Copper Metal Roof: Cost, Patina and How Long It Lasts

A copper metal roof is the longest-lasting roof most homeowners can buy, with a service life that can pass 100 years, and it's also one of the most expensive. Cost guides we checked in October 2026 put installed copper at roughly $15 to $40 per square foot, depending on the panel style and the job. Most homeowners use copper on a bay window, porch or dormer rather than the whole house, which gets the look at a fraction of the price.

Cost

Copper roof type	Installed cost per sq ft (national range)
Copper shingles	about $15 to $25
Standing seam copper	about $18 to $40
Accent roofs (bay windows, cupolas)	Often priced per job; small areas cost more per foot

Ranges are from HomeAdvisor, HomeGuide and This Old House and move with the price of copper. A full roof on a typical house runs well into five figures, so get several quotes from contractors who have done copper before. Copper work is a specialty, and soldering skill shows.

16 oz vs. 20 oz copper

Copper sheet is sold by weight per square foot.

• 16 oz (about 0.0216 inch thick) is standard for roofing panels, flashing and gutters.
• 20 oz (about 0.027 inch) is stiffer, dents less and is used for larger panels, high-wind areas and long-life commercial work.

Lighter "12 oz" or copper-coated products cost less but don't last the same way.

The patina

New copper is bright, then turns brown within months, and slowly develops the blue-green patina (verdigris) over roughly 10 to 30 years, faster in salty or humid air and slower in dry climates. The patina is a stable protective layer, not damage. You can:

• let it age naturally,
• apply a clear coating to keep it bright (needs reapplying),
• buy pre-patinated copper to get the green look now.

What to pair with it

Copper is more noble than almost every other building metal. Water running off copper corrodes aluminum, galvanized and Galvalume below it. So:

• Use copper gutters, downspouts and flashing with a copper roof. See half round gutters and copper gutter guards.
• Use copper or stainless steel nails and cleats. Never steel nails.
• Expect green staining on stone, stucco or light siding below where runoff drips.

Pros and cons

Pros	Cons
Can last 100+ years	High upfront cost
Light weight, often no extra structure needed	Few qualified installers in some areas
Recyclable; old copper has scrap value	Staining below runoff
Distinctive look that ages well	Theft risk on accessible gutters and downspouts
No painting, ever	Expands and contracts a lot; needs proper cleats and expansion joints

Is copper worth it?

For a whole house, copper makes the most sense on a historic or high-end home you expect to keep for decades. For everyone else, a copper accent roof over a bay window or entry is the sweet spot. Pair the rest of the house with standing seam steel or a Galvalume roof, and keep copper runoff away from it.