Vote for Earth

The Association La Voute Nubienne is involved in a fascinating project with friends in France and Burkina Faso in the construction of vaulted earth roofed houses. The Nubian vault is an ancient architectural technique, traditionally used in Sudan and central Asia, but until now unknown in West Africa, which can accelerate appropriate house-building in the Sahel. The technique uses basic, readily available, ecologically sound, local materials (earth, water, rocks…) and simple, easily learned procedures. The major cost element is labour, so cash stays in the local economy. In Burkina Faso, Mali, and Togo, trained VN builders are becoming independent entrepreneurs. Lots of photos, and a video, of AVN houses and other buildings (a church, a mosque, guest-houses…) can be see on their website.

Last month, they put in a bid to Ashoka (a global foundation promoting social entrepreneurship) for their Changemakers competition on “How to Provide Affordable Housing.”, and we have just been informed that we are amongst the 13 finalists shortlisted by a panel of five distinguished judges. Of these 13 finalists, 3 are to be chosen for the competition prizes by online voting, which must be done by October 16th. I’m writing to ask you whether you might spare a bit of time to have a look at this shortlist, and to vote for them (and for two other of the short-listed projects).

If they win one of the three prizes, the money will be used to finance the training of more AVN apprentices during the coming winter building season in Burkina Faso. And I can assure you that this is a very worthwhile, sustainable project : Nazira and I stayed in a VN guest-house in Boromo, Burkina Faso, last January, and can vouch for the quality and comfort of the buildings.

Each voter is required to cast votes for three of the projects – otherwise your vote is rendered invalid. (Ashoka say this is a good way of ensuring fair play, and has worked well in past competitions). The deadline for voting is October 16, 2006. The Changemakers Innovation Award winners will be announced on October 17, 2006.

This is where to go to see the short-list and to vote online : http://www.changemakers.net/journal/300606/

10th International Conference on the Study and Conservation of Earthen Architecture

The 10th International Conference on the Study and Conservation of Earthen Architecture will be held in February 2008 in Bamako, Mali, West Africa. The conference is organized by the Getty Conservation Institute and the Ministry of Culture of Mali with the collaboration of Africa 2009, CRATerre-ENSAG , ICOMOS South Africa, and the World Heritage Centre, under the aegis of ICOMOS and its International Scientific Committee on the Earthen Architectural Heritage. Three hundred international specialists in the fields of earthen architecture, conservation, archaeology, scientific research and site management are expected to attend.

Rammed Earth in Spain Videos

Via google video, videographer Paul Jaquin has ammassed a collection of videos of rammed earth in spain. Read synopsis and watch the videos by clicking below:

Rammed earth at Lorca castle, a tour of the outside of the building, and a view across the valley.

Rammed earth wall at Palma del Rio in southern Spain. Constructed around 1171, and probably 6m high.

Conclusive proof that some rammed earth is absolutely fine in the rain. Here a castle at Alcala de Guadaira is observed in the middle of a rainstrorm with no detrimental effect to the fabric of the wall.

A video tour of Banos de la Encina castle, built in 967 from rammed earth.

Rammed earth wall at Novelda in southern Spain. This is a view inside a hole in the wall, proving that rammed earth can provide some arching or tensile action. Novelda castle was built around 1171 duringthe Almohad dynasty in Spain.

A tour of the inside of Villena castle in southern Spain. Constructed in rammed earth in 1172, it is a very well preserved rammed earth castle.

Rammed earth wall in Cordoba.

Vitruvius on Adobe

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In the only architectural treatise surviving from Classical Antiquity, Vitruvius: Ten Books on Architecture refers in some detail to adobe, describing suitable earth and suggesting that adobes should be made in the spring and left for at least two years to dry. He mentions that building by-laws in Utica (near Carhage) specify that only adobes of five years old be used for building, to be so certified by the aedile (magistrate).

Oldest Mud Brick Structure in the World

The ceremonial enclosure of Khasekhemwy–Hierakonpolis’ only standing monument is built entirely of sun-dried mud brick, with walls 5 meters (16.4 feet) thick and still preserved in places to its original imposing height of 9 meters (29.5 feet). It is the oldest freestanding mud-brick structure in the world. For the third time, it has been listed with the World Monument Fund as one of the world’s 100 most endangered monuments. Decorated on its exterior with a pattern of recessed paneling or niches and originally plastered white, it must have been a striking sight in its time. Almost 5,000 years later, it stands as a testament to the abilities of its builder, King Khasekhemwy, the last ruler of the Second Dynasty (ca. 2686 B.C.), but the reasons for which it was built remain a mystery.