Oregon · Aluminum roofing · Made in North America

Aluminum roofing in Oregon

We install Interlock® aluminum roofs in Oregon on Craftsman bungalows, mid-century ranches and coastal homes, and for condo associations: interlocking panels that don't rust or rot, locked on four sides with the fasteners out of the weather. 1,632 completed in Oregon since 1997, made in North America, priced in writing after one visit.

Reviewed by Scott Plumptree, Director of Marketing, The Interlock Group · Updated October 7, 2026

Get a free quote (503) 966-2948

Oregon roofs

1,632 completed since 1997

From our job book, town by town.

The metal

Aluminum doesn't rust

An oxide film protects it; there's no steel inside to corrode.

The warranty

Guardian Lifetime Limited Material Warranty

Material and finish, original purchaser, transferable once.

What an Interlock® aluminum roof is

An Interlock® roof is made of interlocking aluminum panels, each locked to its neighbors on all four sides with the fasteners concealed under the panel above. Nothing is screwed through the weather surface. The panels are stamped to look like slate, cedar shingle, shake or tile, or rolled as standing seam.

Made in North America: the panels are manufactured by Interlock Roofing at its plant in Delta, BC. In Oregon they are installed by Interlock Metal Roofing (PNW) Inc., the certified and exclusive Interlock® roofing contractor in Oregon, Washington and Idaho, from our Portland office.

Aluminum roofs we've installed in Oregon

Recent Interlock® roofs installed in Oregon by our own company. Tap a roof to see all of its photos.

See more Oregon roofs in the gallery

Why aluminum, for a roof in Oregon

Salt air can't rust it

Aluminum forms a thin oxide film that blocks further oxidation (ASM International). There is no steel inside an aluminum panel for salt spray on the Oregon coast to reach, so there is no red rust at cut edges or fastener holes.

It's light

Aluminum is about one-third the density of steel (ASM International). Interlock aluminum panels weigh roughly 0.4 to 0.7 lb per square foot installed, depending on profile, a fraction of concrete tile or natural slate.

Rain and moss have nothing to rot

Wood and asphalt take on water through months of rain, and moss holds moisture and debris against them (Oregon State University Extension). Aluminum absorbs no water and can't rot, and interlocked panels have no shingle tabs for moss or wind to lift. Moss can still settle on a shaded roof, so keep it and the gutters clear.

Snow slides

Smooth aluminum sheds snow in the Gorge, the foothills and on a snowy Portland winter day rather than holding it. Where a slide would land on an entry, deck, walkway or driveway, we plan snow guards at the estimate.

The profiles, and what homeowners in Oregon choose

Five aluminum profiles: Slate (the most popular), Cedar Shingle, Shake, Mediterranean Tile and Standing Seam, plus solid copper for bays, porches and accents. Nine colors: Solid Copper, Copper Penny, Hunter Green, Black, Deep Charcoal, Musket Grey, Tile Red, Colonial Brown and Tudor Brown. Every profile needs a minimum 3/12 slope.

Across our Oregon job book the most common profiles are Slate (651), Original Shingle (390), Cedar Shingle (186). Original Shingle is the first Interlock shingle profile, no longer made; today's choices are the five above. Slate and Cedar Shingle suit Craftsman bungalows, Old Portland foursquares and Victorians; on a historic house, check with your local historic landmarks commission before you choose.

What's covered, in writing

Guardian Lifetime Limited Material Warranty, from the manufacturer: material and finish, for as long as the original purchaser owns the home, transferable once (the second owner is covered to 50 years from substantial completion). Workmanship is excluded, and ice damming is a stated exclusion.
30 Year Alunar® Coating Warranty on the finish.
Wind resistance warranted to 120 mph when installed to manufacturer specification.
Class A Fire Rated Available, as a complete assembly: two layers of GAF VersaShield® over 15/32-inch plywood, per ASTM E108 / UL 790.

How a roof gets done

From first call to finished roof
Step	What happens
1. Consultation	At your home or over Zoom. We go through profiles and colors, look at photos of roofs like yours, and answer questions.
2. Measure and inspect	We measure the roof and check what's on it now. Cedar, concrete tile and natural slate always come off; a single layer of asphalt can be roofed over only if the inspection finds it suitable.
3. A written price after your roof consultation	Anything the inspection finds goes into the written quote before you sign, not into a change order later.
4. Installation	Installed by our own company to the manufacturer's specification, with flashing, ventilation and snow guards as planned.
5. After the job	The Guardian material warranty is issued by the manufacturer, and our Pacific Northwest service team handles any call after the job.

Where we work

1,632 completed Interlock® roofs in Oregon since the company was founded in 1997, recorded town by town in our job book. 87 towns have their own page with their install record. We serve Oregon and southwest Washington.

Questions, answered

Who installs aluminum roofing in Oregon?

Interlock Metal Roofing (PNW) Inc., the certified and exclusive Interlock® roofing contractor in Oregon, Washington and Idaho, installs the Interlock® aluminum roofing system from our Portland office, serving Oregon and southwest Washington. The company was founded in 1997 and installs every roof itself. Call (503) 966-2948.

Is aluminum roofing good for the Oregon climate?

Aluminum doesn't rust, absorbs no water and can't rot, so months of rain have nothing to soak, and its smooth surface sheds snow. Moss can still settle on a shaded roof of any kind, so keep the roof and gutters clear. Ice dams are a different matter: they come from heat loss into the attic and from ventilation, no roof stops them on its own, and ice damming is a stated exclusion of the material warranty.

Is aluminum roofing a good choice on the coast?

Yes. Salt air attacks steel wherever its coating is cut or scratched. Aluminum has no steel to rust: its own oxide film protects it, which is why it suits homes on the Oregon coast, from Astoria and Seaside to Lincoln City and Florence.

Is an aluminum roof better than a steel roof?

They are both metal roofs, but steel depends on its zinc or aluminum-zinc coating to keep from rusting, and aluminum has no steel to rust. Aluminum is also about a third the weight. Steel roofing usually costs less up front. Our steel vs aluminum guide sets out the differences.

How much does an aluminum roof cost in Oregon?

It depends on the roof's area, pitch and complexity, what comes off, the profile and options such as the Class A Fire Rated Available assembly. Our metal roof cost guide shows real price ranges from our own Oregon and Washington contracts, as a rough guide only: prices vary job to job with structural and other conditions, and a roof consultation is required for accurate pricing. You get a written price after your roof consultation, which is free.

Can an aluminum roof go over my asphalt shingles?

Sometimes: a single layer of asphalt can be roofed over only if our inspection finds it suitable. Cedar shakes, concrete tile and natural slate always come off first.

Is an aluminum roof noisy in the rain?

Installed over a solid roof deck and underlayment, as residential Interlock roofs are, it isn't the drumming of bare metal on an open-framed barn. The deck and underlayment are what make the difference.

How long does an aluminum roof last?

Aluminum has been known to last over 100 years. That is a property of the metal, not a promise; what is in writing is the Guardian Lifetime Limited Material Warranty and the 30 Year Alunar® Coating Warranty.

Sources

Product specifications are the manufacturer's (Interlock Roofing). Install counts are from our own job book. Reviewed by Scott Plumptree, October 7, 2026.

Get your aluminum roof priced.

A written price after your roof consultation, at your home or on Zoom. Interlock Metal Roofing (PNW) Inc. · 1355 NW Everett St, Portland, OR 97209