The short answer

Swing doors belong on lockers, small interior units, and utility rooms. Roll-up doors cover everything else, from 5x10 interior units to drive-up rows, boat and RV spaces, and commercial openings up to 14' x 14'. Walk the hallways of most climate-controlled buildings and you'll see both.

If you landed here because a rental listing said "swing door," here's the difference. A swing door opens on hinges, like a closet door, and you'll usually find one on a 5x5 or a locker. A roll-up door lifts and coils above the opening allowing for larger item storage.

The rest of this guide is for the people choosing those doors. Owners, builders, and GCs working through a door schedule.

What is a swing door?

Picture a steel closet door with a storage latch. A swing door hangs on hinges and opens out into the hallway, so nothing needs to coil above the opening. That one trait is why swing doors show up in spots with tight headroom where a roll-up won't fit.

We build ours in two profiles. Corrugated doors match the look of a roll-up hallway. Flush doors give you a smooth, seamless face. Corrugated is often preferred due to it's ability to hide wear and tear over time.

• Corrugated: 26-gauge door face with 20-gauge Galvalume X-bracing
• Flush: 20-gauge flat door face with 20-gauge hemmed stiles and hat-style stiffeners
• Three chrome-plated hinges per door
• For interior use and ADA compliant
• 24 colors in siliconized polyester WeatherXL paint over a prime coat, subject to availability

Lockers are the best case for swing doors. Stack them two or three high and one 5x5 footprint becomes two or three rentable spaces, each behind its own door. Flush swing doors also close off mechanical rooms and supply closets. Full details are on the swing and locker door specs page.

What is a roll-up door?

A roll-up door is a steel curtain wound on a spring-loaded drum. When a tenant lifts the door, the curtain rides up the side guides and coils above the opening, out of the way. Drive-up units use them almost without exception, and so do most interior units 5x10 and up.

Our workhorse is the 9530 Series, built for standard self-storage openings up to 10' x 10'. The curtain is 26-gauge, Grade 80 prepainted steel running in 18-gauge galvanized guides with polyethylene strips, which keeps the door relatively quiet. Tension is set with a worm gear with no special tools needed. You can actually tension our doors with a screw driver.

Bigger openings, tight headroom, and wind-rated jobs each call for something different. So we build eight roll-up series, from 10' x 10' storage doors to 14' x 14' commercial doors. The full lineup is below.

Our 9530, 9570, 1240, 1250, and 1270 Series all carry a three-year door warranty, 35 years of no-fade paint coverage, and 40-year paint film integrity. Building climate-controlled? Each of those series offers insulated options.

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Where swing doors win

Lockers. The obvious one. At locker sizes, stacked two or three high, a hinged door is the practical choice.

Small interior units. Somebody renting a 5x5 is carrying in bins and boxes, not a couch. A swing door gives them full access. Spread across 40 or 50 small units, fewer springs and drums also means less for your maintenance crew to service.

Low or blocked headroom. Every GC has seen this one. The plans look clean, then ductwork, sprinkler lines, and a beam end up exactly where the roll-up coil was supposed to go. A swing door fits under all of it. Want to keep a roll-up on a larger opening? Ask us about the 9540, built for low-headroom applications.

Utility rooms. Nobody rents the mechanical room, but it still needs a secure door. A flush swing door closes off the space and matches the rest of the hallway.

One thing to watch. Swing doors open outward, into the corridor, so leave enough width for a cart or a wheelchair to get past an open door.

Where roll-up doors win

Drive-up and exterior units. Our swing doors are rated for interior use only, so every drive-up unit gets a roll-up door.

Units 5x10 and larger. Tenants in these units are moving dressers, appliances, and loaded hand trucks. They need the full width of the opening, and a roll-up door gives them exactly that before tucking away overhead.

Boat, RV, and commercial openings. Our 1270 Series handles openings up to 14' x 14'. Pick a 4:1 or 8:1 chain hoist, or add a motor for hands-free operation.

Narrow hallways. No swing space required. Open every door on the run and the corridor is still clear.

Jobs that call for wind-rated doors. A door without a wind rating still works outdoors. The rating matters when a coastal job or local code requires doors tested to specific design pressures. For those jobs, look at the 9570-LA or the 1250.

A uniform look. When a prospective tenant tours the building, a long run of matching roll-up doors looks clean and well kept.

Choosing the right roll-up series

Start with the opening size. Then check headroom and whether the job calls for wind-rated doors.

Self-storage doors

• 9530: Up to 10' x 10'. Our standard self-storage door, with 9.5-inch drums on a live axle.
• 9540: Up to 12' x 14'. A dead axle door for larger openings with low headroom.
• 9550-LA: Up to 10' x 10'. Adds 12-gauge J-clip wind locks and a 12-gauge windbar inside 3.5-inch, 14-gauge guides.
• 9570-LA: Up to 10' x 10'. Wind rated from +16.7/-19.0 PSF on a 10' wide door to +31.1/-35.3 PSF on a 6' wide door, with no wind locks. PE-stamped drawings show compliance with the current Florida Building Code and IBC/IRC 2018 (Texas). See the 9570 specs.
• 9570-DA: Up to 12' x 14'. A dead axle version with 3.5-inch, 14-gauge guides for larger storage openings.

Commercial, boat, and RV doors

• 1240: Up to 12' x 14'. Light commercial work, including pole barns, parking garages, and warehouses.
• 1250: Up to 14' x 14'. 12-gauge J-clips every 6-1/2 inches, with wind ratings from +15.9/-18 PSF to +53.9/-61 PSF depending on door width.
• 1270: Up to 14' x 14'. Our largest door, built for boats, RVs, and big commercial openings.

Planning a building with both

Most climate-controlled buildings use both door types. A typical interior floor puts roll-up doors on 5x10 and larger units, swing or locker doors on 5x5 and smaller units, and flush swing doors on utility rooms.

Before your door schedule is final, answer four questions:

1. What does your unit mix call for? Start with small units and lockers. Their count sets your swing and locker door order.
2. Where do ducts, sprinklers, and beams cross the hallways? Map headroom early with your architect. Tight spots point to a swing door or the 9540. A conflict found during install costs far more than one found on paper.
3. How wide are the corridors? Swing doors need clear width when open. Roll-up doors don't.
4. Does the job require wind-rated doors? If the spec or local code calls for tested design pressures, plan on the 9570-LA or 1250 for those openings.

Our advice: spec doors, partitions, and corner guards together as one hallway system. Colors and hardware stay consistent across door types, and one supplier covers the whole run. If you run into issues during the design stage, feel free to reach out to our team and we can help you and your architect work through challenges.

Frequently asked questions

What is a swing door storage unit? A unit with a hinged door instead of a roll-up. Most are small interior units, usually 5x5s and lockers.

Are swing doors more secure than roll-up doors? Not by default. Security comes down to how the door is built: steel gauge, bracing, pry points, and the latch. Check those on any door you spec, swing or roll-up.

Which door works best on a 5x5 unit? Both work. Pick a swing door when headroom is tight or you're stacking lockers. Pick a roll-up if you want your 5x5s to match the rest of a roll-up hallway.

Do swing doors work on exterior units? Not ours. SteelBlue swing and locker doors are rated for interior use. Put a roll-up door on anything exterior or drive-up.

Does a roll-up door need a wind rating to go outside? No. A door without a wind rating still works on exterior units. The rating matters when a job or local code requires doors tested to specific design pressures. For those openings, look at the 9570-LA or the 1250.

What's the largest roll-up door SteelBlue makes? The 1250 and 1270 Series both handle openings up to 14' x 14'.

Are these doors ADA compliant? Yes, with the right setup. Our swing doors are ADA compliant for interior use. For roll-up doors, our ADA kit adds a 3 to 4 foot pull rope. The ADA requires 5% of your first 200 units, and 2% of units beyond 200, to be accessible. Our ADA guide for storage doors covers the details.

Plan your door mix with SteelBlue

Send us your unit mix and a floor plan, and we'll walk through each opening with you. Swing, locker, or roll-up. Prefer the phone? Call 412-857-3496, or start a conversation here.