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

Metal roofs shed snow effectively due to their smooth, hard surface and tight interlocking seams—critical in Washington Lake Township, where you average about 92 cm of snow annually and experience roughly 78 freeze-thaw days per year. The four-way interlocking aluminum panels eliminate the gaps where ice dams form. Unlike asphalt, aluminum's oxide layer doesn't crack or become brittle during freeze-thaw swings, so the roof maintains its seal year after year without the splitting and curling that plague traditional shingles.

Aluminum contains no iron, so it physically cannot rust—that's a chemistry fact, not marketing. Instead, it forms a thin, self-healing oxide layer that actually protects the metal underneath. Steel roofs, by contrast, must rely entirely on their paint or coating to prevent corrosion; once that coating is scratched (by ice, snow removal, or foot traffic), rust begins eating away. With 773 mm of annual rainfall in your area, choosing a material that rusts at the molecular level risks costly failures within 15–20 years.

Yes—aluminum's properties make it one of the few roofing materials that actually improves under freeze-thaw stress. The metal expands and contracts predictably without developing the micro-fractures that weaken asphalt, wood, or concrete tile over 78 freeze-thaw cycles per year. The three-mil Alunar PVDF coating (same fluorocarbon used on aircraft) flexes with the aluminum and is warranted 30 years against chalking and fading under ASTM testing, so repeated thermal cycling doesn't degrade the finish. Asphalt shingles lose granules and crack; aluminum simply returns to its original state.

Your region experiences typical gusts around 103 km/h (about 64 mph), well within the roof's design. Interlock panels are warranted to resist wind speeds up to 120 mph when installed to specification, thanks to four-way interlocking that creates a continuous, unified surface rather than thousands of separate shingles. Each panel locks on all four sides, so uplift forces that peel asphalt shingles away from the deck instead distribute across the entire roof assembly. This engineering detail is why the warranty explicitly covers wind performance—something asphalt manufacturers rarely do.

No structural reinforcement is needed. The Mediterranean Tile profile, which visually mimics expensive clay or concrete tile, weighs just ~0.59 lb/sq ft—about 96% lighter than the material it replicates. Even the heavier Shake profile at ~0.58 lb/sq ft is still a fraction of traditional tile weight. Most homes can install Interlock directly over existing asphalt shingles without adding a single truss or beam, which saves tens of thousands in structural engineering and labor. This weight advantage matters when budget and timeline are tight.

Interlock achieves the highest hail impact classification available: UL 2218 Class 4, which means it resists impacts from 2-inch hailstones without loss of function. The warranty even covers perforation from hailstones up to 1.5 inches. Aluminum's inherent dent-resistance (it flexes rather than cracks like asphalt or wood) combined with the robust alloy (3105-H24 / 3003-H24 per ASTM B209) means your roof survives what would total an asphalt roof. Many insurance companies recognize this durability and offer discounts; contact your agent with the UL 2218 Class 4 rating to discuss potential savings.

Reflecting heat rather than absorbing it cuts cooling costs, especially on sunny days—Washington Lake Township receives about 3209 sunshine hours per year. energy-efficient colors achieve thermal emissivity of 0.84 and solar reflectance up to 0.55, meaning they bounce back the infrared radiation that asphalt absorbs and converts to heat in your attic. The Aged Copper Penny finish, for example, reflects heat while looking warm and natural from the street. Over a 30-year lifespan, this reflectivity compounds into measurable energy savings and keeps your home cooler during Minnesota's warmer months without costly air-conditioning upgrades.

Yes, when you calculate the full lifecycle. Asphalt lasts 15–25 years and then you pay to remove and landfill it; Interlock is warranted for the lifetime of your ownership (transferable to the next owner for 50 years), with a non-prorated material warranty covering rusting, rotting, splitting, cracking, and curling. After the first roof, you never replace it again. Factor in asphalt's rising tear-off costs, re-shingling labor, and the fact that you'll likely reroof twice in the time Interlock lasts once, and the aluminum roof becomes the cheaper option by tens of thousands of dollars—before considering energy savings, insurance discounts, or resale value.

Far less than asphalt, wood shake, or tile. Aluminum won't rot, split, curl, or require periodic treatments. Gutters need cleaning (same as with any roof), and after heavy snow you may want to clear the roof if ice dams are a concern—but the interlocking design actually prevents most ice dams from forming. The Alunar PVDF coating (applied to both sides) resists algae and mineral staining, so you don't face the green-roof problem common in humid climates. With 92 cm of snow and 773 mm of rain annually, a self-cleaning surface that doesn't degrade is a major advantage. CALGreen verification confirms reduced maintenance requirements versus traditional materials.

Yes—one of the largest advantages for homeowners. Because aluminum roofing is so light (~0.41 lb/sq ft for Shingle profile), it typically installs directly over existing asphalt without stripping the old roof. This eliminates debris removal, labor, and landfill fees, cutting weeks off the timeline and thousands from the project cost. A full installation on a typical home takes 3–7 days depending on roof pitch and weather (rain and snow are common in Washington Lake Township, but cold doesn't slow the install). The local Interlock team has been serving this region since 2001 and coordinates with your existing roof to ensure proper ventilation and drainage underneath.

Yes. Washington Lake Township averages about 92 cm of snow, 773 mm of rain, roughly 78 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.