Leaderboard

Asbestos was certainly used in some flooring mastics, but my recollection is that all those mastics were black. The yellow stuff is more modern. If you want to be sure, just scrape a bit into a baggy and have it tested. The testing is cheap and it'll give you peace of mind.

Hi Mia, Mold creates black stains that are not mold, but still black. So the black areas might not be mold. Any mold testing company can easily test those areas and tell you precisely what molds are or are not there. But why bother? If there's mold there and the area stays dry, the mold will not grow and will never cause anyone any problems. If you clean up every molecule of mold and then let the area get wet, new mold will grow again. That's why Mike Lamb was telling you to check for moisture. That's *way* more important than obsessing about whether or not the black

It looks like there were water problems at the corner. The radiators were leaking? Make sure there are no ongoing moisture issues with the pavement. Cover the area with plastic taped at the edges and see if you get any condensation underneath. I'm not a big fan of mold testing.

That's how it would look even if the parquet had been free of active mold growth, but since there's a history of mold issues, I'd get a mold remediation contractor out there to confirm that the mold issue is gone before you put down new floor finish. Just to be sure.