Can I hang something from a plasterboard ceiling?

The same anchor that behaves reasonably in a wall behaves much worse in a ceiling, because the direction of the load has changed. On a wall much of the load is shear, sliding down the face. On a ceiling it is entirely tension, pulling the fixing straight out of the board, which is the weakest thing plasterboard does — and it does it continuously, day and night, for years.

Safety

What you'll need

• A joist detector, or a fine bradawl for probing
• A cable and pipe detector
• Long wood screws or purpose-made ceiling fixings
• Access to the void above, if there is any (optional)
• Eye protection — you are working overhead

Step by step

1. Decide honestly what the load is.A pendant light or a smoke alarm is light and static. A hanging chair, a punchbag, a pull-up bar, a heavy chandelier, a bike hoist, a laundry airer full of wet washing — these are not, and several of them are dynamic loads as well.
2. Find the joists.A detector, or probe carefully with a fine bradawl to find the resistance change. Ceiling joists usually run at 400 or 600mm centres, and the line of nail or screw heads in the board — which sometimes shows in raking light — gives them away.
3. Check what is above before drilling.Cables run through joists in the void, and in an upstairs ceiling the void may carry pipework as well. If there is a loft or an accessible void, look before you drill.
4. Fix into a joist for anything except the lightest items.A long wood screw well into the joist is the answer. Pilot it, and get real penetration into the timber rather than just past the board.
5. Span two joists for anything heavy or dynamic.A timber bearer screwed across two or more joists, with the item hung from that. This is how a punchbag, a swing, a bike hoist or a heavy light fitting should be supported, and it also lets you put the load where you want it rather than where a joist happens to be.
6. Use cavity fixings in the ceiling only for very light items.Gravity toggles and spring toggles are the appropriate types where board-only is acceptable at all. Derate the packet figure heavily and accept that sustained tension on gypsum is a creep problem, not just a strength one.
7. Treat lath and plaster and concrete ceilings as different problems entirely.Both have their own methods, and neither responds to plasterboard fixings.
8. Never hang anything over a bed, a cot or a seat on a board-only fixing.This is the line worth being absolute about. If it would hurt someone, it goes into timber.

Tips

• A ceiling rose is fixed to a joist or a batten, and it is the one existing fixing point you can usually trust — but it is an electrical fitting and it is not a hanging point for anything else.
• If there is a loft above, a bearer laid across the joists from the loft side is easy and gives a far better fixing than anything you can do from below.
• Sustained tension is the enemy. A load that swings, is pulled on or gets knocked — an airer, a hanging plant, a chair — should be treated as considerably heavier than it weighs.

Common mistakes

• Using an ordinary plasterboard plug in a ceiling — It relies on friction and a small area of gypsum in pure tension, which is exactly the loading plasterboard is worst at. It will pull through, often not immediately.
• Assuming that because it held when installed, it will keep holding — Gypsum creeps under sustained load. A ceiling fixing that felt solid can let go months later with nothing having changed.

Questions people ask