Entry Double Doors Factory Supply | Jusen Manufacturer

11 min read

A contractor in Vancouver once ordered forty sets of entry double doors for a high-end residential development. The sample unit passed inspection. The production run did not. The frames arrived with hairline cracks in the welded corners — invisible to the naked eye, but enough to fail the air-tightness test on site. The supplier blamed shipping. The contractor ate the cost of replacement and three weeks of delay.

That story repeats across the industry because entry double doors sit at the intersection of structural engineering, thermal performance, and logistics — and most buyers only evaluate one of those three dimensions before placing an order.

This guide breaks down the technical decisions, compliance requirements, and supply chain considerations that determine whether your double door project succeeds or fails.

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Evaluating Entry Double Door Materials for Commercial and Residential Projects

Aluminum vs. Solid Wood vs. Steel: Structural Integrity and Thermal Performance

The material choice for entry double doors comes down to three factors: weight-to-strength ratio, thermal performance, and maintenance tolerance.

Aluminum with thermal break offers the best structural stability per kilogram. A double-leaf configuration means each frame carries significant wind load, especially in open positions. Aluminum’s extrusion process allows for reinforcement chambers inside the profile, which steel and wood cannot match without added bulk. For coastal regions or high-rise applications, this matters.

Solid wood delivers aesthetic value that metal cannot replicate. However, wood is dimensionally unstable. A double door leaf that warps by even 3mm will cause the center meeting stile to bind, compromising the air seal. Wood requires ongoing maintenance — refinishing every 2-3 years in exposed conditions.

Steel provides dent resistance and perceived security, but steel conducts heat readily. A steel double door without proper thermal separation will develop condensation in winter and act as a thermal bridge. Unless specified as insulated steel with a polyamide break, steel doors generally underperform in energy efficiency [1].

The critical distinction: for double doors, the material must work in concert with the frame system. A wood door with an aluminum sub-frame can outperform a solid steel unit in both thermal and structural tests.

The Critical Role of the Thermal Break in Double Door Frames

A thermal break is a polyamide strip inserted between the interior and exterior aluminum profiles. It interrupts the metal-to-metal path that conducts heat and cold.

For entry double doors, the thermal break is non-negotiable. Here is why: a double door has roughly 30% more frame perimeter than a single door of equivalent opening width. That additional perimeter represents more surface area for heat transfer. Without a thermal break, the interior frame surface temperature drops below the dew point in cold climates, causing condensation that damages flooring and framing.

The industry standard thermal break width ranges from 20mm to 34mm for residential applications. Wider breaks (34mm+) are recommended for passive house or near-zero energy builds. The polyamide strips should be reinforced with glass fiber for structural rigidity — plain nylon strips will flex under wind load, compromising the door’s alignment over time [2].

Glass and Hardware Specifications: Matching Performance to Climate

Double-leaf doors carry a disproportionate amount of glazing compared to single doors, simply because the total opening is larger. This makes glass selection critical.

For soundproofing in urban environments: asymmetric double glazing (e.g., 6mm outer pane, 12mm gap, 4mm inner pane) disrupts sound wave resonance more effectively than symmetric configurations. A 12mm gap is the minimum for meaningful acoustic separation.

For solar control in hot climates: Low-E coatings with a low solar heat gain coefficient (SHGC below 0.25) reduce cooling loads significantly. But the coating placement matters — on the outer pane for hot climates, on the inner pane for cold climates.

Hardware is where most double doors fail. Each leaf can weigh 60-80kg depending on glazing. Standard hinges will sag. Multi-point locking systems distribute the clamping force across the entire perimeter of the door, preventing the leaf from bowing at the center. For double doors, both leaves should have multi-point locks — the inactive leaf needs shoot bolts at the top and bottom to prevent flexing in wind events [3].

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Customization and Compliance: Configuring Entry Double Doors for Global Markets

Navigating Size Constraints and Egress Codes

Building codes dictate the minimum clear opening for egress. In the United States, the International Building Code requires a minimum clear width of 32 inches (813mm) for the active leaf of a double door [4]. In the EU, EN 14351-1 specifies different requirements based on the building’s occupancy classification.

The distinction between the active leaf (the one with the handle and lock) and the inactive leaf (the one that bolts at the top and bottom) is not decorative. The active leaf must be engineered to operate independently — meaning it must have sufficient structural rigidity to function as a single door if the inactive leaf is locked.

For oversized dimensions (doors wider than 1800mm total), a mullion — the center post — becomes necessary. A mullion-less design is visually cleaner but requires heavier frame sections to maintain wind-load resistance. The tradeoff: mullion-less frames are typically 20-30% heavier in profile weight and require more complex hardware coordination.

Color, Finish, and Glass Customization (OEM/ODM)

Powder coating (polyester-based) offers the widest color palette — RAL, NCS, or custom Pantone matching. The coating thickness should be 60-80 microns for exterior applications. Below 60 microns, the coating may not adequately cover extrusion edges, leading to premature corrosion.

Anodizing provides a metallic finish that is more scratch-resistant than powder coating but offers fewer color options (typically bronze, silver, black, or gold). Anodizing creates a surface layer that is part of the aluminum itself — it cannot delaminate. For coastal environments, anodized finishes generally outperform powder coating in salt-spray resistance [5].

Wood-grain transfer (thermal sublimation) applies a wood pattern onto aluminum profiles. This process prints the pattern onto a transfer film, which is then vacuum-applied to the coated profile and baked. The result is a wood appearance with aluminum’s durability. For projects seeking the aesthetic of hardwood without the maintenance, this is the most cost-effective route.

Adjusting Hardware to Local Building Standards

European multi-point locks use a different mechanism than American deadbolts. UK and EU standards (BS EN 1627) classify security levels from RC1 to RC6, while North American standards rely on ANSI/BHMA grades. A manufacturer cannot simply swap the cylinder — the entire locking mechanism, including the strike plate and door edge prep, must match.

Wind-load requirements also vary. A double door installed in Miami (ASCE 7-16 wind speed mapping) must withstand significantly higher pressures than one in Chicago. The frame profile depth, reinforcement strategy, and hardware gauge must all be adjusted accordingly. A qualified manufacturer will ask about the project’s location before recommending a profile system — not after the order is placed.

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The Procurement Framework: Quality Control and Logistics for Bulk Orders

Pre-Shipment Inspections: Testing Air, Water, and Wind Resistance

Double doors are the weakest point in a building envelope. The combined perimeter of two leaves creates more potential leak paths than a single door. Therefore, testing standards are specifically rigorous.

ASTM E283 measures air leakage through the door assembly. For a double door, the acceptable rate depends on the performance class — but a tested value below 0.3 cfm/ft² is typical for high-performance units.

ASTM E547 (or AAMA 501) tests water penetration under dynamic pressure. The test involves spraying water at the door while applying increasing air pressure. A double door that fails this test will leak during wind-driven rain — the most common field complaint.

ASTM E330 measures structural wind load resistance. The door must not deflect more than L/175 (where L is the span) under design wind pressure, and must return to its original position without permanent deformation.

Buyers should request test reports from the manufacturer’s actual production line — not from a sample unit built specifically for certification. Ask for the test date, the frame dimensions, and the hardware configuration tested. If the tested unit was 1200mm wide and your project requires 1800mm, the test report has limited applicability.

Packaging and Container Loading (FCL vs. LCL)

Entry double doors are large, fragile, and awkward to ship. A typical double door unit measures 2000mm x 1800mm — too wide for standard pallet consolidation in LCL shipments.

LCL (Less than Container Load) — for smaller orders, LCL is the only option. But double doors in LCL face a higher risk of damage because they share container space with other cargo. Proper crating is essential: each door should be individually wrapped in protective film, then placed in a wooden crate with internal bracing at the hinge and lock locations. The crates must be marked “fragile” and “this side up.”

FCL (Full Container Load) — for bulk orders, FCL is the preferred method. The buyer controls the entire container, allowing for better load planning. Double doors can be shipped on custom-built racks that hold the units vertically, reducing the risk of crushing from stacked cargo. FCL also eliminates the risk of mixed-load contamination (e.g., chemical goods leaking onto door surfaces).

Documentation and Customs Compliance

A proforma invoice is not just a quotation — it is a legally binding document that customs officials use to assess duties. It must include:

• Product descriptions with HS codes (aluminum doors typically fall under 7610.10 or 7308.30, depending on construction)
• Unit prices in the agreed currency
• Incoterms (FOB, CIF, EXW, etc.)
• Country of origin
• Shipping marks and container numbers

A packing list must detail the contents of each crate, including dimensions and weights. Missing or inaccurate packing lists are the leading cause of customs delays. For projects in the EU, CE marking under EN 14351-1 may be required — the manufacturer must provide the Declaration of Performance (DoP) document.

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How a Direct Factory Partnership Optimizes Your Supply Chain

The procurement framework above describes the industry standard. As a manufacturer, our approach to these challenges is direct supply — no trading company in between.

Here is how that structure benefits the buyer:

When you work with a trading company, the markup typically ranges from 10-20% on the factory price. For a project buying 100 sets of double doors, that markup represents a significant budget line. Direct factory supply removes this cost. You pay for manufacturing plus shipping, and you communicate directly with the engineers who design the profile systems — not with a middleman who relays questions.

The second benefit is compliance flexibility. We adjust profile structures and fittings to match the specific local building codes of your target market. A project in Australia requires different wind-load ratings than one in Canada. Our production line accommodates both by changing the reinforcement strategy and hardware configuration — not by building a completely different product.

For documentation, we provide the complete export package: packing list, proforma invoice, certificate of origin, and any test reports required for customs clearance in your destination country.

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Our Manufacturing Capabilities for Entry Double Doors

Product Range: Aluminum, Wood, and System Doors

Our production lines cover three categories relevant to entry double doors:

• Thermal-break aluminum doors — available in 20mm, 26mm, and 34mm break widths, with profile depths from 45mm to 70mm depending on structural requirements.
• Solid wood doors — in oak, mahogany, and engineered wood composites, with aluminum or steel sub-frames for structural stability.
• System doors — integrated frames with pre-installed gaskets, designed for rapid installation on construction sites.

For construction project bulk supply, we maintain a dedicated production shift for large orders. This ensures that a 200-unit order does not disrupt standard production schedules — and vice versa.

OEM, ODM, and Private Label Services

Buyers can specify their own hardware brands — whether that is a European multi-point lock system or a North American deadbolt. We do not require you to use our standard fittings. The frame profile is manufactured to accommodate the locking mechanism you specify, including the necessary edge prep and strike plate reinforcement.

Color matching is available via RAL, NCS, or your own supplied color chip. Powder coating is done in-house, allowing for custom color runs without minimum order penalties.

For OEM orders, we manufacture to your drawings and specifications. For ODM orders, we work with your team to develop a custom profile system if the standard range does not meet your project’s requirements.

Quality Assurance Before Shipping

Every double door order undergoes the same pre-shipment inspection process:

• Air-tightness test — performed on a sample unit from the production batch, not a showcase sample.
• Water-tightness test — under dynamic pressure conditions per ASTM E547.
• Wind resistance test — structural deflection measurement per ASTM E330.

Test reports are provided with each shipment. If a batch fails any test, the entire batch is reworked before shipping — not shipped “as-is” with a discount.

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Client Case Scenarios and Logistics Support

A developer in the Caribbean ordered 120 sets of thermal-break aluminum double doors for a beachfront villa project. The wind-load requirement was 200 km/h (Category 5 hurricane resistance). Our engineering team specified a 70mm profile depth with a 34mm thermal break and reinforced the inactive leaf with a heavy-duty shoot bolt system. The doors passed the ASTM E330 test at 250 km/h sustained wind pressure.

The order was shipped FCL directly from our China factory — 5 containers with custom-built internal racks to hold the doors vertically during transit. The packing list was sent to the buyer’s customs broker three days before vessel arrival, allowing for pre-clearance.

For smaller orders, we offer LCL consolidation with our own crating system. Each double door is individually wrapped, then placed in a wooden crate with internal bracing at the hinge and lock locations. The crates are engineered to be stackable, maximizing container space utilization.

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Conclusion & Next Steps

Sourcing entry double doors requires more than comparing prices. The material science, compliance requirements, and logistics planning determine whether your project stays on schedule and within budget.

• Evaluate materials based on structural, thermal, and maintenance requirements — not just appearance.
• Verify test reports for air, water, and wind resistance on the actual production configuration.
• Choose a supplier who can adapt the profile structure to your local building codes, not one who only offers a standard product.

If your project requires entry double doors and you need a manufacturing partner who can meet the technical standards discussed in this guide, reach out with your specifications.

Get a Free Quote

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References

[1] American Architectural Manufacturers Association. (2020). “AAMA 2605-20: Voluntary Specification, Performance Requirements and Test Procedures for Superior Performing Organic Coatings on Aluminum Extrusions and Panels.” AAMA.

[2] European Aluminium Association. (2019). “Thermal Break Profiles: Design and Performance Guidelines.” European Aluminium.

[3] Builders Hardware Manufacturers Association. (2018). “ANSI/BHMA A156.13-2018: American National Standard for Mortise Locks & Latches.” BHMA.

[4] International Code Council. (2021). “2021 International Building Code, Section 1010: Doors, Gates and Turnstiles.” ICC.

[5] Aluminum Anodizers Council. (2022). “Anodizing vs. Powder Coating: A Comparative Analysis for Architectural Applications.” AAC.