Basement insulation and vapor barrier
We're now finishing our basement and we're going to install insulation (Roxul Flexibatt) to the floor. But we already finished the framing before fully looking into the moisture barrier and vapor barrier requirements (doh!). So here's the situation: we've got the studs out at least 1" from the foundation wall (more than that in most places), with a layer of 6 mil poly attached between the framing and the pink insulation. Is this okay, or do we need to do something about the lack of moisture barrier behind the existing insulation? The poly that we added goes up to the top plate...is that too far up?
Also, we've got a wall between the main area of the basement and the furnace area. We're using 2x6's for that wall, and we'll put Roxul Safe 'n' Sound for insulation there. Do we also need vapor barriers on either of the sides of that wall?