Ceiling repair guide
Downlight hole too big: what can I do?
If a new spotlight is smaller than the existing ceiling cutout, measure both before choosing a wider fitting, a matched converter or a proper plasterboard repair.
Check before you repair
Choose the remedy from the existing cutout and the new light.
- 01
Make the lighting position safe
Isolate the circuit and have the existing fitting, cable and ceiling position checked before cutting, patching or trying a different light.
- 02
Measure the hole, cutout and bezel
Record the existing ceiling-hole diameter, the new downlight's specified cutout and the outside diameter of its visible bezel. These are three different measurements.
- 03
Check for a compatible wider-bezel fitting
A retrofit downlight designed for a larger cutout may be the cleanest answer. Confirm the permitted hole range, ceiling thickness, clearances and any fire-rating requirements with the manufacturer.
- 04
Use only a matched converter or reducer
A converter plate can support a smaller fitting in a larger opening, but it must suit both the existing hole and the chosen downlight. A generic ring should not be assumed to maintain the fitting's approvals.
- 05
Repair the ceiling when the opening is unsuitable
Where no compatible fitting or converter is available, the sound solution is normally to repair the plasterboard, finish the patch and cut a new opening to the manufacturer's stated size.
- 06
Plan the opening before a future skim
During refurbishment, a spotlight bead can keep the cable position visible and provide a controlled circular edge while the ceiling is plastered, ready to reopen to the required diameter after curing.
See the prevention method
