Connecticut has some of the oldest housing stock in the country, which is lovely to look at and occasionally alarming behind the plaster. Not every old wiring system is dangerous, and not every dangerous-looking thing needs a full rewire. Here is how to tell what you have.
Identifying what is in your walls
Knob and tube (roughly pre-1950)
Individual conductors running through porcelain tubes where they pass through joists, supported by porcelain knobs. Visible in attics and basements. No ground conductor. The insulation becomes brittle with age, and the system was designed to shed heat into open air — so anywhere it has been buried under later blown-in insulation is a genuine concern.
Cloth and rubber insulated cable (roughly 1930s–1960s)
Early sheathed cable with fabric or rubber insulation. It degrades from the inside and often crumbles at the point where it enters a box, which is exactly where it matters. Frequently ungrounded.
Aluminium branch wiring (roughly 1965–1975)
Silver-coloured conductors rather than copper. Aluminium expands and contracts more than copper under heat cycling, so terminations loosen over time and loose terminations generate heat. Notably, the answer here is often not a full rewire.
Symptoms worth taking seriously
- Two-prong outlets throughout, meaning ungrounded circuits
- Warm outlet or switch plates, or discoloured devices
- A persistent faint smell of hot plastic in one room
- Breakers or fuses that trip or blow with no obvious pattern
- Lights that dim when a large appliance starts
- Anything spliced outside a box, or boxes with no cover
- Extension leads as permanent infrastructure — a capacity symptom
The insurance reality
Existing knob and tube is generally permitted to remain if undisturbed and in sound condition. That is a legal position, not an insurance one. A growing number of insurers in Connecticut will decline, surcharge or require remediation on houses with live knob and tube, and home inspection reports flag it every time. Plenty of rewires start with a letter from an underwriter rather than a fault.
Aluminium wiring: pigtailing versus rewiring
Where aluminium is confined to branch circuits and the terminations are accessible, an approved correction using the correct connectors at every device is a recognised remedy and costs a fraction of a rewire. Full replacement earns its cost when connections have already overheated, when walls are open for other work, or when the panel and service are due anyway. Any electrician who leads with full rewire without inspecting the terminations is selling rather than diagnosing.
If you are buying an older Connecticut home, get an electrical inspection before closing rather than relying on the general home inspection paragraph. See whole house rewiring for how we survey and stage this work.
Rewiring is the moment to fix everything else
While runs are open, additional circuits cost a fraction of retrofitting them later. This is the point to add the dedicated kitchen appliance circuits, the outlets you currently reach with extension leads, hardwired interconnected smoke detectors, data cabling, and a 240V run for a future EV charger or heat pump. Skipping that list is the most common regret we hear a year after a rewire.
Rewiring in stages: how it actually gets scheduled
Almost nobody rewires a house in one continuous run while living in it, and they should not. The workable pattern is zone by zone: isolate an area, run new circuits, terminate, test, make good, then move on. That keeps working power and lighting available everywhere except the current zone, and it lets you spread the cost across two or three phases if you would rather not do it all at once.
A sensible order is usually the highest-risk area first — often the attic or the kitchen — then bedrooms, then living space, then outbuildings. If a panel upgrade is also needed it goes first, because every new circuit terminates there and doing it afterwards means re-terminating everything twice.
What it costs you beyond the invoice
- Access. Furniture moved away from walls, some rooms unusable for a day or two at a time.
- Making good. Patching is included in a proper quote, but painting usually is not. Budget for a decorator afterwards.
- Time at home. Someone needs to let crews in, though not necessarily every day of a phased job.
- Decisions. Every room needs an outlet and switch plan. This is the fun part, but it is not zero effort.
The questions to ask any rewiring quote
- Is the panel included, or quoted separately?
- Is making good included, and to what standard — patched, taped, ready for paint?
- Is the permit and inspection inside the price?
- How many circuits, and what is the room-by-room outlet plan?
- Are hardwired interconnected smoke and CO detectors included?
- Will you run data cable and a 240V garage circuit while walls are open, and what does that add?
- How is the work phased, and what is uninhabitable at each stage?
A quote that answers all seven clearly is comparable with another quote that does the same. A quote that answers three of them is not cheaper — it is less complete, and the gap arrives later as change orders.