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Old 04-30-2006, 07:34 PM   #1
steve weaver
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fiberrock HELP!!!!

i am having a multible problem with this product. i contract for a retail store and they supply it and insist that i use it. i am using it on showers and somehow water is getting under the tile and making the board expand. causing the tile to lift and causing extensive water damage. i am caulking the shower and putting a pitch on the seat and curb.(that is where the damage usually occurs). WHAT DO I DO?

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Old 04-30-2006, 08:09 PM   #2
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fiberock can not be used in showers. If you are using usg product you should use their aquatough it is a 1/2 inch board. if you are nailing through the board there is a good chance that the water is getting through there.
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Old 04-30-2006, 09:03 PM   #3
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is it possible that the fiberock aquatough is wicking moisture off of the liner and working its way up?
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Old 04-30-2006, 09:15 PM   #4
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fiberock failure

is anyone having a hard time with this product getting saturated and failing?
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Old 04-30-2006, 09:20 PM   #5
Shaughnn
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Never used it on walls. Hate it on floors. What's your installation?
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Old 04-30-2006, 09:22 PM   #6
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Hi Steve, I merged your two threads together. Sorry I can't help ya, I never used the stuff.
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Old 04-30-2006, 10:43 PM   #7
Tileworks
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I've seen a piece of fiberock supposedly floating in a jar of water for months on end and it looked invincible. Could of been a gimmick, though.

Nonetheless, I use fiberock almost exclusively as an underlayment for floors. I love it. I trust it. I seem to be alone in this arena though.

When it comes to shower walls however, I still rely on good ol' wonderboard.

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Old 05-01-2006, 06:28 AM   #8
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i have a builder who insists i use 1/4" fiber rock for floors i tried to talk him into using a 1/2" board but he likes the height transition. so what i do is tell him he is responsible for a underlayment failure. i dont think will have problems any way he really builds a good subfloor and i nail the heck out of it. but i honestly think i would refuse to do walls with it. you cant put a price on your reputation.
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Old 05-01-2006, 06:52 AM   #9
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I'm not a backer board pro at all, but I know that 1/4 in. is fine for floors and countertops. Hardibacker even specs 1/4 for walls.

As to Fiberock, if you want to use a USG product, what's wrong with Durock? Or is Fiberock from GP? I've crumpled 1/4 in. Fiberock in my hands. Have to admit I've never used it.
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Old 05-01-2006, 02:19 PM   #10
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Steve, in your original post, it says "i am caulking the shower and putting a pitch on the seat and curb.(that is where the damage usually occurs). WHAT DO I DO?"
Are you using this on the seat and dam? Are you waterproofing the seat and how are you attaching this stuff to the dam?
Also "is it possible that the fiberock aquatough is wicking moisture off of the liner and working its way up?". Is this stuff on the liner or is it an inch or two off of the liner?
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Old 05-01-2006, 02:42 PM   #11
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Steve
I think that I'm thinking like romon is. there is a construction or applications problem here. Do you fabricate the benches and curb? Are all of the seams taped. Do tell us more about the curb construction.
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Old 05-03-2006, 09:06 PM   #12
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hey guys,
thank you for your help. we have solved the problem. i had a meeting with the local rep. that sold us the material and he decided that he didn't tell us that fiberock absorbs water, stays saturated, and forgot to tell us that it needed some sort of waterproofing. being that it stays wet all the way through it then soaks the studs under it and then travels to destroy the floor outside the shower. he finally determined this after looking at the fourth failed shower. if i had known more about this product i wouldn't have used it for walk boards out in the mud. i would not recommend fiberock for a dog house.

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Old 05-03-2006, 09:30 PM   #13
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Fiberock tile backer is used on surrounds, and doesn't need a membrane over it unless it's something like a bench or niche. If it is, it needs it no matter what kind of board it is.
What Fiberock did you use?
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Old 05-03-2006, 09:37 PM   #14
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fiber rock is the grey stuff right, the one that is like sheet rock but it has like fiber glass , what about perma base , it is good for shower enclouseres??
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Old 05-03-2006, 09:39 PM   #15
steve weaver
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i used 1/2" aqautough. never used the product before and won't use it again. i started contracting for a retail store recently and other subs had been using it before i got there. they didn't stick around long enough to warrant a problem. i have since given the store a choice. they either change to the kerdi system or they find a new contract setter.
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