How do I fix a patio door that doesn't slide well?

Vacuum and wipe the track first; grit is often half the problem. If it still drags, the rollers are worn or set too low. Many adjust with a screw at the bottom of the panel, but a flattened roller means lifting the heavy panel out.

Can you replace just the rollers on a patio door?

Yes, and it's among the most common door repairs. The panel is lifted out and new rollers are fitted and adjusted so it runs level. Older doors may need an adapted roller, so attach a photo of the old one to your repair request.

My patio door won't lock anymore. Is it the latch?

Often it isn't. When the rollers wear, the panel drops and the latch no longer meets its keeper. Raising the rollers can line them up again. A cracked latch or a failed spring means a new latch; meanwhile, a bar in the track keeps the door shut.

Patio door hard to open in winter: ice or rollers?

Check the track. Visible ice or packed snow means ice: clear it gently and keep the drain holes open. If the track is clear and the door still resists, the rollers were likely worn already and the cold exposed it.

Does a patio door repair need a permit in Montreal?

The City's always-a-permit rule is written for installing or replacing a sliding patio door. It doesn't spell out roller, latch or weatherstrip repairs, so if you're unsure, ask your borough. Our borough permit guide explains how the counters work.

Patio doors · Montreal

Patio door dragging or not locking? Get it repaired

A patio door that grinds, jumps its track or won't lock is rarely finished. The trouble is usually a moving part: rollers, track, latch or weatherstrip, all replaced with the door in place. That matters here, since a new sliding door means a City permit and, upstairs, a heavy frame carried up an outside staircase. We connect you with an independent local pro who repairs patio doors.

Parts first, door second
Send a short video of the door
Straight answers on permits

Get a free quote 514-312-6772

Each sliding panel rides on two small rollers. When they wear, the whole door feels heavy.

What it's doing

Signs a patio door needs repair

The symptoms as people describe them, and where each tends to lead. If it's the screen panel that sticks, see patio-door screens.

It drags or won't slide well

Flattened or seized rollers, or grit packed into the track. The most frequent sliding-door repair.

It won't lock (ne barre plus)

The panel has sunk on tired rollers and the latch misses its keeper. Raising the rollers often fixes it; a broken latch is replaced.

It's drafty or won't close tight

Worn weatherstrip (coupe-froid) where the panels meet, or a panel sitting crooked.

It came off its track

Usually a collapsed roller or a bent track. A panel with a thermos is heavy, so lift it back only with help.

The usual cause

Rollers and tracks: the most common culprit

Each panel sits on two rollers in its bottom rail. Over the years they flatten or seize and the panel sinks. Then the door drags, the latch misses and the weatherstrip stops sealing.

A dented track chews through new rollers, so the pro checks both. Usually the rollers are replaced and adjusted and the track cleaned or capped. A broken sill is where a new door enters the conversation.

Hardware

Handles, latches and locks

A latch that won't catch

The pro checks the rollers first, since a dropped panel is the usual reason a good latch misses. A cracked latch is replaced with a match.

A loose or snapped handle

Replaced as a pair, inside and out. The handle on a hinged porte de balcon is its own small job; see plex balcony doors.

Extra security

A foot bolt or a bar in the track helps on a ground-floor door. Ask while the pro is there.

Winter

Ice, salt and grit: winter on a Montreal balcony

Winter here crosses the freezing point again and again, and freezing rain comes every year.

Ice in the track

Meltwater runs in by day and freezes overnight. Clear it with a plastic scraper; forcing the handle is how latches break.

Salt and sand

Grit tracked in from outside grinds the rollers and corrodes metal parts. Vacuum the track in spring and fall.

Blocked drain holes

Weep holes along the sill let water out. Keep them clear, or water sits in the track and freezes.

What affects the quote

What a patio door repair quote depends on

Which parts are worn: rollers, latch, handle, weatherstrip, or several
Whether matching parts are still made for your door
The condition of the track and sill
Panel size and weight
Which floor the door is on, and how the pro reaches it

Film a few seconds of the door sliding and locking, and add a photo of the panel's bottom corner.

Get a patio door repair quote

Free quotes from independent local pros.

Glass, not hardware

A foggy thermos in a patio door

Fog between the panes means the thermos, the sealed glass unit, has lost its seal. In many doors it's replaced on its own, with a new unit made to order, which suits a door whose rollers and frame are sound. Our foggy thermos page sets defogging, a new thermos and a new door side by side.

Check with your borough first

Repair or replace: what the permit changes

In the City of Montréal, installing or replacing a sliding patio door always requires a permit, because of rules on lot-line distance, glazed façade, fire spread and exits. The page is silent on rollers and latches. RénoPlex, likewise, pays toward replacing a patio door, not repairing one.

When the frame is rotted or everything is failing, a new door is the honest answer: see patio door replacement, or browse all patio and glass doors.

Questions

Patio door repair questions

Explore your options

Independent pros repair patio doors across the island and on both shores, including West Island, Saint-Laurent, Laval and Brossard.

Send a short video of the door

Film it sliding and locking and say which floor it's on. We pass it to an independent pro who repairs patio doors, and they come back to you with a soumission.