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

Yes — aluminum actually thrives in freeze-thaw cycles because it has no iron and cannot rust, even when repeatedly exposed to moisture and temperature swings. Highwood experiences roughly 82 freeze-thaw days per year, which breaks down asphalt and causes wood to split and curl, but aluminum's oxide layer self-heals when scratched. The 3105-H24 alloy Interlock uses is rated for this kind of climate stress, and the Alunar 70% PVDF coating stays flexible through seasonal shifts. You're investing in a roof designed to perform through decades of your region's worst winter punishment.

Metal roofing sheds snow and ice far more readily than asphalt because of its smooth, hard surface and the tight four-way interlocking seals that prevent water from pooling underneath. Highwood receives about 73 cm of snow annually, and the metal panel's low thermal mass means less heat loss keeps the underside cooler, reducing the freeze-thaw cycling that creates dangerous ice dams. Snow guards can be added to any Interlock profile if you prefer gradual release for safety. The standing seam and shake profiles are especially popular in snow-heavy regions because their geometry naturally encourages drainage.

Aluminum cannot rust because it contains no iron — the element that oxidizes and creates rust in steel roofing. Instead, aluminum forms a self-healing oxide layer that protects the metal underneath; if the coating is scratched, that layer reforms automatically. Highwood's annual rainfall of about 993 mm and exposure to freeze cycles would devastate steel, but aluminum actually strengthens chemically under moisture stress. Interlock's roofing-grade 3105-H24 aluminum alloy is ASTM B209 certified, and the Alunar 70% PVDF coating (applied to both sides) is warranted 30 years against chalking and fading. You'll never worry about rust stains or structural failure from corrosion.

Highwood's typical gusts reach 97 km/h, well within the capability of Interlock's four-way interlocking panels, which are warranted to resist wind speeds up to 120 mph (193 km/h) when installed to specification. The interlocking design creates a unified panel system — not individual shingles that lift or separate — so wind pressure is distributed across the entire roof rather than concentrated on edges. The lighter weight (the Slate profile installs at about 0.41 lb/sq ft) also means panels flex slightly with gusts instead of fighting them rigidly, reducing stress on fasteners and seams. Your roof moves with the wind rather than resisting it.

Interlock's aluminum panels are rated UL 2218 Class 4, the highest impact classification available, and the warranty even covers perforation from hailstones up to 1.5 inches. Class 4 impact resistance means the panels withstand repeated testing with steel balls dropped from increasingly greater heights without cracking, denting beyond limits, or losing sealing integrity. Many insurance companies recognize this durability and offer lower or stable premiums for metal roofs (check your own policy for potential discounts). Unlike asphalt shingles, which are notoriously vulnerable to hail and often require replacement after a single storm, an Interlock roof keeps you protected and ahead of repair costs.

No — aluminum's lightweight nature means almost no structural upgrades are needed. The Mediterranean Tile profile, which replicates the look of traditional clay or concrete tile, installs at just 0.59 lb/sq ft; that's about 96% lighter than the actual tile it mimics. Since Interlock panels are so light, they can install over most existing roofs without additional support — a major cost saving compared to slate or ceramic tile, which require expensive structural reinforcement. The entire roof system (ICC-ES ESR-1790 certified for IBC/IRC code compliance) transfers minimal additional load to your home's framing, making retrofit and new construction equally straightforward and affordable.

Yes — Interlock's energy-efficient colors reflect significantly more solar heat than asphalt absorbs. The Aged Copper Penny finish, for example, has initial solar reflectance up to 0.55 and thermal emissivity of 0.84, meaning it bounces summer heat away instead of trapping it in your attic. Highwood enjoys about 3,051 sunshine hours per year, so this reflectance matters over months of warm weather. Cool Roof Rating Council certification confirms the energy benefit in real-world conditions. Your cooling system runs less, utility bills drop, and the reduced thermal cycling also extends roof component life — aluminum stays more stable through temperature swings than darker asphalt, which can exceed 80°C in summer sun.

Virtually none — the aluminum panel and Alunar 70% PVDF coating are engineered to shed debris and resist weathering with minimal upkeep. Unlike asphalt shingles, which require regular inspection and replacement of deteriorated sections, or wood shake, which needs periodic treatment and splitting repair, Interlock panels don't curl, crack, or need sealing. Highwood's 993 mm of annual rainfall and 73 cm of snow naturally clean the roof surface. The only routine task is clearing gutters and visible debris — the same maintenance any roof requires. CALGreen verification confirms reduced maintenance burden, and the lifetime limited, non-prorated warranty means you're covered for any material failure, not just the first decade.

The Guardian Warranty is a lifetime limited, non-prorated material warranty for the original owner — covering rust, rot, splitting, cracking, curling, and loss of impact resistance for as long as you own the home. It's also transferable once; the next owner receives 50 years of coverage from project completion. In practice, Interlock panels manufactured since 1998 have been installed from coastal salt-air environments to an Antarctic research station and show no signs of material degradation. Aluminum doesn't age like asphalt (which deteriorates in 15–25 years) or wood (which requires replacement in 30–40 years); combined with the 30-year Alunar coating warranty against chalking and fading, you're looking at a roof that outlives most mortgages and transfers real value to the next owner.

Interlock Metal Roofing has served the Lake County region since 2001, bringing over two decades of installation experience specific to Highwood's climate, building codes, and architectural styles. Local installers understand how to manage the area's typical wind gusts (97 km/h), heavy snow (73 cm annually), and freeze-thaw cycling (82 days per year), and they're familiar with the ICC-ES ESR-1790 certification requirements for your jurisdiction. Direct access to a manufacturer-authorized installer means faster service, warranty support, and advice tailored to your property — no middlemen or delayed parts shipments. Call for a no-obligation inspection and estimate; they can also discuss potential insurance premium reductions for your specific coverage.

Yes. Highwood 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.