Ceiling leak: causes, risks and early diagnosis
Why ceilings leak, why early professional diagnosis matters, and how Singapore HDB flat owners share repair costs.
What usually causes it
According to a vendor’s guide, a ceiling leak often traces back to faulty waterproofing: in HDB flats the original waterproofing membrane is said to last about 15-20 years, and hairline cracks and faulty waterproofing are frequent causes.
The same vendor’s guide says long moisture exposure can corrode the steel reinforcement inside the concrete, so the concrete cracks and can fall.
What to do first
According to a contractor’s guide, move valuables out of the way and photograph the damage, and do not poke a sagging ceiling because it can collapse.
According to the same guide, painting over a leak traps moisture and grows mould.
When to call a contractor
According to a contractor’s guide, early professional diagnosis matters.
In Singapore HDB flats, a legal advice article says upper and lower flat owners share party-structure repair costs 50-50, and that an HDB repair assistance scheme co-pays 50% (capped at S$300 per location). Confirm with HDB.
What providers publish
Indicative prices published on provider websites on the dates shown. They are not quotes.
| Provider | Price | Unit | Source | Seen |
|---|---|---|---|---|
| RK Reno Solution | RM 150–300 | per injection point | Source | 2026-10-04 |
Updated 4 Oct 2026