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

Aluminum sheds snow and ice far better than asphalt because its smooth, hard surface won't trap moisture or degrade under the region's roughly 79 freeze-thaw days per year. The lightweight design—Interlock's Slate installs at just 0.41 lb/sq ft—means no structural reinforcement is needed, even though Sherman averages about 141 cm of snow annually. Unlike wood or slate, aluminum won't split or crack as water freezes in surface cracks; the material's oxide layer self-heals, so freeze-thaw cycling causes no material breakdown. Snow guards can be added if you want to manage runoff on steeper slopes.

Interlock uses roofing-grade 3105-H24 and 3003-H24 aluminum alloy, which contains no iron—the element that rusts. Instead, aluminum forms a protective oxide layer that self-heals when scratched, meaning moisture from Sherman's roughly 715 mm of annual rainfall won't trigger corrosion. The Alunar® 70% PVDF fluorocarbon finish is applied to both sides of every panel and warranted 30 years against chalking and fading, adding an extra shield. Steel roofs require ongoing maintenance to prevent rust; aluminum simply doesn't have that vulnerability, making it ideal for Wisconsin's wet climate.

The answer depends on your timeline and total cost. Asphalt roofs last 15–20 years and require replacement, creating repeated tear-off and landfill costs; Interlock's lifetime limited warranty for the original owner means you're buying your last roof. The Guardian Warranty is also one-time transferable, giving the next owner 50 years of coverage from completion. Over 40–50 years, metal's durability and zero maintenance typically costs less per year than multiple asphalt replacements. Your insurance may also offer hail discounts for UL 2218 Class 4 impact protection. Ask a local installer for a full lifecycle comparison.

Many insurers do offer discounts for UL 2218 Class 4 impact-rated roofs, which is the highest hail classification available. Interlock metal roofing carries that Class 4 rating and is even warranted against perforation from hailstones up to 1.5 inches. Given Sherman's typical daily-maximum wind gusts of 19 km/h and occasional stronger storms, Class 4 impact resistance provides peace of mind that asphalt and wood shingles cannot match. Contact your insurance agent with the UL 2218 Class 4 specification—some carriers will reduce your premium or deductible, effectively lowering your net installed cost.

The Guardian Warranty is a lifetime limited, non-prorated material warranty for the original homeowner, covering rusting, rotting, splitting, cracking, curling, and loss of impact resistance—the major failure modes for other roof types. It's transferable once, meaning a second owner receives 50 years of warranty protection from completion. Non-prorated means you're covered the same day 1 as day 30, with no sliding scale. Combined with Interlock's 30-year coating warranty (ASTM-measured), this structure means you're protected against the material degradation that forces homeowners to reroof every 15–20 years. It's the only roof warranty that transfers, adding genuine resale value.

No structural reinforcement is needed. Interlock's profiles are extraordinarily light—the Slate installs at 0.41 lb/sq ft, and the Mediterranean Tile (which looks like traditional clay or concrete) weighs only about 0.59 lb/sq ft, roughly 96% lighter than actual tile or concrete. Most homes' framing, built to support asphalt shingles plus snow load (Sherman averages 141 cm annually), easily handles this aluminum weight. Interlock can often install directly over your existing roof, eliminating tear-off labor and waste. The ICC-ES evaluation report ESR-1790 confirms code compliance for direct installation. Check with your local installer about your specific roof structure.

Yes. Interlock aluminum roofing is non-combustible and available with Class A fire classification, the highest fire rating. Aluminum cannot ignite or spread flame, making it safer than asphalt or wood shingles in wildfire-prone areas or for homes near forests. The ICC-ES evaluation report ESR-1790 confirms code compliance for fire safety under IBC/IRC standards. Some insurers offer modest premium reductions for Class A-rated roofs. While Sherman's climate doesn't feature the extreme wildfire risk of western states, Class A non-combustibility is a genuine safety advantage and a selling point if you ever transfer the home to a second owner.

Virtually none compared to asphalt or wood. Metal won't curl, crack, or split under Sherman's roughly 79 annual freeze-thaw cycles, and aluminum cannot rot or harbor moss the way asphalt and wood do. The Alunar® 70% PVDF coating is warranted 30 years against chalking and fading, so color stays true through about 2,893 annual sunshine hours. Twice yearly, rinse debris and leaves from gutters; that's it. No sealant reapplication, no shingle replacement, no wood treatment. The ICC-ES evaluation also confirms CALGreen compliance for reduced-maintenance roofing. This simplicity is part of why Interlock's lifetime warranty is non-prorated—the roof just keeps protecting your home.

Interlock can often install directly over asphalt shingles or other existing roofs, skipping expensive and wasteful tear-off. Installation timing depends on roof size and weather; most residential jobs complete within a few days. Direct installation over existing roof saves labor, keeps costs lower, and reduces landfill burden. The aluminum's light weight (Slate at 0.41 lb/sq ft) means no structural reinforcement or preparation beyond ensuring the deck is sound. Your local Interlock installer, serving the Sherman area since 2001, can assess your roof in a site visit and provide a timeline. The four-way interlocking panel system ensures weather-tight seals without relying on sealant that degrades over time.

Yes, for the right buyer. Curb appeal matters, and Interlock's five profiles—Slate, Cedar Shingle, Shake, Standing Seam, and Mediterranean Tile—replicate high-end materials without the maintenance headaches. The transferable 50-year Guardian Warranty is a genuine selling point; a buyer inherits decades of protection and zero-maintenance coverage. Most buyers researching roofs learn that metal lasts longer, costs less to own over time, and qualifies for insurance discounts (UL 2218 Class 4). The energy-efficient colors with 0.84 emissivity and up to 0.55 solar reflectance also appeal to energy-conscious buyers. Not every buyer values it, but those seeking durability and low maintenance view it as a premium feature worth paying for.