Homeowners usually come to this for one of three reasons. The house is old enough that the original wiring is past its useful life. Something damaged a section of wiring, like a renovation, rodents, water or a storm. Or the house simply doesn't have enough circuits for how people live now.
Repairing a run vs. rewiring the house
Electrical wiring repair is targeted. A cable nicked by a nail, a splice buried in a wall without a box, or a run chewed by squirrels in the attic can often be fixed by replacing that segment and putting the connections in accessible junction boxes. The rest of the circuit stays as it is.
House rewiring is a planned project. New cable is pulled to outlets, switches and fixtures, often fished through existing wall cavities to limit drywall damage. It's a good time to add circuits for the kitchen and bathrooms, bring grounding up to date and install AFCI and GFCI protection where the code calls for it. Some homeowners do it room by room over several years.
When rewiring is worth doing
- The house still has ungrounded two-prong outlets throughout.
- An inspection found cloth-insulated wiring, knob and tube, or aluminum branch circuits.
- Walls are already open for a remodel, so access is easy.
- Rodent, water or fire damage affected a section of cable.
- Rooms don't have enough outlets and extension cords have become permanent.
Symptoms that point to a wiring problem
- Outlets or switch plates that feel warm.
- Lights that flicker on one circuit even with new bulbs.
- Brittle, cracked insulation visible in the attic or basement.
- A faint burning smell with no obvious source.
- Breakers that trip on a circuit with light loads.
Planning a rewire without gutting the house
Most rewires start with the electrician mapping every circuit and testing insulation, then drawing up a plan: which runs get replaced, what new circuits get added and where openings are needed. Experienced electricians fish cable through attics, crawlspaces and existing wall cavities so drywall patches stay small. Work is usually done in sections so parts of the house keep power, and a rough-in inspection happens before walls are closed. A drywall finisher may follow for patches.
- Insulation condition of existing conductors
- Grounding path at each outlet
- Wire gauge matched to breaker size on every circuit
- Junction boxes, splices and any buried connections
- Circuit loading in kitchens, bathrooms and laundry areas
Safety first. Warm outlets, flickering and burning smells are not things to wait out. Stop using the affected outlet or circuit and switch off its breaker if you can do so safely. Don't open walls or pull on wiring to hunt for the problem. In attics and crawlspaces, avoid disturbing cables, especially where insulation looks brittle, and never step on wiring runs.
How it usually works
Call to start
Call to connect with a local electrician and share the home's age, any symptoms and whether a remodel is planned.
Circuit survey
The electrician tests and maps the existing wiring and recommends repairs or a phased rewiring plan.
Rough-in and inspection
New cable is pulled and connections made, and the work is inspected before walls are closed.
Finish and test
Devices go in, every circuit is tested and labeled, and patching is completed.
In Murfreesboro and Middle Tennessee homes
Murfreesboro's growth has produced two very different wiring stories. Older homes near the square can have original wiring that has been extended and patched for decades. Newer houses usually have modern cable, but repairs come up after renovations, storm damage or pests in attics. Across Middle Tennessee, summer attic heat is hard on older insulation, which is one more reason to look at attic runs during an electrical inspection. The guide to rewiring warning signs covers what to watch for.
Related electrical problems
Seeing one of these at home? Each guide explains likely causes and what's safe to check before you call about wiring & rewiring.