What misted double glazing repair really costs on Teesside (2026)
Replacing a misted sealed unit on Teesside costs £80–£150 for standard sizes and £150–£250 for large or bay units, fitted in under an hour with your frames untouched. Specialist glass (toughened, laminated, acoustic) adds £30–£80, and 3+ units in one visit usually earns a 15–25% discount.
Misted double glazing is the most common window job on Teesside and the one with the widest quote spread. This guide is the honest pricing picture for 2026, what a sealed unit swap should cost, what legitimately moves the number, and the point where a misted unit is telling you something bigger about the window.
The headline numbers
| Unit type | Price (fitted) | Typical job time |
|---|---|---|
| Standard unit (up to ~1m²) | £80–£150 | 30–45 min |
| Large unit / bay section | £150–£250 | 45–75 min |
| Patio door pane | £150–£280 | ~1 hour |
| Specialist glass uplift | +£30–£80 | n/a |
| 3+ units, same visit | 15–25% off | n/a |
The price is mostly the glass: the unit is made to measure (thickness matters, 24mm and 28mm dominate Teesside's stock), so there's no off-the-shelf shortcut. Labour on a straightforward ground-floor swap is genuinely under an hour.
What moves the price
Size is the big one, glass prices by area. Glass spec: standard float glass is the baseline; toughened (required low-down and beside doors), laminated, acoustic or patterned glass adds £30–£80. Coatings: matching an existing low-e or tinted unit to its neighbours costs a little more and is worth it, a mismatched pane in a run of windows shows. Access: ground floor beads-out swaps are the baseline; upper floors needing scaffold or a tower add cost. Condition of the frame: perished gaskets or a warped sash discovered mid-job are extras, honestly arrived at, or warning signs of a bigger problem.
The 'demisting' scam to avoid
One offer to refuse: companies proposing to drill the unit and 'demist' it for £40–£50. It clears the fog temporarily, destroys the unit's thermal seal permanently, and the mist returns, you've paid half the price of a proper unit for a worse window. A new sealed unit with a 5–10 year warranty is the only repair that counts.
When the mist is a message
One failed unit on a 15-year-old window is bad luck, swap it. A third failed unit on the same elevation, with perished gaskets and stiff hardware, is the window system reaching end of life. At that point the maths flips: £400–£700 per window for full replacement beats serial £150 unit swaps into failing frames. Our repair vs replace guide has the decision checklist.
Getting real numbers
Every price above is a range because unit size and glass spec vary. The quote form takes two minutes, what comes back fast is a number you can plan around.