Should lay the foundation below the depth of soil freezing, the magnitude of which varies, usually ranging from 80 to 240 cm, depending on the region (for Moscow, for example, the figure is 140 cm). Under heavy walls (stone, brick, concrete, etc.) put tape foundations around the perimeter of the exterior and interior walls. Under the wooden walls as well as deep freezing and heaving soils – columnar. The material used for foundations in situ concrete, concrete blocks, clay brick, iron ore, etc. In order for the foundation last longer without breaking, it is necessary to seal the. Usually used for this purpose bitumen emulsion and special protective mastic (Giperdesmo "," Rabberfleks "," Stromiks ", etc.). In addition to waterproofing, as a rule, make insulation, which is logical: the heat loss through the foundation can reach 15-20%. Formerly widely used for insulation foam, today no less popular with extruded polystyrene (Styrofoam, Penopleks, Styrodur, etc.) – both are indifferent to the material to absorb moisture and biodegradable.

Traditionally it was thought that the wall made of homogeneous material, it is safer than a multi-layered. However, the durability of the material of homogeneous structure decreases with time. In addition, today's building codes (SNIP 23-02.2003) establish a number of stringent requirements for durability, noise and heat insulation of buildings, and experts say that to achieve compliance, if the house walls are made of the same material, almost unreal. World practice demonstrated that the benefits of multi-wall structures are greater durability and less weight to the building.