9 December, 2025
Hi-Lite Electric Inc.
If you’re renovating an older home or upgrading your electrical system, one key decision can impact your home’s safety and long-term costs: aluminum or copper wiring? The debate between these two materials has been going on for decades, and it’s more than just a question of price. Each comes with its own advantages, risks, and maintenance needs. Knowing the differences can help you make a smart, informed choice.
At Hi-Lite Electric, we’ve worked with all types of residential wiring. Here’s what homeowners need to know about aluminum and copper wiring before making a decision.
Aluminum electrical wiring in houses gained popularity in the 1960s and 1970s. At the time, copper prices had soared, and aluminum offered a more affordable and readily available alternative. Builders and electricians turned to it as a cost-cutting solution, particularly in mass residential developments.
However, problems soon followed. It became clear that aluminum wiring in homes behaved differently from copper. Over time, it was found to be more prone to overheating, loosening at connections, and even sparking fires if not installed correctly. These issues weren’t always due to the aluminum itself, but rather the methods and materials used during installation.
One of the biggest differences between copper versus aluminum wiring is conductivity. Copper is a better conductor of electricity, which means it delivers power more efficiently and generates less heat. Aluminum, while still a good conductor, requires a larger gauge wire to carry the same current as copper.
Another major difference is durability. Copper is more flexible and stronger than aluminum. It’s less likely to break or corrode and holds up better over time, especially at connection points. Aluminum expands and contracts more with temperature changes, which can lead to loose connections, arcing, or overheating at outlets and switches.
That doesn’t mean aluminum is unsafe, but it does mean it requires more attention to detail in installation and upkeep.
Cost is often the deciding factor for many homeowners. Aluminum wiring is generally less expensive to install than copper. The material itself costs less, and because it’s lighter, it’s easier to handle during installation, potentially reducing labour time.
But while aluminum wiring may save money up front, it can come with long-term costs. Homes with aluminum wiring often require regular inspections, updates to connectors, and occasional repairs to maintain safe performance. By contrast, copper wiring, though more expensive initially, is typically more durable and less maintenance-intensive over time.
This is an important consideration if you plan to stay in your home for many years. Long-term reliability often makes copper worth the investment.
That said, aluminum wiring still offers real benefits when handled properly. For homeowners looking to keep installation costs down or working on large-scale renovations, it remains a practical choice. With the right safety measures and expert installation, aluminum wiring can deliver reliable performance and longevity.
Safety is one of the biggest concerns when comparing copper versus aluminum wiring. Aluminum expands more than copper when it heats up. That expansion and contraction can loosen wire connections, especially at outlets, switches, and junction boxes.
Over time, these loose connections can cause overheating, sparking, or even fires. Oxidation is another issue. When aluminum oxidizes, the resulting material is a poor conductor, which increases resistance and heat buildup.
That said, modern aluminum wiring systems, when installed properly with approved connectors and materials, can still be safe. Devices like AlumiConn connectors or copper pigtailing help reduce the risk of loose connections and overheating. If your home has aluminum wiring, routine inspections from a licensed electrician are essential.
Hi-Lite Electric specializes in aluminum wiring inspection, repair, and retrofitting services. We use certified materials and installation methods that meet Ontario’s electrical code and insurance standards. Our electricians ensure aluminum wiring is safe, secure, and built to last.
If you’re thinking long-term, the type of wiring in your home can impact resale value and insurance rates. Many insurance companies consider aluminum wiring in homes to be a higher risk. Some may increase your premiums or even refuse coverage unless specific safety upgrades have been made.
Copper wiring is typically viewed as the safer option and may make your home more attractive to future buyers. It can also prevent potential hurdles during home inspections or real estate transactions.
Before selling or refinancing, check with your insurer and consider having a licensed electrician evaluate your home’s wiring. Even minor upgrades can make a significant difference.
That said, properly maintained aluminum electrical wiring in houses does not have to hurt resale value. With updated connectors and a safety inspection report from a licensed professional like Hi-Lite Electric, you can show potential buyers and insurers that your system is safe and compliant.
If your home already has aluminum wiring, you’re not alone. Many older homes throughout Ontario still use it. The good news is that you don’t always need to do a full replacement. Depending on the condition and type of aluminum wiring, you may have options:
Whatever route you choose, it’s crucial to work with a licensed professional. DIY fixes or unapproved materials can actually increase risk.
Hi-Lite Electric offers a full range of services for aluminum wiring in homes. Whether you’re looking to upgrade, repair, or inspect your current wiring, we provide custom solutions to improve safety and meet code.
The wiring in your home isn’t something to overlook; it’s the lifeline of your electrical system. Whether you’re deciding between aluminum and copper or are concerned about existing wiring, Hi-Lite Electric is here to help.
We bring years of experience, safety-focused solutions, and a deep understanding of residential wiring systems to every job. Our team provides honest advice, high-quality workmanship, and peace of mind.
Aluminum wiring doesn’t have to be a problem, not when you have the right professionals on your side. With our expert electricians, modern materials, and proven methods, we make aluminum wiring a safe, effective solution for today’s homes.
Reach out to Hi-Lite Electric today at (416) 223-9655, email info@hi-liteelectricinc.ca or click here to get in touch online.
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