Metal rooflifespan
A metal roof lasts 40 to 80 years depending on the type, and a standing seam steel roof sits at the top of that range.1 Screw-down panels are the exception, because the washers under the screws can fail within three to five years.3
Years bytype of metal roof
The type of metal roof decides the number more than the metal does. Published ranges for the three systems you see on El Paso homes and buildings are below.
| Roof type | Published years | What limits it |
|---|---|---|
| Standing seam steel | 50 to 80 (This Old House) or 40 to 70 (HomeAdvisor) | Finish and seam sealant |
| Stone-coated steel | 40 to 70 (DECRA, HomeGuide) | Chip loss and flashing |
| Exposed-fastener panels | Panels last; washers can fail in 3 to 5 | Washers under the screws |
Figures from sources 1 to 5. They are published ranges, not a warranty on any one roof.
A standing seam roof hides its fasteners under raised seams, which is why it earns the longest numbers.12 Stone-coated steel follows at 40 to 70 years.45 The metal under the coating withstands the elements and impacts better and longer than asphalt shingles.5
Exposed-fastener roofs, the corrugated panels common on warehouses and metal buildings, need a different expectation. NRCA-aligned writers say such a system is not meant to add to the roof's expected long-term life.3 The panel can outlast the screws, so these roofs are re-fastened along the way.
What wears outbefore the panel
Fasteners and washers go first. The washer under a screw head is rubber or a similar material that breaks down in sunlight, and it can fail within three to five years.3 Once it cracks, water follows the screw into the deck.
The wrong fasteners or flashing can also invite corrosion over time, and hot or cold swings put extra stress on seams.2 The rust in the photo at the top of this page sits along the ribs and around the fasteners, where this wear shows first.
- Washers and screws, which loosen or crack long before the steel does.
- The paint finish, which fades and chalks in strong sun.
- Sealant at laps, flashings, and penetrations, which dries and separates.
Lifetime Roofing of El Paso does this work on metal roof repair calls: re-fastening, resealing laps, and replacing worn flashing so the panel keeps doing its job.
Hail dents androof life
Hail dents up to about 2.5 inches across generally count as cosmetic, not functional damage, and they don't corrode faster than the flat steel around them.7 Haag Engineering puts the size needed to rupture metal panels in good to fair condition at 2.5 inches or more.8
The damage that does shorten a roof's life is functional: tears in the panel, opened seams, and lost coating.7 After a hailstorm, an inspector looks for those, not just for dents.
Repair or replacean older metal roof
Age alone doesn't say a metal roof is finished. A 20-year-old standing seam roof with sound panels may need only new sealant and flashing, while a screw-down roof of the same age may need every screw reset.
HomeAdvisor's rule of thumb is to replace when one repair would cost more than half of a replacement.2 The same source suggests cleaning a metal roof yearly and resealing it about every 10 years.2 For what a new roof runs, see the guide on metal roof cost.
Check this first. Look at the fasteners, seams, panels, and flashing before you decide on age.
The free inspection from this roofing company in El Paso covers those four things, and the written estimate follows within 48 hours of the inspection. When a repair will do, we quote the repair.
Stone-coated steeland its warranty
DECRA stone-coated steel is a separate system from bare metal panels. The steel is dipped in a zinc-aluminum alloy, then coated with silicon, acrylic resin that guards against UV, and natural stone granules.4
IKO Metals says every roof on a detached single-family home carries a Lifetime Limited Warranty, transferable once during the first 20 years. It covers specified hail damage, wind uplift, and chip loss or color fade when they come from manufacturing defects.6 Lifetime Roofing of El Paso prints its own transferable warranty on its installation work beside the maker's and hands the paper over at the end.
If you are weighing metal against asphalt, the guide on metal roof vs shingles lays out the trade-offs.
Questions people askabout metal roof life
Does an exposed-fastener metal roof last as long as standing seam?
No. The panels can last for decades, but the washers under the screws can fail within three to five years, and the roof then needs re-fastening. Lifetime Roofing of El Paso checks every screw line during a free inspection.
What wears out first on a metal roof?
Fasteners first. The fasteners and their washers, then the paint finish, then the sealant at seams and flashings. The steel panel itself usually outlasts all three. Lifetime Roofing of El Paso repairs these parts before replacing a panel that is still sound.
Do hail dents shorten the life of a metal roof?
Usually not. A 2025 IIBEC study found dents from hail up to about 2.5 inches are generally cosmetic. Torn panels, opened seams, and lost coating are the damage that shortens a roof's life.
Should I replace a 20-year-old metal roof?
Not by age alone. Lifetime Roofing of El Paso inspects the fasteners, seams, panels, and flashing for free, and quotes a repair when a repair will do. Replacement makes sense when repairs cost more than half of a new roof.
Is stone-coated steel the same as other metal roofing?
No. It is a separate system. DECRA stone-coated steel has a zinc-aluminum coated steel core, an acrylic layer, and stone granules on top. Lifetime Roofing of El Paso installs DECRA by IKO Metals and hands over the warranty paper at the end.
Where these factscome from
- This Old House, Standing Seam Metal Roof Cost, updated March 31, 2026, read November 1, 2026.
- HomeAdvisor, Metal Roof Installation Cost, June 19, 2026, read November 1, 2026.
- Professional Roofing, article on exposed-fastener metal roof systems, October 2022, read November 1, 2026.
- DECRA, What Is Stone-Coated Metal Roofing, November 3, 2025, read November 1, 2026.
- HomeGuide, Stone-Coated Steel Roofing Cost, read November 1, 2026.
- IKO Metals, IKO Metals, read November 1, 2026.
- IIBEC Interface, A deep dive into hail-caused dents in Galvalume-coated steel roof panels, Fall 2025, read November 1, 2026.
- Haag Engineering, August 2018 blog post, read November 1, 2026.
More fromthe guides
- Metal Roof vs Shingles in El Paso
Is metal cheaper than shingles? Cost, heat, wind, hail, and insurance compared.
- Metal Roof Cost: Outside Price Ranges
What a metal roof costs per square foot and per house, from cited outside guides
- Stone Coated Steel Roof Cost
What outside guides charge per square foot for a stone-coated steel roof
Call Lifetime Roofing of El Paso
(915) 353-3934
Get a free roof inspection
Based at 8900 Gateway Blvd E, El Paso, TX 79907