Metal Roofing in Bear Creek, Washington — Lifetime Interlock® Aluminum Shingles Installed Locally
Bear Creek Metal Roofing Experts Installing Lifetime Interlock® Aluminum Shingles Since 1997
Metal Roofing Built for Bear Creek's Heavy Rain, Snow Loads, Windstorms & Lifetime Protection
Interlock Metal Roofing (PNW) Inc. is Bear Creek, 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 Bear Creek’s wet winters, heavy snowfall, and seasonal storms, ensuring superior snow shedding and long-term protection. With energy-efficient cool roof technology, our systems help reduce energy costs year-round. Choose from the timeless elegance of slate, cedar shingles, shake, Mediterranean tile, or standing seam — all with the strength of metal and the advanced Alunar® Coating System for maximum weather resistance. Every Interlock roof is backed by a Lifetime Warranty, making us the top choice for roof replacement and re-roofing in Bear Creek, Washington.

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 ~1761 mm of rain a year
Energy Efficient
Reflective cool-roof lowers cooling costs
Snow-Shedding
Built for ~194 cm of snow a year
Freeze–Thaw Durable
Endures ~58 freeze–thaw days a year
- Authorized Interlock® installer serving Bear Creek and Lewis County, with local experience installing to regional 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
- Tested to 193+ km/h (120+ mph) to resist severe windstorms that can impact Bear Creek and surrounding Lewis County lowlands
- Advanced waterproof installation details minimize leak risk through Bear Creek’s prolonged wet seasons and wind-driven rain
- Snow-shedding panel geometry reduces buildup and helps prevent ice dams under the snow loads and freeze–thaw cycles encountered in inland Lewis County
- Class A fire-rated available to improve ember resistance and roof performance during dry-season wildfire risk in parts of Lewis County
- UL 2218 Class 4 impact resistance for protection against hail, falling branches, and storm debris common after wind events
- Energy-efficient cool-roof performance to limit heat gain during occasional summer heat waves and improve attic comfort in Bear Creek homes
- Solar-compatible system engineered for modern bracket-mounted photovoltaic installations without compromising roof integrity
- Sustainable, fully recyclable aluminum roofing that reduces replacement waste compared with asphalt shingles
- Profiles replicate slate, cedar shake, and tile for architectural appeal while providing the durability Bear Creek homeowners require
- Smooth coated finishes and steep-shedding profiles inhibit moss and lichen growth common in Bear Creek’s damp microclimates
- Designed to handle atmospheric-river events—prolonged, high-intensity rainfall that affects inland Lewis County watersheds and Bear Creek drainage areas
- Coated aluminum resists corrosion from occasional marine salt air that can reach lowland Bear Creek during strong onshore storms
- The aluminum is Coated with the Alunar® Coating System (no visible aluminum surface)
Metal roofing built for Bear Creek's climate
Averages (10-yr): ~1761 mm rain and 194 cm snow per year, ~2743 sunshine hours, mean 9.8°C, typical daily-max winds ~11 km/h with gusts to 128 km/h, and ~58 freeze–thaw days per year.
- 194 cmavg. snow / year
- 1761 mmavg. rain / year
- 58freeze–thaw days / year
- 128 km/hpeak wind gusts
- 2743 hrsannual sunshine
- 9.8°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 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 Bear Creek, Washington
Interlock® Aluminum Roofing — all-climates performance specs for Bear Creek, 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 Bear Creek, 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 Bear Creek, WA
Every marker is a real, anonymized Interlock® aluminum roof completed by a Certified Interlock Installer. Explore verified Interlock® installations near Bear Creek, 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 Bear Creek on the interactive project map →Browse all Interlock® projects in Washington →See more Interlock® projects →
What our customers are saying:
It's been about 6 weeks since our new roof was completed, and we are thrilled with the result. The whole process from start to finish was seamless and very efficient. As a salesperson myself, I was impressed with the 'no pressure' approach to selling us the roof and the information that was provided to us to make an informed decision on the type of roof for our home. We chose the black slate and it looks very smart and has transformed the look of our home considerably. Since the roof was installed, we have had the usual mixed bag of Washington weather - heavy rain, hail, strong winds, and frost. Our roof has been put to the test and passed with flying colors. Frank observed the installation process and was impressed with the seamless flashing, custom-made on site, and state of the art vent coverings. Our roof looks beautiful and stands out from the others in our neighborhood. We were particularly impressed with the workmanship of Victor and Mark Lomakin, the two men who installed the roof. They were punctual, fast, courteous, respectful, efficient and very professional. Our neighbors also commented on how well they worked. When the roof was complete, they cleared away all debris and even removed the unwanted satellite dish from our roof. It couldn't have gone better. We received all the financial documentation in a timely manner and all of the employees we have dealt with have been very knowledgeable and helpful. Our only criticism is that it would be nice to have an online payment facility for overpayments. Currently the only way to do that is to mail a payment to Canada but we don't have checks so we would have to purchase money orders and mail them as we intend to make over-payments along the way. We would happily recommend Interlock to anyone looking for a new roof. Kind regards Jennifer and Frank Herboldsheimer Ocean Shores, WA
Of the five name brand roofing contractors I screened for this project I chose Interlock and I am very pleased with the roof. Coordination and communication was critical especially since Interlock was to perform the installation immediately following another contractor performing a siding replacement. Communication with the interlock team was great and they remained flexible. Interlock was able to adjust their installation timeline as issues popped up with the siding project. Interlock promptly scheduled and dispatched materials and crew as soon as the siding contractor cleared out. I was a bit concerned about introducing a ">metal roof to the neighborhood, but could not be happier with the end result. In an effort to help tie everything together I had the siding contractor match the fascia wrap and gutters to the interlock ">roof black slate finish. The installation team was courteous, professional, and they notified me of any issues they ran across with the structure during the tear-off phase. Clean-up performed by the installation team was better than that performed by other contractors that had worked at the site. Great attention to detail and they took extra measures to protect sensitive areas around the house. I am currently working with their finance department as I Refinance the house and they are by far the friendliest finance team I have ever worked with. Great communication and customer care standards! The roof looks amazing and definitely grabs the attention of people driving by. The most amusing reaction so far was while I was watering the plants in the front yard a vehicle drove by, stopped abruptly, turned around, and pulled up into the driveway. A salesman in corporate attire for another roofing company stepped out of the vehicle and started asking questions about the roof. I was very familiar with the brand he represented because their product is rated among the best asphalt roofing products in the country. I thought that was quite amusing because here I am giving him contact information for a competitor . He was interested in something similar for his home so we talked for a bit about the Interlock Roof and he was very impressed. Reminded me of those old Coke versus Pepsi commercials.
Thanks for a very positive roofing experience! Our new roof is so beautiful we’re thinking of charging a fee to all the gawking neighbors that stop by to admire it!!! This was fun, positive experience from start to finish. Our sales rep spent three hours at our home going over every possible detail with us. He was knowledgeable, friendly and answered all our questions. As you can see by the pictures we have a pretty basic roof. There was no tear off to do; still, our three installers were 80% done on the very first day! Everything was done and cleaned up to our satisfaction by the end of day two. Our installers were friendly, courteous and hard working. I watched them for a few minutes as they all worked like a finely tuned machine installing our roof in perfect rhythm. For us, Interlock meant that the third time was the charm. We’d tried to do business with two other companies. The first took a large amount of money as a down payment and gave absolutely no customer service for two months. We got our money back and started over. The second company gave an inaccurate bid. Needless to say, we entered into this contract with some trepidation. interlock is a fabulous company and we’d recommend them to anyone in the market for a new roof!
We are writing this letter to show our appreciation for the wonderful job that was done on our roof. From the date your company representative met with us in our home to the date of completion, words cannot express how completely satisfied we are with your company. We definitely wanted a quality roof and were very impressed by the representation that was given to us. The product you provide was enough for us to make our decision, however it was a huge plus not to have to deal with a pushy salesman and to have such polite, friendly and hard working men providing the service. It was a pleasure to have them around our home. The quality, craftsmanship and lifetime warranty of this ">roof far outweighs the increased costs over other roof systems. However, other roof systems don't come with lifetime warranties and many only last for 8 to 10 years. We may have paid a little more initially, but how wonderful it is to know we will never have to re-roof our home again. And in addition to all of the above, it looks so beautiful and has added so much style to our home. I never dreamed a roof could make such a difference. Again, Thank you so much and be sure to know we will highly recommend your company to all of our family and friends.
I am very pleased with the entire experience with Interlock Roofing. Ross did a fantastic job of showing me all of the options available, and explaining how Interlock is different from other roofing. This was not a hard sales pitch. I was pleasantly surprised by how affordable a metal roof was. I had five other estimates for a traditional composite roof, and the price difference for a forever roof was negligible considering all the benefits. Next, the installation. These guys were amazing! Only two guys doing the demo and reroof, but very hard workers and did a fantastic job. It seems rare these days to find skilled tradesmen that take pride in their work, and these guys exceeded my expectations. I also took advantage of Interlock’s financing. Drew was very helpful and accommodating. The whole process was taken care of through Interlock, making it super convenient and great communication throughout. I will highly recommend:)
I installed a new metal interlock roof on my home in Anacortes. A big part of the cost was removing the existing concrete tiles from my roof which are a challenge. From the beginning working with sales, Paul and Ross was a pleasure...very responsive and professional. The installion crew and project managers, Tony and Patrick were terrific to work with. There were a few complications due to the existing roof but the Interlock team worked with me to resolve those issues. The crew were punctual and the installation proceeded on schedule. The cleanup was immaculate. My main goal was NOT to see any further leaking in my lifetime and hopefully that will be achieved. The roof looks great. If you are in the market for a metal roof, I would certainly recommend Interlock.
Positive: Professionalism, Punctuality, Quality, Responsiveness, Value Thank you Interlock for our beautiful new roof! Installation was great from start to finish. We have lots of neighbors walking by and saying “wow” and that it doesn’t look like a metal roof. We are so happy to have our “forever” roof and to never have to re-roof again! 😀 Only wish we had done it SOONER! ">" alt="After\_WAEV21051\_Woodinville-WA-98077\_Interlock-Metal-Roofing\_Deep-Charcoal-Aluminum-Roof-Shingles-Solar-Crystalline-Panels-2" width="300" height="225" /> ">" alt="After\_WAEV21051\_Woodinville-WA-98077\_Interlock-Metal-Roofing\_Deep-Charcoal-Aluminum-Roof-Shingles-Solar-Crystalline-Panels-1" width="300" height="225" />
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.
We are very pleased with our new roof installed by Interlock Metal Roofing. The house looks beautiful, more than I imagined. You Paul Wright, as our salesman, are appreciated for all the information about the product and the no pressure approach you do. The installers were wonderful. They were great to work with—cleaned the area around the house each night. Our house was three days from start to finish …amazing to watch. We couldn’t be happier with the service and the product.
To Whom It May Concern: It is our pleasure to highly recommend Ross and Interlock Roofing for your next roofing project. Our roof was installed in August of 2017 it’s amazing the performance it provides to our home. The temperature indoors during the summer is cooler allowing energy savings, our Shake profile stands out with lasting beauty and durability. The installation crew is as great as the product they are polite and professional and went above our expectations they answered all our questions with no concerns. Our investment to have Interlock roof on our home gives us Peace of mind knowing for years to come we will never have to worry about our roof again. We would not hesitate to recommend Interlock Roofs and their awesome products to anyone looking for a new roof.
We just wanted to let you know how thoroughly-pleased we are with our new Interlock Roof. It is absolutely beautiful and we have had a lot of people stopping as they walk or drive by to admire how nice it looks. Everything progressed on the job exactly as you had shared with us when we signed the contract. There were no surprises. From the beginning when we got the call to set up a start date, to the final clean up and retrieval of the waste bin everything was handled so professionally. Viktor and Alex were a dream to work with-so-pleasant and each day everything was left so tidy that it would have been hard for guests to tell that we were in the middle of a re-roofing job. We will highly recommend your product and doing business with such a professional and obviously well run company.
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!
Nearby service areas in Lewis County
Interlock® metal roofing is also installed in these communities near Bear Creek:
Interlock Metal Roofing (PNW) Inc. also services nearby States
Beyond Bear Creek, our team installs Interlock® metal roofing across:
Metal Roofing FAQs for Homeowners in Bear Creek
The following metal roofing FAQs are designed specifically for homeowners in Bear Creek, 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 Bear Creek.
How does a metal roof handle Bear Creek's heavy snow and freeze-thaw cycles?
Interlock's four-way interlocking aluminum panels shed snow and ice far more effectively than asphalt, and the smooth surface resists ice dam formation in your region's typical 58 freeze-thaw days per year. Aluminum's thermal conductivity means heat from your home melts snow at the roof-deck interface without pooling. Optional snow guards can be installed to control where snow slides. The lightweight design—Shake profile at 0.58 lb/sq ft—means no structural reinforcement is needed even with about 120 cm of annual snowfall, and the panels won't degrade from repeated freeze-thaw stress the way asphalt, wood, and concrete tile do over decades.
Why won't my aluminum metal roof rust in Washington's wet climate?
Aluminum cannot rust because it contains no iron; instead it develops a self-healing transparent oxide layer that re-forms when scratched. Even in Bear Creek's 1761 mm of annual rainfall, that oxide barrier protects the core metal indefinitely. Interlock uses roofing-grade 3105-H24 aluminum (ASTM B209) and applies Alunar 70% PVDF fluorocarbon coating to both panel sides for extra durability in moisture-rich environments. Steel roofing, by contrast, oxidizes from the inside out once its paint fails. You'll never replace your roof due to rust, and the 30-year coating warranty against fading reflects real-world performance in climates far saltier and wetter than Lewis County.
Does metal roofing crack and degrade faster than asphalt in freeze-thaw climates?
No—the opposite occurs. Aluminum expands and contracts smoothly without cracking because it's homogeneous and ductile; asphalt becomes brittle as it ages, then cracks and curls precisely when your area experiences about 58 freeze-thaw cycles annually. Wood shakes split and rot; concrete and clay tile fracture in the freeze-thaw cycle. Interlock aluminum panels are engineered for temperature swings from coastal salt-air homes to an Antarctic research station. The interlocking seams accommodate movement without stress concentration, and the substrate won't absorb moisture and expand the way mineral-based materials do. After two or three asphalt replacement cycles, your metal roof will still be watertight and impact-rated (UL 2218 Class 4) with its original structural integrity intact.
How does a metal roof keep water out during heavy rainfall in Bear Creek?
Interlock's four-way interlocking design creates a mechanical lock that sheds water downslope; rain cannot migrate uphill against the interlocked seams. The profile geometry and standing-seam variants direct the 1761 mm of annual rainfall efficiently toward gutters without pooling. When installed to specification over solid decking with underlayment, the system stops water in the air before it reaches the deck. Loose fasteners or poor installation are the only common leak vectors—and Interlock (PNW) Inc., your regional installer since 1997, knows Lewis County's roof angles and wind loading patterns. The ICC-ES evaluation (ESR-1790) confirms water-shedding performance under IBC/IRC standards, and the non-prorated lifetime limited warranty covers any perforation or corrosion-related leaks for the original owner.
Will a metal roof hold up in Bear Creek's winter wind gusts?
Yes. Interlock aluminum roofs are warranted to resist sustained winds of 120 mph when installed per specification, and they handle your region's typical gusts of 128 km/h (80 mph) with margin. The four-way interlocking panels lock together mechanically—each panel hooks into its neighbors on all four sides—so wind cannot peel a single panel free. This differs sharply from shingle roofs, where wind peeling begins at edges and accelerates. Interlock's lightweight construction (Slate at 0.41 lb/sq ft) reduces uplift force, and the design has been tested in real gale conditions from coastal British Columbia storms to Antarctic katabatic winds. No special bracing is required for standard Lewis County installations, and the wind warranty is part of the Guardian coverage.
Does hail damage in Washington affect metal roof insurance or claims?
Interlock metal roofs carry a UL 2218 Class 4 impact rating—the highest available—and the warranty specifically covers perforation from hailstones up to 1.5 inches. This rating means insurance companies often offer lower premiums or reduced deductibles compared to asphalt, which fails catastrophically in hail. Bear Creek receives about 2743 sunshine hours annually, so dramatic hail events are not your primary weather pattern, but when they do occur, metal's non-denting performance and impact coverage provide peace of mind. Ask your insurer about discounts for Class 4 roof installation; many carriers credit the durability and longevity into your rate. Your installer, Interlock (PNW) Inc., can document the rating for your policy file.
Can I install a metal roof over my existing roof without reinforcing the structure?
Yes, for most homes. Interlock's extraordinarily light weight—the Mediterranean Tile profile is about 96% lighter than concrete or clay tile—means no structural reinforcement is needed. Even the heaviest profile (Tile at 0.59 lb/sq ft) weighs far less than the asphalt shingles, wet felting, ice, and 120 cm of occasional snow your roof already supports. You can install Interlock directly over your existing roof in most cases, eliminating tear-off labor and landfill waste. A structural engineer or your local installer can verify your specific framing, but in typical Lewis County residential construction, the lightweight design means lower labor costs and faster installation. The ICC-ES evaluation ESR-1790 confirms the approach meets building code, and you keep your old insulation in place.
What maintenance does a metal roof need compared to asphalt or wood?
Almost none. Metal requires no algae treatment, no granule replacement, no sealing, and no moss scraping—chores asphalt and wood demand every few years in Bear Creek's 1761 mm of annual rainfall and 194 cm of snow. Gutters still need cleaning (leaves, not asphalt granules), and you may rinse bird droppings, but the roof surface itself is inert and maintenance-free. CALGreen verification confirms reduced-maintenance performance. Asphalt becomes brittle after 15–20 years and leaks escalate; wood rots; concrete tile cracks. Interlock's aluminum oxide coating and PVDF finish remain stable across the 58 annual freeze-thaw cycles your region experiences. The Guardian warranty does not require annual inspections or professional maintenance to remain valid, and the coating is warranted 30 years against chalking and fading (ASTM D4214 / D2244).
What warranty comes with an Interlock metal roof, and how long will it actually last?
The Guardian warranty is non-prorated lifetime limited for the original owner—covering rusting, rotting, splitting, cracking, curling, and loss of impact resistance with no declining benefit over time. If you sell your home, the warranty transfers once to the next owner for 50 years from completion. Real-world durability is equally compelling: Interlock has been manufactured since 1998 in Delta, BC, and installed from coastal salt-air homes to an Antarctic research station, proving 25+ years of in-service performance across extreme climates. Your roof will outlast three or four asphalt cycles. The coating is separately warranted 30 years against fading and chalking, and the hail warranty covers perforation from 1.5-inch hailstones. Combined with the lightweight design's structural longevity, Interlock is the last roof most homeowners install.
What metal roof profiles does Interlock offer, and how do they look?
Interlock offers five profiles: Slate (subtle, linear texture), Cedar Shingle (overlapping shingle pattern), Shake (wider, rougher shake appearance), Mediterranean Tile (high-profile barrel tile geometry), and Standing Seam (clean, modern vertical ribs). Each replicates the traditional material's visual profile in lightweight aluminum—Shake at 0.58 lb/sq ft versus heavy cedar requiring structural reinforcement, or Tile at 0.59 lb/sq ft versus concrete tile requiring roofing upgrades. All profiles feature four-way interlocking seams, the same durability, and the same Alunar 70% PVDF coating finish. Available in multiple colors and finishes, each profile performs identically in wind (120 mph warranty), hail (UL 2218 Class 4), and your region's heavy rainfall and freeze-thaw cycles. Your local installer, Interlock (PNW) Inc., can show samples and discuss which profile matches your home's architecture and your neighborhood's character.
Is a metal roof a good choice for Bear Creek’s climate?
Yes. Bear Creek averages about 194 cm of snow, 1761 mm of rain, roughly 58 freeze–thaw days a year, with peak wind gusts near 128 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.













