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Unread 11-22-2020, 03:30 PM   #1
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Join Date: Mar 2016
Location: Colorado Springs, CO
Posts: 35
Engineered HW Floor Over Thinset

I am pulling up some 1980s tiles that are in my foyer. The plan is to use 1/2" engineered hw floors. The manufacturer specs 15# felt (aka tar paper) over the subfloor.

I popped a couple of tiles up, and there is a think layer of mortar remaining besides the troweled ridges which I of course will chip off. Per the attached photo, will just removing the troweled mortar followed by a light surface scrape be sufficient to have a stable floor? I am concerned about a "crunchy" sound when walking on it. I suppose I could test it, but am wondering if anyone has experience with this. Thanks.
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