What do you think? House attic has Knob and Tube, there is old flat batts of Rock Wool beneath it about 1 1/2" thick, 2X6 joists, the joists have boards covering them,(mostly nailed down) then some one covered all the boards with unfaced 4" batts of fiberglass insulation. Does this qualify for the Knob and Tube being covered with insulation?
Thanks, Steve