>>43543003OOTL but soaked in what sense? Radioactive material bonded with or mixed into non radioactive material or normal material irradiated by outside radiation?
Also, I think it would much depend on the building in question. If its a space ship or something and you want to avoid the outer hull of the ship becoming irradiated, for example, it can be as simple as just covering the ship in a layer or radiation shielding that you just strip off and replace once every few years.
