How long does a metal roof last?
Updated August 2026
A metal roof lasts 40–70 years, two to three times the life of asphalt shingles. Where it lands inside that range comes down to how the panels attach: a standing-seam roof with hidden clips runs 50 or more years, while an exposed-fastener panel roof lasts 30 to 45 because every screw has a rubber washer that dries out and leaks long before the metal fails. The two things that decide longevity are the factory coating that protects the metal and, on screw-down roofs, staying ahead of the fasteners and sealant at the seams.
Lifespan by type and situation
| Type or situation | Typical lifespan | Why |
|---|---|---|
| Standing-seam steel | 50+ years | Hidden clips let the metal expand and contract; no exposed screws to leak |
| Exposed-fastener steel | 30–45 years | Screw washers dry and leak in 15–20 years, well before the panels wear out |
| Aluminum | 50+ years | Will not rust, so it is the pick near salt coasts and pools |
| Zinc or copper | 60–100 years | Premium metals that patina and effectively last the life of the house |
| Corrugated / ag panel | 25–40 years | The budget option; thinner steel and exposed fasteners cap its life |
| Coating faded, seams neglected | Cut 10–20 years | A failed coating lets steel rust and dried washers let water in |
Signs yours is near the end
- Rust streaks, bubbling, or chalky white spots where the protective coating has worn through
- Screw heads backing out, or cracked and flattened rubber washers on an exposed-fastener roof
- Seams or ridge caps that have loosened, separated, or lost their sealant
- Faded, peeling, or blistering paint that no longer beads water
- Loose, dented, or oil-canning panels that ripple in the sun
- Interior stains or attic moisture tracing back to a seam or fastener line
How to add years
Metal roofs mostly take care of themselves, but the details at the seams and fasteners are what separate 40 years from 70. On an exposed-fastener roof, plan to re-tighten or replace the screws and their rubber washers around year 15 to 20, since a dried washer leaks long before the panel does. Keep the roof clear of trapped leaves and standing debris, and touch up any scratch that exposes bare steel before it rusts. A periodic professional look, laid out on the metal roof maintenance checklist, catches loose seams and coating wear early. When damage does show up, the repair-or-replace guide helps you decide between a panel swap and a recoat versus a full tear-off, and the replacement-timing guide covers how the type of metal moves that clock. If you are still choosing a system, what a metal roof is compares the panel styles.
What it costs to replace: plan on $15,000–35,000 installed. Replacing on your own schedule, before it fails, is almost always cheaper than the emergency version. The home maintenance cost calculator helps you set the money aside before it comes due.
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Track your home's systems, free for 30 daysFrequently asked questions
Does a metal roof really last 50 years?
A quality standing-seam steel or aluminum roof genuinely does, and copper or zinc can pass 70. The number depends on the attachment and the coating. Standing-seam systems hide the fasteners and let the panels move with heat, so there is nothing exposed to fail, and they routinely reach 50-plus. Cheaper exposed-fastener panels are the exception: the metal lasts, but the rubber washers on the screws dry out and leak in 15 to 20 years, so those roofs land closer to 30 to 45 unless the fasteners are serviced.
Do metal roofs need any maintenance?
Less than shingles, but not zero. Standing-seam roofs mostly need debris kept off and an occasional inspection of the seams and flashings. Exposed-fastener roofs need real attention: the screws and their washers should be checked around year 15 and re-tightened or replaced as they age, since that is where leaks start. On any metal roof, touch up scratches that reach bare steel before they rust, and clear valleys and gutters so water does not pond. A professional inspection every few years is cheap insurance on a roof meant to last decades.
Can you install a metal roof over existing shingles?
Often yes, and it is one reason metal appeals. Most codes allow metal panels over one existing layer of shingles, usually on furring strips or a slip sheet that keeps the two surfaces from trapping moisture and abrading. It saves the labor and disposal cost of a tear-off, several thousand dollars on an average roof. The catch: it only works if the roof deck underneath is sound and dry. If there is rot, sagging, or a leak history, you tear off first, because burying a bad deck just hides the problem.