Why is this wall discolored if it is not wet?
Mysterious wall stains that grow over time can appear completely dry to the touch, leaving homeowners unsure whether they indicate a hidden water leak or paint issues. This uncertainty makes it difficult to determine the correct way to treat the spreading discoloration.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
Found another way around this?
Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.
- 1Scrubbing the wall with TSP, rinsing, and applying an oil primer before repaintingDid this help you?
- 2Feeling the area with a hand to check for a catchy texture at the edgesDid this help you?
- 3Wiping off the spots using Clorox wipesDid this help you?
- 4Considering potential causes like gecko droppingsDid this help you?
- 5Wiping the surface or trying to clean through the paint layer.Did this help you?
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“We noticed this stain today which seemingly came out of nowhere — is this a sign of a leak or water spraying or something?”source ↗
“Vinyl siding developed these punctate brown areas of discoloration.”source ↗
“Just looking for opinions. Isn't wet and I've never felt dampness but seems like its grown over time.”source ↗
“No and no, its like its the paints seeping but it goes all the way to the ceiling corner”source ↗
“Its drywall and under paint. Wipes off. Looks like dirt but why would it be under paint.”source ↗
Where this came up
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