Metal Roofing in Chesterville, Ontario — Lifetime Interlock® Aluminum Shingles Installed Locally

Yes—Interlock's four-way interlocking aluminum panels are engineered to shed snow safely without sagging or pooling water. At just 0.41 lb/sq ft for the Shingle profile (about 96% lighter than concrete tile), they impose zero structural load, so no reinforcement is needed even in your 143 cm annual snowfall. The smooth metal surface and tight panel interlock naturally discourage ice dam formation where snow melts and refreezes in the eaves—a real problem with asphalt in your ~89 annual freeze-thaw cycles. Optional snow guards keep roof runoff from sliding suddenly onto walkways below.

Aluminum thrives in freeze-thaw cycles because it has no porosity to trap water and no wood fiber to swell when wet. Your region experiences about 89 freeze-thaw days annually, plus roughly 928 mm of rain and 143 cm of snow—conditions that would cause asphalt to crack, wood shakes to split, and traditional tile to spall. Aluminum's oxide layer simply self-heals when scratched, and the Alunar® 70% PVDF fluorocarbon coating (warranted 30 years) protects both panel faces. The material was designed for Antarctic research stations and coastal salt-air homes—your climate is routine for it.

Aluminum cannot rust because it contains no iron. Instead, it forms a protective oxide layer that self-heals when scratched—a natural defense that actually strengthens over time. With 928 mm of annual rainfall and freeze-thaw cycling, the Alunar® dual-sided PVDF coating (applied to both the top and underside of every panel) provides an extra 30-year warranty against chalking and fading. Steel roofing, by contrast, requires ongoing maintenance and can rust through if the coating fails. Your climate's moisture won't harm aluminum; the material has been installed continuously since 1998 in far more corrosive salt-air environments.

Interlock panels interlock four ways and are warranted to resist wind speeds up to 120 mph (193 km/h). Your region's typical gusts reach about 93 km/h, so you're well within safe margins even during severe weather. The four-way interlocking system means each panel is locked to its neighbors on all sides—the uplift force that would tear asphalt shingles loose has nowhere to go. The warranty explicitly covers wind events up to 120 mph when installed to specification, and there's no degradation of the interlocking mechanism over the roof's life. Steel roofing can dent under impact; aluminum resists and rebounds.

Interlock achieves UL 2218 Class 4 impact rating—the highest available—and the warranty covers perforation from hailstones up to 1.5 inches. Many insurers recognize this and offer rate reductions; contact your provider with the UL 2218 rating and Guardian Warranty details for a formal quote. Unlike asphalt, which becomes brittle in freeze-thaw cycles and is vulnerable to hail damage, aluminum's non-combustible, impact-resistant surface often qualifies for preferred underwriting. With 143 cm of snow and routine hail risk across Ontario, the Class 4 rating isn't just a spec—it's practical protection that can lower your annual premiums significantly.

The four-way interlock creates a seal so tight that water sheds off before it can pool or seep into panel overlaps—exactly what you need with 928 mm of annual rainfall. Unlike asphalt, which relies on sealant strips that dry out and fail, the interlock mechanism is passive and permanent; there's no adhesive to degrade. Installation over a solid deck with ice-and-water underlayment (standard practice) means water that somehow breaches the primary seal still encounters a secondary barrier. The warranty covers rusting, rotting, and leaks from material or workmanship defects—with no prorated deductible for the original owner, you're protected for life.

Virtually none. Asphalt requires periodic sealant reapplication, wood shakes demand fungicide treatment and regular replacement of cracked or split pieces, and traditional tile needs mortar repair—all expensive recurring costs. Aluminum requires only occasional rinsing to clear debris (leaves, pollen) from valleys, typically twice a year. The CALGreen program has verified Interlock as a reduced-maintenance roofing system. The Alunar® coating doesn't chalk or fade over 30 years (ASTM-rated), so there's no restoration painting. Your 2882 annual sunshine hours and 928 mm rainfall create a self-cleaning cycle; rain washes the roof, sun keeps it dry.

Yes—one of Interlock's biggest advantages. The exceptionally light weight (Shingle profile at 0.41 lb/sq ft, Shake at 0.58) means it installs directly over most existing roofs without tearoff and structural reinforcement. Tearoff costs, disposal fees, and landfill impact disappear. Interlock Metal Roofing (Ontario) Ltd. has installed thousands of roofs over existing shingles since 1998, and the process typically takes days, not weeks. Installation includes ice-and-water underlayment for extra leak protection. You're replacing asphalt with a lifetime-warranted, recyclable material while keeping your home occupied and avoiding the mess and expense of a full tearoff.

Yes, in two major ways. First, approximately 95% of Interlock's aluminum is recyclable at end of life—asphalt shingles are not and end up in landfills by the millions of tons annually. Second, Interlock installs over existing roofs, eliminating the tearoff process that generates tons of waste per house. A typical asphalt roof replacement produces several tons of non-recyclable debris; aluminum roofing produces nearly zero. Over the roof's lifetime (original owner gets non-prorated coverage; transferable warranty gives the next owner 50 years), you avoid multiple tearoff cycles. The material reflects solar heat (energy-efficient, up to 0.55 reflectance) rather than absorbing it like asphalt, reducing cooling demand during your 2882 annual sunshine hours.

The Guardian Warranty is non-prorated for the original owner—meaning you don't pay deductibles or face coverage reductions as the roof ages. It covers rusting, rotting, splitting, cracking, curling, and loss of impact resistance for life. It's transferable once to the next owner, who receives 50 years of coverage from completion date. This is extraordinary in roofing: asphalt warranties typically expire or become prorated within 15 years, while wood and tile warranties often don't cover age-related failure at all. You're buying a roof that either outlives your ownership or transfers real value to your buyer. The Alunar® coating itself carries a separate 30-year warranty against chalking and fading, protecting the finish long after many roofs fail.

Yes. Chesterville averages about 143 cm of snow, 928 mm of rain, roughly 89 freeze–thaw days a year, with peak wind gusts near 93 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.