General guidance, not an inspection or diagnosis. Repair advice has not been independently reviewed by a tradesperson. How these guides are prepared.
What to do now
Keep clear of a sagging ceiling and any wet light fittings. If the area is actively bulging or electrical equipment is wet, treat it as urgent.
Common causes
- Roof / flashing leak after rain
- Pipe or bathroom leak above
- Overflowing gutter or roof drainage
- Air-conditioning condensate leak
The exact cause cannot be confirmed from a symptom alone. The first professional should inspect before repair work is authorised.
What the professional may do next
- Determine whether rain triggers the leak
- Check what services / rooms are above
- Stop water source
- Repair source before ceiling restoration
What should I ask about the price?
Ask for an itemised quote covering the inspection or call-out fee, labour, materials, GST, access, disposal and any after-hours charge. Ask what happens if extra damage is found. A reliable price needs details of the actual job; this guide does not provide an estimate.
Who may be responsible?
Owner / landlord / strata
The source determines responsibility. Common-property roofs or pipes may involve strata; tenants should notify the property manager.
Tenancy, strata, insurance and boundary responsibilities vary by circumstance and state, so confirm responsibility before non-emergency work where practical.
Questions to ask before hiring
- Are you appropriately licensed or registered for this work in my state?
- Does the quote include call-out, labour, parts/materials, GST and disposal?
- What is excluded from the quoted scope?
- If you find additional damage, will you get approval before doing extra work?
- What workmanship or product warranty applies?
Keep people clear of the affected ceiling
Describe drips, staining, sagging or cracking from a safe position. Stay out from under damaged plaster and keep clear of nearby electrical fittings. Do not puncture the ceiling or enter the roof space to investigate.
Explain the timing to the repair business
Mention whether it follows rain or use of a bathroom above, and whether the symptom has stopped. Ask who will investigate the water source, who will assess the damaged ceiling and whether drying and reinstatement are separate items. A dry surface does not confirm the source is fixed.
Sources and review status
Prepared for Home Triage Australia. Updated 25 October 2026. Not independently reviewed by a qualified tradesperson. This source supports general principles; it is not an assessment of your property.
Run this problem through the checker, then contact a suitable professional of your choice.
Run water through ceiling triage →