By Restoration Glazing, Chandler's Ford, Eastleigh · Last updated 6 October 2026
At Restoration Glazing in Chandler's Ford, most sticking or heavy sliding patio doors are fixed with a roller and keep adjustment, which takes about 30 minutes and is covered by our £180 minimum visit charge. If the rollers are worn out, replacing them costs £470 including VAT and takes two engineers around two and a half hours.
A sliding patio door gets hard to push when the rollers in the bottom of the sliding panel have dropped, worn flat, or are dragging on grit in the track. The panel sinks a few millimetres, rubs on the frame, and the lock hooks stop meeting the keep.
Most uPVC sliding patio doors are in-line sliders, where the moving panel runs on two roller carriages along a raised rail on the sill. The track is the first thing we look at. Sand, leaves and dog hair pack into it, and the rollers ride over that dirt until they wear. Cleaning the track and adjusting the roller height fixes a lot of doors without any new parts.
Restoration Glazing charges a £180 minimum per visit, and a straightforward roller and keep adjustment fits inside it. Roller replacement is £470 including VAT. The prices below are what we charge for the part and fitting, and the £180 minimum still applies to the whole visit.
| Repair | Typical price | Typical time on site |
|---|---|---|
| Roller height and keep adjustment, track clean | Covered by the £180 minimum visit | About 30 minutes |
| Replace rollers (wheels), panel lifted out | £470 including VAT | About 2 to 2½ hours, two engineers |
| Patio door lock (slider lock) | From £300 | About 1 hour |
| Misted glass unit in a patio panel | From £180 | About 1 hour |
| New uPVC sliding patio door, supplied and fitted | £1,400 to £2,600 | Survey first |
| Minimum charge per visit | £180 |
If we come out to adjust the door and the rollers turn out to be too worn, the replacement price is £470 including VAT for the whole job.
Want an exact price? Call 023 8001 2328 or send us photos for a free quote. Choose "Patio Door" on the form.
Your patio door rollers probably need replacing if the door still drags or judders after the track has been cleaned, or if you can hear grinding or see the panel rocking as it moves. Adjustment can't fix a roller that has worn flat or lost its bearings.
A sliding patio door usually won't lock because the panel has dropped and the hook bolts no longer line up with the keep on the frame, not because the lock has broken. Adjusting the roller height and the keep normally sorts it in the same 30-minute visit.
If the handle feels loose, the key turns but nothing moves, or the hooks don't come out at all, the lock itself has failed. A replacement patio door lock costs from £300 fitted and takes about an hour. Forcing the handle on a dropped door is what wears these locks out, so it's worth getting the door adjusted first. More on locks: uPVC door lock repair.
We find out whether the fault is the track, the rollers or the lock, then fix what we can on the same visit.
A sliding panel with a large double glazed unit is heavy, which is why roller replacement is always a two-engineer job for us.
A roller and keep adjustment takes Restoration Glazing about 30 minutes on site. Replacing the rollers takes two engineers around two to two and a half hours, because the sliding panel has to come out of the frame and go back in.
Roller carriages vary between makes, so a photo of the roller end of the panel (or any name stamped on the frame) helps us bring the right ones. We keep rollers in stock, but some makes have to be ordered in.
A misted glass unit in a patio panel takes about an hour to replace, and fitting a new patio door lock takes about an hour too.
A sliding patio door isn't worth repairing when the track or frame is badly damaged, or when it has several faults at once that add up to a good part of the price of a new door. A new uPVC sliding patio door costs £1,400 to £2,600 supplied and fitted.
If it's worth repairing, we'll say so. A new door is a bigger job than most people need.
A photo of the whole door, a close-up of the bottom of the sliding panel and the track, a line about what's wrong, and your postcode are enough for us to price most patio door repairs.
Use our patio door quote form (pick "Patio Door" and upload your photos), email them to enquiries@restorationglazing.com, or call 023 8001 2328.
Restoration Glazing repairs sliding patio doors across Southampton, Eastleigh, Chandler's Ford, Winchester, Romsey and the rest of Hampshire, plus Salisbury, Basingstoke and Guildford, from our base at Unit 28 Monks Brook Industrial Park, School Close, Chandler's Ford, Eastleigh SO53 4RA.
We're FENSA registered (44665). Our team has 80 years of combined trade experience. For local detail see uPVC door repair in Southampton.
At Restoration Glazing, a roller and keep adjustment is covered by our £180 minimum visit charge, and replacing the rollers costs £470 including VAT. A new patio door lock is from £300 fitted.
Usually, yes. A door jumps off the track when the rollers have worn or dropped too low, so we lift it back on, check the rollers and the rail, and replace the rollers if they're worn. Don't keep sliding it while it's off the track, as that can damage the rail.
Yes, if the frame and track are sound. At £470 including VAT, new rollers cost a fraction of a new uPVC sliding door, which is £1,400 to £2,600 fitted.
Most of the time it's dirt in the track or rollers that have dropped, and a clean and height adjustment fixes it in about 30 minutes. If it still drags after that, the rollers are usually worn.
Yes. French doors hang on hinges rather than rollers, so they're adjusted differently. See how to adjust a uPVC door. Bi-fold lock prices are in our uPVC door repair cost guide.
Repairs by Restoration Glazing come with a 1-year guarantee, and replacement glass units come with 5 years.
Call Restoration Glazing on 023 8001 2328, Monday to Friday, 8:30am to 5pm, or get a free quote online and upload photos of the track and the sliding panel. You can also email enquiries@restorationglazing.com.
