Metal Roofing in Dorchester, New Brunswick — Lifetime Interlock® Aluminum Shingles Installed Locally

Interlock metal roofing sheds snow efficiently because its smooth, interlocking aluminum surface prevents snow from bonding and building up the way it does on asphalt shingles. Dorchester receives about 185 cm of snow annually, but the lightweight design—the Shingle profile weighs just 0.41 lb/sq ft—means no structural reinforcement is needed even in a snow climate. The four-way interlocking system also resists ice dams by allowing water to drain predictably. Optional snow guards can be installed if you want to control snow release for safety.

Aluminum is naturally immune to freeze-thaw damage because it contains no iron and cannot rust or rot—two failure modes that plague asphalt and wood shingles in climates with 83 freeze-thaw days per year like yours. The Alunar 70% PVDF fluorocarbon coating, applied to both sides of every panel and warranted for 30 years against chalking and fading, protects against UV and salt-air exposure during the thaw-freeze cycle. The material's non-porous structure means absorbed water cannot expand and crack the shingle as temperatures fluctuate between seasons.

Aluminum physically cannot rust because rust requires iron, which aluminum does not contain. Instead, aluminum naturally develops a microscopic oxide layer that actually protects it from corrosion. If that layer is scratched—by hail, a branch, or installation—it self-heals automatically. Dorchester's 991 mm of annual rainfall and high humidity make this property invaluable; steel roofing would require costly maintenance or fail entirely. Interlock's roofing-grade 3105-H24 and 3003-H24 aluminum alloy (ASTM B209) is the same material used in coastal salt-air installations and even Antarctic research stations, proving durability in extreme wet environments.

Dorchester experiences typical daily winds around 21 km/h with gusts up to 125 km/h, and Interlock panels are warranted to resist wind speeds up to 120 mph (193 km/h) when installed to specification. The four-way interlocking system mechanically locks each panel to its neighbors in all directions, distributing wind load across the entire roof surface rather than allowing individual shingles to lift. This design exceeds the wind demands of your region, and the system's extreme lightweight—the Shingle profile at 0.41 lb/sq ft—reduces the overall force wind can exert on your structure.

No structural reinforcement is required. Interlock's Mediterranean Tile profile weighs about 0.59 lb/sq ft and is approximately 96% lighter than genuine concrete or clay tile, so it exerts minimal load on your existing framing. This makes it one of the few tile-look roofing options that installs directly over most existing roofs without engineering modifications—a major cost and timeline advantage. The light weight also means lower shipping costs and faster installation, reducing labor expenses that would otherwise offset the aesthetic appeal of a tile appearance.

Metal roofing costs more initially but eliminates the asphalt tear-off-and-replace cycle that occurs every 15–25 years. Interlock carries a lifetime limited, non-prorated material warranty for the original owner, then transfers to the next owner for 50 years—meaning you buy your last roof. Over a 50-year horizon, one metal roof costs less than two or three asphalt replacements, before factoring in labor, debris disposal, and the disruption of reroofing. Maritime Metal Roofing Ltd. is currently offering interest-free payments for 3 months and savings of at least $2,499, making the decision more affordable upfront.

Interlock achieves UL 2218 Class 4 impact rating—the highest available—and the Guardian Warranty even covers perforation from hailstones up to 1.5 inches. This non-combustible, impact-resistant design may qualify you for insurance discounts with some providers, particularly for impact and fire coverage. You should contact your insurer with the ICC-ES evaluation report (ESR-1790) and UL 2218 certification details to explore discounts. The actual savings depend on your policy and insurer, but the durability itself—resisting damage that would destroy asphalt shingles—protects your home and investment against the hail risk inherent in any climate.

Interlock aluminum roofing requires far less maintenance than asphalt, wood, or tile. There is no moss growth (aluminum is naturally inhospitable to organic growth), no tar-bleeding, no wood splitting or rot, and no cracked tiles to replace individually. Annual inspections of fasteners and flashing are prudent, but the Alunar 70% PVDF coating is rated 30 years against chalking and fading (ASTM D4214 / D2244), so the roof's appearance remains stable. In Dorchester's climate—with 83 freeze-thaw days and 185 cm of snow—eliminating the vulnerability of asphalt to thermal stress and snow-related damage translates to dramatically fewer repairs over the roof's life.

Aluminum is approximately 95% recyclable, and Interlock roofing eliminates the traditional asphalt tear-off-to-landfill cycle. When an asphalt roof reaches end of life, tons of material enter the waste stream; aluminum is valuable enough to be reclaimed and remelted infinitely without degradation. Over a 50-year lifespan in Dorchester—where 2,813 sunshine hours per year and high rainfall accelerate asphalt degradation—you would otherwise send three asphalt roofs to the landfill. The aluminum alternative is CALGreen-verified for reduced maintenance, meaning fewer trips for repairs and lower embodied carbon from replacement manufacturing and transportation.

Maritime Metal Roofing Ltd. is your local authorized Interlock installer, serving the Greater Moncton region and Dorchester since 2007. They have on-site experience with the full range of Interlock profiles—Slate, Cedar Shingle, Shake, Mediterranean Tile, and Standing Seam—and are familiar with Dorchester's climate demands: 991 mm annual rainfall, 185 cm of snow, and wind gusts up to 125 km/h. They can guide you through profile selection, assess whether your existing roof structure is suitable for an overlay installation, and ensure your roof is installed to specification for the full 120 mph wind warranty and ICC-ES ESR-1790 compliance.

Yes. Dorchester averages about 185 cm of snow, 991 mm of rain, roughly 83 freeze–thaw days a year, with peak wind gusts near 125 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.