- Postcode district
- BS35
- Survey
- Priced from photos or a diagnostic visit
- Booking
- Most repairs are booked within a few weeks, parts permitting
- Guide price
- From £95 inc VAT
- Nearby
- Yate, Chepstow, Lydney
- Building rules
- England
Common sliding door faults we fix in Thornbury
Here is what usually goes wrong with sliding doors, and what can be done about it:
Where an older sliding door in Thornbury has several faults at once, such as misted glass, worn rollers and a failing lock, compare the total repair cost with a replacement before deciding.
Landlords with properties in Thornbury can often keep a sound sliding door working with a roller and lock service rather than a full replacement.
- Quoting from photos and a short video means many repairs can be priced without a visit, saving time and the diagnostic visit charge for straightforward jobs.
- Misted sealed units can usually be replaced individually with new safety glass units, restoring the view and the insulation of that panel.
- Repairing or refurbishing a damaged track removes the dips and burrs that make rollers jump, which stops a panel coming off its track.
Typical repair costs around Thornbury
Repair prices are the same across Gloucestershire. The table shows typical costs for common repairs, including VAT, parts and the visit to carry out the repair.
| Repair | Guide price inc VAT |
|---|---|
| Misted sealed unit replacement (per pane) | £225–£495 |
| Track repair or refurbishment | £195–£395 |
| Re-alignment, adjustment and service | £125–£195 |
| Roller replacement (per sliding panel) | £185–£325 |
From photos to fixed door in Thornbury
Send photos or a short video of the fault and we tell you the likely repair and cost before anyone visits. We then book a repair visit in the BS35 district at a time that suits you; most repairs are completed in a single visit, unless parts need ordering or a new glass unit must be made.
Rules for sliding door repairs in England
Like-for-like repairs such as new rollers, locks, handles or adjustment are not building work under the Building Regulations in England. If the whole door is replaced, it becomes a controlled fitting and the replacement rules apply.
Common repairs and upgrades
- Roller replacement. New rollers for each sliding panel, restoring a smooth, quiet action.
- Lock and gearbox replacement. A new mechanism when the handle turns but the door will not lock.
- Handle replacement. Replacing broken or loose handles, including key-lockable versions.
Questions about sliding door repairs in Thornbury
Is it worth repairing an old sliding door in Thornbury?
Often, yes. New rollers, a lock gearbox or a track refurbishment cost a fraction of a new door. If the frame is twisted or the door fails on thermal performance, we will say so and price a replacement instead.
What photos should I send for a repair quote?
Send a photo of the whole door from inside, close-ups of the handle, the lock edge and the bottom track, and any label or marking on the frame or glass spacer. A short video of the door opening and closing is especially helpful. Tell us roughly how old the door is and what it is doing wrong.
How do I know if my sliding door rollers need replacing?
Sliding door rollers usually need replacing when the panel becomes hard to push, rumbles or grinds as it moves, sits lower at one end or jumps off the track. Cleaning the track first is worth trying, because grit can cause similar symptoms. If the door is still heavy once the track is clean, the rollers are likely worn or broken.
Why won't my sliding door lock?
A sliding door that will not lock usually has a failed lock gearbox, a worn or broken keep, or a panel that has dropped so the hooks no longer line up with the frame. Forcing the handle can make it worse. Photos of the handle, the lock edge and the frame where the hooks engage usually show which part has failed.