When it comes to building with metal, choosing the right supplier is just as important as choosing the right product. Washington State is home to a strong network of metal manufacturers and distributors that support everything from residential roofing to large-scale commercial and architectural projects. Whether you’re a contractor, architect, or DIY homeowner, finding a supplier that can deliver both quality and reliability is key.
At Western States Metal Roofing, we understand how much your project depends on dependable materials, excellent customer service, and timely delivery. As a manufacturer of metal roofing and siding panels we will provide all of this to you. However, we aren't afraid to highlight some of our competitors so you can see what else is out there. Below, we’ve highlighted some of the best metal suppliers in Washington State and what makes each one stand out in the Pacific Northwest construction industry.
Why the Pacific Northwest is unique for metal roofing and metal siding?
In the region spanning Washington, Idaho (and nearby states), metal roofing and siding have become increasingly popular — and with good reason.
- With heavy rainfall, snow loads, and rapidly changing temperatures, durable materials are in demand. The PNW’s climate sees everything from 100°F summer days to well below freezing winter temps.
- Metal roofing and siding offer longevity, lower maintenance, and strong weather resistance — important when you’re dealing with snow, wind, or coastal conditions.
- Because of longer supply lines, transport time, and special profiles (standing seam for low slope, for example), having local/regional manufacturers/distributors makes a big difference.
- For the keywords we care about: you’ll want a metal manufacturer (makes the material), metal distributor/supplier (stocks and delivers), for metal roofing and metal siding projects in Washington & Idaho.
5 Top Metal Manufacturers & Suppliers in Washington & other states in the Pacific Northwest
-
The Metal Mill
Overview: Based in Napavine (Chehalis area), Washington, The Metal Mill manufactures metal roofing, siding and trim for homes, agricultural buildings, shops, pole buildings and more. The Metal Mill+1
What they specialize in:
- Roof and wall metal panels: e.g., 3′ wide ProPanel (28 gauge) and 16″ or 12″ SnapLock (26 gauge) options. The Metal Mill
- Custom fabrication of trim, flashing, accessories and carport/pole building packages. The Metal Mill+1
- Local manufacturing: “Manufactured in Washington State … no middlemen — we work directly with homeowners and contractors.” The Metal Mill+1
What makes them great for metal roofing & metal siding in WA/ID:
- Local presence means shorter lead times, familiar with Pacific Northwest weather (rain, snow, wind) and conditions.
- Direct from manufacturer to contractor/homeowner — less markup, more flexibility.
- Offers both roofing and siding solutions, which is helpful when the project involves a full exterior envelope.
Link: The Metal Mill
Why it matters: If you’re in Washington (or nearby Idaho) and looking for a supplier that acts as a manufacturer + supplier for metal roofing and siding, The Metal Mill is a strong regional option.
2. Metal Exteriors (sometimes “Metal Exteriors, LLC”)
Overview: Although not exclusively PNW-based, Metal Exteriors describes itself as a supplier of metal roofing, siding and panel solutions tailored for residential, commercial and industrial uses. Metal Exteriors
What they specialize in:
- Metal panel systems for roofing and siding — aiming for durability, aesthetic appeal and high performance. Metal Exteriors
- Offering design support, downloadable textures/3D resources for design software, which suggests they cater to architects/builders as well as contractors. Metal Exteriors
What makes them great for metal roofing & siding:
- Their focus on “innovative and high-quality roofing and siding products” makes them a viable option when you want more than standard panels — maybe custom finishes or design-forward materials.
- While not explicitly headquartered in Washington/Idaho (their mailing address is Ohio), their product model suggests they can supply across regions or serve as a secondary supplier/distributor.
Link: Metal Exteriors
Why it matters: For larger or design-sensitive projects (residential custom homes, commercial buildings) where you want premium metal siding/roofing panels, Metal Exteriors can complement regional manufacturers/distributors.
3. Metal America (Post Falls, Idaho & Spokane Valley, Washington)
Overview: Metal America is a company that provides roll-formed steel panels for metal roofing and siding that works great will all types of buildings – for residential, commercial, agricultural.
Why they stand out:
- Family owned, with 25+ years of installation experience informing their manufacturing decisions. Metal America
- They serve both Idaho and Washington markets directly — good for regional sourcing. Metal America+1
- A wide variety of profiles (Tuff Rib, QuickLoc™, 7/8″ Corrugated, etc) tailored for metal roofing and siding applications. Metal America+1
What to know for your project: If you want a strong regional manufacturer for metal roofing or siding and want to get design + performance, this is a solid choice.
Link: Metal America
3. ASC Building Products
Overview: ASC is a manufacturer of premium metal roofing and wall (siding) panel solutions for residential, agricultural and light-commercial markets. ASCBP+1
They have been operating for decades (since 1971 as part of their parent/group) in the metal building products space, meaning they bring experience in metal panel fabrication and performance. MapQuest+1
What they specialize in:
- Metal Roofing & Siding Panels: ASC’s core competency is metal roof panels and metal wall panels (siding) rather than asphalt shingles or plain sheet siding. ascprofiles.com+1
- Multiple Application Types: Their offerings cover residential homes (homeowners and remodels), agricultural buildings (post-frame, barns, outbuildings) and light commercial construction. ASCBP+1
- Performance-Rated Products: Products like their “Design Span® hp” and “Skyline®” standing seam panels are designed for structural performance, durability and aesthetic integration. Washington Cedar & Supply+2ASCBP+2
- Color & Finish Options + Sustainability Features: ASC emphasizes “cool” color options (for solar reflectance), corrosion resistance coatings/paints, recyclability (steel is 100% recyclable) and long life. rooferscoffeeshop.com+1
- Technical Support & Documentation: They publish technical bulletins (for installation, maintenance, prevention of oil-canning, etc) which indicates a more premium, serious approach to metal roofing/siding. ASCBP
Why they’re recognized: High-quality coatings and color systems designed for long-term durability. Part of BlueScope Steel, ASC Building Products has a strong presence in the western U.S. Their panels are well known for their quality coatings and color options suited for harsh weather environments, making them ideal for Washington’s diverse climate.
4. Northwest Steel
Overview: Northwest Steel is a regional manufacturer and supplier of metal roofing and siding products, operating with facilities in both Milton-Freewater, Oregon and Newport, Washington. Northwest Steel+2Northwest Steel+2 The company emphasizes serving contractors, lumber yards, and DIY‐builders in the Pacific Northwest with locally manufactured panels, trims, accessories, and metal building components. Northwest Steel+1
What they specialize in:
-
Ag Panels & PBR Panels: The company manufactures Ag (agricultural) panels and PBR (commercial rib) panels which are well suited for siding and roofing uses. Northwest Steel+1
-
Standing Seam & Premium Panels: They offer SnapLock standing seam, concealed‐fastener systems, and other premium profiles like ClipLoc and 2″ mechanical seam panels. Northwest Steel+1
-
Board & Batten, Soffit/Flush Wall Panels: Beyond standard rib panels, they also provide architectural siding panels (16″ and 33″ board & batten), soffit/flush wall panels, etc. Northwest Steel
-
Trim, Accessories & On-site Forming: They cut custom trims (lengths to 20’), roll panels on-site (especially for the standing seam trailer in OR), and supply accessories (fasteners, underlayments, closure strips). Northwest Steel+1
-
Local Manufacturing with Service: With their two facilities they serve both western and eastern regions of the Pacific Northwest, offering quicker turnaround and local support. Northwest Steel+1
Why it matters: If you are planning a metal roofing or siding project in Washington or Oregon (or the surrounding areas), they are a strong candidate to consider.
5. Pacific Metal Company
Location: Seattle, WA & Tualatin, OR
Overview: Pacific Metal Company is one of the oldest independent metal distributors in the Pacific Northwest. They offer a broad range of aluminum, stainless, and carbon steel products, supporting fabricators and manufacturers throughout the region.
What they specialize in:
- Extensive metal inventory & material types: Pacific Metal stocks a large variety of flat-rolled sheet and coil materials — aluminum (which at one point made up ~40% of their volume); painted/coated carbon steel; galvanized steel; stainless; copper; etc. Pacific Metal Company+1
- Processing and value-added services: They are set up for high-volume and precision processing: cut-to-length, shearing, slitting lines, blanks and JIT (just-in-time) inventory programs. This means that if you’re a fabricator or installer, you can get material that is nearly ready for your specific panel system rather than raw stock. Pacific Metal Company+1
- Local/regional distribution footprint: With their Oregon headquarters and branches across the Northwest (including Washington, Idaho, etc) they serve the regional market efficiently. Pacific Metal Company+1
- Customer-diverse industries: While not exclusively for roofing/siding, they serve HVAC, roofing & gutter contractors, building products, fabrication — so they have experience with building-industry metal demands. Pacific Metal Company
-
Why they’re recognized: Extensive inventory and reliable regional distribution.
Choosing the Right Metal Supplier for Your Project
How to choose among them
- Location & logistics: If your job site is in western Washington, The Metal Mill is geographically strong. If it’s in eastern Washington/Idaho, Rolled Steel Products offers proximity. If you need something specialized in terms of panel design or finish, Metal Exteriors could be a fit.
- Panel type & profile: Determine if you need standard exposed-fastener panels, standing seam, custom trim, etc. Some suppliers/manufacturers excel at customization, others at volume.
- Roofing and siding: If your project includes both metal roofing and metal siding (the keywords we care about), pick a supplier/manufacturer that offers both under one roof (pun intended).
- Support & accessories: Do you need fasteners, trims, flashing, and guidance/engineering? The Metal Mill emphasizes custom fabrication and engineering.
- Lead time & custom work: Local fabricators mean quicker turnaround. If you have custom lengths, unique colors, or complex building geometry (low slope, heavy snow zone), choose accordingly.
- Budget vs premium: Some suppliers aim for standard cost-effective panels; others target premium finishes/designs. Match to your budget and aesthetic.
At Western States Metal Roofing, we take pride in helping our customers through every stage of their project — from product selection to delivery. Whether you’re building a modern home, an agricultural barn, or a commercial facility, our goal is to make sure you have the best materials for the job.
Top Metal Suppliers in Washington State: Western States Metal Roofing
Location: Spokane Valley, WA
Specialty: Metal roofing and siding panels, trim, and accessories
As both a manufacturer and supplier, Western States Metal Roofing provides factory-direct metal panels in a wide variety of colors, finishes, and profiles. Our Tacoma location allows us to serve contractors, architects, and suppliers across Washington and the Pacific Northwest efficiently and affordably.
We specialize in:
- Standing seam, corrugated, and ribbed metal roofing systems
- Metal siding panels in modern and traditional styles
- Weathered finishes like Corten®, Vintage®, and Matte colors
- Custom fabrication and trim options
Final Thoughts
Washington State has a strong community of metal suppliers, but few combine manufacturing, distribution, and design expertise under one roof like Western States Metal Roofing. Our Tacoma location is proud to serve the Pacific Northwest with high-quality metal panels and personalized service designed to make your next project a success.