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Unread 06-12-2022, 05:04 PM   #2
Kman
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Join Date: Nov 2006
Location: NW Arkansas, Ozark Mountains
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Lou, that's why a lot of installers elect to make their own inside corners. It's easy enough to do with a 4" square piece of Kerdi band. Cut from the middle of one side to the middle of the square, and overlap the two pieces.

So there will be a small hole at the center, which probably wouldn't let any water through if you overlap the pieces enough. But just to be safe, I'd put a dab of silicone in that corner.

But I don't know of any reason that you couldn't bury the wall board in the mud floor, as long as the manufacturer of the board condones it.
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