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

Interlock's four-way interlocking aluminum panels shed snow and ice far more reliably than asphalt, which traps moisture and accelerates ice-dam formation during Richfield's typical 81 freeze-thaw cycles per year. The smooth, hard surface of aluminum—especially the Slate and Shake profiles—naturally slides accumulated snow off before it bonds to the roof, reducing the weight load and the thermal bridges that cause ice dams. Snow guards are available if you want to control runoff. With about 88 cm of snow annually and frequent temperature swings, this self-shedding behavior protects your gutters, siding, and foundation far better than materials that absorb freeze-thaw cycling.

No. Aluminum's crystalline structure and non-porous oxide layer actually strengthen under freeze-thaw stress, while materials like asphalt and wood absorb moisture and degrade with each cycle. Interlock's roofing-grade 3105-H24 aluminum alloy is immune to the rot, splitting, and dimensional change that plague wood shakes and shingles across Richfield's 81 annual freeze-thaw days. The Guardian Warranty explicitly covers cracking and curling—conditions that don't occur in aluminum. Over 25+ years of exposure to roughly 775 mm of rain and extreme temperature swings, the material simply does not fail from thermal stress the way conventional roofing does.

Aluminum cannot rust because it contains no iron. Instead, it forms a microscopic oxide layer that actually self-heals when scratched—a process that accelerates in moist air. Richfield averages 775 mm of rain annually, yet Interlock panels have been installed from coastal salt-air homes to Antarctic research stations since 1998 without corrosion failure. The Alunar 70% PVDF fluorocarbon finish on both sides of every panel (warranted 30 years against chalking and fading) adds an extra barrier, particularly valuable in the humid freeze-thaw environment. Steel roofing, by contrast, rusts within years if the coating is compromised. The Guardian Warranty covers rusting—a promise aluminum manufacturers can afford to make because it does not happen.

Interlock metal roofing carries a UL 2218 Class 4 impact rating—the highest available—and The Guardian Warranty covers perforation from hailstones up to 1.5 inches. This durability, combined with the non-combustible aluminum material (Class A fire rating available), qualifies many homeowners in Wisconsin for insurance discounts on both wind and impact coverage. Discuss the UL 2218 Class 4 rating and ICC-ES ESR-1790 approval with your agent; some carriers recognize metal roofing as a risk reduction. Given Richfield's typical gusts reaching 100 km/h and severe weather patterns, the combination of impact resistance and wind warranty (120 mph) often translates to measurable premium savings over the 50-year roof life.

Yes. The four-way interlocking design of Interlock panels resists wind speeds up to 120 mph when installed to specification—well above the 100 km/h gusts typical in Richfield. This interlock system distributes lateral load across adjacent panels, preventing the panel-by-panel failure that affects single-fastened metal or asphalt shingles. Washington County's average daily winds of about 20 km/h with seasonal gusts near 100 km/h pose no structural risk to a properly installed Interlock roof. The design is validated under ICC-ES ESR-1790 (IBC/IRC, reissued 2025) and has performed through decades of North American storm seasons. Asphalt shingles, by contrast, often require replacement after major wind events.

No structural reinforcement is needed. The Mediterranean Tile profile, for example, installs at only 0.59 lb/sq ft—about 96% lighter than concrete or clay tile—while the Cedar Shingle weighs roughly 0.41 lb/sq ft. This featherweight construction means Interlock panels can install directly over most existing asphalt roofs without adding load that would require costly frame or truss upgrades. In Richfield, where many homes were built in earlier decades with standard framing, this advantage eliminates a major installation barrier and cost. You get the visual depth and texture of traditional heavy materials without the structural expense, and the lightweight panels are easier to handle in Wisconsin's variable weather during installation.

Virtually none beyond standard gutter cleaning. Aluminum does not rot, split, curl, or lose impact resistance like asphalt, wood, or concrete tile. There are no missing shingles to replace, no algae growth to treat, no sealant to reapply. Interlock's Alunar finish (warranted 30 years against fading and chalking) and non-porous aluminum surface mean you avoid the water damage, mold, and decay cycles that plague organic materials in Richfield's 775 mm annual rainfall and 88 cm of snow. The CALGreen-verified design explicitly reduces maintenance burden. You may rinse debris after storms if desired, but structural maintenance is essentially zero across the roof's 50+ year life. This stands in stark contrast to asphalt (seal coating every 3–5 years) or wood shake (annual cleaning and treatment).

energy-efficient colors in Interlock's lineup carry thermal emissivity up to 0.84 and solar reflectance up to 0.55 (Aged Copper Penny profile), meaning they reflect heat rather than absorb it like asphalt shingles. Richfield receives about 3074 annual sunshine hours, so this reflective property meaningfully lowers attic temperature and air-conditioning load during warm months. The Cool Roof Rating Council rating confirms measurable energy savings. The same reflective property helps in winter by radiating absorbed solar warmth into the home. Lighter-colored metal also warms more slowly in spring and fall, reducing thermal shock on fasteners and seams. Over a 50-year ownership, the incremental energy savings—particularly in a climate with strong seasonal swings and moderate humidity—add meaningful value beyond the initial investment.

The 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 is one-time transferable to the next owner for 50 years from completion—a 50-year guarantee to a second buyer is extremely rare in roofing. This structure reflects the material's genuine durability: aluminum simply does not experience the age-related failures that trigger warranty claims in other products. Many homeowners in Richfield install Interlock expecting it to be the last roof they ever buy, and the transferable term protects resale value if you sell within the 50-year window. The Alunar finish carries a separate 30-year coating warranty (ASTM D4214/D2244 measured), ensuring color and protection remain intact through decades of Wisconsin's UV exposure and freeze-thaw stress.

Yes. Because Interlock panels weigh so little—the heaviest profile (Mediterranean Tile) is only 0.59 lb/sq ft—they install directly over most existing asphalt roofs without removal or structural work. This overlap installation saves weeks of tear-off labor and avoids the landfill waste of dumping old shingles. Interlock has been installing this way since 2001 across the region; the local installer handles regional conditions and understands Washington County's building codes. The installation timeline is typically faster than traditional roofing because there is no waste removal and the four-way interlocking system locks panels together securely even in Richfield's windy conditions. You avoid the disruption and cost of a full tear-off, and the existing shingles provide additional underlayment protection in a climate with 775 mm annual rainfall.

Yes. Richfield averages about 88 cm of snow, 775 mm of rain, roughly 81 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.