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Unread 09-28-2007, 07:20 AM   #7
Shaughnn
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Join Date: Jan 2004
Location: Kent, Washin'ton
Posts: 11,467
Kevin,
That's my assumption also, that the caulked joint is the intersection between wall and tub. For aesthetic purposes, caulk is the preferred treatment because it remains flexible and won't crack. But for "function", grout is the better material for this joint. Caulk acts as a dam, and holds moisture behind it while grout is permeable and allows moisture to pass through. But grout is brittle and can crack.
Since the issue at hand is moisture retention, my advice is grout and just live with possible cracking later. It's only a cosmetic crack so there isn't much to worry about as long as it's kept clean so that mildew doesn't make a home.
Shaughnn
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