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Unread 10-15-2009, 11:43 AM   #1
kevinhall
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Kerdi on hardibacker on studs, no dryall??

Gents,
I'm doing a custom showerpan in a narrow space. In the interest of having an extra inch of width, I'm planning to NOT put in drywall, but simply affixing hardibacker(or similar/better preferred) directly on the studs, then the Kerdi shower membrane, over which the tiles go. Any opinions on such a plan? My studs are beefed up w/cross bracing and I figure between the backerboard, Kerdi, thinset and tiles it "should" be adequate. I would greatly appreiciate your comments, criticism, reccomendations, alternatives, bring it! Thanks in advance for your consideration.
Kevin
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Last edited by kevinhall; 10-15-2009 at 11:44 AM. Reason: Drywall in subject line mis spelled
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Unread 10-15-2009, 11:50 AM   #2
jgleason
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If it were me I would just skip the backer board entirely. Install 1/2" regular drywall and then Kerdi it. Perfectly acceptable method according to Schluter. It is also how I did my shower five years ago. No leaks, no problems at all.

If you really insist on the backer board then installing it directly to the studs is fine, just make sure all joints are supported by a stud or blocking. Make sure you thoroughly dampen the backer board and then install the Kerdi.
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Unread 10-15-2009, 02:08 PM   #3
ddmoit
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Welcome to the forum, Kevin.

What Joe said.

I don't understand how the Hardiebacker is supposed to get you an extra inch.
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Unread 10-15-2009, 02:43 PM   #4
cx
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Welcome, Kevin.

What Dan said.

My opinion; worth price charged.

Dan, I think his savings was over having both sheetrock and CBU vs. just the CBU.
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Unread 10-15-2009, 02:44 PM   #5
jgleason
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Pretty sure he was planning on 1/2" drywall and then Hardie laid on top of that. Remove the drywall and you save an inch (1/2" each side)

Still better off skipping the Hardie and just using the drywall and Kerdi.
Quote:
Originally Posted by ddmoit

I don't understand how the Hardiebacker is supposed to get you an extra inch.

Last edited by jgleason; 10-15-2009 at 02:44 PM. Reason: typo
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Unread 10-19-2009, 03:13 PM   #6
kevinhall
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Smile Kerdi on hardibacker, no drywall

Thanks you guys for your responses,
Drywall only it is.....Yeah, that extra inch, I thought, is in reality only a 1/2 inch, (my bad on the math) if using 1/4" backerboard directly on the studs, but I see your point about just drywalling it and applying the Kerdi on that. Why mess with the backerboard, its a pain to cut, to only gain a whopping half inch extra. Not worth the headache. I did a similar project back in the day, and I'm looking forward to doing this the new school way.
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Kevin
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Unread 10-19-2009, 05:03 PM   #7
Edthedawg
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Ya wouldna want 1/4" on the walls anyways. Don't care what Mr Hardie says 'bout that
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