Metal Roofing in Headquarters, Washington — Lifetime Interlock® Aluminum Shingles Installed Locally
Headquarters Metal Roofing Experts Installing Lifetime Interlock® Aluminum Shingles Since 1997
What do Interlock customers in Washington say?
Interlock has 734 published customer reviews from Washington, covering installations reviewed between 1999 and 2026. They average 4.7 out of 5, with 669 collected through independent GuildQuality surveys. Interlock® Slate is the most frequently installed system in the region, appearing in 287 of these projects. Across the surveys that scored individual categories, quality of materials rates highest at 4.9 out of 5.
Metal Roofing Built for Headquarters's Heavy Rain, Snow Loads, Windstorms & Lifetime Protection
Interlock Metal Roofing (PNW) Inc. is the trusted local metal roofing contractor and exclusive authorized installer of Interlock® lifetime aluminum roofing systems in Headquarters, Washington. Since 1997, we have helped homeowners protect their properties with heavy-gauge, fire-resistant, and energy-efficient roofs engineered for the unique weather challenges of the Pacific Northwest. Our roofs are designed to shed snow efficiently during harsh winters, withstand heavy rain and wind, and resist moss and algae growth common in the region’s damp climate. Choose from the timeless beauty of slate, cedar shingles, shake, Mediterranean tile, or standing seam profiles—all with the unmatched strength and durability of metal. Every Interlock roof is protected by the advanced Alunar® Coating System and backed by a Lifetime Warranty, ensuring long-term performance and peace of mind for your home in Headquarters, WA. For roof replacement or re-roofing, trust Interlock Metal Roofing (PNW) Inc. for superior protection, energy savings, and curb appeal.
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 ~1500 mm of rain a year
Corrosion Resistant
Aluminum does not develop iron rust
- Authorized Interlock® installer serving homeowners in Headquarters and throughout Cowlitz County
- The aluminum is Coated with the Alunar® Coating System (no visible aluminum surface) for sustained finish 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
- Architectural profiles replicate slate, cedar shake and tile while standing-seam options provide modern, high-performance attachment for Headquarters homes
- Tested to resist wind loads of 120+ mph (193+ km/h) to withstand severe windstorms that can affect Cowlitz County properties
- Class A fire-rated available to help reduce wildfire and ember-risk exposure during dry late‑season periods near Headquarters
- UL 2218 Class 4 impact resistance to limit damage from hail, falling branches and storm debris common in Pacific Northwest storms
- Aluminum panels shed snow and reduce ice-dam formation where freeze–thaw cycles affect higher‑elevation properties around Headquarters
- Energy-efficient cool-roof behaviour reduces heat gain during inland warm spells and improves attic comfort for Headquarters residences
- Solar-compatible engineering supports secure bracket-mounted photovoltaic systems for homeowners in Headquarters
- Low-maintenance, corrosion-resistant system specified for persistent wet-season conditions and extended service life in Headquarters’ climate
- Backed by a Lifetime‑Limited transferable warranty to protect long‑term investment and resale value in Cowlitz County
- Specifically designed for atmospheric-river driven downpours—seams and fastenings manage heavy runoff and resist wind‑driven rain in Headquarters
- Coastal salt‑air exposure can reach low-lying parts of Cowlitz County; Alunar®-coated aluminum resists salt corrosion where marine influence affects homes near Headquarters
- Moss and organic growth are common in Headquarters’ damp microclimates; smooth Alunar® surfaces and steep-panel drainage reduce biological buildup and roof deterioration
- Fully recyclable aluminum construction supports sustainability goals for environmentally conscious homeowners in Headquarters
Metal roofing built for Headquarters's climate
Averages (10-yr): ~1500 mm rain and 51 cm snow per year, ~2835 sunshine hours, mean 11.6°C, typical daily-max winds ~14 km/h with gusts to 103 km/h, and ~24 freeze–thaw days per year.
- 51 cmavg. snow / year
- 1500 mmavg. rain / year
- 24freeze–thaw days / year
- 103 km/hpeak wind gusts
- 2835 hrsannual sunshine
- 11.6°Cmean temperature
Roof performance depends on the selected profile, tested assembly, roof structure and installation details. Class A fire-rated assemblies are available. Confirm applicable ratings in the testing reports and review the limited warranty before selecting a system.
Interlock Metal Roofing (PNW) Inc.
- 5608 17th Ave NW suite 1574, Seattle, WA 98107, United States
- Phone 206-589-8423
- Local lines Bellevue 425-225-4805 · Bellingham 360-502-4018 · Tacoma 253-352-2725 · Stanwood 206-202-7814 · Vancouver 360-873-5878
- Sales & Marketing sales@washingtonmetalroofing.com
- Toll-Free 1-866-733-5811
- Customer Service pnwservice@interlockroofing.com
- www.WashingtonMetalRoofing.com
- License WA #INTERMR75406
- Serving Washington since 1997 — 28 years
Hours
- Monday9:00 AM – 5:00 PM
- Tuesday9:00 AM – 5:00 PM
- Wednesday9:00 AM – 5:00 PM
- Thursday9:00 AM – 5:00 PM
- Friday9:00 AM – 5:00 PM
- SaturdayBy appointment
- SundayBy appointment
Interlock Metal Roofing (PNW) Inc. – Washington is a trusted metal roofing contractor proudly serving homeowners and businesses throughout Washington State. With decades of experience in the roofing industry, Interlock has built a reputation for unmatched quality, reliability, and customer satisfaction. As a specialized installer of premium aluminum and standing seam metal roofs, Interlock is an exclusive authorized installer of top-tier roofing systems designed for performance, longevity, and weather resilience — specifically engineered for the Pacific Northwest climate. Founded on principles of craftsmanship and integrity, Interlock Metal Roofing (PNW) Inc. has completed thousands of roofing projects with precision and professionalism, earning the loyalty of customers from Seattle to Spokane. Our team is known for timely project delivery, transparent communication, and exceptional workmanship, backed by robust warranties and industry-leading materials. Interlock’s commitment to excellence has been recognized through local and regional industry awards for safety, quality, and customer service. We stand out for our rigorous training standards, OSHA-certified crews, and adherence to best practices in roofing performance and installation safety. Whether it’s a residential metal re-roof, commercial roof installation, or custom architectural metal roofing, Interlock Metal Roofing (PNW) Inc. brings trusted expertise, lasting product solutions, and an unwavering focus on client satisfaction. Homes and businesses throughout Washington choose Interlock as their go-to metal roofing specialist because we deliver durable, high-performance roofs that stand the test of time.
Recognition GuildQuality Guildmaster Award — verified customer satisfaction (GuildQuality)
Accredited BBB Accredited A+
Get a Free Metal Roof Estimate in Headquarters, Washington
Interlock® Aluminum Roofing — all-climates performance specs for Headquarters, 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 Headquarters, 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 Headquarters, WA
Every marker is a real, anonymized Interlock® aluminum roof completed by an Interlock Installer. Explore verified Interlock® installations near Headquarters, 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 Headquarters on the interactive project map →Browse all Interlock® projects in Washington →See more Interlock® projects →
What our customers are saying:
I had a fantastic experience with Interlock Metal Roofing! Their team was incredibly easy to work with and very responsive to all of my questions throughout the entire process. I want to give a special shout-out to our installers, Victor and Daniel. They were extremely professional, friendly, and did an amazing job installing our new roof. The new metal roof looks absolutely amazing! I highly recommend them to anyone looking for a high-quality roofing experience.
Interlock Roofing is amazing. From the first day I met their salesman to the day they started work on our barn and house. They were very easy to talk to and express our concern about how important it was to keep our hay safe from rain and the ground around the barn safe for the animals. They were fast exceptionally clean and so much fun to get to know. I definitely would recommend this company to anyone who wants to have a roof that will last a life time. Thank you for an amazing job and two beautiful roofs!
Homeowners in Castle Rock, WA love their new metal roofing from Interlock Metal Roofing (PNW) Inc. After a great first experience, we chose Interlock again for our new home—and the results are stunning.
They all did a great job. Really liked the install crew. Was a pleasure...not sure where anyone could improve.
They did a great job on the roof, and it looks great. There was a little confusing with setting up the payments, but Rene was nice with helping me figure everything out.
Professional and timely, installation was ahead schedule. A post (1-2 months) inspection done by non installers.
Needed to put this project on hold, due to other issues that have arisen. You will be the first people we call when we are ready to roof our home.
I had originally planned to use the product on a new building but needed an older house reroofed. Newer building has been put on hold for now.
COMMUNICATION!!Don't make appointments and then not show up, don't miss appointments and make customers call for days to find out why and when the new appointment will be just to not show up again. ANSWER the PHONE when people call, having customers sit without information is infuriating and just makes them unhappy from the start. So...Communication and customer service improvement would be great. We were very upset with the wasting of our vacation time...
Timeliness, management communication with the customer.Not at this time. Dissappointed in time it took to complete project.
Nearby service areas in Cowlitz County
Interlock® metal roofing is also installed in these communities near Headquarters:
Interlock Metal Roofing (PNW) Inc. also services nearby States
Beyond Headquarters, our team installs Interlock® metal roofing across:
