3 Sign of mold under the hardwood floor and how to remove it?

A sign of mold under the hardwood floor is that it smells musty in your home. Mold discharges gas which has a musty smell. 

There are various floors, and amongst them is the hardwood floor. Hardwood flooring is famous for its simple design. However, hardwood floors face the problem of mold. 

Mold is a tiny fungus forming on animals and vegetables. It’s associated with moisture or decay. Its growth on a surface can be harmful and must be treated well. 

Many people might question how mold grows on hardwood floors, what their signs are, and how this problem can be solved. Well, all of their questions have been answered below.

Sign Of Mold Under The Hardwood Floors

Sign Of Mold Under The Hardwood Floors
Sign Of Mold Under The Hardwood Floors

If your hardwood floor is discolored, warped, and distorted, it is a vital sign of mold. Mold always appears to be staining, green-colored stuff growing on your hardwood. Here are three of the symptoms of mold under hardwood floors.

Weird Musty Smells

You may have a mold infestation if you notice a weird pungent, musty, earthy smell in particular areas of your home.

The aroma is unpleasant to the nose since it reminds you of decomposing biological materials. Another symptom of a mold infestation is a comparative investigation of the floor region with the mustiest odor.

Floorboards With Discoloration

Floorboards that are discolored, deformed, or warped are a sure sign that you have a mold problem. On hardwood floorboards, mold generally appears as discoloration, staining, or fuzzy colored growth.

A simple water incident most commonly causes mold infestations. A leaking sink, a backed toilet, or an overflowing tub are all possibilities. A mold infestation may be accompanied by damaged flooring, depending on the extent of the infestation.

Visual Verification

Peek beneath the floorboards if you find a discolored or water-damaged portion of your flooring. Remove a small part of the floor and look for mold beneath the boards.

Causes Of Mold Under Hardwood Floors 

High humidity and moist areas have a greater chance of having mold. The same applies to the hardwood floors too. When they are too watery, damaged by water, or flooded, they are likely affected by decay. 

It leads to a question: what amount of moisture or water? Well, the water needs not be too much. The mold can grow from the day-to-day spill of water. So next time when you spill water on your hardwood floor, be quick to wipe it up. 

Too much mopping the floor can make it worse too. If you mop your floor too many times, clean the floor with a clean, soft cloth and make sure that no water remains on the floor. 

Prevention Of Mold On Hardwood Floors 

Prevention is better than cure, and it’s more important to prevent mold from growing than to treat it. Prevent yourself from roaming around with wet feet after a shower. 

Other than this, use a vacuum cleaner or steam mopping. Please keep your pets away from the hardwood floor, as their pee can damage your floor and help grow mold. 

Mould can grow because of too much humidity in the house too. Also, it can grow if some water pipeline is damaged.

How To Remove Mold?

There are several ways to remove or kill mold. There are products to remove black mold from hardwood floors, and on the other side, it can be removed using homemade items. Here are some ways to remove mold from your hardwood floors and make them look clean again. 

1- Be Quick 

Once you have identified and found the mold on your hardwood floor, you need to remove it quickly. It is said that early prevention is better than cure. 

2- Clean The Area. 

To remove the mold from your wood floors, you need to be very careful, and to do a perfect job, you need to clean the room thoroughly. Remove all the unwanted things or empty your room. Dispose of the items infected by mold, and put others under sunlight. 

3- Seal The Area 

After cleaning your room, the next thing that needs to be taken seriously is to seal the area. The mold area can be dangerous. Stop anyone who tries to visit the affected area. Open Windows, and allow the fresh air to pass through. 

4- Removing The Affected Area 

Once you have completed the first two steps, the third step is to identify and remove the affected sections of the hardwood floor. Don’t forget to wear hand gloves while doing this job. Remove all the affected areas and remove a bit more than the affected ones to avoid any possible danger. 

5- Cleaning The Area With Water 

Spray the affected areas with water because water pushes down the mold particles if there are any left. This would clean the surface and would make it easy for further steps.

6- Inspecting The Mold Affected Area.

Carefully check the whole floor and sort out the affected ones and ones which are clean and clear from the mold. Clean the area and sort out the site. Dispose of the affected ones, and keep the damaged section aside. 

7- Clean The Subfloor 

When you have sorted out the sections/area, clean the subfloor with one cup of borax with one gallon of water. Mix borax with water and mop the floor and clean it.

8- Allow The Borax Solution For 10 Minutes. 

After mopping the surface with borax solution, leave it for ten to fifteen minutes to allow the borax solution to show its best results. This solution pushed down the mold. After leaving it for 10/15 minutes, scrub the area with a stiff brush, and clean it. 

9- Reapply The Borax Solution. 

Apply the borax solution again and leave it again for 10 minutes. This time the mold will have no chance of being there, and the floor will be cleaned. 

10- Make A Fresh Batch Of Borax Solution. 

Please make a new batch of borax solution and apply it to the affected area. Scrub the area and clean it thoroughly. Clean the unaffected area too. Leave it for 10 minutes and clean it.

11- Remove Dead Mold

Remove the dead mold with a vacuum or by mopping with borax solution. You can use a borax solution, but be careful. If you over-moist the hardwood floor again, it’ll start molding again. Hence, all the progress will be lost shortly. 

12- Replace The Hardwood Floor Sections 

When you have finished removing the hardwood floor sections affected by mold, you need to replace them. Either you get the same design and colors or have to change it wholly. Lastly, clean the items taken out of the room with a borax solution and then set them in the room.

What Kills Black Mold On Wood? 

Kills Black Mold On Wood

Vinegar is best to kill black mold on wood. Most authorities suggest that one uses 5 to 6 percent clean vinegar in diluted vinegar in water. Then Spray the solution at full pressure on black moldy wood to kill the mold. But full diluted vinegar can cause damage to your waxed or delicate wood finishing. 

Apply the solution to wood to kill the black mold and wait for an hour to see the result. Afterward, scrub the affected area and wipe it. 

Repeat the process: 

Repeat the vinegar process, wait for an hour and scrub again. Then wipe it out with water or a soft clean cloth to see the results. Note that too much scrubbing can cause mold growth as mold grows in moist areas. Make sure to make the wood dry and clean again. 

Products To Remove Black Mold From Hardwood Floors

Apart from the homemade things and techniques, a person can use products specially made for killing the black mold under hardwood floors and on any other surfaces. The most popular ones are RMR-86 instant mold and mildew stain remover spray, Tilex mold and mildew remover, and the mold control jug. 

1- RMR-86 Instant Mold And Mildew Stain Remover Spray

This product helps remove mold, mildew, stains, and dirt instantly. This spray instantly kills the particles of black mold and stubborn stains. 

2- Tilex Mold And Mildew Remover 

This powerful spray helps you kill black mold and stains by 99 percent. You don’t even have to scrub. It makes it easier to remove household mildew and mold and helps the wood and other objects affected by decay remain clean and attractive.

3- The Mould Control Jug

The little green monsters, also known as mold, are gone now because this product is specially made for mold control and its prevention. Using the consortium mold control is very easy.

To use this product, you need to spray it through a garden sprayer and clean the surface with a soft cloth to see the ultimate result. Note that you need not scrub as it can lead to harshness and may lead to damage to the affected area or the thing. 

After cleaning it, you can see the results. If you are not satisfied, repeat the process. It also helps get rid of foul odors rising from the affected areas. 


So this was all about sign of mold under the hardwood floor and how one can clean, kill or treat mold hardwood floor water damage, and make their wood floors clean and shine again. However, if you still face the problem, you can contact an expert person to clean and kill the mold away from your hardwood floors. 

Don’t keep your hardwood floor moist, don’t run with wet feet, spoil water or any other liquids, and prevent pets and children from peeing on the floor. 

Remember that prevention is always better than cure; you can protect your hardwood floors if you try your best and try in the right direction.

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