Metal Roofing in Westchester, Illinois — Lifetime Interlock® Aluminum Shingles Installed Locally

Yes — Interlock panels are engineered to shed snow and ice safely without accumulation that damages asphalt roofs. Westchester receives about 73 cm of snow annually, and freeze-thaw cycling happens roughly 82 days per year here, which causes asphalt shingles to crack and curl. Aluminum's oxide layer doesn't degrade in those cycles, and the four-way interlocking system creates a smooth surface that prevents ice damming. You can add snow guards if desired, but the material itself won't split or warp when water freezes and thaws repeatedly.

Aluminum cannot rust because it contains no iron — the element that oxidizes and creates rust stains on steel roofs. Instead, aluminum forms a self-healing oxide layer that protects the material underneath. Westchester's 993 mm of annual rainfall and occasional road salt exposure are no threat to roofing-grade 3105-H24 aluminum. The Alunar 70% PVDF fluorocarbon finish, warranted 30 years against corrosion, adds a second line of defense on both sides of each panel.

No structural reinforcement is needed. Interlock's Mediterranean Tile profile, for example, weighs just 0.59 lb/sq ft — about 96% lighter than concrete or clay tile — so it installs safely over most existing roofs, including asphalt shingles. This matters in Westchester because it means no expensive framing upgrades, faster installation, and you can often avoid the cost and mess of a full tear-off. The four-way interlocking system distributes weight evenly across your roof deck.

Interlock panels are warranted to resist wind speeds up to 120 mph when installed to spec — well above Westchester's typical gusts, which average around 19 km/h with occasional peaks near 97 km/h. The four-way interlocking design locks each panel to its neighbors, preventing uplift in storms. This engineering also means your insurance carrier may recognize the wind resistance, potentially lowering premiums. The ICC-ES evaluation report ESR-1790 confirms compliance with wind load standards in the International Building Code.

The Guardian Warranty is a lifetime limited, non-prorated material warranty for you as the original owner — covering rusting, rotting, splitting, cracking, curling, and loss of impact resistance. It's transferable once, so the next owner receives 50 years of coverage from completion. That means you're buying your last roof; no more replacements every 15–20 years like asphalt. Combined with Interlock's track record since 1998, this warranty reflects confidence in durability across decades and thousands of installations.

Interlock achieves UL 2218 Class 4 impact rating — the highest available — and the warranty covers perforation from hailstones up to 1.5 inches. In regions prone to severe hail, insurance companies often offer premium discounts for Class 4 roofs because claims are rare. While Westchester's climate data doesn't flag hail as frequent, the impact resistance still protects against falling branches and debris from the 993 mm of annual rainfall we experience. Check with your insurer — some offer credits for high-impact-rated roofs regardless of local hail frequency.

energy-efficient Interlock colors reflect heat rather than absorbing it like asphalt, with solar reflectance up to 0.55 and thermal emissivity of 0.84. Over Westchester's 3,051 annual sunshine hours, that reflectivity cuts cooling load on warm days. The Cool Roof Rating Council certification confirms the thermal performance. You won't eliminate AC costs entirely, but the reduction compounds year after year. Lighter colors make the biggest difference; darker finishes still reflect more heat than asphalt while offering the aesthetic you want.

Significantly less than asphalt, wood shake, or tile. Aluminum doesn't rot, split, or curl like wood; it doesn't crack or deteriorate like asphalt or clay; and the interlocking design prevents debris from lodging underneath. Westchester's 73 cm of annual snow and 82 freeze-thaw days stress traditional roofing materials, but aluminum's oxide layer handles those cycles without degradation. Occasional gutter cleaning and leaf removal are all you need. The CALGreen verification confirms reduced maintenance requirements compared to conventional roofs.

Yes. Interlock's light weight — the Slate profile installs at just 0.41 lb/sq ft — allows installation over most existing asphalt roofs without tear-off. This saves weeks of disruption, dust, and landfill costs. Your installer (Interlock Metal Roofing, serving the region since 2001) evaluates roof condition first; if the deck is sound, installation proceeds directly. You avoid the labor and debris-removal expenses of a full tear-off. The installation timeline is typically shorter because there's no old roofing to remove before new panels go down.

Aluminum is approximately 95% recyclable at end-of-life, and Interlock roofing ends the asphalt shingle cycle — the tear-off-to-landfill routine that happens every 15–20 years and fills regional waste sites. Over Westchester's 993 mm annual rainfall, asphalt shingles degrade and require replacement; aluminum does not. Choosing a roof that lasts a lifetime (backed by The Guardian Warranty) rather than a few decades cuts your home's roofing waste footprint dramatically. The material itself is made from recycled aluminum in many cases, further closing the loop.

Yes. Westchester averages about 73 cm of snow, 993 mm of rain, roughly 82 freeze–thaw days a year, with peak wind gusts near 97 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.