Fencing · Aluminum fence (powder-coated)
How long does an aluminum fence last?
Aluminum does not rust, which is why the fence is sold on a lifetime warranty and why nobody publishes a service life for it — no trade association and no baseline chart carries a figure for aluminum fencing. The only numbers in print come from the warranty itself, and they say what the word "lifetime" does not: the payout steps down every few years, the term is cut to a quarter within a mile of salt water, and it does not follow the house.
Updated
The gap: the paper says “Lifetime” — "Limited Lifetime" on aluminum covers cracking, peeling and blistering of the finish and "extensive corrosion," which the paper defines as multiple rust-through perforations in the same piece — a definition written around steel, and one aluminum does not reach. Three conditions do most of the work. The warranty has to be registered within 30 days of receiving the product. It is not transferable to any later purchaser or owner. And on powder-coated products the remedy is prorated: full replacement value only through year seven, then 80% to year 15, 70% to year 20, 60% to year 25, and 50% after that. Distance from salt water rewrites the length itself — within one mile of a saltwater coastline the term is reduced to 25% of its stated period, and between one and ten miles to half. The owner must also be able to show a record of reasonable maintenance, and cut ends must have been filed clean and given at least two coats of the maker's touch-up paint at installation, or the coverage is void. Typical service life is still 25+ years. Warranty document (Fortress Building Products, checked 2026-08-27)
Typical service life: 25+ years
There is no independent figure to quote here. No trade association and no baseline life-expectancy chart carries a row for aluminum fencing, and the extrusion is not the part that ages — aluminum forms its own oxide skin and does not rust through. The only published, numbered horizon is the maker's own powder-coat replacement schedule, which pays 100% of replacement value in years 1–7, 80% through 15, 70% through 20, 60% through 25, and still contemplates a claim at 50% "over 25 years" with no end date on it. The 25 is that schedule's open last band; the 50 only bounds the drawing. Both numbers on this page — the service-life band and the warranty term — come off the same sheet of paper, written by the company selling the fence, and that is worth knowing before either one is leaned on.
Tier 1 · manufacturer document Range from Fortress Building Products — Fencing Limited Warranty — powder-coated replacement schedule, checked 2026-08-27.
Aluminum's climate story is the coast, and it is written into the paper rather than into the metal. The extrusion tolerates salt air far better than steel does; the powder coat over it does not, which is why the manufacturer shortens its own term to a quarter within a mile of salt water and to half out to ten miles. Inland, what ages an aluminum fence is ultraviolet light on the finish and whatever hits it.
What the warranty paper actually says
Fortress Building Products (Athens Residential aluminum — Limited Lifetime Manufacturer warranty) publishes a “Lifetime” limited, prorated, non-transferable, conditional warranty. "Limited Lifetime" on aluminum covers cracking, peeling and blistering of the finish and "extensive corrosion," which the paper defines as multiple rust-through perforations in the same piece — a definition written around steel, and one aluminum does not reach. Three conditions do most of the work. The warranty has to be registered within 30 days of receiving the product. It is not transferable to any later purchaser or owner. And on powder-coated products the remedy is prorated: full replacement value only through year seven, then 80% to year 15, 70% to year 20, 60% to year 25, and 50% after that. Distance from salt water rewrites the length itself — within one mile of a saltwater coastline the term is reduced to 25% of its stated period, and between one and ten miles to half. The owner must also be able to show a record of reasonable maintenance, and cut ends must have been filed clean and given at least two coats of the maker's touch-up paint at installation, or the coverage is void.
The warranty document itself , checked 2026-08-27.
What shortens it
- Salt air — the same paper that calls the term lifetime cuts it to a quarter of its length within a mile of the coast, and to half out to ten miles
- Scratches, nicks and dents that expose bare metal, which the warranty names as an excluded cause of corrosion rather than a covered one
- String trimmers and mower decks working along the bottom rail, where most of those scratches come from
- Pool chemicals and de-icing salts splashed or spread against the pickets
- Cut ends left unfiled and unpainted at installation, which the warranty treats as a condition rather than a suggestion
Signs of wear to look for
- Chalky residue on a rag wiped across a picket, and a visible color difference between the sunny and shaded faces of one run
- Coating lifting at cut ends and around the punched holes where rails enter posts
- White powdery blooms where the coating has been breached and the aluminum under it is oxidizing
- Pickets bent or pushed out of line — thin-wall extrusions stay bent rather than springing back
- Rust streaks running down a picket, which on an aluminum fence come from a steel fastener or a steel gate part, not from the fence itself
Other fencing materials
- Wood fence (pressure-treated pine) about 20 yrs
- Vinyl fence (PVC) 100+ yrs
- Chain-link fence (galvanized) 20–70 yrs
- Wrought iron fence 100+ yrs
- Composite fence 25+ yrs