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What is that black stuff under my vinyl basement floor tiles?
Hi,
I've seen posts about black mastic adhesive, but I'm not sure if that's what I've found.
My basement carpet got wet during the nor'easter last weekend when my power went out, preventing my sump pump from working.
It wasn't the 1st time this carpet got a soaking (no measurable water, but it was pretty squishy;), so I decided to remove it and the padding. There were some dark spots on bottom side of the carpet, but mostly near the edges, and the padding was in surprisingly good shape (the carpet was probably close to 20 years old!). However, under the carpet I found 9"x9" thin vinyl tiles, so I started pulling them up too. I used a putty knife, and some of the tiles came up very easily, but others cracked, either because they were more brittle or because they were stuck better? There was some moisture under the tiles, but what really concerned me was the 'black stuff'. It isn't sticky, and isn't 'lumpy', and I could get small bits to come off by scraping. My wife was convinced that it was mold, but I thought it was some kind of adhesive.
So, to (finally) get to the question(s):
1. Could this be mastic adhesive?
2. If so, does it contains asbestos?
3. Could the tiles contain asbestos?
I'm attaching a jpeg image that shows the tile and the 'black stuff' (and the edge of the floor with newer concrete where the french drains were added). Hope this helps!
Thanks for any and all comments!