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

Yes—aluminum's non-rusting nature makes it ideal for freeze-thaw cycling. The Dalles experiences about 48 freeze-thaw days annually, which degrades asphalt and causes wood to split and curl, but aluminum simply expands and contracts without corrosion or material breakdown. The oxide layer that forms on aluminum actually self-heals when scratched, so winter moisture and salt spray cause no rust. Combined with the Alunar 70% PVDF coating (warranted 30 years against chalking), your roof remains structurally sound through decades of temperature swings.

Metal roofing sheds snow and ice far more effectively than asphalt. The Dalles averages about 56 cm of snow yearly, and the smooth, slippery surface of metal panels (especially Standing Seam) prevents ice dam buildup that traps melt-water under shingles. The four-way interlocking design creates a unified panel system with no gaps for water to seep through. Snow guards are available if you want snow to stay put for visual appeal or to protect plantings below. This design means no ice-dam leaks even during The Dalles' typical thaw cycles.

Aluminum cannot rust because it contains no iron—the element that oxidizes when exposed to moisture. Your Interlock roof uses roofing-grade 3105-H24 and 3003-H24 aluminum alloy (ASTM B209), the same material trusted in coastal salt-air installations from BC to Antarctica. Even if scratched, aluminum's protective oxide layer self-heals. The Alunar 70% PVDF coating on both sides adds an extra barrier against The Dalles' ~449 mm annual rainfall and occasional salt-laden wind gusts up to 84 km/h. Steel roofing, by contrast, rusts within years in these conditions.

Yes. The Dalles receives about 3,430 sunshine hours per year, and energy-efficient Interlock colors with thermal emissivity of 0.84 and solar reflectance up to 0.55 reflect heat that asphalt shingles absorb and transfer into your attic. This reduces air-conditioning load in summer and can lower utility bills. The Cool Roof Rating Council verification confirms the reflective performance. Because metal conducts heat away from living spaces faster than asphalt, even uninsulated installations feel cooler—and properly vented installations gain even more efficiency. Over a 50+ year roof life, energy savings compound significantly.

No. Interlock metal roofing is extraordinarily lightweight—the Mediterranean Tile profile, which visually replicates heavy clay or concrete tile, weighs only about 0.59 lb/sq ft and is roughly 96% lighter than the real thing. This means you avoid the costly structural reinforcement that traditional tile demands. Most homes can install a metal roof directly over existing asphalt shingles without any framing upgrades. This also reduces installation labor, material waste, and the landfill impact of a tear-off. The lightweight design makes sense in The Dalles, where snow loads of 56 cm per year add strain—metal roofing distributes loads evenly without burdening your structure.

The Guardian Warranty covers your roof for the lifetime of the original owner—non-prorated—against rusting, rotting, splitting, cracking, curling, and loss of impact resistance. One owner can transfer it to the next, extending coverage for 50 years from completion. The Alunar 70% PVDF coating is separately warranted for 30 years against chalking and fading (ASTM D4214 and D2244 measured). With proper care, an Interlock roof easily outlasts multiple asphalt replacements. Installed since 1998 in Delta, BC and deployed from coastal homes to Antarctic research stations, the product proves reliable across extreme climates far harsher than The Dalles' ~12.4°C mean temperature.

Interlock manufactures five profiles: Slate, Cedar Shingle, Shake, Standing Seam, and Mediterranean Tile. Each replicates a traditional roofing look using four-way interlocking aluminum panels in roofing-grade alloy. Slate and Standing Seam suit modern or contemporary homes, while Cedar Shingle and Shake echo Craftsman and farmhouse aesthetics. Mediterranean Tile brings Old World elegance. All are available in multiple colors and all five profiles are installed in The Dalles and surrounding Wasco County. Your choice depends on your home's architectural style and your preference for profile depth and shadow line—each delivers authentic visual appeal with aluminum's modern durability.

Metal roofing requires far less maintenance than asphalt or wood. Asphalt shingles need frequent inspection for curl, algae, and granule loss; wood shakes demand regular cleaning and treatment to prevent rot and splitting. Interlock metal roofing, with its non-rusting aluminum and 30-year Alunar coating, simply requires occasional debris removal and gutter cleaning—the same basic care any roof needs. With The Dalles averaging 449 mm of rain and 56 cm of snow per year, self-healing oxide layer and four-way interlocking panels shed moisture without pooling or algae growth. No replacement shingles, no repairs for rot or curling. CALGreen verification confirms reduced maintenance burden over the roof's life.

Yes. Aluminum is non-combustible and Interlock offers Class A fire classification (the highest rating available), exceeding most local fire codes. Wasco County sits in a region where fire safety matters, and metal roofing eliminates the primary ignition source that wood shakes and asphalt shingles present. The ICC-ES evaluation report ESR-1790 (reissued 2025) confirms compliance with IBC and IRC fire safety standards. Combined with non-rusting aluminum that never deteriorates and a coating system rated for 30 years, you get both immediate fire protection and long-term peace of mind. Insurance companies often recognize this advantage.

Installation timeline depends on roof size and complexity, but most residential projects in The Dalles complete within one to three weeks. A major advantage: Interlock roofing installs directly over most existing asphalt roofing—no tear-off required. This saves labor costs, eliminates landfill waste (aluminum is ~95% recyclable), and reduces project disruption. Your existing roof becomes a solid deck and sound barrier, so rain noise stays minimal. Interlock Metal Roofing (PNW) Inc. has served this region since 1997 and understands local code and climate requirements. Current promotion offers no payments and no interest until Spring 2027 or 10% off installation.