Straight answers, up front

More upfront than asphalt, less over the life of the house. Oregon pricing reflects complex rooflines, steep moss-softened tear-offs, and regional labor. Because asphalt west of the Cascades typically lasts only 15–25 years — less where moss takes hold — one lifetime aluminum roof competes with two to three asphalt replacement cycles. See our cost page for honest regional ranges.

You are buying the roof once instead of two to four times. Premium aluminum material, four-way interlocking engineering, and lifetime-grade installation cost more on day one — and remove every future re-roofing bill, tear-off, and disposal fee for the life of the home.

Request a free assessment. In about 30 minutes on site we measure your roof, review pitch, condition and profile options, and give you a fixed, transparent number — no high-pressure sales, no expiring 'today-only' discounts.

Yes. Interlock Metal Roofing Oregon offers financing on approved credit — rates as low as 9.9% APR — with monthly, bi-weekly, or weekly payment options — with every term disclosed up front, in writing, before you sign.

Rates start as low as 9.9% APR and depend on credit quality; your exact rate is disclosed in writing before you sign. Unlike some competitors, there is no promotional-period trap that resets to a high double-digit rate — the terms you see at signing are the terms you keep, and our full Financing & Promotional Disclosures policy is published on this site.

Seasonal promotions periodically include 0% financing for the first year on approved credit, with a 10% down payment. Promotional offers cannot be combined, and complete terms are disclosed before purchase.

Yes. The Guardian Warranty — the Guardian Lifetime Limited Material Warranty — transfers once to the next owner when you sell your home — which is why an Interlock roof functions as a listing feature, not just a repair.

It is engineered and warranted as the last roof the house needs: The Guardian Warranty — lifetime coverage, transferable once (extending 50 years of coverage to the next owner). We have installed the system for Pacific Northwest homeowners since 1997.

Read the fine print — some metal roofing warranties carve out or restrict coverage for homes within a set distance of salt water, which is precisely where you need the coverage most. The Guardian Lifetime Limited Material Warranty on our aluminum systems applies on the Oregon Coast: lifetime coverage for the original owner, transferable once, with wind warranted to 120 mph installed to manufacturer specification, and the Alunar® coating warranted 30 years. Ask any contractor you're comparing the same question.

They remove what moss needs. Moss roots into asphalt's granular, moisture-holding surface; a smooth PVDF-coated aluminum panel holds neither the moisture nor the grit, so growth washes off with the rain instead of colonizing the shaded slope. That ends the wash-treat-repeat cycle — and the granule loss every cleaning inflicts on asphalt. We still check shade, debris, and attic ventilation on every estimate, because a healthy roof is the whole assembly.

Aluminum cannot rust — full stop. That is the decisive difference from steel (including stone-coated steel), which corrodes at scratches and cut edges. From Astoria to Florence, our coastal installs carry the same warranty as inland ones, with a PVDF (Kynar 500-family) Alunar finish rated for salt-air exposure.

That's what it's engineered for. North coast winter storms have produced gusts to 91 mph (147 km/h) in Clatsop County, and four-way interlocked panels leave no free edge for that wind to catch. The system is documented under ICC-ES ESR-1790 with wind uplift resistance to 177.5 psf and carries a written 120-mph (193 km/h) wind warranty, installed to manufacturer specification. After named storms, the calls we get from the coast are from asphalt owners.

Yes. Aluminum is non-combustible, and Class A fire-rated assemblies — the highest rating — are available (ASTM E108, installed with GAF VersaShield per ICC-ES ESR-2053). For Oregon homeowners hardening a home against wildfire, the roof is the largest single surface you can make non-combustible.

Yes — arguably the best-matched metal for this climate. Aluminum cannot rust in coastal salt air, its smooth finish sheds the moss that colonizes asphalt west of the Cascades, it weighs only about 0.41 lb per square foot, and Class A fire-rated assemblies are available for wildfire-exposed homes. Our documented installs across Oregon since 1997 are the proof.

For most of the state's housing stock, yes. Shingle-size panels lock on all four edges with concealed fasteners — no exposed seams for wind-driven winter rain, no free tabs for Gorge or coastal gusts — in traditional profiles that read correctly on a Portland foursquare, a Willamette Valley farmhouse, or a coastal shingle-style home. Full product specifications for the aluminum shingle system are published by the manufacturer at interlockroofing.com; this page covers the regional decision: fit, cost logic, and our Oregon install record.

Slate and Cedar Shingle panels carry a full-length nailing tab across the top edge, pre-punched for four fasteners driven directly into the roof deck — not a single corner tab, and no separate clips. Each panel is anchored to the decking at four points across its width and then locked to its neighbors on all four sides, which is the combination behind the warranted 120 mph wind rating (installed to manufacturer specification).

Interlock Roofing Ltd., which manufactures interlocking aluminum roofing systems in North America — ICC-ES ESR-1790 listed, UL 2218 Class 4 impact rated, verified via Intertek, with the AAMA 2605-certified Alunar® coating and ~95% recycled aluminum.

Apply seven checks: documented installs with real locations, a transferable lifetime warranty with a written wind rating that stays valid on the coast, an active CCB license you've verified at oregon.gov/ccb, concealed fasteners, third-party reviews (Google, BBB, GuildQuality), a named manufacturer with ICC-ES documentation, and straight answers on wildfire hardening and moss.

The four highest-signal questions: Can I see documented installs near me? Is the warranty prorated, does it transfer, and is it fully valid on the coast? Are the fasteners exposed or concealed? Who manufactures the panels, and what's the ICC-ES report number? Confident answers to all four are rare — and telling.

Yes — and normalize them before comparing. A cheaper quote with exposed fasteners, a prorated warranty, and a steel panel headed for a salt-air coastline isn't the same product at a lower price; it's a different (and shorter-lived) roof. Compare systems, warranties, and documentation, then price.

Interlock Metal Roofing – Oregon (legally Interlock Metal Roofing (PNW) Inc.) is Oregon's authorized installer of the Interlock® Lifetime Roofing System, headquartered at 1355 NW Everett St, Portland, OR 97209 and serving Pacific Northwest homeowners since 1997.

We have served Pacific Northwest homeowners since 1997, operating from our Portland office and backed by the system's manufacturer, Interlock Roofing Ltd.

Yes — we hold Oregon CCB license #130826, Washington license #INTERMR75406 and Idaho General Contractor Registration #6181938, which cover every roof we install in Oregon, southwest Washington and southwest Idaho. Those are our only three licenses; we don't operate outside them.