Prevent basement mold / Discussions

What is the best insulation for basement walls?

...basements Why basements are moldy and how to avoid it Choosing the best insulation for basement renovations Those pages should help a lot, but a few things to mention - I see your point about how the uneven walls will be tricky if you count on rigid foam boards against the concrete to stop the inward drive of moisture...

Posted by Paul D March 28, 2025 Basements improvements 1 response

What is the best way to install 5" of XPS rigid foam on interior basement walls?

...basements properly so they won’t go moldy Wood studs will almost certainly be wet when you buy them and install them, that is what you need to allow to dry to the interior since they can’t dry to the exterior. Putting wood studs against a basement wall and then putting plastic over them is why almost all basements smel...

Posted by Sean MacDonald June 14, 2021 Foundation and basement improvements 8 responses

Will spray foam on basement walls prevent condensation?

...preventing it from drying. Despite it being allowed (and usually insisted upon), putting vapour barriers on basement walls does nothing good, but it does a lot of harm. You can read more here –  Why are Basements Moldy? How to Fix & Prevent Mold in Homes  The short story is that concrete is wet and dirt is wet, so ...

Posted by Michael Scott April 12, 2021 Basements improvements 3 responses