IQHab › United States › Windows & Doors › Window Leaking — Causes & Fixes
Window leaking
A leaking window can damage walls and trim. Find the source and stop the moisture.
Before anything — check these
If any of these are true, stop and get professional help now:
- Active dripping
- Soft or stained drywall
- Mold smell
Safe checks you can do
Tick what you've checked. Only do homeowner-safe actions.
Likely causes
| Cause | Likelihood | Severity | Cost |
|---|---|---|---|
| Failed caulking or seal | high | Low | $10–$100 |
| Improper flashing | medium | Medium | $200–$500 |
| Condensation / humidity | medium | Low | $0–$100 |
| Siding or roof issue above | low | High | $300–$1,500 |
Recommended next action
Re-caulking fixes many leaks. If the flashing or siding is the issue, call a contractor before it causes damage.
Plan the fix
Once you know roughly what's wrong, size the job and get a cost range:
Window Replacement Planner