How to deal with moisture trapped behind basement Drylok paint
Basement walls painted with Drylok trap moisture behind the coating, leading to efflorescence, staining, and long-term foundation risks. Because exterior excavation isn't always possible, homeowners are left trying to remove the paint so the wall can breathe and prevent structural damage.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
- 1Running a dehumidifier on a schedule or running a dehumidifier and fans 24/7
- 2treating pests, repairing damaged framing, and considering raising the exterior grade
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“Previous owner painted basement walls with drylok. Lots of efflorescence and staining.”source ↗
“Ideally I’d to remove the drylok and lime wash so the wall can breathe, but I wonder if I’m worrying about it excessively?”source ↗
“Would rather have a dank basement than foundation problems in the long run. Guess I’m hoping for someone to explain why it’s fine even though I know it isn’t lol”source ↗
Where this came up
People with this problem also raised
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- 3Why is there condensation and damp spots on walls only on laundry days?
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- 2How to temporarily waterproof a shower wall missing tiles