Remove all furnishings and carpeting. Strip the drywall off and remove all insulation batting in the walls. Use fans to thoroughly dry the area. Next, shut off power to the area and spray a 5 to 1 water/bleach solution on all structural wood, wall cavities, and floor surfaces. Then pressure wash the areas you sprayed with the bleach water solution. Remove all excess water from the area. Once again, use fans to dry the area. You are now ready to start refinishing the rooms.