Condensation Between Double Glazing
Misting or fogging between the two panes of a double-glazed unit, which cannot be wiped away.
What Is Causing This?
- 1Seal around the edge of the sealed unit has failed
- 2Desiccant inside the unit has become saturated
- 3Excessive heat exposure (e.g. south-facing) accelerating seal breakdown
How Urgent Is This?
This is a cosmetic issue. It is not causing damage and can be addressed in your own time.
What Needs to Be Done
A window fitter will replace the failed sealed unit (the glass, not the frame) with a new double or triple glazed unit. This is a straightforward swap in most frame types.
How Much Will It Cost?
National average estimate
Labour: £173 – £425 | Materials: £663 – £2,200
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Prices are estimates based on typical UK rates. Actual costs depend on the specific issue, accessibility, and your location. All quotes from tradespeople on Tradesfolk are completely free.
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Try Snap and FixHow to Prevent This
Choose sealed units with a good warranty. Avoid directing intense heat sources at windows. Replace units promptly when misting first appears.
Related Problems
Other Window Fitter Problems
A window that will not shut fully, leaving a gap, or that requires excessive force to close and lock.
Cold air blowing in around a closed and locked window, making the room feel cold near the window.
A window handle that has snapped, come loose, or no longer engages the locking mechanism.
A crack running through a window pane, which may be from an impact or have appeared without obvious cause.