Removal Of Black Mold Damage From Bathroom Floor Joists

Posted on: 16 September 2015


As you already know, black mold colonies in your home are toxic to your family and pets. If you've found the tell-tale signs of black mold on the floor joists in your home's bathroom, then you need to remove the mold and fix any wood rot that is present.

The proper procedure to remove black mold from bathroom floor joists is as follows:

1. Dress in Protective Clothing and Shoes

When you are working on the mold damaged flooring, you must wear a respirator that is approved for use with mold and mildew spores. You need to protect your lungs because inhaling the spores can make you very ill.

Additionally, you need to wear a disposable protective body suit and sturdy work boots. You can purchase an inexpensive protective suit at any home improvement store.

2. Inspect the Entire Area for Water Leaks and Mold Staining

Chances are, if you have one area of flooring that has mold growth, then you probably have a few more in the same general area. For this reason, before you start working on the floor, first inspect all of the surrounding areas to see if you can locate any other mold colonies.

During your inspection, you also need to look for any signs of currently leaking water or past water damage, such as:

  • water stains on the wood
  • wood that is soft
  • circular areas of dirt under the joists.

3. Fix Water Leaks in the Plumbing

Mold requires moisture to thrive. So, if your wood joists have mold growing on them, then you have a plumbing leak. Some of the most common leak areas in a bathroom are:

  • around the base of the toilet
  • under the sink
  • around the bathtub or shower

In addition, sometimes when caulking ages it will crack and water will leak from tile or sink areas. If you find any cracked caulking, then you should re-caulk to prevent moisture from leaking into the walls and flooring.

4. Spray Chlorine Bleach Solution on the Black Mold

To remove the black mold from the floor joists, spray them with a bleach solution. Place a mixture of one cup of chlorine bleach with a gallon of water into a pump sprayer. Spray any area that is black from the mold and let the solution dry on the wood.

Once the bleach has dried, if you see any signs of black mold still present, then repeat the spraying until they have all been removed.

Additional Assistance

If you need additional assistance removing the mold from your bathroom floor joists, then you should contact a water damage contractor in your local area. This type of contractor is experienced in safe black mold removal and fixing any related water damage to the structure of your family's home.