Solar Panels on a Metal Roof: What Michigan Owners Need to Know

If you have a metal roof and you’re wondering whether solar is even an option, the short answer is yes, and in a lot of ways, metal roofs are one of the better surfaces to install solar on. The mounting hardware is purpose-built for it, the roof itself is strong enough to handle the load without reinforcement, and the long lifespan of metal roofing means you’re unlikely to face the headache of pulling panels off mid-life for a roof replacement.

Why Metal Roofs Are a Good Match for Solar

The biggest advantage a metal roof has over asphalt when it comes to solar is longevity. Most metal roofs last 40 to 70 years or more. Solar panels typically carry 25 to 30-year warranties and keep producing well beyond that. Put those two timelines together and you’ve got a roof that will likely outlast your first set of panels without needing to be touched.

That matters more than it sounds. When a homeowner with asphalt shingles needs a new roof partway through their system’s life, the solar panels have to come off first, then go back on after the roof is done. That’s a real cost and a real hassle. With a metal roof, it’s a non-issue.

Beyond lifespan, metal roofing is lightweight and structurally strong. Solar panels add weight to a roof, but metal roofs handle that load without needing deck reinforcement in most cases. Many newer metal roofs also have reflective coatings that help keep surface temperatures down on hot summer days, which can help panels run slightly cooler and hold efficiency a bit better. For a full breakdown of how roof orientation and pitch affect output, see our guide on best solar panel placement.

The Three Main Types of Metal Roofs and How Solar Is Mounted on Each

Not all metal roofs are the same, and the profile of your roof determines how panels get attached. There are three common types, and each has a well-established mounting approach.

Standing Seam Metal Roofs

Standing seam roofs have raised vertical ribs running the length of the roof, and those ribs are exactly what solar mounting hardware is designed to clamp onto. No holes are drilled. No penetrations are made in the roof surface. Clamps attach directly to the seams, the racking system goes on top, and the panels follow.

This is the most installer-friendly metal roof profile for solar. It’s faster to mount, the roof warranty typically stays intact, and there’s no leak risk introduced by the installation. If you have a standing seam roof, solar is about as straightforward as it gets.

Corrugated Metal Roofs

Corrugated metal roofs, the kind you’ll find on a lot of Michigan barns, outbuildings, and older commercial buildings, require a different approach. Because there are no seams to clamp to, brackets have to be fastened through the roof surface into the purlin or truss structure below.

That means penetrations, but it doesn’t mean problems, as long as the installer is using the right hardware. Quality mounting systems for corrugated roofs use brackets designed to sit on the ridges of the roof, with rubber gasket seals and stainless fasteners that keep water out for the life of the system. When it’s done correctly, the installation is weathertight.

One thing worth checking before you move forward: penetrating a corrugated metal roof can affect the manufacturer’s warranty on the roofing material itself. It’s worth confirming that with your roofer and your solar installer before work begins.

Trapezoidal and Ribbed Exposed-Fastener Roofs

Trapezoidal and ribbed roofs follow a similar logic to corrugated. Brackets are fitted over the ridges and fastened through to the structure below, with sealant applied at each penetration point. This profile is common on industrial buildings, warehouses, and some commercial structures across Michigan. The installation is a bit more involved than standing seam, but it’s well within standard practice for experienced installers.

Why Metal Roofs Handle Snow and Ice Well

Snow load is a legitimate consideration for any solar installation in Michigan, and it’s worth understanding how metal roofs factor in.

Michigan’s building code requires that any roof supporting solar panels be evaluated for the combined weight of the panels and anticipated snow load. That sounds like a potential obstacle, but metal roofs are already engineered for Michigan winters. They’re built to carry significant snow weight, and their smooth surface helps snow and ice slide off faster than it would on asphalt shingles. In practice, that means your panels are more likely to self-clear after a snowfall, which is good for both your roof and your system’s winter output.

For commercial buildings, a structural engineer may need to inspect and sign off on the roof before installation moves forward. This is part of the standard permitting process, and Strawberry Solar coordinates it as part of the project. If the roof needs any reinforcement, the engineer will note it and recommend next steps.

The permitting process in Michigan varies by municipality, but the structural evaluation is handled on our end. You don’t need to figure that out on your own.

Does the Roof Type Affect Installation Cost?

Somewhat, but probably less than you’d expect.

Standing seam roofs tend to be slightly faster to install on because there’s no drilling involved and the clamp hardware goes on quickly. That can mean a modest reduction in labor cost compared to corrugated or ribbed roofs, where sealing each penetration point adds time.

Mounting hardware generally accounts for roughly 10 to 25% of total system cost. Roof type can shift where you land in that range, but it’s rarely the dominant cost driver. System size, panel selection, and inverter configuration typically have a bigger impact on the final number than whether your roof is standing seam or corrugated.

If you’re weighing a metal roof replacement alongside a solar installation, it can make sense to coordinate both at once. Installing solar shortly after a new metal roof goes on means the roof is in ideal condition and the installation crews can work together on the plan.

What to Ask Your Installer Before You Start

Metal roof solar installations aren’t complicated, but they do require an installer who knows the specific profile of your roof and has the right mounting hardware on hand. Before you commit to anyone, it’s worth asking a few direct questions.

Do they have experience with your specific metal roof profile, whether standing seam, corrugated, or ribbed? What mounting system do they plan to use, and is it compatible with your roof manufacturer’s warranty? If penetrations are required, how will they be sealed, and what workmanship warranty covers the installation? For commercial buildings, is a structural inspection included in the process?

A knowledgeable installer will have clear answers to all of these. If the response is vague, that’s useful information too.

Ready to Go Solar on Your Metal Roof?

Metal roofing and solar are a practical combination, and Michigan’s climate actually plays in your favor. The same characteristics that make metal a smart roofing choice here—durability, snow-shedding, long lifespan—also make it a solid base for a solar system.

Whether you’re a homeowner pursuing residential solar installation with a standing seam roof in Rochester Hills or a business owner planning commercial solar installation on a corrugated metal building in Kalamazoo, the installation approach is well-established. DTE Energy and Consumers Energy customers with metal roofs qualify for the same distributed generation program as everyone else, and Michigan Saves financing is available for eligible projects regardless of roof type.

Strawberry Solar has installed on standing seam, corrugated, and ribbed metal roofs across the Lower Peninsula. If you’re ready to see what a system would look like on your building, we’re glad to take a look.