Internal thermal insulation provides for its advantages and disadvantages. As a rule, experts use polyurethane foams for internal work for internal work. So, the advantages: • the internal method of thermal insulation is perfect as additional insulation of the basement; • also, internal thermal insulation is laid in rooms that are poorly heated. The disadvantages of internal thermal insulation are: • low ability to maintain heat; • despite the advantages, heating costs are high; • if you turn off the heating system, the air in the room will quickly cool; • For the water supply there is a danger of frost to freeze.