Roof water can travel along the structure, so an indoor stain may be far from the entry point.
Common warning signs
Ceiling drips after rain, cracks, ponding, or slow roof drains.
Likely causes
An aged membrane, cracked junction, blocked drain, or failed flashing.
Safe inspection steps
- Turn off the nearby power or water supply and protect people and furniture.
- Record when the mark appears, the weather, and recent water use; the visible stain may not be the source.
- Check joints, drains, supply pipes, and adjacent rooms. Use moisture or pressure testing when needed.
Recommended repair
Clear drainage, repair cracks, and restore a continuous system suited to the roof.. Confirm the work area, materials, timing, and price before work. Test with water after completion and monitor nearby surfaces.
When to call immediately
Stop DIY work when water keeps dripping, finishes swell, mould spreads, or moisture is close to sockets or electrical panels. Phnom Penh humidity and heavy rain can make hidden damage grow quickly.