Problem: We recently removed several decades of tile (one layer was 1/2 inch thick terracotta) in our bathroom, right down to the (heavily damaged) terrazzo original floor of this 1956 home. We then tiled with rectified porcelain tile, which looks great, but... now the toilet 'rocks' a bit. The floor level is too low. My husband tucked a few pieces of cardboard under the foot of the toilet and that works great but I am assuming it is not a permanent solution. I read some forums and found these solutions: 1. lay a marble slab (which we happen to have) as a sort of 'pedestal to the pedestal'. The problem is, our new dual flush chair height toilet will be ridiculously high, especially for little grandchildren... :). 2. get a plumber to cut the metal pipe lower (costs $$$).

Question: Is there something we can buy at HD or Lowe's, to raise the toilet 3/16 inch? I am picturing an 'outline' of the foot of the toilet that we could put under the toilet, later caulk in, and... no rocking! OR, should we put another few tiles under the toilet (cut to follow the outline of the toilet foot) and caulk that in? We have lots of tiles hanging around (we are big on C List). Thank you for any suggestions!

You do have options here.
1- You can shim the bowl and caulk the base in as you stated, **or**
2- If it were my call I'd Take a block of wood and hammer and tap the cast iron flange level with the floor, You may then grind, Cut or nibble off the cast iron pipe with a adjustable wrench. The flange must be recaulked with caulking irons after this is done. You may now install your toilet in the regular way. Good luck, Tom

Thanks for your quick response! Husband hammering away as we speak. Appreciate your expert advice in this and other posts. Alicia

Please let us know how you make out. Remember. Hag down the flange will loosen the lead joint. While you won't have to do the lead and oakum over you will have to recaulk the joint using inside and outside caulking irons,(see image) that you may either purchase or rent, Good luck, Tom