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Cement backer board installed on plywood wall?

Cement backer board installed on plywood wall?

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  #1  
Old 02-22-16, 09:34 AM
T
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Cement backer board installed on plywood wall?

Hello everyone,

I have a question that I can't seem to find anywhere on the internet. I am installing a new shower in my bathroom and planning to tile. However, after tearing out the old shower I have found all my walls are lined with plywood. Can I install hardiebacker or equivalent directly on this plywood?

Thank you,

Trevor

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Old 02-22-16, 09:43 AM
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Looks like OSB to me. Any idea how thick it is and what's behind it?
 
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Old 02-22-16, 10:36 AM
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The tile guys will get with you on tile prep, my concern is structural. The sheathing might be there for a reason.
Large, tall walls are often covered with sheathing and drywall to provide lateral strength.
If you have a situation like this, I wouldn't cut out the sheathing.
An example would be a 2-story house with narrower walls than usual.
 
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Old 02-23-16, 04:40 PM
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Put some kind of moisture barrier behind the backer board. The tile guys will tell you what is best.
 
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Old 02-23-16, 07:12 PM
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Yes, install your backerboard on the plywood is fine. Is that an electrical outlet in the shower?

What type of base or shower pan are you planning?
 
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