Facade leaks require checks of cracks, window joints, service penetrations, and top edges.
Common warning signs
Interior stains, mould, or peeling paint that worsens after rain.
Likely causes
Wall cracks, aged sealant, and unsealed penetrations.
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
Repair from the weather side, reseal junctions, and use a UV-resistant facade system.. 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.