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Winter Window Condensation in 6 Steps: Dry Surfaces and Control Moisture

EPA-based steps to dry condensation, identify indoor moisture sources and ventilate without masking ongoing leaks.

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US EPA

EPA guidance on controlling home moisture and condensation.

Link card to the EPA moisture-control article

Window droplets in cold weather may be condensation on a cold surface, but water intrusion through a frame requires a different repair. Watch when and where moisture appears.

Your try-it-at-home checklist

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1. Wipe droplets from glass and frames with a soft dry cloth, dry the cloth afterward, and check for standing water near seals.
2. Note when moisture forms: after showers, cooking, indoor laundry drying or humidifier use.
3. Use bathroom and kitchen exhaust fans during moisture-producing activities and check that they vent appropriately outdoors.
4. Check relative humidity with a hygrometer; reduce unnecessary humidification when droplets collect on cold surfaces, rather than relying on one universal target.
5. Ventilate briefly when weather and outdoor air quality allow; keep curtains and furniture from remaining wet against glass or walls.
6. If wet patches keep returning or you suspect mold, wall damage or rain intrusion, ask building management or a professional to investigate the cause.

EPA guidance on controlling home moisture and condensation.

Your try-it-at-home checklist

Further reading

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