Fitting, replacement and upgrades · SL9

Battery backup and safety upgrades in Gerrards Cross

If the electric door on your garage in Gerrards Cross has no photocells, or a worn safety edge, an upgrade visit can put that right. We cover homes in Buckinghamshire, and any other parts the door needs are quoted before they're fitted.

Request a visit Call 0800 088 6248

Guide price: from £99 inc VAT
First step: Visit price agreed first
Covers: Gerrards Cross, SL9 and UB9
Area: Buckinghamshire

Roller door control box and battery backup unit mounted on a garage wall

Computer-generated image

What should I know about battery backup and safety upgrades in Gerrards Cross?

A battery backup unit lets the door run for a limited number of cycles when the mains power is off.
You're shown how to test the safety edge and photocells monthly, following the manufacturer's instructions for your door.
Photocells mounted either side of the opening stop the door closing while anything is breaking the beam.
After fitting, the door is tested to check it stops and reverses as it should with the new devices.

How does it work in Gerrards Cross?

Tell us about the electric roller door at your home in Gerrards Cross and the upgrade you're interested in. The make of the motor or control box helps us check compatibility.

STEP 01
Tell us about the door
Describe the door and what you need, with a photo or video if you can.
STEP 02
Agree the visit price
We confirm the visit price before anyone comes out.
STEP 03
Visit
The engineer finds the cause and makes the door safe where possible.
STEP 04
Parts quoted first
Any parts are quoted before they are fitted, so you decide.

How much do battery backup and safety upgrades cost in Gerrards Cross?

Item	Guide price (inc VAT)	Ex VAT
Battery backup unit, fitted to an existing electric door	£149–£279	£124.17–£232.50 + VAT
Safety edge replacement, fitted	£159–£295	£132.50–£245.83 + VAT
Photocell pair replacement, fitted	£99–£189	£82.50–£157.50 + VAT

Guide prices for homes, last reviewed 25 October 2026. Your written quote is the price. See the full price list.

Covering Gerrards Cross and nearby

We take enquiries from across Gerrards Cross, from SL9 outwards, and confirm every price and date in writing before anything is ordered. Gerrards Cross is about 19 miles from Aylesbury.

Nearby, we also take enquiries from Chalfont St Peter, Uxbridge and Rickmansworth.

Rules that apply in Gerrards Cross

Powered door safety

Every powered door we fit is commissioned with force testing to BS EN 12453 and handed over with a Declaration of Conformity and UKCA or CE marking, as the Supply of Machinery (Safety) Regulations 2008 require.

Electrics

An electric door needs a power supply near the roller box. Electrical work must meet BS 7671, and in England some domestic electrical work is notifiable under Part P, so it is done by a registered competent person or signed off by building control.

Battery backup and safety upgrades in Gerrards Cross: questions

Do you repair roller doors you did not fit in Gerrards Cross?

Yes. We repair roller garage doors of any make in Gerrards Cross and across SL9 and UB9, where parts are available. If a part is no longer made, we tell you what will fit instead, or price a replacement door if that is the better option.

What should I do while I wait for a visit in Gerrards Cross?

If the door is stuck part-open, keep people, pets and cars clear of it and switch off the power at the isolator if it is safe to reach. Do not force the curtain or open the roller box. Your Gerrards Cross visit date is confirmed in writing.

Can I get a price for Gerrards Cross without anyone visiting?

Yes. The guide price tool takes four steps and gives a range for your opening and door type. It is a guide, not a quote: the written quote comes after the survey or once the visit price is agreed.

Do you cover Gerrards Cross?

Yes. Gerrards Cross is part of the area we cover in Buckinghamshire, including SL9 and UB9. Get a guide price online, then we confirm a survey or visit date in writing. Dates depend on installer and engineer availability.

Can safety devices be added to an older electric door?

Usually, if a compatible safety edge or photocells are available for the control box. Some older systems need extra wiring or a replacement control box first. Tell us what's on the control box label and we'll confirm whether it can be done, and the price, before booking the visit.

Do I still need the manual override if I have a battery backup?

Yes. A battery unit covers a limited number of cycles, and it can run down during a long power cut or as the battery ages. Keep the override handle somewhere you can find it in the dark, and make sure everyone who uses the garage knows where it is and how it works.