Results & Impacts

A Summary of the overall results & impacts to date (Sept 2014)

The main results so far:

  • Since the start of the program, 2,420 vaults * have been built by NV masons and entrepreneurs, for 120 clients, in 570 locations (villages, hamlets, towns) in 5 countries of the Sahel (Burkina Faso, Mali, Senegal, Benin, and Ghana)
  • If all the vaults built were placed end-to-end, this would reach a total length of 18 km
  • 80% of NV buildings are houses, and 20% are for community use (churches, mosques, community centers, schools...)
  • 328 NV masons have been trained, of whom half are at the foreman and/or entrepreneur level
  • There are currently over 400 apprentices in training
  • Since 2000 the program has experienced an average annual growth rate of 32%.

* NB: a standard vault , our unit of measurement, has internal dimensions of 7M long X 3,25 M wide - most village houses comprise one or two vaults)

And we estimate the impacts of the Program as being:

  • 17,000 people use, live in, or sleep in NV buildings;
  • 28,000 corrugated iron roofing sheets have been economized
  • 3,300 trees, have been saved, and 4,800 tons of CO2-equivalent economized,  as a result of NV construction, as compared to the alternatives
  • 1,750,000 Euros of local economic impacts have been generated.

One of the most encouraging outcomes is that over one-third of the NV construction market is now completely autonomous and self-sustaining: 23% of NV clients are found directly by NV builders / entrepreneurs. Of the remainder, 34% come via a local intermediary or ’champion’, and 43% via AVN itself. So, in the regions where AVN is active, we are well on the way to a growing and independent market in NV construction, permitting us to soon move on and target our resources in new regions.

Map of deployment (August 2014)

Click to enlarge


Projections from now until 2025

INDICATORS Medium Optimist
Annual Growth Rate 36% 40%
Nb of formed masons 4 000 6 000
Nb of annuals constructions site 7 600 10 600
Ha annuals NV 27 38
Nb of beneficiaries 310 000 400 000
€ generated localy 33 millions 42 millions


Read a Summary of Results & Impacts 2011-12 (13 pages, pdf, 600K)