[fsstnotch]

Ok, last December I bought a new house(new to me). Well, so far it has been great except one thing. It was built around 1900 so it has some serious insulation issues! I have put $2k in propane into the house since Early Jan. Well, when I get home I was planning to insulate the exterior walls using the blow in type and also add a bunch to the attic.

Ok, now my question. When we had our home inspection, the inspector said it looked like the whole house had been rewired with updated wiring except one room on the second floor which still had knob and tube present. My understanding is that knob and tube gets really hot and could cause a fire if it were to have insulation put on it. Is there a way to determine if knob and tube is present and in use without ripping all the walls out of the house?