Hello all, We are converting our porch into the living room and need to know how to properly insulate so we can only do it once. Details are: vaulted, 6" below other half of roof, shingled, under lament, and 2x6 and we want to use Bead board on the under side and keep the vaulted look. The only thing i can think of is too use 1/2" Styrofoam and then faced insulation to fill the void and then the bead board (Wainscoting), with eaves closed in with vented soffit, or do we need to use baffles between the joists? Much help is appreciated!! Northern Virginia area if someone is local that can help! Thanks a ton This Old House folks!