Metal Roofing in Medina, Washington — Lifetime Interlock® Aluminum Shingles Installed Locally
Medina Metal Roofing Experts Installing Lifetime Interlock® Aluminum Shingles Since 1997
Metal Roofing Built for Medina's Heavy Rain, Snow Loads, Windstorms & Lifetime Protection
Interlock Metal Roofing (PNW) Inc. is Medina, 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 Medina’s unique Pacific Northwest climate. Our heavy-gauge, fire-resistant roofs are engineered to withstand Medina’s wet winters, frequent rain, and occasional snow, providing superior snow-shedding and long-term protection against moss, leaks, and wind. 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 energy efficiency and color retention. Every Interlock Lifetime Roofing System is backed by a Lifetime Warranty, making us the top choice for roof replacement and re-roofing in Medina, WA. Experience peace of mind and lasting curb appeal with Interlock Metal Roofing, your local experts in premium metal roofing solutions.
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® Lifetime Aluminum Roofing Systems available to Medina homeowners and contractors across King County.
- Aluminum panels are coated with the Alunar® Coating System (no visible aluminum surface) for long-lasting finish retention and corrosion protection.
- 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 geometry tested to 193+ km/h (120+ mph) for severe wind events.
- Exceptional corrosion resistance and finish integrity reduce lifecycle maintenance compared with organic roofing materials.
- Snow-shedding panel geometry and smooth metal surface minimize accumulation and help reduce ice-dam formation during freeze–thaw cycles.
- Class A fire-rated available for homeowners seeking enhanced ember and flame resistance.
- UL 2218 Class 4 impact resistance offers protection from hail, falling branches, and storm debris.
- Energy-efficient cool-roof characteristics help reduce heat gain during occasional summer heat waves and improve attic comfort.
- Engineered for bracket‑mounted photovoltaic systems, supporting rooftop solar without compromising roof performance.
- Fully recyclable aluminum supports sustainable remodeling and lowers end‑of‑life environmental impact.
- A range of premium architectural profiles replicates slate, cedar shake, and tile, plus standing seam options for refined Medina curb appeal.
- Backed by a lifetime‑limited transferable warranty to protect your investment and support King County resale value.
- Specifically tuned for Medina and King County atmospheric‑river events: panels and seams shed intense, prolonged rainfall to limit saturation and reduce leak risk.
- Designed for Medina’s lakeshore salt‑air exposure: Alunar®‑coated aluminum resists salt‑air corrosion to protect finishes, fasteners, and substrate interfaces.
- Coated surfaces and low‑porosity finishes inhibit moss and biological growth common on shaded, moisture‑rich Medina roofs, cutting routine cleaning and remediation.
Metal roofing built for Medina'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 Medina, Washington
Interlock® Aluminum Roofing — all-climates performance specs for Medina, 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 Medina, Washington:
Explore all Interlock® metal roofing systems, or see the Guardian lifetime warranty and independent testing reports.
Recent Interlock® roofs across Washington
1 completed Interlock® metal roofs in Medina, WA
Interlock® has completed 1 metal roof in Medina, Washington between 2003, across 1 roof profile (Shingle). Every marker is a real, anonymized installation completed by a Certified Interlock Installer — explore them on the interactive map and photo grid below, filterable by profile, colour and year of completion.
- 1completed roofs
- 1roof profile
- 2003years
Open Medina on the interactive project map →Browse all Interlock® projects in Washington →See more Interlock® projects →
What our customers are saying:
Deciding to switch to an aluminum roof was a significant decision for us, and honestly, the selection process was a bit overwhelming. There are so many styles and finishes available, and it took us quite a while to finally make our choice. If you're considering aluminum, be prepared to invest time in understanding your options. The installation process itself also took longer than we initially anticipated, especially compared to the asphalt shingle replacements we've had done in the past. This is something to factor into your timeline if you're working with specific deadlines. However, despite the longer decision and installation periods, we are extremely pleased with the final result. The aluminum roof looks fantastic and has significantly improved the curb appeal of our home. It truly turned out nice. We were also impressed with the attention to detail shown by Interlock Metal Roofing. They used what appeared to be the correct mounting hardware, ensuring a secure and professional installation. Additionally, they didn't hesitate to replace any damaged or weakened boards as needed, which gave us peace of mind regarding the roof's long-term integrity. Overall, while the decision-making and installation processes were more involved than expected, the quality of the finished product and the professionalism of Interlock Metal Roofing made it a worthwhile investment. We would recommend them to others considering an aluminum roof, with the caveat that they should be prepared for a longer timeline.
I want to express my appreciation for your company's excellent response to our recent need for replacement of deteriorating closure material on our metal roof installed about four years ago. It is a pleasure to deal with people whose first priority is customer satisfaction. I'd like to particularly thank Steven Jasper, the installer responsible for the work. He was competent, efficient and thorough. It was a large job and particularly difficult because of its height off the ground as well as the " data-wpil-keyword-link="linked">hot weather. I also want to thank Wendy Willans of your customer service department who arranged for the work effectively and promptly. I will not hesitate to recommend your company to anyone interested in a high quality metal roofing installation by people eager to stand behind their products and workmanship.
Interlock Metal Roofing is a wonderful product. Michael did an awesome presentation and was very professional and thorough answering all of our questions. If you are in the market for a new roof give them a chance!
To a person everybody in sales (Ross specifically) at Interlock Roofing was knowledgeable and professional. When we were evaluating our roofing alternatives, they took the time and energy to answer our many questions. Obviously, there are less expensive alternatives, and they did a good job explaining the differences between the various roofing and metal roofing options. Patrick and May were great at setting our expectations prior to installation. On the installation side I had a list of items for review prior to work being done. Tony the manager and Poval (sp) his crew lead made sure each of those items were addressed to our satisfaction. We have had the new roof for only 6 days and the roof looks amazing and our house looks much better. [modula id="139676"]
When my husband Richard said he wanted to put a metal roof on this 1929 English Tudor house, I thought he had gone around the bend, maybe several bends. After seeing the pictures and hearing about the features, I started to become a convert. Now that the job is down, I know that we made the right decision for several reasons. First, the black Interlock shingles look so appropriate on this house. In certain lights it even appears to look like " data-wpil-keyword-link="linked">slate. Many neighbors and friends have commented on how very attractive it looks, Secondly, the workmen did such a professional job. They were meticulous at each step of the process and, we are confident, that their craftsmanship was excellent. Each day that they were here they worked diligently and conscientiously making sure that every step of their work was done to the highest expectations. In addition, they were quiet and tried not to interrupt our daily routine. Third, we are most pleased about all the high quality features of the product: the durability, the appearance, and the fact that it is maintenance free. Thank you for making the excellent product.
Great work on time excellent communication excellent clean up
We were extremely satisfied with the result of the installation of the roof. The process was smooth, and the quality of the product is very good. The communication after the signing of the contract could be better. I was extremely happy with the installation, and the product is supreme.
The crew did a good job and they try to get it done before sun going down and so they work very hard and fast. But by doing that the details of the work is when out the windows , the quality of the work is not there . Taking another day to get it done would please any owner with the work done right and nothing left for the owner to pick it up later. Thanks for the hard work and got it done in one day.But quality of the work is not there so if in the future please! Take your time to slow down and look over your work it would be more professional way to provide a service. I hope you can use the recommendation from an retired airplane builder and testing.The products are the best plus the quality of your work makes it hard to beat by any competitors out there on the market thanks again
Mr. Ross and Interlock Industries, Kathy and I are very pleased with our new roof. During installation, your crew was able to adapt the project around our 100-year-old chimneys and finally completely seal us against leaks. The first summer of the new roof was worth the project’s price and exceeded our expectations for performance. We did not have the old problems of the attic area overheating. The attic fan barely comes on unless it is a very " data-wpil-keyword-link="linked">hot day. But we are no longer feeling the heat on the third floor, where all the bedrooms are. Less heat means more comfortable nights and sleep. If anyone would like to see how the roof looks or performs, we would be happy to show the roof to people interested in the Interlock Industries product. Even the exterior of the house looks better, but surprisingly the roof does not look like it was covered with a metal material. The selected pattern both fits the look of the house and looks compatible with our neighborhood houses. We care very pleased with the roof and the guarantee that accompanies the roof.
We are extremely happy with our new Interlock standing seam roof. The appearance is great, the heat absorbtion is noticeably lower than our old asphaltic shigle roof, and we won't have to worry about our roof for another 50 years! Better communication about the delays.
Overall a great experience and product - no concerns or recommendations.
They could have improved on the scheduling. Overall I am happy with the roof, it look greats.
Nearby service areas in King County
Interlock® metal roofing is also installed in these communities near Medina:
Interlock Metal Roofing (PNW) Inc. also services nearby States
Beyond Medina, our team installs Interlock® metal roofing across:
Metal Roofing FAQs for Homeowners in Medina
The following metal roofing FAQs are designed specifically for homeowners in Medina, 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 Medina.
Does metal roofing handle heavy snow loads in Washington winters?
Yes. Medina receives about 194 cm of snow yearly, and Interlock's four-way interlocking aluminum panels shed snow effectively while resisting ice dam formation. The panels install at just 0.41 lb/sq ft (Shingle profile) — so light that no structural reinforcement is needed, even with snow accumulation. The four-way interlock prevents water infiltration during freeze-thaw cycles, which occur roughly 58 days per year here. This combination keeps water from backing up under panels and freezing, a common problem with heavier roofing materials.
Will freeze-thaw cycles in Medina damage a metal roof?
Aluminum actually thrives in freeze-thaw conditions because it contains no iron and cannot rust. Medina's climate averages 58 freeze-thaw days annually, creating ideal conditions for rust in steel roofs — but Interlock aluminum's oxide layer self-heals when scratched, preventing corrosion year after year. The Alunar 70% PVDF coating is warranted 30 years against fading and chalking (ASTM D4214), protecting the metal through salt air exposure and wet winter cycles. With 1761 mm of annual rainfall plus snow melt, a material that won't corrode becomes a significant advantage.
How does metal roofing perform in Medina's rainy climate?
The four-way interlocking panel design creates multiple overlapping seams that direct Medina's 1761 mm of annual rainfall cleanly away. Each panel locks on all four sides, eliminating the gaps where water penetrates traditional shingles. Interlock can install directly over an existing roof, adding a second layer of weather protection without tear-off. Combined with solid deck installation and proper underlayment, the system is as quiet and leak-proof as asphalt — no rain noise, no water entry. The Guardian warranty covers leakage, giving original owners lifetime protection.
Can metal roofing withstand Medina's winter wind gusts?
Yes. Medina experiences typical daily winds around 11 km/h but gusts reaching 128 km/h. Interlock's four-way interlocking panels are warranted to resist wind speeds up to 120 mph (193 km/h) when installed to specification — exceeding even the worst gusts recorded here. The mechanical interlock between panels prevents uplift and flutter. Unlike overlapped shingles that can peel and channel wind underneath, the continuous panel system stays locked in place during storms. This engineered wind resistance is verified under installation standards and backs real insurance benefits.
Will hail damage a metal roof, and can it lower insurance costs?
Interlock aluminum roofing carries a UL 2218 Class 4 impact rating, the highest hail classification available. The warranty even covers perforation from hailstones up to 1.5 inches. Medina's freeze-thaw cycling and occasional severe weather make impact durability essential. Class 4 rating often qualifies homeowners for insurance discounts or premium reductions — check with your insurer. Unlike composition shingles that soften in sun then harden in cold (losing flexibility), aluminum maintains consistent impact resistance across Medina's temperature swings (mean 9.8°C). Combine non-combustible aluminum with superior impact performance and you reduce both weather risk and insurance cost.
Why does aluminum never rust like steel roofing?
Aluminum contains zero iron, so rust is chemically impossible. Steel roofs corrode rapidly in Medina's wet climate with 1761 mm annual rainfall and freeze-thaw stress 58 days per year. Interlock uses roofing-grade 3105-H24 / 3003-H24 aluminum alloy (ASTM B209), which forms a protective oxide layer that self-heals when scratched. The Alunar 70% PVDF fluorocarbon finish is applied to both sides of every panel, providing an extra barrier against salt air and moisture. After 26 years of manufacturing since 1998 — and installations from coastal saltwater homes to an Antarctic research station — there is no rust history. This permanence eliminates the replacement cycle steel roofs demand.
Do I need to reinforce my roof structure for metal roofing?
No structural reinforcement is needed. Interlock's Slate and Cedar Shingle profiles weigh just 0.41 lb/sq ft, while the Mediterranean Tile profile — which replicates the look of heavy clay tile — weighs only 0.59 lb/sq ft. That's approximately 96% lighter than actual concrete or clay tile. Most existing Medina homes can support the installation directly over current roofing, saving thousands in structural upgrades. The ICC-ES evaluation report ESR-1790 (reissued 2025 for IBC/IRC) documents this lightweight performance. For homes with age-related framing concerns, the ability to install without reinforcement makes metal roofing feasible where heavier materials would require costly rebuilding.
What warranty covers a metal roof, and how long does it last?
The Guardian Warranty provides a lifetime limited, non-prorated material warranty for the original owner — covering rusting, rotting, splitting, cracking, curling, and loss of impact resistance. The warranty is one-time transferable, extending 50 years from completion for the next owner. This dual-tier protection acknowledges the roof's expected lifespan: in Medina's climate (1761 mm rain, 194 cm snow, 58 freeze-thaw days yearly), aluminum roofing with PVDF coating easily outlasts 2–3 asphalt roofs. No prorated means no declining coverage; the original homeowner receives full warranty protection for life. For buyers considering Medina homes, the 50-year transferable term adds genuine resale appeal and cost certainty.
What's involved in installing a metal roof, and how long does it take?
Interlock Metal Roofing (PNW) Inc. has served the region since 1997, bringing deep experience with Medina's weather conditions. Installation involves securing the four-way interlocking aluminum panels over solid deck (existing or new), underlayment, and trim work. The panels can install directly over your current roof, avoiding expensive tear-off and landfill disposal. Timeline depends on roof size and complexity, but the lightweight panels and mechanical interlock system speed installation compared to traditional shingles. Local installers manage gutter integration, flashing, and final details to handle 1761 mm annual rainfall and 128 km/h gusts safely. A direct conversation with the regional team provides accurate timing and cost for your specific home.
Is metal roofing better for the environment than asphalt shingles?
Yes, substantially. Interlock aluminum is approximately 95% recyclable at end of life, breaking the asphalt tear-off-to-landfill cycle that replaces composition shingles every 15–20 years. Medina's 1761 mm annual rainfall and 58 freeze-thaw days accelerate asphalt degradation, creating frequent waste. Aluminum roofing lasts generations without replacement, eliminating repeated disposal. CALGreen verification confirms reduced maintenance burden and resource consumption. The manufacturing process in Delta, BC uses established recycling infrastructure, and old Interlock panels return to aluminum supply chains rather than landfills. For homeowners committed to lower lifetime environmental impact, metal roofing replaces a consumable product cycle with a durable, circular-economy solution.
Is a metal roof a good choice for Medina’s climate?
Yes. Medina 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.
