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

Metal roofs shed snow more effectively than asphalt because their smooth, hard surface prevents snow from bonding; the aluminum's thermal conductivity also helps prevent ice dams. Unity Township receives about 101 cm of snow annually across roughly 77 freeze-thaw days per year—conditions where ice dam risk is genuine. Interlock's interlocking panels and solid deck installation (which you can place over your existing roof) create a unified thermal layer that minimizes the temperature differential that causes dams. Optional snow guards can be installed if you need to manage avalanche-style shedding near walkways.

Aluminum is immune to the freeze-thaw damage that weakens asphalt and wood because it doesn't absorb water and has no grain structure to splinter. The material's oxide layer—which forms naturally on aluminum—actually self-heals when scratched, so seasonal expansion and contraction don't compromise it. With roughly 77 freeze-thaw cycles per year in Unity Township and an average winter temperature around 6°C, the continuous wet-dry cycling would eventually degrade asphalt shingles or wood shakes, but aluminum's non-porous nature means it simply cycles unchanged, year after year.

Aluminum cannot rust because rust is oxidized iron, and aluminum contains no iron. Instead, aluminum forms a transparent oxide layer that actually protects the underlying metal and self-heals when scratched. Interlock uses roofing-grade 3105-H24 and 3003-H24 aluminum (ASTM B209), coated with Alunar 70% PVDF fluorocarbon finish on both sides for extra durability. This dual-sided coating is especially important in regions with variable humidity like Chisago County, where seasonal shifts bring both wet springs and dry periods; the protection works year-round without requiring ongoing maintenance or sealant reapplication.

Yes. Interlock panels resist wind speeds up to 120 mph when installed to specification, and Unity Township's typical gusts reach about 103 km/h (64 mph)—well within safe margins. The four-way interlocking design of each panel locks to its neighbors on all sides, creating a unified surface that distributes wind load across the entire roof rather than stressing individual fasteners. This is why the warranty covers wind performance: during the high-gust spring and fall seasons, your roof won't lift, flutter, or separate. The system's proven performance on coastal and high-wind sites demonstrates its reliability in turbulent conditions far more severe than the average Chisago County day.

No structural reinforcement is needed. Interlock's Shake profile weighs about 0.58 lb/sq ft and the Mediterranean Tile profile weighs roughly 0.59 lb/sq ft—about 96% lighter than concrete or clay tile—so most existing homes can support a full Interlock installation without any framing upgrades. In fact, you can install Interlock directly over your current asphalt shingles, which often eliminates the cost and landfill burden of a tear-off. This lightweight advantage is especially valuable in Minnesota, where the alternative (installing traditional slate or tile) would require expensive structural modifications before any roofing work could even begin.

Interlock panels carry UL 2218 Class 4 impact rating—the highest available—and the Guardian warranty even covers perforation from hailstones up to 1.5 inches. Class 4 performance means the panel resists impact from 2-inch steel balls dropped from 20 feet without cracking or losing impact resistance. Some insurers offer discounts for Class 4-rated roofs because the actual damage rate is measurably lower than with asphalt. Ask your agent whether they recognize this rating; a 5-10% savings over 20 years can offset part of your roofing cost, and that's before accounting for the fact that Interlock simply won't need replacement after a major hail event like an asphalt roof would.

The Guardian warranty is a lifetime limited, non-prorated material warranty for the original owner—meaning if a panel fails, Interlock covers the material at no cost, whenever it fails. It covers rusting, rotting, splitting, cracking, curling, and loss of impact resistance. The warranty is also one-time transferable, giving the next owner 50 years of coverage from completion. That transferability significantly boosts resale value because buyers know the roof has documented protection. Combined with aluminum's resistance to freeze-thaw (77 cycles yearly in Chisago County), corrosion, and the 30-year coating warranty against chalking and fading, Interlock roofs often outlast the homes they're installed on—making it genuinely the last roof you'll buy.

Metal roofs require far less maintenance than asphalt, wood shake, or tile. Asphalt shingles need frequent repairs and eventual replacement; wood shakes split and rot, especially during Minnesota's roughly 77 freeze-thaw days yearly; tile cracks and leaks when settled. Interlock's solid aluminum and interlocking design eliminate the slow degradation that plagues these materials. After installation, you're mainly concerned with clearing debris from gutters—the same task you'd do with any roof. The CALGreen verification confirms reduced maintenance requirements. Since Interlock panels won't curl, crack, or delaminate as asphalt does during temperature swings, you won't face unexpected mid-winter repair calls or the cumulative cost of patching across 20+ years.

Yes, Interlock installs directly over most existing asphalt roofs—a huge advantage because it eliminates tear-off costs and landfill waste. Installation typically takes 3-5 days for a standard single-story home, depending on roof complexity and crew size. Over-roof installation works because Interlock's lightweight design (Slate at 0.41 lb/sq ft) doesn't overburden the existing deck, and the solid deck creates a continuous thermal layer that improves ice-dam resistance during Minnesota's freeze-thaw seasons. A local Interlock installer serving the region since 2001 can assess your existing roof and walk you through the options. Most homes complete the job in a single season, with no interior disruption, which minimizes the logistical burden compared to traditional roofing replacements.

Yes. Aluminum is approximately 95% recyclable, and Interlock roofs break the asphalt tear-off-to-landfill cycle—which sends millions of tons of old shingles to waste every year across North America. Because you can install Interlock directly over your existing roof without stripping it, you avoid that tear-off waste entirely. Aluminum recycling also requires far less energy than mining new aluminum, so end-of-life recycling is genuinely worthwhile. Over a 50-year lifespan (the transfer warranty term), you'll replace an asphalt roof 2-3 times, each time sending material to landfill; with Interlock, you install once and recycle once at the very end. For a environmentally conscious homeowner in Chisago County, this is a concrete way to reduce your building footprint.

Yes. Unity Township averages about 101 cm of snow, 557 mm of rain, roughly 77 freeze–thaw days a year, with peak wind gusts near 103 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.