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

Yes—aluminum's oxide layer actually strengthens in freeze-thaw conditions rather than cracking like asphalt or slate. Sullivan averages about 81 freeze-thaw days annually, where roofing material expands and contracts constantly. Interlock's 3105-H24 aluminum alloy is specifically engineered for this cycling; the metal flexes without brittleness and the Alunar PVDF coating (warranted 30 years) doesn't chalk or peel when exposed to repeated temperature swings. Asphalt shingles, by contrast, become rigid in cold and lose flexibility, leading to cracks that accelerate water damage.

Metal roofs shed snow and ice far more efficiently than asphalt because the smooth, hard surface prevents snow from adhering and building up into dangerous loads. With about 88 cm of snow per year in Sullivan, this matters: a lighter roof (Interlock Slate installs at just 0.41 lb/sq ft) also reduces the structural burden of that accumulated weight. Optional snow guards can be added if you want to manage runoff onto walkways. The interlocking four-way panel design prevents ice dams from exploiting gaps—water follows the profile's channels and drains cleanly.

Absolutely. Sullivan experiences typical wind gusts around 100 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 spec. The interlocking design locks each panel to its neighbors on all four sides, distributing wind load across the entire roof system rather than stressing individual fasteners. This is verified under code compliance ESR-1790 (IBC/IRC). Your roof won't flutter, lift, or leak under the gusts you'll actually encounter in this region.

Interlock achieves UL 2218 Class 4 impact rating—the highest available—meaning it withstands hailstones up to 1.5 inches without losing performance. Many insurers recognize this and offer premium reductions for Class 4-rated roofs because claims are rare. The non-combustible aluminum (Class A fire available) also qualifies for fire-safety discounts in some policies. Check with your agent about your specific policy, but a documented Class 4 rating is a concrete selling point on a homeowner's insurance application, especially in a region where severe weather can bring unexpected hail.

The Guardian lifetime limited warranty covers the original owner for the life of the roof—no pro-rating—and includes rusting, rotting, splitting, cracking, curling, and loss of impact resistance. It's also transferable once; the next owner receives 50 years of coverage from completion. Unlike asphalt shingles (typically 15–25 years), you're not replacing this roof every generation. Paired with the 30-year warranty on the Alunar coating against chalking and fading (ASTM D4214/D2244 tested), you're looking at a roof that performs for decades, not years.

Over the roof's lifespan, metal roofing is the last roof you buy. Asphalt typically costs less upfront but fails in 15–25 years, then you repeat the cycle: tear-off, landfill fees, reinstallation labor. Metal installs once and doesn't degrade for 50+ years. In Sullivan's climate—with about 88 cm of snow, 81 freeze-thaw days, and gusts to 100 km/h annually—asphalt accelerates its decline. Aluminum's lightweight design (Interlock Shake at 0.58 lb/sq ft) often means installation over your existing roof, avoiding tear-off costs entirely. One roof, one labor expense, one learning curve—that's the real value.

No. Interlock's aluminum is extraordinarily light—the Mediterranean Tile profile weighs about 0.59 lb/sq ft, roughly 96% lighter than concrete or clay tile—so most existing roofs can support it without structural work. That lightweight design also means less cumulative strain during Sullivan's 88 cm annual snowfall; the roof itself doesn't add to the load your rafters and trusses must carry. By contrast, slate or clay tile often requires expensive internal bracing. You simply remove old shingles (if desired) or install directly over them, and the interlocking panels distribute their minimal weight evenly across your existing structure. No reinforcement, no hidden costs.

Yes, if you choose an energy-efficient color. Interlock offers reflective profiles with initial solar reflectance up to 0.55 and thermal emissivity of 0.84, rated by the Cool Roof Rating Council. These colors bounce solar heat away rather than absorbing it like dark asphalt. With about 3,074 sunshine hours annually in Sullivan, that reflection adds up over summer months. The aluminum also conducts heat differently than asphalt—it warms and cools faster, reducing the radiant load transferred into your attic and living spaces. Pairing a reflective finish with proper attic ventilation can noticeably lower air conditioning demand.

Yes. Aluminum is approximately 95% recyclable; at the end of its life (50+ years from now), your roof can be melted down and reused, not buried in a landfill. Every time an asphalt roof is replaced in Sullivan, old shingles—soaked in petroleum and fiberglass—end up in the waste stream; multiply that across thousands of homes and the regional impact is significant. Interlock's manufacturing has been running since 1998 in Delta, BC, and the product is CALGreen-verified for reduced maintenance, meaning fewer interventions and waste over its lifespan. Choosing aluminum over the asphalt tear-off-to-landfill cycle closes a loop.

Interlock Metal Roofing itself serves the region and has been installing in Wisconsin since 2001, meaning the company understands local snow loads, freeze-thaw behavior, and wind patterns. Your installer knows how to flash correctly in Sullivan's climate, how to account for about 775 mm annual rainfall in drainage design, and how to meet ICC-ES ESR-1790 (IBC/IRC) code requirements in Jefferson County. You're not working with a roofing crew unfamiliar with metal or learning on your house; you're getting regional expertise, local accountability, and a team that stands behind the installation.

Yes. Sullivan averages about 88 cm of snow, 775 mm of rain, roughly 81 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.