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

Yes—aluminum actually improves in freeze-thaw conditions because it has no moisture absorption and cannot rot or split. Westmorland sees about 84 freeze-thaw days per year, which destroys wood shakes and cracks asphalt, but aluminum's oxide layer self-heals when scratched, and the four-way interlocking panels allow for thermal expansion without panel separation. The Alunar 70% PVDF coating is warranted 30 years against degradation, so seasonal stress doesn't compromise the finish.

Metal roofing sheds snow and ice far more effectively than asphalt because its smooth, hard surface provides no adhesion—ice slides off rather than accumulating. Westmorland averages about 89 cm of snow yearly; that weight sits on asphalt and wood, but aluminum's negligible density (Slate profile at 0.41 lb/sq ft) means no structural reinforcement is needed, and the interlocking seams prevent water infiltration if ice does back up temporarily. Proper installation with snow guards keeps it where you want it.

Aluminum cannot rust because it contains no iron—the element that oxidizes. Instead, aluminum forms an invisible oxide layer that actually protects the metal underneath; when scratched, this layer self-heals. Westmorland's 781 mm annual rainfall and occasional salt-laden air from weather systems won't corrode aluminum the way they corrode steel roofing. Interlock panels are manufactured in coastal British Columbia and installed in salt-air environments globally, proving the alloy's durability under corrosive conditions.

The four-way interlocking panels are warranted to resist wind speeds up to 120 mph when installed to specification. Westmorland's typical wind gusts reach about 104 km/h (65 mph), well within the design envelope, and the mechanical lock of each panel—not fasteners alone—distributes wind load across the entire roof system. The Guardian Warranty covers wind-driven weather damage, so you're protected even in the rare severe wind event that exceeds normal seasonal conditions.

Interlock panels carry the UL 2218 Class 4 impact rating—the highest available—and the warranty even covers perforation from hailstones up to 1.5 inches. Many insurers offer premium discounts for impact-rated roofing because the damage rate is demonstrably lower than asphalt. Contact your agent with the UL rating to discuss your specific policy; non-combustible Class A metal roofing may also qualify for additional credits in some cases.

Yes. The Mediterranean Tile profile installs at about 0.59 lb/sq ft—roughly 96% lighter than concrete or clay tile—so no structural reinforcement is necessary. Most existing roof decks can handle the added load without modification. Westmorland homes built to ICC-ES ESR-1790 code standards (reissued 2025) are already rated for typical asphalt loads, and metal tile weighs a fraction of that, making retrofit installation straightforward and cost-effective compared to traditional tile or slate.

Metal roofing costs more initially but is typically the last roof you install. The Guardian Warranty is a non-prorated lifetime limited material warranty for the original owner—covering rusting, rotting, splitting, cracking, curling, and impact loss—plus a 50-year transferable term for the next owner. Asphalt requires replacement every 15–20 years and ends in the landfill; aluminum is ~95% recyclable. Over 40+ years, the math favors metal: fewer replacements, no maintenance, no tear-offs.

energy-efficient Interlock colors achieve initial solar reflectance up to 0.55 and thermal emissivity of 0.84, meaning they bounce heat away rather than absorbing it like asphalt does. Westmorland receives about 3089 sunshine hours annually; on warm days, reflective metal roofing measurably lowers attic temperature and reduces air-conditioning load. The Cool Roof Rating Council certification confirms the thermal performance, which translates to smaller utility bills and less strain on your HVAC system over time.

Virtually none beyond occasional gutter cleaning. Unlike wood shakes, which split and rot, or asphalt, which chalks and curls, aluminum won't degrade or require sealing, staining, or repair. The Alunar 70% PVDF finish is warranted 30 years against fading and chalking, so color holds. Westmorland's 89 cm annual snow and 781 mm rain won't compromise the roof—leaves and debris wash off the smooth panels naturally. CALGreen verification confirms reduced-maintenance performance, meaning lower ownership costs decade after decade.

Interlock Metal Roofing has served Dane County and the region since 2001, bringing over two decades of local experience to every installation. The team understands Westmorland's climate—freeze-thaw cycles, 89 cm snow loads, and wind gusts to 104 km/h—and installs to the ICC-ES ESR-1790 specification required for warranty coverage. Local service means faster response times, familiarity with your roof's conditions, and accountability in your community.

Yes. Westmorland averages about 89 cm of snow, 781 mm of rain, roughly 84 freeze–thaw days a year, with peak wind gusts near 104 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.