Painted concrete basement floor keeps dusting and crumbling
Concrete floors dust and crumble when the surface is inadequately prepared before painting or damaged during renovations. This breakdown lets dust push through the failing paint and prevents you from maintaining a clean, sealed surface.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
- 1Filling the center under the level repeatedly with leveling compound
In their words
Unedited, most upvoted first, each linked to the thread it came from.
“Had my concrete basement floor repainted. This one part was a little damaged from a renovation and keeps dusting.”source ↗
“Paint started to crumble and more dust is coming through.”source ↗
“Struggling with trying to flatten the concrete. Theres a big dip in my subfloor, with a 5/16th gap under my 6.5ft level. Do i need to keep filling the center under my level?”source ↗