- Postcode district
- LL49
- 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
- Pwllheli, Caernarfon, Dolgellau
- Building rules
- Wales
Common sliding door faults we fix in Porthmadog
Here is what usually goes wrong with sliding doors, and what can be done about it:
If a sliding door at your Porthmadog home has started to drag, clean the bottom track thoroughly before booking anything, as grit alone can cause the problem.
Where an older sliding door in Porthmadog 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.
- Misted sealed units can usually be replaced individually with new safety glass units, restoring the view and the insulation of that panel.
- A new lock gearbox or cylinder restores secure locking when a handle turns but the bolts no longer engage, without replacing the whole door.
- A well-maintained, repaired door can give years more service, making a repair a sensible first step when the frame and glass are otherwise sound.
Typical repair costs around Porthmadog
Repair prices are the same across Gwynedd. 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 |
| Roller replacement (per sliding panel) | £185–£325 |
| Re-alignment, adjustment and service | £125–£195 |
| Lock or gearbox replacement | £165–£295 |
From photos to fixed door in Porthmadog
Repairs in Porthmadog start with photos or, if needed, a diagnostic visit. Once you approve the price we book the repair: most repairs are booked within a few weeks, parts permitting, and specialist parts are ordered where needed.
Do you need approval in Porthmadog?
Repairs to rollers, tracks and locks do not need approval in Wales; a whole new door does, under the Building Regulations as applied in Wales.
Common repairs and upgrades
- Lock and gearbox replacement. A new mechanism when the handle turns but the door will not lock.
- Track repair or refurbishment. Repairing damaged track sections, or fitting a new track cover where the system allows.
- Handle replacement. Replacing broken or loose handles, including key-lockable versions.
Questions about sliding door repairs in Porthmadog
Is there a call-out charge in Porthmadog?
Many faults can be priced from photos or a short video, so a visit is not always needed. If we need to see the door first, a diagnostic visit costs £95 inc VAT, and we confirm it before we attend. Repair prices include the visit to carry out the repair.
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.
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.
How can I stop my sliding door needing repairs?
Keeping the track clean is the most effective way to keep a sliding door running well, because grit wears rollers and damages the track surface. Vacuum the track regularly, wipe it with a damp cloth, keep drainage slots clear and avoid slamming panels into their stops. Our maintenance guide has a simple routine.