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

Yes—aluminum's non-porous oxide layer won't absorb water, so it won't crack, curl, or degrade through freeze-thaw stress. Aztalan experiences roughly 87 freeze-thaw days per year, and asphalt absorbs moisture during the thaw phase, which then expands when refrozen. Interlock's 3105-H24 aluminum alloy, coated with Alunar 70% PVDF on both sides, is immune to that cycle. Your roof stays intact year after year without the seasonal damage asphalt develops in this climate.

Metal roofing handles Aztalan's average 86 cm of snow annually with zero structural strain. Interlock panels weigh as little as 0.41 lb/sq ft for the Shingle profile—about 96% lighter than slate or concrete tile—so the snow itself poses no risk to your framing. The smooth, hard surface sheds snow effectively, and ice tends to release rather than bond. If you want snow retention, optional snow guards can be installed. The real advantage: you avoid the structural reinforcement costs that heavy tile or slate would demand.

Aluminum cannot rust because it contains no iron. Unlike steel roofing, which relies on a paint coating to prevent rust (and fails when that coating chips), aluminum forms a self-healing oxide layer that protects it permanently. In Jefferson County's moisture-rich climate—about 788 mm of rain per year—this matters tremendously. Even if the Alunar finish is scratched, the aluminum oxide regenerates automatically. You're buying a roof that won't corrode, period, not one that needs ongoing coating maintenance to prevent it.

Over the roof's full lifespan, metal roofing becomes the cheaper choice. Asphalt fails in 15–25 years and then you pay again for removal and replacement—a costly cycle. Interlock comes with The Guardian warranty: lifetime limited for the original owner and a one-time transferable 50-year term for the next owner. That means one installation lasts decades longer than multiple asphalt replacements. When you factor in no tear-off waste, no UV maintenance, and zero rust or rot repairs in Aztalan's wet climate, the total cost of ownership heavily favors metal.

Yes—Interlock's energy-efficient colors reflect heat that asphalt absorbs, reducing cooling load when summer temperatures rise. The Aged Copper Penny profile achieves up to 0.55 initial solar reflectance and 0.84 thermal emissivity, rated by the Cool Roof Rating Council. On Aztalan's roughly 3,093 sunshine hours per year, that reflection compounds. You won't see dramatic savings in a cold climate, but every degree of attic cooling matters in peak season, and the reflectance is permanent—no degradation like asphalt's UV fade.

Yes. Interlock's four-way interlocking aluminum panels are warranted to resist wind speeds up to 120 mph—well beyond Aztalan's typical gust speeds (about 95 km/h or 59 mph). The interlocking design means no fastener pull-through and no panel separation. When ice and wind combine—common in Jefferson County winters—the rigid four-way lock keeps panels seated and sealed. The ICC-ES evaluation report ESR-1790 (2025) confirms compliance with IBC/IRC wind load requirements. You're getting engineered retention, not just fasteners hoping for the best.

Interlock earned UL 2218 Class 4, the highest impact rating available, and The Guardian warranty even covers perforation from hailstones up to 1.5 inches. Many insurers recognize this and offer discounts on roofs rated Class 3 or 4. Contact your agent with the UL 2218 Class 4 rating and ICC-ES ESR-1790 documentation to see your savings. In Wisconsin, hail isn't a daily threat, but when it hits, your roof's durability and insurance-grade rating translate into real money back.

Interlock installs quickly—typically 1–3 days depending on roof size and complexity. Because the panels weigh as little as 0.41 lb/sq ft for the Shingle profile, installation over an existing asphalt roof is usually possible without structural reinforcement, saving you tear-off costs and landfill waste. Your local Interlock installer, serving the region since 2001, will inspect your roof structure and existing fastening to confirm. Most residential projects go over existing roofs, keeping labor time and disruption to a minimum.

Aluminum is non-combustible, and Interlock offers Class A fire classification (the highest rating). This matters if your homeowner's insurance offers discounts for non-combustible roofing, or if local building codes in Jefferson County favor fire-rated materials. Class A protection means your roof won't ignite and won't spread flame, giving you and your family extra safety. The ICC-ES evaluation ESR-1790 confirms compliance, and the aluminum substrate is intrinsically fireproof—no coating degradation will change that over time.

Interlock requires virtually no maintenance. Asphalt needs annual inspections, granule replacement, and algae/moss treatment; wood shakes need sealing and rot inspection; clay tile requires cracked-piece replacement. Aluminum won't split, rot, curl, or support algae growth. Rainfall (about 788 mm per year in Aztalan) naturally cleans the surface. The Alunar 70% PVDF finish is warranted 30 years against chalking and fading, so discoloration won't force recoating. After installation, your roof works without you. That's CALGreen-verified, reduced-maintenance roofing.

Yes. Aztalan averages about 86 cm of snow, 788 mm of rain, roughly 87 freeze–thaw days a year, with peak wind gusts near 95 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.