"Fake" exterior wall and moisture?

[Tex]

My 2nd story over hangs the first story of my house by around 11 inches. I would love to make a fake wall on the first floor that would even up the front of the house. I would then add benches under the windows. This wall would not be structural just for looks really (other than holding the windows). I am concerned about moisture between the new wall and the existing wall, should I leave the bottom open? Add vents? I am afraid if I close it up then if any moisture gets in there will not be any where for it to go.

Thanks Jeremy

[Goedjn]

You obviously have too much time on your hands.

[Tex]

And you are obviously an ass

[G Henslee]

And you are obviously talking to yourself.

[hvacthruyouguys]

And you are obviously stating the obvious.

Who's next?