Pathological analysis of adobe (banco) constructed habitats in the city of N'Djamena in Chad shows that the most frequent defects observed are, among others, the abundant appearance of cracks, the erosion of external walls, water infiltration and subsidence. At different stages of identification for the choice of material (earth), brick production and its implementation, this work proposes simple and practical solutions to avoid the above mentioned defects resulting from traditional techniques. Thus, geotechnical tests are proposed to identify the right soil, rice bales must replace the straw for earth treatment and finally a foundation system (insulated sole - primer post - underbody wall - sill) of reinforced concrete must be constructed to ensure the stability of the structure.