After the lighthouses are securely strengthened in the layer of solution, you can start backfill. By the way, floor insulation with expanded clay should be carried out using the material not only as a spiver, but also with it in the screed itself. In combination with this material, the use of an exclusively high -quality cement mixture is allowed. To increase the strength characteristics, you can use a reinforcing metal mesh. Fall asleep expanded clay as possible, somewhat compacting it. After the backfill of the material has come to an end, it must be shed by a liquid solution of cement. This is necessary so that the particles do not leave on the sides when you fill the main part of the solution. Speaking otherwise, expanded clay must be given to “grasp”.