Last updated: 2026-10-10
Seepwise arranges window leak repair for Singapore homes where water comes in around window frames during heavy rain. In HDB flats, windows are among the fittings the owner is responsible for (HDB), so this is a job you arrange yourself.
What happens on the first visit
The specialist checks the sealant around the frame, the weep holes at the bottom of the frame track, the joints in the frame itself, and the wall around the opening for cracks. A controlled water test on the outside, where safe, shows exactly where water crosses into the room.
Where window leaks come from
- Perimeter sealant shrinking and cracking in the sun, opening a gap between frame and wall
- Blocked weep holes so water collects in the track and overflows inward
- Frame joints opening at the corners
- Wall cracks beside the window carrying water around the frame
Timing: the storms that find them
Window leaks show during wind-driven rain, which in Singapore means monsoon surges in December and January and the afternoon thunderstorms of the inter-monsoon months, late March to May and October to November (World Bank). Book the inspection while the pattern is fresh.
The repair
Failed sealant is removed and replaced with a compatible sealant, weep holes are cleared, frame joints resealed, and any wall cracks injected. If water has already damaged plaster below the window, that is made good after the leak is fixed.
What is included
- Sealant, weep holes and joints checked
- Wall cracks around the opening checked
- Controlled water test where safe
- Old sealant removed, new sealant applied
- Weep holes cleared
- Frame joints resealed
- Cracks injected where needed
- Interior made good after
Painting over it vs a quick fix vs a proper repair
| DIY | Quick fix | Proper repair | |
|---|---|---|---|
| Approach | Silicone over the gap | More sealant on top | Old sealant out, cause fixed |
| Weep holes | Unknown | Ignored | Cleared |
| Wall cracks | Missed | Missed | Checked and injected |
| Tested | Next storm | Next storm | Water test |
| Lasts | Months | Months | Years |
What it costs
Window leaks are priced per opening after inspection.
Try the cost estimator or read the waterproofing cost guide.
Related guides
- How to Choose a Waterproofing Contractor in Singapore
- How Much Does Waterproofing Cost in Singapore (2026)?
How it is done
- Inspect. Sealant, drainage, joints and wall.
- Test. Controlled water test where safe.
- Repair. Sealant replaced, weep holes cleared, cracks injected.
- Make good. Interior plaster and paint after.