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Unread 09-06-2003, 08:56 AM   #1
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Location: Central NJ
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Thickness of wall cement board

My toilet closet sits 13" exactly from plumbing wall. I will be putting cement board and then tile on the wall. I talked to a tile technician in a tile store and he told me the average tile thick ness is about 5/16" and mortar thickness is about 1/4". Since my toilet requires 12" from finish wall I may have problem with installing it if I put standard 1/2" cement board on the wall. Is it possible to put 1/4" cement board, will it affect tile installation? I have no problem adding more studs for strength to create say 8" o.c. instead of 16" o.c. that I have now.I can also add horizontal boards between vertical studs.
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Unread 09-06-2003, 09:59 AM   #2
Sonnie Layne
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Don't worry too much, if you're down to studs at this point. You can use 1/2" green, or moisture resistant sheetrock outside the bath/shower area, then another 3/8 to 1/2 for tile and mortar. Mortar won't add more than 1/8". If you get in a bind, you can always use an offset or gooseneck adaptor for the toilet, but I'm gonna say you'll be fine.
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Unread 09-06-2003, 10:36 AM   #3
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There's no need for concrete board on the wall behind your toilet. Just use 1/2" greenboard, tile and thinset and you'll pull out the wall max 1" (assuming 3/8" std tile and 1/8" thinset). You should be fine.

I'm not a pro, just a DIY.....
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Unread 09-06-2003, 08:09 PM   #4
John Bridge
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12 in. toilets always accomodate an 11 in. setback. Have no fear, amigo.
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Unread 09-06-2003, 08:32 PM   #5
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Yes you can use greenboard behind the stool, but if you are setting tile, go with the backerboard.Its a much better substrate for Tile.Given the option i always set wall tile on concrete board or floated Mud.(cielings are an exception)
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