wrote in message
My question is about the threshold. Since it will be a metal threshold
resting on concrete, I assume it will transfer an awful lot of cold
thru the metal.

No, it won't. It is physically impossible to transmit cold. You cannot
make cold either.

The cold in itself isnt a huge issue, but I also
assume it will start condensing on the warm side. What would be a good
way to try and isolate the threshold from the concrete? Can I just use
the foam strips that go between the wall sill plates and the
foundation?

Yes.

I also wanted to see the threshold to the concrete for air infiltration
reasons........I was going to use an epoxy caulk, does that sound
correct?

Or you can use a urethane adhesive.