Glossary term
through-floor lift
A domestic lift that travels through an opening cut in the bedroom floor, closing the hole with a powered ceiling flap when it leaves.
What it means
A through-floor lift links a downstairs room directly to the room above, travelling through a hole cut in the floor. When the car goes down, a powered flap or the car roof itself closes the opening so the upstairs room is safe to walk in. It does not need a shaft, which is why it is the usual choice when a house cannot take a conventional lift structure.
Where you see it
Typically a lounge to a bedroom in an ordinary house, installed to keep someone living at home. The upstairs landing area around the opening is part of the installation, so furniture placement upstairs and downstairs matters more than people expect.
How it works
A motor and drive at the top of the mast raise and lower the carriage on a single column or a pair of guides. The ceiling flap is interlocked with the travel: the lift will not move if the flap cannot close, and the flap will not open unless the car is arriving. Battery backup is normal so the car can be lowered if the power fails.
Sensors around the ceiling opening and under the platform look for obstructions. A rug that has crept over the edge upstairs, or a box left near the opening, is enough to stop the flap and therefore stop the lift.
Why it matters
These lifts live in the middle of a household, so their faults are usually about the space around them rather than the machine. Keeping a clear metre around the opening upstairs and around the car downstairs removes most of the everyday stoppages.
Commonly confused with
A through-floor lift is confused with a home lift in a shaft. This type travels through an opening cut in the floor above, and a powered flap or ceiling closure seals the hole when the car is downstairs. That closure is part of the safety system, not a piece of trim.
Wear, service and lifespan
The floor closure, the drive, the obstruction sensors under the car and the emergency lowering are the items that matter. Service work tests the closure, the underside sensors and the manual lowering, and confirms the household knows how to use it. Furniture creeping into the landing area is the most common cause of trips.
Signs to watch for
- The lift travels part-way and returns.
- The ceiling flap will not close, so nothing else works.
- The lift beeps at the parked position.
- Travel is slower and the motor sounds strained.
- The upstairs opening no longer closes flush.
Troubleshooting through-floor lift
The lift stops before reaching the upstairs floor
What it usually means: The ceiling flap has not opened fully, or a sensor sees an obstruction
Safe check: Look at the upstairs opening for anything placed near it and report what you see.
It stops on the way down and reverses slightly
What it usually means: An underside obstruction sensor has triggered
Safe check: Clear the floor area beneath the car and keep it permanently clear.
The car is stuck between floors with someone inside
What it usually means: An entrapment
Safe check: Call the emergency number, stay with the person and follow the provider's instructions only.
How to report it
Say which direction it fails in, whether the ceiling closure moved, and whether the floor areas at both levels are clear. Never place furniture, laundry baskets or storage in the lift's path, upstairs or downstairs.
Ask us about through-floor lift on your lift
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Related terms
Definitions that usually come up alongside through-floor lift when you are describing a fault.
- home lift
A small passenger lift installed in a private dwelling, usually serving two floors and built to the machinery rules rather than the commercial lift rules.
Lift types
- obstruction sensor
Any sensor that stops travel when something is in the way — under a stairlift footplate, beneath a platform, or across a doorway.
Safety devices
- lift
A powered machine that carries people or goods between fixed levels of a building, guided by rails and controlled from landings and from inside the car.
Lift types
- stairlift
A powered chair or standing platform that travels along a rail fixed to a staircase, letting one person ride between floors while seated.
Lift types
- platform lift
A slow-travelling lift with an open or enclosed platform, used mainly to move a wheelchair user over a short rise.
Lift types