Sliding door repairs across County Londonderry
Most sliding door problems come down to a handful of worn parts, and a repair is often far cheaper than a new door:
Where an older sliding door in County Londonderry 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.
Is the patio door in your County Londonderry house leaking at the bottom after heavy rain? Check the drainage slots in the outer frame are clear before assuming a seal has failed.
- Repairing or refurbishing a damaged track removes the dips and burrs that make rollers jump, which stops a panel coming off its track.
- Misted sealed units can usually be replaced individually with new safety glass units, restoring the view and the insulation of that panel.
- Adjusting a dropped or misaligned panel can cure draughts, rattles and a door that will not close fully against its seals.
Repair prices in County Londonderry
Repair prices are the same across County Londonderry. These guide prices include VAT, parts and the visit to carry out the repair. Most faults can be priced from photos; if we need to see the door first, a diagnostic visit costs £95 inc VAT, confirmed before we attend.
| Repair | Guide price inc VAT |
|---|---|
| Re-alignment, adjustment and service | £125–£195 |
| Misted sealed unit replacement (per pane) | £225–£495 |
| Roller replacement (per sliding panel) | £185–£325 |
| Handle replacement | £95–£165 |
| Lock or gearbox replacement | £165–£295 |
Towns we cover in County Londonderry
We survey and fit sliding door repairs in 7 towns across County Londonderry, including the BT45, BT46, BT47, BT49, BT52, BT55 postcode districts.
Approvals in Northern Ireland
Repairs do not normally involve building control in Northern Ireland. Any replacement glass we fit in a door is safety glass. Northern Ireland repairs are by arrangement.
Questions about sliding door repairs in County Londonderry
Is it worth repairing an old sliding door in County Londonderry?
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.
Can you replace misted glass in a sliding door?
Yes, a misted sealed unit in a sliding door can usually be replaced on its own without changing the frame. The new unit is made to the size of the old one in safety glass, as glass in doors must be, and fitted into the existing panel. It is worth checking whether the frame is still sound first.
Is it worth repairing an old sliding patio door?
Repairing an old sliding patio door is worth it if the frame and glass are sound and the parts are available, because a few new rollers or a lock can restore it for a fraction of the cost of replacement. If the frame is failing, the door is single glazed or parts are discontinued, replacement usually makes more sense.
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.