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Unread 03-15-2020, 11:39 AM   #1
Residential Remodeling GC
Join Date: Jun 2016
Location: SF Bay Area
Posts: 45
Hardi Not Adhering to Floor

I installed about 70 sq ft of 1/4" hardi on a bathroom floor as I have done on countless other jobs. Custom's VersaBond troweled over the 3/4" ply subfloor and screwed down all per manufacturer instructions. About a week after the hardi went down we started to notice in a couple of spots the Hardi had actually unbonded from the subfloor! Has anyone seen this before? Did I just get a super dry batch of Hardi and it sucked all the moisture out of the thinset?

I've honestly never had this happen over many years of the exact same installation method.
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