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

Metal roofs shed snow and ice far better than asphalt because the smooth, hard surface won't hold moisture or allow ice dams to form like granular shingles do. Fontana averages about 84 cm of snow yearly with roughly 83 freeze-thaw cycles per year—exactly the conditions that crack and curl asphalt over time. Interlock's four-way interlocking aluminum panels stay rigid through those repeated freeze-thaw swings, and the lightweight design (Cedar Shingle at 0.41 lb/sq ft) means you're not straining your structure under snow load. Optional snow guards keep large sloughs from damaging landscaping or gutters.

Aluminum cannot rust because it contains no iron—rust requires iron to form. Instead, aluminum develops a thin oxide layer that actually protects it and self-heals when scratched. Fontana receives about 838 mm of rain yearly plus regular moisture from snow melt, which would devastate a steel roof over time. Interlock uses 3105-H24 and 3003-H24 roofing-grade aluminum alloy (ASTM B209) and applies Alunar 70% PVDF fluorocarbon coating to both sides of every panel, adding an extra 30-year warranty against chalking and fading. That dual-coat approach is why Interlock panels last from coastal salt-air homes to Antarctic research stations.

Yes—freeze-thaw cycling actually favors metal over asphalt. Fontana experiences about 83 freeze-thaw days per year, which causes asphalt shingles to curl, crack, and lose granules as water seeps into the material, freezes, expands, and thaws. Aluminum is not porous and doesn't absorb water, so it simply contracts and expands without damage. The four-way interlocking design allows each panel to move independently without stressing seams or fasteners. With annual rainfall around 838 mm and winter temperatures dipping well below freezing, a material that doesn't absorb moisture and can move freely is exactly what your roof needs.

Almost certainly yes, without reinforcement. Interlock's Mediterranean Tile profile—which visually replicates heavy clay or concrete tile—weighs only about 0.59 lb/sq ft, making it roughly 96% lighter than the genuine tile it resembles. This weight advantage means you install the Tile profile over most existing asphalt roofs without structural upgrades. Compare that to traditional clay tile at 15+ lb/sq ft or slate at 7–10 lb/sq ft, and you realize why lightweight aluminum eliminates the costly reinforcement that other premium roofs demand. Fontana's typical wind gusts reach 100 km/h with sustained winds around 19 km/h, so the structural simplicity doesn't compromise wind resistance—the four-way interlocking panels handle all that movement.

Yes. Interlock panels are warranted to resist wind speeds up to 120 mph (193 km/h) when installed to specification, and Fontana's typical wind gusts around 100 km/h sit well within that envelope. The four-way interlocking design means each panel locks to its neighbors, distributing wind load across the entire roof rather than relying on fasteners alone. The panels also interlock in the vertical dimension, so wind can't slip underneath and lift them. That engineering is verified under ICC-ES evaluation ESR-1790 (IBC/IRC, reissued 2025), the same building code that covers your roof in Walworth County. No special bracing or reinforcement needed.

Metal roofing can absolutely survive hail better than asphalt. Interlock aluminum achieves UL 2218 Class 4 impact rating—the highest available—and the warranty even covers perforation from hailstones up to 1.5 inches. Class 4 means the roof withstands impacts that would dent or puncture asphalt, wood, or tile. Some insurance companies recognize this durability and offer premium discounts on metal roofs with high impact ratings, though you'll want to confirm with your own carrier. Fontana's climate brings about 3084 hours of sunshine per year, so you're not in the high-hail corridor, but the Class 4 rating gives you genuine protection and peace of mind year-round.

Interlock metal roofs are backed by The Guardian—a lifetime limited, non-prorated material warranty for the original owner, covering rusting, rotting, splitting, cracking, curling, and loss of impact resistance. Because aluminum cannot rust and the roof doesn't rot or curl, you're essentially protected for the life you'll own the house. The Alunar coating carries a separate 30-year warranty against chalking and fading. If you sell, the warranty transfers once to the next owner for 50 years from completion date, adding real value at closing. That combination—lifetime coverage for you, 50-year coverage for the buyer—reflects the material science: aluminum alloy and fluorocarbon coating simply don't degrade like asphalt.

Almost none compared to asphalt, wood, or tile. Asphalt roofs require regular granule checks, moss treatment, and gutter cleaning as shingles shed; wood shakes need annual inspection and periodic replacement of split or rotting pieces; slate and tile require repointing and individual piece replacement. Interlock metal roofs have no granules to shed, no wood to rot, and no individual pieces to crack—you rinse debris off during normal rain or the rare gutter cleaning, and that's it. Fontana's approximately 838 mm annual rainfall does that work naturally. The aluminum won't rust, the Alunar coating is warrantied 30 years against fading, and the interlocking design prevents water penetration. You'll inspect gutters and valleys annually, but the roof itself demands virtually no upkeep.

Yes, in most cases. Because Interlock panels weigh far less than traditional tile or slate—the Slate profile at roughly 0.41 lb/sq ft versus 10+ lb/sq ft for real slate—you can typically install them over an existing asphalt roof without structural reinforcement or removal. Your installer removes the old ridge cap, flashing, and gutters, lays a solid substrate or uses existing sheathing if sound, installs underlayment for additional weather protection and quiet performance, then fastens the interlocking panels per ICC-ES ESR-1790 specifications. Avoiding a full tear-off saves labor, debris disposal, and exposure time. Fontana's average of about 84 cm snow load won't overburden the existing structure with aluminum panels on top. The installation typically takes days, not weeks.

Substantially. Interlock aluminum is approximately 95% recyclable—when your roof eventually reaches end of life, the material returns to mills and becomes new product instead of landfill waste. Asphalt roofs, by contrast, generate millions of tons of tear-off debris annually that sit in landfills for decades. Over the roof's lifetime, you also eliminate the replacement cycle: asphalt lasts 15–25 years and requires tear-off, removal, and disposal; Interlock is warranted lifetime non-prorated for the original owner, stopping the demolition-and-waste loop entirely. Fontana's 3084 sunshine hours per year and regular rain mean your roof weathers normally, so you'll keep the same panels for life. That single installation, versus two or three asphalt replacements over 50 years, reduces your home's environmental footprint dramatically.

Yes. Fontana averages about 84 cm of snow, 838 mm of rain, roughly 83 freeze–thaw days a year, with peak wind gusts near 100 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.