You are a happy tenant of big, own house in the village? That is really great, but possibly you are paying many or money for your heatiing system during the winter season. Especially if your structure was create couple dozens of years earlier, when no one know any professional external wall insulation systems, and windows were porous.
Why is the external wall insulation that relevant while erecting a house?
Depending on the thermal insulation parameters of the walls, their dimensions and the technique of warming the building, energy worth several thousand zlotys annually can slip away from the house.