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Unread 04-11-2021, 12:39 PM   #7
cx
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Join Date: Jul 2001
Location: Boerne, Texas
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The nominal 3/4" plywood subfloor over 16" joist centers satisfies the minimum requirement of all known tile substrate manufacturers.

While the minimum required size of a shower is as little as 30"x30," I'd rough that shower in at no less than 36"x36." Keep in mind that while a MIL might shorten a bit with advancing age, they never get any narrower. Appropriately placed grab-bar(s) might make her more comfortable than closer walls and would certainly be safer.

While I believe the absolute minimum distance from the front of your toilet to an obstruction to be only 21," I'd opt for at least 24" were it mine.

My opinion; worth price charged.
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