Metal Roofing in New London, New Hampshire — Lifetime Interlock® Aluminum Shingles Installed Locally

Metal roofs shed snow effectively because aluminum panels are smooth and slippery—snow slides off rather than building up and stressing your structure the way it does on asphalt. With about 120 cm of wet snow per winter here, the light weight of Interlock panels (the Slate profile installs at just 0.41 lb/sq ft) means your framing absorbs minimal load even when snow does temporarily accumulate. The four-way interlocking design also prevents wind-driven snow infiltration during the gusty conditions—New London averages gusts to 116 km/h—keeping ice dams from forming at the eaves.

No—aluminum actually thrives in freeze-thaw climates like New London's, where you experience roughly 93 freeze-thaw days annually. Unlike asphalt shingles, which crack and curl when water infiltrates and expands, aluminum contains no porous material for water to penetrate. The roofing-grade 3105-H24 aluminum alloy (ASTM B209) expands and contracts slightly with temperature swings, but it doesn't degrade. The Alunar 70% PVDF fluorocarbon coating on both sides resists the damaging effects of repeated freezing, and the Guardian Warranty covers cracking and curling for the original owner's lifetime.

Aluminum cannot rust because it contains no iron—the element that corrodes in steel roofing. What aluminum does develop is an oxide layer on its surface, which actually protects the underlying metal. If that layer is scratched (say, by a branch in a storm), it self-heals when exposed to air and moisture. For New London's 847 mm of annual rainfall and winter salt-air exposure, this is critical: your roof will never develop the rust stains or structural deterioration that plague steel products. The Guardian Warranty's lifetime coverage of rusting applies because it simply won't happen.

Metal roofs save on cooling because they reflect solar heat instead of absorbing it the way dark asphalt does. Interlock's energy-efficient colors achieve initial solar reflectance up to 0.55 (like Aged Copper Penny) and thermal emissivity of 0.84, meaning less heat transfers into your attic during the roughly 2,958 annual sunshine hours New London receives. Over the roof's 50+ year lifespan, this reflectivity reduces air-conditioning demand on warmer days. The Cool Roof Rating Council certification backs these measurable performance differences. Combined with the 30-year coating warranty against fade, your savings remain consistent even as the roof ages.

Yes, and you may qualify for premium discounts. Interlock metal roofs carry a UL 2218 Class 4 impact rating—the highest available—and the Guardian Warranty even covers perforation from hailstones up to 1.5 inches. Many insurers view this durability favorably and offer reduced rates or deductibles compared to asphalt-covered homes. Contact your agent with the UL 2218 Class 4 rating and the hail coverage details; carriers often recognize the reduced risk of claims. For New London's climate, where severe hail is less frequent than snow or wind gusts (116 km/h typical), this rating provides peace of mind without inflating your premiums.

Yes—the four-way interlocking aluminum panels and the Guardian Warranty cover wind speeds up to 120 mph (193 km/h) when installed to specification. New London's typical gusts reach 116 km/h, leaving a safety margin. The interlocking design distributes wind load across the entire roof rather than relying on fasteners alone, and the lightweight aluminum (Shake profile at 0.58 lb/sq ft) doesn't create the drag that heavier materials do. Ice and snow add weight temporarily, but the panel geometry sheds both, so your roof stays strong through winter storms and spring nor'easters.

Almost never. Interlock aluminum roofing is extraordinarily light—the Mediterranean Tile profile, which replicates real clay tile, weighs about 0.59 lb/sq ft and is roughly 96% lighter than the concrete or clay tiles it mimics. Most homes can install it directly over existing asphalt without structural reinforcement. This is crucial in New London, where 166 cm of annual snow occasionally adds temporary load; the light metal roof means your framing handles seasonal weight more easily than it would asphalt plus an ice layer. The ICC-ES evaluation report ESR-1790 confirms code compliance for typical residential construction, eliminating engineer visits and retrofit costs.

Metal roofs require dramatically less maintenance. Unlike asphalt shingles, which degrade from UV exposure and need sealing, or cedar shakes, which split and rot in New London's 93 annual freeze-thaw cycles, aluminum roofing doesn't deteriorate. The Alunar 70% PVDF coating (warranted 30 years against chalking and fade per ASTM D4214/D2244) doesn't require repainting or sealing. Your main task is clearing debris from valleys and gutters after fall winds—the same as any roof. The Guardian Warranty covers cracking, curling, rotting, and splitting, none of which happen to aluminum. This low-maintenance profile is verified by CALGreen assessment.

Interlock metal roofing has a track record spanning 27 years of manufacturing and installations from coastal salt-air homes to an Antarctic research station—environments far harsher than New London's 847 mm rain and 166 cm snow annually. The Guardian Warranty provides lifetime limited, non-prorated material coverage for the original owner (covering rusting, rotting, splitting, cracking, curling, and loss of impact resistance) and a transferable 50-year term for the next owner. The 30-year coating warranty protects against fading. Real-world durability routinely exceeds 50 years; this is your last roof, not a temporary fix.

Yes, Interlock can install directly over existing asphalt in most cases, saving tear-off labor and landfill costs. Installation typically takes 2–5 days depending on roof complexity and weather; New London's seasonal wind (gusts to 116 km/h) and snow may slightly extend timelines, but the straightforward four-way interlocking panel design speeds work once conditions permit. Interlock Metal Roofing (New England) Inc. has served the region since 1999 and manages local scheduling around New England weather. Current financing offers no payments and no interest until Spring 2027 or 10% off installation, making the timeline and budget predictable before work begins.

Yes. New London averages about 166 cm of snow, 847 mm of rain, roughly 93 freeze–thaw days a year, with peak wind gusts near 116 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.