House Rewiring Electrician Companies

What's Behind the Walls: Wiring by Decade

Knob-and-tube: the pre-1950 system

Ceramic knobs and tubes carrying separated conductors, designed to shed heat into open air. It worked until houses got insulation blown over it and decades of amateur splices grafted onto it. It has no ground, and most carriers now treat active knob-and-tube as a coverage problem.

Cloth-insulated and ungrounded cable: the 1940s to 1960s

Early sheathed cable with cloth or rubber insulation that dries, cracks, and crumbles at every box you open. Usually two-prong and ungrounded - the reason old houses wear adapter cubes on every outlet.

Aluminum branch wiring: 1965 to 1973

A copper-shortage substitute used on ordinary 15 and 20 amp circuits. The wire is fine; the connections are the problem - aluminum expands, contracts, and loosens at devices, which is where the fire statistics come from. It has purpose-built remediation options that are cheaper than replacement.

Why Insurers and Lenders Force the Issue

Most rewires start with a letter, not a failure. A four-point inspection finds knob-and-tube and the carrier declines to renew; an FHA appraisal flags aluminum branch circuits; a buyer's inspector writes a paragraph that kills the deal unless someone budges. Knowing which wiring you actually have - and what the honest fix is - turns that letter from an ultimatum into a scope of work. If you have not had eyes inside the boxes yet, book an electrical inspection first; it tells you whether you need remediation or replacement.

Full Rewire, Partial Rewire, or Remediation?

When pigtailing aluminum is the honest fix

Aluminum branch wiring usually does not need replacement. Approved connector systems - COPALUM crimps or AlumiConn lugs - rejoin every aluminum-to-copper connection at devices and splices. It is a fraction of a rewire's cost, and most insurers accept it with documentation.

Grounding fixes that don't open every wall

Ungrounded two-prong outlets can often be addressed with GFCI protection or a grounding conductor run to specific locations, buying safety at key outlets without whole-house surgery.

When only a full rewire settles it

Active knob-and-tube under insulation, crumbling cloth insulation, or a carrier that will not accept anything less - at that point partial fixes are money spent twice, and the full rewire is the honest quote.

How Crews Rewire a Finished, Furnished, Occupied House

The universal fear is drywall, and the professional answer is fishing: routing new cable from the attic down and the crawlspace up, using closets, chases, and stacked plumbing walls as highways. A skilled crew opens surgical access holes - behind outlets, above switches, a strip here and there - not walls. Expect patch footprints measured in hand-sizes, not sheets.

The second answer is phasing. Crews rewire room by room, keeping most of the house live at any moment. You move furniture away from walls in the active zone, live around dust containment for a few days per phase, and keep sleeping at home.

The Rewire and Remodel Combo: Open Walls Are a Discount

If a kitchen or bath remodel is anywhere on your horizon, sequence the rewire with it. Open walls delete the fishing labor that dominates rewire pricing - the same circuits that cost a fortune to fish are almost incidental when the cavity is exposed. Tell every bidder about remodel plans; it changes the strategy and the number.

Living Through a Rewire: Dust, Power, and Schedule

A typical whole-house rewire on an occupied home runs one to two weeks for an average footprint, longer for large or plaster-walled houses. Daily rhythm: the crew kills circuits in the day's zone, works, restores power by evening. Ask about dust containment, floor protection, and nightly cleanup in the bid - those answers separate crews who do occupied rewires weekly from crews who guess.

What a Complete Rewire Includes at the End

• New cable to every outlet, switch, and fixture in scope, with grounded three-prong devices throughout
• New boxes where old ones are undersized, and a written circuit map
• The panel tie-in - and if the panel itself is due, that is its own scope worth pricing in the same project
• Final inspection, permit sign-off, and the completion paperwork your insurer asked for

After the Rewire: Documentation That Pays You Back

Keep the permit record, the inspection sign-off, and the insurer letter in one folder. That stack re-rates your insurance, answers the next buyer's inspector before they ask, and turns the biggest invisible upgrade you will ever buy into provable value. When you are ready for numbers, rewire bids differ most on access assumptions - get three licensed bids and make each one state its fishing and patching plan, or start from the top-rated electricians who work occupied homes.