Leviticus 14:42-45

Other stones will be brought in to replace the ones that were removed, and the walls will be replastered. “But if the mildew reappears after all the stones have been replaced and the house has been scraped and replastered, the priest must return and inspect the house again. If he finds that the mildew has spread, the walls are clearly contaminated with a serious mildew, and the house is defiled. It must be torn down, and all its stones, timbers, and plaster must be carried out of town to the place designated as ceremonially unclean.