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Old 09-06-2012, 11:40 PM   #1
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Issues with hardibacker and cultured stone


I installed cultured stone around a fireplace. I used regular mortar and applied directly to the backerboard without a scratch coat. Needless to say, the stone comes off the backerboard easily and cleanly leaving all the mortar still attached to the stone and a clean backerboard surface. after further reading, I see many suggestions to use thinset on th ebackerboard and mortar on the stone. Well, I am short on supplies and am wondering if I can use the stone that came off cleanly and just apply thinset or more mortar to th eback of the stone that already has dried mortar on it. I would creat a scratch coat on the backerboard with thinset before doing anything else.

What do you think ?



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Old 09-07-2012, 07:34 PM   #2
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Issues with hardibacker and cultured stone

Are you talking about removing all of the stone & thinsetting them back on?

How thick is the hard mortar on the back of the stone?

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Old 09-08-2012, 03:57 PM   #3
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Issues with hardibacker and cultured stone

The stone is installed improperly and it will all remove itself in a short time. Just as well take it all down and start over.

Next time use modified thinset or a wire/metal lath and scratch-coat method using the proper mortar.
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