#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.

"Gary and Karla" wrote in message
...
#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