What is the best way to insulate the exterior of a post and beam timber frame HOME with rigid insulation?
...Barn. Planning to insulate on the exterior with no interior insulation as I wish to keep the bones of the barn exposed internally. Wall currently has 3/4" Shiplap pine sheathing over the Girts. Looking at emplacing 4" R20 Rigid XPS Panels seam taped. Those would be strapped to the wall with 7 1/2" screws into the Gi...