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

Yes—Interlock panels are engineered to shed snow and resist ice dam formation better than asphalt. With about 60 cm of snow falling annually in your area and roughly 38 freeze-thaw cycles per year, the smooth, hard aluminum surface (3105-H24 alloy) allows snow to slide cleanly rather than bond to the roof. The four-way interlocking profile creates a solid plane that won't allow water to pool and refreeze at the eave. Optional snow guards can be installed if you want to control the timing of snow discharge for safety. No special winterization is needed; the coating's 30-year durability guarantee holds through repeated thaw cycles.

The four-way interlocking aluminum panels are designed so water flows downward and outward—never pools or sits on a seam. Each panel locks to its neighbors on all four sides, creating a continuous shed plane that directs the roughly 2,305 mm of annual rainfall straight down the roof and into gutters. The aluminum alloy (ASTM B209 rated) itself is corrosion-proof because it has no iron content; its oxide layer self-heals if scratched. Combined with proper underlayment and flashing installed by our PNW team, this system has protected coastal homes and research stations worldwide. The Guardian warranty covers leakage from manufacturing defect for the life of the original owner.

Aluminum cannot rust because it contains no iron—that's the core advantage of Interlock roofing in a rain-heavy, salt-air region like Grays Harbor. Steel roofs oxidize and corrode; aluminum develops a thin, self-healing oxide layer that protects the substrate permanently. The Alunar 70% PVDF fluorocarbon coating is applied to both sides of every panel and carries a 30-year warranty against chalking and fading (ASTM D4214/D2244 measured). This dual protection is especially valuable in your climate, where 2,305 mm of annual rainfall and frequent 15 km/h winds with gusts to 106 km/h create constant moisture and salt exposure. You'll never refinish, re-coat, or treat a metal aluminum roof for corrosion.

Yes. Interlock roofing is warranted to resist wind speeds up to 120 mph (193 km/h) when installed per spec. East Hoquiam's typical daily-maximum winds are about 15 km/h with gusts reaching 106 km/h—well within that range. The four-way interlocking design means each panel locks securely to its neighbors on all four edges, distributing wind load across the entire roof system rather than putting stress on individual fasteners. The ICC-ES evaluation report ESR-1790 confirms this assembly meets current building code. Once installed by our certified team, your roof will move as one unit, not flex or rattle. That's why metal interlocking panels perform better in exposed coastal sites than panels fastened only at the sides.

Interlock carries a UL 2218 Class 4 impact rating—the highest available—and the warranty covers perforation from hailstones up to 1.5 inches. Class 4 means it's tested and rated to withstand severe hail events. Many insurance companies recognize this and offer discounts on homeowner policies for Class 4 metal roofs because the risk of hail-related claims drops significantly. You'll want to contact your agent with Interlock's UL 2218 rating and the Guardian warranty details to see what your policy allows. In a region with 2,789 sunshine hours annually and relatively low hail frequency, this certification still provides peace of mind and can offset installation cost over time through premium reductions or self-insurance savings.

No structural reinforcement is needed. Interlock's Mediterranean Tile profile—which mimics the heaviest traditional material—installs at just 0.59 lb per square foot, making it roughly 96% lighter than concrete or clay tile. The Cedar Shingle is 0.41 lb/sq ft and the Shake 0.58 lb/sq ft. Because aluminum weighs so little, Interlock can typically install over your existing roof without adding load stress. Your home's framing was built to handle asphalt shingles (about 2.5–4 lb/sq ft); metal aluminum is a fraction of that, often reducing strain rather than increasing it. This lightweight advantage also means faster installation by our PNW crew and zero risk of sagging or structural fatigue over the roof's lifetime—even through 38 annual freeze-thaw cycles.

Interlock offers a lifetime limited, non-prorated material warranty for the original owner, covering rusting, rotting, splitting, cracking, curling, and loss of impact resistance. The Guardian warranty is also one-time transferable: the next owner receives 50 years of coverage from installation date. That means if you install now and sell in 20 years, the new owner still has 30 years of guardian coverage. The Alunar 70% PVDF fluorocarbon coating carries a separate 30-year warranty against chalking and fading (ASTM D4214/D2244 rated). In practice, the 3105-H24 aluminum alloy and sealed four-way interlocking design are proven durable for decades—Interlock has been manufacturing since 1998 and installed roofs ranging from coastal homes to an Antarctic research station. This is your last roof purchase.

Interlock metal roofing requires virtually no maintenance—no recoating, no sealant reapplication, no replacement of broken or curled shingles. Asphalt shingles need inspection and sealing every few years; wood shakes require treatment against rot, moss, and UV damage; tile must be inspected for cracked units. Aluminum doesn't rot, split, curl, or attract moss the way wood does. Rain and wind naturally clean the surface; debris is easily cleared during your annual gutter cleaning. The Alunar 70% PVDF coating (applied to both sides) is warranted 30 years against fading, and the aluminum itself is corrosion-proof. CALGreen verification confirms reduced maintenance requirements. Over 38 freeze-thaw cycles per year, zero thermal stress or material degradation occurs. You'll spend your time and money on other home projects, not roof repairs.

Yes—Interlock is the last roof you'll buy. Asphalt shingles typically last 15–25 years; you'll replace them two or three times in a homeowner's tenure. Each replacement means tear-off labor, landfill disposal fees, and material cost. Interlock's lifetime warranty and proven durability (manufactured since 1998, installed from coastal salt-air to Antarctic research stations) eliminate replacement cycles. There's no recoating, no sealant renewal, no emergency repairs. You may qualify for insurance discounts via the UL 2218 Class 4 hail rating. Plus, we're currently offering no payments and no interest until Spring 2027, or 10% off your installation. Over 40–50 years, the cost-per-year of a metal roof drops far below asphalt, and you'll never face mid-winter emergency shingle failure in a 106 km/h gust.

Yes. Interlock aluminum roofing is non-combustible and available in Class A fire classification—the highest rating. The ICC-ES evaluation report ESR-1790 (reissued 2025) confirms compliance with IBC/IRC building codes. The 3105-H24 aluminum alloy cannot ignite, spread flame, or release toxic gases. This matters if a wildfire threatens your region or a nearby structure fire spreads embers to your roof. Class A certification also often qualifies for insurance credits. The metal profile itself adds no fire load to your home, unlike wood shakes or asphalt. When combined with a fire-rated underlayment and proper flashing, Interlock becomes part of a robust passive fire defense. You meet or exceed local code, and you'll have documentation to show inspectors, lenders, or insurers.

Yes. East Hoquiam averages about 60 cm of snow, 2305 mm of rain, roughly 38 freeze–thaw days a year, with peak wind gusts near 106 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.