Window leaks are not always sealant; frame drains and facade cracks above are common sources.
Common warning signs
Drips at corners, sill water, or blistered paint that worsens in wind-driven rain.
Likely causes
Aged sealant, blocked weep holes, failed frame joints, or facade cracks.
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 drains, remove failed sealant, reseal correctly, and perform a controlled spray test.. 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.