there's level, and then there's flat. you only need flat to tile on, it
doesn't have to be level, although it's nice if it is.

you prevent unlevel-ness by attaching boards to both sides of the room and
having a long enough straight edge that it spans the width and rides on the
boards.

it's nbd if it's a little off level. it is a bd if it is off being flat.

Also, is this what everyone refers to as Mudding?

no. mudding is laying down a thick bed of mortar and using that as a base
instead of plywood and hardibacker.


I am not concerned about the floor being completely level. It is not flat, so I guess it is a big
deal. If I lay a level across the floor, there is anywhere from 1/4 - 1/2" difference. If I lay a
tile down, it rocks back and forth. Is there a way to do this with hardibacker board or is mud my
only and easiest answer?

Tony