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Unread 12-28-2011, 03:06 PM   #5
Longtime DIYer, Kerdi Newbie
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Join Date: Nov 2011
Location: So CA
Posts: 479
FWIW, in my jurisdiction as well as in some others in CA, greenboard is prohibited outright from ceiling usage, joist spacing be d@mned... So you might also check if your local codes allow it.
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