Plates must be closed

Initially, it is necessary to remove the flooring of the floor, then the board is attached to the bottom (outside the room) over the entire area, on which the insulation is subsequently laid. The joints of insulation plates must be closed with mounting foam. Then, all the previous layers are covered with a steam outlet and attach it to the bars (20x30mm or 30x30mm), it is also recommended to glue the joints of the material with metalized tape for a greater vapor barrier. In the end, the main flooring.