Thinset on Durock


Old 06-22-05, 10:55 AM
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Thinset on Durock

The manufacturer of Durock says to use the rough side when using thinset, but I put it up with the smooth side out because I was told mastic was easier to apply. But after reading about both ways, it seems as though thinset is a better solution in a shower situation. So the question is can I use thinset on the smooth side of the Durock? Am I asking for trouble?

Last edited by Lee4; 06-22-05 at 10:56 AM. Reason: typo
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Old 06-22-05, 06:20 PM
Join Date: Aug 2000
Location: USA
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You should be fine according to another post I read where someone did this. Make sure you use the thinset and not mastic in the shower. Hopefully, you installed a polypropylene vapor retarder beneath the concrete underlayment board.
Old 06-23-05, 04:10 AM
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I put roofing paper down under the cement board. Probably not as good as polypro, but will it do? Should I be putting Redguard over the cement board before I tile?

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