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

Yes—aluminum actually thrives in freeze-thaw climates. Unlike asphalt shingles or wood that crack and curl as water enters and expands during Gardners' roughly 69 freeze-thaw days per year, aluminum is non-porous. Water sits on the surface or drains away; it cannot penetrate and freeze inside the material. The metal expands and contracts uniformly without stress. Combined with the 55 cm of annual snow and 1110 mm of rain, Interlock's roofing sheds both water and ice cleanly, while the Alunar coating (30-year warranty against chalking and fading per ASTM D4214) maintains flexibility through temperature swings that would degrade conventional coatings.

The four-way interlocking design and smooth profiles shed snow and ice far more effectively than shingles, which trap moisture at edges and create dam zones. Gardners receives about 55 cm of snow annually, plus roughly 1110 mm of rain—a combination that loads asphalt roofs. Aluminum's light weight (the Shingle profile installs at 0.41 lb per square foot) means snow doesn't stress your structure the way slate or concrete tile would. The slippery surface encourages natural slide-off; optional snow guards can be installed where needed. Because aluminum conducts heat, it works with your attic ventilation to minimize ice-dam formation—a critical advantage over absorptive shingles in your climate.

Yes. Interlock's four-way interlocking aluminum panels are warranted to resist wind speeds up to 120 mph when installed to specification—well above the typical gusts your area experiences (around 107 km/h or 66 mph in the 10-year normals). The interlocking geometry creates a unified system; individual panels cannot lift or separate during storms. Adams County's average daily-maximum winds of about 19 km/h pose no stress. The UL 2218 Class 4 hail rating (the highest impact classification available) is actually a proxy for panel rigidity and fastening integrity, which also ensures wind performance. Your Interlock installer, serving the region since 2014, can confirm installation details that optimize hold-down under local wind patterns.

Aluminum cannot rust because it contains no iron. Steel and other ferrous metals oxidize into crumbly rust when exposed to moisture; aluminum forms a thin, transparent oxide layer that actually protects the underlying metal and self-heals when scratched. This is why Interlock aluminum has been installed from coastal salt-air homes to an Antarctic research station since 1998 without corrosion failures. The roofing-grade 3105-H24 and 3003-H24 aluminum alloy (ASTM B209) is the same material used in aircraft. In Gardners' climate—with roughly 1110 mm annual rainfall and 69 freeze-thaw days—moisture is constant, but it simply cannot trigger rust on aluminum the way it does on galvanized steel or exposed fasteners. The Alunar coating on both sides adds a 30-year color-life warranty.

Interlock achieves UL 2218 Class 4, the highest impact rating available—tested with 2-inch steel balls dropped from 20 feet. The warranty even covers perforation from hailstones up to 1.5 inches. Many insurers offer discounts for Class 4 roofs because the claim frequency and replacement cost are dramatically lower than for asphalt shingles, which dent and lose granules in hail and then leak years later. Gardners sits in a region where spring and summer hail is a real risk. Document the UL 2218 Class 4 rating and ICC-ES ESR-1790 evaluation when you file your insurance information; your agent can advise on premium reductions. The light weight (roughly 96% lighter than traditional tile) also means no structural upgrade is needed, which some policies flag as a separate saving.

Significantly less than asphalt, wood, or ceramic tile. Asphalt requires annual debris clearing, algae treatment, and shingle replacement starting around year 15. Wood shakes need regular sealing and split replacement. Aluminum simply sheds leaves and debris—the smooth profiles do not trap material the way shingles do. You'll never re-coat, re-seal, or replace individual pieces. Occasional gutter cleaning (standard for any roof in areas with 1110 mm annual rainfall like Gardners) is your main task. The Alunar 70% PVDF fluorocarbon finish, applied to both sides and warranted 30 years against chalking and fading, eliminates the oxidation and color-fade issues that plague painted metal roofs. CALGreen verification confirms reduced-maintenance status. Over 55+ years, you'll save thousands in labor and materials compared to the conventional roof-replacement cycle.

Yes, especially if you choose an energy-efficient color. Interlock offers finishes with initial solar reflectance up to 0.55 (Aged Copper Penny) and thermal emissivity up to 0.84—meaning the roof reflects rather than absorbs the sun's heat. In Gardners' climate, with about 3133 annual sunshine hours spread across warm summers and cold winters, a reflective roof reduces summer air-conditioning load without compromising winter heat retention (emissivity ensures the roof releases heat to the night sky year-round). energy-efficiency and Cool Roof Rating Council certification confirms the performance claim. Compared to dark asphalt shingles, which absorb heat and raise attic temperatures by 20–40°F on sunny days, aluminum's reflectivity keeps your structure cooler. The energy savings compound over decades, especially as electricity costs rise.

The Guardian is a lifetime limited, non-prorated material warranty for the original owner—covering rusting, rotting, splitting, cracking, curling, and loss of impact resistance. Unlike prorated warranties that pay out less each year, this one covers full replacement value for as long as you own the home. It is one-time transferable, giving the next owner 50 years of coverage from completion. No other roofing material offers this combination. Combined with the 30-year coating warranty (ASTM D4214/D2244 measured), you are protected against color fade and chalk for three decades and material failure for life. In Gardners' harsh environment—69 freeze-thaw days, 55 cm snow, and frequent rain—the non-prorated structure means you never face a bill for a failed panel or fastener. The transferability also boosts your home's resale appeal and buyer confidence.

Yes, in most cases. Interlock's extraordinary light weight—the Shingle profile at 0.41 lb per square foot, Shake at 0.58, and Tile at 0.59—installs over most existing roofs without structural reinforcement. Your local installer, Interlock Roofing of America, serving the region since 2014, evaluates your deck and existing shingles to confirm suitability. Stripping is not always required, saving labor and disposal costs. A solid deck is prepared, underlayment applied, and the four-way interlocking panels fastened according to ICC-ES ESR-1790 (reissued 2025) specification. Installation typically spans 1–2 weeks depending on roof size and complexity. Because you avoid the tear-off-to-landfill cycle (asphalt shingles add millions of tons to landfills yearly), you also reduce waste and disruption. Your installer will discuss timeline and prep with you during the site visit.

Metal roofing costs more upfront than asphalt but is the last roof you will buy. A typical asphalt roof lasts 15–25 years and requires replacement 2–3 times over a 55-year span—each time incurring tear-off, labor, and landfill fees. Interlock's lifetime limited warranty (non-prorated for the original owner and 50-year transferable for the next) means you replace it only if catastrophic damage occurs, not aging. The Alunar 70% PVDF fluorocarbon coating, warranted 30 years against fade and chalk, eliminates the re-coating costs that painted metals demand every 10–15 years. Add energy savings from energy-efficiency reflectance (reducing summer cooling load across Gardners' 3133 annual sunshine hours) and maintenance elimination, and the total cost of ownership is lower by your second decade. Insurance discounts (UL 2218 Class 4 hail rating) and resale appeal further offset the initial premium. For homeowners staying long-term, it is the most economical choice.