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Unread 02-19-2020, 02:43 PM   #1
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Adding plywood over not-so-pristine subfloor

Took up some sheet flooring and am back down to 5/8” plywood subfloor. Was going to add a layer of 3/8” ply, but the subfloor is gouged in some areas through the top layer of ply.

Do I need to fill or flatten out those areas before adding the 3/8”?
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Unread 02-19-2020, 03:40 PM   #2
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Location: Boerne, Texas
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I'm guessing you plan to install ceramic or stone tile, Lou, in which case I would use nothing less than nominal half-inch ply, but even then I'd wanna fill those divots. Most likely with water putty.

My opinion; worth price charged.

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