Flush Hollow Metal Doors - Commercial Steel Doors (Single)

Flush hollow metal doors are a standard solution for schools, hospitals, warehouses, retail, and multi-tenant buildings. They provide a clean steel face and are designed to handle high traffic and demanding environments. Use this page to understand when to choose a flush steel door, how to measure and select frames, and how to order the right prep for your hardware.

Need help fast? Call 866-232-5673 or text photos to 210-275-8966.

Quick Links

• When to Use Flush Hollow Metal Doors
• Sizing, Rough Openings & Measuring
• Hollow Metal Door Frames (Wall Type Matters)
• Common Hardware for Flush Hollow Metal Doors
• Exterior Use, Galvannealed Steel & Durability
• Fire Rated Flush Hollow Metal Doors (When Required)
• How to Order or Quote a Flush Hollow Metal Door
• Related Hollow Metal Door Categories
• Install & Repair Guides
• Door Parts for Repairs & Retrofits

When to Use Flush Hollow Metal Doors

Choose a flush hollow metal door when you need a durable, commercial-grade steel door for a single opening. Flush doors are commonly specified because they work with most commercial hardware preps and provide long-term performance in high-traffic locations.

Common Applications

• Schools and universities
• Hospitals and medical facilities
• Warehouses and industrial buildings
• Retail and multi-tenant buildings
• Government and municipal facilities
• Back-of-house and staff openings

Flush vs Other Hollow Metal Door Options

• Flush doors - clean steel face, versatile for most commercial openings
• Vision lite doors - choose when visibility is required
• Louvered doors - choose when ventilation is needed
• Door pairs - choose when you need a wider double door opening

Sizing, Rough Openings & Measuring

Correct sizing is critical for a successful installation. If you are replacing an existing door or ordering for new construction, confirm the rough opening and frame requirements before quoting.

• How to Measure Hollow Metal Door Rough Opening
• Measuring Guide (Alternate)

For common sizes, shop by size: Hollow Metal Doors by Size.

Hollow Metal Door Frames (Wall Type Matters)

Frame selection affects fit, alignment, and long-term operation. Choose frames based on wall type (drywall, stud, block, brick, concrete), and whether the opening is new construction or a retrofit.

• Paint-Ready Steel Frames (Primer Gray)
• Drywall Frames
• New Metal or Wood Stud Wall Frames
• Masonry Knock-Down Frames
• Existing Block Wall Punch and Dimple Frames
• Existing Metal or Wood Stud Wall Punch and Dimple Frames

Want anchor guidance and install help? Start here: Hollow Metal Door Resources and Hollow Metal Door Anchor Types.

Common Hardware for Flush Hollow Metal Doors

Flush hollow metal doors are commonly used with commercial hardware. The key is ordering the correct prep and selecting hardware that matches door thickness (typically 1-3/4") and the opening requirements.

• Hardware Kits - fastest way to spec a complete opening
• Panic Bar Hardware
• Cylindrical Locks
• Door Hinges and Continuous Hinges
• Push and Pull Plates and Kick Plates

Exterior Use, Galvannealed Steel & Durability

Flush hollow metal doors can be used on exterior openings when the correct material and prep are selected. For exterior environments, galvannealed (A-60) steel is commonly chosen because it is corrosion resistant and paint-ready.

Galvannealed material is produced by applying a zinc coating and then annealing the sheet steel, resulting in a fine matte finish that resists rust and does not flake when formed, stamped, or bent. This makes it an excellent choice for exterior applications.

For more exterior guidance, see: Can Hollow Metal Doors Be Used on Exterior Openings?

Fire Rated Flush Hollow Metal Doors (When Required)

If the opening is part of a rated corridor, stairwell, or fire barrier, you may need a fire-rated door and frame assembly. Fire-rated requirements can affect door construction, labeling, and what hardware is permitted.

• Fire Rated Hollow Metal Doors
• Are Hollow Metal Doors Fire Rated?
• Are Hollow Metal Door Frames Fire Rated?
• What Is a 2 Hour Fire Door?

How to Order or Quote a Flush Hollow Metal Door

The fastest and most accurate way to order a flush hollow metal door is to use our quote tool. You can configure door size, handing, prep options, material selection, and hardware needs - then submit for pricing and lead time.

Build Your Own Flush Hollow Metal Door (Quote Tool)

What you should know before quoting

• Door size and handing
• Wall type (drywall, stud, block, brick, concrete)
• Fire-rated requirement (if applicable)
• Hardware type (lockset, panic hardware, closers, access control)

Prefer a packaged solution? Start here: Hollow Metal Door Packages.

Related Hollow Metal Door Categories

• Flush Hollow Metal Door Pairs (Double Doors)
• Vision Lite Hollow Metal Doors and Vision Lite Door Pairs
• Louvered Hollow Metal Doors and Louvered Door Pairs
• Fire Rated Hollow Metal Door Pairs

Install & Repair Guides

Need step-by-step help on frame installation and jobsite conditions? Start with our resources hub: Hollow Metal Door Resources.

• Install a hollow metal frame in a concrete wall
• Install a hollow metal drywall frame
• Install a door frame into a brick wall
• Install a steel door in an existing block wall

Need to identify parts visually? Use: Interactive Hollow Metal Door Repair + Video Guides

Door Parts for Repairs & Retrofits

If you are maintaining existing openings and need replacement parts, we stock commercial-grade components built for hollow metal doors.

• Shop Hollow Metal Door Parts
• Hardware Kits - common kits for faster ordering
• Hinges and Continuous Hinges
• Cylindrical Locks

Get Help Selecting the Right Flush Hollow Metal Door

Call 866-232-5673 or text 210-275-8966 with photos and measurements. We will help you confirm the right door configuration, frame type, and prep options.