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

Aluminum roofs shed snow and ice far better than asphalt because the smooth, hard surface prevents adhesion—critical in Andover, where you see roughly 79 freeze-thaw days per year. The four-way interlocking panels stay watertight even when snow melts and refreezes, unlike shingles that can cup and crack under those same cycles. Snow guards are available if you want to retain snow for insulation or prevent slides. The lightweight construction (Shake profile at 0.58 lb/sq ft) means zero structural reinforcement needed, even with heavy accumulation, making it dramatically safer than slate or tile in a freeze-thaw climate.

Interlock panels are aluminum (3105-H24 and 3003-H24 alloy per ASTM B209), not steel—aluminum contains no iron, so it cannot rust, period. Even if the surface is scratched, aluminum's oxide layer self-heals naturally. Combined with the Alunar 70% PVDF fluorocarbon finish on both sides, your roof is protected against the corrosive wet cycles Andover's 796 mm of annual rainfall creates. That dual-side coating is especially valuable in freeze-thaw regions, where moisture penetrates crevices; the bottom-side finish stops corrosion before it starts. This is why Interlock panels have been installed from coastal salt-air homes to an Antarctic research station—no maintenance rust watch required.

The Guardian is a lifetime limited, non-prorated material warranty for you as the original owner—covering rusting, rotting, splitting, cracking, curling, and loss of impact resistance. It's transferable once, giving the next owner 50 years of coverage from completion, which is a strong selling point if you ever move. In practice, the aluminum and 30-year Alunar coating warranty mean you're looking at decades past the lifespan of asphalt. Manufactured since 1998, thousands of Interlock roofs installed in 2001 are still performing flawlessly. For Andover's 19 km/h average winds with gusts to 94 km/h, that non-prorated coverage is peace of mind.

Interlock panels carry a UL 2218 Class 4 impact rating—the highest available—and the warranty even covers perforation from hailstones up to 1.5 inches. That Class 4 rating often qualifies homeowners for insurance discounts, sometimes 20–35% depending on your insurer; ask your agent to confirm coverage for your specific roof profile. With Andover's 3128 sunshine hours per year and typical spring/summer storm patterns, Class 4 impact resistance protects your investment from the hail events Minnesota sees. Unlike asphalt (Class 1) or wood shakes, aluminum doesn't dent easily and retains its structural integrity after impact, so you're less likely to file claims at all.

Yes—Interlock offers five profiles: Slate, Cedar Shingle, Shake, Standing Seam, and Mediterranean Tile, each mimicking the dimensional texture of its namesake. The Slate and Cedar Shingle profiles are popular in Minnesota for homes with traditional architecture; the Shake delivers that rugged, split-wood appearance without the maintenance burden; the Tile gives Mediterranean or Spanish-colonial styling; and the Standing Seam is the modern industrial choice. All use the same four-way interlocking aluminum (0.41–0.59 lb/sq ft depending on profile) and Alunar 30-year finish. Your curb appeal comes from authentic-looking texture, not from industrial corrugation, and every profile handles Andover's 95 cm of snow and 79 freeze-thaw days identically well.

Interlock's energy-efficient colors reflect more solar heat than asphalt absorbs, reducing cooling demand on hot days—valuable when Andover records 3128 hours of annual sunshine. The Aged Copper Penny color, for example, achieves initial solar reflectance of up to 0.55 and thermal emissivity of 0.84 per Cool Roof Rating Council standards, meaning it bounces heat away rather than storing it. In summer, this can lower air-conditioning costs; in winter, the reflective surface doesn't interfere with passive solar gain when the sun is low. Across a 40-year roof life, the energy savings compound, especially if you're replacing dark asphalt. The lightweight aluminum (no structural reinforcement needed) also allows better ventilation paths, improving overall thermal performance.

No. The Mediterranean Tile profile, for example, installs at roughly 0.59 lb/sq ft—about 96% lighter than actual clay or concrete tile—and the Shake profile at 0.58 lb/sq ft. Compare that to slate (around 7–10 lb/sq ft) or clay tile (8–12 lb/sq ft), and you see why aluminum is transformative for older homes. You can install Interlock over most existing roofs without reinforcement, saving thousands in structural work. Even Andover's heaviest snow loads (95 cm annual average, with freeze-thaw adding weight from ice dams) are trivial for these panels on a standard residential framing. Asphalt shingles weigh roughly 2–3 lb/sq ft, so a metal roof upgrade costs less structurally than you might assume.

Interlock can install over most existing asphalt or other roofing, saving the cost and mess of a complete tear-off—a significant advantage in Minnesota, where old roofs often end up in landfills. Installation typically takes 2–5 days depending on roof complexity and weather. Andover's 796 mm of annual rainfall means crews must watch the forecast carefully, but the interlocking design and lightweight aluminum (no structural delays) keep timelines predictable. Your local installer, Interlock Metal Roofing, has served the region since 2001 and understands Minnesota conditions. After installation, the solid deck and underlayment make the roof as rain-quiet as asphalt—a common concern that the product itself eliminates.

Aluminum requires virtually no maintenance. Unlike asphalt shingles that cup and lose granules, or wood shakes that split and rot (especially under Andover's 79 annual freeze-thaw days), Interlock panels are non-combustible, non-rotting, and non-splitting by material. The Alunar 30-year coating is warranted against chalking and fading (ASTM D4214/D2244), so repainting is never required. Your only tasks are clearing gutters and, in heavy snow regions, inspecting flashings after extreme weather—no more than asphalt demands, but without the aging crisis. CALGreen verification confirms reduced maintenance burden. With 3128 sunshine hours per year, Andover's dry periods naturally shed debris and moss, so the self-healing oxide layer keeps the roof looking fresh without power-washing.

Absolutely. Interlock's aluminum is approximately 95% recyclable at end-of-life, so it cycles back into the material stream rather than landfill. In contrast, asphalt tear-offs generate tons of non-recyclable waste—a hidden cost of traditional reroofing that most homeowners don't calculate. Over a 40+ year roof life, choosing aluminum means zero tear-off cycles versus multiple asphalt replacements. The lightweight panels also reduce manufacturing and transport energy compared to slate or tile. Interlock has been manufactured in Delta, BC, since 1998, minimizing supply-chain distance for the region. For Andover homeowners committed to reducing their environmental footprint, one non-recyclable roof departure is a significant win, especially given Andover's 3128 hours of sunshine creating ideal conditions for energy-efficiency performance.