The upper floors of the house were full of the old knob and tube wiring. There's really no better time to replace this old wiring than now when the walls and ceilings are not finished. So I finally hired an electrician to do the work. He was able to preserve the ceilings that I wanted to keep but still there are many holes created to run the wiring. The upside is that the house now has all modern wiring and complies with ESA code. This means fewer nightmares of the house burning.