The internal insulation of the walls and floor of the basements is successful with the builders thanks to the convenience of work and the possibility of repair in the future, since in this case the insulating layer is always almost available for corrections. However, such isolation, arranged without priorly eliminating the pressure of groundwater, usually does not last long and even if the pressure of the water is eliminated during the work, in the future, under the influence of the restored pressure, it swollen by bubbles and falls off. Therefore, the use of the internal insulation of the basements is permissible only with very small surface and groundwater manuals or in cases where it is impossible to make external isolation or its device will cost too much.