I was recently contacted by Antoine Horellou and made aware of Association la Voûte Nubienne (AVN). The following is an introduction to the technique and the organization based on information provided on AVN’s website (which is also available in French). Thanks, Antoine, for letting us know.
The Nubian Vault is “an affordable, sustainable, African building technique.” It uses mud bricks and earth mortar, assembling them into arched, vaulted ceilings without the need for timber. Water- and weatherproofing is incorporated into design with plastic sheeting and an additional layer of enriched mud mortar covering the roof and optional additional concrete, lime or tar finishes, depending on need based on local conditions.