Metal Roofing in Possession, Washington — Lifetime Interlock® Aluminum Shingles Installed Locally

Yes—aluminum's smooth, hard surface sheds snow effectively without absorbing moisture that causes ice dams. Island County averages about 37 cm of snow and roughly 31 freeze-thaw days per year, which corrode asphalt and wood but leave aluminum unchanged. The four-way interlocking panels stay watertight through winter expansion and contraction. Snow guards are available if you want to control shedding on steep slopes.

Aluminum contains no iron, so rust is chemically impossible. Instead, it forms a protective oxide layer that self-heals when scratched—a property that matters in Possession's rainy environment (about 1148 mm annually). We apply Alunar 70% PVDF fluorocarbon coating to both sides of every panel, warranted 30 years against chalking and fading. Steel roofing must be painted and sealed repeatedly to prevent rust; aluminum simply cannot corrode.

No. The four-way interlocking aluminum panels create a continuous lock that sheds water faster than asphalt, even during Possession's average 1148 mm of annual rainfall. Each panel overlaps its neighbors on all four sides; water runs down and out, never sideways into seams. The solid deck and underlayment prevent any sound or splash—it performs identically to asphalt in a downpour, just with zero degradation over time.

Absolutely. Possession experiences typical gusts around 112 km/h, and Interlock metal roofing is warranted to resist wind speeds up to 120 mph (193 km/h) when installed to spec. The four-way interlocking design locks each panel to its neighbors, distributing wind load across the entire roof rather than stressing individual fasteners. UL 2218 Class 4 hail-rated panels are built tough enough to handle both wind and weather.

Interlock metal roofing carries UL 2218 Class 4 impact rating—the highest available—and our warranty even covers perforation from hailstones up to 1.5 inches. Many insurers recognize this durability and offer premium discounts for metal roofs in Washington. Ask your agent about hail-resistant rating benefits; the combination of aluminum's strength and our 30-year warranty often surprises homeowners when they see savings.

Metal roofing is dramatically lighter. Interlock's Slate installs at about 0.41 lb/sq ft—roughly the weight of asphalt shingles. Our Mediterranean Tile profile weighs only 0.59 lb/sq ft, about 96% lighter than real concrete or clay tile, so no structural reinforcement is ever needed. You can install it directly over most existing roofs, saving time and expense. This matters in Possession's climate because lighter loads mean fewer freeze-thaw stresses on your framing.

The Guardian Warranty is a lifetime limited, non-prorated material warranty for the original owner, covering rusting, rotting, splitting, cracking, curling, and loss of impact resistance. It's one-time transferable, giving the next owner 50 years from completion—valuable when you sell. The Alunar coating alone is warranted 30 years. Manufactured since 1998 in Delta, BC, and installed from coastal salt-air homes to Antarctic research stations, the product has proven durability across extreme climates.

Yes, especially in summer. energy-efficient Interlock colors achieve initial solar reflectance up to 0.55 and thermal emissivity of 0.84, rated by the Cool Roof Rating Council. Possession gets about 2898 sunshine hours per year; reflective coatings bounce heat away rather than absorbing it like dark asphalt. This reduces cooling load in summer months and lowers energy bills year-round. The effect is modest in cloudy climates but real—every hour of sun counts.

Almost none. Asphalt shingles degrade from UV and weather, wood shakes split and curl, and tile cracks—all requiring repair or replacement. Interlock aluminum resists all three because it doesn't absorb moisture and its oxide layer doesn't break down. Rinse it occasionally to keep it clean; that's it. The Alunar finish is CALGreen-verified for reduced maintenance. Over 25 years, the labor and materials you save on maintenance alone justify the upgrade.

Yes. Because Interlock panels weigh only 0.41–0.59 lb/sq ft, installation over most existing roofs requires no structural reinforcement or tear-off. This saves time, labor, and landfill waste. Our regional installer, Interlock Metal Roofing (PNW) Inc., has served the area since 1997 and can discuss your home's specific structure. The installation process is faster than asphalt replacement, and you're not paying to haul tons of old shingles away. Current promotion: no payments and no interest until Spring 2027, or 10% off installation.

Yes. Possession averages about 37 cm of snow, 1148 mm of rain, roughly 31 freeze–thaw days a year, with peak wind gusts near 112 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.