Most Asheville homes built before 1970 have three different wiring eras running in parallel: original knob and tube in the attic and exterior walls, BX (armored cable) added during 1950s-60s renovations, and modern Romex from later updates. Each works. None of them work well together.
A whole-house rewire pulls all of it out and replaces everything with current-code grounded copper. It's a bigger job than a knob-and-tube-only rewire, but for homes with this kind of mixed lineage, it's usually cleaner than three phased projects.
Below: when whole-house makes sense vs. targeted rewiring, what 1-3 weeks on-site actually looks like, and how we minimize damage to plaster walls.