Rolling steel and sectional doors both close a big opening. They are built differently, need room in different places, and wear differently under daily use. Here is how we help owners and facility managers in Dallas-Fort Worth and North Texas sort out which one fits.
How each door is built and how it opens
Rolling steel doors
A rolling steel door is a curtain of narrow, interlocking steel slats. When it opens, the curtain winds around a barrel above the opening, a lot like a window shade.
The barrel holds the springs that balance the curtain's weight, and a steel hood usually covers the coil. The ends of the curtain ride in vertical guides on each side of the opening, and a heavy bottom bar with a rubber seal closes against the floor.
Rolling doors can run by hand, with a chain hoist, with a crank, or with a motor operator. Larger doors almost always need a hoist or a motor.
Sectional doors
A sectional door is made of wide horizontal panels joined by hinges. Rollers on the panel edges ride in tracks that run up each side of the opening and then turn back along the ceiling.
When the door opens, the panels travel up and back until the door sits overhead. Springs on a shaft above the opening balance the weight. In taller buildings, the track can run higher up the wall before it turns, or go straight up so the door never lies under the ceiling.
Space around the opening
Before we talk about door types, we look at how much room you have.
Headroom
Headroom is the clear space between the top of the opening and the lowest thing above it, such as a beam, pipe, light, heater or sprinkler line.
A rolling door needs headroom for the coiled curtain and hood. A sectional door needs room for the springs, the curve in the track and often the operator. When headroom is tight, a rolling door will often fit where a standard sectional track will not.
Sideroom
Sideroom is the wall space on the left and right of the opening. Both door types need some for guides or tracks and their brackets.
Rolling doors usually need a little more on the side where the hoist, crank or motor mounts.
Backroom
Backroom is the clear depth from the opening back into the building. This is where the two doors differ most.
A sectional door on a standard track needs clear ceiling depth of roughly the door's height plus some extra, and more for a ceiling-mounted operator. Racking, cranes, mezzanines and ductwork in that path can rule it out.
A rolling door needs almost no backroom. Everything stays in the coil above the opening, so the space behind the door stays free for racking, cranes and equipment.
Traffic, cycles and springs
A cycle is one full open and one full close. Count how many times the door runs on a busy day, not a slow one.
Springs are rated for a certain number of cycles before they wear out. Standard springs suit doors that run a few times a day. Higher-cycle springs are built heavier to last through more cycles, and both door types can be ordered with them.
On a busy door, they are worth asking about, since every spring replacement takes the door out of service. Cables, rollers, hinges, bearings, seals and the operator all wear with cycles too.
If a spring or cable breaks, keep the door closed, keep people clear, and call a trained technician. Do not try to wind, release or adjust spring tension yourself.
For more, see our post on broken garage door springs.
Forklifts, trucks and impact damage
In a warehouse or loading area, doors get hit. A forklift catches the bottom bar, or someone drives through before the door is all the way up.
What usually gets damaged on a rolling door
- Bottom bar: it hangs lowest, so it takes the most hits. A bent bar can keep the door from sealing or closing evenly.
- Slats: dented slats can bind in the guides. Damaged slats can often be replaced without replacing the whole curtain.
- Guides: a bent guide pinches the curtain and can stop the door. Guides can usually be straightened or replaced.
What usually gets damaged on a sectional door
- Bottom section: like the bottom bar on a rolling door, it takes the most hits.
- Other panels: a dented panel can crack at the hinges or bind. Single sections can usually be replaced.
- Tracks, rollers and hinges: a bent track can throw rollers and leave the door crooked or stuck.
A crooked or jammed door is under strain. Do not force it open or closed by hand or with a forklift. Keep people clear and call for service.
Bollards or guard posts in front of the guides or tracks, and drivers who wait for the door to open fully, prevent a lot of these repairs.
Insulation and North Texas heat
If your space is air conditioned or holds products that should not bake, insulation matters. A bare steel door facing south or west soaks up sun all afternoon in a North Texas summer and radiates that heat inside.
Sectional doors are the more common choice when temperature control is the priority. Insulated sections have a foam core between steel skins, and the panels close tightly against each other and the weatherstripping.
Rolling steel doors can be ordered with insulated slats too. They help, but a coiling door has more places for air to move, at the guides, hood and bottom bar. Brush seals, a hood baffle and a good bottom seal cut down on leaks.
Either way, worn seals let in hot air, dust, water and pests no matter how well the door is insulated.
Daylight and windows
Sectional doors can include a row of window sections, or be built as full-view doors with glass or clear panels. In a service bay, that brings in daylight and lets people see outside before the door opens.
Rolling steel curtains are mostly solid. Some offer small vision openings or perforated slats, but they let in far less light.
Security
A rolling steel door closes with an all-steel curtain held in steel guides. With no glass and few exposed parts, it is a hard door to get through, which is why you see them on loading docks and storage rooms.
Solid steel sectional doors with good locks can be secure too. Windows and lighter panels make a sectional door easier to break through than a heavy rolling curtain.
If a motorized door also has a manual lock, ask about an interlock that keeps the operator from running while the door is locked. The walk-in door matters as well, and we also install and repair commercial steel entry doors.
Wind and weather
North Texas gets strong storm winds. A large door under wind pressure can flex, bow, or pull out of its tracks or guides if it is not built for the load.
Some doors are designed and tested to resist specific wind loads. Rolling doors can use wind locks on the slat ends to help hold the curtain in the guides. Sectional doors can use heavier panels and reinforcing struts.
Whether your building needs a wind-rated door depends on its location, size, use and local requirements. Check with your city building department.
Operators and controls
A motor operator opens and closes the door so nobody has to pull a chain or lift it by hand.
- Side-mount or hoist operators: mount beside or above the door and drive the barrel or shaft. Common on rolling doors and on sectional doors with high-lift or vertical track.
- Trolley operators: mount to the ceiling behind a sectional door and pull it along a rail. They need backroom.
- Wall stations: open, close and stop buttons, mounted where the person pressing them can see the door.
- Remotes and keypads: handy for drivers and after-hours access.
Adding a motor to a chain-hoist door
Many manual rolling and sectional doors can take an operator later. First, we check that the door is in good shape, balanced and running smoothly by hand. A motor will not fix a door that binds or is out of balance. It will just wear out faster.
We also look at the power available, where the operator can mount, and where the wall station should go. Most operators have a way to run the door by hand during a power outage, and we show your crew how it works.
Safety devices and UL 325
UL 325 is the safety standard for door and gate operators. It covers how a motorized door protects people and equipment from being caught under it as it closes.
- Photo eyes: a pair of sensors near the floor on each side of the opening. If something breaks the beam while the door is closing, the door stops and reverses.
- Sensing edges: a strip along the bottom bar or bottom section. If it touches something while closing, the door stops and reverses.
Which devices a door needs depends on the operator and how it is controlled. We set this up when we install an operator and check it when we service one.
- Keep photo eye lenses clean and lined up.
- Have a torn or crushed sensing edge replaced.
- Never tape over, unplug or bypass a safety device to get a door to close.
- If the door stops reversing when it should, take it out of service and call for repair.
Fire-rated rolling doors
Some openings, such as those in fire-rated walls, call for a fire-rated door. Fire-rated overhead doors are typically rolling steel doors designed to close on their own when an alarm signals or heat triggers a release.
Fire doors have their own inspection and testing requirements, separate from regular service. Your fire marshal or insurer can confirm what applies to your building and how often the door needs to be checked.
Day to day, keep the path of a fire door clear. Do not park pallets, carts or equipment under it, and do not tie it or block it open.
Maintenance habits that extend door life
Commercial doors last longer when someone pays attention to them:
- Watch and listen. New grinding, popping or jerking, or a door that drifts down when it should stay up, are early warnings.
- Look at cables, rollers and guides. Have frayed cables, wobbly rollers and bent guides checked soon.
- Keep tracks and guides clear. Shrink wrap and pallet scraps get caught and cause binding.
- Check the seals. Replace torn seals before heat and rain get in.
- Open the door all the way. Partly open doors are the ones that get hit.
- Schedule periodic service. A trained technician can lubricate, adjust and inspect parts that staff should not handle.
Leave springs, cables, drums and the barrel alone. These parts hold a lot of stored energy, and working on them takes training and the right tools.
What drives the cost
We do not list prices here because every opening is different. These factors move the price up or down:
- Size: bigger doors use more material and heavier hardware.
- Insulation: insulated panels or slats cost more than single-skin steel.
- Operator: a motor adds cost over a manual door, and heavier-duty operators cost more than lighter ones.
- Cycle rating: higher-cycle springs and heavier parts add to the price.
- Windows, wind rating and fire rating: each adds parts, testing or labor.
- Installation conditions: wall and jamb material, headroom, removing the old door, running power, lift access, and working around a business that stays open.
For the same opening, a basic sectional door often costs less than a rolling steel door, but options change that quickly.
Common building types around DFW
Across Dallas-Fort Worth and North Texas, these buildings come up most often:
- Warehouses: lots of cycles, forklift traffic and racking near the walls. Rolling steel is common, especially where racking leaves no backroom.
- Manufacturing plants: large openings, overhead cranes and heavy equipment. Headroom and backroom often decide the door.
- Service bays and fleet shops: often air conditioned, with techs who like daylight. Insulated sectional doors with windows are a frequent fit.
- Loading areas: high cycles, trailer traffic and security concerns. Heavy rolling or sectional doors both work, with good seals.
- Metal shop buildings: from Sherman and Denison down to Princeton and Forney, owners choose either type based on ceiling height and use.
Our Dallas doors and gates page has more about our work in the city.
Decision checklist
Rolling steel is likely the better fit if:
- Headroom is tight, or racking, cranes or ductwork fill the space behind the door.
- The door runs many times a day.
- Forklifts, trucks or trailers work close to the opening.
- Security matters more than daylight.
- The opening calls for a fire-rated overhead door.
Sectional is likely the better fit if:
- You have clear ceiling depth behind the opening.
- The space is air conditioned or heated.
- You want windows for daylight and visibility.
- Traffic is moderate and hits are rare.
- Up-front price is a big factor and the door will not take heavy abuse.
Either way, ask about higher-cycle springs on busy doors, the right safety devices for the operator, and guards where vehicles pass.
What to measure and photograph before you call
Take these from the floor or a safe ladder, away from springs and damaged parts.
Measure:
- Width and height of the opening.
- Headroom, from the top of the opening to the lowest thing above it.
- Sideroom on the left and on the right, to the nearest wall, column or obstruction.
- Backroom, the clear depth into the building, and what is in the way.
- What the jambs and header are made of, such as steel, concrete, block or wood.
Photograph:
- The whole door from inside and outside.
- The area above the opening, including the coil or springs and anything mounted nearby.
- Both sides of the opening, close enough to see the guides or tracks.
- Any damage to slats, panels, the bottom bar, guides or tracks.
- The operator, its label and the wall station, if the door has a motor.
Also tell us how many times the door runs on a busy day, whether the space is cooled, and whether there is power near the door.
If the door is jammed or a spring is broken, a photo from the floor is enough. Do not climb near it for a better shot.
Get a recommendation from us
Pro Doors and Gates is a family-owned company based at 1940 Everheart Rd in Bells, Texas. We install and repair rolling steel and sectional overhead doors, springs, cables, operators, photo eyes and safety edges across Dallas-Fort Worth and North Texas.
Call us at (903) 294-1846, Monday through Saturday, 7 AM to 5 PM. Emergency service is available by appointment after 5 PM Monday through Saturday and on Sundays.
You can also send a request with your measurements and photos, or reach us through our contact page. To see more about the doors we work on, visit our commercial overhead garage doors page.
Please note: This article is general information for homeowners and business owners. It is not professional, legal or building code advice. Codes, permit rules and HOA requirements vary by city and county, so check with your local building department or HOA before you start work, and have a trained technician look at your specific door or gate. Never try to adjust or replace garage door springs or cables yourself.
