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

Interlock's four-way interlocking panels shed snow reliably because the smooth aluminum surface and slope geometry don't trap moisture the way asphalt does. With about 96 cm of snow annually in Randolph and roughly 82 freeze-thaw days per year, ice dam formation is a real concern—but aluminum's non-absorbent surface and thermal properties prevent the saturation that causes ice backing up under shingles. The panels are engineered to manage snow load without ice buildup. Optional snow guards can be added to roof sections where you want to control slide-off. No rotting, no moisture migration into the deck.

No. Aluminum's oxide layer is chemically stable across the freeze-thaw range and doesn't expand or contract the way composite materials do, so it won't crack, curl, or split. With 82 freeze-thaw days annually in Randolph and winter lows well below freezing, this durability matters. The Alunar 70% PVDF coating is applied to both sides of every panel, creating a protective barrier that handles temperature swings without degradation. That coating carries a 30-year fade and chalk warranty, verified to ASTM D4214 and D2244 standards. Your roof won't weaken from the seasonal cycling that shortens asphalt life.

Aluminum cannot rust because it contains no iron—the element that oxidizes and creates rust. When aluminum is exposed to air, a microscopic oxide layer forms on the surface within minutes; this layer is self-healing, so even if scratched or damaged, it regenerates. For Randolph, which receives about 831 mm of rain annually, this matters tremendously. The Alunar fluorocarbon finish adds a second protective barrier rated for 30 years against fading and chalking. The roofing-grade 3105-H24 and 3003-H24 aluminum alloy (ASTM B209) ensures structural integrity indefinitely. You get a roof that won't deteriorate the way steel does.

Yes. Interlock panels are warranted to resist wind speeds up to 120 mph when installed to spec, and Randolph's typical gusts reach about 97 km/h (60 mph). The four-way interlocking system locks each panel to its neighbors horizontally and vertically, distributing wind load across the entire roof plane rather than stressing individual fasteners. The ICC-ES ESR-1790 evaluation (reissued 2025) confirms compliance with IBC and IRC wind-load requirements. Over 25 years of installations from coastal salt-air environments to Antarctic research stations proves the design works in extreme conditions. Your roof won't lift, flutter, or lose panels in spring or autumn storms.

The Guardian Warranty is a lifetime limited, non-prorated material warranty for the original owner—no step-down in coverage year one or year ten. It covers rusting, rotting, splitting, cracking, curling, and loss of impact resistance. The warranty transfers once to the next owner, who receives 50 years of coverage from completion date, making it an asset when you sell. Combined with the 30-year coating warranty on the Alunar finish and the durability of the aluminum itself, Interlock roofing is engineered as your last roof. In Randolph's climate with 82 annual freeze-thaw cycles, that non-prorated coverage protects you through decades of seasonal stress.

No. Interlock's Mediterranean Tile profile, which replicates the heaviest traditional look, installs at just 0.59 lb/sq ft—about 96% lighter than concrete or clay tile. The Slate runs 0.41 lb/sq ft and the Shake 0.58 lb/sq ft. Most existing roofs can support this weight without structural modification. Because aluminum panels are so light, you can often install Interlock directly over your existing asphalt shingles, eliminating tear-off labor and landfill fees. Your home's framing is already carrying the load of snow and weather; at less than 1 lb per square foot, a metal roof is negligible by comparison. Installers verify deck condition during the inspection, but reinforcement is rarely needed in Randolph.

Very little. Aluminum doesn't require the seasonal maintenance that asphalt, cedar shake, or traditional tile demands. No moss treatment, no algae cleaning, no wood sealing, no grout repointing. With about 3138 sunshine hours annually in Randolph, UV exposure is a concern for other materials, but the Alunar 70% PVDF fluorocarbon coating is rated 30 years against fading and chalking. Twice-yearly gutter cleaning keeps debris from pooling, and you can rinse panels with a garden hose if you notice dust buildup—that's it. Interlock is CALGreen-verified for reduced maintenance requirements. Most owners never climb the roof again after installation.

Yes. Interlock panels are approximately 95% recyclable, and aluminum's value as scrap means your old roof has residual worth. More importantly, metal roofing ends the asphalt tear-off-to-landfill cycle: your existing shingles don't go to the dump because you install over them, and when your metal roof eventually reaches end of life—in 50+ years—it goes to a recycling facility, not a landfill. Aluminum manufacturing is energy-intensive upfront, but the material's lifespan and recyclability offset that impact many times over a 50-year timeline. Randolph residents choosing metal over asphalt avoid contributing to landfill waste while gaining a roof that performs in the region's 831 mm annual rainfall and 96 cm snow load without degradation or premature replacement.

When you calculate the total cost over the roof's life, metal wins. Asphalt typically lasts 15–20 years and requires tear-off, disposal, and reinstallation; most Randolph homeowners replace their roof 2–3 times in a lifetime. Interlock's Guardian Warranty is lifetime non-prorated for the original owner and transfers 50 years to the next, so you buy once and own it. No replacement costs, no re-roofing labor, no weather-driven emergency repairs. Initial cost is higher per square foot, but spread across 40–50 years with zero major repairs and often a homeowner insurance discount (UL 2218 Class 4 rating), the per-year cost drops below asphalt. Resale value also improves: buyers recognize a metal roof as a 40-year asset, not a consumable good.

Interlock Metal Roofing has served this region since 2001, with deep expertise in Dakota County conditions. Our crews understand Randolph's roughly 97 km/h wind gusts, 82 annual freeze-thaw days, and mixed precipitation—and they're trained in ICC-ES ESR-1790 installation standards to ensure your roof performs to warranty. We inspect existing decks, recommend the right profile (Slate, Cedar Shingle, Shake, Standing Seam, or Tile) for your home's style, and handle the entire process from tear-off through final inspection. Local installation means faster response times, familiarity with local building permit requirements, and accountability—we're here long-term. Contact us for a free estimate and a walk-through of the process and timeline.

Yes. Randolph averages about 96 cm of snow, 831 mm of rain, roughly 82 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.