Metal Roofing in SeaTac, Washington — Lifetime Interlock® Aluminum Shingles Installed Locally
SeaTac Metal Roofing Experts Installing Lifetime Interlock® Aluminum Shingles Since 1997
What do Interlock customers in Washington say?
Interlock has 734 published customer reviews from Washington, covering installations reviewed between 1999 and 2026. They average 4.7 out of 5, with 669 collected through independent GuildQuality surveys. Interlock® Slate is the most frequently installed system in the region, appearing in 287 of these projects. Across the surveys that scored individual categories, quality of materials rates highest at 4.9 out of 5.
Metal Roofing Built for SeaTac's Heavy Rain, Snow Loads, Windstorms & Lifetime Protection
Interlock Metal Roofing (PNW) Inc. is SeaTac, Washington’s trusted local metal roofing contractor, proudly serving homeowners since 1997. As the exclusive authorized installer of Interlock® Lifetime Aluminum Roofing Systems, we deliver unmatched performance, beauty, and durability tailored for the Pacific Northwest’s unique climate. SeaTac’s frequent rain, occasional snow, and seasonal storms demand a roof engineered for heavy-gauge strength, fire resistance, and energy efficiency. Our cool roof solutions are designed to shed snow quickly, prevent moss growth, and withstand high winds, ensuring your home stays protected year-round. Choose from slate, cedar shingles, shake, Mediterranean tile, or standing seam profiles—all featuring the advanced Alunar® Coating System and backed by a Lifetime Warranty. For roof replacement or re-roofing in SeaTac, trust Interlock Metal Roofing (PNW) Inc. for a roof that’s as beautiful as it is resilient.
Performance you can measure (all climates)
Weather Resistant
Tested to 193+ km/h (120 mph) winds
Durable
Lifetime-Limited, transferable warranty
Energy Efficient
Reflective cool-roof lowers cooling costs
Rain & Moisture Proof
Repels ~1280 mm of rain a year
Corrosion Resistant
Aluminum does not develop iron rust
- Aluminum coated with the Alunar® Coating System (no visible aluminum surface) for enhanced corrosion resistance and long-term color retention
- Precision weatherproof seams (profiles: slate, cedar, shake, tile) and mechanical fastening (profile: standing seam) deliver long-term leak protection during wind-driven rain events
- Designed for SeaTac’s marine exposure—coatings and alloy resist salt air and coastal moisture from Puget Sound
- Tested to 120+ mph (193+ km/h) to withstand severe windstorms and gusts common to the Puget Sound corridor
- Advanced waterproof installation reduces leak risk during SeaTac’s atmospheric river events and prolonged winter rainfall
- Snow-shedding panels minimize accumulation and lower ice-dam risk during occasional King County snow and freeze–thaw cycles
- Seams and integrated drainage manage heavy rainfall and rooftop runoff typical of local roof pitches and eaves
- Class A fire-rated available for added protection and reduced ember vulnerability, appropriate for urban and suburban King County settings
- UL 2218 Class 4 impact resistance for hail, falling branches, and storm debris protection during regional storm episodes
- Cool-roof properties help limit attic heat gain during infrequent Pacific Northwest heat waves and improve year-round comfort
- Solar-compatible roof substrate and mounting access for bracket-mounted photovoltaic arrays on SeaTac homes
- Low-maintenance finish resists moss and algae growth on damp roofs—reduces cleaning and prolongs roof life in wet coastal conditions
- Fully recyclable aluminum supports sustainable construction practices favored in King County
- Architectural profiles replicate slate, cedar shake, and tile for authentic SeaTac curb appeal; standing-seam option available for contemporary designs
- Backed by a Lifetime‑Limited transferable warranty to protect long-term performance and home resale value
Metal roofing built for SeaTac's climate
Averages (10-yr): ~1280 mm rain and 33 cm snow per year, ~2931 sunshine hours, mean 11.3°C, typical daily-max winds ~15 km/h with gusts to 101 km/h, and ~21 freeze–thaw days per year.
- 33 cmavg. snow / year
- 1280 mmavg. rain / year
- 21freeze–thaw days / year
- 101 km/hpeak wind gusts
- 2931 hrsannual sunshine
- 11.3°Cmean temperature
Roof performance depends on the selected profile, tested assembly, roof structure and installation details. Class A fire-rated assemblies are available. Confirm applicable ratings in the testing reports and review the limited warranty before selecting a system.
Interlock Metal Roofing (PNW) Inc.
- 5608 17th Ave NW suite 1574, Seattle, WA 98107, United States
- Phone 206-589-8423
- Local lines Bellevue 425-225-4805 · Bellingham 360-502-4018 · Tacoma 253-352-2725 · Stanwood 206-202-7814 · Vancouver 360-873-5878
- Sales & Marketing sales@washingtonmetalroofing.com
- Toll-Free 1-866-733-5811
- Customer Service pnwservice@interlockroofing.com
- www.WashingtonMetalRoofing.com
- License WA #INTERMR75406
- Serving Washington since 1997 — 28 years
Hours
- Monday9:00 AM – 5:00 PM
- Tuesday9:00 AM – 5:00 PM
- Wednesday9:00 AM – 5:00 PM
- Thursday9:00 AM – 5:00 PM
- Friday9:00 AM – 5:00 PM
- SaturdayBy appointment
- SundayBy appointment
Interlock Metal Roofing (PNW) Inc. – Washington is a trusted metal roofing contractor proudly serving homeowners and businesses throughout Washington State. With decades of experience in the roofing industry, Interlock has built a reputation for unmatched quality, reliability, and customer satisfaction. As a specialized installer of premium aluminum and standing seam metal roofs, Interlock is an exclusive authorized installer of top-tier roofing systems designed for performance, longevity, and weather resilience — specifically engineered for the Pacific Northwest climate. Founded on principles of craftsmanship and integrity, Interlock Metal Roofing (PNW) Inc. has completed thousands of roofing projects with precision and professionalism, earning the loyalty of customers from Seattle to Spokane. Our team is known for timely project delivery, transparent communication, and exceptional workmanship, backed by robust warranties and industry-leading materials. Interlock’s commitment to excellence has been recognized through local and regional industry awards for safety, quality, and customer service. We stand out for our rigorous training standards, OSHA-certified crews, and adherence to best practices in roofing performance and installation safety. Whether it’s a residential metal re-roof, commercial roof installation, or custom architectural metal roofing, Interlock Metal Roofing (PNW) Inc. brings trusted expertise, lasting product solutions, and an unwavering focus on client satisfaction. Homes and businesses throughout Washington choose Interlock as their go-to metal roofing specialist because we deliver durable, high-performance roofs that stand the test of time.
Recognition GuildQuality Guildmaster Award — verified customer satisfaction (GuildQuality)
Accredited BBB Accredited A+
Get a Free Metal Roof Estimate in SeaTac, Washington
Interlock® Aluminum Roofing — all-climates performance specs for SeaTac, Washington
| Spec / Rating | Climate / Risk Factor + What It Solves |
|---|---|
| Wind resistance: 120+ mph (193+ kph) | Extreme wind, hurricanes, storm uplift: full interlocking attachment helps prevent blow-offs, edge lifting, and panel loss in high-gust events. |
| Fire rating: Class A (with proper assembly) | Wildfire, embers, radiant heat, chimney sparks: non-combustible roof assembly provides the highest residential fire protection rating. |
| Hail resistance: UL 2218 Class 4 | Hail and impact debris: highest impact classification; resists cracking, splitting, and surface loss common with asphalt under hail strikes. |
| Snow & ice performance: interlocking, shedding profile | Heavy snow, freeze-thaw, ice dams: smooth aluminum sheds snow efficiently and the interlocking design helps block water intrusion when melt-refreeze cycles occur. (Final snow-load capacity depends on roof structure and local code.) |
| Corrosion resistance: aluminum (won’t rust) | Salt air, coastal humidity, wet climates: aluminum naturally resists rust and corrosion, reducing long-term failure risk in marine or high-moisture environments. |
| Heat / UV durability: baked-on coating system | High heat, intense sun, thermal cycling: coatings resist UV breakdown and temperature-swing fatigue, slowing fading and surface degradation. |
| Moss / algae resistance: smooth coated surface | Wet shade, organic growth: low-porosity metal surface gives moss/algae less to grip, reducing staining and maintenance. |
| Material: heavy-gauge aluminum roof profiles (Slate / Shake / Shingle / Tile / Standing Seam) | All-season structural stability: lightweight, dent-resistant metal system stays stable through large hot-cold swings and severe weather. |
| Expected lifespan: 50+ years | Long-term durability across climates: avoids re-roof cycles typical of shorter-life materials, even in high-stress environments. |
| Warranty: Lifetime-Limited, non-prorated + 50-year transferable | Lifetime protection + resale value: guarantees long-term material confidence and transfers to future owners. |
Available Profiles in SeaTac, Washington:
Explore all Interlock® metal roofing systems, or see the Guardian lifetime warranty and independent testing reports.
Recent Interlock® roofs across Washington
9 completed Interlock® metal roofs in SeaTac, WA
Interlock® has completed 9 metal roofs in SeaTac, Washington between 1999–2019, across 5 roof profiles (Tile, Shingle, Shake, IB Membrane, Standing Seam). Every marker is a real, anonymized installation completed by an Interlock Installer — explore them on the interactive map and photo grid below, filterable by profile, colour and year of completion.
- 9completed roofs
- 5roof profiles
- 1999–2019years
Open SeaTac on the interactive project map →Browse all Interlock® projects in Washington →See more Interlock® projects →
What our customers are saying:
They are a little pricey.
Nearby service areas in King County
Interlock® metal roofing is also installed in these communities near SeaTac:
Interlock Metal Roofing (PNW) Inc. also services nearby States
Beyond SeaTac, our team installs Interlock® metal roofing across:
