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Unread 05-25-2021, 11:53 PM   #5
Kman
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Join Date: Nov 2006
Location: NW Arkansas, Ozark Mountains
Posts: 11,970
With mortar between two almost-impervious surfaces, I'd wait a couple of days. If you need to walk across a traffic area, lay a sheet of plywood over it the next day to walk on. (At $60-70 a sheet, I'd not wear shoes when walking on it, and I'd return it soon after. )

The larger the tile, the longer the drying time.

And if you happen to be using a light-colored grout, you'll want to use white mortar instead of gray.
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