Metal Roofing in Quincy, Washington — Lifetime Interlock® Aluminum Shingles Installed Locally

Yes—aluminum thrives in freeze-thaw conditions because it has no iron and cannot rust, so the repeated expansion and contraction from Quincy's roughly 74 freeze-thaw days per year won't degrade the material. The Alunar PVDF coating on both sides of every panel resists salt air and weather stress equally, which matters here because your region gets about 210 mm of annual rainfall and up to 63 cm of snow. Aluminum's oxide layer self-heals when scratched, so minor damage from winter weather won't trigger corrosion like it would on steel or uncoated metal. That durability is why the Guardian warranty covers the entire roof for the original owner's lifetime.

Interlock's four-way interlocking system locks panels together horizontally and vertically, which braces the roof against the weight and shifting of Quincy's average 63 cm annual snowfall. The panel edges are designed to shed water and ice without trapping melt at the eaves—a major advantage over asphalt, which can ice-dam and force water under shingles. Snow guards are available if you want to retain snow on steeper pitches for insulation. Because Interlock panels are about 96% lighter than concrete or clay tile, snow loading is not a structural concern, and installation requires no reinforcement of your existing framing. The standing seam and slate profiles shed fastest; the shake and shingle profiles hold snow slightly longer if desired.

No reinforcement is needed. Interlock panels weigh just 0.41 to 0.59 pounds per square foot depending on profile—the Mediterranean Tile, for example, is about 96% lighter than the concrete or clay tile it replicates. Most Quincy homes built to support asphalt shingles (which weigh roughly 2–3 lb/sq ft) have capacity to spare. In fact, installing Interlock over your existing roof—which our local team has done since 1997 throughout the region—actually adds less weight than a new asphalt tear-off and replacement. This also saves labor and landfill impact. The engineering is governed by ICC-ES ESR-1790, and installers follow that evaluation to ensure safe fastening.

Aluminum cannot rust because it contains no iron—the element that oxidizes and corrodes in steel and iron roofing. Instead, aluminum forms a clear, invisible oxide layer that self-heals if scratched, so minor damage from branches or debris during Quincy's windy season (gusts reach about 81 km/h) won't start a rust cycle. We coat both sides of every panel with Alunar 70% PVDF fluorocarbon finish, warranted 30 years against chalking and fading, which provides an extra shield in coastal and high-moisture climates. With roughly 210 mm of annual rainfall and freeze-thaw stress, this dual-side protection means no rust blooms, no staining, and no corrosion creeping under flashings—advantages that a steel roof simply cannot match.

Yes, especially during Quincy's roughly 3,506 sunshine hours per year. energy-efficient Interlock colors reflect up to 0.55 of solar heat (measured by the Cool Roof Rating Council) and have a thermal emissivity of 0.84, meaning they absorb and then radiate heat away rather than trapping it like asphalt does. On a 63°F average day with strong sun, that reflection keeps your attic cooler and reduces air conditioning load. Over 25+ years, the energy savings compound—you're not re-roofing with asphalt every 15 to 20 years, so you avoid repeated solar heat absorption cycles. The lightweight design also allows better air circulation under the roof, further supporting natural cooling.

Interlock carries a UL 2218 Class 4 impact rating—the highest available—and the Guardian warranty even covers perforation from hailstones up to 1.5 inches. Because Class 4 is the top hail classification, many insurance carriers offer discounts on homeowners policies; you should contact your agent with this specification to ask about premium reductions. Quincy's climate brings occasional hail and wind gusts to about 81 km/h, so impact durability has real value here. Unlike asphalt, which can fracture or lose granules under hail, aluminum dents but doesn't puncture or lose performance—and even a dent doesn't affect the warranty. This combination of toughness and insurable rating makes Interlock an attractive upgrade from asphalt when discussing coverage with your insurer.

Yes, Interlock offers five profiles: Slate, Cedar Shingle, Shake, Standing Seam, and Mediterranean Tile—each with authentic texture and shadow lines stamped into the aluminum. From the street and up close, they deliver the architectural character of high-end materials. The difference is longevity and maintenance: a genuine slate roof or cedar shake can last 50–100+ years but requires ongoing upkeep and repair; Interlock panels replicate that aesthetic while the aluminum core remains corrosion-free for your lifetime. You get curb appeal without the cost and labor of sourcing slate or the rot and insect issues of real wood. The profiles are ICC-ES ESR-1790 compliant, so your choice is backed by building code recognition, not just appearance.

Yes. Interlock Metal Roofing (PNW) Inc. has served Grant County and the greater region since 1997—longer than Interlock's parent company has been manufacturing panels in Delta, BC. Our local team understands Quincy's freeze-thaw patterns, wind exposure, and the challenge of installing over existing roofs in our climate. We've installed Interlock from coastal salt-air homes to inland dry climates, so we know how the Alunar coating performs here and how to handle the roughly 81 km/h gusts typical of the region. Currently, we're offering no payments and no interest until Spring 2027, or 10% off installation—a significant incentive if you're ready to move from asphalt to a metal roof that outlasts multiple replacements.

The Guardian warranty is a lifetime limited, non-prorated material guarantee for the original owner—covering rusting, rotting, splitting, cracking, curling, and loss of impact resistance, with zero deductible. It's also one-time transferable to the next owner for 50 years from completion, a feature that adds resale appeal. Aluminum panels manufactured since 1998 have been installed in extreme conditions from coastal salt air to Antarctica, so real-world data suggests 50+ years of performance. The Alunar coating carries a separate 30-year warranty against chalking and fading. In Quincy's 210 mm rain, 63 cm snow, and 74 freeze-thaw days per year, this combination means you're buying the last roof you'll install—no asphalt tear-off cycles, no surprise failures.

Interlock requires minimal maintenance: rinse leaves and debris annually, inspect fasteners every 5–10 years, and clear gutters—standard for any roof. Asphalt shingles, by contrast, need regular moss/algae treatment in damp climates, granule replacement in worn areas, and full replacement every 15–20 years. Wood shake demands annual sealing, insect treatment, and rot monitoring. Clay or concrete tile needs mortar repair and individual tile replacement. Aluminum cannot rot, split, or crack, so you avoid those recurring costs. CALGreen certification recognizes Interlock's reduced maintenance profile, which also means fewer trips up a ladder during Quincy's wet season. Over 25+ years, the labor and material savings alone justify the upfront investment, even before considering energy efficiency or the fact that you'll never landfill this roof.

Yes. Quincy averages about 63 cm of snow, 210 mm of rain, roughly 74 freeze–thaw days a year, with peak wind gusts near 81 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.