Buffalo Rewire · Buffalo & Erie County
If your house went up between 1965 and 1973, knob and tube is not your problem. This is.
Knob and tube is not the only wiring that gets a house flagged in Erie County.
Between roughly 1965 and 1973, builders wired homes with aluminum branch circuits instead of copper. Copper prices had spiked. Aluminum was cheap, it carried current fine, and it looked like the same job when the walls closed up. Then the service calls started, and by the mid-70s the industry went back to copper.
The houses stayed.
This is the postwar ring, not the pre-war core. The ranches, split-levels, and colonials that filled in the first-ring suburbs during those years: Amherst, Cheektowaga, the Tonawandas, West Seneca, and the subdivisions like them. In the city itself it shows up in infill houses and in additions and garage circuits wired during that window.
Checking is straightforward. If the house dates to 1965-1973, look at the wire jackets in the panel and the basement. Aluminum branch wiring is marked AL or ALUMINUM on the cable sheathing. A house built in 1968 with unmarked, unverified wiring deserves the ten minutes it takes to look.
One distinction matters: the large stranded aluminum feeding your panel or your range is normal and still used today. The problem cohort is the small solid-strand aluminum running to your outlets, switches, and lights.
The wire itself, sitting in the wall, is fine. Aluminum’s problem is every place it connects to something.
Aluminum oxidizes, and the oxide layer resists current. Aluminum also expands and contracts more than copper as circuits heat and cool, so over thousands of cycles the wire loosens under the terminal screws that were tightened in 1969. Loose plus oxidized equals resistance. Resistance equals heat, right at the outlet behind the headboard or the switch by the back door.
So the failure point is not one bad run you can find and fix. It is every termination in the house, and a typical house has dozens of them: outlets, switches, fixtures, junction boxes, panel lugs. The symptoms look like small annoyances for years. Warm cover plates. A flicker. An outlet that works some days. A faint hot-plastic smell nobody can locate.
Aluminum branch wiring carries its own insurance flags, separate from knob and tube, and inspectors call it out by name the same way. Carrier responses vary more than they do with knob and tube. Some decline. Some surcharge. Most want documented remediation by a licensed electrician before they will write or renew cleanly. The mechanics of letters, deadlines, and proof are the same game we describe in our insurance guide, so we will not re-explain them here.
The emotional part deserves a sentence, because we hear it on assessments. You did everything right. You skipped the hundred-year-old house on purpose, bought a solid 1968 ranch with a dry basement, and the letter still came. Different decade, different failure, same envelope.
Honest bottom line: connector remediation done right costs a fraction of a rewire and solves the actual failure mode. Full replacement costs more and ends the conversation forever. Which one makes sense depends on the house, the panel, and how long you are staying. That is exactly what a written assessment is for.
Different decade, different metal, same rule. Fix the terminations or replace the wire.
Send us your insurance letter or inspection report. We’ll tell you what it actually requires, free.
Request a written rewiring assessment. We respond within one business day.