Hi-- I posted this in the Insulation subject, but realized it may be more suited here. Moderator: please delete my previous post. I am in Los Angeles in a house that was built in 1921. It has knob and tube and is still running electricity that way. We've had a licensed electrician come and inspect all the wires and breaker box and retrofit all the plugs to be grounded. We asked him if cellulose could be blown in over the knob and tube in the attic and he said that'd be fine because the wires are still in good shape. I called an insulation company with experience in knob and tube and they said it's fine, as well. Especially because cellulose is non-flammeable. I still have reservations, though. Despite both the electrician and insulation company saying it's safe, I'm worried. A lot of forums say to replace the knob and tube completely. Should I be? Has anyone else blown in cellulose over knob and tube? We are planning on only blowing in the cellulose in the attic, not the walls. Thank you!