How can I prevent humidity and flaking in my basement foundation built in 1915 with a possible later addition to the original foundation?
Asked by Kjell Devik 
3 months ago
Last Updated: June 16, 2024
Can anyone offer advice on basement foundation issues? I have an old house from 1915 with an added section that I’m not sure about the year. I’m dealing with humidity problems and the cement foundation is starting to flake off. I think this lower wall layer might have been added to the original foundation. I already use a dehumidifier and fans during humid months, but it doesn’t seem to be enough to keep it dry. Is there a type of sealer I can apply to the cement to prevent further damage?
I just finished recording a whole hour for my podcast and radio show this weekend. Before that, though, I’d recommend checking the water outside. Make sure your gutters are draining properly into a downspout and away from the foundation, at least 10 feet into a storm drain system.
There is actually no water seepage. Drainage, gutters, and downspouts are all in good condition.
It’s just some condensation that occurs in the cool basement during the hot summer months when the humidity levels are high. (I live in ND)
Maybe I should consider getting a better dehumidifier?
ND is not exactly a humid place … it’s actually quite dry … although I’m sure you experience some humidity in the summer …. just not as much as in the deep south. I think the moisture mainly comes from the ground.
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Wow, that sounds really expensive!!!
I mean, when you’re dealing with a house that’s over 100 years old, you have to start wondering if it’s really worth it, right? 🤷♀️
I’m thinking maybe I should invest in a better dehumidifier option instead… and perhaps get rid of some of the stuff I have stored down there that might be affecting the dehumidifier’s effectiveness and airflow.
It could be quite a project if you decide to do a lot of it yourself. Using a backhoe might be a more efficient way to clear a ditch around the perimeter. Not sure, though.
I think checking out a built-in unit made by a company like Santa Fe would be a good idea. If you’re using a portable one, you’re probably using something way too small for the job.
There’s really no coating that will do the job. I suggest fixing the foundation cracks with carbon fiber. After those repairs, seal the seams with urethane foam to prevent moisture from seeping back in.
Hey , can you provide more details? What type of rigid insulation and vapor barrier are you referring to? And how should I go about applying them to the cement?
Next, take a look at the grading outside. Ensure that everything is sloped away from the house.
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Looking for a long-term solution instead of just a temporary fix. 😬
Becky, that definitely seems like a task for the professionals! It should be sealed from the outside by digging a trench all around the foundation, a big job indeed. This will help, and as someone else mentioned, make sure to extend the downspouts as far away from the home as possible.
Dry-loc is really effective