Metal Roofing in Glacier, Washington — Lifetime Interlock® Aluminum Shingles Installed Locally
Glacier Metal Roofing Experts Installing Lifetime Interlock® Aluminum Shingles Since 1997
Metal Roofing Built for Glacier's Heavy Rain, Snow Loads, Windstorms & Lifetime Protection
Interlock Metal Roofing (PNW) Inc. is Glacier, 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 unique Pacific Northwest climate. Glacier’s heavy snowfall, rain, and seasonal temperature swings demand a roof engineered for superior snow shedding, fire resistance, and energy efficiency—qualities that define the Interlock Lifetime Roofing System. Our heavy-gauge, cool roof solutions are designed to withstand harsh weather, prevent ice damming, and reduce energy costs year-round. Choose from slate, cedar shingles, shake, Mediterranean tile, or standing seam profiles for a timeless look with the proven strength of metal. Every roof is protected by the advanced Alunar® Coating System and backed by a Lifetime Warranty, ensuring Glacier homeowners enjoy long-term protection and peace of mind.
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 ~1489 mm of rain a year
Impact Resistant
UL 2218 Class 4 — top hail rating
Freeze–Thaw Durable
Endures ~50 freeze–thaw days a year
- Coated with the Alunar® Coating System (no visible aluminum surface) to maintain finish and corrosion resistance on Glacier rooftops
- 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 to resist severe windstorms affecting Glacier and nearby ridgelines in Whatcom County
- Snow-shedding metal panels reduce heavy buildup and help prevent ice dams under Glacier’s seasonal snow loads and frequent freeze–thaw cycles
- Designed to tolerate rapid seasonal transitions—sustained performance through Glacier’s wet winters, spring melt and freeze–thaw cycling
- Class A fire-rated available for properties near forested slopes and wildland-urban interface areas of Whatcom County
- UL 2218 Class 4 impact resistance for protection against hail, falling branches, and debris during mountain storm events around Glacier
- Energy-efficient cool-roof performance to reduce heat gain during summer warm spells and improve attic comfort in Glacier homes
- Solar-compatible roofing engineered for modern bracket-mounted photovoltaic systems common on Whatcom County residences
- Sustainable, fully recyclable aluminum minimizes lifecycle waste and supports long-term durability expectations for Glacier homeowners
- Low-maintenance finish and durable profiles designed to outlast asphalt shingles in Glacier’s high-moisture, mountainous environment
- Backed by a Lifetime-Limited transferable warranty to protect long-term value for Glacier properties
- Proven waterproofing and sealed details to help resist infiltration during atmospheric-river events that deliver intense, prolonged rainfall to the region
- Corrosion-resistant Alunar® finish also defends against occasional coastal salt-air exposure experienced in lower-lying areas of Whatcom County while providing durable performance for inland Glacier homes
- Smooth finish and steep-shedding profiles limit moss attachment and simplify cleaning on shaded, moisture-prone roofs around Glacier
Metal roofing built for Glacier's climate
Averages (10-yr): ~1489 mm rain and 90 cm snow per year, ~2778 sunshine hours, mean 10.5°C, typical daily-max winds ~11 km/h with gusts to 133 km/h, and ~50 freeze–thaw days per year.
- 90 cmavg. snow / year
- 1489 mmavg. rain / year
- 50freeze–thaw days / year
- 133 km/hpeak wind gusts
- 2778 hrsannual sunshine
- 10.5°Cmean temperature
Interlock® aluminum roofing is engineered for these conditions — wind-rated to 193+ km/h (120 mph), UL 2218 Class 4 impact-rated, Class A fire-rated, and built to shed snow and resist ice dams and freeze–thaw cracking, backed by a lifetime limited warranty.
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 [email protected]
- Toll-Free 1-866-733-5811
- Customer Service [email protected]
- 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 Glacier, Washington
Interlock® Aluminum Roofing — all-climates performance specs for Glacier, 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 Glacier, 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 Glacier, WA
Every marker is a real, anonymized Interlock® aluminum roof completed by a Certified Interlock Installer. Explore verified Interlock® installations near Glacier, 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 Glacier on the interactive project map →Browse all Interlock® projects in Washington →See more Interlock® projects →
What our customers are saying:
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.
I tried for several years to find a roof i would be happy with that would enhance the beauty of my property. I had been quite disappointed with the companies I was working with. When Interlock Roofing came along it was such a relief! Even though it did cost me more than other options, I feel like I received more value, especially long term, than any other offer I was considering. And I would not be as pleased with any other roofing system than I am with Interlock Roofing. Seriously, I can't think of a thing. I was surprised by everyone's attention to details. I was very pleased with the daily clean up of the job site. 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. People who see this roof compliment me on it. It will be spectacular once I finish the entire roof. The roof is stunning! There was no snow on the new roof when it stopped snowing last week; the snow simply slid off. It was incredible.
Weather in Northwestern Washington impacted the schedule by about 1 month, but that’s the weather we get
What a substantial difference the Interlock aluminum roof has made to the appearance of my hundred year old house. The haunted house look changed instantly into desirable real estate. The people who sold me the house have said they wish they had asked more for it now! My previous roofer, who I have used for many years on five different roofs with excellent results; drove by and said he knew it was a good job. He also wanted to recommend Interlock roofing to another customer who wanted something better than composition roofing. The service was great, the sheet metal engineers were industrious, exacting workers, and there have been no problems with anything. It looks so solid and neat; I cannot describe it exactly, but I will never be happy with composition roofing again. The leaves slide right off so it is always clean, and shows off the gables and fancy lines of the house so well... I love it!
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.
Nearby service areas in Whatcom County
Interlock® metal roofing is also installed in these communities near Glacier:
Interlock Metal Roofing (PNW) Inc. also services nearby States
Beyond Glacier, our team installs Interlock® metal roofing across:
Metal Roofing FAQs for Homeowners in Glacier
The following metal roofing FAQs are designed specifically for homeowners in Glacier, 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 Glacier.
How does a metal roof handle Glacier's heavy snow and ice buildup?
Metal roofs shed snow and ice more effectively than asphalt because the smooth, hard surface prevents moisture from bonding—especially important when you're getting about 90 cm of snow annually plus roughly 50 freeze-thaw cycles per year. Interlock's four-way interlocking panels are warranted to 120 mph wind loads, so they hold firm under the weight and stress of repeated freezing and thawing. You can add snow guards to control slide-off if you want, but the real advantage is that ice dams form less often on metal because heat loss through the roof is minimal compared to asphalt.
Will freeze-thaw cycles damage an aluminum metal roof?
No—aluminum actually improves under freeze-thaw stress because it has no iron content and cannot rust, which is what destroys steel roofs and fasteners in wet, cold climates. With about 50 freeze-thaw days per year in Whatcom County and around 1489 mm of annual rainfall, materials that absorb water (wood, asphalt) expand and crack repeatedly. Aluminum's oxide layer self-heals when scratched, and the Alunar 70% PVDF coating (warranted 30 years against chalking and fading) protects both sides of every panel, defending against salt spray and moisture cycling that would degrade lesser metals.
Can a metal roof rust in Glacier's wet climate?
You won't get rust on Interlock because aluminum contains no iron—the element that oxidizes into rust. In a climate with 1489 mm of rain per year and salt-carrying wind gusts to 133 km/h, steel roofing fails within years as iron oxidizes, but aluminum forms a protective oxide layer that heals itself when scratched. The Alunar fluorocarbon coating applied to both sides of the panel adds a second barrier, which is why Interlock roofs have been installed from coastal salt-air homes to an Antarctic research station since 1998 without corrosion failure.
How does a metal roof protect against Glacier's 1500 mm of annual rainfall?
The four-way interlocking panels create a tight mechanical seal between each section—water cannot penetrate the seams because the ribs lock vertically and horizontally, not just sideways. With about 1489 mm of rain per year (more than most U.S. cities), panel overlap and pitch handle volume that would saturate and delaminate asphalt shingles. Install a solid deck underneath with a quality underlayment, and you've got two layers of defense. Interlock's design means water moves downslope and off the roof; fasteners are mechanical rather than adhesive, so they don't weaken over decades of wet exposure.
Is a metal roof strong enough for Whatcom County wind gusts?
Absolutely—Interlock panels are warranted to resist 120 mph wind speeds when installed to specification, well above Glacier's typical wind gusts of about 11 km/h and extreme gusts recorded around 133 km/h. The four-way mechanical interlocking system locks each panel to its neighbors horizontally and vertically, distributing wind load across the entire roof assembly rather than relying on fasteners alone. Because the panels weigh only about 0.41–0.59 lb/sq ft (depending on profile), they flex slightly under pressure instead of cracking or tearing, then snap back to position once the gust passes.
What's the hail rating on Interlock metal roofing, and can it lower insurance costs?
Interlock carries a UL 2218 Class 4 impact rating—the highest available—and the Guardian warranty even covers perforation from hailstones up to 1.5 inches. Many insurers recognize Class 4 impact ratings and offer premium discounts or faster claims processing for metal roofing in hail-prone areas. That matters in Whatcom County where severe weather can develop quickly. Check with your specific insurer about discount eligibility, but the combination of non-combustible aluminum, Class 4 impact protection, and a lifetime limited warranty often improves your underwriting profile and can offset installation cost over the roof's life.
Do I need to reinforce my house structure for a metal roof?
No reinforcement needed. Interlock panels are extraordinarily light—the Mediterranean Tile profile, which replicates the weight of clay or concrete tile, installs at only about 0.59 lb/sq ft, making it roughly 96% lighter than the real thing. Most homes are framed to carry 20 lb/sq ft of snow load alone; a metal roof typically adds 1–2 lb/sq ft total. This matters if you're installing over an existing roof (no tear-off required, which saves labor and debris costs) or if your structure is older. Interlock's ICC-ES evaluation report ESR-1790 covers installation directly over existing asphalt, wood, or tile without structural modifications.
What does Interlock's lifetime warranty actually cover?
The Guardian warranty is a lifetime limited, non-prorated material warranty for the original owner—it covers rusting, rotting, splitting, cracking, curling, and loss of impact resistance at no charge for the life you own the home. When you sell, it's transferable: the next owner gets 50 years from completion date. That's unusual in roofing; most asphalt warranties are 20–30 years and prorated (you pay an increasing percentage as the roof ages). Combined with a 30-year coating warranty against chalking and fading, Interlock's coverage structure reflects confidence in durability across Glacier's harsh climate of rain, snow, freeze-thaw, and salt-air exposure.
How much maintenance does a metal roof need compared to asphalt or wood?
Metal requires almost none—no algae treatment, no moss removal, no shingle replacement, no sealant reapplication every 5–10 years. Asphalt degrades under Glacier's 2778 annual sunshine hours and requires frequent inspection; wood shakes split and rot under 50 freeze-thaw cycles per year and 1489 mm of rainfall. Interlock's non-porous aluminum surface sheds debris naturally and the Alunar coating protects against UV and moisture damage (30-year warranty). Periodic gutter cleaning and a visual inspection after severe weather is standard practice for any roof, but metal roofing eliminates the ongoing repairs and re-coating that keep asphalt and wood owners in a maintenance cycle.
Is a metal roof worth the upfront cost if I'm comparing it to asphalt?
Over a 50-year horizon, metal is typically less expensive. Asphalt averages 15–20 years in Pacific Northwest climates (freeze-thaw, rain, and UV shorten life); you're replacing it two to three times before metal needs attention. Labor to tear off, haul away, reinstall asphalt three times costs thousands more than one metal installation. Add that asphalt absorbs heat (higher summer cooling costs), while Interlock's energy-efficient colors reflect heat with up to 0.55 initial solar reflectance, lowering your air-conditioning demand. The Guardian lifetime warranty eliminates replacement cost risk for your ownership. Current promotion: no payments and no interest until Spring 2027 or 10% off installation.
Is a metal roof a good choice for Glacier’s climate?
Yes. Glacier averages about 90 cm of snow, 1489 mm of rain, roughly 50 freeze–thaw days a year, with peak wind gusts near 133 km/h. Interlock® aluminum roofing is wind-rated to 193+ km/h (120 mph), UL 2218 Class 4 impact-rated and Class A fire-rated, and its four-way interlocking panels shed snow and resist ice dams and freeze–thaw cracking — all backed by a lifetime limited, transferable warranty.
