Metal Roofing in Dunn, Wisconsin — Lifetime Interlock® Aluminum Shingles Installed Locally

Interlock's four-way interlocking aluminum panels shed snow and ice naturally without pooling water underneath, which prevents ice dams common on asphalt roofs in Dunn's climate of about 89 cm annual snow and 84 freeze-thaw cycles per year. The lightweight design—about 0.41 lb/sq ft for the Shingle profile—means no structural strain even under heavy snow load, and you can add snow guards if desired. Aluminum's smooth surface and superior drainage work together to manage the wet-freeze cycles your area experiences.

No—freeze-thaw is precisely why aluminum excels in Dunn. With about 84 freeze-thaw days yearly and nearly 781 mm of rain, your roof faces constant expansion and contraction, but roofing-grade 3105-H24 aluminum alloy (ASTM B209) is engineered to flex safely through those cycles without cracking or splitting. The Alunar 70% PVDF fluorocarbon coating, warranted for 30 years against chalking and fading, maintains its integrity through temperature swings. Traditional asphalt shingles become brittle in freeze-thaw zones; aluminum remains resilient.

Aluminum cannot rust because it contains no iron—the element that rusts. Instead, aluminum develops a microscopic oxide layer that actually self-heals when scratched, a natural protection that improves over time in wet climates like Dunn's 781 mm annual rainfall. Steel roofs, by contrast, require protective coatings because bare steel oxidizes and weakens. Your Interlock roof is coated on both sides with Alunar 70% PVDF fluorocarbon finish for extra protection, but the material itself is inherently corrosion-resistant, not dependent on coatings to survive.

Absolutely—Interlock's four-way interlocking panels are warranted to resist wind speeds up to 120 mph, well above Dunn's typical gusts of about 104 km/h. The mechanical interlock system means panels grip each other, preventing uplift or separation during storms. Dunn averages daily-max winds around 20 km/h, but spring and autumn can deliver stronger gusts; the interlocking design and fastening-to-spec installation ensure your roof stays secure. This engineering is certified under ICC-ES ESR-1790 and exceeds Wisconsin's building code requirements.

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. This durability may qualify you for insurance discounts; contact your agent with the product specs. While Dunn's hail risk is moderate compared to the Great Plains, severe spring storms do occur. The non-combustible aluminum also earns you a Class A fire classification, another factor some insurers reward. Request a quote from your provider mentioning the UL 2218 Class 4 rating and ESR-1790 code compliance.

Your home almost certainly needs no structural reinforcement. The Interlock Shake profile weighs about 0.58 lb/sq ft and the Tile profile about 0.59 lb/sq ft—approximately 96% lighter than real concrete or clay tile. Most homes can be retrofitted without any structural upgrades because metal roofing is lighter than the original asphalt it replaces. The Slate profile installs at just 0.41 lb/sq ft. Even existing roof decks that would struggle under slate or tile support Interlock panels easily, making retrofits straightforward and cost-effective for Dunn homeowners.

The Guardian Warranty is a lifetime limited, non-prorated material warranty for you as the original owner—covering rusting, rotting, splitting, cracking, curling, and loss of impact resistance with no time limits. It's transferable once to the next owner for 50 years from completion, which strengthens your home's resale value. Combined with the 30-year coating warranty on the Alunar finish, you're protected through decades of Dunn's 84 annual freeze-thaw cycles and 3,089 sunshine hours. This is the only roof you'll likely need to buy.

energy-efficient Interlock colors reflect heat rather than absorb it, with thermal emissivity rated at 0.84 and initial solar reflectance up to 0.55 for colors like Aged Copper Penny. Unlike dark asphalt that absorbs solar energy, reflective metal roofing stays cooler and reduces cooling load on hot days. Dunn enjoys about 3,089 annual sunshine hours, so this reflectance matters across the year. The Cool Roof Rating Council rating confirms the energy benefit. Summer cooling costs depend on your air-conditioning use, but lighter-colored metal roofs demonstrably outperform dark asphalt in heat management.

Interlock Metal Roofing has served the Dunn and Dane County region since 2001—over two decades of local installation expertise. The company manufactures panels at its Delta, BC facility and maintains strict installer certification, ensuring your roof meets ICC-ES ESR-1790 code compliance and warranty terms. Local service means faster scheduling, easier communication, and an installer who understands Wisconsin weather patterns. When you need future service or have questions about your roof, you're working with a team familiar with your area's specific climate conditions, including the 89 cm annual snow and 104 km/h wind gusts.

Yes—approximately 95% of Interlock's aluminum is recyclable at end of life, versus asphalt shingles that end up in landfills for decades. Dunn generates significant roofing waste during replacement cycles; choosing metal breaks that cycle. Aluminum is infinitely recyclable without degradation, making it a circular material. The manufacturing process is energy-efficient, and the long lifespan—lasting generations rather than 15-20 years—means fewer tear-offs and replacements over your home's lifetime. CALGreen verification confirms Interlock's reduced environmental burden. When you eventually recycle the roof, it becomes new products rather than permanent waste.

Yes. Dunn averages about 89 cm of snow, 781 mm of rain, roughly 84 freeze–thaw days a year, with peak wind gusts near 104 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.