Metal Roofing in Bellingham, Washington — Lifetime Interlock® Aluminum Shingles Installed Locally
Bellingham Metal Roofing Experts Installing Lifetime Interlock® Aluminum Shingles Since 1997
Metal Roofing Built for Bellingham's Heavy Rain, Snow Loads, Windstorms & Lifetime Protection
Interlock Metal Roofing (PNW) Inc. is Bellingham, 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. Our heavy-gauge, fire-resistant roofs are engineered to withstand Bellingham’s frequent rain, coastal winds, and winter snow loads, providing superior snow shedding and long-term protection. With energy-efficient cool roof technology, our systems help reduce energy costs year-round. Choose from slate, cedar shingles, shake, Mediterranean tile, or standing seam profiles—all protected by the advanced Alunar® Coating System and backed by a Lifetime Warranty. For roof replacement or re-roofing in Bellingham, trust Interlock Metal Roofing (PNW) Inc. for a roof that’s as resilient as it is beautiful.
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
Impact Resistant
UL 2218 Class 4 — top hail rating
Corrosion Resistant
Aluminum won’t rust or corrode
- Interlock Lifetime Aluminum Roofing System tailored for Bellingham homeowners seeking durable coastal performance
- Aluminum panels coated with the Alunar® Coating System (no visible aluminum surface) for long-term color stability and corrosion resistance
- 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 120+ mph (193+ km/h) to withstand severe coastal windstorms and gusts along Bellingham’s shoreline
- Corrosion-resistant construction designed specifically to resist salt air and marine exposure on Bellingham and Whatcom County waterfront properties
- Advanced waterproof installation and interlocking panels minimize leak risk during atmospheric-river deluges that impact the Bellingham region
- Snow-shedding panel geometry reduces accumulation and helps prevent ice dams during occasional snow loads and freeze–thaw cycles in Whatcom County
- Designed to manage persistent coastal moisture and cool, damp roof conditions common to Bellingham’s maritime climate
- Moss- and algae-resistant surface treatment helps limit biological growth on roofs exposed to Bellingham’s humid coastal environment
- UL 2218 Class 4 impact resistance provides protection from hail, falling branches, and storm debris associated with Pacific Northwest windstorms
- Class A fire-rated available to enhance ember resistance and roof performance for properties near wildfire-prone areas of Whatcom County
- Energy-efficient cool-roof performance reduces attic heat gain during occasional Pacific Northwest heat waves and improves home comfort in Bellingham
- Solar-compatible roof platform engineered for modern bracket-mounted photovoltaic systems on Bellingham residences
- Fully recyclable aluminum construction supports sustainable building goals for homeowners across Bellingham and Whatcom County
- Low-maintenance finish and panel design reduce routine upkeep compared with asphalt shingles in Bellingham’s high-moisture environment
- Backed by a lifetime-limited transferable warranty to protect long-term value for Bellingham properties
Interlock Metal Roofing (PNW) Inc.
- 5608 17th Ave NW suite 1574, Seattle, WA 98107, United States
- Phone 206-589-8423
- Toll-Free 1-866-733-5811
- [email protected]
- www.WashingtonMetalRoofing.com
- License INTERMR75406
- 28 Years in Business
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.
Get a Free Metal Roof Estimate in Bellingham, Washington
Interlock® Aluminum Roofing — all-climates performance specs for Bellingham, 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 Bellingham, Washington:
Explore all Interlock® metal roofing systems, or see the Guardian lifetime warranty and independent testing reports.
Recent Interlock® roofs in Bellingham, WA
What our customers are saying:
Over all a good experience, but it's hard to recommend something after such a short time and people's needs are different. See above comments I think it's hard to evaluate a new roof with a lifetime warranty after a very short time and very little rain, but so far we're very happy.
Overall I didn’t have the greatest experience but that was primarily from the contracted installation crew and their lack of follow through with doing the roof right the first time. Otherwise I’m happy with the way the roof looks and the quality. And despite having to have part of it redone I appreciated the interlock rep going up in my attic and making the crew redo it correctly so I had a quality job. His honesty about the situation went a long way. I would have liked to choose when they were coming. When you’re paying upwards of 50k for a roof I would think you could have some say.
They can improve with a better communication between the installation crew and the client. If there was an Interlock member with the crew as a translator, that could have helped. The installation crew need more tarps and a magnet to pick up the remaining debris of nails. There was asphalt dust all over the yard. I believe it will be a good roof.
Just a few days ago my husband and I were excited to see our new Interlock aluminum roof completed in the gorgeous eye popping finish of copper penny shake topping our newly purchased log home in Bellingham WA. We are so thankful for the signage that the company uses when completing new roofs because when we were first looking at our home and considering a purchase we happened to drive by a house just down the road that had the same " title="copper" data-wpil-keyword-link="linked">copper finish aluminum Interlock roof that we eventually decided on. Seeing this roof installed on another house was the impetus that we needed to call the company and begin our inquiry well before we even purchased our home. We did our homework and considered other roofing materials and companies, but Interlock stood out in our minds as our top choice. The Interlock salesmen, Ross and Paul also went out of their way to come and look at the home and the roofing and bring samples to put on the roof for us to see during our inspection period. They also met with us immediately after closing on a Sunday as we wanted to lock in on a date for installation as soon as we could. We have a very large square footage of roofing, as well as a roof line that is very prominent on the house and we wanted to do something to enhance the stately character for what is definitely a very magical house and property. We have only now owned our house for less than two months, and already have our beautiful new roof completely installed. As we closed on our house in mid-October and we live in the Pacific NW near the Canadian border, this is already a feat. The team of roofers who were sent by Interlock to do our installation were some of the hardest working, most focused, and skilled labor crew we have had the pleasure of coming across. They completed the job in 2.5 weeks, working weekdays and Saturdays, arriving at 7:30 AM and working until 6 PM into the darkness with headlamps on. They worked in rain, cold, and very windy conditions, removing 90,000 lbs. of clay " data-wpil-keyword-link="linked">tile roofing and replacing it with the Interlock 100 year warrantied high quality roofing. The team was extremely respectful, also replacing a skylight that we added to the job mid-way and reinforcing roofing around other skylights that appeared to be leaking. All members of the Interlock company that we have spoken with or had contact with otherwise have been friendly and personable, respectful, and quickly and effectively addressed any questions or issues that we have brought to their attention. We feel safe and secure under our beautiful and functional Interlock roof that is quiet when it rains and lets the water run off in rivulets into the eaves. We thank everyone at Interlock and hope to have a long and successful relationship with Interlock and our new roof.
Correcting the one error quickly. i would like to suggest they look into a better way to do the nailing. The nails are popping through under our roof and it doesn't look very nice. Otherwise we love our roof.
Paul is a great guy. The biggest disappointment is that we couldn't go with Paul.
Not for existing properties. If new construction yes. I have several siblings living in this town in over million dollar homes and they have heard my frustrations. First change the wording in your acceptance letter from available 24-7 availability to Monday through Friday time zone available.Making sure someone has on-call contact for emergencies (leaking roof).Being able to return calls, scheduled dates. Initial sales pitch should match what is on line with regards to the actual warranty-false sales pitch really is a sticker to us. The crew really should take consideration of laying the tarps (I saw but never used)-could prevent leaking roof. Also I have a cover on my garage that would be very expensive to replace had their metal pieces hit it is such a way as to put tears in it. I noted several things fall from roof onto this covering.
Communication, follow up, status checks, etc. I received a confirmation of final payment about a month later and still have not received warranty documents. ( as of March 1st) Final check written on January 22. Job finished on Jan 16.We also could have benefitted from better information and consultation/education on snow guards. In February we received a lot of snow. The snow sliding off our roof on the north side and dropping onto a second story deck has really caused us some concern. It was 22" deep and had t be shoveled off. I am not sure about what to do in the future and if this is a hazard or if damage will occur to the deck structure. During the initial presentation / ordering Paul asked if we wanted snow guards, but no advice or more in-depth consideration was given pertaining to the design of our residence. We do not get a lot of snow each year, but it should be considered more carefully. We also did not care for the "buy it right now to get the best price" approach. You should drop this high pressure sales technique and your company would benefit - it can cause some trust issues with customers. Hoping to hear back about what we might consider regarding snow issues.
My only suggestion would be to recycle the cardboard packing if possible.
I had a hard time remembering their name. I love my new roof.
See above. Thank you to everyone who helped us throughout this process!
Nearby service areas in Whatcom County
Interlock® metal roofing is also installed in these communities near Bellingham:
Interlock Metal Roofing (PNW) Inc. also services nearby States
Beyond Bellingham, our team installs Interlock® metal roofing across:
Metal Roofing FAQs for Homeowners in Bellingham
The following metal roofing FAQs are designed specifically for homeowners in Bellingham, Washington. Whether you are building a new home or replacing an existing roof, understanding how roofing materials perform in local weather conditions is essential. From wind and storm protection to fire resistance, hail impact, snow loads, and coastal moisture exposure, Interlock’s Lifetime Aluminum Roofing System is engineered to provide long-term durability, energy efficiency, and peace of mind in Bellingham.
Will a metal roof rust in Bellingham's wet climate?
No—aluminum cannot rust because it contains no iron. Instead, it forms a self-healing oxide layer that automatically repairs itself when scratched, making it ideally suited to Bellingham's 1,196 mm of annual rainfall. Steel roofs can rust; Interlock uses roofing-grade 3105-H24 and 3003-H24 aluminum alloy (ASTM B209) with a Alunar 70% PVDF fluorocarbon coating applied to both sides for extra protection. This dual-sided coating is warranted 30 years against chalking and fading, giving you decades of corrosion-free performance in coastal and wet inland conditions.
How does a metal roof handle snow and ice in Bellingham winters?
Bellingham receives about 35 cm of snow annually and experiences roughly 34 freeze-thaw cycles each year—conditions where ice dams and snow creep are real concerns. Interlock's four-way interlocking aluminum panels lock together to prevent water infiltration even when snow melts and refreezes. The lightweight design—the Shake profile weighs just 0.58 lb/sq ft—means no structural reinforcement is needed, and snow doesn't accumulate as weight the way it does on asphalt. Optional snow guards can be added if you want to control slide-off. Installation over your existing roof is possible, reducing tear-off costs and waste.
Can a metal roof withstand Bellingham's winter wind gusts?
Yes. Bellingham's typical gusts reach 117 km/h, and Interlock panels are warranted to resist wind speeds up to 120 mph (193 km/h) when installed to specification. The four-way interlocking design locks each panel to its neighbors, distributing wind load across the entire roof rather than relying on fasteners alone. This engineering, combined with the ICC-ES evaluation report ESR-1790 (reissued 2025 for IBC/IRC compliance), means your roof meets or exceeds local building codes. Installers in the region have been securing these roofs since 1997 in exactly these wind conditions.
With so much rain in Bellingham, how do metal roofs prevent leaks?
Bellingham averages 1,196 mm of rain per year, so leak protection is non-negotiable. Interlock's four-way interlocking aluminum panels create a mechanical seal between adjacent sheets—water cannot flow vertically into seams the way it can with asphalt shingles or standing-seam panels with exposed fasteners. The panels are installed over solid decking or your existing roof with underlayment, and the overlapping design sheds water downward by gravity. Combined with proper flashing at penetrations and valleys, this system has been installed on homes and research stations worldwide without the leak callbacks that plague asphalt roofs in heavy-rainfall climates.
Is a metal roof noisy when it rains?
No. The rumor persists, but Interlock metal roofs are installed over a solid deck and underlayment—the same way asphalt shingles sit—so rain sounds no louder than on conventional roofing. The mass of the deck and the acoustical properties of the underlayment absorb impact noise. Bellingham's frequent rainfall (over 3,000 hours of rain annually) means you'll hear your roof in any material; aluminum over solid framing sounds like asphalt, not like rain on a metal barn. If you've heard a loud metal roof, it was likely installed over open purlins or a sparse structure, which is not how residential roofs are built.
Do I need to reinforce my house to support a metal roof?
Almost never. Interlock's Tile profile installs at just 0.59 lb/sq ft—about 96% lighter than concrete or clay tile—so no structural reinforcement is required on most homes. Compare that to asphalt shingles, which weigh more per layer when you factor in felt and ice-and-water shield over multiple decades. Since Interlock installs directly over your existing roof in most cases, there's no tear-off cost, no structural engineer fees, and your home's framing bears the same or less load than before. Bellingham receives about 35 cm of snow yearly; lightweight aluminum sheds that load far better than heavy tile or slate ever could.
What hail protection does a metal roof offer in Bellingham?
Interlock metal roofing carries a UL 2218 Class 4 impact rating—the highest classification available—and the Guardian warranty even covers perforation from hailstones up to 1.5 inches. While Bellingham's hail risk is lower than inland eastern Washington, severe spring storms do occur, and Class 4 impact resistance is the gold standard. This rating often qualifies homeowners for insurance discounts because the roof is less likely to need claims. The aluminum's ability to dent without cracking or losing structural integrity—combined with the 30-year coating warranty—means your roof protects your home through weather events that would compromise asphalt.
Will a metal roof reduce cooling costs in Bellingham's climate?
Bellingham's average temperature is only 10.3°C, so traditional air conditioning isn't a major expense. However, energy-efficient Interlock colors with thermal emissivity of 0.84 and solar reflectance up to 0.55 (Aged Copper Penny) reflect heat rather than absorb it, which matters during the roughly 3,005 annual sunshine hours when the sun does appear. Even in a temperate climate, a cooler attic means your HVAC system runs less, reducing heating load in winter when that reflects back inward, and keeping you comfortable during spring and fall warm snaps. The Cool Roof Rating Council rating proves this isn't marketing—it's measured thermal performance.
Is a metal roof worth the upfront cost compared to asphalt?
Yes, when you calculate the total cost of ownership over the life of your home. Asphalt shingles last 15–20 years and require tear-off and replacement twice or three times in 50 years, sending waste to landfills and costing thousands in labor each cycle. Interlock comes with a lifetime limited material warranty for the original owner—non-prorated—that covers rusting, rotting, splitting, cracking, and curling. The next owner receives 50 years of coverage, making it transferable once. Current regional promotion offers no payments and no interest until Spring 2027, or 10% off installation. Calculate: one metal roof versus two or three asphalt replacements, plus the resale premium, and aluminum typically wins on economics by year 25–30.
Who installs Interlock Metal Roofing in Bellingham?
Interlock Metal Roofing (PNW) Inc. serves Bellingham and Whatcom County. The installer has been in the region since 1997 and understands local building codes (ICC-ES ESR-1790, reissued 2025), Bellingham's wet climate with 1,196 mm annual rainfall and 34 freeze-thaw cycles, and the structural requirements of homes here. They're familiar with installing over existing roofs to minimize waste and cost, and they can walk you through the current financing offer: no payments and no interest until Spring 2027, or 10% off installation. Local service means someone who knows your climate, your building department, and your neighborhood is accountable for the work.
