Misted window repair · Semilong
Misted double glazing & condensation between panes fixed in Semilong
Misted window repair in Semilong, done properly and priced fairly. Condensation trapped between the panes means the seal on your double glazed unit has failed. In Semilong we measure, make and fit a brand-new sealed unit into your existing uPVC, aluminium or timber frame — restoring clear views and insulation for a fraction of the cost of a new window.
- Local engineers in Semilong
- No call-out fee
- Guaranteed workmanship
Signs your sealed unit has blown
- Visible gaps or cracks in the spacer bar around the edge
- Mist that comes and goes with the weather and sunlight
- Fog or droplets between the two panes that won't wipe off
- Room feels colder near the window than it used to
- White streaks or cloudy staining inside the glass
How we replace a misted unit
1. Measure
We measure the glass precisely and check the frame, beads and drainage.
2. Manufacture
Your new unit is made to size — clear, obscure, toughened or A-rated energy glass.
3. Fit
The old unit comes out, the new one goes in and the beads are refitted. Usually under an hour per window.
Replacing only the glass unit keeps your frames, avoids building work and typically costs far less than a whole new window.
Why it breaks: what our engineers find in Semilong
Age of the seal
Sealed units are bonded with a perimeter sealant that slowly breaks down. After 10–20 years many units start letting moist air in between the panes.
Sun and temperature swings
South and west-facing glass heats and cools every day. That constant expansion and contraction stresses the edge seal until it fails.
Poor original fitting
Units fitted without proper packers can sit on the frame unevenly, putting pressure on one corner and splitting the seal early.
Working in Semilong
Semilong is right on our doorstep — we're based in Wootton, so most Northampton visits can be booked within days.
As well as Semilong, we look after the rest of Northampton, including East Hunsbury, Upton, Lings and Hunsbury.
Tell us your postcode and a little about the problem and we'll come back to you with availability in Semilong.
Misted window repair in Semilong: FAQs
Can I upgrade the glass at the same time?
Absolutely — choose obscure privacy glass, toughened safety glass or higher energy-rated glass.
Is the new glass guaranteed?
Yes, every replacement sealed unit comes with our 10-year glass guarantee.
Can misted double glazing be fixed without replacing the window?
Yes. We swap just the sealed glass unit and reuse your existing frame, so there is no mess and no planning needed.
Why is there condensation inside my double glazing?
Condensation between the panes means the unit's seal has failed and moist air has got in. It can't be wiped away — the sealed unit needs replacing.
How quickly can you replace a misted unit in Semilong?
We measure on the first visit and return to fit once the unit is made — usually within one to two weeks.
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