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Old 02-23-2003, 07:26 PM   #1
prowak
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hardibacker vs. cement board

Hi,

I've got a quote for the installation of some procelain and marble floor tiles. The contractor has indicated he only uses hardibacker. I'm more familiar with the use of cement board.

Is one preferred over the other?

TIA,
Dave
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Old 02-23-2003, 07:34 PM   #2
Jason_Butler
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Hardibacker is a CBU . The hardibacker does not have the fiberglass mesh that is found in some of the others but they serve the same purpose.

I use the Hardibacker CBU routinely with no problems.

You should have no problems with the Hardibacker your contractor is using as long as it is installed per Mfgr instructions.

make sure thinset is used between the CBU and the subfloor , nails are placed per spec, and the joints are taped and mudded.

Jason
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Old 02-23-2003, 07:52 PM   #3
prowak
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Jason,

Thanks for the reply.

What's CBU?

Dave
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Old 02-23-2003, 08:16 PM   #4
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I'd also make sure the plywood underneath the Hardibacker is well screwed down, especially at the seams, so there's as little movement as possible in it.

Hardibacker is a fiber cement board.

CBU = Concrete Backer[board] Underlayment
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Old 02-24-2003, 05:14 PM   #5
John Bridge
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Welcome aboard, Dave.

CBU = cement backer unit, including Hardi and the rest. I would allow the contractor to use the board he's comfortable with.
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