Arch Doors Exterior: A B2B Sourcing Guide for Double Entry Units

14 min read

When a contractor in Houston calls about an arched entryway that measures 74 inches wide by 97 inches tall, the first question is rarely about the wood species. It is about whether the factory can build a curved frame that will not leak water at the apex five years from now. Arch doors exterior units are not just rectangular doors with a curved top added for looks. The geometry changes everything — the frame joinery, the weatherstripping path, the glass support, and the hardware load.

This guide is written for buyers who need to source these units in volume: architects specifying a custom home package, general contractors managing a 40-unit development, and importers evaluating factories for a long-term supply agreement. You will not find decorating tips here. You will find the technical parameters that separate a door that performs from one that generates callbacks.

Understanding Arch Doors Exterior: Types and Applications

Arch doors exterior units fall into two primary geometric categories: the radius top and the segmental arch. A radius top, also called a half-circle arch, forms a perfect 180-degree curve. A segmental arch is shallower, with a curve that spans less than half of a circle. The distinction matters because it changes how the frame is fabricated and how the glass lites are cut.

The radius top is the more common specification for luxury residential entryways. It reads as a grand, classical gesture and pairs well with tall 8-foot door heights. The segmental arch is more subtle, often used in craftsman-style homes or commercial applications where the exterior elevation calls for a softer line without the full drama of a half-circle.

Within these geometries, the door configuration is almost always a double unit. A single arch door is structurally possible, but the proportions look awkward at standard entry widths. The double configuration — two leaves under one curved header — is the default for arch doors exterior in the U.S. market. Each leaf is typically 2 feet 6 inches to 3 feet wide, with the total unit spanning 5 to 6 feet.

The applications break down into three categories:

• Residential custom builds: High-end single-family homes where the entry is a statement piece. Materials lean toward solid wood — mahogany, flemish, or oak — with divided lites and premium hardware.
• Multi-family and hospitality: Townhome developments, boutique hotels, and resort properties. Fiberglass is common here for its dimensional stability and lower maintenance cost over the building’s life.
• Commercial and institutional: Buildings that need a monumental entry without the maintenance burden of wood. Thermal-break aluminum frames with large glass lites are the standard specification.

Each application drives a different material and performance requirement. The buyer who skips this analysis and orders on appearance alone will pay for it in the first year of weather exposure.

Quality and Performance Factors in Arch Doors Exterior Units

The curved header is where most quality problems begin. A straight door frame has simple 45-degree miter joints at the corners. An arch frame requires the header to be laminated or bent to the radius, and the joint where the curved header meets the vertical jamb is a stress point. Wood moves with humidity changes; the curved section moves differently from the straight jamb. Over time, this differential movement opens gaps in the joint if the construction method is inadequate.

The water infiltration risk is highest at the apex of the arch. On a straight door, water runs down the head and is shed by the drip cap. On an arch, water flows along the curve and pools at the crown before finding any path downward. If the weatherstripping does not follow the curve perfectly, water will find the seam.

Factory testing protocols exist for exactly this reason. The relevant standards are ASTM E283 for air leakage, ASTM E547 for water penetration under cyclic static pressure, and ASTM E330 for structural wind load. A factory that tests its arch units to these standards can provide a test report. A factory that cannot — or will not — is asking the buyer to accept the risk on faith.

The glazing is the second performance factor. Curved lites are manufactured one of two ways: bent glass, where a flat pane is heated and sagged into a curved mold, or segmented flat lites, where multiple flat panes are joined at angles to approximate the curve. Bent glass is more expensive and has a longer lead time, but it provides an uninterrupted sightline. Segmented lites are more affordable but introduce mullion lines that interrupt the arch’s visual flow.

Buyers should also specify the glass coating. Low-E (low-emissivity) glass has a microscopic metallic coating that reflects infrared heat while allowing visible light to pass. In a double-glazed unit with argon gas fill, low-E glass can reduce U-factor to around 0.28 to 0.30, which meets ENERGY STAR criteria for most climate zones. For hurricane-prone regions, laminated impact glass is required — typically meeting Miami-Dade County or Texas Department of Insurance standards.

How to Evaluate Arch Doors Exterior Suppliers

The supplier evaluation framework for arch doors is different from standard door sourcing. The curved frame introduces manufacturing complexity that not every factory can handle competently. Here is the qualification checklist:

Manufacturing capability: Ask whether the curved frame is produced in-house or outsourced. A factory that outsources the arch component has less control over quality and lead time. In-house production with dedicated CNC machining for the arch pattern is the stronger answer.

Testing infrastructure: Request test reports for air-tightness, water-tightness, and wind resistance. These should be ASTM standard tests performed on the actual arch configuration, not on a straight-door version of the same product line.

Customization depth: Arch doors are rarely a standard catalog item. The buyer needs a factory that can adjust the radius, the lite pattern, the jamb depth, and the hardware without imposing punitive minimum order quantities.

Export documentation: For international buyers, the factory must provide a packing list, proforma invoice, and full customs documentation. Missing paperwork at the destination port is a costly delay.

Logistics experience: Confirm the factory handles both FCL (full container load) and LCL (less than container load) shipments. For arch doors, packing quality matters — the curved frames are vulnerable to damage if not properly crated.

Red Flags: Avoid Suppliers Who…

• Cannot produce a test report for water penetration on an arched unit. The curved geometry is precisely where water intrusion happens, and a factory without test data is guessing.
• Quote a price without asking for the arch radius and jamb depth. These two parameters drive material cost and fabrication time.
• Offer a standard arch door “off the shelf” without discussing the rough opening. Arch openings are frequently out of square, and a factory that does not ask about site conditions is setting up a field-fit problem.

Questions to Ask Before Ordering

• Do you manufacture the curved frame in-house, or is it subcontracted?
• Can you provide ASTM E283, E547, and E330 test reports for your arch door configuration?
• What is your jamb depth range — can you build 6-9/16″ for 2×6 walls?
• How do you handle the glazing for the curved lite — bent glass or segmented?
• What is the lead time for a custom radius that is not in your standard pattern library?
• Do you provide pre-shipment inspection reports with photo documentation?

Key Quality Indicators for Arch Doors Exterior Buyers

Beyond the test reports, there are visual and dimensional indicators that separate a precision-built arch door from a loosely assembled one.

Joint alignment: Where the curved header meets the vertical jamb, the joint should be tight with no visible gap. On wood doors, the grain should be matched at the joint. On fiberglass, the seam should be invisible under the factory finish.

Weatherstripping path: The weatherstripping should follow the arch contour without kinks or gaps. A common shortcut is to use straight weatherstripping on the vertical jambs and a separate curved piece at the header — the transition point is where leaks occur.

Hardware weight rating: Arch doors are often taller than standard doors. An 8-foot door leaf weighs more than a 6-foot 8-inch leaf. Hinges must be rated for the additional weight — typically four hinges per leaf for tall arch doors, not the standard three.

Glazing bead design: The glazing bead that holds the glass in place should be mechanically fastened, not just adhesive-set. For entry doors, interior glazing (glass installed from the inside) is more secure than exterior glazing, which can be pried out by an intruder.

Finish quality: On wood doors, the finish should be uniform with no bare spots at the curved sections. The end grain of the arch is a vulnerable point for moisture absorption — it should be sealed with a primer or finish coat before shipment.

Relevant Industry Standards and Certifications

The following standards apply to arch doors exterior units. A supplier should be able to reference these in their documentation:

For fire-rated applications, wood arch doors are generally not compliant. Fire-rated exterior doors require fiberglass or steel construction with approved hardware. Buyers should confirm fire-rating requirements before specifying material — a wood arch door that looks perfect on the elevation will fail an inspection if the project requires a 45-minute rating.

Our Exterior Manufacturing Capabilities at Jusen Door and Windows

Here is how the factory-direct model applies to arch doors exterior. As a manufacturer, our approach to the curved frame challenge is to control the entire production process in-house — from the CNC machining of the arch pattern to the final weatherstripping adhesion. We do not outsource the curved component because that is precisely where quality is won or lost.

Our production line handles solid wood (mahogany, flemish, oak), fiberglass, and thermal-break aluminum arch door units. Each material requires a different fabrication approach:

• Solid wood arches are built from laminated segments that are CNC-machined to the specified radius. The lamination process prevents the warping that occurs when a single piece of wood is bent to a curve. After lamination, the arch is sanded and finished with a moisture-resistant primer.
• Fiberglass arches are molded to the radius with a wood-grain texture that can be painted or stained. The material does not expand or contract with humidity like wood, making it the dimensional-stability leader for tall 8-foot units.
• Thermal-break aluminum arches are extruded and bent to the radius, then powder-coated. This is the commercial-grade option for wide spans and high wind-load requirements.

Every arch door unit we ship undergoes pre-shipment inspection for air-tightness, water-tightness, and wind resistance. These are not cosmetic checks — they are functional tests performed on the assembled unit with the glazing and hardware installed. The test results are documented and shared with the buyer before packing.

Production Process: From Raw Material to Finished Arch Door

The production process for an arch door unit follows a specific sequence, and each step carries quality implications.

Step 1: Material conditioning. For solid wood, the lumber is kiln-dried to a moisture content of 8-12% and then acclimated to the factory environment. Wood that is not properly conditioned will move after installation, opening gaps at the arch joints.

Step 2: Arch pattern fabrication. The radius is programmed into the CNC machine. The curved header is cut from laminated stock, with the grain direction oriented to minimize movement. The jamb-to-header joint is machined for a precise fit.

Step 3: Frame assembly. The frame is assembled with waterproof adhesives and mechanical fasteners. The corner joints are reinforced with dowels or metal brackets — this is not a butt joint held by glue alone.

Step 4: Glazing. The glass lites are set with setting blocks and shims to prevent glass-to-frame contact. The glazing bead is installed and sealed. For curved lites, the glass is either bent to the radius or segmented, depending on the specification.

Step 5: Hardware installation. Hinges, locks, flush bolts, and weatherstripping are installed. The door leaves are hung in the frame to verify alignment and function.

Step 6: Finishing. Wood doors receive a primer coat. Fiberglass doors receive a factory-applied finish that can be painted or stained in the field. Aluminum doors are powder-coated.

Step 7: Testing. The assembled unit is tested for air leakage and water penetration. Dimensional checks verify the arch radius, width, height, and squareness against the approved drawings.

Step 8: Packing. Arch door units are crated with edge protection on the curved frame. The crating is designed for container shipping — either FCL or LCL.

Quality Control: Our Multi-Stage Inspection Process

The inspection process at Jusen covers every stage from material intake to final packing. The key checkpoints are:

• Incoming material inspection: Lumber moisture content, glass coating verification, hardware finish quality.
• In-process inspection: Arch pattern accuracy against the approved drawing, joint fit, glazing bead alignment.
• Pre-shipment inspection: The full ASTM test sequence — air-tightness, water-tightness, and wind resistance — plus dimensional verification and hardware function testing.
• Photo documentation: Every unit is photographed at each inspection stage, and the photos are shared with the buyer.

Third-party inspection is available on request. Buyers can nominate SGS, BV, or their own inspector to be present at the pre-shipment stage.

Customization and OEM/ODM Options

Arch doors exterior units are rarely a pure catalog purchase. The buyer typically needs one or more of the following customizations:

• Arch radius: Half-circle or segmental, with a specific rise-to-span ratio.
• Lite pattern: 6-lite flemish, full-lite, 1-lite with metal slats, or a custom divided-light pattern.
• Glass specification: Clear low-E, tinted, impact-rated, or decorative glass.
• Jamb depth: 4-9/16″ for 2×4 walls or 6-9/16″ for 2×6 walls.
• Hardware: Standard aluminum or premium wrought iron (Tiffany-style) — the hardware grade can double the hardware line-item cost.
• Frame color: For aluminum units, any powder-coat color; for wood, any stain or paint color.

The sourcing models we support are:

• OEM: The buyer provides the design or drawing. We manufacture to the exact specification. This is the right model for contractors and distributors with established product specs.
• ODM: Our design team adapts an existing arch door pattern to the buyer’s requirements. This is for importers who need a new design without the engineering investment.
• Private label: We produce arch door units under the buyer’s brand name. The packaging, documentation, and product labeling all carry the buyer’s brand.

Ordering Process: MOQ, Lead Time, and Shipping

The ordering process for arch doors exterior follows a standard sequence:

• Inquiry and specification: The buyer provides the rough opening dimensions, arch radius, lite pattern, material, and glass specification. Drawings are preferred but not required.
• Production drawings: We prepare production drawings for approval. This is the critical step — the arch radius and jamb depth must be confirmed before production begins.
• Sample or pre-production unit: For new designs, a sample unit is recommended. This verifies the arch pattern, finish, and hardware before committing to a full production run.
• Production: The standard production run for 20-50 units takes 30-45 days. Sample orders take 15-25 days. Large container orders (100+ units) may take 45-60 days.
• Inspection and packing: Pre-shipment testing and photo documentation are completed before packing.
• Shipping: FCL for bulk orders, LCL for samples and small orders. Sea freight from China to the U.S. West Coast is 15-20 days; to the East Coast, 25-35 days.

Choose A if… Choose B if…

• Choose solid wood if the project demands a traditional aesthetic and the budget allows for a premium material. Mahogany is the most rot-resistant wood species for exterior use.
• Choose fiberglass if the project is in a coastal or high-humidity climate, or if the door height exceeds 8 feet. Fiberglass will not warp, rot, or expand like wood.
• Choose thermal-break aluminum if the project is commercial, requires a wide span, or demands specific wind-load performance.

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An imperfect insight about this category: arch doors are not always the most practical choice. The curved frame is a permanent maintenance consideration — the weatherstripping will need periodic replacement, and the arch joint should be inspected annually. For some projects, a rectangular door with a transom above achieves a similar visual effect with simpler weather sealing. But when the architectural design calls for the arch, the buyer’s job is to source a unit that will perform for decades.

The factory you choose determines whether that performance is achieved.

As a direct factory supplier, Jusen Door and Windows Manufacturing Co., Ltd. combines full customization on arch radius, lite pattern, glass type, and hardware with pre-shipment testing for air-tightness, water-tightness, and wind resistance. Our foreign trade team provides complete export documentation — packing list, proforma invoice, and customs paperwork — for smooth clearance at the destination port. We adjust profile structure and fittings to match the building codes of your target market.

If you have a project in the pipeline, send your drawings or rough opening measurements. We will review the production feasibility and provide pricing.

Get a Free Quote

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References

[1] ASTM E283-19, Standard Test Method for Determining Rate of Air Leakage Through Exterior Windows, Skylights, Curtain Walls, and Doors Under Specified Pressure Differences Across the Specimen. https://www.astm.org/e0283-19.html

[2] ASTM E547-00(2016), Standard Test Method for Water Penetration of Exterior Windows, Skylights, Doors, and Curtain Walls by Cyclic Static Air Pressure Difference. https://www.astm.org/e0547-00r16.html

[3] ASTM E330/E330M-14, Standard Test Method for Structural Performance of Exterior Windows, Skylights, Doors and Curtain Walls by Uniform Static Air Pressure Difference. https://www.astm.org/e0330_e0330m-14.html

[4] International Residential Code (IRC), Section R311 — Means of Egress. https://codes.iccsafe.org/content/IRC2021P1/chapter-3-building-planning

[5] International Building Code (IBC), Section 1010 — Doors, Gates and Turnstiles. https://codes.iccsafe.org/content/IBC2021P1/chapter-10-means-of-egress

[6] ENERGY STAR Program Requirements for Residential Windows, Doors, and Skylights. https://www.energystar.gov/products/windows_doors_and_skylights

[7] ISO 9001:2015, Quality management systems — Requirements. https://www.iso.org/standard/62085.html