Metal Roofing in Sumas, Washington — Lifetime Interlock® Aluminum Shingles Installed Locally
Sumas 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 Sumas'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 Sumas, Washington. Since 1997, we have provided homeowners with premium roof replacement and re-roofing services designed specifically for the unique weather challenges of the Pacific Northwest. Our heavy-gauge, fire-resistant, and energy-efficient cool roofs are engineered to withstand Sumas’ heavy rainfall, snow loads, and seasonal temperature swings, ensuring superior snow shedding and long-term protection. Choose from the timeless beauty of slate, cedar shingles, shake, Mediterranean tile, or standing seam profiles—all with the unmatched strength and durability of metal. Every Interlock roof is protected by the advanced Alunar® Coating System and backed by a Lifetime Warranty, making it the best choice for lasting performance, curb appeal, and peace of mind for your Sumas home.
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 ~1196 mm of rain a year
Corrosion Resistant
Aluminum does not develop iron rust
- Aluminum panels coated with the Alunar® Coating System (no visible aluminum surface) for durable, low-corrosion finish in Sumas and Whatcom County conditions
- Precision weatherproof seams (profiles: slate, cedar, shake, tile) and mechanical fastening (profile: standing seam) deliver long-term leak protection during wind-driven rain events
- Interlocking panel system tested to 120+ mph (193+ km/h) to withstand severe windstorms that can track through Whatcom County
- Advanced waterproof installation reduces leak risk during heavy rainfall and runoff common to Sumas lowlands
- Designed to shed snow and limit ice-dam formation, addressing local freeze–thaw cycles and occasional snow loads inland from the coast
- Corrosion-resistant aluminum finish fights prolonged dampness and high humidity typical of western Whatcom County roofs
- Class A fire-rated available for enhanced ember resistance during seasonal dry spells
- UL 2218 Class 4 impact resistance for protection from hail, falling branches, and storm debris
- Energy-efficient cool-roof performance reduces heat gain during summer warm spells and stabilizes attic temperatures
- Solar-compatible: engineered for bracket-mounted photovoltaic systems without compromising the weatherproof seam integrity
- Low-maintenance finish reduces moss and biological growth on shaded, moisture-prone Sumas roofs
- Tested mechanical fastening (standing seam) secures panels through rapid seasonal transitions and wind-driven rain events
- Backed by a transferable lifetime-limited warranty to protect resale value for homeowners across Sumas and Whatcom County
- Lightweight aluminum lowers structural load while meeting local snow-load considerations for Sumas-area homes
- Fully recyclable aluminum supports sustainable roofing choices for property owners in Sumas and the surrounding Whatcom County communities
Metal roofing built for Sumas's climate
Averages (10-yr): ~1196 mm rain and 35 cm snow per year, ~3005 sunshine hours, mean 10.3°C, typical daily-max winds ~20 km/h with gusts to 117 km/h, and ~34 freeze–thaw days per year.
- 35 cmavg. snow / year
- 1196 mmavg. rain / year
- 34freeze–thaw days / year
- 117 km/hpeak wind gusts
- 3005 hrsannual sunshine
- 10.3°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 Sumas, Washington
Interlock® Aluminum Roofing — all-climates performance specs for Sumas, 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 Sumas, 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 Sumas, WA
Every marker is a real, anonymized Interlock® aluminum roof completed by an Interlock Installer. Explore verified Interlock® installations near Sumas, 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 Sumas on the interactive project map →Browse all Interlock® projects in Washington →See more Interlock® projects →
What our customers are saying:
I tried for several years to find a roof i would be happy with that would enhance the beauty of my property. When Interlock Roofing came along it was such a relief! I have never driven down a road and exclaimed that is a beautiful roof. Now people tell me I have a beautiful roof! It really is!
This is probably the most professional experience I have had in years. I was blown away. From the time I contacted them, they were on time and did exactly what they said they would do the whole way through. Someone is doing an excellent job of directing this company. I need to contact Paul or Ross because I have more roofs to put on. I would give them a rating of 475! My roof cost twice as much as any other bid, but I am ten times happier than I would have been with any other roof.
They did great on everything.
Interlock Roofing could improve on their communication. We didn't know they were going to start on our project until they pulled up to start the job. We are happy with the product. It took three days for them to do our roof.
Quality control during installation could have been improved. It was expensive.
The only thing that they could have done better is to have brought their sign back. They have not returned the sign.
Weather in Northwestern Washington impacted the schedule by about 1 month, but that’s the weather we get
They could have improved by having better subcontracting and a better process on figuring out who to actually hire for the subcontractors. Patrick and Ivan went above and beyond trying to resolve the issues my wife and I had with the subcontractors.
Nearby service areas in Whatcom County
Interlock® metal roofing is also installed in these communities near Sumas:
Interlock Metal Roofing (PNW) Inc. also services nearby States
Beyond Sumas, our team installs Interlock® metal roofing across:
