Choosing commercial interior doors involves more than selecting a style and size. For offices, multifamily buildings, hospitality spaces, institutional facilities, and other commercial environments, the door is part of a larger opening that has to work with the building, hardware, frame, and project requirements.
A door may need to handle frequent use, provide privacy, meet a specified fire-rating requirement, accommodate particular hardware, or fit a standardized package across dozens or hundreds of openings. Getting those details right before ordering can prevent costly changes later.
This guide walks through the major factors to consider when specifying commercial interior doors, from material and core construction to ratings, dimensions, hardware, durability, and installation planning.
What Makes a Door “Commercial”?
The term commercial door describes an application rather than one specific door construction.
Commercial doors may be used in offices, multifamily properties, hospitality environments, institutional buildings, and other higher-use applications. Depending on the project, the opening can have different requirements for durability, hardware, fire rating, frame type, and performance.
That means specifying a commercial interior door should begin with the project requirements rather than simply choosing a door from a catalog.
Practical tip: Start with the opening requirements, not the door style. Once the required size, core, rating, hardware, and configuration are established, the available door styles can be narrowed down.
For larger projects, it is also helpful to establish a consistent specification before ordering. This makes it easier for the project team, supplier, installer, and hardware provider to work from the same information.
1. Start With the Door Application
The first question should be: Where will the door be used and what will it need to do?
A door serving a private office may have different requirements than one used in an apartment building, corridor, hotel, or institutional space.
Consider:
- Building type
- Room or opening function
- Expected frequency of use
- Privacy requirements
- Noise considerations
- Required fire rating
- Hardware requirements
- Existing or planned frame
- Installation conditions
- Quantity of identical openings
The application helps determine which specifications matter most.
For example, a multifamily project may require a large number of consistent door openings with coordinated hardware and documented ratings. An office project may place greater emphasis on appearance, privacy, durability, and hardware compatibility.
The goal is not to specify the most elaborate door possible. It is to specify a door appropriate for the actual application.
2. Choose the Appropriate Door Construction
Commercial interior doors at Darpet are available in Hollow Metal, Birch, and Oak constructions. The appropriate material depends on the project, desired appearance, application, and specifications.
Hollow Metal Doors
Hollow metal doors provide a durable option for commercial applications where strength and long-term performance are important considerations. They are commonly associated with commercial and institutional environments and can be specified for openings where a more utilitarian or highly durable door construction is appropriate.
Birch Doors
Birch commercial doors provide a wood appearance while remaining suited to commercial applications. They can be a practical choice when the project calls for the appearance of a wood interior door rather than a metal door.
Oak Doors
Oak commercial doors provide the natural appearance and character of oak for projects where the door is an important part of the interior design. Oak can be particularly appropriate when the commercial space calls for a warmer, more architectural appearance.
Which Material Should You Choose?
The choice between Hollow Metal, Birch, and Oak should be based on the requirements of the specific project.
Consider:
- The intended application
- Desired appearance
- Expected use
- Project specifications
- Required performance characteristics
- Finish requirements
- Coordination with the surrounding interior
For projects with many openings, establishing the door material early can also help maintain consistency throughout the building.
Practical tip: Determine the required commercial door construction before selecting the final appearance and finish. The material should satisfy the project's functional requirements while also fitting the overall design.
3. Determine Whether a Fire Rating Is Required
Fire-rated doors require particular attention because the door cannot be evaluated independently from the requirements of the opening assembly.
For commercial and multifamily projects, the project documents may identify openings that require a specific fire-rated door assembly. The required rating should come from the applicable project specifications and code requirements rather than being assumed.
When a fire-rated door is being considered, verify the complete requirement with the appropriate architect, code professional, or project authority.
Important questions include:
- Is the opening required to be fire-rated?
- What rating is specified?
- Does the complete door assembly meet the project requirement?
- What frame is being used?
- What hardware is required?
- Are there additional requirements for seals or other components?
- Has the specified assembly been reviewed for the intended application?
Darpet's content strategy specifically identifies fire-rated doors as an important part of its commercial and multifamily offering, including applications where project-specific requirements need to be documented.
Important: A door being described as “commercial” does not automatically mean that it is fire-rated. Fire-rating requirements must be determined from the specific project and opening.
4. Verify Door Size and Configuration
Door size is another specification that should be established before ordering.
At minimum, the project team should document:
- Door height
- Door width
- Door thickness
- Single or double configuration
- Handing and swing where applicable
- Jamb requirements
- Frame or prehung configuration
For commercial projects, consistency is particularly important. If the same door configuration is being used throughout a building, the schedule should clearly identify the dimensions and configuration for each opening.
Double doors and other larger configurations also require additional planning. Opening dimensions, swing clearance, hardware, and frame configuration all need to work together.
A prehung configuration can simplify some aspects of installation because the door slab is supplied within a jamb system with hinge hardware prepared. A slab-only configuration, by comparison, requires the existing or separately supplied frame and hardware to be coordinated with the door.
5. Specify the Jamb and Frame Correctly
The door itself is only one part of the opening.
For prehung doors, the jamb needs to correspond to the wall construction. The correct jamb depth helps the frame fit the finished wall and allows the door assembly to be installed properly.
Before ordering, verify:
- Wall thickness
- Jamb depth
- Frame type
- Finished wall conditions
- Existing versus new construction
- Door swing
- Hardware preparation
This becomes particularly important during renovation projects where existing wall conditions may differ from current construction.
For new construction, jamb requirements should be coordinated with the wall assembly and other trades before the door package is finalized.
6. Coordinate Hardware Early
Hardware should not be treated as an afterthought.
Commercial door hardware can include:
- Hinges
- Locks
- Latches
- Door closers
- Other hardware components
- Hardware sets appropriate to the project
The door, frame, and hardware all have to work together. A change in hardware can affect machining, preparation, handing, or the way the opening operates.
The project's hardware specifications should therefore be reviewed before finalizing the door order.
Residential vs. Commercial Hardware
Commercial hardware may have different requirements from hardware used in a typical residential application. Project teams may need to consider expected usage, functionality, durability, accessibility, and project specifications.
For a commercial package, it is often more efficient to establish the hardware requirements alongside the door schedule rather than attempting to coordinate them after the doors have been ordered.
7. Consider Durability and Expected Use
Commercial interiors can experience significantly different patterns of use from individual residential rooms.
The right door specification depends on the environment.
Consider:
- How frequently the opening will be used
- Who will use the space
- Whether carts or equipment will pass through
- Whether the opening is in a common area or private room
- Expected maintenance requirements
- The desired service life of the installation
- Hardware duty and compatibility
Multifamily properties present their own considerations because the same specification may be repeated across many units.
For a property manager or contractor, consistency can make replacement and maintenance easier. A clearly documented door package also makes it easier to identify the appropriate replacement when an individual opening needs attention later.
8. Decide Between Slabs and Prehung Doors
Commercial doors can be supplied as door slabs or prehung units, and the appropriate configuration depends on the existing or planned opening.
Commercial Door Slabs
A commercial door slab is supplied as the door itself without the complete frame.
A slab may be appropriate when:
- An existing frame is being retained
- The project already has compatible frames
- The door is being replaced independently of the frame
- The installer is responsible for preparing and installing the door within the existing opening
When ordering a slab, the existing frame and opening conditions should be carefully verified to ensure that the replacement door is compatible with the opening.
Commercial Prehung Doors
Commercial prehung doors are supplied installed in a metal frame. This provides a coordinated door-and-frame assembly rather than supplying the door separately from the frame.
A commercial prehung configuration can be appropriate when:
- New frames are being installed
- The existing frame is being replaced
- Consistent door-and-frame assemblies are desired
- The project calls for a complete commercial opening
Because the door and metal frame are supplied as a coordinated unit, the frame dimensions, wall conditions, handing, swing, and hardware requirements should be established before ordering.
Practical tip: When specifying a commercial prehung door, do not treat the frame as a separate afterthought. The door and metal frame form the complete opening assembly and should be specified together.
9. Establish a Clear Door Schedule
For commercial and multifamily projects, a door schedule is one of the most useful organizational tools available.
A good door schedule can identify information such as:
| Specification | What to Document |
|---|---|
| Opening | Room, unit, or opening identification |
| Quantity | Number of identical openings |
| Door size | Height and width |
| Thickness | Door thickness |
| Configuration | Single, double, or other configuration |
| Style | Door design or model |
| Core | Hollow core, solid core, or specified construction |
| Rating | Required fire rating, when applicable |
| Frame | Existing, new, or prehung configuration |
| Jamb | Required jamb depth |
| Handing | Left/right or project-specific handing |
| Hardware | Hardware set or specified preparation |
| Finish | Paint-ready, painted, stained, or other specified finish |
| Notes | Special project requirements |
The exact fields should be adapted to the project, but the principle is simple: document the details before the order is placed.
This is especially important when a project contains many similar openings.
10. Coordinate Installation Before the Doors Arrive
Installation planning should begin before the doors are delivered.
Confirm that the installer has the information needed for:
- Rough openings
- Frame dimensions
- Door handing
- Swing direction
- Hardware preparation
- Frame conditions
- Finished wall thickness
- Required installation sequence
For prehung units, the rough opening needs to accommodate the complete jamb system and provide appropriate space for shimming, leveling, and adjustment.
A door package can be correctly manufactured and still create installation problems if the opening conditions have not been coordinated.
Practical tip: Have the door schedule, frame information, hardware requirements, and opening conditions reviewed together before production or ordering.
Commercial Door Specification Checklist
Before finalizing a commercial interior door package, review the following:
Project
- What type of building is this?
- Where will each door be installed?
- How many identical openings are there?
- Are there project-specific specifications?
Door
- What style is required?
- What height and width?
- What thickness?
- Hollow core or solid core?
- Slab or prehung?
- Single or double?
Rating
- Is a fire-rated opening required?
- What rating is specified?
- Has the complete assembly been verified for the application?
Frame
- What frame depth is required?
- Is the frame new or existing?
- What are the finished wall dimensions?
Hardware
- What hinges are required?
- What locks or latches?
- Are closers required?
- What hardware preparation is needed?
Installation
- Are rough openings correct?
- Are handing and swing documented?
- Are the door and hardware schedules coordinated?
- Does the installer have the necessary specifications?
Working With a Commercial Door Supplier
A commercial door supplier can be involved well before the final order is placed.
For contractors, architects, builders, and property managers, early coordination can help identify missing information before it becomes a production or installation issue.
Darpet's commercial door capabilities and product selection can support projects requiring coordinated doors, configurations, hardware, and related products. For larger projects, the most useful starting point is a complete specification rather than a single door dimension.
The more information available at the beginning, the easier it is to identify the appropriate door configuration and coordinate the rest of the opening.
Final Thoughts
Specifying commercial interior doors is ultimately an exercise in coordination.
The right specification considers the application, construction, core, fire-rating requirements, dimensions, frame, hardware, durability, and installation conditions together. A door should not be selected in isolation from the rest of the opening.
For commercial and multifamily projects, documenting these details in a clear door schedule can also make ordering, installation, replacement, and future maintenance easier.
Whether the project involves an office, apartment building, hospitality space, or another commercial application, start with the requirements of the opening and work outward from there.