We once received doors that looked great in photos but chipped within months after install. That kind of supplier mistake costs your reputation, not just money.
I’ve been careful about solid door vendors ever since.
You deserve clear, real-world insight before making a call. I’ve worked with procurement and site teams across hotels, offices, and public spaces to find out who’s consistent and who’s not.
This review covers 8 solid door suppliers you should know. You’ll get highlights, use cases, and a heads-up on anything to watch for.
Your next project deserves fewer headaches.
Let’s jump into it!
Quick Comparison
Before we go deeper, take a look at this. I’ve summarized the essentials so you can start forming your shortlist right now, without getting lost in the weeds.
| Manufacturer | Established | Main Location | Products Include | Custom Options | Ideal For | Not Ideal For |
| Therma-Tru | 1962 | Ohio, USA | Fiberglass, steel, solid core | Fire ratings, smart kits | High-volume builds, U.S. projects | Heavy woodgrain detail |
| Valo | N/A | South Carolina, USA | Thermal aluminum, slide, hinged | Precision sizing, finishes | Modern hotels, energy codes | Custom wood textures |
| Vallisco | 2024 | Shanghai, China | Pivot, sliding, fire-rated | CE ready, curved options | Export projects, villas, commercial | Ornate home doors |
| KKD | 2007 | Zhejiang, China | Steel, MDF, villa doors | Locks, sizes, decoration | Large bulk orders, hotels | Artisan finishes, fast local stock |
| Simto | 1998 | Zhejiang, China | Armored, hotel, utility doors | Fire/acoustic upgrades | Bulk exports, consistent specs | Western wood styles |
| Masonite | 1925 | Florida, USA | Flush, fire-rated, fiberglass | Veneers, cores, framing | Multi-site sourcing, North America | Small custom runs |
| Woodgrain | 1985 | Idaho, USA | Hardwood, MDF, exterior | Wood types, panel layout | Builders, local distribution | Sculpted luxury doors |
| Zonle | 2001 | Guangxi, China | Steel, WPC, solid wood | Mix material, size range | Mixed-use jobs, fast production | Handcrafted woodwork |
Alright! Now let’s walk through each supplier in detail so you can see what really sets them apart.
1. Therma-Tru Doors
Therma-Tru Doors was established in 1962 and operates out of Maumee, Ohio, USA. They are recognized as one of the earliest innovators in fiberglass door technology and now run under the umbrella of Fortune Brands Innovations. Their products serve both residential and light commercial markets through an extensive dealer network.
What stood out to me is how consistent they’ve been over the years. Even on jobs I wasn’t directly involved in, teams often request Therma-Tru when they want a known quantity. You and your team will likely find confidence in their long-standing presence, third-party certifications, and steady support services.
Product
- Pulse® Modern Doors: These doors feature geometric glass layouts and clean lines for design-forward builds. Perfect for modern hotels or loft-style offices.
- Steel Utility Doors: Made for side or service access, these doors offer strong performance with optional fire ratings. Their simple look hides solid specs.
- Classic Craft® Solid Doors: A fiberglass alternative to traditional wood that holds up in wet, humid, or heavily used environments. Ideal for main entrances or shared hallway access.
- Smooth-Star® Fire Doors: These paintable fiberglass doors are available with fire ratings up to 20 minutes. A smart pick for unit entries or shared corridors.
- Multi-Panel Patio Doors: These wide-opening doors combine solid and glazed sections. Commonly used for access to shared decks or event areas.
Customization Options
- Smart Component Matching: Frames, sills, and doors are designed as a system, so you don’t have to mix brands. This helps prevent long-term fit issues.
- Custom Fire Ratings: Many solid models can be upgraded to meet code requirements without swapping out core components. Useful for hotel or apartment projects.
- Pre-Assembled Units: Doors can be shipped with jambs, hinges, and weatherstripping already installed. That reduces on-site prep for small teams.
- Tinted and Textured Glass Options: Beyond standard privacy glass, you can select bronze, gray, or rain-textured inserts. Helps with glare and appearance.
- Threshold Selections: Adjustable or ADA-compliant thresholds are available. Handy when your job needs to pass inspection the first time.
Contact Info
- Website: thermatru.com
- Location: Maumee, Ohio, USA
- Phone: 1-800-843-7628
Final Thoughts
Therma-Tru performs well for large-scale projects where code compliance, longevity, and support really matter. But if your focus is on custom millwork, deep woodgrain visuals, or boutique craftsmanship, you may find their look and feel a bit too standardized.
2. Valo Windows and Doors
Valo Windows and Doors is based in Greenville, South Carolina and specializes in thermally broken aluminum windows and doors. While the company doesn’t list its founding date publicly, it operates with a strong U.S. base and offers a 20-year product warranty. Their energy-rated units include Low-E glass and argon fill as standard.
What impressed me most is how detail-oriented their team seems, everything from sizing down to 1/16″ to offering anodized finishes shows care for the full project lifecycle. They’re not the biggest name in the space, but they deliver like a focused crew that knows their product well.
Product
- Hinged Entry Door: These aluminum solid doors come with thermal breaks and tight gaskets. They’re well-suited for controlled spaces and exterior entries.
- Bifold Doors: Available with solid or glazed panels, these open wide for maximum access. Often used in poolside areas or restaurants needing flexible flow.
- Lift and Slide Doors: Heavy insulated doors that lift before sliding to maintain an airtight seal. Great for large guest patios or high-traffic commercial use.
- Hinged Patio Door: Available in single or double formats, with or without glass inserts. These are often used in side entrances or guest balcony access.
- Fixed Specialty Doors: Designed for non-opening applications like stairwells or service wall features. Can be fully solid or include custom inset panels.
Customization Options
- Precision Sizing: Doors are cut to the nearest 1/16″ to match your framing. That reduces field fitting issues.
- Finish Options: Choose from RAL color powder coats or anodized metal finishes. Both options resist corrosion in humid or coastal areas.
- Glass & Panel Pairings: Combine clear, frosted, or solid inserts. Helpful when designing around privacy, daylight, or branding needs.
- Hardware Selection: Choose European-style handles or U.S. standard locksets. That helps meet both code and client preferences.
- Opening Types: Swing, slide, bifold, or fixed options are available. Good for balancing space, airflow, and function.
Contact Info
- Website: valowindows.com
- Phone: 64-202-6710
- Email: sales@stickssupply.com
- Location: Greenville, South Carolina, USA
Final Thoughts
Valo can do well on jobs where modern looks, thermal performance, and tight tolerances are key. But if your client expects traditional wood finishes or fast local pickups, you may want a supplier with in-stock pre-hung options.
3. Vallisco
Vallisco was introduced as a global brand in 2024, backed by over 15 years of production experience through its Shanghai-based facility. The company focuses on high-performance aluminum windows and doors and holds CE, ISO, and SGS certifications. Their export operations cover Southeast Asia, Europe, and other regions needing thermal and structural compliance.
From what I’ve seen, Vallisco does especially well on international projects that need both flexibility and certification-ready product. They’re organized, responsive, and capable of handling varied order types, whether it’s for villas, hospitality builds, or developer projects.
Product
- Glass + Solid Combo Doors: These combine privacy and daylight by pairing solid panels with fixed glass. A practical choice for villas or shared garden entries.
- Pivot Entry Doors: Large-format doors with quiet-close motion and strong structural performance. Great for modern hotels or statement lobbies.
- Sliding Service Doors: Used in kitchens, event halls, or staff access zones. Solid-core panels glide smoothly along floor tracks.
- Fire-Rated Solid Doors: Built with composite or steel-reinforced cores and certified fire performance. Ideal for corridor or exit doors in commercial settings.
- Hinged Back Entry Doors: Reliable, durable doors for side entries or staff zones. It can be matched with smart locks or simple key systems.
Customization Options
- OEM/ODM Support: You can brand the products or co-develop based on your specs. Useful if you work with private-label clients.
- Multiple Certifications: Products can be pre-configured to meet CE, ISO, or other local building codes. Saves time during inspection and delivery.
- Wide Range of Openings: Offers curved, angled, or oversized configurations. Helpful when designing for villas or custom commercial buildings.
- Surface Finishes: Choose from matte, metallic, or wood-grain effects in powder-coated or anodized options. Gives more control over design feel.
- Smart Lock Integration: RFID, fingerprint, or keypad-ready systems available. Especially practical in hotel or access-controlled environments.
Contact Info
- Website: vallisco.com
- Phone: +86 18502136587
- Email: kelly@vallisco.com
- Location: Jiading District, Shanghai, China
Final Thoughts
Vallisco is a strong fit for export-driven builds where flexibility, compliance, and reliable supply matter more than traditional detailing. But if you’re looking for a single ornate door just for a home or a more handcrafted aesthetic, their catalog may lean too modern and scaled for that.
4. KKD Group
KKD Group was founded in 2007 and is based in Yongkang, Zhejiang Province, China. They operate six production bases with a team of over 1,500 employees and a daily output of around 5,000 doors. The company holds ISO 9001, ISO 14001, CE, and SONCAP certifications, along with over 100 national patents.
I’ve heard from several contacts that KKD is often chosen for projects needing consistent quality at high volume. Your team might find their combination of in-house design, stable lead times, and broad door options especially helpful.
Product
- Armored Steel Entry Doors: These solid steel doors include reinforced cores and multi-point locking. They’re built for security-sensitive areas in hospitality and institutional buildings.
- MDF Solid Wood Doors: Painted or veneered solid doors that provide good insulation and aesthetics. Suited for hotel rooms, villas, and internal corridors.
- Fire-Rated Security Doors: Steel-framed solid doors rated up to 90 minutes. Often used in service areas, corridors, or technical zones.
- Hardware-Ready Villa Doors: Solid wood core doors finished with decorative skins and prepped for modern locks. Common in luxury B&B or villa applications.
- PVC Door Panels: Economical solid-panel doors made from PVC composite. Good for back-of-house or utility spaces where budget matters.
Customization Options
- Material Thickness Choices: Offers door leaf thickness from 50mm to 100mm, depending on insulation or security needs. That helps balance cost and performance.
- Surface Decoration: Options include powder coated steel, heat-transfer wood grain, MDF veneer, and painted finishes. These let you match design themes or branding.
- Lock and Hinge Configurations: Products can be prepared for ABC locksets or European multi-point latches. It ensures compatibility with your security spec.
- Fire and Acoustic Rating Upgrades: Many models can be configured to meet both sound and fire-code requirements. Useful for corridor transitions or guest unit entrances.
- Modular Panel Sizes: Available in standard widths and custom dimensions, with options for double leaves or matched side panels. Helps when coordinating with architectural openings.
Contact Info
- Website: kkddoors.com
- Phone: +86 138 5890 3277
- Email: sales@kkdgroup.com
- Location: Yongkang City, Zhejiang Province, China
Final Thoughts
KKD excels when bulk output, consistency, and broad product range matter for large-scale or international projects. Yet if your job demands premium Western wood finishes or locally stocked inventory, you may find KKD’s aesthetic or lead times less aligned.
5. Simto Door
I came across Simto while reviewing supplier options for a mixed-use hotel project, what stood out was how they manage both volume and flexibility without losing consistency.
Simto Door was established in 1998 and is headquartered in Yongkang, Zhejiang Province, China. With more than 3,000 employees and six automated production lines, the company produces over 5,000 doors daily. They hold certifications like ISO 9001, ISO 14001, and CE, and their products are exported to over 50 countries worldwide.
Product
- Steel Armored Door: A solid-core steel entry with reinforcement and multi-point locking. Ideal for service zones or security-focused entries.
- Fire-Rated Solid Door: Certified for up to two hours, these solid doors meet high safety standards. Used often in corridors or staff-access areas.
- Solid Wood Core Hotel Door: MDF or veneered doors with solid cores and paint-grade finishes. Perfect for hotel rooms, villas, and guest corridors.
- Garage and Utility Doors: Heavy-duty solid or composite doors for back-of-house applications. Built to handle frequent use and exposure.
- Pivot Style Entrance Door: Modern pivot doors with solid panels or mixed glazing. Adds visual impact at lobbies or villa entrances.
Customization Options
- Variable Door Thickness: Offers options from 50 mm up to 100 mm, depending on insulation or security specs. Helps balance performance and cost.
- Finish Treatments: Includes powder coated steel, heat-transfer woodgrain, veneer, or lacquer finishes. Helps maintain brand or design consistency.
- Hardware Compatibility: Doors can be prepped for European multi-point locks or standard U.S. fitments. Useful for integrating security hardware.
- Acoustic and Fire Upgrades: Many models can be rated for both sound insulation and fire protection. Supports hotel and corridor spec projects.
- Panel and Leaf Options: Offers single, double, or paired doors with side panels. Helps in matching door sets across long corridors or villas.
Contact Info
- Website: https://www.simtodoor.com/
- Phone: +86 186 5719 8515
- Email: silver@simtogroup.com
- Location: Yongkang City, Zhejiang Province, China
Final Thoughts
Simto Door can offer strong value for projects requiring bulk delivery of certified solid and armored doors across international locations. However, if your project needs high-end western-style wood finishes or locally stocked inventories, a more regionally based supplier may be preferable.
6. Masonite
Masonite International was founded in 1925 and is headquartered in Tampa, Florida, USA. With more than 10,000 employees and over 60 manufacturing and distribution facilities worldwide, the company serves customers across North America, Europe, and Asia. Their certifications include FSC and Indoor Advantage™ Gold for low-emitting materials.
I’ve been following Masonite’s evolution for a while, especially how they’ve expanded their catalog without losing consistency. Their structure supports a smooth experience from specification to delivery, something that matters when juggling timelines and suppliers.
Product
- Flush Wood-Core Interior Door: These solid-core doors offer smooth surfaces and core stability for guest rooms, back offices, or hallway transitions. Often selected for mid-range hospitality and multi-family builds.
- Steel Entry Door: A heavy-duty solution with a solid internal core and reinforced edge details. Commonly used in service entries or external utility zones.
- Stile and Rail Interior Door: Combines design flexibility with solid structure, often featuring raised or flat panels. Works well in villas or office reception areas.
- Fiberglass Exterior Door: Designed for moisture-heavy environments, these doors hold up in tough climates. Ideal for seaside resorts or garden entries.
- Fire-Rated Swing Door: Includes solid wood or mineral cores with up to 60-minute ratings. Used in internal corridors, stairwells, or unit entrances.
Customization Options
- Decorative Veneer Options: Choose from real wood, reconstituted veneers, or high-pressure laminates. This helps match the door to your project’s visual standards.
- Fire & Acoustic Core Combinations: Many doors can meet both requirements in one unit. Helpful when managing mixed-use layouts or layered zoning needs.
- Hardware Cutout Services: Doors can arrive prepped for specific locksets, hinges, or RFID entry systems. Saves time on-site and aligns with your hardware package.
- Core Construction Options: Available in particleboard, mineral core, or structural composite lumber. You can match the door to both safety and durability needs.
- Sizing & Framing Choices: Offered in standard or custom dimensions with options for transoms or sidelites. Supports both modern and traditional framing setups.
Contact Info
- Website: masonite.com
- Phone: (1-800-663-3667
- Email: helpline@masonite.com
- Location: Tampa, Florida, USA
Final Thoughts
Masonite is a solid option if your project needs scalable sourcing with a full catalog of interior and exterior door systems. However, if you’re working on a small, highly customized project with artisan-level finishes, their production scale may feel a bit too standardized.
7. Woodgrain
Woodgrain Doors started in 1985 as part of the larger Woodgrain family, which dates back to 1954. Based in Nampa, Idaho, they now run over 30 facilities across the U.S. and Chile. Their vertically integrated model, from timber harvesting to final fabrication, gives you a single-source advantage for quality and delivery control.
I’ve worked on residential builds where their doors were chosen specifically for durability and easy sourcing. They’ve built a strong following with builders, distributors, and fabricators who want consistent woodgrain texture, fit, and finish.
Product
- Stile & Rail Hardwood Door: Engineered solid wood doors in species like oak, maple, or fir. These are well suited for upscale villas and boutique hotel interiors.
- Flush Wood-Core Solid Door: Smooth, painted doors built with composite cores for stability and quiet performance. Common in hotel corridors and multi-family units.
- MDF Router Carved Door: A durable solid door that supports detailed decorative profiles. Ideal for meeting specific design standards while keeping costs moderate.
- Glass‑Panel Divider Door: Combines glazed elements with solid sections for daylight control and privacy. Used often between guest areas and public lobbies.
- Exterior Hardwood Entry Door: Solid wood doors treated for weather resistance and structural strength. Great for entrances where visual warmth and durability matter.
Customization Options
- Wide Species Selection: Offers nine wood species plus primed MDF. Helps match architectural style and tannin tolerance.
- Glass Choices: Includes 24 glass options, from clear to obscure Low-E glazing. Useful when shading or daylight control matters.
- Panel and Sticking Configurations: Offers shaker, raised, flat, and planked options. Available in multiple styles and panel layouts.
- Prefinish Services: Available prefinished in factory-applied stain or paint. Reduces on-site labor and helps maintain color consistency.
- Fire and Acoustic Add-ons: Many models can be ordered with core upgrades for both sound control and fire-rating. Great for corridors, units, or utility zones.
Contact Info
- Website: woodgrain.com
- Phone: 888‑585‑0917
- Email: Contact via dealer locator or inquiry form on their site
- Location: Nampa, Idaho, USA; additional facility in Chile
Final Thoughts
Woodgrain suits well projects needing classic wood doors with broad style options and reliable supply. Their scale and vertical integration support consistent quality and shorter lead times. However, if the client needs luxury veneers or richly sculpted wood panels, a smaller custom millworker may offer finer craft detail.
8. Zonle Doors
Zonle Doors was founded in 2001 and is headquartered in Guangxi (with bases also in Sichuan, Hubei, and Shandong), China. The company covers approximately 900,000 m² of production space, employs more than 10,000 workers, and supports over 50 R&D staff.
In global sourcing comparisons, I’ve noticed Zonle stands out for combining scale with speed. Their automated lines and quality-control lab help ensure consistency, even with large-volume or mixed-spec orders.
Product
- Steel Security Door: A solid steel entry door built for anti-theft and fire resistance. Well suited for high-security hotel entrances or service zones.
- Solid Wooden Interior Door: Heavy solid-core wooden or veneer door designed for guest rooms or corridors. Offers both appearance and acoustic separation.
- WPC Waterproof Door: Constructed with wood-plastic composite materials for moist environments. Ideal for bathrooms, greenhouses, or coastal utility spaces.
- Fire-Rated Corridor Door: Certified for fire resistance and often used in exit routes or corridors. Combines solid structure with required protection.
- Steel Pivot Entry Door: Large-scale pivot doors made from steel or aluminum with solid panels. Ideal in modern lobbies or public-access spaces.
Customization Options
- Mixed Door Types: Bluestocking allows solid steel, wood, and WPC doors in one order. Useful for large projects with varied entry applications.
- Surface Treatment Choice: Offers powder-coated, wood-grain heat transfer, brushed stainless, or painted finishes. Supports branded looks or spec compliance.
- Door Thickness Range: Solid doors available in consistent core thickness from 45 mm to over 100 mm. Helps tailor acoustic, fire, or insulation needs.
- Hardware-Friendly Prep: Many units arrive pre-drilled for multipoint locks, RFID or standard locksets. Eases installation in controlled access systems.
- Flexible Size Range: Standard and custom dimensions up to oversized panels, with options for double leaves or sidelites. Works well for villas and hotel entries.
Contact Info
- Website: zonledoors.com
- Phone: +86 10 8657 6888
- Email: sales@zonledoors.com
- Location: Guangxi, China
Final Thoughts
Zonle Doors is best for large-scale projects that need a mix of steel, wood, and WPC doors, all backed by global certifications and fast production. But if you’re after artisan wood finishes or locally handcrafted looks, you might want a smaller, specialized vendor.
Conclusion
Choosing the right solid door supplier is about more than the product. It’s about trust, timing, and long-term value.
We’ve reviewed eight suppliers who deliver on different strengths. If that early story sounded familiar, this guide was built for you.
Don’t risk delays or misfits again. Use this list to help guide your next step.
If you’re looking for a door that balances clean design with reliable performance, choose Vallisco. Contact us today!
