I have a toilet in a downstairs powder room that was leaking. Had three different plumbers come out each gave me different opinions and the toilet is still not installed properly!

The toilet sits on a post tension slab cement floor. There was a repair flange installed by the previous owners. The last plumber who was here indicated there was no problem with the repair flange, installed the wax ring, told me to put caulking around the bottom of the toilet and it would be fine. Well it turns out he had put some very thick rubber spacers under the front of the toilet to make the back flush with the repair flange. The toilet is still rocking. My questions is: what is the best material to use to level the toilet all the way around (so there is not a 1/2 gap in the front only) so I do not have to completely hear it out and start busting up concrete?

Is the floor that much out of level, the flange sitting up too high or the base of the toilet warped?

The repair flange sits up too high because the builders didn't cut out the concrete to correctly install and a plumber wand $$ to chisel it out.



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Do you have any pictures available of the current flange? Why was a repair flange installed? Is it just a flange ring or whole flange assembly?