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Unread 01-17-2005, 10:10 AM   #1
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Cement backer board and shower curb

Can cement backer board be applied directly to a cement shower curb using thinset to give a nice level curb in which to apply ceramic tile? I know that it cannot be nailed due to the shower membrane beneath the cement.
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Unread 01-17-2005, 02:18 PM   #2
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Dont think so. CBU needs to be screwed in place.

Why isn't the curb cement smooth?

You may be able to smooth it by applying a thin layer of thinset.

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Unread 01-17-2005, 07:19 PM   #3
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Hi Zippy, Welcome aboard.

You'll need to level out your curb with some sort of cement product, either thin set or more mortar. Backer board does need to be screwed or nailed.
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