Aerated concrete blocks in their structure have open pores with a developed system of moves, and therefore any decoration will not suit them. For example, they cannot be plastered with ordinary cement mortar and painted with paints that create a film, as this prevents the withdrawal of air vapors out of the internal premises of the house. But you can’t leave blocks without finishing — the pores of blocks absorb dust and rain water over time, which leads to surface pollution and moisturizing the walls, and this significantly reduces the thermal insulation qualities of the walls themselves. Of course, it is possible to clean the polluted walls, how to do it here, but it is better to immediately finish.