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Search for roller garage doors and you will still find manual versions on offer: a sprung barrel, a curtain you lift by hand and a bolt or two to lock it. They were the standard for decades. Today almost every roller door we build is electric, and the question we are asked most is whether the motor is worth having. This comparison sets out how each type works, where each one wins, and what happens on the day the power goes off.
We build electric garage doors as standard, so we will say plainly where that colours our view. We also repair and service enough older doors across Norfolk and Suffolk to know what a manual roller door is like to live with.
The short answer
For a garage attached to a house, used for a car or as a workshop, an electric roller door is the better buy. It opens from the car, it seals consistently every time because the motor closes it with the same force, and it is harder to force. A manual roller door still makes sense for an outbuilding with no power, a very small opening or a door that is opened a handful of times a year. For everything in between, the motor pays for itself in daily use.
How a manual roller garage door works
A manual roller door has a spring inside the barrel that balances the weight of the curtain, so that a person can lift it with a handle or a pole and it stays where it is left. It locks with shoot bolts into the guides, or with a lock on the bottom rail. There is no wiring, no remote and nothing to programme, which is its appeal.
The limits come from physics. The spring has to be matched to the curtain weight, it loses tension with age, and the wider and heavier the curtain, the more effort each lift takes. Manual doors are usually single-skin aluminium or steel for that reason, which is also why they are poor at insulation. On a cold morning you are lifting a cold, stiff curtain from a crouch, and on a wet one you are standing in the rain to do it.
How an electric roller garage door works
An electric roller door replaces the spring with a tubular motor that sits inside the barrel and turns it directly. You operate it from a wall mounted key switch, a remote fob or a phone app, and a safety edge on the bottom rail stops and reverses the curtain if it meets an obstruction. Because the motor is geared, it holds the curtain wherever it stops, including fully closed.
On a TWF door the motor and key switch are standard. Upgrade to remote operation in the Garage Door Builder and the kit also includes a receiver box with control buttons, two remotes and a safety edge system in hard wired or wireless form. Our guide to DIY electric roller garage doors covers the kit, the motor and the wiring choices in more depth.
Manual vs electric, side by side
| What you are comparing | Manual roller door | Electric roller door |
|---|---|---|
| Opening the door | Lift by hand, every time, in all weathers | Key switch, remote or phone, from the car |
| Closing and sealing | Depends on how firmly you pull it down | Same force every time, so the bottom seal sits properly |
| Security | Bolts or a lock you must remember to use | Held by the motor; Autolock engages on every close |
| Power cut | Unaffected | Manual override inside, external override available |
| Insulated curtain | Rare, because the extra weight makes lifting hard | Standard on all TWF doors |
| Double garage | Not practical by hand | Classic 77 up to 4950mm wide |
| Wiring | None | Plug-in or hard wired |
What happens in a power cut
This is the worry that keeps manual doors in the conversation, and it is the easiest one to answer. Every TWF electric roller door includes a manual override, so the curtain can be wound open or closed from inside the garage with a handle when the power is off. If the garage has a side door, that is all you need. If the roller door is the only way in, add the external manual override, which lets you release and wind the door from outside with a key. Our guide on opening a roller garage door in a power cut walks through both, step by step.
It is worth rehearsing the override once when the door is new, so the first time you use it is not on a dark evening with the shopping in the car.
Security: bolts versus a motor
A manual roller door is only as secure as the bolts you remembered to shoot across. An electric roller door is held closed by the motor and its gearbox, which is why it cannot simply be lifted from the outside, and an Autolock adds a mechanical lock that engages automatically each time the curtain closes. The TWF55 Autolock fits the 55mm doors and the TWF77 Autolock fits the Classic 77. Neither relies on anyone remembering anything, which is the point.
Insulation, weight and door size
Here the comparison stops being a matter of preference. A modern roller curtain is made from twin walled aluminium slats with a foam core, and the insulated construction is what keeps an attached garage from pulling heat out of the rooms around it. That curtain is heavier than a single-skin one, and a double-width version is heavier again. Lifting an insulated single by hand is hard work; lifting an insulated double is not realistic, which is why the Classic 77 for openings up to 4950mm wide is electric as standard and sized with a motor to match. If you need insulation, or you have anything wider than a single garage, the decision has been made for you.
Cost: what you are paying for
TWF electric roller door kits start from £505 inc VAT for a Standard 55 single door in white with key switch controls, with the exact price shown in the builder once you enter your measurements. We do not sell manual doors, so we will not invent a manual price to compare it with. What you would save by going manual is the motor, the controls and the safety edge, which is the part of the door you touch every day, and you would give up the insulated curtain that the motor makes practical. Running cost is small either way: a tubular motor only draws power while the curtain is moving, which is a few seconds at a time.
When a manual roller door still makes sense
- An outbuilding, stable or field shelter with no electricity supply and no prospect of one.
- A very small opening, such as a store or bin cupboard, where the curtain is light enough to lift with one hand.
- A door opened a few times a year, where the convenience of a remote is not worth anything to you.
If your garage fits one of those, a manual door from a maker who still offers them is a reasonable choice. If it does not, you are buying an electric door, and the questions become which slat size, which controls and whether to fit it yourself.
Converting a manual roller door to electric
If you already have a manual roller door in good condition, it can sometimes be motorised by fitting a tubular motor inside the barrel and adding a control panel. Whether that is sensible depends on the barrel diameter, the weight of the curtain and the state of the guides. On an older single-skin door the honest advice is usually a new made-to-measure insulated door, because you would be paying to motorise a curtain that was never designed to seal or insulate. If you are in Norfolk or Suffolk, our repair team can look at the existing door and tell you which way to go. Anywhere else, price the replacement in the builder and compare.
FAQs
Are manual roller garage doors still available in the UK?
Yes, some manufacturers still make spring-assisted manual roller doors, mostly for small openings and outbuildings. TWF builds electric roller doors as standard, with a manual override included on every door, so you get powered operation day to day and hand operation when you need it.
Can I open an electric roller garage door without power?
Yes. Every TWF door includes a manual override that lets you open or close the curtain from inside the garage with a winding handle. If the garage has no other door, an external manual override lets you do the same from outside with a key.
Are electric roller garage doors more secure than manual ones?
A closed electric roller door is held by its motor and gearbox, so it cannot simply be lifted from outside, and an Autolock adds a mechanical lock that engages every time the curtain closes. A manual door relies on the bolts or locks you remember to fasten.
How much more does an electric roller garage door cost?
TWF electric roller door kits start from £505 inc VAT for a Standard 55 single door in white with key switch controls, and the Garage Door Builder shows the exact price for your size. We do not sell manual doors, so we cannot give a like-for-like manual price; what you would save is the motor and controls, which is the part of the door you use every day.
Can a manual roller garage door be converted to electric?
Sometimes, by fitting a tubular motor inside the existing barrel and adding a control panel, but it depends on the barrel size, the curtain weight and the condition of the door. On older or non-insulated doors a new made-to-measure electric door is often the better value, and our repair team can advise if you are in Norfolk or Suffolk.
Does an electric roller garage door need special wiring?
Most self-fit kits are designed to plug into a standard socket inside the garage, as our guide to DIY electric roller garage doors explains. Hard wiring is an option where you want a tidier installation, and any fixed wiring should be done by a competent electrician.
Key takeaways
- Electric wins for any garage used regularly: convenience, consistent sealing and a curtain the motor holds shut.
- Power cuts are covered by the manual override on every TWF door, plus an external override for garages with no other entrance.
- Insulated curtains and double openings are too heavy for comfortable hand operation, so they are electric by default.
- Manual still suits unpowered outbuildings, very small openings and doors used a few times a year.
Conclusion
The manual roller door had a long run, and for a shed with no power it still does the job. For a home garage, the motor is not a luxury: it is what makes an insulated, secure, properly sealed roller door usable every day, and the override means you are never stuck. Explore the three ranges on our roller door options page, then put your measurements into the builder for a price.
Written by the TWF team, who have manufactured and fitted roller garage doors from Norfolk for over 25 years. Last updated: 16 October 2026.
