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

Yes. Granville averages about 88 centimeters of snow annually, and metal's smooth, hard surface sheds snow and ice far more effectively than asphalt's granular texture, which traps moisture and promotes ice dam formation. The four-way interlocking aluminum panels create a unified surface—no seams or valleys where ice can wedge and split shingles. With roughly 79 freeze-thaw cycles per year in your area, that repeated expansion and contraction that cracks asphalt simply doesn't affect aluminum. You'll stay ahead of winter without constant roof raking or ice removal.

Aluminum fundamentally cannot rust because it contains no iron—rust requires iron to form. Instead, aluminum develops a microscopic oxide layer that actually protects the underlying metal and heals itself when scratched. That's why Interlock's roofing-grade 3105-H24 and 3003-H24 aluminum alloy (ASTM B209 certified) is topped with Alunar 70% PVDF fluorocarbon coating on both sides. In Granville, where you see about 822 millimeters of rain yearly, that double-sided protection becomes a genuine asset; steel would require constant maintenance. The Guardian Warranty explicitly covers rust—because it will not occur.

No. Aluminum's atomic structure doesn't absorb and release water the way asphalt and wood do, so freeze-thaw cycling—Granville experiences roughly 79 cycles annually—causes no cracking, curling, or splitting. Asphalt shingles absorb moisture between freeze and thaw, expand unevenly, and fail. Aluminum expands minimally and uniformly. Because the four-way interlocking panels move slightly as one unit with temperature swings and the Alunar coating (warranted 30 years against chalking and fading) doesn't degrade in those cycles, your roof remains structurally intact through decades of winters. The Guardian Warranty covers cracking and curling—materials that simply won't fail this way.

Absolutely. Milwaukee County sees typical gusts around 96 kilometers per hour, and Interlock's four-way interlocking aluminum panels are warranted to resist wind speeds up to 120 miles per hour (193 km/h) when installed to specification. The interlocking design means each panel is mechanically locked to its neighbors on all four sides—wind tries to lift the panel, but the neighboring panels hold it down. You're not relying on fasteners alone; the panels brace each other. The ICC-ES ESR-1790 evaluation (reissued 2025, covering IBC and IRC codes) certifies this performance. Your roof won't lift, flutter, or fail in the gusts this region regularly produces.

Yes on both counts. Interlock aluminum roofing carries UL 2218 Class 4—the highest impact rating available—and the warranty even covers perforation from hailstones up to 1.5 inches. Class 4 means the roof has been impact-tested to withstand severe hail and retain its structural integrity and water-shedding ability. Some insurers recognize this durability and offer discounts; you'll want to check with your carrier about premium reductions for non-combustible, Class 4-rated roofing. In Wisconsin's spring and summer storm season, that rating is concrete protection. Unlike asphalt shingles, which dent easily and develop punctures that seed leaks years later, aluminum's hardness and the warranty's explicit hail coverage give you genuine peace of mind.

No. Interlock's aluminum is extraordinarily light—the Mediterranean Tile profile, for example, installs at only about 0.59 pounds per square foot, making it roughly 96 percent lighter than concrete or clay tile. Your existing roof structure—whether wood trusses or rafters rated for asphalt shingles—handles metal roofing without reinforcement. This also means Interlock can install directly over most existing roofs, eliminating the cost and landfill impact of tearing off old material. Granville's building officials and ICC-ES ESR-1790 evaluation confirm the installation is code-compliant. You save on structure upgrades, labor, and disposal fees compared to heavyweight tile or slate alternatives.

The Guardian Warranty is a non-prorated lifetime limited material warranty for you as the original owner—meaning if a panel fails from rust, rot, splitting, cracking, curling, or loss of impact resistance, Interlock replaces it at no cost, year one through year thirty and beyond. It's transferable once to the next owner, who receives 50 years of coverage from completion. That's genuine security: your roof won't cost you surprise replacement dollars. The Alunar coating carries a separate 30-year warranty against chalking and fading (ASTM D4214 and D2244 measured). Combined with aluminum's inherent inability to rust or rot—properties verified by material science, not marketing—you're buying the last roof you'll install.

Aluminum metal roofing requires virtually none. Unlike asphalt shingles, which shed granules, curl in heat, and degrade under UV exposure, or cedar shakes, which split, warp, and need regular treatment to resist rot and insects, Interlock's aluminum panels are inert. They don't absorb moisture (so no rot or fungal growth across Granville's 822 millimeters of annual rainfall), don't expand and contract unpredictably in the 79 yearly freeze-thaw cycles, and shed debris naturally in rain. CALGreen-verified, the roofing qualifies specifically for reduced maintenance claims. You'll wash it occasionally for aesthetics, but that's it. Over a 50-year roof life, that's zero structural maintenance—no repairs, no sealant reapplication, no moss treatment.

Yes, measurably. Interlock aluminum roofing is approximately 95 percent recyclable at end of life, and aluminum recycling uses only five percent of the energy required to produce virgin aluminum. Compare that to conventional asphalt shingle removal: every 20 to 25 years, you tear off 100+ pounds of asphalt and fiberglass per 100 square feet and send it to landfill—it doesn't biodegrade. Over Granville's typical roof lifespan, that's two or three full tear-off cycles per home. Aluminum's longevity (lifetime warranty, 50-year transfer term) means you install once. The Alunar coating (warranted 30 years) and the material's durability eliminate the asphalt replacement-and-waste cycle entirely. Your roof becomes a one-time investment, not a recurring environmental cost.

Yes. Interlock Metal Roofing has served this region since 2001 and operates directly in Granville and Milwaukee County. That tenure matters: local installers understand Wisconsin's freeze-thaw cycles, snow loads, and typical wind gusts around 96 kilometers per hour. They know the permit process, local inspectors, and how to install correctly over existing roofs in cold climates. Interlock manufactures in Delta, BC, and has installed everywhere from coastal salt-air homes to an Antarctic research station—so regional expertise is backed by proven global experience. When you call, you're reaching installers who've done hundreds of roofs in your neighborhood and can speak directly to how Interlock performs through Granville winters and summer storms.

Yes. Granville 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.