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

Interlock aluminum panels shed snow and ice far more effectively than asphalt because the smooth, hard surface resists adhesion and the four-way interlocking seams prevent water infiltration during the roughly 100 freeze-thaw days Franklin experiences annually. The metal's thermal conductivity also reduces ice dam formation at the eaves. At about 120 cm of snow per year, your roof needs reliable shedding; aluminum's non-corrosive 3105-H24 alloy won't degrade under repeated freeze-thaw stress like materials containing iron would. Snow guards are available if you need to control shedding near walkways.

Aluminum cannot rust because it contains no iron—the element that oxidizes and corrodes. Instead, aluminum develops a protective oxide layer that self-heals when scratched, making it genuinely corrosion-resistant. In Franklin's 941 mm of annual rainfall, this matters: steel requires ongoing maintenance to prevent rust stains and structural failure, while aluminum's Alunar 70% PVDF fluorocarbon coating (30-year warranty against fading) sits on both panel sides for extra salt-air protection. Over a roof's 30–50 year lifespan, avoiding rust means avoiding leaks, structural repair, and repainting costs that steel demands.

No. Aluminum panels won't crack, warp, or split under freeze-thaw stress because metal expands and contracts uniformly without the moisture absorption that causes wood shingles and asphalt to degrade. Franklin averages roughly 100 freeze-thaw days per year and about 120 cm of snow; these cycles are exactly what aluminum was engineered to handle. The four-way interlocking seams allow controlled expansion without binding, and the Guardian warranty explicitly covers cracking and splitting. Steel would rust at the stress points; concrete or clay tile would eventually spall—aluminum simply cycles indefinitely without damage.

Yes. Interlock panels are warranted to resist wind speeds up to 120 mph, well above Franklin's typical gust speeds of about 110 km/h (68 mph). The four-way interlocking system locks panels on all edges, so wind cannot peel or lift sections. The ICC-ES evaluation report ESR-1790 confirms structural compliance with IBC and IRC wind load requirements. Franklin's mean wind speeds are only 16 km/h, so your roof will experience minimal stress relative to the system's design capacity. Even in worst-case gusts, the interlocking architecture distributes pressure across the entire roof rather than concentrating it at fasteners or seams.

No structural reinforcement is required. Interlock aluminum panels weigh as little as 0.41 lb/sq ft (Shingle profile) and are about 96% lighter than concrete or clay tile, so they actually reduce load on existing framing. Slate weighs far more and demands structural upgrades; aluminum doesn't. You can install Interlock over most existing roofs without modifications, saving thousands in labor and reinforcement. The Guardian warranty covers installation over existing roofing, and the ESR-1790 evaluation confirms compliance without upgraded support. This lightweight advantage is especially valuable in older Franklin homes where adding heavy tile would require expensive structural work.

Interlock panels 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. This superior hail performance often qualifies metal roofs for insurance discounts because claims are rare and damage minimal compared to asphalt. Class 4 rating means the panel resists deformation and impact damage far better than typical roofing materials. Contact your insurance agent with the UL 2218 Class 4 specification; many insurers recognize this and reduce premiums. In Franklin's climate, hail is less frequent than wind or snow, but the Class 4 protection ensures that if it occurs, your roof and wallet stay intact.

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. It's one-time transferable, giving the next owner 50 years of coverage from completion. Most asphalt warranties are 20–30 years and heavily prorated after year five, meaning you pay most repair costs yourself later. The Alunar fluorocarbon coating carries a separate 30-year fade and chalk warranty (ASTM D4214 measured). This means the last roof you install on your Franklin home will outlast you and add transfer value—a genuine difference in cost over the roof's lifespan.

Interlock roofs require minimal maintenance compared to asphalt, wood, or tile. Aluminum won't rot, split, or curl, so you avoid the routine repairs asphalt demands every 5–10 years. The smooth surface sheds debris easily, and the Alunar coating resists algae and moss growth in Franklin's roughly 3017 annual sunshine hours and 941 mm rainfall. No repainting, re-sealing, or replacement of individual shingles is needed. Wood shake roofs require frequent inspection and repair; tile demands regrouting; asphalt shingles need spot replacement and roof coatings every decade. Interlock's sealed interlocking design and non-corrosive aluminum mean you inspect once yearly and that's it—no calls to roofers for maintenance during the roof's 50+ year life.

Yes. energy-efficient Interlock colors have thermal emissivity of 0.84 and solar reflectance up to 0.55 (Aged Copper Penny), meaning they reflect heat that dark asphalt absorbs and re-radiates into your attic. In Franklin's roughly 3017 annual sunshine hours, this reflectance reduces cooling load during summer months. Cool Roof Rating Council certification confirms the measured heat-rejection performance. While Franklin's mean temperature of 8.2°C is cool, summer peaks still drive air conditioning, and reflecting solar gain lowers those peak costs. Metal's conductivity also allows heat to dissipate quickly rather than building up in the roof cavity, so your HVAC system runs less during warm periods.

Over 40–50 years, yes. Asphalt costs less upfront but requires full replacement every 15–25 years, multiple repair cycles costing 30–40% of a new roof each time, and eventual disposal of roofing waste. Interlock's Guardian lifetime warranty and non-prorated coverage mean your next roof installation is your last one. Regional financing is currently available: no payments and no interest until Spring 2027, or 10% off installation. A single asphalt roof replacement in 20 years, plus repairs and tear-off costs, approaches or exceeds metal's initial price. Add Franklin's 941 mm rainfall and 100 freeze-thaw cycles annually—both accelerate asphalt deterioration—and aluminum's durability becomes the true economy. You buy the roof once and transfer ownership value to the next owner.