Since 2000, the ambition of the Nubian Vault Association (AVN) has been to develop a market for adapted housing in West Africa by bringing together issues of housing, professional training, economics, environment and climate change. At the heart of the programme is the Nubian vault, an architectural concept that is both ancestral and innovatory. This construction technique requires neither timber nor metal roofing sheets, but uses mud bricks and mortar as the raw material. Local labour is trained in the technique, providing much needed employment and a professional skill base of Nubian Vault (NV) masons.