Double Door Exterior Doors: Factory Sourcing Guide for B2B Buyers

13 min read

When a contractor in Ontario orders 40 units of double door exterior doors for a townhouse development, the first question is rarely about the finish. It is about the rough opening dimensions and whether the factory can adjust the frame profile to handle a 70 mph wind load rating. If the door fails the air-tightness test on site, the general contractor charges back the replacement cost plus the delay penalty. That single failure can wipe out the profit margin on the entire order.

This guide is written for procurement managers, contractors, and distributors who need to source double door exterior doors at scale. You already know what a door looks like. What you may not know is how to evaluate a factory’s capability, what technical specifications actually matter, and where the hidden costs hide in the supply chain.

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Understanding Double Door Exterior Doors: Types and Applications

Double door exterior doors consist of two adjacent panels within a single frame, typically measuring 60 to 72 inches in total width. They serve both a functional and architectural purpose: wider egress for furniture movement, increased natural light, and a formal entrance statement for commercial or residential projects.

2.1. Double Door vs. Single Door: Structural Implications

The decision between a single and double entry door is not purely aesthetic. A double door system requires a wider rough opening, which means the header beam must be engineered to carry the load across that span. For retrofit projects, this can involve structural steel reinforcement.

Standard double door widths:

The height typically ranges from 80 to 96 inches, with custom heights reaching 120 inches for grand entrances. The weight of a double door system with glazing can reach 150 to 250 pounds per panel, which directly affects hinge selection and frame rigidity.

2.2. Material Profiles for Double Door Exterior Doors

Solid wood remains the preferred choice for high-end residential projects. The key is not the species but the construction method. An engineered wood core with veneer faces resists warping significantly better than solid timber slabs — especially in double door formats where each panel is large and unsupported across its width. Standard construction uses stiles and rails of 5/4 or 6/4 stock with a panel infill.

Thermal break aluminum has become the dominant choice for commercial and modern residential projects. The aluminum profile is separated by polyamide strips, creating a thermal barrier that reduces heat transfer. For double door exterior doors, aluminum’s structural rigidity is a decisive advantage — it maintains dimensional stability across large spans without the sagging or twisting that can affect wood in humid climates.

Steel and fiberglass offer security and low maintenance. However, in double door configurations, the weight of steel panels requires heavy-duty hinges and can complicate installation. Fiberglass is lighter but less customizable in large formats.

2.3. Swing Configurations: French vs. Fixed-Panel

A true French double door has both panels operable, which maximizes ventilation but requires an astragal — the vertical strip that seals the gap between the two doors. The astragal is a critical wear point. Poorly designed astragals leak air and water, and they are the most common failure point in double door systems.

The alternative is a fixed-panel configuration where one door is inactive and only the active panel opens. This reduces hardware cost and eliminates the astragal sealing problem entirely. For high-traffic commercial entrances, this is often the more practical choice.

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Quality and Performance Factors for Double Door Exterior Doors

Double door exterior doors are more vulnerable to air and water infiltration than single doors because of the center meeting stile. The performance of the door system depends on three measurable factors: air-tightness, water-tightness, and wind load resistance.

3.1. Air-Tightness, Water-Tightness, and Wind Load

Under the European EN 12207 standard, air-tightness is classified from Class 1 (lowest) to Class 4 (highest). For exterior double doors in climates with extreme temperatures, Class 3 or 4 is expected. The test measures cubic meters of air leakage per hour per square meter of surface area at a pressure of 100 Pa.

Water-tightness follows EN 12208, rated from Class 1A to 9A. The test sprays water at increasing pressure levels to find the point of leakage. A rating of 7A or higher means the door withstands heavy rain combined with wind pressure up to 450 Pa.

Wind load resistance per EN 12210 is rated from A1 to C5, where the highest classifications withstand pressures up to 2000 Pa. This matters most for coastal or high-rise installations.

3.2. Glass and Glazing Options

Modern building codes increasingly mandate energy-efficient glazing. Low-E (low emissivity) glass has a microscopically thin metallic coating that reflects infrared radiation while allowing visible light through. Combined with argon gas fill between double or triple panes, this achieves U-values as low as 0.28 W/m²K.

For safety, tempered glass is four to five times stronger than annealed glass of the same thickness. Laminated glass — two glass layers bonded with a polyvinyl butyral interlayer — remains intact upon impact and is required in some jurisdictions for doors within 24 inches of a walking surface.

3.3. Hardware: Hinges, Astragals, and Multi-Point Locks

Double door exterior doors require hardware rated for their weight. Standard residential hinges (3.5″ × 3.5″) are insufficient. Heavy-duty ball-bearing hinges rated for 300+ pounds per pair are the minimum for large aluminum or wood panels. Pivot hinges distribute weight across the top and bottom of the frame, which suits very heavy or tall panels.

Multi-point locking systems engage bolts at multiple points along the door edge, typically 3 to 5 locations. This improves both security and the door’s resistance to warping under temperature differentials. The astragal — whether fixed or removable — must be made of the same material as the door to prevent differential expansion.

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How to Evaluate Double Door Exterior Doors Suppliers

The supplier selection process determines whether your project succeeds or fails. A factory that produces beautiful doors but cannot deliver on time, or a factory that delivers on time but with inconsistent quality, will both damage your reputation.

4.1. The Cost of Middlemen in the Door Industry

Traditional distribution channels add 15 to 30 percent markup to factory prices. A door that costs $800 at the factory gate becomes $1,040 at the distributor and $1,200 at the dealer. For volume buyers — contractors ordering 50 or more units — this markup translates to thousands of dollars per project.

Direct factory sourcing eliminates this cost. That is why importing from manufacturing hubs such as China has become standard practice for volume buyers in North America and Europe. The trade-off is the need for more rigorous supplier vetting, since you lose the local distributor’s quality assurance role.

4.2. Key Quality Indicators for Buyers

When evaluating a door factory, request the following information:

Production capacity data: How many units can the factory produce per month? What is the current utilization rate? A factory running at 100 percent capacity may not meet your lead time.

Raw material sourcing: Where does the factory source aluminum profiles, wood, and glass? Factories using vertically integrated supply chains have better quality control and shorter lead times.

In-house testing capability: Does the factory have its own air-tightness and water-tightness testing equipment? Factories that test every batch — not just random samples — catch problems before shipment.

Export experience: How many export orders does the factory handle annually? Which markets? A factory familiar with your target market’s building codes can adjust profiles and fittings accordingly.

4.3. Red Flags to Avoid

• Factories that cannot provide specific test data for their doors, only generic claims.
• Factories that quote prices without asking about your project’s climate zone or building code requirements.
• Factories that cannot provide packing lists, proforma invoices, or customs documentation in your language.
• Factories that quote extremely low MOQs (under 10 units) for custom dimensions — this often means they will batch your order with other clients’ orders, delaying your shipment.

4.4. Questions to Ask Before Ordering

• What is the lead time for a 20ft container of double door exterior doors?
• Can you provide test reports from an independent laboratory, not just your own testing?
• What is your tolerance for custom dimensions — can you adjust the frame profile without compromising the thermal break?
• What documentation do you provide for customs clearance?
• What is your policy for doors that arrive damaged or fail inspection?

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Production Process: From Raw Material to Finished Double Door Exterior Doors

Understanding the manufacturing process helps you evaluate whether a factory can deliver what they promise.

Aluminum double door production:

• Extrusion: Aluminum billets are heated to approximately 500°C and forced through steel dies to create the desired profile shape. The profile’s wall thickness (typically 1.4 to 2.0 mm) determines structural strength.
• Thermal break insertion: Polyamide strips are inserted into the profile grooves, then the aluminum is crimped or rolled to lock the strips in place. This creates the thermal barrier.
• CNC machining: Profiles are cut to length and machined for drainage holes, hinge pockets, and lock holes. CNC machining ensures precision within ±0.5 mm.
• Surface treatment: Profiles are either powder coated (RAL colors) or anodized. Powder coating involves electrostatic application of dry paint, then curing at 200°C. The coating thickness should be 60-80 microns.
• Assembly: Frames are assembled with corner connectors and structural sealant. Glass is installed with setting blocks and gaskets. Hardware is mounted and tested.
• Quality control: Each door undergoes air-tightness testing, water-tightness testing, and dimensional verification before packing.

Solid wood double door production:

• Kiln drying: Lumber is dried to 8-12 percent moisture content to prevent warping and cracking.
• Frame construction: Stiles and rails are joined with mortise and tenon joints or dowel joints, then glued and clamped.
• Panel insertion: Panels are fitted into grooves in the stiles and rails, allowing for natural wood movement.
• Sanding and finishing: Multiple stages of sanding (80 to 220 grit) before applying primer and finish coats.
• Glazing: If the door has glass panels, the glass is installed with glazing beads and sealant. Tempered or laminated glass is mandatory for most exterior applications.

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Relevant Industry Standards and Certifications

Door manufacturing is governed by performance standards that vary by region. Familiarize yourself with the standards that apply to your target market.

For factories exporting globally, ISO 9001:2015 certification is the baseline. CE marking under EN 14351-1 is required for doors sold in the European Union. A factory that can adjust its profile structure and fittings to meet local codes — rather than offering a one-size-fits-all product — is significantly more valuable as a supply partner.

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How Jusen Door and Windows Meets These Procurement Demands

The industry standards described above are not theoretical. They are the benchmarks we design our production process around. As a manufacturing facility, our approach to double door exterior doors is direct: we build to the specifications your project requires, and we test every unit before it ships.

6.1. Direct Factory Supply for Competitive Pricing

Our business model eliminates the middleman markup. When you order double door exterior doors from our factory, you are paying the production cost plus a reasonable margin — not the cumulative markups of a distribution chain. For contractors and distributors ordering in volume, this directly protects project margins.

6.2. Custom Manufacturing and OEM/ODM Flexibility

We support OEM and ODM projects. If your project requires a double door with a 96-inch height and a specific RAL color that is not in our standard catalog, we adjust the production line to your specifications. Our ability to modify profile structures and fittings means we can align our doors with the building codes of your target market — whether that is hurricane wind load requirements in Florida or thermal performance standards in Scandinavia.

Glass packages are fully customizable: Low-E coatings, argon gas fills, triple glazing, tempered or laminated configurations. Hardware accessories — hinges, locks, astragals, handles — are sourced to match your project’s security and aesthetic requirements.

6.3. Rigorous Pre-Shipment Quality Control

We maintain in-house testing equipment for air-tightness, water-tightness, and wind resistance. Every batch of double door exterior doors undergoes these tests before packing. This is not random sampling — it is a per-batch verification that the doors meet the performance standards agreed upon at the time of order.

For projects with specific certification requirements, we work with third-party testing laboratories to provide independent verification.

6.4. Export Documentation and Global Logistics

With years of foreign trade experience, we handle the paperwork. Our export process includes:

• Full packing lists with itemized dimensions and weights
• Proforma invoices for payment processing
• Commercial invoices and bill of lading for customs clearance
• Certificates of origin where required

We support both FCL (Full Container Load) and LCL (Less than Container Load) shipments. FCL is the cost-effective choice for large orders — a 20ft container holds approximately 40 to 60 double door units depending on size. LCL suits sample orders or smaller projects, with the trade-off of longer transit times.

6.5. Production Timeline

A typical bulk order for double door exterior doors follows this timeline:

Standard lead time is 3 to 6 weeks depending on order size and customization level. During peak season, we advise booking production slots 2 weeks in advance.

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Customization and OEM/ODM Options for Double Door Exterior Doors

Custom dimensions are not a special request — they are the norm for construction projects. Rough openings vary, and a door that cannot be adjusted to fit is useless regardless of its quality.

Size adjustments: Our profile structure can be adjusted to accommodate non-standard widths and heights. The engineering constraint is the aspect ratio — extremely wide or tall doors may require additional reinforcement within the frame.

Color and finish: Aluminum doors are available in any RAL color through powder coating. Wood doors accept a wide range of stains and paints. For large developments with specific architectural palettes, we match your specified color codes.

Glass configuration: From single glazing for interior-facing applications to triple glazing with Low-E coatings and argon gas fill for extreme climates.

Hardware selection: Hinge types, locking mechanisms, and handle designs are selected based on door weight, security requirements, and aesthetic preferences.

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Ordering Process: MOQ, Lead Time, and Shipping

The ordering process for double door exterior doors from a factory supplier follows a structured path:

• Inquiry and specification: Submit your project requirements — dimensions, material, glass, hardware, quantity, and target delivery date.
• Quotation: We provide a proforma invoice with unit pricing, MOQ, and lead time.
• Sample order (optional): For new clients, we recommend an LCL sample order to verify product quality and installation procedures.
• Bulk order confirmation: Deposit payment (typically 30 percent) secures production slots.
• Production: Manufacturing runs 3 to 6 weeks depending on order complexity.
• Quality control: Pre-shipment inspection verifies performance and dimensional accuracy.
• Balance payment and shipping: Remaining 70 percent is due before loading. We arrange FCL or LCL shipment from our factory.

MOQ considerations: A standard 20ft container is the most cost-effective starting point for custom dimensions. However, we evaluate project-specific requirements on a case-by-case basis. For first-time clients, a smaller trial order is acceptable to build trust.

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Choosing the Right Supplier for Double Door Exterior Doors

The decision framework for selecting a door supplier depends on your project type:

Choose a direct factory if:

• You are ordering 20 or more units
• Your project requires custom dimensions or specifications
• You need competitive pricing to maintain project margins
• You have time to manage international logistics

Choose a local distributor if:

• You need a single door for an urgent repair
• You are not comfortable managing international shipping
• Your project volume does not justify the import process

For volume buyers, the direct factory route is almost always the right choice. The key is vetting the factory thoroughly — checking production capacity, testing capabilities, export experience, and documentation readiness — before committing.

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When you are ready to move forward with a factory partner, the first step is a specification discussion. Share your project requirements — dimensions, performance standards, and quantity — and get a detailed quotation that includes lead time and shipping costs. A reliable factory will ask about your climate zone, building codes, and installation method before quoting, because those factors affect the door’s design.

Get a Free Quote

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References

• EN 14351-1:2006+A2:2010, “Windows and doors — Product standard, performance characteristics,” European Committee for Standardization. https://www.cen.eu/
• ASTM E283-04, “Standard Test Method for Determining Rate of Air Leakage Through Exterior Windows, Skylights, Curtain Walls, and Doors Under Specified Pressure Differences Across the Specimen,” ASTM International. https://www.astm.org/e0283-04.html
• ISO 9001:2015, “Quality management systems — Requirements,” International Organization for Standardization. https://www.iso.org/standard/62085.html
• AAMA/WDMA/CSA 101/I.S.2/A440-17, “North American Fenestration Standard/Specification for Windows, Doors, and Skylights,” American Architectural Manufacturers Association. https://www.aamanet.org/
• Fenestration and Glazing Industry Alliance (FGIA), “AAMA 2604 Specification for High Performance Organic Coatings on Architectural Extrusions and Panels.” https://fgiaonline.org/