Energy Efficiency Face-Off: Which Roof Saves You More on Heating Bills?
When Maine winters roll in, your roof becomes your home’s first line of defense against the cold. But not all roofing materials perform the same when it comes to energy efficiency. The right roof can mean the difference between a comfortable home and skyrocketing heating bills.
So, which roof really saves you the most? Let’s break down the contenders—asphalt shingles, metal roofing, and rubber roofing—and see who comes out on top in the energy-efficiency face-off.
1. Asphalt Shingles: The Familiar Favorite
Asphalt shingles are the most common roofing material across Maine, and for good reason—they’re affordable, durable, and available in countless styles. But when it comes to insulating your home, they’re only moderately efficient.
Asphalt roofs absorb a lot of solar heat, which helps during the winter months by slightly reducing heating demand. However, they also tend to trap that heat unevenly, especially if your attic isn’t properly ventilated.
Result: With the right ventilation and attic insulation, asphalt shingles perform decently—but they aren’t the top energy saver on the list.
Best for: Homeowners looking for a cost-effective, middle-of-the-road energy performer.
2. Metal Roofing: The Year-Round Champion
Metal roofing has earned its reputation as a Maine homeowner’s dream material—and energy efficiency is one of the biggest reasons why. In the summer, metal roofs reflect sunlight instead of absorbing it, which keeps attic temperatures lower.
But in winter, it’s a different kind of win. A well-insulated metal roof holds interior heat efficiently while shedding snow quickly—preventing ice dams that can lead to costly damage and energy loss.
Because metal roofing creates a tight seal against air leaks, your home retains warmth more consistently. Combine that with a reflective coating or proper underlayment, and you can see up to 20–25% lower energy bills compared to older asphalt systems.
Result: Metal roofing wins the overall efficiency contest hands down.
Best for: Homeowners looking for long-term energy savings, durability, and modern style.
3. Rubber Roofing: The Flat Roof Specialist
Rubber (EPDM) roofing may not look like a contender, but for flat or low-slope roofs, it’s a quiet powerhouse. The material is dense and provides excellent insulation against both cold and heat transfer.
When paired with light-colored coatings or reflective membranes, it dramatically reduces heat loss in winter and heat absorption in summer.
Rubber roofing also seals tightly, preventing drafts and air leaks—an underrated factor in energy efficiency. For commercial buildings or low-slope homes, this option can offer serious savings over time.
Result: An excellent performer in its category, especially when installed with proper insulation layers.
Best for: Flat-roof homes and commercial buildings looking for dependable thermal control and durability.
4. Bonus Efficiency Factors That Matter
No matter the material, a roof’s performance depends on more than just its surface. True energy savings come from a system approach:
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Proper attic insulation prevents heat from escaping upward.
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Balanced ventilation keeps air moving to prevent condensation and ice dams.
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Tight flashing and seals reduce drafts and water intrusion.
At A Plus Roofing, we inspect every layer of your roof—not just the shingles—so you get maximum performance through every season.
The Verdict: Metal Roofing Takes the Lead
When you compare total energy efficiency—heat retention, air sealing, snow shedding, and long-term cost savings—metal roofing consistently comes out on top for Maine homes. Rubber roofs hold their own for flat or commercial applications, while asphalt remains a reliable, affordable option for those balancing budget with performance.
If you’re ready to stop losing heat (and money) through your roof, talk to our team today. We’ll evaluate your home’s structure, insulation, and climate conditions to recommend the most energy-efficient roofing system for your needs.