Metal Roofing in Friday Harbor, Washington — Lifetime Interlock® Aluminum Shingles Installed Locally
Friday Harbor 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 Friday Harbor's Heavy Rain, Snow Loads, Windstorms & Lifetime Protection
Interlock Metal Roofing (PNW) Inc. is the trusted local metal roofing contractor and exclusive authorized installer of Interlock® Lifetime Aluminum Roofing Systems in Friday Harbor, Washington. Since 1997, we have helped homeowners in the San Juan Islands protect their homes from the region’s unique weather challenges, including heavy rain, coastal winds, and occasional snow. Our heavy-gauge, fire-resistant, and energy-efficient cool roofs are engineered for superior snow shedding and long-term durability, making them ideal for the Pacific Northwest climate. Choose from the timeless beauty of slate, cedar shingles, shake, Mediterranean tile, or standing seam profiles—all with the unmatched strength of metal. Every Interlock roof is protected by the advanced Alunar® Coating System and backed by a Lifetime Warranty, ensuring your Friday Harbor home stays safe, beautiful, and energy-efficient for decades. Trust Interlock Metal Roofing (PNW) Inc. for expert roof replacement and re-roofing services designed for the unique needs of Friday Harbor homeowners.
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 ~1015 mm of rain a year
Corrosion Resistant
Aluminum does not develop iron rust
- Coastal salt-air protection — aluminum panels coated with the Alunar® Coating System (no visible aluminum surface) resist corrosion from marine salt spray common around Friday Harbor.
- Atmospheric-river resilience — engineered to shed prolonged, high-volume rainfall events that can affect Friday Harbor and surrounding San Juan County.
- Moss and biological-growth resistance — smooth finish and tight interlocks reduce surface moisture retention and inhibit moss and lichen buildup on Friday Harbor roofs.
- Precision weatherproof seams (profiles: slate, cedar, shake, tile) and mechanical fastening (profile: standing seam) deliver long-term leak protection during wind-driven rain events
- Tested to 193+ km/h (120+ mph) for severe coastal windstorms and gust events.
- Corrosion-proof aluminum construction reduces long-term maintenance in marine-exposed applications.
- Class A fire-rated available to help protect properties from ember exposure during regional wildfire advisories.
- UL 2218 Class 4 impact resistance for protection against hail and falling branches.
- Snow-shedding metal panels reduce buildup and help prevent ice dams during occasional freeze–thaw cycles.
- Lower installed weight reduces structural loading on older Friday Harbor homes compared with asphalt shingles.
- Energy-efficient cool-roof performance lowers attic temperatures during summer heat waves in Friday Harbor.
- Solar-compatible: engineered for modern bracket-mounted photovoltaic systems for Friday Harbor installations.
- Fully recyclable aluminum supports San Juan County sustainability goals and reduces end-of-life landfill impact.
- Premium architectural profiles replicate slate, cedar shake, and tile to suit Friday Harbor’s historic and waterfront home styles.
- Low-maintenance finish and interlocking design minimize routine upkeep for island homeowners with limited contractor access.
- Backed by a Lifetime-Limited transferable warranty that helps protect long-term resale value for Friday Harbor properties.
Metal roofing built for Friday Harbor's climate
Averages (10-yr): ~1015 mm rain and 30 cm snow per year, ~3119 sunshine hours, mean 10.5°C, typical daily-max winds ~20 km/h with gusts to 111 km/h, and ~15 freeze–thaw days per year.
- 30 cmavg. snow / year
- 1015 mmavg. rain / year
- 15freeze–thaw days / year
- 111 km/hpeak wind gusts
- 3119 hrsannual sunshine
- 10.5°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 Friday Harbor, Washington
Interlock® Aluminum Roofing — all-climates performance specs for Friday Harbor, 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 Friday Harbor, Washington:
Explore all Interlock® metal roofing systems, or see the Guardian lifetime warranty and independent testing reports.
Recent Interlock® roofs across Washington
3 completed Interlock® metal roofs in Friday Harbor, WA
Interlock® has completed 3 metal roofs in Friday Harbor, Washington between 1999–2016, across 2 roof profiles (Slate, Shingle). 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.
- 3completed roofs
- 2roof profiles
- 1999–2016years
Open Friday Harbor on the interactive project map →Browse all Interlock® projects in Washington →See more Interlock® projects →
What our customers are saying:
Great experience...great quality product. Simply cannot afford it
Nearby service areas in San Juan County
Interlock® metal roofing is also installed in these communities near Friday Harbor:
Interlock Metal Roofing (PNW) Inc. also services nearby States
Beyond Friday Harbor, our team installs Interlock® metal roofing across:
