Sometimes it is inaccessible to defend your building from low temperatures from the outside, so doing it on the inside is the only way to go. Such work executed from the inside, however, is more hazardous than usual external solution.

There are various factors that could make it problematic.

Experts believe that insulating surfaces internally is less beneficial than doing it externally. However, there happen situations when it may only be executed from the inside. Insulation from the inside is seldom employed because it involves many problems. It is more difficult and tricky than the insulating of the house from the outside, known for many years, so resolutions were drawn from the mistakes made and a few solutions were suggested that exclude most of them. The major problem in a structure insulated from the inside is that after such an operation its constitution (external walls, ceilings) is ubicated in the unprotected zone. When there is no warming, the entire surface has a much higher temperature (to our detriment, due to the high heating costs) and solely a little external fragment is below 0 ° C. After applying the insulation internally, the temperature below 0 ° C will cover the greater diameter of the surface, because the heat will stop passing through it. That makes the wall much colder and more affected to low temperatures.

In case of insulation from the inside, the surfaces must primarily be protected against humidity. The penetration of water vapor arriving from inside the house into the middle of the obstruction is counteracted by vapor barrier with a properly selected diffusion resistance coefficient.