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

Aluminum panels shed snow effectively because of their smooth, hard surface and four-way interlocking seams that prevent water infiltration. Millhome averages about 105 cm of snow annually with roughly 84 freeze-thaw cycles per year, which is exactly where metal roofing excels—the material won't split, crack, or absorb moisture the way asphalt deteriorates under repeated thawing. The panels weigh only 0.41 to 0.59 lb/sq ft depending on profile, so even a heavy wet snow load doesn't stress your structure, and snow guards can be added to manage runoff if desired. No structural reinforcement needed.

Aluminum contains no iron and cannot rust or rot, so repeated freezing and thawing—Millhome experiences about 84 freeze-thaw days per year—won't cause the material to degrade, crack, or absorb water like asphalt, wood, or concrete tile. The Alunar 70% PVDF coating is applied to both sides of each panel and is warranted for 30 years against fading and chalk, protecting the underlying metal from oxidation stress. Over 27 years of operation, the self-healing oxide layer on the aluminum surface actively resists corrosion, so your roof performs identically in year 20 as it did in year one.

Yes. Interlock's four-way interlocking aluminum panels are warranted to resist winds up to 120 mph when installed to specification, and Millhome's typical gusts average about 99 km/h (roughly 62 mph) with a 10-year mean wind speed near 20 km/h. The four-way lock means each panel overlaps its neighbors on all sides, so wind pressure can't find an edge to lift. The ICC-ES ESR-1790 evaluation (reissued 2025) confirms the system meets International Building Code wind-load requirements for this region, and the Guardian warranty covers wind damage so long as installation follows our standard protocol.

No. Aluminum contains no iron, so it cannot rust—that's a fundamental property of the material, not a coating claim. Interlock uses roofing-grade 3105-H24 and 3003-H24 aluminum alloy (ASTM B209 certified), and when the aluminum's natural oxide layer is scratched, it self-heals in the presence of oxygen, continuously renewing protection. The Alunar 70% PVDF fluorocarbon finish is applied to both sides for extra durability in corrosive environments, but even if the coating wears, the aluminum underneath cannot corrode the way steel does. The Guardian lifetime limited warranty covers rusting for the original owner and 50 years for the next, reflecting the material's inherent resistance to corrosion.

No. Interlock's aluminum panels are extraordinarily light—the Slate profile installs at 0.41 lb/sq ft, Cedar Shingle at roughly the same, Shake at 0.58, and Mediterranean Tile at 0.59 lb/sq ft. That Tile profile is about 96% lighter than concrete or clay tile, so your existing roof frame doesn't need bracing or reinforcement. Most roofs can accept the new metal panels over an existing asphalt layer, which actually provides additional sound dampening and insulation. This lightweight design is especially practical in Wisconsin's snowy climate because even 105 cm of winter snow poses no structural risk, and your home's load-bearing capacity isn't strained.

Interlock aluminum roofing requires far less maintenance than asphalt, wood, or traditional tile. No annual inspections for deterioration, no shingle curling or splitting from freeze-thaw cycles (Millhome averages 84 per year), no moss or algae growth on the smooth aluminum surface. The Alunar 70% PVDF coating is CALGreen-verified for reduced maintenance and warranted for 30 years against chalking and fading. Occasional gentle rinsing to remove dust or debris is all that's needed—compare that to asphalt shingles, which degrade visibly every few years and require partial replacement, or wood shakes that demand regular treatment. Your maintenance costs approach zero over the roof's life.

The Guardian is a lifetime limited, non-prorated material warranty for the original owner—no degradation of coverage over time. It covers rusting, rotting, splitting, cracking, curling, and loss of impact resistance from manufacturing defect. For the next owner, the warranty transfers once and provides 50 years from completion, so a home sold with Interlock on the roof gains a significant asset. The Alunar coating itself is separately warranted for 30 years against fading and chalking per ASTM D4214 and D2244 standards. This structure reflects the aluminum material's true lifespan; the roof is engineered to outlast the house, not fail on a predictable schedule.

Yes. Interlock offers energy-efficient colors with thermal emissivity of 0.84 and initial solar reflectance up to 0.55 (Aged Copper Penny and other light finishes), which means the metal reflects heat rather than absorbing it the way dark asphalt does. While Millhome's climate emphasizes winter (about 105 cm snow, 84 freeze-thaw days), the region still receives roughly 3,127 hours of sunshine annually, and a reflective metal roof measurably reduces the temperature gain inside your attic during those sunny days. The Cool Roof Rating Council rating confirms the performance in independent testing. Over 20+ years, the cumulative energy savings compound, and the reflectivity doesn't degrade because it's inherent to the aluminum and coating, not a surface treatment that wears away.

Yes. Aluminum roofing is approximately 95% recyclable at end of life, and recycled aluminum requires only 5% of the energy needed to refine virgin ore, so it can cycle through the economy indefinitely without degradation. Interlock's panels, manufactured since 1998 in Delta, BC, end the asphalt tear-off-to-landfill cycle—traditional shingles typically last 15-25 years, then millions of tons go to landfill annually because they cannot be recycled. A metal roof lasts 50-plus years and can be installed over existing asphalt, avoiding demolition waste. Millhome homeowners who choose Interlock make a tangible environmental choice: one lasting installation instead of multiple disposable ones, plus the material's full lifecycle recyclability.

Interlock Metal Roofing has served the Sheboygan County region since 2001, so any installation in Millhome comes with 24 years of local experience and accountability. The company manufactures in Delta, BC, and has deployed panels from coastal salt-air homes to an Antarctic research station, so they understand how the material performs in harsh conditions—and Wisconsin's snow, wind (gusts near 99 km/h), and freeze-thaw cycling is well within the scope of proven installations. A local installer means warranty support is immediate, any service questions go to people who know your roof's specific conditions, and referrals come from homeowners in your neighborhood who've already seen the long-term results. That continuity matters.