How to Vet a Standing Seam Metal Roofer in Oregon Before You Sign

How do you check a standing seam roofer's CCB license in Oregon?

Every contractor who bids roofing work in Oregon has to hold an active license with the Oregon Construction Contractors Board, and the CCB keeps a public lookup on its website. Type the company name or license number and you get the license status, the endorsement class, the bond and insurance on file, and any complaints or disciplinary history. Do this before the first site visit, not after the deposit. Interlock Metal Roofing (PNW) Inc. is CCB #130826, and you should expect any competitor to hand you their number just as readily. The bond and liability insurance the CCB requires are minimums. On a whole-house standing seam job in Lake Oswego or the West Hills, where a single roof can run forty squares, ask the contractor for a current certificate of insurance naming you as certificate holder, and confirm workers' compensation coverage for the crew that will actually be on your roof. Oregon roofs are steep, wet, and slick from October through May, and a fall on your property by an uninsured worker becomes your problem. A contractor who hesitates at that request has told you something.

How many standing seam roofs should an Oregon installer have done, and where?

Ask for a count of completed standing seam roofs, not metal roofs in general, and ask where they are. A crew that has done sixty roofs in Bend and three in the Willamette Valley has not yet learned what 52 inches of Marion County rain does to a poorly lapped eave. Standing seam is its own trade. The panel handling, the clip layout, the hem at the eave, and the seaming at the ridge all differ from an interlocking shingle, and none of it resembles an asphalt install. Geography inside Oregon matters as much as the count. A roof in Cloverdale in Tillamook County takes 81 inches of rain and 85 mph gusts; a roof in The Dalles takes 18 inches of rain, 22 inches of snow, and 48 freeze-thaw days. The installer who has worked both ends of that range has seen aluminum expand and contract across a real Oregon year and has set their clips accordingly. Our own record, for comparison, is 374 roofs on record in Portland since 1998, 87 in Salem since 1999, and 64 in Eugene since 1998, with a 22-square black standing seam in Warren, Columbia County, documented in May 2025. Whatever the contractor's number is, it should be specific and they should be willing to show the addresses behind it.

Should the panels be site-formed or factory-made for an Oregon roof?

Standing seam panels arrive one of two ways: roll-formed on a trailer in your driveway, or manufactured in a plant and shipped cut to length. Both can produce a good roof, and both can produce a bad one, so the question is whether the proposal tells you which one you are getting. Site-formed panels are convenient on a long farmhouse roof outside Albany, where a single run may exceed shipping length. Factory-formed panels come with the coil source, alloy, and coating documented on paper, which is what a warranty claim eventually turns on. On the coast and in the Gorge, the material behind the panel matters more than where it was bent. Steel panels formed on site from a coil of unknown origin will rust at the cut edges within a few winters at Lincoln City or Seaside, and many steel warranties exclude oceanfront exposure outright. Interlock standing seam is aluminum, 3105-H24 or 3003-H24 alloy with an Alunar 70 percent PVDF finish carrying a 30-year finish warranty, and aluminum contains no iron to rust. Ask the bidder to write the alloy, the coil gauge, and the coating system into the proposal. If the answer is a brand name and a color chip, keep asking.

What seam type, clips, and fasteners should an Oregon proposal specify?

The two common seam types are snap-lock, where the panel edges press together by hand, and mechanically seamed, where a powered seamer folds the edges over once or twice after the panels are laid. Snap-lock is faster and adequate on a steep Craftsman roof in Southeast Portland with 72 mph peak gusts. A double-lock mechanical seam is the stronger choice where wind is sustained rather than gusty, which describes Hood River, Cascade Locks, and the whole Columbia Gorge, and where salt spray is a year-round condition on the Clatsop coast with gusts to 91 mph. The proposal should name the seam and the reason for it. Clips are the part nobody sees and the part that decides whether the roof survives. A standing seam panel is attached to the deck through concealed clips, and those clips must let the panel float so a 40-foot aluminum run can grow and shrink across an Oregon year without tearing its own fasteners out. The clip spacing tightens toward the eaves and corners where uplift concentrates, and the fastener metal must be compatible with the panel: stainless or coated fasteners into aluminum, never plain zinc-plated screws that set up a corrosion cell in a damp Tillamook winter. Ask for the clip type, the spacing at field, edge, and corner zones, and the fastener material, in writing. The number that ties it together is the ICC-ES evaluation report. ESR-1790, reissued in September 2025, documents Interlock's wind uplift to 177.5 psf, and ESR-2053 covers the GAF VersaShield underlayment that makes up the Class A fire-rated assembly available for homes under Oregon's SB 762 wildfire map. A proposal that cites ESR numbers gives your building inspector something to verify. A proposal that says only that the roof is rated for high wind gives them nothing.

What does a bad standing seam bid look like in Oregon?

A bad bid is short. It names a color, a square count, a price, and a start date, and leaves you to assume the rest. It does not say whether the panels are steel or aluminum, what gauge, what coating, what seam, what clip, or what underlayment. It says lifetime warranty without naming the warranty or saying who honors it. It lists no ESR numbers and no CCB number. It offers to tear off your second layer of asphalt for free without mentioning what happens if the decking underneath a 1920s Ladd's Addition foursquare turns out to be shiplap with rot at the eaves. The cure is references you can inspect yourself. Ask for three addresses of standing seam roofs at least five years old, ideally one each near Portland, Salem, and Eugene, and go look at them from the street. Look at the eave for a clean hem rather than an exposed cut edge, at the ridge for a closed seam, and along the field for oil-canning, the wavy reflection that shows when panels were laid tight or on a deck that was not flat. Some oil-canning is normal in any flat metal panel and no honest installer will promise its absence, but a roof that ripples end to end was rushed. We install Interlock through an authorized-installer model, which means the manufacturer's spec and the crew's work are the same accountable party, and that is a fair standard to hold any bidder to: one company, one spec, one warranty, all written down before you sign.

Common questions