I still remember the first time we had to replace hollow metal doors at one of our job sites. What should’ve been a quick swap turned into delays, mismatched specs, and a vendor that ghosted us halfway through.
That experience taught me that the right supplier makes all the difference in your timeline, your costs, and your peace of mind.
Since then, I’ve spent years working with various door suppliers. Testing their service, delivery, pricing, and most importantly, how they handle problems.
What I’m sharing with you here isn’t fluff. It’s from the field.
In this article, I’ll walk you through 7 hollow metal door suppliers I trust. You’ll get the strengths, weak spots, and exactly what types of projects each one is best suited for.
If you’re sourcing doors for commercial or industrial projects, this guide is made for you.
So let’s dive in!
Quick Comparison Chart
Here’s a comparison table of the 8 featured hollow metal door manufacturers and suppliers.
This table summarizes each company across seven key dimensions to help you quickly evaluate who’s best suited for your project needs.
| Company | Headquarters | Primary Market Focus | Strengths | Customization | Certifications & Compliance | Business Model | Ideal For |
| ASSA ABLOY Group | Stockholm, Sweden / New Haven, USA | Commercial, Institutional, Industrial | Full Div 8, premium brands | Extensive (via brands) | SDI, UL, Intertek, LEED, ISO | Manufacturer (Multi-Brand) | Large commercial builds |
| Allegion | Carmel, Indiana, USA | Commercial, Institutional | Reputation, U.S. made, high-security | High (spec-driven) | SDI, UL, NFPA, LEED, AAMA | Manufacturer (Brand-Focused) | U.S. institutions |
| Vallisco | Shanghai, China | Villas, Houses, Hotels, B&Bs (SEA & Europe) | Full-house packages, project service | Very High (color, size, function) | ISO, U-value, regional adaptable | Manufacturer/Supplier (Project-Based) | Hospitality, custom homes |
| Mesker Door | Huntsville, Alabama, USA | Commercial, Industrial, Institutional | Legacy, storm/bullet resistance | High (retrofits, specialty) | SDI, ANSI, UL 752, Miami-Dade, LEED | Manufacturer (Security Specialist) | High-security, retrofit jobs |
| Gensteel Doors | Saint-Laurent, Quebec, Canada | Commercial, Industrial, Severe Weather | Rust-proof, storm/fire rated, warranty | High (impact, acoustic, lead) | UL, Intertek, ASTM, Miami-Dade | Manufacturer (Performance Focused) | Severe weather zones |
| Trudoor | Boston, Massachusetts, USA | GCs, Builders, Small Contractors | Multi-brand, fire mods, fast ship | High (mods, brands) | UL, Intertek shop, SDI, BBB A+ | Distributor (Aggregator) | Fast, flexible orders |
| Hörmann Group | Steinhagen, Germany | Industrial, High-End Commercial, EU Projects | German-engineered systems, global scale | Mod–High (system packages) | EN 1634, CE Marked, ISO | Manufacturer (Integrated Systems) | Industrial EU projects |
1. ASSA ABLOY Group
Company Overview
When it comes to securing buildings, I’ve seen a lot of teams struggle with fragmented solutions, one vendor for doors, another for locks, yet another for compliance. That’s where ASSA ABLOY feels like a breath of fresh air. This is a company that doesn’t just make doors—it builds complete access solutions.
Started in 1994 as a merger between ASSA of Sweden and Abloy of Finland, they’ve grown fast by acquiring strong local brands and keeping their strengths intact. You get global scale with a local touch.
You won’t feel like just another account here. With decades of proven performance, they’ve become a go-to for teams needing everything from simple office doors to complex, spec-heavy solutions.
- Address: Klarabergsviadukten 90, SE-111 64 Stockholm, Sweden
- Website: www.assaabloy.com
- Year Established: 1994
Product Portfolio
- Ceco Door: These guys in Tennessee know durability. From hurricane-rated StormPro to energy-saving TRIO-E, they cover a wide range of commercial and institutional needs with solid steel performance.
- Curries: Iowa-based Curries has one of the biggest facilities I’ve seen, and it shows in their flexible product lines. You can order custom and standard doors in one go—no juggling specs or lead times.
- Baron Metal Industries Inc.: Based in Ontario, Baron sets itself apart by using galvannealed steel across the board. That means better paint adhesion and rust resistance—especially useful in harsh Canadian winters.
- Fleming Door: Also in Canada, Fleming brings a high-spec mindset. Their acoustical doors reach an STC rating of 66, and they offer everything from blast- to bullet-resistant models—ideal for secure facilities.
Services
ASSA ABLOY doesn’t stop at hardware. They offer full-service project support through their Door Security Solutions (DSS) team, including on-site assistance, technical consulting, and help navigating tricky codes.
What stood out to me most was their BIM tool—Openings Studio™. It lets architects and GCs keep track of every door detail, from design through construction and even facility maintenance. It makes coordination easier and keeps everyone aligned.
Certifications & Standards Compliance
- Manufacturing & Quality: Brands like Ceco and Curries are SDI Certified. The group also participates in NAAMM and DHI and holds ISO 9001 and 14001 certifications globally.
- Fire Ratings: They offer fire-rated openings up to 4 hours, tested under UL and Intertek standards, including UL 10C and CAN/ULC S104.
- Green Building: You’ll find many GREENGUARD Gold-certified options here, which contribute toward LEED and WELL credits.
- Severe Weather & Security: Their doors meet FBC and TDI storm requirements and offer UL 752-rated bullet resistance, as well as forced-entry and blast resistance where needed.
Bottom Line
ASSA ABLOY gives you a one-stop shop for high-performance doors, plus the support and tools to simplify complex builds. Their global expertise combined with trusted local brands is hard to beat. But if you’re only looking for bare-minimum commodity doors, you may find their premium approach more than you need.
2. Allegion
Company Overview
Whenever I hear about a security product supplier that really understands doors and hardware, Allegion is always top of mind.
Formed in 2013 as a spinoff from Ingersoll Rand, Allegion may be relatively new as a name, but it brought with it a powerhouse lineup of legacy brands—like Schlage, Von Duprin, LCN, and of course, Steelcraft.
Allegion’s day-to-day operations for the Americas are run out of Carmel, Indiana. They’re not just a door company or a lock company, they’re both. And when you need full-door opening systems that meet code, perform under pressure, and ship on time, that matters.
- Address: 11819 N Pennsylvania St, Carmel, Indiana 46032, USA
- Website: www.allegion.com
- Year Established: 2013
Product Portfolio
- Steelcraft L-Series: This is Allegion’s top-of-the-line architectural steel door. You can pick from multiple gauges and cores like honeycomb, polystyrene, and even polyurethane for thermal efficiency.
- Steelcraft B-Series: Built with internal stiffeners, these doors are perfect for schools, hospitals, or anywhere subject to high abuse. Strength is the focus here.
- Steelcraft CE-Series: These embossed panel doors add a touch of style while still delivering full steel strength. Great when aesthetics and durability both matter.
- Steelcraft LS-Series: Full stainless steel models for areas with moisture, chemicals, or harsh environments. Corrosion resistance is the key selling point.
- Paladin™ PW Series: A standout in Allegion’s tornado protection lineup. These doors meet FEMA P-361 and ICC500-2014 and are one of the few options that include fire-rated glass lite for storm shelters.
- INPACT Hurricane Doors: Designed for hurricane-prone areas, these meet storm certification requirements and offer added peace of mind in critical weather zones.
Services
Allegion doesn’t just ship products—they support your project from start to finish. They offer fast lead times with their quick-ship program and provide technical support when you need to hit aggressive timelines. But what really makes a difference is their training.
Whether it’s a hands-on course at their facility or step-by-step install videos online, Allegion invests in educating contractors, facility teams, and specifiers.
Certifications & Standards Compliance
- Industry & Quality: SDI Certified and fully compliant with ANSI/SDI A250.8 and A250.6. Products are proudly American-made and regularly audited.
- Fire & Life Safety: L-Series and other models are Intertek-certified, UL 10C tested, and meet NFPA 252 and CAN4 S104 for fire protection—no edge-sealing required for Category A-rated doors.
- Severe Weather: FEMA-rated tornado doors and hurricane-certified assemblies give them an edge in high-risk zones.
- Sustainability: Allegion provides EPDs, HPDs, and holds Clean Air Gold Certification. Their annual ESG reports show measurable goals across emissions, water usage, and waste management.
Bottom Line
Allegion is a security-first company that brings together hardware, doors, and digital tools under one roof—with the strength of brands like Steelcraft leading the charge. Their FEMA- and hurricane-rated solutions show just how serious they are about protection. But if you’re working on a small-scale or highly customized decorative project, their industrial-grade focus might feel like more than you need.
3. Vallisco
Company Overview
When you’re managing a villa or boutique hotel project, finding the right partner for custom doors and windows can be tough. You want high-end looks, long-term durability, and someone who understands architectural needs, not just mass-market sales.
That’s exactly where Vallisco comes in.
Established as an independent brand in 2024, Vallisco operates as the door and window arm of Qeeka Home, a company with roots going back to 2007. While Vallisco may be new in name, the operation behind it has over 24 years of experience.
With headquarters in Shanghai, China, Vallisco serves developers and project owners across Southeast Asia and Europe, offering tailored solutions for villas, houses, B&Bs, hotels, greenhouses, and more.
- Address: Building 1, No. 1926, Cao An Highway, Jiading District, Shanghai, China 201824
- Website: www.vallisco.com
- Year Established: 2000
Product Portfolio
- Aluminum Alloy Doors & Windows: Vallisco’s core strength lies here. You get corrosion-resistant, weatherproof, and beautifully framed openings—available in sliding, folding, casement, and fixed configurations.
- Villa Entrance Doors: These aren’t off-the-shelf panels. Vallisco offers rich, secure, and stylish main entry solutions that blend elegance with anti-theft strength.
- Glass Curtain Walls & Sunrooms: For high-end homes or luxury guest spaces, their custom glass systems deliver open views and energy-efficient performance.
- Thermal Break Windows: Built for Europe’s stricter climate and energy codes, Vallisco’s thermal break products meet insulation standards without compromising design.
- Customized Solutions: Whether it’s unique sizes, colors, hardware finishes, or opening styles, their products are built around your project—not the other way around.
Service
Vallisco’s approach is hands-on and project-driven. They collaborate directly with homeowners, architects, and engineering teams to understand site-specific needs. This means helping spec out the right materials, glazing options, and finishes based on regional weather, project timeline, and desired design.
From consultation to delivery, the focus is on offering flexibility, speed, and a polished final product. With factory-direct production, they avoid the inefficiencies of third-party outsourcing and keep tight control over quality.
Certifications & Standards Compliance
- ISO-Aligned Manufacturing: Their parent company’s facility has operated under structured quality management for years—ensuring long-lasting performance across every unit.
- Thermal & Acoustic Testing: Products meet energy performance requirements in Southeast Asia and Europe, including models with U-values suitable for colder climates.
- Glazing & Security Options: Vallisco offers glass packages tested for wind load, sound insulation, and safety, with laminated and multi-pane options available.
- Regional Code Compliance: All products can be customized to meet the building code and project documentation standards required by engineers and regulators in target markets.
Bottom Line
Vallisco brings the full-package experience of a manufacturer-supplier who truly understands residential and hospitality projects. From premium villa doors to sunrooms and thermally broken windows, they offer tailor-made solutions that travel well globally and install cleanly onsite. However, their specialization in project-based customization may not suit buyers looking for quick, off-the-shelf standard units.
4. Mesker Door
Company Overview
When someone mentions “the original hollow metal door,” you’d be right to think of Mesker. They’ve been around since 1864 and they’re widely known for inventing the very first one. That legacy isn’t just for show. Today, Mesker still builds in America, with their main production hub in Huntsville, Alabama.
They focus on commercial, industrial, and institutional construction markets, and they’re especially known for their performance doors—storm-rated, high-security, and energy-efficient.
Mesker is the anchor of the broader Mesker Openings Group, which includes Design Hardware and Hollow Metal Xpress (HMX). That means they can cover you whether you need full-spec solutions or just need doors fast.
- Address: 9301 Meridian Way, Huntsville, Alabama 35811, USA
- Website: www.meskerdoor.com
- Year Established: 1864
Product Portfolio
- N-Series Doors: This non-handed, universal model gives installers flexibility without sacrificing strength. It’s great for large-scale projects with mixed orientations.
- ST-Series: Steel-stiffened and made for abuse. These are the doors you want in schools, hospitals, or any place that takes a beating.
- NVS Seamless Doors: These smooth-edge doors look clean and are easier to sanitize. Perfect for healthcare or modern office interiors where aesthetics and hygiene matter.
- Frames: Whether it’s the F-Series for masonry or the FDJ-Series for drywall, their frames are built to match real job site conditions. They also offer adjustable jamb and remodel frames to save time during retrofits.
- Storm Products: Their hurricane-resistant lineup is impressive, with multiple FBC and Miami-Dade NOA approvals. You’ll find solutions here that meet strict HVHZ codes and work for storefronts too.
- Tornado & Safe Room Assemblies: These are fully certified systems for shelter spaces. Ideal for schools or government projects in storm-prone areas.
- BR-Series Bullet-Resistant Assemblies: Certified to UL 752 Level 3, these doors stand up to serious threats, including rifle rounds.
- NU-Series: For energy savings, this line features a urethane core to reduce heat transfer.
- NF-Series: Designed to limit temperature rise in a fire, these doors can help prevent heat spread and buy valuable time.
Services
Mesker knows speed matters. If you’re facing a tight deadline, their Mesker Xpress service and HMX brand are designed to get doors out the door fast, even if you need light modifications.
They also make life easier when it comes to specs and install. Their online portal is packed with data manuals, pricing tools, and install guides. No gatekeeping, no guessing. Whether you’re bidding, building, or managing, they’ve got what you need right at your fingertips.
Certifications & Standards Compliance
- Industry & Quality: Fully compliant with SDI, ANSI, and ASTM standards. All products support Buy American provisions.
- Fire & Life Safety: Their doors are tested for up to 3-hour ratings and meet UL 10B and UL 10C. Bullet-resistant products come with a UL 752 Level 3 Certificate.
- Severe Weather: Their catalog of FBC and Miami-Dade NOA approvals is one of the largest out there. Doors are tested for HVHZ and come in multiple configurations—single, double, and glazed.
- Sustainability: Mesker’s offerings can support LEED credits, helping teams meet green building goals with ease.
Bottom Line
Mesker brings unmatched legacy, strong performance products, and quick-turn options under one roof. Their lineup is especially strong in weather-rated and security-first applications. But if your priority is custom architectural aesthetics or boutique design, their catalog might feel more functional than flashy.
5. Gensteel Doors
Company Overview
If you want a hollow metal door that doesn’t just meet expectations but crushes them, Gensteel is worth a serious look. Since 1969, this Canadian brand has carved out a reputation for making doors that are, quite literally, “Tough to the core™.”
Their focus on quality, prompt delivery, and rust resistance has made them a favorite in both the U.S. and Canada. Their HQ is in Saint-Laurent, Quebec, with additional plants in Ontario and New York—giving them solid geographic coverage across North America.
Gensteel is all about durability. They use galvannealed steel as their standard, which means every door they make has built-in corrosion resistance, no upgrades required.
- Address: 2105 Hymus Blvd, Saint-Laurent, Quebec H4S 1E9, Canada
- Website: www.gensteeldoors.com
- Year Established: 1969
Product Portfolio
- GenBuilt™ Series: Their flagship line of standard hollow metal doors. Available in all major gauges and with core options like honeycomb, polystyrene, and polyurethane. Stainless steel versions are available too.
- GenGuard™ Series: Built for high-abuse environments, these doors are steel-stiffened and extra rigid—ideal for schools, correctional facilities, or anywhere that sees daily wear and tear.
- GenBossed™ Series: A six-panel embossed design gives you a classic, upscale look while keeping the full strength of steel. Fire-rated up to 3 hours.
- GenFrame™ Series: Their line of drywall and masonry frames, “QuickFit certified” for easier assembly and installation. Available in various profiles and steel gauges.
- GenStorm™ Series: Designed for hurricane zones, these doors pass the Florida Building Code’s TAS 201–203 tests. They’re Miami-Dade NOA approved and ready for HVHZ regions.
- GenShield™ Series: Temperature rise doors built to slow down the spread of heat during fires—critical in stairwells and fire escape routes.
- Lead-Lined Doors: Ideal for x-ray rooms and medical settings, offering radiation protection with compliance built in.
Services
Gensteel makes it easy to trust them with your project. Their 10-year warranty against rust perforation and delamination is one of the best in the industry. They’re known for quick lead times and delivering exactly what they promise.
Whether it’s for a hotel renovation or a stadium build, their reputation for reliability and prompt service keeps project managers coming back.
Certifications & Standards Compliance
- Industry & Quality: Built to ANSI A250.8 and A115 standards. Their finishes meet AAMA powder coating guidelines for durability.
- Fire & Life Safety: Intertek (Warnock Hersey) and UL certified up to 3-hour fire ratings. Tested to ASTM E-152 and NFPA 252.
- Severe Weather: Multiple Miami-Dade NOAs and full compliance with TAS 201, 202, and 203 test protocols for HVHZ installations.
- Sustainability: While not their biggest emphasis, their durable steel construction and long lifecycle contribute to green building goals.
Bottom Line
Gensteel delivers rugged, storm-ready, and code-compliant doors that can stand up to just about anything—without sacrificing looks or flexibility. Their customer-first service and warranty are hard to beat. That said, if your project is strictly price-driven or needs mass-market availability, their premium quality might not be the lowest-cost option.
6. Trudoor
Company Overview
When you’re juggling brands, specs, and deadlines, sometimes what you really need is one reliable source to bring it all together. That’s exactly the role Trudoor plays. Headquartered in Boston, Massachusetts, Trudoor isn’t a manufacturer, they’re a national distributor with access to just about every major hollow metal door brand in the U.S.
They work with everyone from large general contractors to local handymen and pride themselves on being flexible, knowledgeable, and easy to work with.
Instead of locking you into one brand’s catalog, Trudoor gives you access to nine of the twelve SDI-certified manufacturers, including big names like Steelcraft, Curries, and Mesker. That makes them one of the most versatile players in the Division 8 space.
- Address: 109 State Street, Boston, Massachusetts 02109, USA
- Website: www.trudoor.com
- Year Established: Not publicly listed (operational as a national distributor for over a decade)
Product Portfolio
- Standard Hollow Metal Doors: Their go-to is an 18-gauge, SDI Level 2 heavy-duty steel door, typically filled with a honeycomb or polystyrene core—solid, simple, and code-compliant.
- Custom and Specialty Doors: Because they’re brand-agnostic, they can source Dutch doors, fire-rated vision-lite doors, and stainless steel models. They even offer GRAINTECH™ wood-look steel doors, which are great for when you want steel durability with a warmer aesthetic.
- Steel-Stiffened and Acoustic Options: For high-abuse or sound-sensitive spaces, they offer reinforced doors with internal steel stiffeners and options prepped for acoustic performance.
- Frames and Hardware: Full-frame solutions for masonry or drywall openings, plus a wide selection of commercial hardware to match—hinges, locks, closers, and everything in between.
Services
What sets Trudoor apart is how much more than “just a supplier” they are. Their team includes real pros—people who’ve worked on job sites and understand fire codes, spec issues, and retrofits. You’re not talking to a call center—you’re talking to someone who gets the job from your side of the table.
They also offer an intuitive online quote-building tool, making it simple to price out commercial assemblies. But the real standout? Their UL and Intertek-certified fire-label shop. That means they can modify a fire-rated door—cut in a lite, prep it for hardware—and re-label it, all in-house. No factory delay, no red tape.
Certifications & Standards Compliance
- Business Standards: They’re a BBB-accredited business with an A+ rating and a proud corporate member of the Door and Hardware Institute (DHI), reinforcing their professional integrity.
- Product Integrity: They only distribute SDI-compliant, American-made doors. So whether you order a door from Curries or Ceco, you get all the performance ratings and testing that come with those manufacturers.
- Fire-Rated Modification Authority: This is a big one. Trudoor’s shop is UL and Intertek-certified to modify and re-label fire-rated doors and frames. These inspections are rigorous and ongoing—ensuring your modified doors still meet all life safety codes.
Bottom Line
Trudoor offers unmatched access to trusted brands, backed by deep product knowledge and real-life job site experience. Their fire-rated modification service is a huge win for anyone needing custom openings fast. That said, if your project requires a single-brand spec or you’re working internationally, their multi-brand U.S.-focused model might not be the best fit.
7. Hörmann Group
Company Overview
Sometimes you need to zoom out and see who’s dominating the market beyond North America—and that’s where Hörmann Group enters the picture. Founded and headquartered in Steinhagen, Germany, Hörmann is a family-owned global heavyweight in the door industry. Their products are known for that signature German blend of engineering precision and quality.
While they aren’t as widely seen in U.S. hollow metal door projects, their presence worldwide is massive—and growing.
What makes them stand out is their integrated approach. Hörmann doesn’t just sell doors—they deliver complete systems that include frames, hardware, and automatic operators, all designed to work together seamlessly.
- Address: Upheider Weg 94–98, 33803 Steinhagen, Germany
- Website: https://www.hoermann.com/en/
- Year Established: 1935
Product Portfolio
- Multi-Purpose Steel Doors: These are the workhorses—durable and functional for schools, warehouses, and commercial buildings needing solid performance without over-specification.
- High-Security Steel Doors: Designed for facilities requiring enhanced intrusion resistance, including data centers, correctional buildings, and government sites.
- Internal Steel Doors: Ideal for industrial plants and large buildings, these are built to last and integrate well with other automated solutions.
- Complete Door Systems: Hörmann’s strength is bundling. Instead of sourcing frames and hardware separately, you can get fully matched, pre-engineered door systems that install quickly and meet all spec requirements.
- Beyond Hollow Metal: They also offer sectional doors, high-speed roll-ups, dock levelers, and even garage doors—giving them a wide commercial and residential footprint.
Services
Hörmann doesn’t treat doors like standalone parts—they treat them as engineered systems. Their services start with design consultation and carry through to professional installation, maintenance programs, and responsive repair support.
If you’re managing a facility where uptime matters, like a distribution center or manufacturing line, this end-to-end model can really save headaches down the line. They’re focused on delivering performance, not just product.
Certifications & Standards Compliance
- European Standards: Hörmann products meet all key EN requirements, such as EN 1634 for fire resistance and EN 14351-1 for door performance. They’re CE marked, meaning they pass EU-wide health, safety, and environmental standards.
- ISO Certification: The company holds ISO 9001 for quality management and ISO 14001 for environmental stewardship—both of which are key for international procurement standards.
- Global Readiness: If you’re managing cross-border or EU-based projects, these certifications offer the clarity and consistency needed to stay compliant.
Bottom Line
Hörmann offers global-scale door solutions with precision German engineering and complete system integration. Their products are ideal for teams looking to streamline performance, compatibility, and installation under one brand. That said, if your project is U.S.-based and needs fast local fulfillment or deep customization, their limited North American footprint might require additional coordination.
Conclusion
We got that job back on track, eventually. But it costs us time, money, and trust.
I built this list so you don’t go through the same mess. Now you know who delivers, who listens, and who’s worth calling again.
This article is your shortcut to reliable hollow metal door suppliers, no guesswork needed.
And if you’re looking for one name that checks every box, contact us today. Vallisco is here to make your next order simple and stress-free.
