Leviticus 14:42-45

Then the owner must put new stones in the walls, and he must cover the walls with new clay plaster. “Suppose a person has taken away the old stones and plaster and put in new stones and plaster. If mildew again appears in his house, the priest must come back and check the house again. If the mildew has spread in the house, it is a mildew that destroys things; the house is unclean. Then the owner must tear down the house, remove all its stones, plaster, and wood, and take them to the unclean place outside the city.