Last Updated: October 23, 2026
Short answer
For most Kent houses the best gutter material is seamless aluminum: it does not rust, forms on site into long runs with few joints, comes prepainted and costs least per foot installed. Copper lasts longer and costs far more. Galvanized or galvalume steel is stiffer but depends on its coating, and vinyl suits only short, simple runs.
Key takeaways
- Seamless aluminum is the default: a typical Seattle-area range of about $8 to $13 per linear foot for 5-inch, installed.
- Copper runs a national budgeting range of about $15 to $40 per linear foot installed, with seamless copper and soldered detail at the upper end or above.
- Steel gutters last as long as their coating; cut edges and seams are where rust starts in a wet climate.
- Never let copper touch aluminum or bare steel: mixed metals corrode each other in the rain.
- Material matters less than joints, hangers, fascia and pitch. A good material badly hung still fails.
The short answer for a wet climate
The best gutter material is the one that survives long wet seasons with the fewest weak points, at a price that fits the house. Gutters of Kent installs and replaces gutters across Kent and South King County, with the work done by licensed and insured contractors, and for most houses that answer is seamless aluminum. It does not rust, it is formed on site to the length of each roof edge, it comes in prepainted colors, and it costs the least per installed foot of the durable options.
The other materials each fit a specific case. Copper is a long-lived premium choice for houses where the look matters. Steel trades corrosion resistance for stiffness. Zinc and stainless are specialist materials. Vinyl is cheap and easy to handle but limited. And whichever material is chosen, the gutter fails first at its joints, its hangers and the fascia behind it, which is why gutter replacement starts with the roof edge, not the catalog.
Gutter materials compared
These ranges are budgeting context, not Gutters of Kent’s rates or a quote. Where no reliable range was found, none is given.
| Material | Strengths | Weak points in a wet climate | Joints | Budgeting range |
|---|---|---|---|---|
| Aluminum (seamless) | Rust-free, light, prepainted, formed on site | Dents more easily; corrodes where it touches copper or bare steel | Only at corners, end caps and outlets | A typical Seattle-area range of about $8 to $13 per linear foot for 5-inch, installed |
| Galvanized steel | Stiff, resists dents | Zinc coating wears; rust starts at cut edges, seams and under wet debris | Sectional laps, or seamless with special equipment | No published range here |
| Galvalume steel | Stiff, better coating than plain galvanized | Still depends on the coating at cut edges and scratches | Usually sectional | No published range here |
| Stainless steel | Does not rust, very strong | Costly; hard to form and join; uncommon on houses | Soldered or mechanical | No published range here |
| Copper | Very long-lived; patinas; soldered joints | Cost; must not touch aluminum or steel; staining below | Soldered | A national budgeting range of about $15 to $40 per linear foot installed, with seamless copper and soldered detail at the upper end or above |
| Zinc | Long-lived; self-protecting patina | Cost; specialist installation; sensitive to some acidic runoff | Soldered | No published range here |
| Vinyl | Cheap, light, no rust | Expansion, cold brittleness, many gasketed joints | Every section | No published range here |
Aluminum: why it is the default
Aluminum is the standard residential material for practical reasons. A seamless gutter machine forms it from a coil of prepainted metal into one continuous run per roof edge, so the long stretches have no section joints. Residential coil is commonly about .027 inch thick, with .032 inch as the heavier option where ladders, branches or sliding snow could dent it. It weighs little, so hidden hangers into sound fascia carry it easily, and its baked finish means the color goes all the way along without painting.
Its limits are denting and mixed metals. Aluminum does not rust, but it corrodes where it touches copper or bare steel, or where copper-bearing water runs onto it, so fasteners and flashings have to be compatible. Within those limits, it handles a wet climate well. See seamless gutters for how it is formed and hung, and seamless vs sectional gutters for why the joints matter.
Galvanized and galvalume steel
Steel gutters are stronger and stiffer than aluminum, so they resist dents and hold their line between hangers. Their durability comes from the coating. Galvanized steel is coated in zinc, which corrodes slowly in place of the steel; once that layer wears through, the steel rusts. Galvalume uses an aluminum and zinc alloy coating that generally holds up better. In both, the weak points are the cut edges at end caps and miters, scratches from installation, and the bottom of the trough where wet needles and moss sit for months.
Kent’s rain pattern bears on that. NOAA climate normals for the Kent station average 96.7 days a year with at least a tenth of an inch of rain, so a steel gutter’s coating spends much of the year wet. Homeowners in Pacific Northwest forums report choosing galvalume for its dent resistance, which is a fair reason; the tradeoff is weight, harder on-site forming and a coating to protect. The moss in gutters guide explains why trapped debris shortens a steel gutter’s life.
Stainless steel
Stainless does not rust and is very strong, but it is expensive, hard to form and difficult to join neatly, so it is rare on houses. It shows up more in commercial and specialty work where a long service life justifies the cost. Stainless mesh is far more common as a guard material than stainless as a gutter; the fir needle guard guide explains why.
Copper
Copper gutters are a long-lived premium material. They weather from bright metal to brown and eventually a green patina, use soldered joints that can outlast sealed ones, and suit half-round profiles on older or period houses. They cost far more: a national budgeting range of about $15 to $40 per linear foot installed, with seamless copper and soldered detail at the upper end or above. Copper must not touch aluminum or bare steel, and its runoff can stain masonry and siding below. Copper gutters and half-round gutters cover the work.
Zinc
Zinc forms a protective patina and, like copper, is soldered rather than sealed. It is a specialist material that needs installers experienced with it. Zinc is sensitive to acidic runoff, such as water draining off some wood shake roofs, and to being sealed against damp surfaces where it cannot dry, so the roof above and the details behind it matter. Where zinc is wanted, confirm the installer’s experience with it before anything else.
Vinyl
Vinyl gutters are light, inexpensive and sold in 10-foot sections that clip together with gasketed connectors, which makes them popular for do-it-yourself work. Their limits show up on a full house in heavy rain: every section joint is a potential leak, vinyl expands and contracts noticeably with temperature and needs room at each joint to do it, and it can turn brittle in a cold snap. Snow is light here, with NOAA’s SeaTac normal at 6.3 inches a year, but the rare ice event is when brittle vinyl cracks. Vinyl fits a shed, a carport or a short run; see gutters on garages and sheds.
Fascia gutters
A fascia gutter is a profile whose flat face doubles as the fascia, so the gutter covers the board it hangs on and reads as part of the trim. It is usually formed from aluminum or steel. The appeal is a clean, built-in line; the catch is that the board behind is hidden, so rot can progress unseen, and replacing the gutter means dealing with the trim it forms. Where a house has fascia gutters, the board behind them deserves the same check any gutter and fascia repair starts with.
Mixed metals and the roof above
Two metals in contact with rainwater between them corrode, and the less noble one loses. In gutters that usually means aluminum next to copper, or galvanized steel next to copper. It also covers what runs off the roof: copper flashing, copper-based moss treatments or a copper roof feature draining into an aluminum gutter will corrode it over time. Match fasteners, hangers, downspouts and flashings to the gutter, and ask what metals sit upstream on the roof.
Kent has no marine shoreline, and no local corrosion data was found, so salt air is not a factor for most of the area. For waterfront homes in nearby Des Moines on Puget Sound, material choice is worth discussing conditionally, case by case.
How to choose for your house
Start with what the house needs, then pick the material:
- Most houses: 5-inch or 6-inch seamless aluminum in a color that matches the trim. The gutter size guide covers 5 vs 6 inch.
- Dents are a real risk from ladders, branches or snow sliding off a metal roof: heavier-gauge aluminum, or steel with a good coating.
- An older or period house where looks matter: copper, often half-round.
- A shed or short outbuilding run: aluminum or vinyl.
Material is one decision among several. Joints, hanger type and spacing, outlet placement and where each downspout lets go decide how well any material works. How long gutters last compares service life by material, and the cost guide breaks down pricing. When you are ready, Get an Estimate.
Questions about your own house? Call (253) 352-5321 or get an estimate.