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Common Water Issue in BC
Excessive Window Condensation — More Than Just Weather
Persistent window condensation in BC homes during winter may indicate humidity problems, inadequate ventilation, or in some cases, hidden moisture sources like leaks that are raising indoor humidity levels abnormally.
Possible Causes
- •High indoor humidity from unidentified moisture source such as hidden leak
- •Inadequate ventilation in bathrooms, kitchens, and laundry areas
- •Failed window seal or thermal break in older windows
- •Humidifier set too high for winter conditions
- •Crawlspace or basement moisture migrating upward through the building
Recommended Steps
- 1Measure indoor humidity with a hygrometer — target 30-50% in winter
- 2Check if condensation is between window panes (seal failure) or on interior surface
- 3Inspect for other signs of hidden moisture — musty odours, stains, mould
- 4Improve ventilation — use exhaust fans and crack windows during high-moisture activities
- 5If humidity remains high despite ventilation, call for a professional moisture investigation
Need Professional Help?
Don't let a small leak become a big problem. Contact LeakInspections.ca — a division of Anyleak.ca and Leak.ca — for expert diagnosis.