Toilet flange help???

[jasonmcl]

Should the toilet flange sit on top of the cermaic tile or on top of the backerboard? If I raise the flange too high I am afraid that I might not have to much more than an inch to glue. What do you guys think?

[jadnashua]

Ideally, the flange sits on top of the finished flooring. You'll be okay if it is solid on the cbu. If you can cut out the pipe from below and add a new piece, it would be better. My unprofessional opinion.