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How to Clean Up Moldy Carpet & the Floorboards Underneath

Updated November 21, 2016

Mouldy carpet and floorboards can cause a host of health problems for home occupants. Allergies and compromised immune systems may develop if the mould isn't eradicated from the home. Oftentimes, severe mouldy 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 mouldy, look for any green or black discolouration. You may also notice a musty smell. Protect the health of your family by cleaning up mould and restoring the look of your house.

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  1. Locate the mouldy area by inspecting the carpet for discolouration or mouldy smells. It's a lot easier to clean underneath the floorboards if the mould 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.

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

  3. Wet the area to prevent mould 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 mould 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.

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

  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 mould 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.

  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.

  7. Tip

    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 fibres.

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Things You'll Need

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

About the Author

Faith McGee
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