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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...

Hi-- I am in a house that was built in 1921. It has knob and tube and is still running electricity that way. We've had an experienced 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...