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

Interlock metal roofing sheds snow and ice efficiently because the four-way interlocked aluminum panels create a smooth, slippery surface that naturally slides debris off—critical in a region averaging about 82 cm of snow per year. The panels are warranted to resist wind gusts up to 120 mph, so the heavy snow loads from our freeze-thaw cycling (roughly 80 days annually) won't compromise the structure. Snow guards can be added if you want to control slide-off, and the aluminum alloy remains flexible through repeated freezing and thawing without the cracking or splitting that affects asphalt or wood shingles.

No—aluminum's metallurgical properties actually thrive through freeze-thaw stress. With Trevor averaging about 80 freeze-thaw days per year, roofing materials experience constant expansion and contraction. Aluminum (ASTM B209, 3105-H24 alloy) has a higher coefficient of elasticity than asphalt or wood and flexes without cracking or curling. The Alunar 70% PVDF fluorocarbon coating, warranted 30 years against fading and chalking, maintains its integrity through these cycles. Where moisture penetrates asphalt seams and freezes, causing delamination, aluminum simply expands and contracts uniformly—another reason this metal has been installed from coastal salt-air homes to Antarctic research stations.

Aluminum cannot rust because it contains no iron—the element that oxidizes into rust. Trevor receives about 835 mm of rain annually, exposing roofing to persistent moisture, yet aluminum develops a transparent oxide layer that self-heals when scratched, sealing the surface from further corrosion. The Alunar 70% PVDF coating (applied to both sides of each panel) adds a second chemical barrier warranted 30 years against degradation. Unlike steel roofing, which requires painted coatings to survive moisture exposure, aluminum's inherent corrosion resistance means the warranty isn't dependent on coating perfection—you're protected by material science, not just paint.

Yes. Interlock metal roofing is warranted to resist wind speeds up to 120 mph when installed to specification, and Trevor's typical gusts reach about 99 km/h (61 mph)—well within that safety margin. The four-way interlocking aluminum panels lock together mechanically, distributing wind loads across the entire roof system rather than relying on fasteners alone to resist uplift. The ICC-ES evaluation report ESR-1790 (reissued 2025) certifies the installation method for building code compliance in high-wind regions. Over 25 years of service in the region, the local installer has documented zero blow-offs from wind events.

Interlock metal roofing achieves UL 2218 Class 4 impact rating—the highest available—and the Guardian Warranty even covers perforation from hailstones up to 1.5 inches. This durability often qualifies homeowners for insurance discounts because hail claims drop dramatically compared to asphalt, which can be punctured or dented by much smaller stones. With roughly 3094 sunshine hours per year in Trevor, the risk of severe hail is real but not extreme; however, a Class 4 rating means your roof survives what asphalt shingles cannot. Many insurers recognize the reduced claims history and offer 5–15% premium reductions—contact your agent with the UL 2218 rating to discuss your specific policy.

Metal roofing costs more upfront—typically 2–3 times asphalt—but over the roof's lifetime it becomes the more economical choice. Asphalt shingles last 15–20 years and require replacement (tear-off costs, landfill fees, new installation). Interlock metal carries a lifetime limited, non-prorated material warranty for the original owner, with a 50-year transferable term for the next owner, meaning you install it once and it likely outlasts your ownership. In Trevor's freeze-thaw climate (about 80 days annually), asphalt degrades faster from repeated expansion and contraction; aluminum flexes without cracking. Over 40–50 years, the single installation plus minimal maintenance costs far less than two or three asphalt replacements plus labor and disposal.

The Guardian Warranty provides a lifetime limited, non-prorated material warranty for the original owner—covering rusting, rotting, splitting, cracking, curling, and loss of impact resistance. This means no deductible increases over time and no exclusions for normal wear. The warranty is transferable once to the next owner, who receives 50 years of coverage from the completion date, adding significant resale value. The Alunar 70% PVDF coating is separately warranted 30 years against chalking and fading (measured per ASTM standards). With Trevor's 835 mm annual rainfall and 80 freeze-thaw days, the non-prorated structure protects you from the exact failure modes that plague asphalt and wood in this climate.

No structural reinforcement is required. Interlock metal panels are extraordinarily light—the Mediterranean Tile profile installs at just 0.59 lb/sq ft, making it approximately 96% lighter than concrete or clay tile and substantially lighter than asphalt shingles. This light weight means the panels can install directly over your existing roof without adding stress to framing or foundation. In contrast, traditional slate or tile requires upgraded structural support (often costing $5,000–$15,000 in labor and materials) to handle the concentrated load. Aluminum's low weight combined with ICC-ES ESR-1790 certification (2025 reissue) allows installation on nearly any existing residential roof deck in Trevor, reducing installation time and labor cost.

Interlock metal roofing requires minimal maintenance—far less than asphalt, wood shake, or clay tile. The non-combustible aluminum alloy (ASTM B209, 3105-H24) doesn't split, rot, or curl like wood does during Trevor's roughly 80 freeze-thaw cycles per year. There's no tar or sealant to reapply; the Alunar 70% PVDF coating (30-year warranty) is chemically bonded and self-healing. Routine care means cleaning gutters (as with any roof) and occasionally rinsing off debris to maintain aesthetics—no power-washing or chemical treatments required. Asphalt shingles need moss removal, sealant reapplication, and regular inspection for storm damage. CALGreen verification confirms Interlock metal as a reduced-maintenance material, translating to decades of minimal upkeep in your Trevor home.

Installation begins with inspecting the existing deck and fastening a thin metal trim and underlayment—typically completed in one day. The lightweight panels (Shake profile ~0.58 lb/sq ft) then install over the existing roof using a fastening pattern specified in ICC-ES ESR-1790, securing to the roof deck through a solid substrate. Because the panels interlock four ways and weigh a fraction of slate or tile, no structural upgrades are necessary on most Trevor homes. The process usually takes 2–4 days for a typical residential roof. Removing your old roof adds cost and landfill fees; installing over existing material saves time and money while reducing waste. The local installer, serving the region since 2001, can assess your specific roof during a free estimate.

Yes. Trevor averages about 82 cm of snow, 835 mm of rain, roughly 80 freeze–thaw days a year, with peak wind gusts near 99 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.