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Unread 10-27-2020, 08:46 AM   #5
cx
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Join Date: Jul 2001
Location: Boerne, Texas
Posts: 91,924
Yes, it's at least as sound.

Keep in mind that with that foam tray your subfloor must be very near perfectly level and flat. Very, very near. Those trays may not have even the required 1/4" per foot slope required by code and if the subfloor is not level you lose some of that.

With a mud floor you can compensate for any out of level or flat with the mud while making a level perimeter and the minimum or better slope. You also save a good bit of dinero.

My opinion; worth price charged.
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