Hi and sorry in advance if this is a repeat question.

We are renovating a Cape Cod style cabin in upstate NY with the bedrooms located on the lofted second floor.  The previous owner had run the ceilings to the ridge and installed foil-faced insulation that filled the rafter bays, which left us with some moldy spots in the drywall and some dry rot in the roof deck.

We took down the ceiling, pulled out the insulation, and had the roof replaced this past summer and are currently working to close up the ceiling in hopes of cutting down on the heating bills.

To date, we’ve furred down the rafters (2×6 + 2×4 furring for 9” total depth) installed baffles in each bay, and installed 8”thick Kraft faced HD insulation.

We are planning to install salvaged 1×6 tongue and groove paneling on the ceiling.

I know we need an air barrier at the bottom of the rafters but I have a few questions:

1. Is faced insulation board with foil tape at the seams a suitable air barrier? If so, which way should the reflective foil face?

2. Can we install wood panel directly over the insulation board?

3. If the answer to 1 or 2 is “No,” is there value to installing housewrap inside out (i.e. trapping air inside the house) or air barrier (e.g. Membrain) between the insulation and the drywall?

Thanks for any help