Insulate the walls, but

The walls from the outside of the room are always exposed to harmful influences. This is excess humidity, precipitation, radiation of ultraviolet radiation, microbes, temperature changes and other. And in combination, all these moments work simply deadly. For example, with frost, the wet wall not only completely freezes, but also begins to crumble, and ice from small cracks forms faults. Naturally, there is a need not only to insulate the walls, but also to protect them from harmful external actions. And this is entirely affordable for modern repair developments.