The blend of different cultures – western and African – is a laboratory where the idea of cooperation is devoted to common (inclusive) knowledge at a time when knowledge is more and more rooted in the concept of intellectual (exclusive) property. This specific case is about a kind of brick – the brique magique – that is made with locally-sourced materials in Niger, though modified in shape and structure to improve its performance in terms of thermal inertia for the comfort and liveability of homes.