Metal Roofing in Afton, Minnesota — Lifetime Interlock® Aluminum Shingles Installed Locally

Aluminum expands and contracts minimally—far less than asphalt or wood—so the repeated freeze-thaw stress Afton experiences about 81 days per year won't crack, curl, or split it. The 3105-H24 aluminum alloy is engineered for thermal cycling; its oxide layer self-heals when scratched, so salt spray from winter roads and the freeze-thaw wear itself don't initiate corrosion. Steel roofs rust under these conditions. Aluminum simply doesn't.

Metal panels shed snow faster than asphalt because the smooth, interlocked surface offers less friction; you can install snow guards if you prefer staged shedding. The four-way interlocking seams are engineered to resist water infiltration, so meltwater from ice dams won't leak through gaps—common failures in asphalt roofs. With about 94 cm of snow annually and typical gusts to 95 km/h, the interlocking design and 120 mph wind warranty mean your roof stays sealed and stable through thaw cycles.

Yes. The four-way interlocking aluminum panels are warranted to resist wind speeds up to 120 mph when installed to specification—more than enough for Washington County's typical gusts of 95 km/h. The mechanical interlocks prevent panels from lifting or separating; each panel is fastened to the substrate and held by its neighbors. Winter wind pushing moist air against your roof won't peel back a metal panel the way it can with loose or deteriorating asphalt shingles.

Aluminum contains zero iron, the element that oxidizes into rust. Instead, aluminum forms a thin, invisible oxide layer that actually protects the metal underneath—and when scratched, it self-heals automatically. Steel roofs, even galvanized ones, eventually rust through in wet climates. Afton averages 843 mm of rain annually; an aluminum roof won't corrode under that exposure. The Alunar 70% PVDF fluorocarbon coating on both sides adds a 30-year fade and chalk warranty, so your color investment outlasts the base material's corrosion immunity.

No structural reinforcement needed. The Interlock Slate installs at 0.41 lb per square foot, and even the heaviest profile—Mediterranean Tile at 0.59 lb per square foot—is roughly 96% lighter than concrete or clay tile. Most homes' existing roof framing was built to handle asphalt shingles plus snow load; Afton's ~94 cm annual snow is well within code limits. The light weight also means Interlock installs directly over most existing roofs, avoiding tear-off costs and landfill waste.

Interlock Metal Roofing holds UL 2218 Class 4 impact rating—the highest available—and the warranty covers perforation from hailstones up to 1.5 inches. Some insurers offer premium reductions for Class 4 roofing; check with your agent. Afton's hail risk is lower than plains states, but when hail does strike, aluminum's non-combustibility and impact durability mean fewer claims. Compare that to asphalt: a single severe hail event can require full replacement. Over 30+ years, the Class 4 rating may offset a portion of your material investment through insurance recognition.

The upfront cost is higher than asphalt, but total cost of ownership favors metal. You'll buy asphalt three to four times in a 50-year period; Interlock comes with a lifetime limited, non-prorated material warranty for the original owner and transfers once (50 years from completion). No roof replacement means no tear-off labor, no landfill fees, no interior water damage during installation. Maintenance is minimal—occasional gutter cleaning. Over the life of your home, you avoid the cumulative labor, disposal, and disruption of multiple asphalt replacements.

The Guardian Warranty is lifetime limited and non-prorated for the original owner—meaning no dollar reduction over time—and covers rusting, rotting, splitting, cracking, curling, and loss of impact resistance. It transfers once to the next owner, who gets 50 years from completion. That's structural peace of mind: you're protected against the material failures that plague asphalt and wood. The coating itself is warranted 30 years against chalking and fading (ASTM D4214/D2244 measured). Most homes keep one roof for 20–30 years; this warranty extends your options without material risk.

energy-efficient colors reflect heat rather than absorbing it the way asphalt does. Interlock's Aged Copper Penny and other cool-roof colors achieve solar reflectance up to 0.55 and thermal emissivity of 0.84, rated by the Cool Roof Rating Council. Afton receives about 3110 sunshine hours annually; every reflective hour reduces air conditioning load. The effect compounds: asphalt heats to 170+ degrees, driving cooling costs; metal stays cooler. Darker profiles still reflect more than asphalt, and all profiles outperform traditional roofing on summer energy bills, especially in June–August when the sun angle is high.

Interlock Metal Roofing has served this region since 2001—over two decades of Minnesota winter installations, wind events, and seasonal extremes. They know Afton's freeze-thaw pattern (about 81 days per year), snow load (~94 cm annually), and local building codes. Local installation means faster scheduling, familiar suppliers, and a contractor who'll be here if you need warranty service. The parent company has manufactured these panels in Delta, BC since 1998 and installed them from coastal salt-air homes to an Antarctic research station—your roof is in the hands of people who've solved every climate problem Minnesota throws at it.