Metal Roofing in Duluth, Washington — Lifetime Interlock® Aluminum Shingles Installed Locally
Duluth 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 Duluth's Heavy Rain, Snow Loads, Windstorms & Lifetime Protection
Interlock Metal Roofing (PNW) Inc. is Duluth, Washington’s trusted metal roofing contractor, proudly serving local 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. Our heavy-gauge, fire-resistant roofs are engineered to withstand Duluth’s wet winters, heavy snowfall, and seasonal storms, providing superior snow shedding and long-term protection against moss, leaks, and wind damage. Choose from slate, cedar shingles, shake, Mediterranean tile, or standing seam styles—all protected by the advanced Alunar® Coating System and backed by a Lifetime Warranty. For energy-efficient, cool roof solutions and expert roof replacement or re-roofing in Duluth, trust Interlock Metal Roofing (PNW) Inc. to safeguard your home with the best roof for Washington’s demanding weather.
Performance you can measure (all climates)
Weather Resistant
Tested to 193+ km/h (120 mph) winds
Durable
Lifetime-Limited, transferable warranty
Rain & Moisture Proof
Repels ~2163 mm of rain a year
Energy Efficient
Reflective cool-roof lowers cooling costs
Snow-Shedding
Built for ~163 cm of snow a year
- Authorized Interlock® Lifetime Aluminum Roofing Systems installer serving homeowners in Duluth, Washington and throughout Clark County
- Designed to handle Duluth’s Pacific‑influenced weather, including atmospheric rivers that deliver prolonged heavy precipitation
- Resists coastal salt‑air intrusion affecting lowland Clark County neighborhoods and riverfront properties, minimizing corrosion risk
- Tested to 193+ km/h (120+ mph) to withstand severe storm winds that track inland to Duluth
- Precision weatherproof seams (profiles: slate, cedar, shake, tile) and mechanical fastening (profile: standing seam) deliver long-term leak protection during wind-driven rain events
- Advanced waterproof installation methods provide durable leak resistance through Duluth’s wet seasons and wind‑driven rain
- Snow‑shedding metal panels reduce buildup and help prevent ice dams during occasional snowfall and freeze–thaw cycles in the region
- Built to tolerate rapid seasonal transitions and persistently damp roof conditions common to Clark County
- Class A fire-rated available for added protection during dry‑season wildfire and ember‑risk periods in southeast Clark County
- UL 2218 Class 4 impact resistance for protection from hail, falling branches, and storm debris around Duluth properties
- Energy‑efficient cool‑roof performance reduces heat gain during Pacific Northwest summer heat episodes and improves attic comfort
- Engineered for bracket‑mounted photovoltaic systems so Duluth homeowners can integrate solar arrays without compromising roof integrity
- Aluminum is Coated with the Alunar® Coating System (no visible aluminum surface) for durable finish and long-term color retention
- Premium architectural profiles replicate slate, cedar shake, tile, and standing seam to match Duluth curb appeal and neighborhood character
- Low‑maintenance design minimizes moss, lichen, and biological buildup on damp Clark County roofs, reducing cleaning and repair frequency
- Backed by a Lifetime‑Limited transferable warranty to protect Duluth homeowners’ investment and resale value
Metal roofing built for Duluth's climate
Averages (10-yr): ~2163 mm rain and 163 cm snow per year, ~2764 sunshine hours, mean 11.4°C, typical daily-max winds ~14 km/h with gusts to 115 km/h, and ~22 freeze–thaw days per year.
- 163 cmavg. snow / year
- 2163 mmavg. rain / year
- 22freeze–thaw days / year
- 115 km/hpeak wind gusts
- 2764 hrsannual sunshine
- 11.4°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 Duluth, Washington
Interlock® Aluminum Roofing — all-climates performance specs for Duluth, 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 Duluth, Washington:
Explore all Interlock® metal roofing systems, or see the Guardian lifetime warranty and independent testing reports.
Recent Interlock® roofs across Washington
Completed Interlock® metal roofs near Duluth, WA
Every marker is a real, anonymized Interlock® aluminum roof completed by an Interlock Installer. Explore verified Interlock® installations near Duluth, Washington, United States on the interactive project map and photo grid — filter by roof profile (Slate, Cedar Shingle, Shake, Mediterranean Tile, Standing Seam, Solid Copper), colour and year of completion.
Open Duluth on the interactive project map →Browse all Interlock® projects in Washington →See more Interlock® projects →
What our customers are saying:
Discover why homeowners in Ridgefield, WA trust Interlock Metal Roofing (PNW) Inc. for metal roofing—professional, fast, and exceptionally tidy installations backed by a lifetime guarantee.
It was a very positive experience. I certainly would recommend people to at least talk to them. They have a product that makes sense, particularly for younger families.
You might find that more people are installing solar, as I am. You could go over details more thoroughly regarding process.
We have had our interlock roof on for over 15 years. Still looks great no problems. We are glad that we don't have to worry about a roof anymore. They stand behind warranty.
Project was completed at nighttime, so the crew never returned the next day. That was fine, but they left behind metal scraps and loose nails on the ground, which they missed on the dark.
I have nothing against the product. The salesperson showed me the product and samples and I was impressed. Unfortunately, the price for that is completely outrageous (for me, since I'm retired).
My wife and I wanted a long-term roof and I think we found it. The product seems very good and are installer Daniel was terrific and a trooper put a lot of hours and a lot of time and made it look real nice when it was completed. I would recommend the company if you're looking for a metal roof.
We look forward to working with them, just not this year.
Nearby service areas in Clark County
Interlock® metal roofing is also installed in these communities near Duluth:
Interlock Metal Roofing (PNW) Inc. also services nearby States
Beyond Duluth, our team installs Interlock® metal roofing across:
