Remove Items That Suffered Damage
The first step in getting rid of the musty odor is to remove any items or materials that suffered severe water damage. This includes ceiling tiles, dry wall, insulation, upholstery, linens, and any damaged, appliances, furnace, water heater, furniture and mementos. Tear up water damaged carpeting including the padding underneath, which could harbor mold and keep the area smelling stale.
Mold thrives in warm environments so reduce the temperature in the area with the damage. Start circulating the air throughout your home and dry things up by running dehumidifiers and large fans. Open doors and windows close to where the water damage occurred to let in fresh air and to help get rid of any pungent odors.
Clean the Damaged Area
Scrub down areas and surfaces with cleaners made especially to get rid of mold and mildew. Wipe down walls, baseboards, tiles and flooring thoroughly. If areas of carpeting did not sustain severe damage, replace padding and have the carpet professionally cleaned. Another option is to sprinkle baking soda on floors and surfaces throughout the water damaged areas. Shut the windows and doors and let sit for 24 hours. Using a vacuum cleaner, with hose attachment, remove the baking soda. After the furnishings have been replaced, set up a dehumidifier/air purifier to keep the room smelling fresh and clean.