If they want to insulate the semi -basement, then expanded clay must be filled during flooring or replacing the black regulatory. To do this, at first they make a pillow of sand and pebbles, there is a film waterproofing on top (it warns the capillary fluid leaks from the soil), then expanded clay, and its level should coincide with the height of the Chernopol. To save material, filling is performed only from the inside, more precisely, along the inner contour of the house. To do this, make a wood formwork, firmly fix it with struts, and expanded expanded clay between the base of the house and the formwork.