French Door Buying Guide: Styles, Materials & Sizes | Jusen Factory

12 min read

The last time a contractor called us about French doors, he wasn’t asking about the glass. He had already specified that. He wanted to know why the previous batch of doors from another supplier had arrived with swollen stiles and hinges that pulled loose after two months on site. That is the real conversation. French doors look elegant in a brochure. They only stay elegant when the material science and the joinery are correct from the first cut of the timber.

This guide is not a dictionary definition of what a French door is. You know what it is. This is about how to spec them for a project without creating callback nightmares for your installation crew. We are Jusen Doors & Windows Manufacturing Co., Ltd., and we have spent over 20 years processing solid wood and manufacturing aluminum window and door systems in our own workshops. The advice below comes from what we see on our factory floor, not from a marketing desk.

Understanding French Door Styles: From Classic to Contemporary

You need to decide the visual language of the project before you can talk about hinges or glass thickness. A French door is essentially a door with multiple glass lites spanning most of its height. But the framing around that glass changes the entire character of the room or the façade.

The Classic Solid Wood French Door (Interior & Exterior)

For villa projects and heritage-style renovations, solid wood remains the default specification. The deep profiles, the ability to route intricate panel details, and the warmth of the grain are irreplaceable. We build these in our solid wood entry door and interior wooden door lines. When a client wants a specific historical profile—say, a Victorian-era raised panel with a particular ogee curve—our in-house design team draws it up and our CNC routers cut it. We do not outsource this. If you need custom carvings or a specific wood species match for an existing building, we handle that in-house.

Aluminum-Clad & Modern Minimalist French Doors

Modern architecture demands slimmer sightlines. A chunky timber frame looks wrong against a minimalist concrete wall. This is where our aluminum alloy window and door manufacturing workshops come into play. We are not a wood-only factory. We combine wood interiors with aluminum exteriors—the timber provides the aesthetic warmth inside, while the aluminum carries the structural load and protects against weather outside. The aluminum profiles are cut and assembled in our own workshops, which means we control the tolerances for the weather seals. We have seen hybrid doors from other suppliers fail because the two materials expanded at different rates and the seal between them broke. Our engineering team designs the junction points to accommodate that movement.

Multi-Fold vs. Standard Hinged Configurations

A standard French door is two hinged panels. A multi-fold system is a completely different engineering challenge. The hinges have to carry more weight, the track has to be perfectly level, and the folding mechanism needs precise alignment. When you are planning a multi-fold configuration, ask for shop drawings before you commit. Our engineering team provides customized shop drawings within 24 hours of receiving your inquiry. This lets your architect see exactly how the panels will stack and where the weight will be distributed before we cut a single piece of timber. It prevents costly design changes later.

Choosing the Right Material: Wood, Aluminum, or Composite?

Every material choice is a trade-off. Wood looks premium but needs maintenance. Aluminum lasts but can feel cold. Composite tries to do both. Let us break down what we actually do in our factory.

The Warmth and Prestige of Solid Wood

Solid wood French doors are the premium choice for a reason. The grain depth and the tactile feel are unmatched. But wood is a living material. If the moisture content is wrong when the door is manufactured, it will warp, twist, or crack after installation. This is not a hypothetical risk; it is the number one cause of field failures we hear about from partners who sourced elsewhere. Our factory operates its own wood drying workshops. We control the moisture content from the raw lumber stage, bringing it down to the optimal level for your climate zone before we machine it. We have seen what happens when a supplier skips this step—doors that fit perfectly in the factory become impossible to close three months later.

The Durability of Aluminum Frames

Aluminum offers structural rigidity that wood alone cannot match, especially for wide spans. The frames do not rot, they do not swell, and they hold tight tolerances for weatherproofing. We cut and assemble our aluminum frames in our dedicated aluminum processing workshops. The precision of this cutting determines how well the glass unit seals. A poorly cut frame means air leaks and condensation, regardless of how expensive the glass is. Our workshop ensures the mitre joints are tight and the drainage channels are correctly positioned.

The Manufacturer’s Note on “Composite”

Composite is a broad term. In our context, it usually means a wood interior bonded to an aluminum exterior. This is the best of both worlds for exterior applications. You get the warmth of the wood on the inside of the room and the durability of aluminum on the outside. The challenge is that this requires a factory that can handle both materials competently. Because we run both wood and aluminum lines under one roof, we can offer this hybrid solution without the coordination headaches of managing two separate suppliers. We have seen projects where the wood supplier and the aluminum supplier blamed each other for a leaking joint. We own both processes, so we own the problem.

Standard Sizes vs. Custom Dimensions: What You Need to Know

Sizing is where projects get delayed. The difference between a rough opening and the actual door dimensions is a constant source of confusion.

Understanding Rough Openings vs. Door Dimensions

The rough opening is the hole in the wall. The door frame is what fits inside it. You must account for the gap needed for shimming and leveling. A common mistake is ordering a door that is exactly the width of the rough opening. It will not fit. You need to subtract the frame thickness, the expansion gap, and the space for the shims. When you send us your rough opening sizes, our sales team reviews them and flags any potential issues before production. We have 20 years of data on how these measurements fail, and we use that to protect you from your own subs’ mistakes.

The Limits of Customization (What is Actually Feasible?)

“Custom” does not mean “any size is fine.” There are physical limits. A door that is too wide for its hinge placement will sag over time. A door that is too heavy for the glass thickness will put excessive stress on the locking mechanism. We advise our B2B clients on the optimal size-to-weight ratio. We have seen a project where a developer insisted on a 1.2-meter-wide solid oak door. It looked magnificent on day one. By month six, the hinges were creaking and the latch was misaligned. Our engineers would have specified a different hinge configuration or an aluminum reinforcement rib. We tell you this before we cut, not after you complain.

How to Provide Your Door Schedule

For a large project, you will have a door schedule—a spreadsheet or document listing every door, its size, its material, and its hardware requirements. Send this to us directly. Our sales team can review the entire schedule, identify any inconsistencies or impossible specifications, and provide a formal quotation within 24 hours. This is much faster than the industry average, and it keeps your procurement timeline moving. We do this because we have the engineering staff in-house to review the documents quickly, not because we rush the job.

Installation Tips for a Perfect Fit

The best door in the world will fail if it is installed badly. Here is what we tell every contractor who buys from us.

Pre-Installation Checks (The “Jusen” Checklist)

Before you lift the door into place, check the rough opening. Is it square? Is it level? A door is manufactured to be square. If you install a square door into a parallelogram-shaped opening, you will bind the hinges. We pack our products for export with heavy-duty protection and offer shipping damage protection. But even with perfect packing, the door can shift during transit. Your receiving crew should check the frame for squareness and check the sills for any impact damage before they sign for the delivery. We provide a checklist with every shipment. Use it. We have seen crews install a door with a cracked sill because they did not inspect it upon arrival, and then they blamed us for the damage.

Flashing and Weatherproofing

The head of the door is the most vulnerable point for water ingress. You need a proper flashing system that directs water away from the top of the frame. Our experience manufacturing aluminum windows has informed our door sill designs. We integrate sills that work with standard waterproofing membranes. The key point is to ensure the sill has a proper slope to drain water away from the interior, and that the flashing overlaps the side weather-resistant barriers. Do not caulk the bottom of the sill shut; it needs to weep.

Hardware Adjustment and Alignment

Multi-point locking systems are complex. They require precise alignment of the strike plates. If the door is not perfectly level, the locking pins will not engage smoothly. We supply supporting hardware accessories with our doors. If your installation crew runs into alignment issues, our after-sales team is available for a video call to walk them through the adjustment process. We have found that most “defective” locks are actually just misaligned strike plates. A 10-minute video call can save you a costly service call.

Why Sourcing from a Direct Manufacturer (Jusen) Benefits Your Business

You are not buying a door; you are buying a supply chain. Here is why dealing with us directly matters.

The Cost Advantage of Direct Factory Pricing

When you buy from us, you eliminate the trading company markup. We own the wood drying, the spray finishing, and the aluminum processing workshops. This vertical integration means we control the cost at every step. We can offer luxury quality at wholesale prices because we are not paying a middleman. We have seen our quote beat a trading company’s quote by 30% for the exact same specification, because they were simply adding a margin on top of our factory price.

Flexible MOQs and Production Lead Times

Not every project is a 500-unit high-rise. We understand that retail dealers need to test the market with small quantities. We offer flexible MOQs for this purpose. Conversely, we handle bulk supply for large construction projects with dedicated production lines. Because we own the workshops, we can control the production schedule directly. We do not have to wait for an external supplier to deliver components. This allows us to offer faster lead times than a trading company that has to coordinate with multiple factories.

One-Stop Customization (OEM & ODM)

Your brand might require a specific hardware finish or a unique paint color. Our spray finishing workshop can match standard RAL colors or specific wood stain samples. We keep a library of finishes and can create a custom match for your ODM project. We support private label manufacturing, so you can sell our products under your brand name. This is not just about slapping a logo on a door; it is about ensuring the entire product—from the wood species to the handle—meets your brand’s quality standards.

Why We Recommend Aluminum for High-Humidity Areas

We should be honest here. Solid wood is beautiful, but it is not always the right choice. For coastal properties or bathrooms with poor ventilation, a solid wood French door can be a maintenance headache. The constant moisture will eventually affect the finish, no matter how well we dry the wood. In these cases, we actively recommend an aluminum-clad or fully aluminum solution. We have seen too many projects where the aesthetic choice of wood was prioritized over the environmental reality, leading to callbacks and unhappy clients. We would rather lose a wood door order than see our product fail on your site. This is the kind of advice you get from a factory that has to stand behind its work, not from a distributor that just wants to move inventory.

Answering the Hard Questions Before You Order

How long does a bulk custom order take? It depends on the material and quantity. A standard solid wood door order can ship in 4-6 weeks. A complex aluminum-clad project with custom hardware might take 8-10 weeks. Because we own the workshops, we control the schedule and provide a clear timeline with your quotation. We do not give vague promises.

Can you match a specific paint color or stain? Yes. Our spray finishing workshop can match standard RAL colors or a physical wood stain sample you send us. For large projects, we recommend you approve a physical sample panel before we start full production. This eliminates the risk of color mismatch.

Do you provide hinges and handles? Yes, we supply supporting hardware accessories. We offer our standard high-quality hardware, or we can install a specific brand you specify. If you have a preferred handle manufacturer, send us the specification and we will integrate it into the door.

What happens if the doors arrive damaged? We use heavy-duty export packing and offer shipping damage protection. If damage occurs in transit, we take responsibility. We will work with you and the shipping line to file the claim and replace the damaged units. You are not left with the replacement cost.

Can you provide shop drawings for our architect? Yes. Our in-house design team provides customized shop drawings and formal quotations within 24 hours of your inquiry. This is a standard part of our service, not a premium add-on.

The Decision Guide for Your Next Project

Choose solid wood if you are working on a high-end interior renovation or a villa where the client prioritizes aesthetics and is willing to maintain the finish.

Choose aluminum-clad if you are building a modern structure, a coastal property, or any exterior application where durability and low maintenance are critical.

Choose multi-fold if you are creating a seamless indoor-outdoor flow for a large opening. But be prepared for a more complex installation and a higher budget.

Choose standard hinged if you want a reliable, classic configuration that is easier to install and maintain.

We have seen every one of these choices succeed and fail. The difference is rarely the style. It is the quality of the manufacturing and the honesty of the advice you get before you place the order. We are here to provide both.

If you have a project coming up, send us your drawings and your door schedule. We will review the technical details and get you a quotation within 24 hours.

Get a Free Custom Quote

References

[1] Jusen Doors & Windows Manufacturing Co., Ltd. Official Website. https://doorwoodendoors.com
[2] Jusen Doors & Windows Manufacturing Co., Ltd. Contact Page. https://doorwoodendoors.com/contact-us
[3] American Architectural Manufacturers Association (AAMA). “Window and Door Installation Guidelines.” https://aamanet.org
[4] WDMA (Window & Door Manufacturers Association). “Installation Instructions for Wood Doors.” https://wdma.com
[5] International Code Council (ICC). “Building Code Requirements for Door Openings.” https://iccsafe.org