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

Metal roofing handles snow differently—and better in Greenfield's climate of about 88 cm annually. The smooth aluminum surface sheds snow faster than asphalt, reducing dangerous ice dam formation that occurs during freeze-thaw cycles. With roughly 79 freeze-thaw days per year here, the ability to let snow slide off (using optional snow guards to direct it safely) protects your gutters and fascia. Aluminum's light weight—the Shingle installs at just 0.41 lb/sq ft—means no structural strain from snow load, and it won't crack or curl like asphalt does through repeated freezing.

No—aluminum roofing thrives through freeze-thaw stress. Greenfield experiences about 79 freeze-thaw days yearly, a cycle that splits asphalt and curls wood shingles. Aluminum expands and contracts without cracking because it's a non-porous metal; its self-healing oxide layer seals itself when scratched, preventing corrosion from salt spray or moisture penetration. The Alunar® 70% PVDF fluorocarbon finish is applied to both sides of every panel and warranted 30 years against chalking and fading under these exact conditions. That's why Interlock panels have been installed from coastal salt-air homes to Antarctic research stations since 1998.

Aluminum cannot rust—it contains no iron, the element that oxidizes and rusts. Instead, aluminum forms a thin, transparent oxide layer that actually protects the metal beneath and self-heals when scratched. Greenfield's 822 mm of annual rainfall won't corrode it. Interlock uses roofing-grade 3105-H24 / 3003-H24 aluminum alloy (ASTM B209) with a two-sided Alunar® fluorocarbon finish, creating a barrier that has proven itself across 25+ years of real-world installation. Steel roofs require paint maintenance and rust repair; aluminum requires neither. For homeowners seeking a truly permanent roof, this distinction matters.

Greenfield's typical wind gusts reach 96 km/h, and Interlock's four-way interlocking aluminum panels are warranted to resist wind speeds up to 120 mph (193 km/h) when installed to specification. The interlocking design—where all four edges of each panel lock to adjacent panels—distributes wind force across the entire roof rather than loading individual fasteners. This is verified by ICC-ES evaluation report ESR-1790 (reissued 2025, covering IBC/IRC codes). Unlike asphalt shingles, which can peel or lift in strong gusts, metal panels stay secured. The UL 2218 Class 4 impact rating confirms the panels' structural integrity even under extreme weather stress.

Yes—Interlock metal roofing carries a UL 2218 Class 4 impact rating, the highest available, and the Guardian Warranty covers perforation from hailstones up to 1.5 inches. In Greenfield's climate of about 3128 sunshine hours and frequent weather variability, hail is a genuine concern. Class 4 rating often qualifies homeowners for insurance premium discounts because the roof is less likely to require costly claims. Aluminum's light weight and non-porous surface mean hail impact won't create hidden damage that leads to leaks years later, unlike asphalt or wood. Contact your insurer about discount eligibility—many carriers recognize the durability advantage.

energy-efficient Interlock colors reflect heat rather than absorb it, with thermal emissivity of 0.84 and initial solar reflectance up to 0.55 in Aged Copper Penny. Greenfield receives about 3128 sunshine hours annually; that reflective capacity reduces the heat load entering your attic on sunny days, lowering air conditioning demand. The Cool Roof Rating Council has verified these ratings. Asphalt shingles absorb solar energy; metal sheds it. Over a 50-year roof life, the energy savings compound—especially if you install energy-efficiency colors. The warranty covers these reflectance properties against fading for 30 years, so the benefit doesn't degrade.

No structural reinforcement is needed. Interlock's aluminum panels are extraordinarily light—the Slate and Shingle profiles install at roughly 0.41 lb/sq ft, while the Mediterranean Tile (which replicates heavy clay or concrete tile) weighs only about 0.59 lb/sq ft, making it 96% lighter than real tile. Most homes support traditional tile without reinforcement; Interlock tile is a fraction of that weight. This matters in Greenfield, where about 88 cm of snow per year adds load. The lighter roof reduces cumulative winter stress on your structure. Interlock installs directly over most existing roofs, saving the cost and landfill impact of a tear-off. Your contractor will confirm deck condition during the site survey.

Metal roofing is the last roof you install. Asphalt lasts 15–20 years and requires costly tear-offs; Interlock carries a lifetime limited, non-prorated material warranty for the original owner and a one-time transferable 50-year term for the next owner. Over 50 years, one asphalt replacement saves you money on labor and disposal alone. Add energy savings from the energy-efficient reflective coating, zero maintenance (no algae treatment, no repairs from freeze-thaw cracking), and potential insurance discounts, and the math favors metal. The Guardian Warranty covers rusting, rotting, splitting, cracking, curling, and impact resistance—problems that drain asphalt owners' wallets repeatedly.

Virtually none—aluminum requires no painting, sealing, or algae treatment. Greenfield's 822 mm annual rainfall washes away debris; the smooth, non-porous surface won't trap moisture or develop the rot, splits, and curling that plague asphalt and wood. Asphalt roofs need algae cleaning, shingle replacement, and flashing repair every few years. Interlock panels are verified CALGreen-compliant for reduced maintenance. The Alunar® finish applied to both sides is warranted 30 years against chalking and fading, so you won't see color loss from Greenfield's 79 annual freeze-thaw cycles. Occasional leaf removal and gutter cleaning—which any roof needs—is all you'll do.

Interlock Metal Roofing, the manufacturer's authorized local installer, has served the Milwaukee County region since 2001. They understand Greenfield's climate—822 mm rain, 88 cm snow, and 96 km/h wind gusts—and know how to detail installations for these conditions. The crew will assess your existing roof, advise on which profile (Slate, Cedar Shingle, Shake, Standing Seam, or Mediterranean Tile) best suits your home, and confirm your structure can support the installation (typically without reinforcement). They'll handle permitting and schedule work to minimize disruption. Contact them for a no-obligation site survey and warranty registration, which activates your Guardian Warranty coverage immediately upon completion.

Yes. Greenfield averages about 88 cm of snow, 822 mm of rain, roughly 79 freeze–thaw days a year, with peak wind gusts near 96 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.