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Old 04-23-2006, 02:51 PM   #1
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USG Fiberboard vs. Hardi Backer Board

I want to install tile into my kitchen and plan to install an underlayment on top of 19/32" and 15/32" base of plywood. I have read other threads about the CBI but am still unclear which way to go. I have a choice between USG's Fiberock brand product and Hardi's Backerboard. I believe one is a cement based product (Hardi) and the other is a fiberglassed based product. The Hardi product is about 30% more expensive and a bit more difficult to work with. Is there a real difference in the performance in the products? Which would you recommend?
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Old 04-23-2006, 03:58 PM   #2
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Hi Martin, glad to have you onboard.

USG's Fiberock Aqua-Tough Underlayment has come up a few times in the past but not much in the way of actual experience has been posted here. I personally have none. Do a search on Aqua-Tough and read through the 6 threads mentioning this product, then decide.

In the meantime maybe someone will come by with actual experience using this gypsum based product under floor tile.

Have you considered Ditra coming in a 1/8" thick? http://www.schluter.com/english/prod...601-index.html Ditra is what I would use and have used throughout my own house even, floors and countertops.
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Old 04-23-2006, 04:27 PM   #3
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Welcome aboard, B. Please give us a first name.

I'm not experienced, either, but intuition tells me to go with the cement based product and not the gypsum product given the choice.

I'm am experienced with Ditra. It's the best of all.
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Old 04-23-2006, 06:23 PM   #4
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Thanks for the feedback. I have considered using Ditra (per the many posts on this site). Because I have used the cement board in the past, I was going to go with a product that I was farmiliar in using.

As for Ditra, I like the height savings and flexibility of laying it down but didn't feel comfortable in using it on a project yet (350 Sq ft for the Kitchen). Another concern I have is the general availability of the product in case I come up short and can't drive to the local hardware store to pick up a few additional feet or the fact that I have to buy it in full rolls (somewhat of a cost issue if I only might only need an extra 10 Sq ft.).

Thanks - Brian
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Old 04-23-2006, 06:42 PM   #5
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The TYW store has a merchant that will sell you just what you need. Keep in mind the width, and the shape of your room to order enough, you might need more than the square footage listed to avoid patching (which is okay) cutoffs to fill in everywhere.
Jim DeBruycker
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Old 05-06-2006, 10:20 AM   #6
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I have used both products and I will be honest, I only but Fiberock because i thought I was getting hardibacker for less. I was real upset when I dropped a corner and the board snapped in half. Fiberock is basically like working with greenboard or drywall.

Like the previous writer said, go with the cement board. Gypsum disolves in water.
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Old 10-06-2006, 10:47 AM   #7
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I have used Fiberock for the last two years. I have now had 3 jobs fail, cracking, tile pops, moisture issues in the last year from the jobs I did last year. I saved a few $$'s now I have spent that in more in repairs. No more Fiberock for me.
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