A network of experts in reproductive and children’s environmental health

PEHSU Factsheet: Flooding Aftermath > How should mold be cleaned?

How should mold be cleaned?

posted on Aug 23, 2021

After homes have been flooded, moisture can remain in drywall, wood furniture, cloth, carpet, and other household items and surfaces and can lead to mold growth. Exposure to mold can cause hay fever-like reactions (such as stuffy nose, red, watery or itchy eyes, sneezing) as well as asthma attacks. It is important to dry water-damaged areas and items promptly to prevent mold growth. Buildings that are wet for more than 48 hours will generally contain visible and extensive mold growth.

Some children are more susceptible than others to mold, especially those with allergies, asthma, and other respiratory conditions. To protect a child from mold exposure, clean smooth, hard surfaces such as metal and plastics with soap and water and dry thoroughly. Flood water-damaged items made of more absorbent materials cannot be cleaned and should be discarded. These items include paper, cloth, wood, upholstery, carpets, padding, curtains, clothes, stuffed animals, etc.

If there is a large amount of mold, hiring a professional to clean up the mold can be considered. If a homeowner decides to do the cleanup, they should:

  • Clean and dry hard surfaces such as showers, tubs, and kitchen countertops.
  • If something is moldy, and cannot be cleaned and dried, throw it away.
  • Use a detergent or use a cleaner that kills germs.
  • Do not mix cleaning products together or add bleach to other chemicals.
  • Wear an N-95 respirator, goggles, and gloves so that skin does not come into contact with mold. Also wear long pants, a long-sleeved shirt, and boots or work shoes.

Homes, apartments, child care centers, schools and other buildings that have sustained heavy water damage will be extremely difficult to clean and will require extensive repair or complete remodeling. It is strongly advised that children not stay in these buildings.