover less and less, which is a healthy sign of an active, self-sustaining system. The project is generating income and employment for many, and there have been over 7000 beneficiaries till date. The number of apprentices is increasing, which means more masons to carry out further training in the future. The vaulted roof can be converted to a flat terrace roof and the technique allows for later extension of a building, even adding a second storey onto an existing single storey building.

The simplicity of this technique, (you can read more about it here) and its involvement of the local community are key to its success. It does not require fancy equipment, skill, or technical know-how. While giving people a better way to live, it also provides a means of livelihood, essential in such places. It has led to a major reduction in the use of imported materials, as it uses local materials, earth and water, and deforestation has also reduced. The poorest of families in remote rural areas are also building with this technique. Money saved by building this way is used for health or education. 

This technique thrives because it stays as close to the people it was meant for, as possible. It is an innovation not only in design, but also in system. It traditionally comes from their own culture, it draws on local materials and skill, and creates independent entrepreneurs, reducing dependence on the mother NGO, and outside resources. 

Do have a look at the video below.

By Armeen Kapadia

 


Comments

Dwarka Nath Sinha

Tue, 23 Feb 2010 10:23:00

This seems a really great intervention and development through design and i hope we have more and more such examples all around. Thanks for the article. :)

 

armeen kapadia

Tue, 23 Feb 2010 20:49:59

Welcome Dwarka! Hope we see more such development in India, instead of all the ugly stuff :)

 



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