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Old 01-23-2014, 12:29 PM   #1
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Mold on cencret walls


I have mold spores and black mold on my basement walls. I have read that bleach isn't a permanent solution what should I use that will kill it completely so I can drywall over it

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Old 01-23-2014, 04:45 PM   #2
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Mold on cencret walls


Bleach will render the mold inactive. If you are not comfortable with it, you can use a mildewicide instead.

Have you identified the source of the mold growth? Regardless of what you treat it with, if that is not addressed, it will come back.

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Old 01-24-2014, 09:11 AM   #3
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Mold on cencret walls


Mold doesn't actually feed off of the concrete, but rather organic material in the nooks and crannies. In order for it to grow you need to have a food source and moisture plus favorable conditions. Figure out the cause and deal with it. Clean it with whatever you decide and seal up the wall with a concrete sealer or the proper paint.
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Old 01-24-2014, 11:04 AM   #4
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Mold on cencret walls


A bleach solution will definately kill the mold. Use a stiff nylon bristled brush to scrub it off and then rinse it thoroughly. BUT, as said above, if you don't get the moisture under control it will return as soon as some dust accumulates on the surface. On top of that, if the block is uncoated, you have plenty of pores for dust and dirt to hide in, making it extremely difficult to properly clean.
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Old 01-24-2014, 11:54 AM   #5
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Mold on cencret walls


That wall is not really porous but it is. it allows dirt and other organics to build up and the mold spores wake up and start to do their job. a few things to do. clean it with a good bleach solution. then let it dry really good. get rid of the high moisture content. seal that wall with red guard or Hydroban don't have a fit when you see the cost per gallon. You have one chance and one chance only to do it right. then you can frame the wall in and insulate sheetrock ect.
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Old 01-24-2014, 12:40 PM   #6
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Mold on cencret walls


High humidity could also be a problem.

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