Metal Roofing in Inver Grove Heights, Minnesota — Lifetime Interlock® Aluminum Shingles Installed Locally

Yes—aluminum expands and contracts uniformly, and its oxide layer self-heals when scratched, so freeze-thaw cycling won't degrade it the way it splits wood shakes or causes asphalt to crack. Inver Grove Heights experiences about 81 freeze-thaw days per year, which is brutal on brittle materials. Interlock's 3105-H24 aluminum alloy (ASTM B209) is engineered for exactly this stress. Your roof won't develop the crazing, curling, or spalling you'd see in asphalt after 10 years of that cycling.

Metal roofs shed snow more efficiently than asphalt because of their smooth, interlocking surface and metal's thermal conductivity—heat radiates slightly, reducing ice dam buildup. With about 94 cm of snow per year, you'll appreciate the four-way interlocking panels that prevent snow infiltration at seams. If ice dams do form, you can install optional snow guards to manage runoff. The light weight of Interlock panels means no structural reinforcement is needed, unlike slate or concrete tile, so your home's framing handles the seasonal load easily.

Aluminum cannot rust because it contains no iron—the element that oxidizes and causes structural failure in steel roofing. Instead, aluminum develops a transparent, self-healing oxide layer that protects it indefinitely. In Minnesota's climate, with ~843 mm of rain and ~18 km/h typical winds, this is a major advantage over steel, which will eventually perforate. Interlock panels are also coated on both sides with Alunar® 70% PVDF fluorocarbon finish, warranted 30 years against chalking and fading. That dual protection means your roof won't corrode, rust through, or require the maintenance steel roofs demand.

Inver Grove Heights sees typical gusts around 95 km/h, and Interlock's four-way interlocking aluminum panels are warranted to resist wind speeds up to 120 mph (193 km/h) when installed to specification. The panels lock together on all four sides, creating a unified system that distributes wind load across the entire roof rather than putting stress on individual fasteners like asphalt shingles do. You'll get a UL 2218 Class 4 impact rating and genuine wind protection, not just marketing claims. That warranty matters when spring storms hit.

Many insurers offer discounts for UL 2218 Class 4-rated roofs because they virtually never fail under hail. Interlock panels achieve the highest impact rating available and are even warranted against perforation from hailstones up to 1.5 inches. Ask your agent about discounts before you decide—some carriers recognize that metal roofs lower claim frequency. Whether or not you get a premium reduction, you'll avoid the deductible and hassle of hail repairs that plague asphalt roofs every few years. That's real savings in a region where severe weather is part of the cycle.

Yes. An asphalt roof lasts about 15–20 years in Minnesota's climate—with 81 freeze-thaw days per year, you're replacing it twice or three times over a 50-year span. Metal costs more upfront but carries a lifetime limited, non-prorated warranty and won't need replacement. Factor in tear-off labor, landfill fees, and new installation each cycle, and metal becomes the last roof you buy. The Guardian Warranty is transferable to the next owner for 50 years, which also protects your resale value. Over the building's life, you're not choosing between roofs—you're choosing between replacing one or paying for three.

The Guardian Warranty is a lifetime limited, non-prorated material warranty for the original owner, covering rusting, rotting, splitting, cracking, curling, and loss of impact resistance—basically every failure mode a roof can suffer. It's transferable, giving the next owner 50 years of coverage from completion. In practice, aluminum roofs last 40+ years without meaningful degradation. Interlock has been manufacturing since 1998 and has installations in everything from coastal salt-air homes to Antarctica, so the material science is proven. Combined with the 30-year Alunar® coating warranty, you're protected against fading and oxidation for decades.

Significantly less. Asphalt requires annual inspections, shingle replacement, and moss/algae treatment, especially in Minnesota's ~3110 annual sunshine hours and frequent moisture. Wood shakes split, rot, and need chemical treatment every few years. Metal doesn't absorb water, won't rot, and doesn't support mold the way asphalt does. Interlock panels are CALGreen-verified for reduced maintenance. You'll hose off debris a couple of times per year—that's it. No fungicide, no patching, no annual dread that this winter will be the one that fails your roof.

energy-efficient Interlock colors reflect more solar heat than asphalt absorbs, with reflectance up to 0.55 (Aged Copper Penny) and thermal emissivity of 0.84. That means less heat penetrating into your attic during the 3110 annual sunshine hours. On days above 75°F, the savings add up—especially if you have air conditioning. The impact is smaller in Minnesota than in the South, but it still helps reduce peak summer cooling load. More importantly, a lighter-colored metal roof won't turn your attic into an oven during those rare, hot summer days, extending HVAC equipment life.

Interlock installs directly over existing asphalt or wood roofs in most cases—no tear-off required. The panels are extraordinarily light: the Shingle profile weighs about 0.41 lb/sq ft, the Shake about 0.58, and even the Mediterranean Tile (which replicates heavy clay) weighs just 0.59 lb/sq ft—about 96% lighter than real tile—so no structural reinforcement is needed. Installation typically takes 3–7 days depending on roof size and complexity. By avoiding a tear-off, you save labor, dump fees, and disruption. Interlock has served the region since 2001, so your installer knows Minnesota's snow load and wind requirements inside out.

Yes. Inver Grove Heights averages about 94 cm of snow, 843 mm of rain, roughly 81 freeze–thaw days a year, with peak wind gusts near 95 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.