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

Metal roofs shed snow and ice more effectively than asphalt because the smooth, hard surface prevents water from refreezing at the edge — a key advantage in a climate that experiences about 74 freeze-thaw days per year. Interlock's four-way interlocking panels lock together so tightly that snow cannot penetrate seams, and the lightweight aluminum (the Cedar Shingle profile weighs just 0.41 lb/sq ft) won't accumulate dangerous loads. We can install snow guards to control slide-off if you prefer, but the real win is that freeze-thaw cycling that degrades asphalt shingles leaves aluminum untouched — the metal's oxide layer simply self-heals when stressed.

No — aluminum's structural behavior is fundamentally different from materials that absorb moisture and crack. Unlike asphalt, wood, or concrete, roofing-grade 3105-H24 aluminum alloy (ASTM B209) expands and contracts uniformly without losing integrity, so the roughly 74 annual freeze-thaw days in Garrison won't degrade the panels or joints. The Alunar 70% PVDF fluorocarbon coating, warranted for 30 years against chalking and fading under those temperature swings, protects against UV and salt damage simultaneously — a critical pairing when winter sunshine (about 3,125 hours annually) accelerates weathering. Asphalt shingles, by contrast, become brittle in cold and crack from thermal cycling.

Garrison's typical wind gusts reach about 106 km/h, and Interlock roofs are warranted to resist wind speeds up to 120 mph (193 km/h) when installed to specification. The four-way interlocking aluminum panels lock together so securely that wind cannot lift a single panel without breaking it first — the connection is that strong. ICC-ES evaluation report ESR-1790, the code standard for residential metal roofing nationwide, certifies this installation method. Compare that to asphalt shingles, which are nailed down and begin to lift and fail at much lower wind speeds. Once Interlock panels are installed, they're not going anywhere, even during the worst seasonal gusts.

Metal roofing's resilience to hail is measurable: Interlock achieves UL 2218 Class 4 impact rating — the highest hail classification available — and the Guardian Warranty even covers perforation from hailstones up to 1.5 inches. That durability often qualifies you for homeowner's insurance discounts because metal roofs resist damage that would total an asphalt roof. Garrison experiences spring and summer weather patterns where hail can occur, and aluminum's non-denting hardness means your roof will survive impacts that would puncture or strip away asphalt shingles, triggering costly claims. Many insurers recognize this and adjust premiums accordingly — contact yours with the UL 2218 Class 4 rating to explore savings.

energy-efficient Interlock colors reflect rather than absorb solar heat, with initial solar reflectance up to 0.55 and thermal emissivity of 0.84 — ratings verified by the Cool Roof Rating Council. In Garrison's 3,125 annual sunshine hours, that reflection cuts the heat load that asphalt absorbs and transmits into your attic and living spaces. Even in a heating-dominated climate, the reflective benefit reduces peak summer cooling demand, and the lightweight aluminum allows better attic ventilation without sagging. Over a 50-year roof life, the energy savings compound significantly — you're essentially capturing the sun's energy and bouncing it back to space instead of paying to cool against it.

Installation speed depends on roof size and complexity, but because Interlock panels are lightweight — the Mediterranean Tile profile weighs just 0.59 lb/sq ft, about 96% lighter than concrete or clay tile — crews work safely and efficiently without structural reinforcement. Most residential roofs install in 2–4 days. A major advantage in Minnesota weather: because the panels are so light, installation can often occur over your existing roof (no tear-off needed in many cases), which shortens the project timeline and eliminates the landfill cost of asphalt removal. Our local installer, serving the region since 2001, can schedule around seasonal rainfall (about 645 mm annually) and advise on the best installation window for your roof's age and condition.

Over a 50-year lifespan, aluminum roofing is almost always cheaper than asphalt when you account for replacements. Asphalt shingles last 15–20 years in Minnesota's climate; in that same 50 years, you'd replace asphalt 2–3 times, each time tearing off the old roof (landfill cost) and paying labor again. Interlock's Guardian Warranty covers the original owner for life against rusting, rotting, splitting, cracking, and impact failure — no prorated deductibles — and transfers to the next owner for 50 years. You buy Interlock once; asphalt you buy multiple times. Factor in that metal roofs often qualify for insurance discounts and energy savings, and the total cost of ownership favors metal decisively by your roof's 30th year.

The Guardian Warranty is a lifetime limited, non-prorated material warranty for the original owner — it covers rusting, rotting, splitting, cracking, curling, and loss of impact resistance with no deductible or time-based payout reduction. For the next owner, the warranty transfers once and extends 50 years from completion, making your roof a substantial selling point and protecting two generations of ownership. The Alunar fluorocarbon coating itself is warranted 30 years against chalking and fading, tested to ASTM D4214 and D2244 standards. No asphalt shingle or even many premium metal roof brands offer this combination of scope and transferability — it reflects the durability aluminum delivers in Minnesota's demanding freeze-thaw and UV environment.

Aluminum metal roofs require virtually no maintenance compared to asphalt, wood, or traditional tile. Because aluminum cannot rust, there's no rust removal or touch-up painting; the self-healing oxide layer handles that automatically. Garrison's roughly 645 mm of annual rainfall simply rinses the Alunar coating, which is rated for 30 years against chalking and fading. Asphalt shingles require inspection after every severe weather event, often lose granules (exposing bare asphalt to UV), and need repairs before they leak — a cycle repeated every few years in a freeze-thaw climate like Minnesota's. Metal roofs are CALGreen-verified for reduced maintenance, meaning fewer trips up a ladder, no emergency calls after hail or wind, and no degradation to manage over decades. You inspect it visually once a year; that's it.

Interlock manufactures five distinct profiles: Slate (classic flat appearance), Cedar Shingle (traditional shake aesthetic), Shake (hand-split wood look), Mediterranean Tile (curved barrel tile), and Standing Seam (contemporary vertical ribs). Each profile is available in multiple colors and finishes, so you can match historic Mille Lacs County architecture or design a modern home without compromising durability. Unlike wood shingles or concrete tiles, all five profiles are identical in performance — UL 2218 Class 4 hail rating, 120 mph wind warranty, 30-year coating protection — so you choose your style freely. Whether you want your roof to echo traditional materials or stand out with contemporary design, Interlock gives you that aesthetic choice backed by aluminum's structural and environmental advantages.

Yes. Garrison averages about 106 cm of snow, 645 mm of rain, roughly 74 freeze–thaw days a year, with peak wind gusts near 106 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.