Double Door Entry Buying Guide | Factory Sourcing & Specs

17 min read

When a contractor in Florida asks about impact-rated double doors, they are calculating wind load resistance and whether the inspector will sign off. When a developer in Dubai specifies a villa entrance, the conversation shifts to thermal performance and 50°C temperature swings. And when an importer in Germany opens a quote from a Chinese factory, the first thing they check is whether the test reports match EN standards — not whether the door looks nice in photos.

This guide is written for buyers who need to specify, source, and receive double door entry systems that perform. We will cover materials, sizing standards, performance testing, customization parameters, and how to evaluate a factory before committing to a container order.

1. Understanding Double Door Entry: Types and Applications

A double door entry is exactly what the name suggests: two adjacent door leaves mounted within a single frame. But beneath that simple definition lies a range of configurations, materials, and operating mechanisms that dramatically affect performance, cost, and suitability.

1.1 What Counts as a Double Door Entry?

In architectural terminology, a double door entry may be called a “pair of doors,” “double-leaf door,” or “twin door.” When both leaves are glazed, the term “French door” is common. The key distinction from a single door is the width of the opening and the structural implications of that width.

Two leaves share a single frame. One leaf may be active (operable) while the other remains passive (fixed). Or both can open. This matters for hardware specification — passive leaves require flush bolts at top and bottom, while active leaves carry the primary locking mechanism.

1.2 Material Categories in the Market

Three material families dominate the double door entry market:

Material	Strengths	Typical Applications	Price Range (per unit, factory)
Thermal-break aluminum	Corrosion resistance, thermal efficiency, slim profiles, low maintenance	Modern villas, commercial buildings, coastal projects	$800–$2,500
Solid wood	Classic aesthetics, natural insulation, premium feel	Luxury residences, heritage buildings, hotels	$1,200–$4,000
Steel/iron core	High security, tamper resistance, structural strength	Banks, government buildings, high-security residences	$1,500–$3,500

Aluminum is the workhorse of commercial and modern residential projects. It does not warp, requires minimal maintenance, and with thermal-break technology, it performs well even in extreme climates. Solid wood remains the choice for projects where appearance is the primary driver. Steel and iron doors serve security-first applications.

1.3 Operation Styles

Hinged double doors are the most common. They swing inward or outward, require adequate clearance, and offer the simplest hardware configuration. Sliding double doors save space and suit patios, terraces, and interior partitions. Multi-fold systems maximize opening width and are popular for sunrooms and commercial storefronts, though they cost more and require more complex track hardware.

The operation style determines the frame profile depth, hinge type, and locking configuration. A buyer should decide this early because it influences every subsequent specification.

2. Double Door Entry Quality and Performance Factors

A door that looks good in a showroom can fail within two years if performance factors are ignored. These are the technical parameters that separate durable, code-compliant products from problems.

2.1 Air-Tightness

Air leakage through a double door entry wastes energy and allows dust, noise, and moisture ingress. Testing follows ASTM E283 in North America or EN 12153 in Europe. Ratings are expressed as air leakage rates in cubic feet per minute per square foot (CFM/ft²) or cubic meters per hour per square meter (m³/h·m²).

For a high-performance double door entry, look for air leakage below 0.3 CFM/ft² at 1.57 psf test pressure. This corresponds roughly to Class 4 in the EN 12207 classification system. Poorly sealed double doors — especially those with a passive leaf — often leak at the meeting stile where the two leaves join. This junction requires either an overlapping astragal or a compression seal.

2.2 Water-Tightness

Water penetration resistance is critical for exterior doors exposed to rain and wind. Testing follows ASTM E547 or EN 12154. The test measures the pressure at which water penetrates the door assembly.

For coastal or high-wind regions, specify a minimum water-tightness rating of 6A per EN 12208 (150 Pa) or higher. In hurricane-prone areas, this requirement increases substantially. The frame-to-wall interface matters as much as the door itself. Flashing, sealant, and proper drainage paths in the threshold are non-negotiable.

2.3 Wind Resistance

Wind load performance is tested per ASTM E330 or EN 12211. The door assembly must withstand positive and negative wind pressures without permanent deformation or failure of structural components.

For high-rise buildings, wind loads can exceed 3,000 Pa. A double door entry with a wide span and large glass panels requires a reinforced frame profile and adequate anchoring. This is where aluminum’s structural strength becomes an advantage over wood — extruded aluminum profiles can be engineered with specific wall thicknesses and reinforcement chambers.

2.4 Thermal Performance

U-factor (thermal transmittance) measures how much heat passes through the door assembly. Lower is better. A good thermal-break aluminum double door with double glazing achieves a U-factor of 1.4–2.0 W/m²K. Passive house projects require U-factors below 0.8 W/m²K, which demands triple glazing and specialized frame profiles.

In North America, NFRC (National Fenestration Rating Council) labeling provides U-factor ratings. In Europe, the relevant standard is EN ISO 10077. Buyers should request these values in writing from any supplier.

2.5 Hardware Quality

Hardware carries the daily operational load. A double door entry relies on hinges that support significant weight — a pair of solid wood doors can weigh 150–250 kg. Multi-point locking systems distribute force across multiple points, improving both security and weather sealing.

Specify stainless steel hinges for exterior applications. Zinc-alloy or aluminum hardware will corrode in coastal environments. For high-traffic commercial entrances, consider concealed closers and panic bars if required by local fire codes.

3. Custom Double Front Doors: What B2B Buyers Must Specify

Customization is standard practice in the industry. Factories routinely produce doors to exact dimensions, colors, and hardware configurations. The challenge is communicating specifications clearly enough to avoid costly errors.

3.1 Key Specification Parameters

Provide these details in every inquiry:

• Rough opening dimensions (width × height × wall thickness) — not the finished opening. The frame size differs from the door leaf size.
• Material and finish — aluminum profile series (e.g., 60mm, 70mm, 80mm frame depth), wood species, or steel gauge. Color via RAL number, wood stain, or custom powder coating.
• Glass specification — single or double glazing, glass thickness (e.g., 5mm + 12A + 5mm), coating (low-E, reflective), safety treatment (tempered, laminated), and fill gas (argon, krypton).
• Hardware package — handle style, lock type (multi-point, mortise, electronic), hinge type and quantity, door closer, threshold material.
• Operation — which leaf is active, which is passive. Inswing or outswing.
• Performance requirements — U-factor target, air-tightness class, water-tightness class, wind load rating.

3.2 Drawings and Approvals

A professional factory will produce shop drawings for approval before production. These drawings show the frame profile, glass configuration, hardware placement, and anchoring details. Review them carefully. The approval signature is the point of no return — once production begins, changes cost time and money.

Request a pre-production sample for large orders. A physical sample reveals finish quality, hardware feel, and assembly precision that drawings cannot convey. For orders above 50 units, most factories can produce and ship a sample door for approval.

3.3 Lead Times

Standard lead times for double door entry orders:

Order Type	Lead Time
Standard sizes, standard finish	2–3 weeks
Custom sizes, standard finish	3–4 weeks
Custom sizes, custom color/RAL	4–5 weeks
Solid wood or iron, full custom	6–8 weeks
Bulk project orders (100+ units)	8–12 weeks

These timelines assume clear specifications and approved drawings. Delays occur when buyers change specifications mid-production or when drawings require multiple revision rounds.

4. How to Evaluate Double Door Entry Suppliers

The difference between a smooth project and a nightmare often comes down to supplier selection. This section provides a framework for evaluating factories, not just comparing prices.

4.1 Direct Factory vs. Trading Company

A trading company sources from multiple factories and adds a margin. A direct factory manufactures the product itself. The distinction matters for three reasons:

• Price: Factory-direct pricing eliminates the middleman markup, typically 10–20%.
• Accountability: With a factory, the entity you contract with is the entity that produces your goods. There is no disconnect between what the salesperson promises and what the production floor delivers.
• Customization: Factories can adjust profiles, tooling, and finishes. Trading companies are limited to what their partner factories offer.

Verify a factory’s status by asking for their business license, factory photos, and a video tour of the production line. A legitimate manufacturer will happily provide these.

4.2 Red Flags to Watch For

Avoid suppliers who:

• Cannot provide third-party test reports for air-tightness, water-tightness, or wind resistance.
• Quote unrealistically low prices for custom work. If the price is 30% below the market average, they are likely cutting corners on profile thickness, glass quality, or hardware.
• Refuse to provide shop drawings for approval.
• Have no documented quality control process.
• Cannot name the specific aluminum alloy or wood species they use.
• Promise 2-week delivery for fully custom solid wood doors. That timeline is not feasible for quality work.

4.3 Questions to Ask Before Ordering

• What aluminum alloy do you use? (Look for 6063-T5 or equivalent.)
• What is the profile wall thickness? (1.4mm–2.0mm is standard for exterior doors.)
• Can you provide test reports from an accredited laboratory?
• What is your quality control process before shipment?
• What is your MOQ? (Most factories accept 1–5 units for custom orders.)
• What shipping terms do you offer? (FOB, CIF, EXW)
• Can you provide references from similar projects?
• What is your policy for defective units?

4.4 Choose A if… Choose B if…

Choose a factory-direct manufacturer if you have custom specifications, need competitive pricing on bulk orders, or want direct communication with the production team.

Choose a local distributor if you need immediate delivery of standard sizes, require on-site installation support, or are ordering fewer than 5 units and shipping costs would exceed the savings.

5. Industry Standards and Certifications

Standards provide a common language between buyer and supplier. Knowing which standards apply to your market protects you from receiving products that fail inspection.

5.1 North American Standards

• AAMA/WDMA/CSA 101/I.S.2/A440 — The primary specification for windows and doors in the U.S. and Canada. It covers air leakage, water penetration, and structural performance.
• ASTM E283 — Air leakage test method.
• ASTM E547 — Water penetration test method.
• ASTM E330 — Structural performance (wind load) test method.
• NFRC 100 — U-factor and SHGC rating procedure.

5.2 European Standards

• EN 14351-1 — The harmonized product standard for windows and pedestrian doorsets. It includes CE marking requirements.
• EN 12207 — Air permeability classification.
• EN 12208 — Water tightness classification.
• EN 12211 — Wind load resistance classification.
• EN ISO 10077 — Thermal performance calculation.

5.3 ISO and Quality Management

• ISO 9001:2015 — Quality management systems. A factory with this certification has documented processes for quality control.
• ISO 14001 — Environmental management. Relevant if your project requires sustainability credentials.

Ask suppliers to share their certificates with certificate numbers. Verify these with the issuing body if the order value justifies the effort.

6. Double Iron Front Doors and Specialty Options

The term “double iron front doors” represents a specific product category: doors with steel or wrought-iron construction, often featuring decorative elements. These doors serve markets where security and aesthetic statement are equally important.

6.1 Construction and Security Features

Iron doors typically use a steel frame with either solid metal panels or metal frames holding glass inserts. The steel gauge matters — 16-gauge (1.5mm) to 12-gauge (2.5mm) are common. Heavier gauge provides greater structural strength and tamper resistance.

Multi-point locking systems are essential for iron doors. A single deadbolt on a 250kg door is insufficient. Specify at least three locking points — top, bottom, and center — for exterior applications.

6.2 Aesthetic Range

Iron doors range from ornate scrollwork patterns to minimalist industrial designs. The decorative elements are typically welded to the frame and finished with powder coating or liquid paint. Custom patterns are possible but add cost and lead time.

6.3 Weight Considerations

A pair of iron double doors can weigh 300–500 kg. This demands heavy-duty hinges — ball-bearing hinges or pivot systems rated for the specific weight. The frame must be reinforced to carry the load, and the wall opening must be structurally sound. Buyers should verify that the supplier’s hardware package matches the door weight.

7. Production Process: From Raw Material to Finished Door

Understanding how a double door entry is manufactured helps buyers assess quality and set realistic expectations. This section walks through the production process for aluminum and wood doors.

7.1 Aluminum Door Production

• Extrusion: Aluminum billets (typically 6063-T5 alloy) are heated and forced through dies to create the profile shapes. The profiles are then quenched and aged to achieve the required mechanical properties.
• Cutting and Machining: Profiles are cut to length, and holes are drilled or milled for hardware, drainage, and assembly. CNC machining centers handle this with precision to ±0.5mm.
• Thermal Break Assembly: For thermal-break profiles, the aluminum sections are joined with polyamide strips. The assembly is crimped or rolled to secure the connection.
• Surface Treatment: Powder coating is the most common finish. The profiles are cleaned, chemically pre-treated, and coated with polyester powder, then cured in an oven. Anodizing is an alternative for certain applications.
• Glass Fabrication: Glass panels are cut, edged, and tempered or laminated. Insulated glass units are assembled with spacer bars and sealed.
• Assembly: Frames are assembled, hardware is installed, and glass is glazed. Each unit is checked for squareness, hardware function, and seal integrity.
• Testing: Finished doors undergo air-tightness and water-tightness testing. Water spray tests are common for exterior doors.

7.2 Solid Wood Door Production

• Lumber Selection: Wood is selected, inspected for defects, and moisture-conditioned to 8–12% moisture content.
• Machining: Stiles and rails are cut and profiled. Tenons are cut for joinery.
• Assembly: Stile-and-rail construction with glued tenon joints. Panels are fitted into grooves.
• Sanding: The assembled door is sanded to a smooth finish, typically progressing through multiple grits.
• Finishing: Stains, sealers, and topcoats are applied. UV-cured finishes are common for durability.
• Hardware Installation: Hinges, locks, and other hardware are installed. Some buyers prefer doors shipped without hardware for local installation.
• Inspection: Doors are checked for warping, finish defects, and hardware function.

8. How Jusen Door and Windows Manufacturing Co., Ltd. Meets These Procurement Standards

The standards described above are not theoretical. They are the daily operating requirements in our factory. Here is how we address each area.

8.1 Factory-Direct Supply with Full Customization

We are a manufacturing facility, not a trading company. When you order from us, you work directly with the team that produces your doors. This eliminates the middleman markup and ensures that the specifications you approve in the shop drawings are exactly what the production floor builds.

Our double door entry systems include thermal-break aluminum, solid wood, and steel-reinforced options. We offer full customization on size, color, glass configuration, and hardware accessories. Our engineers can adjust profile structures and fittings to match local building codes in your target market — whether that means meeting Florida’s high-velocity hurricane zone requirements or Germany’s passive house standards.

8.2 Rigorous Pre-Shipment Quality Control

Every double door entry order undergoes testing before it leaves our factory. We conduct air-tightness, water-tightness, and wind resistance tests per the relevant standards for your market. For each batch, we provide inspection reports documenting the results.

Our quality control process follows ISO 9001:2015 procedures. This includes incoming material inspection, in-process checks during production, and final pre-shipment inspection. We photograph and document each unit for your records.

8.3 Export Experience and Logistics Support

We have supplied doors to construction projects across North America, Europe, the Middle East, and Southeast Asia. This experience means we handle the paperwork correctly: packing lists, proforma invoices, and full customs documentation.

We ship both FCL (full container load) and LCL (less than container load). For LCL shipments, we use professional packing that protects doors during consolidation and transit. Direct delivery from our factory in China to your port or project site.

If you need to adapt our products to local building codes, our engineering team can modify profiles and fittings accordingly. We have done this for projects in hurricane zones, seismic regions, and extreme cold climates.

Contact Our Team to discuss your project requirements and receive a detailed quotation.

9. Cooperation Models: OEM, ODM, and Bulk Supply

Different projects require different collaboration structures. We offer three primary models.

9.1 OEM: Build to Your Specification

You provide the drawings, specifications, and performance requirements. We manufacture to your exact dimensions and quality standards. Your brand, your design, our manufacturing capability. This model suits importers, distributors, and construction companies with established specifications.

9.2 ODM: Leverage Our Existing Designs

We maintain a catalog of double door entry platforms that have been engineered, tested, and produced at scale. You select a base design and customize finishes, glass, hardware, and dimensions. This reduces lead time and development cost compared to fully custom designs.

9.3 Construction Project Bulk Supply

For large projects, we offer volume pricing, staged deliveries aligned with construction milestones, and dedicated project management. We have supplied doors for villa communities, hotel developments, and commercial complexes. For projects above 100 units, our team works with your contractor to coordinate delivery schedules and on-site installation requirements.

10. Ordering Process: MOQ, Lead Time, and Shipping

A clear ordering process prevents misunderstandings. Here is how we structure projects.

10.1 MOQ and Sampling

Our MOQ for standard double door entry units is 1 container for bulk pricing. For custom samples, we accept single-unit orders. The sample production takes 2–3 weeks and the unit is shipped via express courier for your approval before bulk production begins.

10.2 Lead Times

Refer to the lead time table in Section 3.3. We confirm the schedule in writing after receiving your specifications and deposit.

10.3 Shipping Terms

We offer FOB (Free On Board), CIF (Cost, Insurance, Freight), and EXW (Ex Works) terms. For FOB shipments, we handle all export documentation and deliver to the port of departure. Our logistics team coordinates with your freight forwarder to ensure smooth loading.

10.4 Payment Terms

Typical payment terms are 30% deposit with the order and 70% balance before shipment. For established relationships, we can discuss letter of credit arrangements.

11. Key Questions When Sourcing Double Door Entry —

FAQ

What is a double door entry called?

A double door entry is commonly referred to as a “double door,” “pair of doors,” or “double-leaf door.” When both leaves are glazed, the term “French door” is often used. In commercial specifications, “twin door” may appear.

What is a double entry door?

A double entry door is a system with two adjacent door leaves within a single frame. Both leaves can be operable, or one leaf may be fixed while the other is active. The configuration affects hardware specification and security features.

What are the best double entry doors?

The “best” double entry door depends on project requirements. For energy efficiency, thermal-break aluminum with low-E glazing performs well. For security, steel or iron-core doors are preferred. For luxury residential projects, solid wood remains a top choice. Evaluate material, performance ratings, and customization capability rather than a single “best” option.

What is the standard size of a double door entry?

Standard double door widths in North America are typically 60″ (5’0″), 64″ (5’4″), and 72″ (6’0″). Standard heights are 80″ (6’8″) and 96″ (8’0″). Metric markets commonly use widths of 1200mm, 1500mm, and 1800mm. Custom sizes are available from most factories.

What is the difference between a French door and a double door?

All French doors are double doors, but not all double doors are French doors. French doors have glass panels throughout most of their surface. Double doors can have solid panels, glass inserts, or a combination.

Can a factory match local building codes for my market?

Yes, reputable manufacturers offer adjustable profile structures and fittings to comply with regional energy codes, wind load requirements, and safety standards. Always request documentation of test results and code compliance before ordering.

What is the typical lead time for custom double door entry orders?

Lead times vary by material and complexity. Standard aluminum double doors typically take 3–5 weeks. Custom wood or iron doors may require 6–8 weeks. Bulk project orders should be planned 8–12 weeks in advance.

How do I get a quote for a double door entry project?

Provide your specifications — dimensions, material, glass type, hardware preferences, quantity, and delivery destination — to a factory supplier. A detailed quote should include product pricing, packaging, shipping terms (FCL/LCL), and documentation costs.

12. Decision Guide: Choosing the Right Double Door Entry for Your Project

Choose thermal-break aluminum if your project prioritizes energy efficiency, requires minimal maintenance, or is located in a coastal or extreme climate zone.

Choose solid wood if the project demands classic aesthetics, you are working with heritage buildings, or the client prioritizes natural materials.

Choose steel or iron if security is the primary concern, the project involves government or financial institutions, or you need high tamper resistance.

Choose a factory-direct manufacturer if you need custom specifications, competitive bulk pricing, or direct communication with production engineers.

Choose a local distributor if you need immediate delivery of standard sizes, require local installation support, or are ordering fewer than 5 units.

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Selecting a double door entry requires balancing aesthetics, performance, customization, and supplier reliability. Verify test standards, custom capabilities, and export experience before committing. Working with a factory-direct manufacturer ensures competitive pricing, full customization, and strict quality control.

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References

• ASTM E283-19, Standard Test Method for Determining Rate of Air Leakage Through Exterior Windows, Skylights, and Doors Under Specified Pressure Differences Across the Specimen. ASTM International. https://www.astm.org/e0283-19.html
• ASTM E547-00(2016), Standard Test Method for Water Penetration of Exterior Windows, Skylights, Doors, and Curtain Walls by Cyclic Static Air Pressure Difference. ASTM International. https://www.astm.org/e0547-00r16.html
• ASTM E330/E330M-14, Standard Test Method for Structural Performance of Exterior Windows, Skylights, Doors, and Curtain Walls by Uniform Static Air Pressure Difference. ASTM International. https://www.astm.org/e0330_e0330m-14.html
• EN 14351-1:2006+A2:2016, Windows and doors — Product standard, performance characteristics. European Committee for Standardization. https://www.cen.eu/
• EN 12207:2016, Windows and doors — Air permeability — Classification. European Committee for Standardization. https://www.cen.eu/
• EN 12208:2000, Windows and doors — Water tightness — Classification. European Committee for Standardization. https://www.cen.eu/
• NFRC 100-2023, Procedure for Determining Fenestration Product U-factors. National Fenestration Rating Council. https://www.nfrc.org/
• 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/