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

Interlock panels shed snow and ice effectively because aluminum's smooth surface and four-way interlocking design prevent water pooling. Erin receives about 88 cm of snow annually with roughly 81 freeze-thaw cycles per year — conditions that crack and curl asphalt shingles. The lightweight aluminum (Slate at 0.41 lb/sq ft) requires no structural reinforcement, and the panels' design accommodates optional snow guards if you prefer retained snow for insulation. Unlike asphalt, which expands and contracts with freeze-thaw, aluminum's stable oxide layer won't degrade through repeated cycling.

No. Aluminum fundamentally resists freeze-thaw damage because it contains no iron and cannot rust or absorb moisture into the substrate. Erin's 81 annual freeze-thaw days and 88 cm of snow would cause wood to rot, asphalt to blister, and steel to corrode — but aluminum's self-healing oxide layer remains stable regardless of temperature swings. The Alunar 70% PVDF coating, warranted 30 years against chalking and fading (ASTM D4214), is equally unaffected. Your roof simply endures the cycle without degradation.

Aluminum cannot rust because it contains no iron. When scratched, the aluminum oxide layer self-heals, sealing the exposed surface. This is why Interlock panels are installed from coastal salt-air homes to Antarctica. Erin's 775 mm of annual rain and high-moisture freeze-thaw environment accelerates corrosion in steel roofing — but aluminum thrives here. The Alunar coating applied to BOTH sides of the panel adds 30-year protection. Over your roof's 50+ year lifespan, this eliminates the rust-perforation failures that plagued steel alternatives.

Yes. Interlock's four-way interlocking panels are warranted to resist wind speeds up to 120 mph (193 km/h) when installed to spec. Erin averages daily-max winds around 20 km/h with gusts reaching 100 km/h — well within this warranty. The interlocking mechanism distributes lateral force across multiple panels, so individual fastener failure does not cause uplift. This engineering surpasses traditional asphalt nail-strip designs, which fail progressively as wind pries individual shingles. Your metal roof stays intact through Erin's storm season.

No structural reinforcement is needed. Interlock's Mediterranean Tile profile weighs roughly 0.59 lb/sq ft — about 96% lighter than concrete or clay tile. Even the heavier Shake profile at 0.58 lb/sq ft is negligible compared to asphalt (around 2-3 lb/sq ft). Your home's existing framing easily supports aluminum. This advantage becomes critical in Erin, where 88 cm of snow load is already a structural consideration — metal roofing adds zero incremental load. Installation typically happens over your existing roof, eliminating expensive structural work and tear-off labor.

Possibly. Interlock achieves UL 2218 Class 4 impact rating — the highest available — and the warranty covers perforation from hailstones up to 1.5 inches. Wisconsin insurers recognize Class 4 hail resistance as a significant risk reduction. While discounts vary by carrier and policy, the non-combustible aluminum construction (Class A fire rating available) and proven durability often qualify for reduced premiums or deductibles. Contact your agent with the UL 2218 Class 4 certification and ICC-ES report ESR-1790; documentation accelerates approval.

Interlock requires far less maintenance. Aluminum doesn't rot, split, crack, or curl — eliminating the seasonal inspections, re-nailing, sealing, and replacement costs of asphalt. Wood shingles deteriorate rapidly in Erin's 81 freeze-thaw cycles and 775 mm annual rain, requiring constant repair. Metal roofing needs only occasional gutter cleaning and debris removal — the same as any roof. The CALGreen-verified design confirms reduced maintenance burden. Over 50+ years, this translates to minimal upkeep versus the asphalt tear-off-and-replace cycle every 15-20 years.

Yes, particularly with energy-efficient colors. Interlock's reflective coatings achieve initial solar reflectance up to 0.55 (Aged Copper Penny) and thermal emissivity of 0.84, reflecting heat that asphalt absorbs and re-radiates into your home. Erin receives about 3074 sunshine hours annually — sufficient summer heat that reflectance matters. Cool Roof Rating Council certification confirms the reduction. While Erin's heating load dominates year-round, summer cooling savings are real and measurable, especially in late spring and early fall when AC runs during sunny days.

Significantly. Interlock aluminum is approximately 95% recyclable at end of life, whereas asphalt shingles are tear-off waste destined for landfills. Erin generates substantial roofing debris — multiply typical tear-offs across the region. Over 50+ years, one aluminum roof eliminates the equivalent of multiple asphalt installations from the waste stream. The manufacturing process is energy-intensive but offset by the roof's lifespan and infinite recycling potential. Choosing metal breaks the single-use asphalt cycle that has burdened landfills since the 1950s.

Yes. Interlock Metal Roofing has served Washington County and the surrounding region since 2001, installing all five profiles (Slate, Cedar Shingle, Shake, Standing Seam, and Mediterranean Tile) across residential and commercial projects. The local team understands Erin's snow loads, freeze-thaw demands, and wind exposure — conditions that inform installation technique and material selection. Direct access to your local installer means faster response, warranty support, and the expertise of 23 years' regional experience. Contact them for an on-site assessment and timeline.

Yes. Erin 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.