Before carrying out the laying of the coating, it is necessary to carry out preparatory work, align the floor. If this is a concrete base, then you should remove all irregularities, check the surface in level. These works are carried out either using a grinding machine or another tool. During work, do not forget to use special shoes and respirator. Then a gasket is laid on concrete — an isolon that protects the laminate from moisture and has a shock absorber function. If the base of the floors is wooden, for its alignment and strengthening it should be laid plywood, on which an insolo layer is already laying.