Metal Roofing in St. Marys, Ontario — Lifetime Interlock® Aluminum Shingles Installed Locally

Yes—aluminum is actually ideal for freeze-thaw environments. With about 84 freeze-thaw days per year in your area and roughly 143 cm of snow, the material's real advantage is that it expands and contracts uniformly without cracking, splitting, or curling like asphalt or wood shakes do. The roofing-grade 3105-H24 aluminum alloy (ASTM B209) has no moisture absorption, so ice melt won't seep into the panels or cause delamination. The oxide layer that prevents rust is also unaffected by repeated temperature swings—unlike steel, which can fracture at those stress points.

Metal roofing sheds snow more effectively than asphalt because of its smooth, interlocking panel design and lower surface friction—snow slides off rather than accumulating into ice dams. With St. Marys receiving about 143 cm of snow yearly, this matters. The four-way interlocking system distributes any remaining load evenly, and because the panels weigh only ~0.41 lb/sq ft for the Shingle profile, there's no risk of overloading your structure the way traditional slate or tile would. You can add snow guards if you want controlled release in certain areas without worrying about the roof's weight capacity.

Absolutely. The four-way interlocking aluminum panels are warranted to resist wind speeds up to 120 mph (193 km/h) when installed to spec. St. Marys experiences typical daily-max winds around 21 km/h with gusts reaching about 117 km/h—well within the roof's rated capacity. The mechanical interlock between panels means wind pressure is distributed across the entire system rather than testing individual fasteners. You're also covered against the occasional extreme gust; the warranty explicitly covers wind-related damage as long as installation follows Interlock's specification.

No structural reinforcement is necessary. The Interlock® Mediterranean Tile profile is about 96% lighter than concrete or clay tile—weighing roughly 0.59 lb/sq ft—so most existing roofs can support it without any upgrades. In fact, you can often install directly over your current asphalt shingles, which saves labor and keeps waste out of the landfill. The lighter load also means less long-term stress on your home's framing, especially important in regions like St. Marys where you're dealing with 143 cm of snow annually plus about 84 freeze-thaw cycles a year—every pound of reduction matters over decades.

Metal roofing actually performs better in hail than most roofing materials. Interlock panels carry a UL 2218 Class 4 impact rating—the highest available—and the warranty even covers perforation from hailstones up to 1.5 inches. Asphalt shingles, wood, and traditional tile all crack or shatter far more easily. Because aluminum has high tensile strength and the panels interlock mechanically, impact energy is absorbed and distributed across the system. Many homeowners report that their insurance companies offer discounts for Class 4-rated metal roofs, which can offset some of the upfront cost over time.

Over the roof's life, metal roofing is the last roof you'll buy—and that's where the value becomes clear. Asphalt typically lasts 15–20 years and requires tear-off and landfill disposal; a metal roof lasts generations with a lifetime limited, non-prorated material warranty for the original owner and a 50-year transferable coverage for the next owner. Right now, Interlock is offering interest-free payments for 3 months and at least $2,499 in savings on installation. When you factor in zero maintenance, no seasonal repairs, and the fact you'll never replace it, the cost-per-year drops dramatically—especially in a climate like St. Marys with 143 cm of snow and 84 freeze-thaw days that accelerate asphalt degradation.

Yes—Interlock offers five profiles: Slate, Cedar Shingle, Shake, Standing Seam, and Mediterranean Tile. Each one is manufactured from the same roofing-grade aluminum alloy and finished with Alunar® 70% PVDF coating, but the panel geometry creates a distinct visual character. The Slate profile has a flat, refined appearance; Cedar Shingle mimics traditional wood grain; Shake captures rustic texture; Mediterranean Tile replicates barrel-tile curves; and Standing Seam delivers a modern, clean aesthetic. All are painted in multiple color options and all carry the same durability—your choice is purely about the architectural style you prefer for your home.

Virtually none. Unlike asphalt shingles that curl and crack, wood shakes that rot, or tile that needs regrouting, aluminum panels don't split, don't absorb moisture, and don't degrade from UV exposure (the Alunar® coating carries a 30-year warranty against chalking and fading). A simple rinse from gutters or seasonal debris removal is all that's needed. In St. Marys, with about 2,874 annual sunshine hours and 143 cm of snow, you won't face the seasonal deterioration that traditional materials endure. The CALGreen-verified design also means reduced maintenance compared to competitors—no moss treatment, no membrane sealing, no fastener replacement.

Yes—metal roofing is approximately 95% recyclable, and aluminum can be melted and reformed indefinitely without losing its properties. When your roof eventually reaches the end of its life (generations from now), the material returns to the recycling stream rather than a landfill. Asphalt, by contrast, requires tear-off disposal every 15–20 years, sending tons of shingles to landfills that won't break down for hundreds of years. Interlock has manufactured in Delta, BC since 1998, and its aluminum comes from responsible supply chains. The energy-efficient color options also reduce cooling demand—reflective coatings with thermal emissivity up to 0.84 mean your roof absorbs less heat, lowering air-conditioning costs over the roof's lifetime.

Interlock Metal Roofing (Ontario) Ltd. has served your region since 1998 and is the authorized installer for Interlock systems. They understand Central-West Ontario's climate—the 143 cm of annual snow, 854 mm of rain, and typical gusts to 117 km/h—and know how to install panels to handle it. Your local team is familiar with St. Marys' residential construction standards and municipal code requirements; all installations comply with ICC-ES evaluation report ESR-1790 (IBC/IRC, reissued 2025). They handle everything from design consultation through warranty registration, and because the product is manufactured in British Columbia and installed locally, you get both supply reliability and responsive service if you ever have questions.

Yes. St. Marys averages about 143 cm of snow, 854 mm of rain, roughly 84 freeze–thaw days a year, with peak wind gusts near 117 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.