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Unread 06-07-2007, 05:13 PM   #13
Veteran DIYer- Schluterville Graduate

STAR Senior Contributor

Join Date: Jul 2004
Location: Nashua, NH
Posts: 14,061
Don't worry about the nail holes in the vapor barrier. You should never get liquid water is a vapor barrier, and you won't get any appreciable vapor through a nail hole to do anything; especially sandwiched between the cbu and the stud.

1/4" is fine, 1/2" might work, too, depends on the size of the tile...1/4" is probably better.

If you tub really is installed level, start at the tub if you problem. It is supposed to be level, so that's okay. Thenk you can use spacers to keep it off of the nice flat hard tub lip to hold the rest of them up without the ledger.
Jim DeBruycker
Not a pro, multiple Schluter Workshops (Schluterville and 2013 and 2014 at Schluter Headquarters), Mapei Training 2014, Laticrete Workshop 2014, Custom Building Products Workshop 2015, and Longtime Forum Participant.
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