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cement backer board underlayment attachment question
July 29, 2019
7:33 pm
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joesupulski@gmail.com
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April 19, 2015
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Generally speaking, the Code defers to manufacturer's installation instructions (MIIs) when the Code is silent on such matters.

 

Typically, cement board manufacturer's not only require cement board to be screwed to subfloor in a particular patter, but also require the cement board to be installed in a bed of mortar.

 

Check the MIIs. 

July 26, 2019
10:08 am
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Macuhail
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July 26, 2019
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Is there anything in the codes about how cement backer board should be attached to subflooring. For example the manufacturer recommends using screws every 8 inches square. Is there anything in the codes requiring this?

Thank you