The 28 × 80 prehung exterior door is a project-specific unit designed for narrow entryways and secondary access points. It arrives pre-assembled with hinges, sill, and weatherstripping, so on-site installation is faster. DERCHI manufactures these doors to order in four material families, with flexible hardware and glass combos, plus OEM/ODM and global shipping.
- Material selection: aluminum, steel, fiberglass, or wood, each suiting different cost and performance needs.
- Prehung assembly: left/right handing, inswing/outswing, continuous EPDM seal to reduce air and water infiltration.
- Typical applications: side entries, utility rooms, storage areas, and light commercial auxiliary entrances where space is tight.
- Project-based ordering from sample to container, with full factory support and worldwide logistics.
Product Details
Each 28 × 80 prehung door starts as a custom order. The slab measures 28 inches wide by 80 inches high (711 mm × 2032 mm), and we build it into a complete frame unit with butt hinges, a sill or threshold, and continuous EPDM weatherstripping. Standard door thickness is 1-3/4 inches; the recommended rough opening is 30 inches × 82½ inches.
Handing, swing direction, material—aluminum, steel, fiberglass, or wood—and glazing are all selected to match the project. Options like insulated, tempered, or decorative glass, multi-point locks, and surface finishes are finalized at the engineering stage. Because the unit ships ready to hang, builders spend less time on site. Narrow-wall openings and tight back-of-house entrances are where the prehung format pays off most.
Product Features
Ready-to-install delivery: The door arrives as a prehung assembly with hinges and sill, cutting field labor and alignment time compared to slab-only packages.
Custom material engineering: You aren’t locked into one material. DERCHI adapts the frame and slab from aluminum profiles (6063-T5 alloy available), galvanized steel, fiberglass composite, or solid wood—each matched to the performance goals of the project.
Performance standard alignment: We configure to meet NFRC, CE, AS2047, CSA, and IGCC requirements; test reports for the final build can be secured after spec lock.
Full-perimeter weather seal: Continuous EPDM gasketing around the frame reduces air leakage and water ingress, essential for exterior doors facing wind and rain.
OEM/ODM and branding: From small-sample prototypes to container loads, we handle private labeling, custom hardware integration, and after-sales parts supply.
Manufacturing scale: Over 25 years in door production within a 180,000 m² facility, shipping to over 100 countries via sea, land, or air.
Customizable Styles
Glazing: Insulated, Low-E, tempered, laminated, or decorative privacy glass; talk to us about double or triple glazing for higher thermal or acoustic performance.
Frame material: Aluminum, galvanized steel, fiberglass composite, or solid wood. Each requires compatible sub-frame and sill profiles for a successful prehung assembly.
Dimensions: Nominal 28" × 80" is the starting point. For similar narrow doors, panel widths from 600 mm to 850 mm and heights from 1800 mm to 2500 mm are within our swing door range.
Color & finish: Powder coating, anodizing, or any RAL color for metal; wood slabs can be stained or painted to match architectural specs.
Swing & handing: Specify left-hand or right-hand, inswing or outswing at order stage. Shop drawings confirm final orientation before production.
Hardware Accessories
Hinges: Stainless steel ball-bearing hinges with adjustable tension, finished to match the door hardware.
Handle set: Lever or knob with standard lockset bore preparation; compatible with most mortise and cylindrical lock bodies.
Multi-point locking (optional): Shoot-bolt or hook-bolt systems engage at top, bottom, and center, improving security and gasket compression.
Panic bar (optional): Factory-fitted push-bar device for commercial auxiliary exits, maintaining weather resistance and fast egress.
Door closer (optional): Surface-mounted or concealed closers regulate speed and latching; useful for staff-access doors in hotels and offices.
Basic Parameters
Performance Item | Available Information | Buyer Notes |
|---|---|---|
Thermal Insulation | Whole-door U-Factor must be tested; similar 36x80 aluminum model achieves 0.39 U-Factor with 5+12A+5 IG. | Request NFRC U-Factor test report for your exact 28×80 configuration with chosen glazing. |
Wind Pressure Resistance | Not pre-certified; depends on material and frame design. | Provide local wind load requirements so the frame can be engineered and tested accordingly. |
Water Tightness | EPDM gasketing and sill design contribute, but test data is configuration-specific. | Confirm water penetration rating (e.g., ASTM E331) based on material and opening direction. |
Air Tightness | Continuous weather stripping reduces leakage; actual values per test standard. | Request air leakage results (cfm/ft²) after final quote to verify energy code compliance. |
Sound Insulation | Glazing make-up and frame material influence STC; no standard listed value. | If acoustics matter, specify laminated or thicker glass and request acoustic test data. |
Product Specifications
Specification | Details |
|---|---|
Nominal Width | 28 inches (711 mm) |
Nominal Height | 80 inches (2032 mm) |
Recommended Rough Opening | 30" x 82½" (confirm with factory for exact jamb depth) |
Door Thickness | 1-3/4 inches (standard) |
Material Options | Aluminum, Steel, Fiberglass, Wood |
Aluminum Profile (example) | 6063-T5, 54 mm frame, 1.45 mm frame thickness, 1.2 mm leaf thickness (subject to confirmation) |
Glass Options | Insulated, tempered, Low-E, decorative, laminated |
U-Factor Example | 0.39 (36x80 model, 5+12A+5 IG) – not directly transferable; request 28×80 test report |
Swing Configuration | Left-hand / Right-hand, Inswing / Outswing |
Hardware Included | Hinges, handle, lockset bore; multi-point lock, panic bar, closer optional |
Sealing | EPDM rubber gasketing |
Finish | Powder coating, anodized, custom RAL; wood stain or paint on request |
Standards Configurability | Testing to NFRC, CE, AS2047, CSA available; cost and lead time confirmed with order |
Order Type | Custom / OEM / ODM / Project-based |
Trade Terms | FOB, CIF, DDP negotiable |
Advantages
25+ years of door manufacturing: DERCHI has produced entry doors since 1999, supplying distributors worldwide with consistent quality and on-time delivery.
180,000 m² Foshan factory: Over 100 production lines and about 600 staff support an annual output of 300,000 m², allowing us to handle both large-volume projects and small custom runs.
Project-specific engineering: The 28×80 door is built to your choice of material, hardware, glass, and finish—no stock inventory compromise.
Global logistics: We ship FOB, CIF, or DDP to 100+ countries, with packaged units prepared for your distribution channel.
Full OEM/ODM support: Prototypes, private-label packing, branded hardware, and after-sales parts are part of our standard B2B workflow.
Application Scenarios
Apartment: Ground-floor units often need a narrow side door for a patio or service yard. The prehung format allows a fast fit, and a glazed panel can bring daylight into a small entry without a wide door leaf.
Home Office: A dedicated exterior entrance for a consulting room raises curb appeal while meeting weather-seal requirements. Custom finish and hardware let it match the main building’s look.
Hotel: Back-of-house corridors benefit from compact service doors. If a panic bar or closer is needed, those can be factory-installed to reduce on-site disruption and keep the envelope tight.
Office Building: Mechanical and storage rooms often call for a 28-inch leaf; it fits tight hallway layouts and avoids costly wall modifications.
Outdoor: When you confirm the specific model is rated for full exterior exposure, this unit works as a secondary entry. Ask about weather rating and coating durability before finalizing.
Residential Building: Laundry, utility, and garage back doors in houses or multi-family blocks—where a wider door would waste wall space or block circulation paths.
Exterior: Covered porches or semi-outdoor corridors need a durable, insulated barrier that doesn’t overpower the facade. The 28×80 size fits discreetly while still insulating.
Villa: A custom secondary entrance for a luxury home. Fiberglass or clad wood, decorative glass, multi-point lock, and a premium finish put a high-end touch on a functional door.
FAQ
What is a 28 x 80 exterior door prehung?
It’s a project-specific pre-assembled exterior door with a 28-inch by 80-inch slab hung in its frame, complete with hinges, sill, and weatherstrip. Unlike stock doors, this unit is built to your material, handing, and hardware choices.
Where can this door be used?
Think narrow side entries, back doors, utility rooms, storage access, and small commercial auxiliary exits. Because the 28-inch nominal width may not satisfy primary egress codes, always verify local requirements before specifying it as a main exit.
Can I customize size, material, and swing?
Yes. You pick aluminum, steel, fiberglass, or wood; tell us left/right handing and inswing or outswing. Minor width and height adjustments are possible per project.
What information is needed for a quote?
Send project location, material, glass type, handing, hardware preferences, performance standards, and order quantity. Include rough opening dimensions and finish details for an accurate proposal.
Do you support B2B projects and OEM orders?
Absolutely. DERCHI works with distributors, contractors, and developers. OEM/ODM services cover private labeling, custom hardware, and production from prototyping to full containers.
What technical documents and test reports are available?
Test reports for NFRC U-Factor, air/water/wind performance, and impact ratings are procured after the final configuration is set. Installation drawings and CAD files follow once the order is placed.
What should I confirm before ordering?
Double-check that the 28-inch width meets local building codes for its intended use. Also confirm the weather resistance rating, applicable performance standard, and your exact rough opening/jamb depth.
How should I confirm certification, packaging, and shipping?
Certification needs are aligned during quoting; cost and timeline will be confirmed then. Packaging is custom (bulk or private-label carton), and trade terms—FOB, CIF, or DDP—are agreed with the sales team.
