Leviticus 14:38-42

the priest shall come out of the house, to the doorway, and quarantine the house for seven days.

Then the priest shall return on the seventh day and make an inspection. If the spot has indeed spread on the walls of the house,

the priest shall order them to pull out the stones with the spot on them and throw them away at an unclean place outside the city.

And he shall have the house scraped all around inside, and they shall dump the plaster that they scrape off at an unclean place outside the city.

Then they shall take other stones and replace the discarded stones, and he shall take other plaster and replaster the house.