How to insulate the wall in the apartment from the inside from dampness

We live in a prefabricated house and in winter in an apartment it’s cold even when the heating is working. The external walls are constantly wet, mold appears and the wallpaper deteriorates. Tell me, what materials can insulate the walls from the inside, so that it is effective and inexpensive.

Elena

Answer

Elena! Unfortunately, the question you raised is of interest to hundreds of thousands of families living in panel high-rise buildings. The appearance of moisture on the inner surface of the walls indicates both high humidity and insufficient thermal insulation of the room. Fortunately, today both factors can be easily eliminated. The first - by repair or modernization of the ventilation system, and the second - by a set of measures for thermal insulation of housing.

Of course, it is best to be insulated from the outside - this will not only allow the use of any materials, but also will not steal precious centimeters of living space. If this is not possible, then under the wallpaper you can glue the roll insulation of foamed polystyrene with a thickness of 6-9 mm. Despite the small thickness, the heat-insulating ability of such a coating is equal to a monolithic wall "half a brick" and often such insulation is enough to eliminate dampness. If significant insulation is required, then use plates of extruded polystyrene foam, mineral wool or ecowool, which is hidden behind a structure made of drywall.