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Unread 12-03-2019, 04:31 PM   #2
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Join Date: May 2017
Location: Milwaukee WI area
Posts: 1,061
it may be the nature of the beast with marble. This issue comes up time and time again. One of the reasons why real marble is frowned upon, despite it being in all the instigramz.

I would not blame your grout. Grout and tile, ESPECIALLY marble, are NOT waterproof. If anything, marble is very absorbent. Your preslope or final slope MAY have a puddling spot in it exacerbating the issue.
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