Metal Roofing in Allentown, Pennsylvania — Lifetime Interlock® Aluminum Shingles Installed Locally

Interlock's four-way interlocking aluminum panels shed snow and ice efficiently because the smooth, hard surface prevents the adhesion that traps moisture on asphalt. With about 60 cm of snow annually and roughly 80 freeze-thaw cycles per year in this region, the non-porous aluminum eliminates the rot and splitting that wood and asphalt suffer under repeated freezing. Snow guards can be added to match your roof pitch and snow-shedding patterns. The panels' lightweight design (Shingle profile at 0.41 lb/sq ft) means no structural reinforcement is needed even in heavy accumulation.

No—Interlock roofing uses roofing-grade 3105-H24 aluminum alloy, which contains no iron and therefore cannot rust, even in wet conditions. Instead, aluminum forms a thin oxide layer that self-heals when scratched, protecting the core indefinitely. The Alunar 70% PVDF fluorocarbon finish is applied to both sides and warranted for 30 years against chalking and fading (energy-efficiency verified). With Allentown averaging 1137 mm of rain annually, this corrosion immunity is a structural advantage steel roofing simply cannot match.

Freeze-thaw cycling—Allentown experiences about 80 such days per year—degrades asphalt, wood shakes, and concrete tile by forcing water into pores, where it expands and cracks the material. Aluminum does not absorb water and expands minimally with temperature swings, making it inherently resistant to this damage mechanism. The four-way interlocking design prevents water penetration at panel seams. Combined with the self-healing oxide layer, this makes freeze-thaw one of aluminum's structural advantages over traditional roofing materials in temperate climates.

No structural reinforcement is required. Interlock's aluminum panels are extraordinarily light: the Tile profile weighs about 0.59 lb/sq ft, roughly 96% lighter than concrete or clay tile. Most homes can support this weight without modification, and the roof often installs directly over your existing asphalt without tear-off costs. Interlock has been installed since 1998 on homes from coastal salt-air regions to Antarctic research stations, proving the panels' structural suitability across extreme environments. Your local installer can confirm your home's current framing capacity.

Interlock panels are warranted to resist wind speeds up to 120 mph (193 km/h) when installed to specification. Allentown's typical wind gusts reach about 104 km/h—well within this margin. The four-way interlocking design locks panels together, distributing wind load across the entire roof system rather than relying on fasteners alone. This engineered interlocking, combined with the non-combustible aluminum material (Class A fire rating available, ICC-ES ESR-1790 certified), gives you both wind and fire protection that asphalt cannot replicate.

Interlock aluminum roofing carries a UL 2218 Class 4 impact rating—the highest available—and the warranty even covers perforation from hailstones up to 1.5 inches. This superior hail resistance may qualify you for homeowner's insurance discounts in regions prone to severe storms. The material's hardness and non-brittle nature mean impact resistance does not degrade over time, unlike asphalt or clay tile. Check with your insurance agent about potential premium reductions when you upgrade to a UL 2218 Class 4 roof.

Yes. Interlock's energy-efficient colors have thermal emissivity of 0.84 and initial solar reflectance up to 0.55, meaning they reflect solar heat instead of absorbing it like asphalt. This reduces cooling load, especially valuable as Allentown receives about 3083 sunshine hours annually. The Cool Roof Rating Council rating confirms measured performance. Light-colored profiles (e.g., Aged Copper Penny) provide the highest reflectance. Over a 50-year lifespan, the cumulative energy savings compound—making this a long-term climate investment, not just a roof replacement.

Interlock aluminum roofing is CALGreen-verified for reduced maintenance and requires no annual roof treatments, sealing, or recoating. Asphalt shingles demand re-sealing and granule replacement; wood shakes need fungicide and oil treatments; concrete tile requires moss removal and joint repointing. With aluminum, you perform basic gutter cleaning and remove debris after storms. The non-porous surface resists algae and lichen growth. Allentown's 1137 mm annual rainfall keeps the roof naturally clean and reduces the buildup that accelerates aging on traditional materials.

The Guardian warranty provides a lifetime limited, non-prorated material warranty for the original owner—covering rusting, rotting, splitting, cracking, curling, and loss of impact resistance. It transfers once to the next owner, giving them 50 years of coverage from completion. This longevity reflects the product's design: roofing-grade aluminum that never corrodes, a 30-year PVDF coating warranty (ASTM D4214 / D2244 tested), and impact resistance that does not degrade. Most owners view this as their final roof purchase.

Interlock Roofing of America has served Allentown and surrounding regions since 2014, providing local expertise in installation, warranty support, and service. A local installer familiar with Pennsylvania's freeze-thaw cycles, snow patterns, and building codes ensures your roof is spec-installed for 120 mph wind resistance and proper water shedding. Contact Interlock Roofing of America to schedule an inspection, discuss your home's current roof condition, and explore financing options for your next permanent roof.

Yes. Allentown averages about 60 cm of snow, 1137 mm of rain, roughly 80 freeze–thaw days a year, with peak wind gusts near 104 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.