Overview
- During the cold spell, condensation forms as warm, moist indoor air meets cold glass, increasing the risk of mould, damp and damage to frames.
- Experts recommend “burping” rooms with brief window openings, wiping panes daily, keeping internal doors closed, and allowing airflow around furniture to reduce moisture quickly.
- Trickle vents should stay open in winter, and kitchen or bathroom extractor fans should run during and after cooking or showers for 15–20 minutes.
- Moisture on the outside of efficient double or triple glazing typically clears on its own, whereas misting between panes signals a failed sealed unit that requires replacement.
- Technical steps include checking and replacing failed seals, adding trickle vents or extractor fans as cost‑effective measures, and considering higher‑efficiency glazing; an overnight run of a dehumidifier also cleared window moisture in a reporter’s test.