After reading some of the questions and answers on this site I now know that I probably should have put down the foam barrier beneath the bottom sill plate on my new basement wall that I have started building to finish my basement. It is a walk out basement that is heated already. I have built about 30 ft of wall already. The bottom plate is treated. How much trouble will I be in down the road if I leave it like it is? I have had no problem with moisture at all. Thanks very much.

There were millions of trouble-free houses built without sill seal before it was invented. Don't be worryin'...

With no real moisture problem, the treated seal will be plenty. The whole purpose of the the mso is for contact with concrete, carry on.

The purpose of sill seal is to seal the foundation and sill plate from air leakage.

As long as you seal the foundation and sill plate joint with caulk or some type of foaam sealant as most energy codes require, you have met the intent of the code and duplicated the purpose of sill seal.