Waterproofing · Singapore
Ceiling Leak Repair in Singapore
A ceiling leak is stressful, especially when it involves a neighbour. Here's how to find the cause, who's responsible, and how it gets fixed.
Most ceiling leaks in Singapore homes come from the bathroom of the unit above, where the waterproofing layer under the tiles has worn out. Others come from roofs, external walls, windows or aircon pipes. The fix depends on the source, so the first step is always to trace where the water is actually coming from.
Last updated November 2026
Common causes of ceiling leaks
| Source | Typical sign |
|---|---|
| Bathroom of the unit above | Stain directly under the upstairs toilet, worse after showers |
| Roof (top floor or landed) | Appears or worsens during and after heavy rain |
| Concealed water pipe | Damp all the time, even without rain or showers |
| External wall or window frame | Near windows or outer walls, after rain |
| Aircon pipe or trunking | Near aircon units, while the aircon is running |
HDB ceiling leaks: who is responsible?
This is the question most HDB owners ask first. In general, based on HDB's guidance:
- Leaks between two flats: usually caused by wear and tear of the waterproofing membrane and screed under the upper flat's floor. The upper and lower flat owners are jointly responsible for the repair.
- If the upper flat's renovation caused the leak: the upper flat owner is responsible for the repair.
- Top-floor flats leaking from the roof: the roof is common property, so contact your Town Council.
- Leaks through window frames or aircon fittings: usually the flat owner's responsibility.
HDB also runs a Goodwill Repair Assistance scheme for some ceiling leaks. Check HDB's website or contact your HDB branch for the current terms and whether your case qualifies.
This is general information based on HDB's published guidance, not legal advice. Rules can change, so check with HDB for your specific situation.
Condo ceiling leaks
In condos, leaks between units are usually handled between the two owners, while leaks from common property (such as the roof or common pipes) are the MCST's responsibility. Inform your management office early. They can help coordinate access to the unit above.
How we fix a ceiling leak
- Trace the source: inspect the ceiling, check the unit above or the roof, and test the likely entry points (for bathrooms, a water test on the floor)
- Fix the source: nano waterproofing, PU injection or full bathroom re-waterproofing for bathroom leaks; roof waterproofing for roof leaks
- Let the ceiling dry: concrete takes time to dry out after the source is fixed
- Repair the ceiling: treat any spalling concrete, then re-plaster and repaint
What to do right now
- Take clear photos of the stain and note when it gets worse
- Protect furniture and switch off lights or fans near the leak if water is near electrical fittings
- Talk to your neighbour above. Most are cooperative once they understand the situation
- WhatsApp us the photos for advice on next steps
How we work
- InspectWe find where the water is actually coming from: tiles, grout, floor trap, pipes, walls or roof.
- QuoteYou get a clear written quote with the method and timeline before any work starts.
- RepairWe fix the source with the right system: nano sealant, PU injection, membrane or roof coating.
- TestWhere the method allows, we water-test before handover so you can see it holds.
Frequently asked questions
How do I know if the leak is from the unit above?
If the stain is under the upstairs bathroom and gets worse after it's used, that's the most likely source. A water test on the upper floor confirms it.
Who pays for an HDB ceiling leak?
Usually both flat owners share the cost, unless the upper flat's renovation caused the leak. Roof leaks on top floors go to the Town Council. Check HDB's guidance for your case.
Can a ceiling leak be fixed without hacking the upstairs bathroom?
Often, yes, with nano waterproofing or PU injection if the problem is minor seepage. If the membrane has failed, re-waterproofing is needed.
Is a ceiling leak dangerous?
Water near lights and electrical points is a safety risk; switch them off. Long-term leaks can also cause concrete spalling. Get it checked early.