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Tenchi 11-21-2010 05:02 PM

question about cement board
i am redoing my bath/shower, i am about to put up the hardy board in the shower and i have a question... which side goes out? the smooth or rough?i am putting marble tile on it after.


1910NE 11-21-2010 07:23 PM

check the label. it should tell you which side faces out, depending on the application.

troubleseeker 11-21-2010 10:13 PM

The rough side is used for thinset applications, which you should be using for a wet area. The smooth side is used for mastic, which you should not be using in a wet application.

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