Improving housing is a staged process, and the first stage is a good foundation, to provide a firm base and stability for the building. There are several types of foundations, and the construction of the foundation is itself dependent on the weight of the house and on the strength of the soil. The methodology advocated by MRHP offers a low cost and affordable alternative to concrete foundations, with the basement area filled with quarried, irregularly shaped rocks. Some stones can be crushed in smaller pieces and overlain with a cement cap, which protects the building from ants and termites.
In many cases a good foundation is as much improvement as a household can afford for a number of years, but a good foundation prevents insects from coming into the house through the floor, so MRHP is keen to encourage this practice, through dissemination of information and training and even assisting with the transportation of heavy stones and other materials. The construction of strong foundations as put into practice by MRHP in the villages and in small towns in Tanzania has spread fast and has created job opportunities for technicians and labourers. Additionally, stone-crushing has become a source of income.