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

Metal roofs shed snow and ice better than asphalt because the smooth, interlocking surface doesn't give snow a foothold the way granules do. Hazel gets about 192 cm of snow annually, and that weight sits differently on aluminum than on traditional materials. The four-way interlocking panels create a unified surface so meltwater doesn't pool behind ice dams. You can add snow guards if you want controlled slides rather than sudden dumps. The lightweight design—the Slate profile at just 0.41 lb/sq ft—means your framing handles snow load stress with less strain than it would under the weight of asphalt or slate, and structural reinforcement isn't needed even with our regional snow accumulation.

No. Aluminum has no iron content, so it cannot rust even through repeated freeze-thaw cycling. Hazel experiences roughly 52 freeze-thaw days each year, a cycle that would cause steel to corrode and wood to split and curl. When aluminum oxidizes, it forms a protective oxide layer that self-heals when scratched—the metal simply doesn't degrade the way asphalt becomes brittle in freeze cycles or wood shakes warp and split. The Alunar 70% PVDF fluorocarbon coating adds another 30-year defense against environmental stress. That combination is why Interlock panels have been installed from coastal salt-air homes to an Antarctic research station since 1998.

Yes. The four-way interlocking panels resist wind speeds up to 120 mph when installed to specification, and Hazel's typical gust speeds reach about 120 km/h (75 mph) with occasional stronger events. The mechanical interlock—not adhesive, not sealant—locks adjacent panels together so wind can't lift or separate them. That's why the warranty covers the wind resistance: it's built into the system, not dependent on fastener pull-out or edge failure. A solid deck and proper fastening mean the uplift forces that would peel back asphalt shingles simply transfer through the metal into the framing. In a region where wind can exceed 10 km/h on typical days, that engineered resistance translates to zero worry about storm damage.

Interlock aluminum roofing 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. That rating matters for insurance: many carriers recognize Class 4 impact performance and offer discounts because claims are rare. Aluminum dents but doesn't perforate under normal hail, and dents don't compromise the roof's function or allow leaks. Compare that to asphalt shingles, which crack and lose granules in hail, or wood shakes, which split. A Class 4 roof often qualifies for a discount that pays back a portion of the installation cost over the years you own the home. Even without a discount, the durability means you're not filing a claim for a $5,000 replacement after a single storm.

Almost certainly yes, and the lightweight design of aluminum is why. The Interlock Shake profile installs at roughly 0.58 lb/sq ft, and the Mediterranean Tile—which replicates the look of heavy concrete or clay tile—weighs about 0.59 lb/sq ft but is approximately 96% lighter than the real thing. Your framing was built to support asphalt shingles, which are heavier, so an aluminum roof actually reduces structural stress. No reinforcement is needed, and the system installs directly over most existing roofs, saving you the cost and mess of a tear-off. That light weight becomes an advantage in a region like Hazel where 192 cm of seasonal snow adds significant load; distributing that weight over a lighter roof assembly means less overall strain on your home.

Aluminum contains no iron—iron is what rusts. The roofing-grade 3105-H24 and 3003-H24 aluminum alloys used in Interlock panels (ASTM B209) are naturally corrosion-resistant. When exposed to air and moisture, aluminum develops an oxide layer that protects the underlying metal and actually self-heals if scratched. Steel roofing, by contrast, requires paint or coating to prevent rust, and once that coating is breached, oxidation spreads. The Alunar 70% PVDF fluorocarbon finish applied to both sides of every panel adds extra defense, especially valuable in salt-air environments or regions with heavy rainfall like Hazel's 1744 mm per year. That dual-coat system is backed by a 30-year warranty against chalking and fading. You're buying corrosion immunity, not just a corrosion-resistant coating that can eventually fail.

Far less than asphalt or wood. Asphalt shingles require regular inspections, granule replacement touch-ups, and periodic repairs of loose or curling sections—and all of that accelerates after about 15 years. Wood shakes need treatment, annual cleaning, and individual replacement of split or rotted pieces. Aluminum doesn't split, rot, curl, or lose protective material. Twice a year, clear leaves and debris from valleys and gutters, and rinse the roof with a garden hose if heavy dust accumulates—both chores you'd do anyway. The ICC evaluation ESR-1790 notes that Interlock systems are CALGreen-verified for reduced maintenance. After 1744 mm of annual rainfall and 192 cm of snow, your aluminum roof is self-cleaning; the water just runs off. No repairs, no sealant reapplication, no granule top-ups.

When you calculate the full lifecycle cost, metal is the last roof you buy. Asphalt shingles cost less upfront but need replacement every 15–20 years; over a 50-year ownership span, you're buying and installing new shingles twice more—two tear-offs, two disposal fees, two installation projects. Interlock aluminum carries a lifetime limited material warranty for the original owner with a one-time transferable 50-year term for the next owner, meaning it outlasts asphalt by decades. Factor in zero maintenance, no repairs, no insurance claims from impact damage (UL 2218 Class 4), and potential insurance discounts, and the amortized cost per year drops below asphalt. Right now, Interlock Metal Roofing is offering no payments and no interest until Spring 2027 or 10% off installation—terms that make the upfront difference manageable while you're planning a roof that won't need replacement in your lifetime.

The Guardian lifetime limited warranty covers the original owner for the life of the roof against rusting, rotting, splitting, cracking, curling, and loss of impact resistance. It's non-prorated, meaning there's no sliding scale: you're covered at full value throughout your ownership. The warranty is also one-time transferable to the next owner, who receives 50 years of coverage from the date of completion. That's a powerful resale advantage because buyers know they're inheriting a roof with decades of protection left. The coating itself carries a separate 30-year warranty against chalking and fading, measured to ASTM standards. Combined with the four-way interlocking system designed to ICC-ES ESR-1790 standards and the aluminum's inherent non-corrosive properties, you're buying durability backed by real promises, not marketing language.

Interlock Metal Roofing (PNW) Inc. has served Snohomish County and the surrounding region since 1997—longer than most roofing contractors have been in business. They know Hazel's weather patterns, building codes, and what works in a climate that delivers about 1744 mm of rain and 192 cm of snow annually. They're the same crew that installs the system correctly over existing roofs without structural reinforcement and can walk you through the full process from inspection to completion. Right now they're offering financing—no payments and no interest until Spring 2027—or 10% off installation. Having a local installer who knows the product and your region means faster service, accountability, and the confidence that your roof is installed to specification with proper underlayment and fastening for Hazel's conditions.

Yes. Hazel averages about 192 cm of snow, 1744 mm of rain, roughly 52 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.