A homeowner guide from Ellis Services
What you notice, what to record and what to ask
Describe the pattern without deciding the cause yourself. Record these details from indoors or ground level; roof access and diagnosis need suitable conditions and the right equipment.
| What you notice | Record this safely | Ask the assessment to consider |
|---|---|---|
| A stain appears only in heavy rain | Which room is affected, when the stain starts and whether a nearby gutter overflows. | The roof water-entry path and drainage together; rain timing alone does not identify the fault. |
| Drips return with wind-driven rain | Whether the same weather direction is involved and whether there is a nearby skylight, wall junction or recent roof work. | Relevant flashings, overlaps and penetrations, including areas beyond the visible ceiling mark. |
| The gutter overflows and water appears indoors | The gutter run that spills, the affected room and which happens first. | The gutter, outlet, downpipe and adjoining roof details; a clean gutter is not proof of a watertight roof. |
| Moisture appears without rain | The time, room and any relationship to plumbing use or condensation. | Whether roof leakage, plumbing or condensation needs investigation before a roof repair is chosen. |
Sydney rain and wind through the year
NSW SES identifies September–April as storm season, while major storms can occur at any time. East coast lows can bring heavy rain and damaging winds to the NSW coast, with a peak in late autumn and winter. Tell us whether your leak follows intense rain, wind-driven rain or gutter overflow; this helps plan an inspection, rather than proving the source.
What the timing can tell you
A leak in heavy rain may involve overflow or a junction that cannot shed water quickly enough. A leak during wind-driven rain may involve flashing, laps or an exposed penetration. Moisture that appears without rain may have another source, including plumbing or condensation. These patterns help narrow an inspection; they do not prove a cause.
- Record the room and position of the stain, when it first appeared and whether it changes with rain.
- Photograph ceiling marks and accessible exterior details from a safe position.
- Mention a recent solar, antenna, skylight or roof installation and any previous repairs.
Why a surface patch can miss the problem
Water may travel along battens, rafters or the underside of a sheet. The entry point could be above or beside the visible stain. Sealant applied over an unidentified source can divert water, hide deterioration or fail with movement. A repair scope should identify the suspected cause, the affected materials and the evidence used to select the repair.
What a leak inspection should consider
The inspection scope depends on safe access and roof construction. Relevant points can include broken tiles, ridge capping, valleys, flashings, sheet laps, fasteners, penetrations and drainage. Roof-space observations may help if access is safe and authorised. Ask what was checked, what was inaccessible and whether further testing is needed.
When the situation is urgent
A sagging ceiling, falling material, water near electrical fittings or visible structural movement needs immediate attention. Keep people away from the affected area. Do not enter the roof space or climb onto a wet roof. For immediate danger call 000; for storm or flood emergency assistance in NSW call 132 500.
When the gutter and the ceiling both leak
Treat these as two observations to connect during assessment. Note which gutter run overflows, the affected room and whether the indoor drip begins at the same time. A gutter clean can remove debris; it does not establish that the roof junction above the room is sound. Ask whether both the roof covering and drainage will be assessed, and what further investigation is needed if the source remains uncertain.
Common questions about rain and storm damage
Why does my roof leak only in heavy rain or strong wind?
Intense rain can reveal a blocked outlet or a drainage problem; wind-driven rain can enter a vulnerable flashing, tile overlap or roof penetration. The timing is a useful clue, but an inspection needs to follow the water path and check the surrounding roof before choosing a repair.
Why is the ceiling still damp after the rain stops?
Moisture can remain in roof layers, insulation or ceiling materials after water entry stops. A drying ceiling does not prove the leak is repaired. Record the stain and arrange an assessment of the entry point and affected materials; keep clear if the ceiling is sagging or water is near electrical fittings.
Plan your next step
Do not climb onto a wet or damaged roof. Keep clear of sagging ceilings and electrical hazards. For a life-threatening emergency call 000; for NSW SES storm or flood emergency assistance call 132 500.
Related services
Official sources for further reading
Official homeowner and safety information:
Service NSW: check a builder or tradesperson licenceNSW SES: storm and flood emergency assistance
SafeWork NSW: asbestos safety