Blown window repair cost
Blown or misted double glazing repair cost.
A blown or misted double-glazed window is repaired by replacing only the failed sealed glass unit — the frame stays. As a guide that is from £65 per unit fitted, or from £400 for several units in one visit (typically four to five). The price depends on the size of the unit, the type of glass and access, and is confirmed in a free quote with no call-out charge.
Short answer
A blown or misted double-glazed window is repaired by replacing only the failed sealed glass unit — the frame stays. As a guide that is from £65 per unit fitted, or from £400 for several units in one visit (typically four to five). The price depends on the size of the unit, the type of glass and access, and is confirmed in a free quote with no call-out charge.
Typical A&E guide prices (Essex, 2026)
| Job | Typical A&E guide price | When it applies |
|---|---|---|
| Misted / blown sealed unit (each) | from £65 per unit fitted | One foggy or blown pane replaced in a sound frame. |
| Several units in one visit / whole house | from £400 | Typically four to five units replaced in a single visit. |
| Toughened safety glass replacement | from £65 | Where safety glass is required, such as doors and low panes. |
| Laminated glass replacement | from £85 | Higher-security or noise-reducing laminated panes. |
| Obscure / patterned bathroom glass | from £95 | Privacy glass for bathrooms and side panels. |
| Conservatory misted unit replacement | from £65 per unit | Foggy conservatory glass replaced in a sound frame. |
These are typical A&E guide prices, not fixed quotes. Every job is priced individually once we have seen the actual fault, size, glass, access and urgency — your exact price is confirmed in a free, no-obligation quote with no call-out charge. Over-60s receive a discount on all repairs.
Visible proof customers can recognise
What changes the price of a blown unit
| Factor | Why it matters | What to send |
|---|---|---|
| Unit size | Larger units cost more to make and need more handling. | Rough width and height of the glass. |
| Glass type | Toughened, laminated, obscure or low-E glass is priced differently. | Photo of the glass and where the window is (door, bathroom, low pane). |
| Number of units | Several units in one visit is better value than separate call-outs. | How many panes are misted. |
| Access | Upper floors, conservatory roofs and awkward openings change the work. | Room, floor level and access notes. |
| Frame condition | A new unit only fixes the glass; a failing frame needs a different answer. | Say whether the window opens, closes and locks normally. |
What “blown” actually means
“Blown”, “misted”, “foggy” and “failed” all describe the same fault: the seal around the edge of the double-glazed unit has broken down and moist air has got between the panes. Wiping the glass will not clear it, because the moisture is inside the unit.
Repair, not a new window
If the frame is sound, there is no need to replace the whole window. We measure the failed unit, have a new one made to size and fit it into your existing frame, so the glass is clear again for a fraction of the cost of a new window. That usually means one visit to measure and a return visit to fit.
Blown window repair across Tendring and Colchester
We replace blown units across Clacton-on-Sea, Holland-on-Sea, Frinton-on-Sea, Walton-on-the-Naze, Great Holland, Brightlingsea, Harwich, Manningtree and Colchester. If several panes have gone, grouping them into one visit keeps the cost down.
Signs a unit has blown
- Mist or droplets between the panes.
- Cloudy or milky glass that will not wipe clean.
- Water marks or streaks inside the unit.
- Worse on cold mornings, clearer later in the day.
- The frame still opens, closes and locks normally.
Related repair pages
FAQs
- How much does it cost to replace a blown double glazed unit?
As a guide, a misted or blown sealed unit is replaced from £65 per unit fitted, or from £400 for several units in one visit (typically four to five). Every job is priced individually after we have seen it, with a free quote and no call-out charge.
- Do I need a new window if the double glazing has blown?
Usually not. If the frame is sound, only the sealed glass unit is replaced and the frame stays.
- Can blown double glazing be fixed without replacing the glass?
Not durably. Once the edge seal has failed, the lasting fix is a new sealed unit made to fit your existing frame.
- How long does it take to replace a misted unit?
The unit is measured first and fitted on a return visit once it has been made to size.
- Do you charge a call-out fee?
No. Quotes are free with no call-out charge, and over-60s receive a discount on all repairs.
Get a free, no-obligation quote
Tell us what's wrong and the team will come straight back with the next step — no call-out charge, over-60s discount. For urgent boarding-up, call the office direct.
Tell us what needs fixing.
Include the fault, location, photos and whether the property is secure. That gives the team the best chance of advising quickly.