A huge share of Montgomery County’s housing went up during the post-war boom — the split-levels off Veirs Mill Road, the colonials in Wheaton and Kensington, the ramblers around Aspen Hill — and a lot of the homes built between roughly 1965 and 1973 left the factory with solid aluminum branch-circuit wiring. David Williams Electric has spent more than 30 years opening up those panels and outlets, and we remediate that wiring the way it should be done: copper pig-tails joined with UL-listed ALUMACONN connectors at every device. Maryland license #11734, a flat price you see before we start, and a 100% satisfaction guarantee on the work.
Why so many Montgomery County homes have aluminum branch wiring
It comes down to when the county grew. During the late-1960s building rush, copper prices spiked and builders across the DC suburbs switched to solid aluminum for 15- and 20-amp branch circuits — the runs that feed your outlets, switches, and light fixtures. If your home in Rockville, Gaithersburg, Olney, or the older sections of Silver Spring was framed between about 1965 and 1973, there’s a real chance it’s behind your walls.
Aluminum itself isn’t the problem; the connections are. Aluminum expands and contracts more than copper as circuits heat and cool, and over fifty-plus years that movement loosens terminations under standard receptacle and switch screws. A loose connection arcs, and an arc behind a wall is where house fires start. We’re not here to scare you out of a home you love — plenty of Bethesda and Potomac houses have run on aluminum for decades without incident — but it’s the kind of thing you fix on your schedule, not the insurance company’s.
How we actually fix it — pig-tailing with ALUMACONN
The repair is methodical, not glamorous. At every device — every outlet, switch, and fixture connection on an aluminum circuit — we add a short length of copper “pig-tail” and bond it to the existing aluminum conductor inside a UL-listed ALUMACONN connector. The device then lands on copper, the way it was designed to, and the aluminum-to-copper junction is made with a connector listed specifically for that purpose and torqued to spec.
That means pulling and resetting devices throughout the house, so we work room by room and keep the disruption contained — important in an occupied Kensington colonial or a finished Germantown basement. We don’t “upgrade” a couple of obvious outlets and call it done; the value of pig-tailing is doing every termination on the affected circuits, because the one you skip is the one that fails.
Permits, inspections, and the local reality
Electrical work in Montgomery County runs through the Department of Permitting Services in Rockville, and a remediation of this scope is permitted and inspected work — which is exactly what you want on a job that touches your home’s fire safety. We pull the permit, schedule the county inspection, and make sure the work passes, so you have a paper trail if you ever sell or refinance. That documentation matters here: aluminum branch wiring is one of the first things a Montgomery County home inspector flags, and a buyer’s agent in Potomac or Chevy Chase will absolutely ask whether it’s been professionally remediated.
It also matters for insurance. Several carriers writing policies in this market won’t bind, or will surcharge, a home with un-remediated aluminum branch wiring. A permitted pig-tail remediation with the inspection on file is usually what turns that conversation around.
What it costs and what you can count on
Aluminum jobs scale with the size of the home and how many circuits and devices are actually on aluminum, so we walk the house, count the devices, and give you a flat, written price before any tools come out — no hourly meter running, no “we found more once we were in there” surprises at the end. You’ll know the number for your specific home in Bethesda or Damascus, not a vague range off a website.
Every aluminum remediation we do is backed by our 100% satisfaction guarantee and performed under Maryland master electrician license #11734. After 30-plus years wiring and rewiring homes all over Montgomery County, this is bread-and-butter work for us — done with the listed connectors, permitted, inspected, and built to outlast the next owner.
Frequently Asked Questions
How do I know if my Montgomery County home has aluminum wiring?
The strongest tip-off is the build date — homes framed between roughly 1965 and 1973 are the prime suspects, which covers a lot of Rockville, Aspen Hill, Wheaton, and older Silver Spring and Gaithersburg neighborhoods. You can sometimes see "AL" or "ALUMINUM" printed on the cable jacket at the panel, but the only reliable check is having a licensed electrician pull a few devices and look at the conductors. We'll confirm it during the visit before quoting anything.
Do you replace all the aluminum wiring or just repair the connections?
For branch-circuit aluminum, full rewiring is rarely necessary and is hugely invasive — it means opening walls and ceilings throughout the house. The accepted, far less disruptive fix is pig-tailing: we bond a copper pig-tail to the aluminum at every device using UL-listed ALUMACONN connectors, so each outlet, switch, and fixture lands on copper. We only recommend rewiring when there's separate damage that calls for it.
Is this work permitted and inspected?
Yes. We pull the electrical permit through Montgomery County's Department of Permitting Services in Rockville and schedule the county inspection so the remediation is signed off on the record. That documented, passed inspection is what you'll want on hand for home sales, refinancing, and your insurance carrier.
Will fixing the aluminum wiring help with my homeowner's insurance?
Often, yes. A number of carriers in the Montgomery County market either decline or surcharge homes with un-remediated aluminum branch wiring. A professionally pig-tailed remediation — done with listed connectors and a permit/inspection on file — is usually what an insurer is looking for. We give you the paperwork to send them.
How much disruption should I expect in an occupied home?
We work circuit by circuit and room by room, so most of the house stays usable while we're there. Power is only off in the area we're actively working. In a finished space — a basement in Germantown, a renovated kitchen in Bethesda — we plan the sequence with you up front so you know which rooms are affected each day.
Serving Montgomery County
David Williams Electric provides aluminum wire remediation throughout Montgomery County, including Rockville, Bethesda, Silver Spring, Gaithersburg, Germantown, Potomac, Olney. Explore all Montgomery County electrical services or learn more about aluminum wire remediation across Maryland. Call (410) 781-4357 for a free, up-front quote.
