#1 Does the toilet flange screw to the sub-floor(1/4 inch hardy) or does it
sit on the ceramic tile.
#2 When you are going to tile around a spa tub is it ok to prime and seal
the green board or leave it uncoated.
There is a friendly wager on both questions Thanks
1) Screwing anything to hardyboard is oxymoronic, it won't hold unless
you screw it to something that will hold a screw, like the subfloor.
2) N/A - the backing should be cementous backer board, not green board.
#1 both. Flange should sit on the finished floor (tile) and be secured to
the sub floor. (Hardi board is not a subfloor, flange should be secured into
the wood subfloor)
#2 - priming green board is not needed but should be OK if you want.
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