The rule is simple: make it electric when you cannot reach it, and leave it manual when you can. A rooflight within comfortable reach, up to about a 2.4 metre ceiling or where a pole works, opens perfectly well by hand and costs materially less. Anything higher, above a stairwell, or on a sloping ceiling where the vent sits at the ridge is out of reach, and a manual unit you cannot reach is a fixed unit you paid extra for. Electric also brings a rain sensor, which a manual unit cannot have, so where rain protection matters the balance tips further. This page compares the two on reach, cost, maintenance, failure modes and ventilation control.
The comparison, point by point
| Aspect | Manual | Electric |
|---|---|---|
| Reach | Fine within about 2.4m or with a pole | Any height, no pole |
| Cost | Lower, no actuator or wiring | Higher, add £700 to £1,500 plus wiring |
| Rain protection | None, you close it yourself | Rain sensor closes it automatically |
| Ventilation control | Manual, whatever you set | Switch, schedule, app, group control |
| Maintenance | Handle and hinges only | Actuator, sensor and controls to keep clean |
| Failure modes | Few, mechanical only | Motor, receiver, sensor can fail |
| Power cut | Unaffected | Mains unit fails closed; solar unaffected |
| Best suited to | Bedrooms, reachable units | High units, stairwells, kitchens |
Reach and height
This is the deciding factor most of the time. A top-hung roof window at chest height on a loft slope opens by hand with no effort. A pole-operated unit works up to a point, but poles are awkward, they get put away, and the vent that needs a pole is the vent that stays shut. Once the unit is genuinely out of reach, at the ridge of a sloping ceiling, over a double-height space, or above a stairwell, manual operation stops being realistic and electric is the only way the unit gets used.
The thresholds we use at survey are set out on the when to choose electric answer, but the short version is height, position and weight: high, far, or heavy means electric.
Cost
Manual is cheaper, plainly. There is no actuator, no controls and no wiring, so a manual roof window is the base cost of the unit and the fit. Electric adds the mechanism and controls, usually 700 to 1,500 pounds, and the electrical connection on top, which the electric rooflight installation cost page breaks down. If you are fitting several rooflights, you rarely need them all to open, so the sensible spend is to make the one that matters electric and leave the reachable ones manual.
Which one should be the electric one? Make the highest unit electric, because hot air collects at the top of the room and a vent there shifts the most heat. Make the unreachable one electric, because a manual unit you cannot reach is wasted. Make the kitchen one electric, because a switch by the door gets used where a pole does not. Leave bedroom units within reach manual, because they open fine by hand and cost less.
Rain protection
This is the one thing a manual unit simply cannot do. An electric unit with a rain sensor closes itself when the weather turns, whether or not anyone is home. In Suffolk, where a squall can come in off the North Sea in the time it takes to make a cup of tea, that is the feature people value most once they have lived with it. A manual unit left open when a shower arrives lets water in until someone gets to it. The rain sensor has caveats worth knowing, and they are on the rain sensor installation answer, but the core benefit is real: the unit protects the room when you are not thinking about it.
Maintenance and failure modes
Manual wins here, because there is less to go wrong. A manual rooflight has a handle, hinges and seals, and that is it. An electric unit adds an actuator, a rain sensor and control electronics, each of which can fail. That is not a reason to avoid electric, it is a reason to buy a supported, current system and keep the sensor clean, but it is an honest difference.
When an electric unit does fail, the parts matter. A seized actuator strains the frame and seals, which is why we replace rather than repair, and the reasoning is on the failed opening mechanism page. Obsolete controls can strand an otherwise sound unit, covered on the obsolete controls page. A manual unit rarely reaches that point, because there is nothing electronic to date.
Power-cut behaviour
A manual unit is unaffected by a power cut, obviously. A mains electric unit fails closed, so whatever position it is in when the power goes, it stays, and it cannot be driven until power returns. If it was open, it stays open, which is worth planning for on a unit you cannot reach. A solar unit sidesteps this entirely because it carries its own battery. The full picture is on the electric rooflight in a power cut answer.
Lifespan and what actually wears
Over twenty years, the two age differently. A manual roof window’s wearing parts are the hinges, the handle mechanism and the gasket. Keep the gasket clean and the unit opens and closes for decades with almost nothing to go wrong. An electric unit has the same frame and seals plus an actuator, a rain sensor and control electronics, and those follow the electronics market rather than the roofing one. The actuator itself usually outlasts the controls. What dates first is the radio system, as covered on the obsolete controls page, which is worth factoring in if you expect to be in the house a long time.
None of that is a reason to avoid electric where you need it. It is a reason to buy a current, supported system, keep the sensor clean, and accept that the convenience comes with a little more to maintain. On a coastal roof the maintenance matters more, because salt attacks the sensor and the actuator bracket, and a manual unit simply has less exposed to the weather.
A worked example: a three-rooflight kitchen extension
Take a common Ipswich job, a side-return kitchen with a sloping ceiling and three rooflights: one high at the ridge over the hob, one lower over the dining end within pole reach, and one small unit over a utility corner at chest height.
The sensible specification is not three electric units. It is one electric unit at the ridge over the hob, because that is out of reach, it is where cooking moisture rises, and it ventilates best at the high point. The dining-end unit within pole reach can be manual if the household will use the pole, or electric if experience says the pole will live in a cupboard. The utility unit at chest height stays manual, because it opens by hand in a second and costs materially less. That puts the electric premium on the one rooflight that earns it and saves it on the two that do not, which is where the money is best spent. The cost breakdown behind that is on the electric rooflight installation cost page.
The rule, applied
- Ceiling under about 2.4 metres, unit within reach or a pole works: manual, unless you specifically want rain protection.
- High or sloping ceiling, unit at the ridge: electric, because you will not reach it.
- Above a stairwell: electric, and if it is also a fire escape route it may need to be an AOV, covered on the AOV installation page.
- Large, heavy sash: electric, because it is hard to work by hand even within reach.
- Rain protection matters, hard floor or valuables below: electric, for the sensor.
If the unit lands on the electric side and it is a retrofit into a finished room, weigh solar against mains, because solar removes the cable route problem. The main electric skylight installation page covers the whole decision.
Changing your mind later
People sometimes ask whether they can start manual and motorise later if they find they cannot reach the unit or want the rain protection. The honest answer is that it depends on the unit. Some manual roof window ranges accept a solar conversion kit that adds an actuator, panel, battery, rain sensor and handset without touching the roof covering, which is a genuine upgrade path on a compatible unit. Others do not, and retrofitting a motor to a tired or incompatible frame rarely pays, because you spend on a mechanism surrounded by hardened seals and dated weathering. So if there is any real chance you will want it to open, and you cannot easily reach it, it is usually cheaper to fit electric from the start than to convert later. The full reasoning is on the retrofit a motor versus replace answer.
The one place this works cleanly in your favour is solar. Because a solar unit needs no wiring, converting a compatible manual unit to solar later is a half-day job with no electrician and no roof disruption, which keeps the option open without committing to the cost now.
Common questions
Is an electric rooflight worth the extra over manual?
It is worth it when you cannot comfortably reach the unit, when rain protection matters, or when the sash is large and heavy. It is not worth it on a bedroom roof window at chest height that opens fine by hand. If you are fitting several rooflights, make the highest, the unreachable and the kitchen unit electric and leave the reachable ones manual, which is where the money is best spent.
Can a manual rooflight have a rain sensor?
No. A rain sensor closes the unit by driving the actuator, so it only works on a motorised rooflight. A manual unit relies on someone being there to close it. If automatic rain closing is the reason you are considering an upgrade, that alone can justify going electric, especially over a hard floor or valuables where an open unit in a shower is a real nuisance.
Do electric rooflights go wrong more than manual ones?
They have more parts that can fail, an actuator, a sensor and control electronics, where a manual unit has only a handle, hinges and seals. That is a genuine difference, but it is managed by fitting a current, supported system and keeping the sensor clean. When an electric unit does fail out of warranty and out of support, we replace it rather than repair, because a seized actuator strains the frame and the controls are often obsolete too.
Get a fixed price, electric or manual
Tell us the room, the ceiling height and where the rooflight sits, and if there are several, which matter most. We survey it and advise which units should open, which should be electric and which can stay manual, then give you one written price fixed after survey with a 10-year workmanship guarantee.
Request a fixed quote for electric or manual rooflight installation across Ipswich, Suffolk and north Essex.
Thinking about this job? We survey across Ipswich, Suffolk and north Essex and give you a fixed price before any work starts, with a 10-year workmanship guarantee.