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Mold Removal

When you think about mold in the household the first locations that come to mind are the basement and attic, and rightly so since they are the most common occurring places for mold growth due to their inherently damp environments.
However, to my surprise I recently discovered mold growth in the the corners of the bedrooms, specifically behind furniture placed close to an exterior wall. My home is fairly old and has poor insulation, so during our cold winters there is a chance of condensation along the walls. In this case anywhere behind furniture where there is minimal airflow.
Pictured above is the mold discovered in my son's bedroom behind a desk. The desk has been there for a few years, so every winter the mold has gradually grown when damp conditions developed.

I'm going to remove and treat this with some common household products and with the help of a product specific to mold removal called Concrobium Mold Control.
Concrobium mold control bottle


First thing I will do is put on some nitrile gloves to prevent my skin from having direct contact with the mold and cleaning products.
Nitrile gloves


I'm going to remove the heavy surface mold with pure white vinegar. For this step vinegar will do a better job than plain water and yet it's not a harsh chemical that will damage the surface.
Pure white vinegar


Pour some on a paper towel and start wiping off as much mold as possible. You don't need to scrub too hard, and depending on the size of the mold area you may have to do multiple passes.
Wet paper towel with vinegar
Wipe mold off with vinegar


The mold wasn't very difficult to remove, however it did leave some staining. It may be hard to see in the picture but there are still home dark patches the vinegar was not able to remove.
Wall after vinegar wipe


I could have left it like this and applied the specialized mold removal product now, but I wanted to remove the stains not only for esthetic reasons, but also to easily identify if new mold growth returned in the future.
For this I used a common household bleach cleaner. I sparingly sprayed some on a paper towel, I only want to use enough to remove the mold stains, and not too much that will damage the wall or decorative moulding.
Bleach cleaner
Bleach cleaner on paper towel


Gently scrub the stained areas and you should see them disappearing almost instantly. Any tough spots just hold the paper towel over them for a few seconds to let the bleach do its job.
Remove mold stains with bleach cleaner


With a final wipe of vinegar to remove any left over bleach cleaner the wall doesn't appear to have any mold stains, or any indication that mold ever existed there. Make sure you do try to remove any residue bleach from the surface so that it doesn't interfere with mold treatment solution.
Wall after bleach wipe


Now to treat the mold and prevent it from returning I will spray on some Mold Control solution. I reused an old spray bottle and filled it with the solution.
Mold control solution in spray bottle


I'll spray it on evenly wherever the mold was spotted previously, and let is soak in and dry over the next 24 hours.
Spray mold control solution on wall


And that's it, we are done.

Some tips to prevent the mold from returning:

  • Leave more space between the furniture and wall to allow for better airflow.
  • I noticed lots of dust and cobwebs clinging to the walls. This would definitely contribute to the mold as it traps moisture and is most likely where the mold initially takes root. Dusting the walls in the early autumn would be a good routine.
  • Consider spraying the Mold Control solution every autumn as a preventative measure.


    Here is the video of the mold removal process...
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With 20+ years experience in programming and website development Simon has recently dipped his toes in electronics, and inspired by many great bloggers preceding him he created Simon Says Anything.
Toronto