How to Clean Up Moldy Carpet & the Floorboards Underneath

Moldy carpet and floorboards can cause a host of health problems for home occupants.
Allergies and compromised immune systems may develop if the mold isn't eradicated from the home. Oftentimes, severe moldy carpets are a sign of faulty foundations. However, any kind of flooding can produce fungal spores on carpet and floorboards. To find out if your carpet is moldy, look for any green or black discoloration. You may also notice a musty smell. Protect the health of your family by cleaning up mold and restoring the look of your house.

Step 1

Locate the moldy area by inspecting the carpet for discoloration or moldy smells. It's a lot easier to clean underneath the floorboards if the mold is in one area. Use a pair of pliers to lift the carpet from the edge of wall. Carpet is held on to the floor by rows of tacks that grab the carpet underneath. If you are removing the whole carpet for cleaning, roll up the carpet.

Step 2

Roll back the carpet padding that is sandwiched between the carpet and the floorboards. If the entire floor is moldy, roll it up and place it next to the carpet.

Step 3

Wet the area to prevent mold spores from flying up while you are working. Open all the windows to keep the room well ventilated. Scrub the floorboards with bleach and water until all of the mold has been removed. Wipe down the area with towels and place a fan over the floorboards to dry. Wait a few hours for the area to become dry enough to replace the carpet padding.

Step 4

Roll out the carpet padding. Mix detergent and water to scrub out the moldy areas on the padding. Disinfect the moldy areas with a solution of one and a half cups of bleach per gallon of water. Place fans next to moldy areas. Wait for the padding to dry.

Step 5

Spread out the carpet and scrub it with detergent and water. Place fans next to the carpet and allow a few days for the carpet to dry. Check the carpet for any mold before placing back on the tack strips. Place a knee kicker 3 inches from the wall and press down on the butted end, so that it grabs onto the edge of the carpet to pull to the tack strip.

Step 6

Place a carpet stretcher next to the wall that you have already stretched onto the tack strip. Set the other end of the carpet stretcher 6 inches from the opposite wall. Activate the lever, so that the carpet stretches over the opposite side wall's tack strips.

Things You Will Need

  • Pliers
  • Bleach
  • Scrubber
  • Fans
  • Detergent
  • Knee kicker
  • Carpet stretcher
  • Gloves
  • Mask


  • Allow the floorboards, carpet padding and carpet to dry overnight to ensure that you have killed the fungal spores.


  • Wear gloves and a mask to prevent breathing in fungal spores and carpet fibers.