Leviticus 14:42-45

Then they shall take other stones and put them in the place of those stones, and he shall take other mortar and plaster the house. “Now if the plague comes back and breaks out in the house, after he has taken away the stones, after he has scraped the house, and after it is plastered, then the priest shall come and look; and indeed if the plague has spread in the house, it is an active leprosy in the house. It is unclean. And he shall break down the house, its stones, its timber, and all the plaster of the house, and he shall carry them outside the city to an unclean place.