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

Yes—aluminum's light weight (the Slate profile installs at just 0.41 lb/sq ft) means no structural reinforcement is needed, and the smooth interlocking panels shed snow and ice far more reliably than asphalt. With about 150 cm of snow falling annually in your area and 88 freeze–thaw days per year, that shedding action is critical: it prevents ice dams from forming and the water damage they cause. You can add snow guards if you want to control where snow releases, but the metal itself won't trap moisture or deteriorate from the freeze-thaw cycle the way traditional materials do.

Aluminum thrives in freeze-thaw climates because it has no iron content—it cannot rust, and its oxide layer self-heals when scratched. Cashmere experiences about 88 freeze–thaw days annually, a cycle that cracks asphalt, causes wood to split, and deteriorates concrete tile. Aluminum expands and contracts without losing structural integrity or surface protection. The Alunar 70% PVDF fluorocarbon finish (applied to both sides and warranted 30 years against fading) doesn't crack or peel as freeze-thaw stress accumulates, so your roof stays watertight year after year through the seasonal swings.

No—Interlock roofs are made from roofing-grade 3105-H24 aluminum alloy, which contains no iron, so rusting is physically impossible. Steel metal roofs can rust; aluminum cannot. This matters in Cashmere, where you average about 360 mm of rain per year and snow that melts into runoff. The Guardian Warranty explicitly covers rusting for the lifetime of the original owner. What you get instead is a stable oxide layer that protects the metal and actually self-heals when minor scratches occur, meaning your roof's integrity improves with age rather than degrades.

Interlock achieves UL 2218 Class 4 impact rating—the highest available—and the Guardian Warranty covers perforation from hailstones up to 1.5 inches. Many insurers recognize this durability and offer premium discounts for Class 4 metal roofs because you're statistically less likely to file a claim. Even though severe hail is uncommon in Cashmere's climate (typical wind gusts run about 83 km/h, rarely catastrophic), that Class 4 rating and warranty peace of mind can translate to real savings on your homeowners policy over the roof's lifetime.

energy-efficient Interlock colors reflect rather than absorb solar heat, with thermal emissivity up to 0.84 and initial solar reflectance as high as 0.55 (in Aged Copper Penny). Cashmere enjoys about 3,475 sunshine hours per year—plenty of opportunity for reflective coatings to earn their keep. In summer, while your neighbors' asphalt roofs absorb heat and drive up cooling costs, your metal roof bounces that energy back, keeping your attic cooler and reducing the strain on air conditioning. Cool Roof Rating Council certification confirms the performance, so you're buying documented energy savings, not marketing claims.

Almost certainly yes. The Mediterranean Tile profile, which replicates the look of heavy concrete or clay tile, weighs only about 0.59 lb/sq ft—roughly 96% lighter than the real thing. Even the heavier profiles (Shake at 0.58 lb/sq ft) are so light that most homes can install Interlock directly over an existing asphalt roof without reinforcing beams, adding support posts, or any structural modifications. The ICC-ES evaluation report ESR-1790 confirms code compliance across standard residential framing, so you avoid the $5,000–$15,000+ bills that slate or tile installations often require.

The Guardian Warranty is a lifetime limited, non-prorated material warranty for you as the original owner—it covers rusting, rotting, splitting, cracking, curling, and loss of impact resistance with no deductible and no time limit. It's also one-time transferable: the next owner gets a full 50-year coverage from the date of installation, a huge advantage if you ever sell. That's not a 30-year promise and then you're on your own; it's a financial guarantee that your roof won't fail due to material defects, backed by a company manufacturing in Delta, BC since 1998.

Yes, over the roof's life. Asphalt typically costs less to install but needs replacing every 15–25 years, creating tear-off and landfill waste each cycle. Interlock, installed correctly, lasts 50+ years with the original owner and another 50 for the next—that's one purchase, one installation, one warranty. Factor in zero maintenance (no cleaning, no repairs, no algae or moss treatments), potential insurance savings from the Class 4 hail rating, energy savings from energy-efficiency reflectance, and resale appeal, and the total cost of ownership favors metal significantly. Today's financing option—no payments and no interest until Spring 2027—removes the upfront barrier entirely.

Almost none. Unlike asphalt (which hardens, cracks, and sheds granules), wood shakes (which split and rot), or tile (which needs regrouting), Interlock's interlocking aluminum panels require no sealing, no cleaning, no repairs, and no seasonal maintenance. Rain naturally clears debris; the Alunar 70% PVDF coating resists algae and moss growth. Cashmere's 360 mm of annual rain and 150 cm of snow work for you, not against you—they keep the roof clean. The CALGreen verification confirms reduced maintenance obligations, so you're free to enjoy your home instead of climbing ladders with a pressure washer every spring.

Yes, it installs over your existing roof in most cases because the aluminum is so lightweight (Slate at 0.41 lb/sq ft) that no structural reinforcement is needed. A qualified installer like Interlock Metal Roofing (PNW) Inc., serving this region since 1997, removes only damaged or rotted decking, adds an underlayment and solid strapping if needed, and interlocks the four-way aluminum panels—a fast, clean process that typically takes a few days to a week depending on roof size and complexity. There's no massive tear-off, no dumpster, no weeks of disruption. Your home stays dry throughout, and the installation complies with ICC-ES ESR-1790 (reissued 2025) and local building code.

Yes. Cashmere averages about 150 cm of snow, 359 mm of rain, roughly 88 freeze–thaw days a year, with peak wind gusts near 83 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.