A copper roof is one of the longest-lasting roofs you can put on a building, and it’s the most expensive metal most homeowners will ever price. It never needs paint, it weathers from bright penny to brown to green, and when it’s properly designed and installed it can last for generations.

The honest answer for most projects: if you love real copper and the budget allows, it’s a beautiful choice, especially as an accent. If you want the look or the aging without the price, painted or weathering steel gets you close. Metal America doesn’t sell copper. We roll steel. So here’s a fair look at both.

What a copper roof is

A copper roof is made from sheet copper formed into standing seam, batten seam or flat-seam panels. Installers hold it down with cleats and clips, and many joints get soldered. Copper doesn’t need a paint or coating, because the metal itself is the finish.

You’ll most often see copper on accents: bay windows, porch roofs, dormers, cupolas and entry canopies. Full copper roofs show up mostly on high-end homes, churches and historic buildings.

How a copper roof ages

New copper is bright and shiny. Within months it darkens to a brown, and over years it can develop the blue-green patina people picture. How fast that happens depends on moisture, climate and what’s in the air. In drier climates, the green can take a very long time, and some roofs stay brown for good. If you want the green look on day one, pre-patinated copper is available, at a higher price.

Copper roof pros and cons

The Copper Development Association’s architecture resources are the best neutral source if you’re specifying a full copper roof and want the technical details.

Steel alternatives to a copper roof

If the cost or the installer search rules out copper, steel gets you most of the way there for a lot less.

Copper Metallic painted steel

Copper Metallic is one of our colors to order. It gives you the look of new copper on a steel panel. The difference: it stays that color. It won’t brown or go green, so think of it as copper frozen at day one.

Cor-Ten weathering steel

If what you love about copper is that it ages, Cor-Ten is the closer match in spirit. It’s weathering steel that forms a stable rust patina, so it goes orange-brown instead of green. Read more on Cor-Ten weathering steel panels, and how real Cor-Ten compares to painted versions in our guide to rust look metal panels.

Bronze tones

If you’re after the deep brown copper turns a few years in, our 24 gauge PVDF premium colors include Medium Bronze and Dark Bronze. Order free color chips and hold them up next to a weathered copper sample before you decide.

For the panel side of a steel roof, our guide to standing seam metal roofing is the place to start, and what drives metal roofing prices explains how gauge, paint system and profile move the number.

Mixing copper accents with a steel roof

Lots of people put a copper roof on a bay window or porch and steel everywhere else. That works, as long as the copper’s runoff doesn’t land on other metals. Water coming off copper can corrode Galvalume, galvanized steel and aluminum below it, so plan the drainage so copper drains into copper gutters or straight to the ground. Our pages on Galvalume metal roofing and gutters for a metal roof cover those materials in more detail.

FAQ

Does a copper roof need to be painted or sealed?

No. Copper doesn’t need paint or a coating. The patina it forms is what protects it.

How long does it take a copper roof to turn green?

It varies a lot. Moisture, climate and air quality all play in, and in a dry climate it can take a very long time or never fully happen.

Is there a metal roof that looks like copper?

Yes. Copper Metallic painted steel gives you the look of new copper, and Medium Bronze or Dark Bronze come closer to copper that’s weathered a few years.

Bottom line

A copper roof is a premium choice that ages beautifully, costs the most, and needs a specialist to install. If that fits your project, go for it. If you want the look or the aging for less, Copper Metallic, Cor-Ten and our bronze tones are worth a look. Request free color samples or give us a call, and we’ll help you compare.