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

Metal roofs shed snow and ice more effectively than asphalt because the smooth, hard surface and thermal properties prevent ice damming—especially important in a region that averages about 88 cm of snow annually with roughly 81 freeze-thaw cycles per year. The four-way interlocking aluminum panels are tested to IBC/IRC code standards (ESR-1790, reissued 2025) for your climate zone. Snow guards can be installed if you prefer controlled shedding. The lightweight design (Slate profile at just 0.41 lb/sq ft) means no structural concerns even under heavy snow load, whereas asphalt or real tile would require reinforcement.

Aluminum actually thrives through freeze-thaw cycles because it contains no iron and cannot rust or rot—the oxide layer that naturally forms on aluminum self-heals when scratched, so repeated freezing and thawing won't compromise the material. With about 81 freeze-thaw days per year in Ottawa, this durability is a real advantage. The Alunar 70% PVDF fluorocarbon coating, warranted 30 years against chalking and fading, further protects the surface. Traditional asphalt, wood, and concrete tile all degrade under these conditions; aluminum only gets tougher.

No—aluminum cannot rust because it contains no iron, which is the element that oxidizes and corrodes. Instead, aluminum develops a thin, transparent oxide layer that actually protects the underlying metal and self-heals when scratched. This is why Interlock aluminum roofing has been installed successfully from coastal salt-air homes to an Antarctic research station since 1998. The roofing-grade 3105-H24 and 3003-H24 aluminum alloys meet ASTM B209 standards. Steel roofs, by contrast, require protective coatings that eventually fail; aluminum's protection is permanent and inherent.

No—Interlock's four-way interlocking aluminum panels are warranted to resist wind speeds up to 120 mph (193 km/h) when installed to specification. Typical daily-max winds in Ottawa average around 20 km/h with gusts reaching 100 km/h, well within that rating. The interlocking design transfers wind forces across the entire roof rather than stressing individual fasteners. Combined with proper installation over a solid deck and underlayment, this system provides the wind security you need without the vulnerabilities of asphalt shingles, which can lift and tear in sustained gusts.

No structural reinforcement is needed. Interlock's Mediterranean Tile profile, for example, weighs only about 0.59 lb/sq ft—roughly 96% lighter than concrete or clay tile—while the Slate comes in at 0.41 lb/sq ft. This extraordinary lightness means the system installs over most existing roofs without modification. A concrete tile roof would require substantial structural upgrades; an aluminum metal roof works on homes built for asphalt. This cost savings, combined with the durability advantage in Ottawa's climate, makes upgrading far more practical.

Yes—Interlock aluminum roofing carries a 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 impact resistance often qualifies homeowners for insurance discounts because hail damage claims drop dramatically. Many insurers offer premium reductions on metal roofs with this certification. Combined with the 30-year coating warranty and lifetime limited material warranty, you're protected against impact damage in ways asphalt roofing simply cannot match.

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. It's one-time transferable, meaning the next owner receives 50 years of coverage from completion—a genuine advantage when selling. The 30-year coating warranty (ASTM D4214/D2244 measured) separately protects color and gloss. Most metal roofs installed properly last 40+ years; this combination of coverage and transferability means you're buying your last roof, not just a replacement that will eventually need replacing again.

Yes—Interlock's energy-efficient colors reflect solar heat that asphalt absorbs and re-radiates into your home. Aged Copper Penny and other rated finishes deliver thermal emissivity of 0.84 and solar reflectance up to 0.55, meaning they bounce heat away rather than trap it. In a region with about 3,074 sunshine hours per year, this reflection reduces cooling load measurably. The Cool Roof Rating Council rating confirms this performance. Combined with the roof's excellent insulation properties when installed over solid decking and underlayment, you'll see tangible reductions in summer energy bills compared to dark asphalt or real tile.

Interlock Metal Roofing has been serving the Waukesha County region, including Ottawa, since 2001. As the local authorized installer, they understand Wisconsin's snow, wind, and freeze-thaw climate firsthand and have completed hundreds of installations on homes just like yours. They handle everything from site assessment and code compliance (ESR-1790, IBC/IRC) to custom flashing and snow-guard installation. Working with an established, local team means shorter response times, warranty support from people who know your roof, and the confidence that your installation meets the highest standards for durability in this specific climate.

Yes—Interlock aluminum roofing is approximately 95% recyclable at end of life, ending the cycle of tear-offs and landfill waste that plagues asphalt roofing. When you replace an asphalt roof, millions of tons of shingles go to landfills annually; aluminum simply returns to the recycling stream. The lightweight design also means less fuel burned during transportation to your home in Ottawa. Because an aluminum roof lasts 40+ years versus asphalt's 15–20, you also eliminate the environmental cost of multiple replacements over a home's lifetime. CALGreen verification confirms reduced maintenance impact as well—fewer chemicals, no coating reapplications.