So I have tiled a few times and read the requirements for Hardie Backer underlayment and followed those very carefully.
I happen to be at a draw inspection the other day and noticed that the contractor was using roofing nails to secure the hardie backer in 2 upstairs bathrooms. I question him (not part of a draw inspection) and he told me that it was his way of doing it and that its OK.
I say BS.
Do any of you know any instructions that say that it is ok to install the hardie backer that way?