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

Interlock panels shed snow effectively because aluminum conducts heat away from the roof surface, reducing ice dam formation compared to asphalt, which traps heat unevenly. With about 88 cm of snow annually and roughly 79 freeze-thaw days per year in Waukesha County, this matters: snow slides off the smooth interlocking profiles rather than sitting and refreezing. The four-way interlocking panels lock together so tightly that wind gusts up to 96 km/h won't lift edges to trap snow underneath. Add optional snow guards if you want controlled runoff near walkways.

No. Aluminum expands and contracts naturally without cracking because it has no grain structure like wood or brittleness like ceramic tile. With about 79 freeze-thaw days per year here and roughly 822 mm of annual rainfall, your roof endures repeated wet-freeze-thaw stress — but aluminum's oxide layer remains intact through every cycle. Unlike asphalt, which hardens and becomes brittle in cold, aluminum stays flexible. The Alunar 70% PVDF coating (warranted 30 years against chalking and fading per ASTM D4214) protects against salt-laden winter air, and because aluminum contains no iron, it simply cannot rust, even as moisture and temperature swing.

Aluminum cannot rust because it contains no iron — rust is iron oxide, and aluminum is iron-free. Instead, aluminum naturally forms a thin, transparent oxide layer that actually protects the metal underneath. If the coating scratches, this oxide layer self-heals. With about 822 mm of rain annually and frequent freeze-thaw exposure across Waukesha County, corrosion resistance is critical; steel roofs require constant vigilance against rust staining and structural failure. Interlock uses roofing-grade 3105-H24 and 3003-H24 aluminum alloy (ASTM B209) with Alunar 70% PVDF fluorocarbon on both sides, creating a two-layer barrier against moisture. You'll never worry about rust eating through your roof.

Interlock's four-way interlocking panels are warranted to resist wind speeds up to 120 mph (193 km/h), well above the gusts Lisbon typically experiences — about 96 km/h on average. The panels lock on all four edges, preventing uplift or edge flutter even in violent storms. Each profile (Slate, Cedar Shingle, Shake, Standing Seam, Mediterranean Tile) maintains the same structural integrity because the interlocking geometry distributes wind load across the entire roof assembly rather than relying on fasteners alone. In Waukesha County's variable spring and fall weather, this engineered rigidity means peace of mind during severe weather watches.

Interlock panels carry a UL 2218 Class 4 impact rating — the highest available — and the Guardian Warranty even covers perforation from hailstones up to 1.5 inches. Class 4 means the roof withstands repeated impacts from steel balls dropped from 20 feet without cracking or denting. Many insurance companies recognize this rating and offer premium discounts; contact your agent with the ICC-ES evaluation report ESR-1790 for specifics. Given Wisconsin's spring and summer severe-weather potential, a roof that won't dent or crack under hail is a selling point both for your peace of mind and your homeowner's insurance rates.

No. Interlock panels are extraordinarily light — the Mediterranean Tile profile, which replicates the look of heavy concrete or clay tile, installs at about 0.59 lb/sq ft and is roughly 96% lighter than traditional tile. This means you typically install over your existing asphalt roof without any structural reinforcement, saving thousands in engineering and framing upgrades. Even the Shake profile weighs just 0.58 lb/sq ft. Many homes in Waukesha County built 50+ years ago with standard trusses can safely support a metal roof upgrade that would be impossible with real slate or tile. Your existing roof structure can handle it; a local installer will confirm specifics during the site visit.

Metal requires far less maintenance than asphalt or traditional tile. Asphalt shingles need regular inspection for lifting, curling, and granule loss — especially harsh in Wisconsin's 79 annual freeze-thaw days — and typically last 15–20 years. Wood shakes split and rot. Concrete tile cracks. Interlock panels need only occasional cleaning (gutters stay clear, leaves brushed off) and inspection after severe weather. The Alunar 70% PVDF coating is CALGreen-verified for reduced maintenance requirements. With about 3,128 sunshine hours and 822 mm of rain annually, your roof self-cleans through natural weathering and doesn't degrade. The Guardian Warranty covers material defects for life — you're not replacing your roof in 20 years.

In Lisbon's climate with about 3,128 annual sunshine hours, reflective roofing actually saves energy year-round. Interlock's energy-efficient colors have thermal emissivity of 0.84 and solar reflectance up to 0.55, meaning they bounce heat away in summer and allow the home to cool passively. Unlike asphalt, which absorbs solar radiation and radiates it into your attic, aluminum reflects it back to the sky. The Cool Roof Rating Council rates Interlock profiles for measurable energy performance. In summer, this reduces air-conditioning load; in winter, the low-emissivity finish doesn't steal radiant heat from passive solar gain. Over a 50-year roof lifespan, energy savings compound — especially as utility costs rise.

Interlock's Guardian Warranty is a lifetime limited, non-prorated material warranty for the original owner — covering rusting, rotting, splitting, cracking, curling, and loss of impact resistance. It transfers once to the next owner for 50 years from completion, which adds significant resale value in Waukesha County's competitive market. The roof is manufactured to last 50+ years; many Interlock installations from 1998 onward (over 25 years old) are still performing flawlessly. The Alunar 70% PVDF coating is separately warranted 30 years against chalking and fading. Compare that to asphalt (15–20 years), and you're buying your last roof. One installation, no tear-off waste, no mid-life replacement.

Yes. Aluminum is approximately 95% recyclable; at end of life, your roof can be melted down and reused indefinitely. Asphalt shingles, by contrast, end up in landfills by the millions of tons annually — a tear-off typically produces 10+ tons of waste per home. Interlock's lightweight design (0.41–0.59 lb/sq ft depending on profile) also reduces manufacturing emissions compared to heavy slate or tile. Because you install once and never replace, you eliminate the landfill cycle entirely. Interlock has been manufactured in Delta, BC, since 1998 and installed everywhere from coastal homes to Antarctica, proving durability across extreme climates. One aluminum roof = no asphalt waste, no repeat demolition and reconstruction every 20 years.

Yes. Lisbon 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.