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

Interlock's four-way interlocking aluminum panels shed snow and ice effectively because the smooth, hard surface and slope prevent adhesion where asphalt shingles trap moisture. Union averages about 76 cm of snow annually across roughly 86 freeze-thaw cycles, conditions that crack and curl asphalt over time; aluminum's oxide layer simply refreshes itself and won't degrade. The Shake and Slate profiles create visual texture without pockets that catch ice dams. Snow guards are available if you want to control slides onto walkways.

Asphalt absorbs the 1043 mm of rain Union receives yearly, expanding when it freezes and contracting as it thaws—this cycle repeats roughly 86 times per year and causes permanent stress cracks, curling, and granule loss. Aluminum expands and contracts minimally; its 3105-H24 alloy remains stable across temperature swings. Interlock's Alunar 70% PVDF coating (warranted 30 years against chalking and fading per ASTM D4214) doesn't degrade from the freeze-thaw rhythm. The Guardian warranty covers cracking and curling—damage asphalt roofs face routinely here.

Yes. Union's typical gusts reach about 100 km/h; Interlock panels are warranted to resist wind speeds up to 120 mph (193 km/h) when installed to spec, exceeding your area's peak conditions by a significant margin. The four-way interlocking system locks panels together and to the deck, so panels don't lift or flutter. Installation by Interlock Roofing of America, serving the region since 2014, ensures the spec is followed. Even in severe gust events, the design prevents the panel separation that makes asphalt roofs vulnerable.

Aluminum cannot rust because it contains no iron—the element that corrodes in moisture. Instead, a thin oxide layer forms on bare aluminum and actually heals itself when scratched. Interlock's roofing-grade 3105-H24 and 3003-H24 alloy (ASTM B209) is paired with an Alunar 70% PVDF fluorocarbon finish applied to both sides of every panel, giving dual protection in wet climates like Union's. This is why Interlock panels have been installed from coastal salt-air homes to Antarctic research stations—salt and constant moisture don't degrade them.

Interlock's UL 2218 Class 4 impact rating is the highest available and signals durability to insurers; some carriers offer discounts for non-combustible, high-impact roofing. The Guardian warranty even covers perforation from hailstones up to 1.5 inches. Because Pennsylvania sees occasional severe weather, and Union's location in Washington County makes you subject to regional thunderstorm activity, this Class 4 rating reduces your claim risk and demonstrates loss prevention to your insurer. Speak with your agent about potential savings when you install.

No. Interlock panels are extraordinarily lightweight—the Cedar Shingle profile installs at about 0.41 lb/sq ft, and even the Mediterranean Tile is roughly 96% lighter than concrete or clay tile. Most existing roofs in Union can support this load without reinforcement, saving thousands in structural work. The ICC-ES evaluation report ESR-1790 (reissued 2025 for IBC/IRC) confirms installation compatibility over standard framing. Interlock Roofing of America can assess your deck during a site visit and confirm whether your home qualifies for a direct install over your existing roof.

The Guardian is a lifetime limited, non-prorated material warranty for the original owner—it covers rusting, rotting, splitting, cracking, curling, and loss of impact resistance. That means no coverage gaps based on age; a crack in year 30 is treated the same as in year 5. The warranty is one-time transferable, giving the next owner 50 years from completion. Combined with the 30-year coating warranty (ASTM D4214/D2244), this is the longest-term roof you'll install. Over Union's 86 annual freeze-thaw cycles, asphalt roofs require replacement every 15–20 years; Interlock often outlasts three asphalt roofs.

Five profiles: Slate, Cedar Shingle, Shake, Standing Seam, and Mediterranean Tile. Each replicates traditional material appearance using four-way interlocking aluminum panels with the same durability and lifespan. Slate suits colonial or craftsman homes; Cedar Shingle complements farmhouses and cottages; Shake adds rustic character; Standing Seam delivers modern-industrial clean lines; and Mediterranean Tile evokes European estates. All profiles are manufactured to spec in Delta, BC, and installed by Interlock Roofing of America. The chosen profile does not affect performance—only aesthetics and personal preference.

Interlock aluminum requires virtually no maintenance beyond annual gutters inspection—no granule loss to track, no moss treatment, no re-sealing. Asphalt shingles need roof cleaning every 3–5 years in rainy climates like Union's (1043 mm annually) to prevent algae and moss; wood shakes demand professional cleaning, re-staining, and gap sealing every 2–3 years. CALGreen-verified for reduced maintenance, Interlock's Alunar 70% PVDF coating resists algae and dirt adhesion naturally. Over 30 years, this means no labor cost and zero chemical treatments—a significant saving in both time and money.

Yes. Interlock Roofing of America has served the region since 2014 and is the authorized local installer for Interlock metal roofing. They handle site assessment, permitting, installation, and warranty administration. Their familiarity with Union's freeze-thaw cycling, moderate snow loads (76 cm annually), and local building codes means faster, code-compliant installation. Interlock panels are manufactured to ICC-ES ESR-1790 specs, so the installer's adherence to those installation standards ensures your warranty is valid. Contact them for a free site visit and quote.