Now I'm running into a bit of a planning conundrum. If you look at this picture, you can see I'm planning to insulate the basement with rigid foam including the floors. The floor will be 1" foam topped by two sheets of 1/2" ply. The problem I'm running into is the stairs. They were built with no expectation of much flooring at the bottom, just carpet pad and carpet, with carpet on the treads. If I raise the floor up two inches, the first step will be out of whack. Code is a variance of no more than 3/8". The building department says I can put a landing there to get around this (the landing would basically extend the last tread all the way to the wall. This won't be so bad if you head left after going down the stairs, but going right you'll come to the theater door, and it just seems really awkward as well as making decoupling much more of a PITA.
I'm tempted to have a contractor just build new stairs, but that seems like it's going to be expensive, and I'm hoping someone with more construction experience might be able to point to a good workaround. I really want to stick with the insulation plan, as I've been to too many basements with either mold, or hard floors, or just feeling cold.