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Can You Use Spray Foam to Stop Basement and Foundation Leaks?

Here’s the thing – there are a lot of people out there who push closed cell spray foam as a way to keep water out of your house. You know what? Closed cell spray foam can keep that water out, but that’s not a fix because it isn’t going to magically disappear or dissipate. Closed cell is water impermeable, which makes it great for a lot of projects, just not this one and here’s why.


The water is coming into your basement and through the foundation through cracks. Now closed cell will seal the cracks, but the water is going to build and pool behind the foam and eventually find another route in. The thing is, if you don’t address the problems that lead to the leaks and you add foam, the water will start pooling in other areas as well and now the foam is hiding it.


Wood rot is just one of the problems you could face if that water is allowed to pool unchecked. Another problem is affecting the grade around your foundation. If that water is pooling around the edges and corners of your foundation, then the grade is shifting, settling, and cracking the foundation itself because it is no longer on solid ground.


With all of this being said, spray foam can’t fix basement and foundation leaks.

Basement and Foundation Leak Repair


If you have leaks in your basement or foundation, spray foam absolutely isn’t the answer. There are measures that need to be taken that can vary greatly depending on your home’s needs.From spray sealants to total encapsulation, there are ways to fix this problem. The best bet is to call in a contractor who specializes in fixing these leaks for good so you aren’t left with the constant worry of another flood in the basement.



Once the leaks have been repaired, then you can think about adding spray foam insulation to your basement and rim joist for what it’s really designed to do -- keep outside air out.

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