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re: More house drama. Found mold behind baseboard in basement.

Posted on 7/9/25 at 8:52 pm to
Posted by 9rocket
Member since Sep 2020
1639 posts
Posted on 7/9/25 at 8:52 pm to
Don’t panic. Just because it’s black doesnt mean it all has to be ripped out. Stopping the moisture is the main thing. Mold cannot survive without moisture, air, and a food source. Stopping any one of the three (preferably moisture) will do it.
It might just be the lower portion of the wall, anything higher than baseboard height up to four feet is the same (basically).
Find out where the worst section is and work out from there.
A good dose of the mold killer will work well. Alternatively, hydrogen peroxide mixed with boric acid will also work.
Remember, it’s just drywall (probably), and you’ve proven you can handle that.
Posted by BoogaBear
Member since Jul 2013
6989 posts
Posted on 7/10/25 at 7:10 am to
If it were me, yes I would get a lawyer involved as a side step but I'm paranoid. I'm ripping out the bottom 4 feet of drywall in the entire basement so I can see what I'm working with.

I would always worry/wonder if another mold issue would pop up if I didn't do it that way.
Posted by 9rocket
Member since Sep 2020
1639 posts
Posted on 7/10/25 at 11:16 am to
Yes, that’s what I would do. Cut out the bottom few inches in a few places to see if it’s widespread or localized, then rip out the bottom four feet if the backside is anything but perfect.
Posted by Tree_Fall
Member since Mar 2021
1082 posts
Posted on 7/10/25 at 11:54 am to
quote:

sump pump


It's been a long time since I lived where houses had basements, but I pretty sure the presence of a sump pump means that there was a major moisture problem before the house was sold. The previous owner finished a basement that hadn't been fully prepped by sealing the floor wand walls.
Posted by jlovel7
NOT Louisiana
Member since Aug 2014
23836 posts
Posted on 7/10/25 at 2:58 pm to
So I got the moisture meter today. Everything was in the teens percentage wise but I was in a rush. Will go back and test more locations later. Generally it was from 14-17%. I tested right at the baseboard and as far up as the chair rail molding. I need to research what truly acceptable levels are but this is within the range from some posters here that isn’t so bad it seems.

Additionally the room is still 60-65% humid as the dehumidifier doesn’t arrive until next week. So hopefully removing humidity from the room itself will get the drywall to dry out more.


Trying to figure out now how much drywall to replace.
Posted by 9rocket
Member since Sep 2020
1639 posts
Posted on 7/10/25 at 3:17 pm to
See my last post.
Posted by LSUfan20005
Member since Sep 2012
9137 posts
Posted on 7/10/25 at 7:37 pm to
I’d cut a small square out and see if the backside feels wet or it the studs have any sign of mold. Odd that your reading is so low if it’s really black all over.
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