How long do aluminum gutters last?

A well-installed aluminum system usually lasts 20 years or more. Heavier coil, good hangers and regular cleaning push it toward the top of that range; thin coil under heavy trees and snow wears out sooner.

Are aluminum gutters better than vinyl?

For most homes, yes. Aluminum handles temperature swings and sunlight without becoming brittle, it can be seamless, and it carries more weight between hangers. Vinyl is cheaper and simpler for DIY on small, mild-climate jobs.

Can aluminum gutters rust?

No. Aluminum oxidizes but does not rust like steel. It can corrode where it touches copper, wet treated lumber or steel fasteners, so matching fasteners and barriers matter.

What gauge aluminum gutter should I get?

Ask for .032 inch on a two-story home, in snow country or under big trees. Thinner coil is acceptable on small single-story homes in mild climates.

Are metal rain gutters better than plastic ones?

For most homes, yes. Aluminum and steel hold their shape in heat and cold and carry more weight between hangers than vinyl.

Materials

Aluminum Gutters: Gauges, Finishes and Seamless Systems

Aluminum is the metal on most American houses, and for good reason. It does not rust, it is light enough to hang in long runs, and it can be formed seamless in the driveway. The details that separate a good aluminum system from a poor one are less obvious.

Updated 2026-10-26 · Gutter Fixing Editorial Team

Walk down almost any suburban street and the gutters you see are aluminum. The material took over from galvanized steel from the 1960s onward, once portable roll-forming machines let installers turn a coil of painted metal into a continuous gutter on site. Today aluminum rain gutters make up the large majority of residential installs, and nearly every seamless gutter is aluminum.

That popularity can make aluminum sound like a commodity, but the quality range is wide. Two quotes for "aluminum gutters" can describe very different products: thin coil with spikes every three feet, or heavier coil with screwed hidden hangers and larger outlets. Knowing what to ask for is most of the value of this page.

Why aluminum rain gutters became the default

It does not rust. Aluminum forms a thin oxide layer that protects the metal underneath, so a scratch does not become a hole the way it can on steel.
It is light. A 40-foot run can be lifted by two people and hung without heavy equipment, which keeps labor time down.
It forms easily. Aluminum coil runs through a seamless machine quickly and cleanly, so long runs need no joints except at corners.
It takes a factory finish. Coil comes pre-painted in dozens of colors with a baked finish that resists chalking and peeling for many years.
It is widely stocked. Hangers, outlets, end caps, elbows and downspouts are available everywhere, so repairs years later are simple.

Gauge: the number that matters most

Aluminum gutter coil is sold by thickness, measured in thousandths of an inch. Residential coil usually comes in .019, .025, .027 and .032 inch. The thinnest coil is common in big-box store sections and the cheapest seamless jobs. It looks identical on day one, but it dents when a ladder leans on it, bends under a sliding load of snow, and can wave between hangers on a hot day.

Heavier coil costs a little more per foot and is noticeably stiffer. For homes in snow country, under large trees, or where a ladder will lean on the gutter for cleaning, the heavier gauge is worth it. Ask every installer to write the gauge on the quote. If they will not, assume it is the thinnest they carry.

Coil thickness	Where you see it	How it behaves
.019 inch	Some sectional kits and budget installs	Dents easily; weakest under ice and ladders
.025 to .027 inch	Most standard seamless jobs	Adequate on single-story homes in mild climates
.032 inch	Better residential and light commercial work	Resists dents and sagging; preferred in snow and storm areas

Seamless aluminum rain gutters versus sectional

Sectional aluminum gutters come in 10-foot or 20-foot lengths joined with slip connectors and sealant. They suit small DIY jobs, sheds and repairs to an existing sectional system. Each joint is a place to leak as the sealant ages, so a house with a dozen joints will need resealing over the years.

Seamless aluminum gutters are formed on site to the exact length of each wall, so the only joints are at corners and end caps. They cost more than buying sectional pieces but less than most people expect, because installation is fast once the machine is set up. For a whole house, seamless is the better value. The full service is covered on the seamless gutters page.

Finishes and colors

Most aluminum coil is coated at the factory with a polyester or enhanced paint system, baked on before the coil is ever formed. Manufacturers usually offer 20 to 30 stock colors, from white and almond to dark bronze and black. The finish is what most people notice, and a quality coating will hold color for decades with only gentle washing.

Mill-finish aluminum, bare and unpainted, is cheaper but rarely used on homes because it dulls and oxidizes to a chalky grey. It still appears on agricultural buildings, sheds and some commercial work where looks matter less. For color choices and how they look against different siding, see the gutter colors guide.

Painting existing aluminum gutters

Aluminum gutters can be repainted when the color has faded or no longer suits the house. The job is mainly preparation. The surface must be washed to remove dirt and chalky oxidation, lightly scuffed, and primed with a primer made for aluminum or galvanized metal. A good exterior acrylic topcoat then goes on in thin coats.

Paint on aluminum will not last as long as the factory finish, because a site-applied coat never bonds as well as a baked one. If the gutters are also leaking, sagging or thin, the money is usually better spent on new coil in the color you want.

Where aluminum is not the best choice

Coastal salt spray: aluminum resists it far better than steel, but cheap coatings can fail and fasteners of a different metal corrode fast. Use matching aluminum or stainless fasteners.
Very heavy snow load: in mountain areas, even heavy aluminum can be pulled down by sliding snow. Steel or close hanger spacing with snow guards on the roof may be better.
Historic buildings: on period homes, conservation rules or simple appearance often call for copper, zinc or half-round profiles.
Contact with copper or treated lumber: aluminum touching copper flashing, or wet pressure-treated wood, can corrode. A barrier or a different material is needed.

Aluminum on metal buildings and metal roofs

Aluminum gutters are common on steel barns, shops and pole buildings. They are fastened to the girt or eave strut rather than wood fascia, often with strap hangers. On a metal roof, the gutter should sit low enough that fast-moving water and sliding snow clear the front lip. That detail has its own page: gutters for metal roofs.

Mini gutters and small runs

Small aluminum profiles, sometimes sold as mini gutters, are used over doors, on bay windows, sheds and porches where a full 5-inch gutter would look heavy. They carry much less water, so they belong only on small roof areas. Over an entry door, a short run with a downspout to one side keeps visitors dry without changing the look of the house.

Looking after aluminum gutters

Aluminum needs little beyond keeping the troughs clear. Wash the outside once a year with a soft brush and mild detergent to keep the finish bright; avoid abrasive pads and pressure washers held close, which can strip paint. Check the joints at corners each spring and reseal them with a gutter sealant if you see drips. Tighten any hangers that have backed out before they let the run sag.

Aluminum gutter installation: choosing an installer

Ask for the coil gauge, the gutter size, the hanger type and spacing, the downspout size and the color name in writing. Ask whether the gutter will be formed seamless on site. Contractors in our network can quote aluminum systems in either gauge so you can compare the difference. For price ranges, see the gutter cost per foot page.

Sheet metal, extruded and cast aluminum

Most alum gutter is roll-formed from flat coil, so it is sometimes listed as sheet metal gutters or sheet metal rain gutters. Extruded aluminum gutters are pushed through a die instead, giving thicker walls and sharper profiles, and they show up on commercial and architectural work. Cast aluminum gutters and fittings are made in molds for heavy, decorative pieces on historic buildings. Pressed metal gutters is an older term for formed sections.

Cutting and joining aluminum gutters

Cutting aluminum gutter is done with tin snips, a fine-tooth hacksaw or a miter saw with a non-ferrous blade, followed by filing off the burr. Joining aluminum gutters is done with slip connectors or overlapping the ends by a few inches, riveted and sealed with gutter sealant. The same methods apply to joining metal gutters of other kinds, though copper is soldered and steel needs coated rivets to avoid rust. Seamless runs avoid most joints altogether.

Aluminum gutters on metal buildings and garages

Gutters on a metal building or metal garage are usually aluminum or painted steel matched to the wall panels. Installing gutters on a metal building often means fixing them to the eave strut with special brackets rather than to a wood fascia, and the roof panels need enough overhang for water to land in the trough. The gutters for metal roofs page covers snow, overhang and fastening in more detail, and the box gutters page covers built-in gutters on larger buildings. An aluminium valley gutter, a flat metal channel in a roof valley, is a roofing part rather than an eave gutter.