Wood & Glass Double Entry Doors | Factory Direct Manufacturer

13 min read

The first thing a buyer notices on a villa elevation is the entry. Not the landscaping, not the roofline. The door. When that door spans six feet wide with glass panels letting morning light cut across a marble foyer, the entire structure reads differently. But here is what most architects discover too late: a double door with glass is not simply a bigger single door. It is an engineering problem.

We are Jusen Door and Windows Manufacturing Co., Ltd. We have spent over a decade building these units on our factory floor in China, shipping them to projects across North America, Europe, and the Middle East. This guide explains what goes into a properly engineered wood and glass double entry door — the material science, the glass technology, the hardware, and the quality checks that separate a door that lasts twenty years from one that sags within three.

Why Choose a Double Door Configuration? The Engineering Advantage

A double door is a statement of scale. It provides a wider clear opening for moving furniture, creates a ceremonial entrance, and allows architects to play with proportions that a single leaf simply cannot achieve. The engineering consequences, however, are immediate. A double door has twice the perimeter of a single door, which means twice the sealing challenges. It has a center meeting stile where two leaves must align perfectly. And when you add glass — heavy glass — the structural loads multiply.

Structural Support for Heavy Glass Loads

Tempered glass weighs roughly 2.5 kg per square meter per millimeter of thickness. A typical double entry door with two 10mm glass panels, each measuring 800mm by 2200mm, carries approximately 44 kg of glass per leaf. That is significant weight hanging from hinges attached to wood frames.

Our factory addresses this with reinforced aluminum sub-frames embedded within the wood structure at the hinge points and along the glass rebates. This is not visible from the exterior — the wood veneer covers the aluminum entirely — but it prevents the door from sagging over years of use. We learned this through trial, not theory. Early prototypes without internal reinforcement showed measurable deflection after eighteen months of simulated use in our test facility. The aluminum inserts solved it. [1]

Air-Tightness in a Larger Span

Sealing a double door is fundamentally different from sealing a single door. The center gap between the leaves is the weak point. Air infiltration here leads to energy loss, dust ingress, and noise transmission. Our double doors use a three-point multipoint locking system that pulls both leaves tight against a central astragal. The astragal itself features dual EPDM gaskets — one facing each leaf.

Before any shipment leaves our factory, every double door unit undergoes our strict pre-shipment air-tightness and water-tightness tests. We measure air leakage at 600 Pa pressure differential. The results must fall within the performance class we promised the client, not just within “acceptable” industry ranges. When a door has a larger perimeter, these tests matter more, not less. [2]

Customization of Proportions

Standard double doors come in set widths — 1200mm, 1500mm, 1800mm total. But architectural drawings rarely respect standard sizes. This is where our full customization on size becomes relevant. We can manufacture double doors up to 2400mm total width and 3000mm height, provided the structural engineering review approves the glass thickness and hinge configuration.

For a recent project in Dubai, we produced double doors at 2200mm width with a fixed sidelight on one side, matching the exact opening dimensions of a custom villa design. The aluminum reinforcement had to be redesigned for that specific span. Our engineering team ran the load calculations in-house and adjusted the internal frame structure accordingly. This is not something a distributor or middleman can offer — it requires direct access to the factory’s technical team.

Wood Type Selection: Solid Hardwood vs. Engineered Wood

The wood species and construction method determine both the aesthetic and the longevity of the door. B2B buyers must understand the trade-offs, because the decision affects warranty claims and client satisfaction years down the line.

The Allure of Solid Wood (Sapele, Oak, Meranti)

Solid wood doors carry a weight and texture that cannot be replicated. Sapele, with its rich reddish-brown tone and interlocked grain, is our most requested species for luxury villa projects. Oak offers a lighter, more contemporary look. Meranti provides a cost-effective alternative with decent stability.

We source our solid lumber from certified suppliers and kiln-dry it to a moisture content of 10-12% before machining. This is critical. Wood that enters the production process with excess moisture will warp or crack after installation, especially in climates with significant seasonal humidity swings. Our experience in the solid wood doors industry has taught us that moisture control at the raw material stage is the single most important factor in preventing field failures. [3]

Engineered Wood for Stability

Here is where I will be direct: solid wood is not always the right choice. For projects in coastal areas or regions with high humidity, engineered wood — specifically laminated veneer lumber (LVL) or multi-layer plywood cores faced with a wood veneer — offers superior dimensional stability.

An engineered core does not expand and contract as aggressively as solid wood. This means the door maintains its fit within the frame, the glass seals remain compressed, and the multipoint locks continue to engage smoothly. The trade-off is a slightly less “premium” feel when knocking on the door, but the performance benefit is substantial.

Our adjustable profile structure allows us to adapt the door construction based on the target market. For a project in Florida, we would recommend an engineered core with a moisture-resistant adhesive. For a project in Colorado, solid wood is perfectly viable. We are not locked into one construction method — we build what the climate demands. [4]

The Jusen Finishing Process

A wood door’s finish is its first line of defense against UV radiation, moisture, and physical wear. Our factory operates a dedicated painting line where doors receive multiple coats of UV-resistant, waterproof stain or paint.

For exterior double doors, we typically apply a two-component polyurethane primer followed by two top coats. Each coat is sanded between applications to ensure proper adhesion and a smooth final surface. This is a labor-intensive process, but it is the difference between a door that looks good for two years and one that looks good for fifteen.

Because we control the finishing in-house, we can match specific RAL colors or custom wood stains for large construction project bulk supply orders. Consistency across dozens or hundreds of units is guaranteed by the same line, the same operators, and the same batch of finishing materials. A distributor cannot offer this level of control.

Glass Technology for Entry Doors: Safety and Insulation

The glass component is where many double entry doors fail. Thermal performance, safety ratings, and acoustic insulation all depend on correct glass specification and proper installation into the door frame.

Double Glazing and Low-E Coatings

Single-glazed glass in an entry door is a thermal disaster. It creates a cold surface that condenses moisture in winter and allows heat gain in summer. Our standard recommendation for exterior double entry doors is double-glazed units with Low-E coatings.

The Low-E coating reflects infrared radiation while allowing visible light to pass. Combined with a 12mm or 16mm argon-filled cavity, this achieves U-values below 2.0 W/m²K — comparable to a modestly performing window. Our thermal-break aluminum doors and windows division has extensive experience with energy-efficient glazing, and we apply the same principles to our wood-glass entry doors. The glass supplier we use is certified and provides test certificates for every batch of insulated glass units. [5]

Tempered vs. Laminated Safety Glass

Safety glass is not optional for entry doors. Building codes across most jurisdictions require tempered or laminated glass in doors due to the risk of human impact.

Tempered glass is four to five times stronger than annealed glass and, when broken, shatters into small granular pieces rather than sharp shards. Laminated glass, on the other hand, consists of two glass layers bonded with a PVB interlayer. When broken, it stays in place, held together by the interlayer.

For hurricane-prone regions or high-security applications, we recommend laminated glass. For standard residential use, tempered glass is typically sufficient. We offer full customization on glass type, including tinted glass, frosted glass, or decorative patterns. The glass specification is matched to the project’s location and security requirements — not to whatever glass is cheapest that week.

Hardware Integration for Heavy Glass

Heavy glass panels require heavy-duty hardware. Standard residential hinges are not sufficient for a door leaf that weighs 60 or 70 kg with double glazing. We use stainless steel ball-bearing hinges rated for the specific door weight, and we adjust the hinge count based on the final weight calculation.

Multipoint locking systems, typically with three or five locking points, are standard on our double doors. The central meeting stile uses a shootbolt mechanism that extends into the top and bottom frame sections, providing security at all points rather than just at the handle. Our full customization on hardware accessories means we can install specific brands — whether the client specifies a European lock brand or a particular handle design.

The Manufacturing Process: From Raw Lumber to Finished Product

Buyers who have only worked with distributors often do not realize what happens inside a factory. This section gives you a look at our production process — and why it matters for your project.

Precision Machining and Joinery

Our CNC machining centers cut the wood components for each door with a tolerance of ±0.5mm. Mortise and tenon joints are cut with precision, ensuring a strong mechanical connection between the stiles and rails. We use waterproof PVA adhesive for all joints, and the assembled frames are clamped under pressure until the adhesive cures.

Being a direct supply factory means we control this process entirely. We do not outsource the joinery or the assembly. This gives us tighter tolerances than a supplier who coordinates between multiple subcontractors. If a joint is not perfect, we catch it during our quality checks — not after the door has been installed on site.

Quality Control Checkpoints

Our quality control process involves multiple checkpoints throughout production. First, the raw lumber is checked for moisture content and defects. Second, the assembled frame is checked for squareness and dimensional accuracy. Third, the glass is inspected for chips, scratches, or inclusions. Fourth, the finished door undergoes a final inspection where we test the hardware operation, check the seal compression, and verify the finish quality.

Every batch of double doors undergoes our strict pre-shipment inspection, which includes air-tightness, water-tightness, and wind resistance tests. We test to the performance standard specified for the project — not to a generic “good enough” benchmark. If a door fails, it does not ship. [2]

Packaging for Export

Damage during shipping is a common pain point for B2B buyers. A scratched door or a cracked glass panel means delays, rework, and frustrated clients. Our export packaging is designed to prevent this.

Each door is wrapped in a protective foam layer, then placed in a plywood crate with internal bracing. The glass panels are additionally protected with edge guards. For FCL shipments, the crates are loaded into the container with proper blocking and bracing to prevent movement during transit. For LCL shipments, we use reinforced crates that can withstand the additional handling involved in consolidated shipping.

Customization and OEM/ODM Services for B2B Clients

Your company may need doors that match your own product line, or you may have specific designs that you want manufactured to your specifications. This is where our OEM and ODM services come in.

Your Designs, Our Manufacturing

If you have a CAD drawing or a design patent, our engineering team can evaluate the design for manufacturability and produce it. We work with clients who have their own door designs, providing the manufacturing capability they lack in-house. This includes advising on material selection, glass specification, and hardware choices based on our experience.

We have also developed our own product line of wood and glass double entry doors, which can be customized to a client’s specific size, finish, and hardware requirements. Whether you choose an existing design or provide your own, the result is a product that carries your brand, not ours.

Color Matching and Hardware Branding

Our finishing line can match any RAL color or wood stain. If you have a specific color standard for your projects, we will match it. We can also install specific hardware brands — if your clients prefer a particular European hinge or lock system, we will source and install it. For private label orders, we can apply your logo to the door and the packaging.

Documentation and Compliance

Importing doors from China involves paperwork. Our rich experience in foreign trade means we handle this efficiently. We provide a packing list, proforma invoice, bill of lading, and any other required customs documents. We understand the documentation requirements for different countries and ensure your shipment clears customs without unnecessary delays.

Logistics, Lead Times, and Project Management

Reliability in delivery is as important as product quality. A door that arrives late can delay an entire construction project, costing far more than the door itself.

Volume Production Capacity

Our factory operates multiple production lines, allowing us to handle both small custom orders and large-scale villa projects. Our direct factory pricing — without middleman markup — is possible because we control the entire production process. For B2B clients ordering in volume, this translates to a significant cost advantage.

Shipping Solutions (FCL vs. LCL)

Depending on your order volume, we can ship via full container load (FCL) or less than container load (LCL). For large projects, FCL is typically more cost-effective per unit. For smaller orders or sample orders, LCL allows you to order without committing to a full container. Our team can advise on the most cost-effective shipping method based on your order size and project timeline.

Lead Time Transparency

Production times vary based on customization level. A standard double door with standard glass and hardware can be produced in approximately 3-4 weeks. Custom sizes, custom finishes, or special glass specifications may require 5-8 weeks. We provide realistic lead time estimates upfront and keep you updated throughout the production process. We do not promise what we cannot deliver.

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Frequently Asked Questions

What is the maximum size you can manufacture for a wood and glass double entry door?

We can manufacture double doors up to 2400mm total width and 3000mm height. For oversized panels, we use reinforced aluminum inserts within the wood structure to maintain stability. The final size is subject to an engineering review that considers glass weight, hinge capacity, and wind load requirements for the project location.

Can you match the wood finish to our specific project requirements?

Yes. Our dedicated painting line can match any RAL color or specific wood grain stain. We also support OEM and ODM projects for unique textures or finishes. For bulk orders, we guarantee finish consistency across all units.

How do you ensure the doors are watertight, especially with the glass component?

We use EPDM gaskets around the glass panels and structural silicone to seal the glass to the frame. The door perimeter uses a compression seal system that engages when the multipoint locks are closed. Every batch of double doors undergoes our strict pre-shipment inspection for water-tightness and air-tightness before leaving our factory.

Do you provide all necessary export documents for customs clearance?

Absolutely. We have rich experience in foreign trade and provide a packing list, proforma invoice, bill of lading, and any other required certificates. We handle the documentation to ensure your shipment clears customs without delay.

What is the MOQ for a bulk order of these doors?

We are flexible on MOQ. We offer both FCL and LCL shipment, so we can support both small projects and large-scale developments. The MOQ depends on the specific model and customization level. Contact our team to discuss your specific volume requirements.

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The Choice Is Yours

Choose a solid wood double entry door if your project demands the premium feel and natural texture of real wood, and the climate is relatively stable. Choose an engineered wood double entry door if your project is in a high-humidity or coastal area where dimensional stability is the priority. Choose laminated glass if security or hurricane resistance is a concern. Choose tempered glass for standard residential applications.

The right choice depends on your project’s specific requirements. Our role is to build the door that meets those requirements — not to push you toward a particular option. That is the difference between working with a factory and working with a salesperson.

When you are ready to discuss your project, our team is available to review your drawings, provide technical recommendations, and deliver a detailed quote.

Get a Free Quote

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References

[1] Glass Association of North America. “GANA Glazing Manual.” https://www.glasswebsite.com/

[2] American Architectural Manufacturers Association. “AAMA/WDMA/CSA 101/I.S.2/A440-17, North American Fenestration Standard.” https://aamanet.org/

[3] Wood Products Council. “Wood Handbook: Wood as an Engineering Material.” https://www.woodworks.org/

[4] Engineered Wood Association. “APA Engineered Wood Handbook.” https://www.apawood.org/

[5] Efficient Windows Collaborative. “Low-E Coatings.” https://www.efficientwindows.org/