This probably belongs on the Reno board, but...

young-gardenerSeptember 9, 2011

Does anyone know what this dark stuff on our wood is and if sanding will remove it?

Today, I uncovered it during a wall project. I'd LOVE to expose the wood if we can. This is the last room without wood.

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marti8a

Is the tile on top of the wood floor or is there plywood between the wood floor and the tile? Or is that vinyl flooring between? Hard to tell from the picture but it looks like mastic.

If there is any chance that was put down before 1980, the VERY first thing I would do is get it tested for asbestos.

If no asbestos, and it is mastic, it can be sanded off.

    Bookmark   September 9, 2011 at 6:33PM
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young-gardener

Hi, Marti!
From top to bottom we have: tile/mastic, linoleum, plywood, black/dirty goo, hardwood.

I hadn't thought of asbestos. I'll look into that.

    Bookmark   September 9, 2011 at 10:09PM
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marti8a

I think I'd either ask on the remodeling or old house forum, or find a construction forum somewhere else. There might be another way to remove it that doesn't involve sanding.

    Bookmark   September 10, 2011 at 12:13PM
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sergeantcuff

I removed black goo from my pine floors by covering the area with wet rags for a few days. Then I was able to wipe up most of it, scrape the rest. I had similar layers in a 1930s house. Your goo may be different from mine however. Good luck!

    Bookmark   September 12, 2011 at 2:05PM
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young-gardener

Thanks for the tip, Maureen! I also read on the reno board that a steamer helps. I never would have thought of that.

    Bookmark   September 12, 2011 at 2:10PM
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