Mon (to) Sun: 7:30am - 8:00pm
San Antonio
Mon (to) Sun: 7:30am - 8:00pm
San Antonio
When a commercial garage door stops working, everything behind it stops too. Vehicles can’t get in or out, employees lose access to the workspace, and every hour of downtime costs your business real money. That’s a very different situation from a residential door that won’t open on a Saturday morning.
Sentinel Garage Door provides commercial garage door repair across the San Antonio area. We bring the same hands-on, locally owned approach that built our reputation in residential service, along with the tools and experience to handle the heavier, higher-cycle overhead doors that commercial properties depend on. If your door looks like a bigger version of a residential garage door with panels, tracks, and a spring system overhead, we’re the right call.
The commercial doors we service operate on the same principle as residential garage doors. Sectional panels travel along tracks and stack overhead when open. Torsion springs provide the lifting force. Cables connect the springs to the door through cable drums. An operator (the commercial version of a garage door opener) powers the movement.
The difference is everything is larger, heavier, and works harder. Commercial overhead doors can weigh 500 to over 1,000 pounds. They cycle 20 to 80 times a day instead of 3 to 5. And they run on high-cycle torsion springs and heavy-duty hoist operators that residential doors simply don’t need.
Commercial overhead doors work on the same principle as the residential doors in your garage. The difference is scale.
(210) 864-9594
Commercial doors fail in predictable ways. The higher usage rate accelerates wear on every component, so the same problems that affect residential doors happen faster and hit harder in commercial settings.
Here are the issues we see most often on commercial overhead doors, along with what they usually mean:
Commercial repairs require a slightly different approach than residential work. Here’s what to expect when you call:
Tell us the door size, the problem, and how urgently you need it fixed. This helps us load the right parts before we head out.
We inspect the full system: panels, springs, cables, tracks, rollers, and operator. Commercial doors have more components under higher stress, so a thorough check matters.
You’ll know the cost, the scope, and the timeline before we pick up a tool. If multiple issues exist, we prioritize what needs to happen now versus what can wait.
We use parts rated for commercial weight loads and cycle counts. Putting residential-grade springs on a commercial door is a shortcut that leads to repeat failures. We don’t take that shortcut.
We cycle the door multiple times, test the operator, and verify all safety mechanisms. The door doesn’t leave our hands until everything runs smoothly.
Scheduling flexibility: We’re available on Sundays and holidays. If your business can’t afford downtime during operating hours, we can schedule repairs during off-hours. Just let us know when you call.
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If a cable snapped and your door isn’t working, follow these steps to stay safe while you wait for help:
1. Stop using the door immediately Don’t press the opener button or try to lift the door manually. Operating a door with a broken cable can cause it to tilt, jam, or fall without warning.
2. Pull the emergency release The red handle on the opener rail disconnects the door from the motor. Pull it toward the door so the opener can’t activate accidentally through a remote or smart app.
3. Secure the door if it’s partially open Clamp locking pliers on the track below the lowest roller to prevent the door from sliding. If the door is wide open, block the opening and lock your interior garage door.
4. Stay away from the bottom brackets The brackets where cables attach are under extreme spring tension. They are the most dangerous part of the entire system. Never attempt to detach or adjust them.
5. Call us and describe what you see Tell us if the door is tilted, if you see a hanging cable, or if you heard a loud bang. These details help us bring the right parts. We serve homeowners across Stone Oak, Shavano Park, Castle Hills, and surrounding San Antonio communities. Call (210) 864-9594.
Important: Cable repair is one of the most dangerous DIY garage door tasks. The bottom brackets connect directly to the spring system and store enough energy to cause serious injury. Even experienced homeowners should leave this to a professional. If you’re dealing with a cable emergency, visit our emergency garage door repair page or call us directly. The cost of a repair is always less than the cost of a trip to the ER.
We work with a range of commercial properties across the San Antonio area. Here are some of the businesses that rely on us to keep their doors running:
Auto repair shops and body shops with large overhead doors that need to operate smoothly for vehicles coming in and out all day.
Workshops and fabrication spaces where the door is an essential part of the daily workflow and downtime means lost production.
Commercial garages and parking structures with overhead doors that cycle dozens of times daily and need consistent, reliable operation.
Retail and storage properties with overhead doors that protect inventory and secure the space overnight.
Fire stations and municipal buildings where door reliability is directly tied to public safety and response times.
We service commercial sectional overhead doors, which are the same type of panel-and-track system used in residential garages but built with heavier materials and higher-rated components. These are the doors you see on auto shops, commercial garages, workshops, and similar properties.
We prioritize commercial calls because a stuck door can halt your operations. Same-day service is available in most cases. Because we're based locally, businesses in Stone Oak, Shavano Park, Hollywood Park, Castle Hills, Leon Valley, and Timberwood Park are within a short drive.
Yes. We're available on Sundays and holidays, and we understand that some businesses need repairs done during off-hours to avoid disrupting daily operations. Let us know your scheduling needs when you call.
Absolutely. Residential garage door repair is where we built our reputation. Visit our main garage door repair page for a full overview, including spring repair, opener repair, and new door installation.
Yes. We offer scheduled maintenance visits tailored to your door's usage level. High-traffic doors benefit from quarterly inspections, while lower-use doors may only need annual checkups. Call us to discuss a plan that fits your operation.
That depends on the problem and which parts are needed. Commercial repairs tend to cost more than residential because the hardware is heavier and more specialized. However, we always provide a clear quote before starting any work, so there are no surprises.