The short answer
Converting a manual industrial door to electric means fitting a motor, controls and safety devices to an existing door, which turns it into a machine. The person doing the conversion usually becomes its legal manufacturer. A survey must first confirm the door is balanced, sound and suitable. Guide price: £1,195 to £3,195 ex VAT, confirmed after survey.
Key points
- Converting a manual door to electric creates a new machine with full manufacturer duties.
- The survey must confirm spring balance, barrel, curtain, guides, wind exposure and power.
- Safety devices depend on the control method; automatic operation needs the most protection.
- Guide price £1,195 to £3,195 per door, ex VAT, confirmed in writing after survey.
- Expect a Declaration of Conformity, user instructions and test records at handover.
Can any manual industrial door be converted to electric?
Many manual roller shutters and sectional doors can be converted to electric operation, but not all. The door must be structurally sound, correctly balanced, running freely in its guides or tracks, and suited to the forces and cycle count a motor will impose. A door that is hard to lift by hand will not be fixed by adding a motor; the motor will simply wear out quickly and the door may become unsafe.
Conversion is usually worthwhile when the door is in good condition and the opening is used often enough that manual operation wastes time, causes strain injuries or leads staff to leave the door open. If the door is old, damaged or obsolete, replacement with a factory-powered door may cost little more and come with complete documentation.
Why does the converter become the door's manufacturer?
Adding a motor to a manual door creates a new machine, so the person who does the conversion takes on the legal duties of its manufacturer. HSE's guidance on powered gates and doors says that where installers convert an existing manual gate to power, the converter in most cases becomes the product manufacturer.
In Great Britain that means the converter must meet the Supply of Machinery (Safety) Regulations 2008: assess the risks of the complete powered door, fit appropriate safety measures, compile a technical file, apply UKCA or CE marking, issue a Declaration of Conformity and provide user instructions. In Northern Ireland the equivalent EU machinery rules apply, with CE marking.
The motor's own Declaration of Incorporation does not cover the finished door. A conversion quote that does not mention a risk assessment, testing and a Declaration of Conformity is leaving out work the law requires.
What does a survey check before conversion?
A conversion survey checks whether the existing door can safely be powered and what it will need. On a roller shutter or sectional door our surveyors look at:
| Check | What we look for | Why it matters |
|---|---|---|
| Spring balance | Door stays put at mid-height and lifts with modest effort | An unbalanced door overloads the motor and gearbox |
| Barrel and end plates | Straight barrel, sound bearings, secure brackets | The motor drives through these; worn parts fail under power |
| Curtain or panels | No badly bent laths or panels, secure end locks | Damaged sections jam and can derail when driven |
| Guides and tracks | Straight, plumb, securely fixed, free of debris | Binding increases force at the closing edge |
| Wind exposure | Opening size, orientation and declared wind class | Wind load affects motor sizing and safety device behaviour |
| Side room and headroom | Space for a shaft, side or centre-mounted motor | Decides which drive can be fitted |
| Power supply | Single or three-phase supply near the opening | May need electrical work |
If the survey finds problems, they are repaired or adjusted first, or we recommend replacement instead. We also ask how the door will be used once powered, because a door that moves from a few manual lifts a day to dozens of powered cycles needs springs rated for that work.
What safety devices does a converted door need?
A converted door needs the same protection against trapping as any new powered door, chosen to suit how it will be controlled and who will be near it. In Great Britain regulation 18 of the Workplace Regulations requires powered doors to have suitable and effective features to prevent trapping; Northern Ireland's Workplace Regulations have an equivalent requirement.
- Hold-to-run controls, where the operator must keep pressing the button in sight of the door, need the least extra protection, but only suit low-risk situations.
- Impulse or automatic operation needs a safety edge on the closing edge, photocells or a light curtain, and controls that monitor these devices.
- Fall protection: vertically moving doors need protection against falling if the suspension fails, such as an anti-drop or spring-break device.
- Manual override: a way to open the door in a power cut, such as a hand chain or crank, where needed for safety.
- Emergency stop at the control station.
Our door safety upgrades page lists the devices we fit. Safety upgrades on their own are a guide £445 to £1,795 per door, ex VAT.
How much does a manual-to-electric conversion cost?
A manual-to-electric conversion is a guide £1,195 to £3,195 per door, ex VAT, supplied and installed, confirmed in writing after survey. The range reflects door size and weight, motor type, control method and the safety devices needed.
Things that move the price:
- a shaft-mounted motor is usually simpler than a centre-mounted or chain-driven operator;
- three-phase motors for heavy or busy doors need a suitable supply;
- automatic operation needs more safety equipment than hold-to-run;
- remote controls, radar, loops or interlocks add cost;
- repairs found on survey, such as springs or bent laths, are quoted separately.
If the repairs needed approach the cost of a new door, we will say so and price both options.
What happens on conversion day?
On the day, the engineer isolates and secures the door, makes any agreed repairs, fits the motor and controls, installs the safety devices and connects to the prepared supply. They then set the limits, adjust force and speed, and test every safety function.
Before handover the engineer should:
- run the door through full cycles and check it stops and reverses correctly;
- measure closing forces where force limitation is a protective measure;
- demonstrate the emergency stop and manual operation;
- apply the conformity marking and warning signs;
- hand over the Declaration of Conformity, user instructions and test records;
- show your staff how to use and check the door.
Most single-door conversions are completed in a day, subject to the survey findings.
How do you keep a converted door safe afterwards?
A converted door needs the same ongoing care as any powered door: regular servicing, simple user checks and prompt repair of faults. Adding a motor increases the number of cycles the door makes, often dramatically, so springs, cables and guides that lasted years under manual use may now wear much faster.
After conversion:
- put the door on a planned maintenance schedule, at least annually and more often if it is busy;
- make sure staff test the safety edge or photocells as described in the user instructions;
- keep the service record with the Declaration of Conformity and technical file reference;
- do not change the control method, for example from hold-to-run to automatic, without a fresh assessment;
- report any change in noise, speed or behaviour straight away.
If the motor later fails, a like-for-like motor replacement is a guide £845 to £2,395, ex VAT. Replacing it with a different type of operator may need the assessment and documentation updating, so mention the original conversion when you call.
Frequently asked questions
Can I just buy a motor kit and fit it myself?
You can buy kits, but whoever fits the motor becomes legally responsible for the complete powered door, including the risk assessment, safety devices, testing, technical file, marking and Declaration of Conformity. On an industrial door used at work, that is a significant responsibility. A competent installer with the right test equipment is the safer route.
Will converting my door void the original manufacturer's warranty?
It may, depending on the manufacturer's terms, especially if the motor or controls are not approved for that door. Check the warranty before conversion. Where possible we use operators the door manufacturer approves for that door type, and we record what was fitted in the technical file and handover pack.
Can a converted door be operated by remote control?
Yes, but remote or automatic operation means the operator may not be watching the door as it closes, so the door needs monitored safety edges and photocells or a light curtain to protect anyone in the opening. The risk assessment decides what is appropriate for the location and the people around it.
What if the power fails after conversion?
Where it is needed for safety, the door must be operable manually unless it opens automatically on power failure. Most converted doors keep a hand chain or crank for this. Staff should know where it is and how to use it, and it should be checked at every service visit.
Sources
- Powered gates and doors: legal responsibilities (HSE)
- Workplace (Health, Safety and Welfare) Regulations 1992, regulation 18 (legislation.gov.uk)
- Ensuring powered doors and gates are safe (HSE)
- Supply of Machinery (Safety) Regulations 2008: Great Britain (GOV.UK)
This guide is general information about UK rules and good practice, not legal advice. Check the official sources and your own risk assessment for your site.