How long do galvanized gutters last?

Often around 20 years, longer in dry climates and when kept clean, shorter at the coast or where leaves sit wet in the trough.

Is Galvalume better than galvanized steel?

In most conditions, yes. Its aluminum-zinc coating usually outlasts plain zinc galvanizing, and it suits metal roofs well.

Are stainless steel gutters worth it?

On coastal buildings and modern designs where looks and life both matter, they can be. For most homes, aluminum or Galvalume gives better value.

Do zinc gutters rust?

No. Zinc forms a protective patina instead of rust, but it can be damaged by acidic runoff from cedar shingles and by contact with copper.

Materials

Steel, Galvalume, Stainless and Zinc Gutters Compared

Before aluminum took over, most gutters were galvanized steel. Steel and zinc are still the right answer in some places: snowy mountain towns, steel buildings, modern architecture and historic restorations. Each of these metals behaves differently.

Updated 2026-10-26 · Gutter Fixing Editorial Team

Steel gutters are stronger than aluminum gauge for gauge. They resist denting from ladders, hail and falling branches, and they carry heavy snow and ice without bending. The weakness of steel is rust, so every steel gutter depends on a coating. Zinc is different again: it is a soft metal that protects itself with its own patina. This page explains the main options so a quote makes sense.

Galvanized rain gutters

Galvanized gutters are steel coated with zinc. The zinc corrodes slowly in place of the steel, so the gutter stays sound until the coating is used up. That can take 20 years or more in dry climates and much less where leaves sit wet in the trough, at the coast, or where the coating was scratched during installation. Rust usually starts on the inside of the gutter and at cut ends and seams.

Galvanized steel is still common on older homes, farm buildings and commercial work. It is available painted or as plain metal. Galvanized half-round gutters are popular for farmhouse and industrial looks, often left unpainted so they weather to a soft grey.

Galvalume gutters

Galvalume is steel coated with an alloy of aluminum and zinc. It combines the barrier protection of aluminum with the self-sacrificing protection of zinc, and in most conditions it outlasts plain galvanized steel. It is widely used for metal roofs and metal buildings, so Galvalume rain gutters are a natural match there. Like galvanized steel, it can be bought painted in standard colors.

Galvalume does not like wet concrete, mortar or lime, and it should not sit in contact with copper. Ask the installer how runoff and contact points are handled if any of those are present.

Stainless steel gutters and rain gutters

Stainless steel gutters resist corrosion through the chromium in the metal itself rather than a coating. They are very strong, last a long time and suit coastal buildings, commercial roofs, and modern designs where a bright metal finish is wanted. They cost much more than galvanized steel and are harder to cut, form and join, so fewer residential contractors work with them. Stainless gutters are often soldered or welded rather than sealed.

Zinc gutters and zinc guttering

Zinc gutters are common in Europe and growing in popularity in American custom homes. Zinc starts as a bright metal and weathers to a soft blue-grey patina. Pre-weathered or aged zinc is supplied already dulled, so the color is even from day one. A zinc system can last for many decades, and it is soldered like copper.

Zinc has particular needs. It must be installed with ventilation behind it, kept away from copper runoff and acidic cedar shingles, and it is brittle when cold, so forming is done in mild weather. Installers who know zinc are usually specialists. Ask about their past zinc jobs before booking.

Comparing the metals

Metal	How it resists corrosion	Strengths	Watch for
Galvanized steel	Zinc coating sacrifices itself	Strong, affordable, classic look	Rust once coating wears, esp. at seams
Galvalume	Aluminum-zinc alloy coating	Longer life than galvanized, matches metal roofs	Contact with concrete, mortar, copper
Stainless steel	Chromium in the metal	Very durable, coastal tolerant	High cost, few installers
Zinc	Self-forming patina	Long life, architectural look	Needs specialist install, sensitive to acids

Where steel makes more sense than aluminum

Heavy snow regions, where sliding snow and ice dams would bend aluminum.
Steel buildings, barns and shops, where steel gutters match the roof and wall panels.
Hail-prone areas, where a thicker steel gutter survives impacts better.
Commercial work with large roof areas and wide box gutters.
Homes where a dark weathered or bare metal finish is part of the design.

Specialty steels: weathering and bonderized

Weathering steel, often called Corten, develops a stable rust-colored surface on purpose. It is used for dramatic architectural gutters and rain chains. Runoff carries rust stains for the first few years, so it needs careful drainage design away from light surfaces. Bonderized steel has a phosphate treatment that weathers to a dark grey and is used where a raw industrial look is wanted. Both are niche choices that need an installer who has used them before.

Looking after steel gutters

Keep steel gutters clear, because wet leaves sitting against the coating are the fastest way to rust. Touch up scratches and cut ends with a zinc-rich paint. Check the inside of the trough for orange spots each spring; small rust spots can be cleaned and coated, but rust holes usually mean the run needs replacing. Contractors in our network can tell you whether a steel gutter is worth repairing or should be replaced.

Steel building gutters

Pre-engineered steel buildings usually come with gutters and downspouts made from the same painted steel as the wall panels. They are fastened to the eave strut with straps, sized for the large roof planes such buildings have, and often drain through big rectangular downspouts. When these gutters rust out or are damaged, replacement pieces in matching color can usually be ordered by the building's panel profile and color name. For a shop or barn with a metal roof, the gutters for metal roofs page covers how the gutter should line up with the roof edge.

Questions to ask about a steel or zinc quote

Which coating or alloy is the gutter made from, and what thickness?
Will seams be sealed, riveted, soldered or welded?
What fasteners and hangers are used, and are they compatible with the gutter metal?
How are cut ends protected from corrosion?
Has the installer worked with this metal on similar buildings before?

Galvanized, tin and black steel guttering

Galv guttering, short for galvanized, is steel with a zinc coating; in British spelling it is galvanised, and galvanised box guttering is common on older commercial buildings. Tin guttering is an older term for thin steel or terne-coated gutters; most rain gutters for tin roofs today are galvanized or painted steel to match the panels. Black steel guttering is painted or powder-coated steel, popular on modern farmhouse styles.

Valley gutters in steel and zinc

A stainless steel valley gutter or zinc valley gutter is a channel set into the valley where two roof slopes meet, not an eave gutter. It is part of the roof, installed by roofers, and needs to be wide enough for heavy flow. Zinc valleys are used on high-end slate and metal roofs and age to the same grey as zinc eave gutters.