Leviticus 14:42-45

Then they shall take other stones and replace those stones, and he shall take other plaster and replaster the house. “If, however, the mark breaks out again in the house after he has torn out the stones and scraped the house, and after it has been replastered, then the priest shall come in and make an inspection. If he sees that the mark has indeed spread in the house, it is a malignant mark in the house; it is unclean. He shall therefore tear down the house, its stones, and its timbers, and all the plaster of the house, and he shall take them outside the city to an unclean place.