Metal Roofing in Tigard, Oregon — Lifetime Interlock® Aluminum Shingles Installed Locally

Aluminum cannot rust because it contains no iron. Instead, it forms a self-healing oxide layer that protects the metal even when scratched. In Tigard's wet environment—averaging 1208 mm of rain annually with 37 freeze-thaw days per year—this is critical. Steel roofing can corrode from moisture cycles, but aluminum's chemistry makes it immune. Interlock uses roofing-grade 3105-H24 and 3003-H24 aluminum alloy, plus a Alunar 70% PVDF coating warranted 30 years against fading, giving you dual protection in a climate where moisture is constant.

Tigard receives about 1208 mm of rain yearly, so your roof must shed water reliably. Interlock's four-way interlocking aluminum panels create a locked seam system that prevents water infiltration at panel edges. The panels install over solid deck with underlayment—the same water-shedding principle as asphalt shingles, not exposed fasteners. With proper installation by Interlock Metal Roofing (PNW) Inc., which has served your region since 1997, water runs off before it reaches seams. The interlocking design itself becomes your first line of defense against the Pacific Northwest's persistent rainfall.

Tigard experiences gusts up to 120 km/h, and Interlock's roof is warranted to resist winds up to 120 mph (193 km/h) when installed to specification. The four-way interlocking aluminum panels lock together mechanically, creating a unified system rather than individual shingles that can lift. Each panel's edges interlock with its neighbors, distributing wind load across the entire roof. This design earned an ICC-ES evaluation report (ESR-1790, reissued 2025) for compliance with current building codes. Even in Pacific Northwest windstorms, the interlocking prevents the progressive failure that can plague other roofing systems.

Yes. Interlock achieves UL 2218 Class 4 impact rating—the highest available—and the Guardian Warranty even covers perforation from hailstones up to 1.5 inches. Oregon insurers recognize this durability. Many homeowners see premium reductions after switching to impact-rated metal, since metal roofs outlast asphalt through multiple hail seasons without loss of protection. Tigard's average annual conditions (37 freeze-thaw days) can make asphalt brittle; aluminum maintains its integrity. Contact your insurer with Interlock's UL 2218 Class 4 rating to discuss discounts—many carriers offer them for non-combustible, high-impact roofing.

Tigard averages about 3033 sunshine hours per year. Interlock's energy-efficient colors feature thermal emissivity of 0.84 and solar reflectance up to 0.55, reflecting heat that asphalt absorbs. CCRC-rated Cool Roof colors reduce surface temperature in summer, lowering air-conditioning load. The effect is modest in mild Pacific Northwest climates—Tigard's mean is 11.2°C—but cumulative over 40+ years. Every degree of cooling savings compounds across decades. If you plan to live here long-term, the reflective coating pays dividends during summer peaks and reduces your carbon footprint year-round.

Yes. Interlock offers Class A fire classification on non-combustible aluminum—the highest fire rating available. The material itself cannot ignite. Oregon's fire codes recognize non-combustible roofing as a protective asset, especially in communities near wildland interfaces. Even in suburban Tigard, a Class A roof can lower insurance rates and may be required by municipal code or HOA. Aluminum's non-combustibility also means the roof won't contribute to flame spread or smoke production in an adjacent fire. Request energy-efficiency colors with Class A rating to maximize both energy performance and fire safety.

Metal roofing costs more upfront but outlasts asphalt by decades. Asphalt typically lasts 15–20 years in Tigard's wet, freeze-thaw environment (37 freeze-thaw cycles annually); metal roofs last 40–70 years. Over that span, you replace asphalt 2–3 times, each tear-off costing labor and landfill fees. Interlock's Guardian Warranty is lifetime limited and non-prorated for the original owner, transferable for 50 years to the next owner—eliminating replacement anxiety. When you factor in avoided labor, repeated tear-offs, and the resale premium a metal roof commands, the total cost of ownership favors metal decisively. Current promotion: no payments or interest until Spring 2027, or 10% off installation.

Interlock metal roofing is nearly maintenance-free. Unlike asphalt, it doesn't crack, curl, or lose granules in Tigard's 1208 mm of annual rain and 29 cm of snow. Unlike wood shake, it won't split or rot. Unlike tile, panels won't break if you walk on them. The Alunar 70% PVDF coating is warranted 30 years against chalking and fading (tested to ASTM D4214/D2244). Annual gutter cleaning is standard for any roof; beyond that, metal requires only occasional inspection. The Guardian Warranty covers rusting, rotting, splitting, cracking, curling, and loss of impact resistance—all failure modes that plague traditional materials. In the Pacific Northwest's damp climate, this peace of mind is invaluable.

The Guardian Warranty is lifetime limited and non-prorated for the original owner, covering material defects including rust, rot, splitting, cracking, curling, and impact loss. It transfers once to the next owner for 50 years from completion—a rare feature that boosts resale appeal. Real-world durability: Interlock has manufactured aluminum roofing since 1998 and installed everything from coastal salt-air homes to Antarctic research stations, proving performance across extreme climates. Tigard's conditions (1208 mm rain, 37 freeze-thaw days, gusts to 120 km/h) are well within aluminum's proven range. Many homeowners view this as their last roof, retiring the cycle of replacement that asphalt demands every 15–20 years.

Interlock Metal Roofing (PNW) Inc. serves Tigard and Washington County, with 27+ years of regional experience since 1997. They understand Pacific Northwest installation challenges: wet weather sequencing, ice-dam prevention, and integration with local building codes. Your installer can walk you through ICC-ES ESR-1790 compliance and help you choose profiles (Slate, Cedar Shingle, Shake, Mediterranean Tile, Standing Seam) that match your home's style and your local architectural character. Current promotion includes no payments and no interest until Spring 2027 or 10% off installation. Local expertise means faster permitting, proper warranty registration, and a familiar contact for any future questions.

Yes. Tigard averages about 29 cm of snow, 1208 mm of rain, roughly 37 freeze–thaw days a year, with peak wind gusts near 120 km/h. Interlock® aluminum roofing is wind-rated to 193+ km/h (120 mph), UL 2218 Class 4 impact-rated and Class A fire-rated, and its four-way interlocking panels shed snow and resist ice dams and freeze–thaw cracking — all backed by a lifetime limited, transferable warranty.