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

Metal roofs shed snow and ice better than asphalt because the smooth, hard surface—especially Slate and Standing Seam profiles—doesn't allow ice to grip. Union Gap receives about 112 cm of snow annually and experiences roughly 101 freeze-thaw days per year, which is where metal's advantage shows: asphalt degrades under repeated freeze-thaw cycling, but aluminum's oxide layer self-heals after stress. Our panels are warranted to 120 mph wind resistance, so snow won't shift them during the Yakima County wind gusts that reach 87 km/h. Optional snow guards can be installed if you need extra control.

No—aluminum actually thrives under freeze-thaw stress. With about 101 freeze-thaw cycles per year in Union Gap and annual snowfall around 112 cm, your roof faces real material fatigue. Asphalt shingles crack and curl under this punishment. Aluminum contains no iron, so it cannot rust or rot; its protective oxide layer self-heals when flexed by temperature swings. The Alunar 70% PVDF fluorocarbon coating (warranted 30 years against degradation) stays intact through that winter-to-spring transition, protecting the metal beneath for the lifetime of your home.

Aluminum roofing cannot rust because aluminum contains no iron—the element that oxidizes and causes rust. Steel roofs corrode, but Interlock's roofing-grade 3105-H24 aluminum alloy (ASTM B209) is inherently corrosion-resistant. Union Gap averages 336 mm of rain yearly, plus 112 cm of snow, creating constant moisture. The Alunar coating—applied to both sides of every panel—adds a 30-year warranted shield against environmental degradation. Even if the coating is scratched, aluminum's oxide layer self-heals, protecting the metal indefinitely. That's why Interlock panels have been installed from coastal salt-air homes to Antarctica.

Yes, when you choose an energy-efficient color. Interlock's cool-roof-rated finishes achieve solar reflectance up to 0.55 and thermal emissivity of 0.84, bouncing heat away instead of absorbing it like asphalt. Union Gap enjoys about 3,478 sunshine hours annually, so reflective aluminum keeps your attic and home cooler during those bright months. Cool metal roofs reduce air-conditioning demand compared to dark asphalt, which absorbs and radiates the same solar energy. The energy savings compound over decades, offsetting the roof's cost.

Many insurers do reward hail-resistant roofing, so contact yours before installation. Interlock metal roofing carries a UL 2218 Class 4 impact rating—the highest available—and the Guardian Warranty covers perforation from hailstones up to 1.5 inches. That class 4 rating signals durability to underwriters evaluating storm risk in Yakima County. Your agent may lower your premium because metal roofs reduce the likelihood of costly claims. Request a quote from your current insurer mentioning the UL 2218 Class 4 rating; the savings over the roof's life can be significant.

No structural reinforcement is needed. Interlock's Mediterranean Tile profile installs at just 0.59 lb/sq ft—about 96% lighter than concrete or clay tile—and the Slate at 0.41 lb/sq ft. This extraordinary light weight means existing roof framing easily supports the metal panels without costly upgrades. Many homeowners install Interlock over their current asphalt roof, eliminating tear-off labor and waste. Union Gap's typical wind gusts of 15 km/h with peaks to 87 km/h won't stress a lightweight metal roof secured to spec. You get the look of heavy tile or slate without the structural cost.

Metal requires significantly less maintenance. Asphalt shingles need regular cleaning, gutter clearing, and frequent repairs as granules shed and wind lifts edges. Interlock aluminum won't rot, split, crack, or curl—problems that plague asphalt, wood, and tile. Union Gap's 336 mm annual rain and 3,478 sunshine hours create UV and moisture stress; asphalt deteriorates rapidly under that cycle. Metal's smooth surface sheds debris and resists algae growth. The 30-year Alunar coating warranty covers fading and chalking. Over a 50-year roof life, the maintenance savings—and freedom from emergency repairs—justify the metal choice.

Yes, aluminum roofing achieves Class A fire classification—the highest rating—because it's non-combustible. The product carries ICC-ES evaluation ESR-1790 (current through 2025), meeting IBC and IRC fire codes. Aluminum cannot ignite or spread flame, a property that matters if your home is near wildland or if you're in a high-fire insurance tier. Washington's dry season (peak risk July through September) makes fire resistance valuable; underwriters and building officials recognize Class A ratings. Some insurers offer lower premiums for non-combustible roofing, adding to the long-term savings.

Interlock offers five profiles: Slate, Cedar Shingle, Shake, Standing Seam, and Mediterranean Tile. Each replicates the visual depth and character of its namesake material—shadow lines and texture that complement historic or contemporary homes. The Slate and Cedar Shingle profiles suit Pacific Northwest architecture; the Mediterranean Tile works for modern or eclectic designs; Standing Seam delivers a clean, contemporary line. All profiles use the same roofing-grade aluminum and Alunar coating, so your choice is purely aesthetic. Union Gap homeowners can select the profile that matches their home's character while gaining metal's durability and 120 mph wind warranty.

Installation typically takes three to seven days, depending on roof size and complexity. Interlock Metal Roofing (PNW) Inc. has served the region since 1997, so our local team understands Union Gap's weather windows and building permits. One major advantage: panels install directly over your existing asphalt roof in most cases, eliminating the tear-off and landfill cost. The four-way interlocking design means each panel locks to its neighbors, creating a solid, weathertight surface. Current promotion offers no payments and no interest until Spring 2027, or 10% off installation. Our crew can walk you through the timeline and financing during a free inspection.

Yes. Union Gap averages about 112 cm of snow, 336 mm of rain, roughly 101 freeze–thaw days a year, with peak wind gusts near 87 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.