Metal Roofing in Sharon, Wisconsin — Lifetime Interlock® Aluminum Shingles Installed Locally

Yes—the smooth, hard surface of aluminum sheds snow and ice far more effectively than asphalt's porous texture, which traps moisture and accelerates ice dam formation. Sharon receives about 84 cm of snow annually, and the four-way interlocking aluminum panels create a slippery surface that naturally slides buildup away rather than holding it. Aluminum's non-corrosive 3105-H24 alloy remains structurally sound through repeated freeze-thaw cycles (you'll experience roughly 83 per year here), whereas asphalt becomes brittle and cracks. Metal roofing also won't rot or absorb meltwater, so your roof stays dry underneath when winter transitions hit.

Aluminum physically cannot rust because it contains no iron—that's the key difference from steel. Instead, aluminum forms a microscopically thin oxide layer that self-heals when scratched, protecting the metal beneath for decades. Steel requires constant paint maintenance and will eventually corrode through, especially in Sharon's 838 mm annual rainfall. Interlock's aluminum panels are coated with Alunar 70% PVDF fluorocarbon finish on both sides, warranted 30 years against chalking and fading (ASTM D4214/D2244), so even if the coating wears, the underlying aluminum won't rust. This means a true last roof—no hidden rust surprises down the road.

The Guardian Warranty is a non-prorated material warranty for the original owner covering rusting, rotting, splitting, cracking, curling, and loss of impact resistance—essentially everything a homeowner fears. After you sell, it's transferable to the next owner for 50 years from completion, which adds serious resale credibility. No time limit means no fine print expiration after 10 or 20 years; if the aluminum fails (which it won't) or the coating fails (unlikely given the 30-year coating warranty), Interlock replaces it at no cost during your ownership. That's why it's marketed as your last roof—the math shows aluminum outlasts asphalt by 2-3 roof cycles, so you're not re-roofing Sharon's freeze-thaw winters again.

No structural reinforcement is needed. The Mediterranean Tile profile weighs just 0.59 lb/sq ft—about 96% lighter than concrete or clay tile—so most homes can install it directly over an existing asphalt roof without upgrades. Even the heavier Shake profile is only 0.58 lb/sq ft. A typical asphalt roof already supports roughly 2–3 lb/sq ft of material and weather loads; aluminum comes in so light that your house structure actually experiences less stress than it does today. This also means no costly beam or truss work, no contractor delays waiting for an engineer's stamp, and the ability to install over existing shingles in one pass, saving thousands in tear-off labor during Sharon's short roofing season.

The four-way interlocking aluminum panels are warranted to resist wind speeds up to 120 mph when installed to spec—well above Sharon's typical gust maxima of about 100 km/h (62 mph). The interlocking design means each panel locks into its neighbors on all four sides, distributing wind load across the entire system rather than relying on fasteners alone. UL 2218 Class 4 impact testing confirms the panels' structural resilience under extreme stress. Local installation by Interlock's team since 2001 ensures fastening follows the engineering details in ICC-ES report ESR-1790 (reissued 2025), so wind warranty claims are rare; the roof simply performs as designed through Wisconsin's seasonal gusts.

Aluminum has a linear expansion coefficient (about 23.1 ppm/°C) that allows it to flex slightly with temperature swings—unlike asphalt, which becomes rigid and brittle, or wood shakes, which split when water freezes inside the grain. Sharon experiences roughly 83 freeze-thaw days annually, a severe stress test that degrades asphalt fast; aluminum's crystalline structure simply cycles without damage. The 3105-H24 aluminum alloy (ASTM B209) maintains its temper through repeated warming and cooling, so micro-fractures never initiate. Combined with the factory-applied Alunar coating on both panel sides (top and underside), there's no moisture pathway into the substrate, so ice expansion within the material is impossible. Your roof stays intact through every winter transition.

Metal roofing achieves UL 2218 Class 4 impact rating—the highest available—and the warranty even covers perforation from hailstones up to 1.5 inches. While Sharon's hail risk is lower than western states, the aluminum's hardness (H24 temper) resists denting far better than asphalt or composite shingles, which dent easily and leak after impact. Many insurers recognize this durability and offer premium discounts for metal roofs; contact your agent with the UL 2218 Class 4 rating to request a quote reduction. Over the 50+ year lifespan, avoiding a single major hail claim (deductible + rate increases) often pays for the material upgrade, and you gain peace of mind knowing the roof isn't counting down to failure after the next storm.

Yes—Interlock's aluminum panels are non-combustible and Class A fire-rated (available upon request), meeting the highest fire classification in the International Building Code (ICC-ES ESR-1790, reissued 2025). Aluminum cannot catch fire or contribute fuel to flames, unlike asphalt (which melts and burns) or wood shake. Some insurers offer small premium discounts for Class A roofing, and local fire codes sometimes favor metal for that reason. In Wisconsin's dry spring and fall seasons (about 3,084 sunshine hours yearly create low-humidity stress), wind-driven embers from neighboring properties become a genuine risk; a non-combustible roof eliminates that liability. If you're near any wooded area or a fire-prone county zone, metal roofing may be a code or insurer requirement—worth a quick conversation with your agent.

Aluminum requires almost no maintenance—no algae treatments, no missing-shingle repairs, no annual inspections hunting for rot. Asphalt shingles need moss removal every 2–3 years in Wisconsin's moist climate; wood shakes split and require regular sealing. Metal panels don't absorb water, so mold and algae have nowhere to grow. Twice yearly, rinse debris from valleys using a garden hose—that's it. The Alunar coating is CALGreen-verified for reduced maintenance, so you're not pressure-washing, resealing, or replacing individual components. Sharon's 838 mm annual rainfall and 84 cm snow mean gutters do clog; but metal roofing itself stays damage-free and inspection-ready. Over 50 years, this saves thousands in contractor visits and materials, letting you spend weekends elsewhere instead of on roof maintenance.

Asphalt costs less upfront but requires replacement every 15–25 years in Wisconsin's climate (freeze-thaw and UV stress shorten lifespan fast), so two or three replacement cycles happen before aluminum needs its first one. Math over 50 years: asphalt at $8,000 × 3 cycles = $24,000 plus tear-off, labor, and disposal; aluminum at $12,000–15,000 once, with minimal maintenance. Add insurance discounts (Class 4 hail, Class A fire), zero leak callbacks, no emergency repairs during winter, and the transferable 50-year warranty boosting resale value—aluminum is cheaper per year of protection. The non-prorated Guardian Warranty also means zero risk of a $3,000 repair in year 30 with an asphalt roof. First-time cost hurts, but the roof you buy once saves money and headaches through your ownership and the next owner's.

Yes. Sharon averages about 84 cm of snow, 838 mm of rain, roughly 83 freeze–thaw days a year, with peak wind gusts near 100 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.