Metal Roofing in St. Joseph’s, Wisconsin — Lifetime Interlock® Aluminum Shingles Installed Locally

Yes — aluminum expands and contracts slightly, but the material won't crack, split, or become brittle the way asphalt, wood, or clay tile do. St. Joseph's experiences about 79 freeze-thaw days per year, the exact stress that degrades traditional materials. Aluminum's oxide layer is chemically inert; freezing water doesn't attack it the way it does slate or shake. The four-way interlocking panels move as one system, so thermal cycling actually works in your favor — it keeps the panels seated and tight.

The lightweight design is a major advantage here. St. Joseph's averages about 88 cm of snow per year, but because Interlock panels weigh just 0.41 to 0.59 lb/sq ft — roughly 96% lighter than concrete or clay tile — snow load is never a structural concern and no roof reinforcement is needed. The smooth, hard surface sheds snow and ice efficiently, which also prevents ice dams from forming along the eaves. Custom snow guards can be added if you want snow to stay put for insulation or aesthetics.

Interlock's four-way interlocking system keeps panels locked together across the entire roof. The warranty covers wind speeds up to 120 mph when installed to specification. St. Joseph's typical gusts reach about 96 km/h (60 mph), well within this margin. The tight mechanical bond means no fasteners pull free and no individual panels lift — the whole roof acts as a single, integrated skin. UL 2218 Class 4 hail rating also validates the panel's structural integrity under severe weather impacts.

Interlock achieves UL 2218 Class 4, the highest impact rating available — tested to withstand steel balls dropped from 20 feet. The warranty even covers perforation from hailstones up to 1.5 inches. Many insurers recognize this rating and may offer premium discounts on metal roofs, though you should check with your agent. For a Milwaukee County property, Class 4 impact resistance pays dividends beyond hail; it protects against debris thrown by the 96 km/h gusts St. Joseph's sees, reducing long-term damage claims.

Aluminum cannot rust because it contains no iron — iron oxide (rust) is what destroys steel roofs. Instead, aluminum develops a thin, invisible oxide layer that actually protects the metal underneath. If that layer is scratched, it self-heals within hours when exposed to air. Interlock uses 3105-H24 roofing-grade aluminum alloy (ASTM B209) with a 30-year Alunar® 70% PVDF fluorocarbon coating applied to both sides — extra protection in wet climates like St. Joseph's, which receives about 822 mm of rainfall annually.

Metal is a one-time roof purchase; asphalt requires replacement every 15–20 years. St. Joseph's 822 mm of rain and 88 cm of snow accelerate asphalt degradation through UV exposure and freeze-thaw cycling. Over 50 years, you'll buy asphalt three times but install Interlock once. The transferable Guardian Warranty — lifetime for you, 50 years for the next owner — protects your investment and adds resale appeal. No tear-off and landfill costs, no labor premiums every couple of decades: the math favors metal when you plan to own long or sell to a buyer who will.

Yes — Interlock's extraordinary light weight (~0.41 lb/sq ft for the Shingle profile) means it installs over most existing asphalt roofs without structural reinforcement. Our crew adds nailers or a minimum deck as needed, but there's no expensive structural upgrade. The installation process takes days, not weeks, and you avoid the cost and mess of tearing off old shingles and hauling them to the landfill. This also means less disruption to your home. Your local Interlock installer, serving the region since 2001, assesses your deck and advises whether an overlay or full deck replacement makes the best sense for your roof's condition.

Very little compared to asphalt, wood, or tile. Interlock panels don't split, curl, or crack, so no repairs from freeze-thaw or UV damage. CALGreen-verified for reduced maintenance, the roof simply sheds debris. Annual gutter cleaning and occasional professional inspection (every 5–10 years) are enough. Asphalt requires patching, moss/algae removal, and tab replacement; slate and shake need constant attention; clay tile cracks and requires resets. St. Joseph's 3,128 annual sunshine hours expose asphalt to UV degradation that never touches aluminum — no coating breakdown, no chalking over the 30-year warranty period.

energy-efficient Interlock colors reflect solar heat rather than absorb it. Cool Roof Rating Council ratings show reflectance up to 0.55 and thermal emissivity of 0.84 — asphalt absorbs far more. In winter, St. Joseph's mean temperature is 9.4°C and you're heating, not cooling; however, reflective coatings still reduce summer heat gain and afternoon AC load during warm months. The real energy win is longevity: a 50-year roof doesn't require replacement energy costs, tear-off labor, or new manufacturing impacts. Your choice of color (Aged Copper Penny, for example) lets you balance aesthetics with reflectance.

About 95% of Interlock aluminum is recyclable at end of life, versus the asphalt tear-off cycle that sends old shingles to landfills. Every roof replacement of asphalt means tons of waste; Interlock breaks that cycle. Manufactured in Delta, BC since 1998, the panels ship lighter than tile or slate, reducing transportation carbon. After 50 years or longer, your metal roof becomes raw material for aircraft, cars, or the next generation of roofing — not landfill. St. Joseph's residents who care about waste reduction and material stewardship choose aluminum for both durability and responsibility.

Yes. St. Joseph’s averages about 88 cm of snow, 822 mm of rain, roughly 79 freeze–thaw days a year, with peak wind gusts near 96 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.