Entry Double Door Sourcing Guide: Factory Supply & OEM Options

12 min read

When an overseas buyer places their first container order for entry double doors, the first question is rarely about price. It is about whether the factory can replicate the sample quality at scale. Double doors are structurally demanding — two leaves mean twice the hardware stress, twice the sealing surface, and twice the potential for misalignment. A single-door supplier does not automatically become a reliable double-door supplier.

This guide covers the technical specifications, material science, and procurement frameworks that matter when sourcing entry double doors for commercial or residential projects. The goal is to give you a practical evaluation framework before you commit to a factory.

What Is an Entry Double Door and Where Is It Used?

An entry double door consists of two adjacent door leaves mounted in a single frame, designed to open as a pair. The active leaf operates regularly; the inactive leaf is typically secured with shoot bolts or multi-point locks and opens only when full clearance is needed.

Common applications include luxury villas, hotel entrances, office lobbies, and high-end retail storefronts. The architectural appeal is obvious — a wider opening creates a sense of scale and welcomes natural light. But the commercial rationale matters too: double doors facilitate furniture movement, accommodate wheelchair access, and improve pedestrian flow in commercial settings.

Active vs. Inactive Leaf: The Mechanics of the Pair

The active leaf functions like a standard door. The inactive leaf looks identical but serves a different structural role. Between them sits the astragal — a vertical strip that seals the gap when both leaves are closed.

For out-swing doors, the astragal is typically fixed to the active leaf. For in-swing doors, it is usually mounted on the inactive leaf. Getting this detail wrong leads to air infiltration and water leakage. Multi-point locking on the inactive leaf is non-negotiable for security; shoot bolts at the top and bottom engage into the frame and threshold, preventing forced entry.

The hardware load is doubled compared to single doors. Heavy-duty hinges rated for the combined weight of both leaves are essential. Standard residential hinges will fail within months on a double door installation.

Standard Sizes vs. Custom Dimensions

Rough openings for standard double doors typically range from 60 to 72 inches in width. Common configurations include 60-inch (two 30-inch leaves), 64-inch (two 32-inch leaves), and 72-inch (two 36-inch leaves) units. Standard heights are 80 or 96 inches.

Commercial projects frequently require non-standard dimensions. Height variations for accessibility compliance or architectural statements are common. When a project requires custom sizing, the entire frame system — jamb depth, threshold profile, and header — must be recalculated. This is where the difference between a factory with engineering capability and a mere assembler becomes visible.

The Double Iron and Custom Aesthetic

Double iron front doors have gained significant traction in the custom residential market. Wrought iron elements offer security without sacrificing visibility. The challenge is combining metalwork with a properly insulated door system.

Buyers should understand the distinction between true divided lites (individual glass panes separated by mullions or grilles) and simulated divided lites (SDL), where grilles are applied to the glass surface. True divided lites provide a more authentic appearance but reduce thermal efficiency and increase cost. For large double door units, SDL is often the practical choice because it allows for larger insulated glass panels.

Material Science: Comparing Aluminum, Steel, and Solid Wood

The substrate material determines the door’s performance envelope, maintenance requirements, and lifespan.

Thermal Break Aluminum Profiles

Aluminum is the dominant material for high-performance double doors in commercial and luxury residential applications. The key specification is the thermal break — a polyamide strip that separates the interior and exterior aluminum sections. Without it, aluminum acts as a thermal conductor, creating condensation and energy loss in climate-controlled buildings.

For large, heavy leaves, aluminum’s structural rigidity is an advantage. It does not warp or twist under its own weight, unlike some other materials. Surface treatments — powder coating or anodizing — provide corrosion resistance, which is critical for coastal installations.

The Weight and Insulation of Solid Wood

Solid wood entry double doors offer aesthetic warmth that metal cannot replicate. The trade-off is maintenance. Wood expands and contracts with humidity changes, requiring periodic refinishing.

Engineered wood cores — laminated veneer lumber or cross-laminated panels — address the warping problem in large formats. These constructions maintain the appearance of solid wood while providing dimensional stability. The weight implications are significant; heavy-duty hinges and possibly floor springs become necessary.

Steel and Fiberglass Alternatives

Steel doors offer maximum security and are common in commercial back-of-house applications. They dent easily, however, and offer poor thermal performance without a foam core. Fiberglass doors mimic wood grain appearance with minimal maintenance, but they lack the structural rigidity of aluminum for large, glazed double door configurations.

For high-end custom projects, aluminum and wood dominate because both materials accommodate complex geometries and large glass areas. Steel and fiberglass are typically limited to simpler designs.

Performance Metrics: Air-Tightness, Water-Tightness, and Wind Load

Entry double doors represent a structural weak point in a building facade. Two leaves mean two sets of seals, two closing mechanisms, and a larger overall opening. Performance testing is not optional — it is the difference between a door that passes inspection and one that causes callbacks.

Understanding the Testing Standards

International standards for door performance include GB/T 7106 (China), EN 12207 (Europe), and ASTM E283/E330 (United States). These standards classify air permeability, water tightness, and wind load resistance into grades.

Air permeability classes range from 1 to 8, with 8 being the most airtight. Water tightness classes range from 1 to 9, with 9 being the highest. Wind load resistance is measured in Pascals (Pa) and must be matched to the building’s location and height.

A buyer should request the specific test reports for the exact door configuration being quoted. Test results for a single door do not apply to a double door — the larger surface area and center seam change the performance profile entirely.

Hardware Durability: Hinges and Multi-Point Locks

The hardware on a double door operates under continuous stress. Every opening cycles the full weight of the leaf through the hinge points. European-grade multi-point locking systems with hardened steel hooks are the industry standard for security.

The number of locking points matters. A three-point lock secures the top, bottom, and center. A five-point system adds intermediate points. For double doors, both leaves should have multi-point locking — the inactive leaf’s shoot bolts are what secure the center seam.

Glass Specifications for Double Doors

Glass is a major cost driver in double door manufacturing. Insulated glass units (IGUs) — two or more panes separated by a spacer and filled with argon gas — are standard for energy-efficient projects. Tempered glass is mandatory for safety in most jurisdictions; laminated glass provides additional security and sound insulation.

Low-E coatings reflect infrared radiation while allowing visible light through. The coating specification should match the climate zone of the project. A door specified for a desert climate needs different glass than one for a northern temperate zone.

The Procurement Framework: How to Evaluate a Factory

The evaluation framework distinguishes serious buyers from casual shoppers. A factory that passes this checklist is likely to deliver consistent quality.

The Cost Breakdown: Profiles, Glass, and Hardware

The quoted price for an entry double door comprises three main cost blocks: profiles, glass, and hardware. Hardware alone can account for 30% of the total price variation between quotes. The brand and grade of locks, hinges, and handles are not interchangeable — a European multi-point lock system costs significantly more than a basic Chinese domestic lock.

Ask for the hardware specification in writing before comparing prices. Two quotes at the same price point can differ by 30% in hardware quality.

MOQs and Lead Times for Bulk Orders

Minimum order quantities for factory-direct double door supply are typically container-based. A 20-foot container holds approximately 30 to 40 double door units, depending on size and packaging. A 40-foot container holds roughly double that.

Lead times vary with customization. Standard sizes with standard finishes can ship in 20 to 30 days from order confirmation. Custom sizes, special glass, or unique hardware configurations extend lead times to 45 to 60 days. Buyers should confirm whether the factory has dedicated production lines for double doors or whether they are made on shared lines with single doors.

Compliance with Local Building Codes

Building codes vary significantly by market. ENERGY STAR requirements in North America, Passive House standards in Europe, and local energy codes in Australia and the Middle East all impose different thermal performance thresholds.

The factory must be able to adjust profile structures and fittings to match the target market’s regulations. A door designed for the Chinese domestic market will not automatically meet European or North American energy standards. Buyers should ask for the specific U-value and air infiltration data for the proposed configuration.

How to Evaluate Entry Double Door Suppliers

Beyond product specifications, the supplier evaluation requires attention to manufacturing capability and quality systems.

Questions to ask before ordering:

• What is your monthly production capacity for double doors specifically?
• Can you provide test reports for the exact configuration being quoted?
• Which hardware brands do you standardize on, and what alternatives are available?
• What is your defect rate on double door shipments over the past 12 months?
• How do you handle claims for transit damage?
• Can you adjust profile structures to meet our local building codes?
• What documentation do you provide for customs clearance?

Avoid suppliers who:

• Cannot produce test reports for double door configurations
• Quote hardware without specifying brand and model
• Have no engineering staff to review custom size requests
• Cannot articulate how they handle the astragal seal on out-swing vs. in-swing doors
• Offer prices dramatically below market without explaining the cost difference

Choose A if… You need the lowest possible unit price, have a flexible timeline, and your project does not require specific energy certifications.

Choose B if… You need documented performance data, custom configurations, and a supplier who can adjust engineering to meet local codes.

Here Is How We Meet These Standards

The industry framework above describes what a qualified buyer should look for. As a manufacturing facility, our approach to entry double doors follows the same logic.

Direct Factory Supply for Competitive B2B Pricing

We operate as a direct factory supplier, which means the price you receive reflects manufacturing costs rather than a distributor’s markup. For B2B buyers working with tight margins, this cost structure matters. We are able to adjust our profile structures and fittings to match local building codes of target markets, ensuring your project passes inspection on the first attempt.

Customization and OEM/ODM Capabilities

Custom double front doors require specific design implementation — this is not a catalog product. We offer full customization on size, color, glass, and hardware accessories. Our OEM service manufactures to your exact blueprints. Our ODM service offers our proprietary designs with your branding applied. For private label partnerships, both models are available.

Quality Control and Export Logistics

The performance metrics discussed earlier — air-tightness, water-tightness, wind resistance — are verified through strict pre-shipment inspection on every order. We do not rely on spot checks or sampling. Each unit is tested against the specifications agreed at order confirmation.

Our foreign trade experience covers the full documentation package: packing lists, proforma invoices, and customs documents. We support FCL and LCL shipments with direct delivery from our China factory. Export crating is designed to prevent transit damage, with the door leaves protected against moisture and impact.

Our Door Manufacturing Capabilities

Our production lines handle the full range of entry double door configurations: thermal-break aluminum, solid wood, and aluminum-wood composites. The manufacturing process includes profile cutting, machining, assembly, glass installation, hardware fitting, and final adjustment.

Profile machining is done on CNC equipment for dimensional accuracy. The thermal break assembly — polyamide strip insertion and crimping — is performed under controlled conditions to ensure consistent insulation performance. Glass cutting and tempering are outsourced to certified glass processors, with incoming inspection before assembly.

The critical step in double door production is the final adjustment. The astragal alignment, hinge tension, and lock engagement must be set precisely. A door that fits perfectly in the factory will install correctly on site. A door with tolerance issues creates problems for the installer and the end client.

Quality Control: Our Multi-Stage Inspection Process

Quality control begins with incoming raw materials. Aluminum profiles are checked for surface finish and dimensional tolerance. Hardware is verified against the specified brand and model. Glass is inspected for chips, scratches, and correct specification.

In-process inspection covers profile machining accuracy, thermal break integrity, and assembly alignment. Pre-shipment inspection includes the performance tests discussed earlier: air-tightness, water-tightness, and wind resistance. Each door is also checked for hardware function, seal continuity, and cosmetic appearance.

The inspection report accompanies the shipment. If a unit fails any test, it is reworked or replaced before the container is loaded.

Customization and OEM/ODM Options

For buyers who require private label products, our OEM and ODM services provide the flexibility to establish your own brand line. We manufacture to your specifications, apply your branding, and ship directly to your market.

The customization scope includes:

• Door dimensions (width, height, frame depth)
• Profile color and finish (powder coating, anodizing, wood grain laminate)
• Glass type (tempered, laminated, Low-E, insulated)
• Hardware brand and finish
• Hinge type (visible, concealed, or pivot)
• Threshold profile and height

Ordering Process: MOQ, Lead Time, and Shipping

The ordering process follows a structured sequence designed to eliminate misunderstandings.

Step 1: Inquiry. Submit your drawings, size requirements, glass specifications, and target quantity.

Step 2: Quotation. We respond with a detailed quote covering unit price, hardware specification, and delivery timeline.

Step 3: Sample approval. For custom configurations, we recommend a pre-production sample. This is the point where design issues surface — before container production begins.

Step 4: Production. Once the sample is approved, production runs on a confirmed schedule.

Step 5: Inspection. Pre-shipment inspection is conducted, and the report is shared with you.

Step 6: Shipment. FCL or LCL options are arranged with full export documentation.

MOQs are container-based, which is the most cost-efficient shipping method for bulk orders. Lead times range from 20 to 60 days depending on customization level and current production load.

Certifications and Industry Standards

Our testing procedures align with GB/T 7106 for air permeability, water tightness, and wind load resistance. For projects requiring specific international certifications, we adjust the profile structure and fittings to meet the target market’s requirements. This is not a one-size-fits-all approach — the engineering is adapted to the destination.

Fire-rated doors are a separate category. We do not claim fire ratings beyond what is explicitly tested and certified for each configuration.

References

• GB/T 7106-2019, “Graduation of air permeability, water tightness and wind load resistance performance of building external windows and doors,” Standardization Administration of China. https://www.sac.gov.cn/
• EN 12207:2016, “Windows and doors — Air permeability — Classification,” European Committee for Standardization. https://www.cen.eu/
• 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/
• ENERGY STAR Program Requirements for Residential Windows, Doors, and Skylights. https://www.energystar.gov/

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