Metal Roofing in Plymouth, Minnesota

Aluminum panels shed snow and ice far more effectively than asphalt because their smooth, hard surface prevents ice dams—a critical advantage in a region that averages about 95 cm of snow and 79 freeze-thaw days annually. The four-way interlocking system is warranted to 120 mph wind speeds, so snow guards stay secure during the gusty conditions common here (gusts to 94 km/h). Unlike asphalt, which becomes brittle in repeated freeze-thaw, aluminum's oxide layer remains flexible; it self-heals when scratched, so winter salt and debris won't trigger corrosion.

Aluminum cannot rust because it contains no iron—the element that oxidizes in water. Instead, aluminum develops a thin, transparent oxide layer that protects the metal underneath and actually self-heals when scratched by ice, snow, or salt. Plymouth's 796 mm of annual rainfall and road salt exposure would devastate steel roofs, but Interlock's 3105-H24 roofing-grade aluminum resists both. The Alunar 70% PVDF fluorocarbon coating on both sides adds a second barrier, warranted 30 years against degradation—giving you double protection in a freeze-thaw climate.

Yes. Interlock panels carry a UL 2218 Class 4 impact rating—the highest available—and the Guardian Warranty explicitly covers perforation from hailstones up to 1.5 inches. That proven durability often qualifies you for insurance discounts because claims are rare. Given that the region experiences 3128 sunshine hours yearly and occasional severe weather, a non-combustible aluminum roof (Class A fire rating available per ICC-ES ESR-1790) that resists both hail and wind gusts up to 94 km/h represents lower risk in your insurer's eyes. Contact your agent with the UL rating and warranty details to explore savings.

Over the life of your home, yes. Asphalt shingles last 15–20 years in Minnesota's 79 annual freeze-thaw days and require regular maintenance; a metal roof is your final roof. The Guardian Warranty is lifetime limited and non-prorated for the original owner—it covers rusting, cracking, curling, and loss of impact resistance. When you sell, the warranty transfers to the next owner for 50 years from completion, adding resale value. Factor in zero maintenance, no tear-off waste, no reroofing every 15 years, and 120 mph wind coverage in a climate where gusts reach 94 km/h, and the total cost of ownership favors aluminum over multiple asphalt cycles.

Virtually none. Unlike asphalt, which requires regular inspection and repair as it degrades through freeze-thaw cycles, Interlock's aluminum roof resists the 79 freeze-thaw days Plymouth experiences each year without cracking, curling, or splitting. Unlike wood shake, it won't rot or attract insects. Unlike clay or concrete tile, it won't break. Occasional gutter cleaning during fall (given 796 mm annual rainfall) and a rinse after heavy snow keeps it clean. The Alunar 70% PVDF coating—rated 30 years against chalking—means the finish stays vibrant without power washing or resealing. CALGreen verification confirms the reduced maintenance burden.

Yes. Interlock aluminum panels are non-combustible and available in profiles that achieve Class A fire classification. That's the highest fire rating available, certified per ICC-ES evaluation report ESR-1790 (current through 2025). Because aluminum cannot burn and contains no organic components, it won't contribute to fire spread—a meaningful safety upgrade in any home, especially given 3128 annual sunshine hours and the wind gusts to 94 km/h that can push embers during wildfire season. Your homeowner's insurance may also recognize the non-combustibility; check with your agent on potential rate benefits.

Yes. One of Interlock's key advantages is that the lightweight panels—Slate at 0.41 lb/sq ft, Shake at 0.58, Tile at 0.59—can install directly over existing asphalt without removing it, eliminating the labor and landfill cost of a tear-off. Our local installer has served the region since 2001 and installs to ICC-ES ESR-1790 specification, which confirms roof-over compatibility. Installation is clean and fast: panels interlock four ways for structural rigidity, so no repeated fastening delays the job. In Plymouth's climate, where you can expect about 95 cm of snow, the solid deck and underlayment ensure sound is asphalt-quiet—no rain noise—and thermal performance stays consistent year-round.

energy-efficient colors with solar reflectance up to 0.55 (Aged Copper Penny profile) reflect heat that asphalt absorbs, lowering cooling costs in warmer months. The thermal emissivity rating of 0.84 means the roof releases trapped heat efficiently. While Plymouth's mean temperature is about 8°C annually and you experience 95 cm of snow per year, summer cooling still costs money—and a reflective metal roof reduces that load compared to dark asphalt. Cool Roof Rating Council certification confirms the thermal performance. The benefit is year-round: in winter, the solid deck traps interior heat; in summer, the reflective finish sheds it. That balance makes aluminum efficient across both seasons.

Yes. A durable, attractive roof that lasts 50+ years—with the guardian warranty transferring to the next owner for half a century—is a major selling point. Buyers recognize that they won't need a new roof in 15 years, eliminating a large future expense. The profiles—Slate, Cedar Shingle, Shake, Mediterranean Tile, Standing Seam—offer the aesthetic appeal of premium materials without the fragility of actual wood, slate, or clay. In a region experiencing 79 freeze-thaw cycles yearly and 3128 sunshine hours, a Class A fire-rated, impact-resistant (UL 2218 Class 4) roof signals that you've invested in durability. Transferability of the 50-year coverage is particularly attractive; it gives your buyer peace of mind through winter storms, hail, and the region's notorious wind gusts to 94 km/h.

Significantly. Interlock panels are approximately 95% recyclable aluminum; at end of life, they're worth scrap value and return to the material stream indefinitely. Asphalt shingles, by contrast, end the tear-off cycle every 15 years—millions of pounds to landfills annually. In Plymouth, where you'd reroof every 15–20 years due to freeze-thaw stress, choosing aluminum eliminates multiple tear-off events over your home's lifetime. Manufactured since 1998 in Delta, BC, the panels have logged real-world service from coastal salt-air homes to an Antarctic research station—proving durability that matches the climate. The single installation, no maintenance, no replacement, and full recyclability at end of life make aluminum roofing the environmentally responsible choice for a home in Minnesota's 796 mm rainfall and 79 freeze-thaw cycle zone.