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

Aluminum panels shed snow naturally because they're smooth and slippery—ice and snow don't build up the way they do on asphalt. New Trier gets about 96 cm of snow annually and roughly 82 freeze-thaw days per year, which means your roof faces constant stress from expanding and contracting. Aluminum's strength and the four-way interlocking design mean panels stay locked tight through those cycles without splitting or cracking like wood or asphalt shingles do. The lightweight construction also means snow load isn't a structural problem—no reinforcement needed.

Freeze-thaw damage happens when moisture gets trapped inside a material, freezes, expands, and cracks it from the inside. Aluminum is non-porous—water doesn't soak into it. With 82 annual freeze-thaw days in New Trier and 831 mm of rain per year, asphalt eventually saturates and splits; wood rots and curls. Aluminum simply doesn't absorb water, so expansion cycles can't happen. The four-way interlocking seams also shed water outward immediately, keeping moisture away from the substrate entirely.

Aluminum cannot rust because it contains no iron—rusting is an iron-only problem. What happens instead is that aluminum naturally forms a thin oxide layer when exposed to air and moisture, and this layer actually heals itself when scratched. Minnesota's freeze-thaw cycles and 831 mm of annual rainfall create ideal conditions for corrosion, which is why steel roofs fail in climates like this. Interlock's 3105-H24 aluminum alloy is the roofing-grade material built for durability, and the Alunar® 70% PVDF coating on both sides adds 30 years of extra protection against any surface degradation.

Yes—Interlock panels are warranted to resist winds up to 120 mph, and New Trier's typical gusts reach about 97 km/h (60 mph). The four-way interlocking system locks each panel to its neighbors on all four sides, so wind pressure can't separate them or lift edges. Unlike asphalt shingles that can tear and curl in moderate wind, these panels move as one unified system. With gusts regularly approaching the higher end of New Trier's range, that interlocking design is what keeps you covered.

Interlock panels carry a UL 2218 Class 4 impact rating—the highest available—and the warranty covers hailstone impacts up to 1.5 inches. New Trier sits in hail territory, and homeowners sometimes qualify for insurance discounts on metal roofs because of their proven hail resistance. Asphalt shingles dent easily and lose their protective granules after hail; aluminum is non-combustible and actually rebounds under impact without permanent deformation. Contact your insurance agent with the UL 2218 Class 4 rating and see what premium reduction you might get—it often pays back part of your material cost over time.

In New Trier's climate—3138 annual sunshine hours and mean temperatures around 8.2°C—cooling isn't the primary concern, but reflective metal roofing still saves you energy money on air-conditioning days. energy-efficient Interlock colors have solar reflectance up to 0.55 and emissivity of 0.84, meaning they bounce back heat that asphalt absorbs and re-radiates into your home. Over a long roof life, those summer cooling savings add up. The real win in Minnesota is winter: a reflective metal roof won't prematurely melt snow, so you keep the insulation that snow provides, and you avoid ice-dam problems that cost money to fix.

No—that's the practical advantage of aluminum. Interlock's Cedar Shingle profile installs at just 0.41 lb/sq ft, and the Mediterranean Tile profile (which mimics heavy tile) weighs only 0.59 lb/sq ft—roughly 96% lighter than real clay or concrete tile. Most homes can handle metal roofing without any structural work. This matters in New Trier because it means you can install directly over an existing asphalt roof most of the time, which saves thousands in tear-off costs and landfill fees. Your framing was already handling its own weight; this just replaces the roof without asking more of the structure.

Metal roofing requires virtually no maintenance—no annual inspections, no repairs, no replacement of damaged shingles or rotted wood. Asphalt shingles need regular checks and repairs as they curl and granulate; wood shingles rot and split in Minnesota's 82 annual freeze-thaw days; tile cracks and requires professional replacement. Interlock panels are sealed by the interlocking system itself, they don't deteriorate, and the Alunar® coating is CALGreen-verified for reduced maintenance. About the only task is clearing gutters of debris—the same as any roof. That 831 mm of annual rain just slides off.

Yes, if you're thinking long-term. Asphalt roofs last 15–25 years in Minnesota's freeze-thaw climate and require at least one full replacement during your ownership, plus tear-off costs and landfill fees. An Interlock metal roof carries a lifetime limited non-prorated warranty for you as the original owner, and it's transferable—the next owner gets 50 years of coverage from completion. That means one installation, one warranty, one roof. After 25 years when asphalt fails again, your metal roof is still performing. Over a 40–50 year span, you're looking at asphalt's higher total cost of ownership, no question.

Yes, and that's standard practice. Because Interlock panels weigh so little—the Shingle profile at just 0.41 lb/sq ft—you can install directly over your existing roof in most cases, which eliminates tear-off labor and debris disposal. A typical residential installation takes a few days, depending on roof pitch and complexity. You'll need a solid deck underneath and proper ventilation, which your installer verifies. The process is cleaner than a tear-off, faster than reroofing with asphalt shingles, and it means no disruption to your home's interior while work is happening. Interlock has served the region since 2001 and handles all the details.

Yes. New Trier averages about 96 cm of snow, 831 mm of rain, roughly 82 freeze–thaw days a year, with peak wind gusts near 97 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.