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Is cement board over plywood subfloor under bathtub OK?

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26K views 5 replies 4 participants last post by  oh'mike  
#2 ·
Not sure I understand the question cole tell, but keep in mind that cement board is. Not normally considered to be "structural". So, a 3/4" plywood with 1/2" durock next gen cement board on t is considered to be 3/4" for purposes of figuring floor deflection, etc. ron
 
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