Can the rollers on a sliding patio door be replaced, or is the door finished?

They can be replaced on nearly every sliding patio door. The panel comes off the track, the worn rollers are pulled from its bottom rail and matching ones fitted, then the height is set so the door runs level and latches. It's a two-person job.

The slider closes, but the latch won't catch. What's gone wrong?

Usually the panel has sunk on worn rollers and the latch now sits too low to catch. Raising or replacing the rollers lines it up again. If the door glides freely and still won't catch, the lock or keeper itself is worn and can be replaced.

Is an older wood patio door worth repairing?

Often. A wood slider or garden door can take new rollers, hinges, weatherstrip and glass, and small patches of rot can be cut out and filled. If the sill and bottom of the frame are soft right through, price a new door too.

Is a patio door repair kit enough to fix the rollers?

Sometimes. If you can identify the exact roller, a kit can work, but many rollers look alike and aren't, and a wrong one rides badly or chews the track. A pro brings the matching part and adjusts the door so it latches.

In a condo, who pays for balcony door repairs?

It depends on the declaration and the corporation's rules. Balcony doors are usually common elements, so some repairs fall to the corporation and some to the owner. Ask property management before booking anything, and keep their answer in writing to send with your request.

Sliding patio doors

Sliding door dragging or stuck? Fix the rollers and track first

A sliding patio door that needs a shove or hops its track is rarely a worn-out door. In a house, and in the balcony sliders of Markham's newer towers, the cause is usually tired rollers, a gritty or dented track, or a latch that has drifted below its keeper, all swapped while the glass and frame stay put. We connect you with an independent local pro who repairs sliders; they'll say plainly whether it's a parts job.

Rollers and tracks, not the door
A short video helps the quote
Balcony sliders: board first

Get a free quote 905-201-8120

Grit in the track and a flattened roller.

What it's doing

Why sliding doors get hard to move

Won't slide, or needs both hands

Rollers worn flat or seized solid, or grit and leaves lodged in the track. Sometimes the rollers just need raising.

Won't lock or latch

Worn rollers lower the panel until the latch no longer lines up. Raising them often cures it.

Came off the track

Usually a broken roller or a bent track. The panel is heavy, so leave it closed until it's looked at.

Whistles or lets in water

Flattened weatherstrip or blocked drain holes. See the checks below.

The parts

Rollers, tracks, handles and locks: what can be swapped

Rollers sit in the bottom rail of the sliding panel, most with an adjustment screw; replacing them means lifting the panel out. A grooved or dented aluminum track can often be capped with a new rail.

Handles and locks are matched to the originals; for a discontinued door, photograph the hardware and any frame label. The screen has rollers too, and screen door repair can happen on the same visit.

Drafts and leaks

Drafts and water at the sill

Clear the track and drain holes
Weep holes in the sill let rainwater out. When grit blocks them, water backs up in a downpour. Vacuum the track and clear them.
Replace the weatherstrip
The pile strips along the panel edges flatten with use, and new ones stop the whistle.
Have the sill checked
Water on the floor below, or a soft subfloor, means the sill or flashing may have failed.

The glass

Fogged or cracked patio door glass

A slider's sealed unit can be replaced without replacing the door. It must be tempered or laminated under the Ontario Building Code safety-glazing rule (2012/2017 text; the pro confirms the current edition), so it's ordered to size.

Fog or haze between the panes

The edge seal has failed. A new unit goes into the existing panel, grilles matched. See foggy sealed units.

A crack or a chip

Keep the door shut and pets and children clear. Door glass replacement explains what to photograph.

Past repair

Signs repair won't be enough

A frame rotted at the sill or twisted so the panel binds on new rollers, leaks that continue after the drains and weatherstrip are sorted, or parts no longer made. Any of these makes a new patio door worth pricing too.

What affects the repair

What a sliding door repair quote depends on

Which parts have failed: rollers, track, lock or weatherstrip
Whether the panel comes out, and its weight
Whether parts for your door are still made
Track condition: cleaned, capped or bent
Access, including condo elevator bookings

A short video of the door moving and its size allow a first figure, confirmed on site.

Get a sliding door quote

Nothing to pay for asking. The pro prices the job.

Condo balcony doors

Condo balcony sliders: who's responsible

In most Ontario condos, balcony doors are common elements. The corporation generally decides who repairs them, and changing one needs board approval and a section 98 agreement first.

Start with property management, and send their answer with your request. In the towers of Markham Centre, ask about elevator booking too.

Questions

Sliding door repair questions

Explore your options

Pros we work with repair sliders in houses and towers, including Markham Centre, Milliken Mills, Thornhill, Berczy Village and Box Grove.

Film the door moving and send it

A few seconds of the door opening and closing, and a close shot of the track, usually shows what's worn. We send it to a slider pro; if it's only rollers, they'll say so.