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

Aluminum's smooth, hard surface sheds snow and ice far better than asphalt, which traps moisture and accelerates deterioration in freeze-thaw conditions. Greystone experiences about 120 cm of snow annually and roughly 81 freeze-thaw days per year—the exact conditions that cause asphalt to crack, curl, and fail. Interlock's four-way interlocking panels remain dimensionally stable through these cycles; the non-porous aluminum won't absorb the water that expands when frozen. Optional snow guards are available to control runoff. The Guardian warranty explicitly covers cracking and curling, which don't occur with this material.

Aluminum contains no iron, so rust is chemically impossible. Steel roofs develop iron oxide (rust) when moisture reaches bare metal; aluminum forms a thin oxide layer that actually protects the underlying material and self-heals when scratched. Interlock uses roofing-grade 3105-H24 and 3003-H24 aluminum alloy per ASTM B209, coated on both sides with Alunar 70% PVDF fluorocarbon finish. This dual-side protection is critical in climates like Greystone with 760 mm annual rainfall. The Guardian warranty covers rusting—a promise that makes sense only because it cannot happen. Steel roofs require constant vigilance; aluminum eliminates that entire failure mode.

No reinforcement needed. Interlock Slate installs at just 0.41 lb/sq ft, and Mediterranean Tile—which replicates heavy clay or concrete tile—weighs only about 0.59 lb/sq ft, roughly 96% lighter than the real material. Most homes can support this load on existing framing. Interlock installs directly over your current roof in many cases, eliminating costly tear-off and structural work. The four-way interlocking panels distribute weight evenly across rafters. An ICC-ES evaluation report (ESR-1790, reissued 2025) confirms code compliance under IBC/IRC standards. This weight advantage saves thousands in foundation and framing costs compared to slate or tile alternatives.

No. Interlock's four-way interlocking panels are warranted to resist wind speeds up to 120 mph when installed to specification. Greystone's typical wind gusts reach about 97 km/h (60 mph), well below that threshold. The panels lock together mechanially—each sheet grips its neighbors on all four edges—so they function as a unified system rather than individual shingles. UL testing validates this performance under extreme conditions. The warranty explicitly covers wind resistance, and the Guardian coverage includes loss of impact resistance from weather events. This integrated locking system is engineered for regions with regular gust exposure like yours.

Interlock carries a UL 2218 Class 4 impact rating—the highest available—and the warranty covers perforation from hailstones up to 1.5 inches. This superior hail resistance may qualify you for insurance discounts that offset material cost. Aluminum's hardness resists denting far better than asphalt or wood, and any surface marks don't compromise the roof's integrity. Because hail damage claims are rare with Class 4 rated roofs, insurers often reduce premiums significantly. Speak with your agent about these potential savings before installation. The combination of proven impact performance and warranty coverage makes metal roofing a low-risk choice in hail-prone regions.

Virtually none compared to asphalt or wood. Aluminum doesn't rot, split, curl, or crack—it has no granules to shed, no tar to break down, and no wood fibers to degrade. Greystone's 3,073 annual sunshine hours and 81 freeze-thaw days cause asphalt to fail; aluminum remains inert through these cycles. The Alunar 70% PVDF coating is warranted 30 years against chalking and fading, so color stays true far longer than asphalt. Occasional leaf removal and gutter cleaning suffice. The Guardian warranty covers the material itself, not maintenance tasks, because the material simply doesn't degrade the way traditional roofing does. Over a 50-year lifespan, maintenance costs approach zero.

Installation timelines depend on roof size and existing conditions, but Interlock's lightweight design (0.41–0.59 lb/sq ft) allows direct installation over most current asphalt roofs without tear-off. Removing old roofing is expensive and creates landfill waste; applying new metal directly saves time and cost. Our local team, serving Greystone since 2001, assesses each home and determines the best approach. The four-way interlocking system installs efficiently—panels lock together on-site with no fasteners visible. Pitch, roof geometry, and existing condition affect timeline. Contact our local installer for a site evaluation and specific timeline estimate. Many homes complete installation within days rather than weeks.

Yes, if you choose energy-efficient colors. Interlock's reflective finishes achieve thermal emissivity up to 0.84 and initial solar reflectance up to 0.55 (Aged Copper Penny). These surfaces bounce heat away rather than absorbing it, reducing cooling load in summer and lowering energy bills. Cool Roof Rating Council certification validates this performance. Greystone's 3,073 annual sunshine hours means significant summer solar gain; reflective roofing directly reduces air-conditioning demand. Dark asphalt absorbs heat and radiates it into the attic, heating your home even with ventilation. Metal roofing with high solar reflectance keeps attics cooler. The energy savings over decades often exceed the material cost difference, especially in combination with modern insulation.

Yes. Interlock aluminum is approximately 95% recyclable; at end of life, it has scrap value and returns to manufacturing loops indefinitely without degradation. Asphalt shingles, by contrast, are removed every 15–25 years and sent to landfills by the millions of tons annually. Over Greystone's 81 freeze-thaw days and 760 mm rainfall yearly, asphalt lifespans are short; you'll tear off and discard multiple layers in your home's lifetime. Metal roofing eliminates this waste cycle. One Interlock installation replaces multiple asphalt generations, consuming no new petroleum-based materials and producing no construction waste. The non-prorated Guardian lifetime warranty reinforces durability—this roof stays on your home for 50+ years, not in a dump after 20. Aluminum's recyclability and longevity make it the genuinely sustainable choice.

Yes. Interlock aluminum qualifies for Class A fire classification—non-combustible material that meets the highest fire-safety standards. Aluminum cannot ignite or contribute to flame spread, unlike wood shakes or asphalt. The ICC-ES evaluation (ESR-1790, reissued 2025) confirms compliance with IBC/IRC fire codes for residential construction. Wisconsin's building standards require fire-rated materials in high-risk areas; metal roofing satisfies these requirements without compromise. Homeowner insurance providers often recognize Class A ratings and may offer premium reductions. The material itself acts as a fire barrier—it won't burn, melt, or release flammable gases. If wildfire or neighborhood fire risk concerns you, metal roofing provides definitive protection and peace of mind that wood or asphalt cannot match.

Yes. Greystone averages about 98 cm of snow, 760 mm of rain, roughly 81 freeze–thaw days a year, with peak wind gusts near 97 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.