Metal Roof Coating & Painting in Seattle, WA · Metal Roofing Alliance Member

Seattle's metal roofs take a beating that most homeowners do not see until the paint fades to chalk and the panels start bleeding rust streaks down the fascia. Between the long gray damp winters, steady rain, and atmospheric-river storms rolling in off Puget Sound, every shaded plane on a Ballard bungalow or a West Seattle rambler grows moss and algae by the second or third season. Add the tall Douglas firs and western red cedars that drop needles and hold moisture against the panels, and a factory finish that should last decades starts breaking down early. Metal Roof Coating & Painting in Seattle is how you stop that decay without tearing off a roof that still has good metal underneath. We clean, prep, treat rust, and apply a high-performance coating system that restores color and adds 10 to 15 years of service life. If your panels are sound but tired, this is the cheaper path. Call (425) 648-6332 and we will tell you straight whether coating makes sense or whether a metal roof replacement is the honest answer.

Why Seattle Metal Roofs Fade, Chalk, and Rust Before Their Time

The failure mode that dominates here is not sun. It is months of wet shade. North-facing slopes under bigleaf maples in Wallingford and Ravenna never dry out, so moss and algae hold a film of water against the paint. That film breaks down the finish, the finish lets go, and bare steel or Galvalume starts to oxidize at the cut edges and fastener washers.

• We remove moss and algae without gouging the panels or driving water under the laps.
• We treat surface rust at cut edges, scratches, and fastener heads before any coating goes down.
• We restore color on faded standing seam and exposed-fastener panels instead of leaving them chalky.
• We seal and recoat where tree debris has trapped moisture against the metal for years.

Coating buys time on a roof that is structurally sound, and it is far cheaper than replacement when the panels still have life.

Key info: A 1920s Craftsman in Ballard with a shaded north plane and cedar needles packed in the pans is the classic candidate. We cleaned and recoated one last spring after the owner assumed the roof was finished. The metal was fine. The finish was not.

Seattle roofing permits and inspection rules vary by jurisdiction, and any coating job that touches flashing or penetrations should be checked against local requirements. Start with the Seattle Department of Construction and Inspections before you commit to a scope.

How We Prep and Coat a Metal Roof in Seattle

Coating is only as good as the prep under it. On a Queen Anne Victorian or a Lake City split-level, we start with a full inspection of seams, fasteners, and flashing before a brush touches the roof. If we find active leaks or loose fasteners, we fix those first, because coating over a leak traps the problem.

1. We inspect the roof and document rust, moss, and fastener condition with photos.
2. We remove moss, algae, and tree debris with low-pressure washing and hand tools.
3. We treat rust with a converter and spot-prime bare metal at edges and washers.
4. We clean and scuff the existing finish so the new coating bonds.
5. We apply the coating system in the manufacturer's specified mil thickness and cure window.

We schedule around dry windows, because a coating applied over a wet panel in November will fail by spring.

Key info: A waterfront home on Bainbridge Island had salt-air oxidation on the west slope and heavy moss on the north. We treated the rust, coated both planes, and the owner avoided a replacement for another decade. Same story on a standing seam roof in Kirkland.

Coating Approaches We Use on Seattle Roofs

Not every panel gets the same system. Exposed-fastener corrugated roofs, standing seam, and stone-coated steel each need a different prep and product. Here is how we match the approach to the roof.

We pick the system after we see the roof, not before, because the wrong product on the wrong substrate wastes your money.

Metal Roof Coating & Painting Cost in Seattle: What to Expect

Most coating projects here start at $2.50 per square foot, and that figure covers cleaning, moss removal, rust treatment, and the coating itself on a straightforward roof. Real jobs land above that number when access is hard, when rust has spread across whole pans, or when the roof has multiple steep planes and dormers.

Roof size is the biggest driver, followed by pitch and access. A steep Queen Anne Victorian with three gables takes more labor and more fall protection than a low-slope rambler in Shoreline. Heavy moss and algae add prep time. Rust at fasteners and cut edges adds treatment time. Tree proximity matters too, because roofs under big firs and cedars come back dirtier and need more cleaning before coating.

Get two or three written estimates and compare scope, not just the bottom line. A cheap number that skips rust treatment or applies a thin coat will cost you again in two years. Our full pricing overview breaks down what each tier includes.

Hiring a Metal Roof Coating & Painting Contractor Near Me in Seattle

Coating is easy to sell and easy to do badly. Ask every contractor for their license and insurance certificate, and confirm they carry general liability and workers' comp. Get at least three estimates and read the scope line by line. Ask for references from jobs in your neighborhood, and ask whether they treated rust or just painted over it.

Check permits where they apply, especially if your home sits in a historic district or under HOA design review, since color and finish changes can need approval. Then call us at (425) 648-6332 or reach out through our contact page for a straight assessment of your roof.

We have been coating Seattle-area metal roofs since 2009 and we are a Metal Roofing Alliance Member. We will tell you when coating is the right call and when it is not.

Metal Roof Coating & Painting in Seattle: Pricing Guide

Indicative pricing, the exact cost depends on square footage, finish, and site access. Free personalized estimate within 24h at (425) 648-6332.