The foundations of the type of materials are divided: concrete, bottled, brick, sandy, from prefabricated reinforced concrete. On soils that are not subjected to swelling, elementary foundations of large granular sand are built. In pits or trenches (respectively, for columnar or strip foundations), sand is folded in layers. Each laid layer should be a thickness of 10 to 15 centimeters, then it is watered with water and tamped well. A battle of brick, gravel or crushed stone on a solution of sand with cement is laid in the surface layer. A similar foundation is relatively cheap.
