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By mid November the light has gone before most people are home, and plenty of houses sit empty all day, then for days at a time over Christmas. The garage is often where the bikes, the tools and the second freezer live, so it is a fair question: how secure is a roller garage door, and what can you add to make it harder to get into? This guide covers how the door itself resists being forced, the small accessories that help, smart control, and a checklist for the dark evenings.
How a roller garage door resists being forced
An electric roller door does the locking for you. Motor driven locking makes a garage door far tougher to force open than a manual door that relies on a handle and a latch. Automatic doors also use built in locking mechanisms and anti-lift devices, which is the part that matters most, because lifting the curtain from the bottom is the obvious way to try to get in.
The curtain helps too. Our insulated aluminium slats are double skinned with a rigid core, which resists flexing and supports reliable locking. Of our three ranges, Classic 77 has the thickest profile, 18mm, and gives the most solid feel when the door is closed, which is one reason it is chosen for wide and double openings.
On most garages the weaker points are elsewhere: a side door with a basic lock, a window, a remote left on the passenger seat, or a roller door that stopped a few inches short of the floor. The rest of this guide is about closing those gaps.
What an Autolock adds
An Autolock is a small automatic locking device that secures the door the moment it closes, so the door is locked even if nobody thinks about it, and it helps the curtain resist forced lifting. Our shop sells two, the TWF55 Autolock and the TWF77 Autolock, at £9.50 each. They are built for heavy daily use and simple to fit. If you are not sure which one suits your door, call us on 01603 737183 before ordering.
If you are ordering a new door, you can add an Autolock from the shop to the same basket and pay for everything in one checkout.
Remotes, key switches and rolling codes
Every TWF roller door comes with key switch controls as standard. Add a safety edge kit and you get remote controls too, and with them the question of who holds a fob. Teleco systems use rolling codes, which protect against cloning: the code changes every time the button is pressed, so a recorded signal is no use to anyone.
Whatever system you have, treat each fob as a house key. Know how many exist, keep a spare indoors rather than in the car, and if one goes missing, clear it from the receiver's memory rather than hoping it turns up. Clearing the memory usually means pairing every remaining remote again, which takes a few minutes. Our guide to garage door remotes and fobs explains which replacement fits which control panel, and our fob programming guide covers the pairing steps for Teleco, Eurokit and Genesis systems.
Smart control: knowing the door is shut
Most of us have driven off and then wondered whether the garage was closed. A smart controller answers that from your phone. The Remootio 3 smart garage door controller, £110 in our shop, connects to the wall button terminals of your existing opener and adds app and voice control over Bluetooth and Wi-Fi. A magnetic sensor shows whether the door is open or closed and sends alerts to your phone, and an activity history shows when the door was used.
For security, it uses 256-bit end to end encryption with the keys stored on the device and on your phone, it keeps working locally if the internet is down, and there is no subscription. You can share digital keys with family or a trusted neighbour and revoke them at any time, which is handy while you are away. Remootio 3 works with the Eurokit 3 control panel. Our post on retrofitting phone control to your garage door opener explains how it is fitted.
The external manual override and power cuts
If the roller door is the only way into your garage, you need a way to open it from outside when the power is off. The external manual override does that, and it can be added as an extra when you order a new door. If your garage has a side door or an internal door from the house, you can open the roller door from inside with the winding handle instead, as our guide to opening a roller garage door in a power cut shows. It is worth knowing which applies to you before a winter power cut.
The dark evening checklist
- Watch the door reach the floor. The safety edge stops and reverses the door if something is in the way, which is right, but a bin or a bike can leave it a few inches open. Wait until it is fully down before you drive off.
- Keep fobs out of sight. Not on the dashboard, not hanging by the back door, and not left in an unlocked car on the drive.
- Lock the door between the garage and the house. If someone does get into the garage, that door is the next thing between them and your home.
- Light the drive and the door. A security light, or the courtesy light on your control box if it has one, helps you see and be seen when you get home in the dark.
- Count your remotes. If one is missing, clear the receiver memory and pair the rest again.
- Secure what is inside. For bikes, motorbikes or valuable tools, a ground anchor or an alarm sensor in the garage adds another layer.
- Test before you go away. Before Christmas, run the door up and down, check the safety edge and the override, and keep our number, 01603 737183, somewhere you can find it.
Our winter preparation checklist covers the maintenance side of the same jobs: seals, guides, batteries and the override.
Security and your home insurance
Many insurers treat a garage door as an external door, and external doors often come with security requirements in the policy wording. If your policy names a locking standard, check your garage door meets it, because a claim can turn on it. Our post on whether garage doors are covered by home insurance goes through what insurers typically expect.
When the door itself is the problem
A door that will not close fully, bounces back when it reaches the floor, or has damaged slats is a security problem as well as a nuisance. Our post on a roller garage door that is not closing goes through the usual causes. If the door is tired beyond a simple fix, a new made to measure roller door is priced in minutes in the Garage Door Builder, and in Norfolk and Suffolk our engineers can repair your garage door or replace it.
FAQs
Is an electric roller garage door harder to force open than a manual door?
Yes. Motor driven locking makes an electric garage door far tougher to force open than a manual door that relies on a handle and a latch. Automatic doors also use built in locking mechanisms and anti-lift devices, which resist the curtain being lifted from the bottom.
What does an Autolock do on a roller garage door?
An Autolock is a small automatic locking device that secures the door the moment it closes, so it is locked even if nobody remembers to lock it, and it helps the curtain resist forced lifting. Our shop sells the TWF55 Autolock and the TWF77 Autolock at £9.50 each.
Can someone copy the signal from my roller garage door remote?
Teleco systems use rolling codes, which protect against cloning because the code changes every time the button is pressed. Whatever system you have, treat each fob like a house key: know how many exist and keep them out of sight.
What should I do if I lose a remote fob for my garage door?
Clear the missing fob from the receiver memory so it no longer works, then pair your remaining remotes again. The exact steps depend on your control panel, so follow the instructions supplied with it, or call us on 01603 737183 if you are unsure.
Can I check from my phone whether my garage door is shut?
Yes, with a smart controller. The Remootio 3, £110 in our shop, connects to the wall button terminals of your opener, shows whether the door is open or closed, and sends alerts to your phone. It works with the Eurokit 3 control panel and needs no subscription.
Do I need an external manual override for my roller garage door?
You do if the roller door is the only way into your garage, because it lets you open the door from outside during a power cut. If you have a side door or an internal door from the house, you can open the roller door from inside with the winding handle instead.
Key takeaways
- An electric roller door locks itself when it closes, and motor driven locking makes it far tougher to force than a manual door.
- An Autolock secures the door the moment it shuts and helps resist forced lifting.
- Treat every fob as a key: know how many exist, and clear a missing one from the receiver.
- A smart controller tells you on your phone whether the door is open or shut.
- On dark evenings, watch the door reach the floor, keep fobs out of sight, and light the drive.
Conclusion
A modern electric roller door is a strong starting point, and the gaps that remain are mostly small: an Autolock, a sensible approach to remotes, a light on the drive, and the habit of watching the door close. Add an Autolock from our shop, check your fobs, and if your current door is past its best, price a new one in the builder.
Written by the TWF team, who have manufactured and fitted roller garage doors from Norfolk for over 25 years. Last updated: 13 November 2026.
