Condensation repair guide
Your guide to fixing window condensation problems.
Window condensation needs the right diagnosis. Moisture on the room side can be ventilation or humidity; condensation between panes usually means the sealed unit has failed and may need replacing. The repair depends on where the moisture is appearing.
Short answer
Window condensation needs the right diagnosis. Moisture on the room side can be ventilation or humidity; condensation between panes usually means the sealed unit has failed and may need replacing. The repair depends on where the moisture is appearing.
Visible proof customers can recognise
Where the condensation appears matters
Condensation inside the room, outside the glass and between panes mean different things. Between-pane misting is the high-intent repair problem because the unit has usually failed.
Do not replace frames too quickly
If only the sealed unit has failed and the frame is sound, glass-only replacement may solve the problem without full window replacement.
Common decisions this page covers
- Room-side condensation
- External condensation
- Misted sealed units
- Failed glass units
- Ventilation checks
- Glass-only replacement
Related pages
Questions customers ask
- Can double glazing be repaired instead of replaced?
Often, yes. Misted units, hinges, handles, locks, seals and alignment faults can often be repaired when the frame is sound.
- When is replacement the better answer?
Replacement is usually better when the frame, security, finish or long-term performance cannot be restored by targeted repair.
- What should I send for a quote?
Send photos, your location, the number of affected windows or doors and whether the property is currently secure.
Tell us what needs fixing or replacing.
Include the fault, location, photos and whether the property is secure. That gives the team the best chance of advising quickly.