Bifold Door Not Closing or Dragging on the Track? Here's Why

A bifold door that catches, drags or refuses to line up at the final panel is nearly always down to the panels or the track moving out of alignment rather than the door itself being broken. In most cases it can be diagnosed with a fairly short list of checks before deciding whether it needs adjusting or repairing.

How a bifold door is built, and why alignment matters so much

A bifold set folds several panels together on a top track, with each panel hung from a roller or pivot at the top and often a guide at the bottom. Because the panels are linked, a small amount of movement in one hinge or roller throws off the alignment of the whole set, which is why bifolds tend to develop closing problems more visibly than a single hinged door.

This also means the fault is often not where the symptom shows up. A door dragging at the last panel near the lock might actually be caused by a roller issue two panels along, so it's worth checking the whole run rather than focusing only on the panel that won't close.

Rollers and the top track

The most common cause of a bifold dragging or catching is wear or dirt in the top track and rollers. Grit, sand and general debris collect in the track over time, especially on doors leading to a garden or patio, and this builds up resistance that stops the panels running smoothly.

Rollers themselves can also wear out or seize after years of use, which shows up as a panel that feels heavier to slide than the others, or one that sits slightly lower and catches on the floor.

• Vacuum the top track thoroughly, then wipe it out with a damp cloth
• Run the door through its full range slowly and feel for a rough or catching point
• Check whether one panel sits visibly lower than the others when the set is open

Adjustable hinges and pivots out of alignment

Most bifold doors have adjustable hinges built into each panel connection specifically so minor sagging can be corrected without replacing parts. Over time, particularly with heavy use or a slightly settling frame, these adjustments can drift and the panels stop meeting square at the final closing edge.

This is usually the cause when the door closes fine for most of its travel but the last panel needs a firm push, or won't quite meet the frame to let the lock engage. It's a job that can often be corrected by adjustment rather than replacement, but the adjustment points vary between manufacturers, so it's easy to make things worse by guessing.

The floor track and bottom guides

Bifold doors with a floor-level track are especially prone to picking up debris, and a track that's even slightly bent or lifted from repeated foot traffic will cause panels to bind. Some bifolds instead use a top-hung system with no floor track, in which case dragging is more likely to come from the top rollers or a panel that's slightly warped.

If the floor track has visible dents, has lifted from its fixings, or has debris packed hard into the channel, this is worth clearing and checking before assuming the fault lies with the panels themselves.

Weather, temperature and seasonal movement

Timber and, to a lesser extent, aluminium bifold frames can shift very slightly with temperature and humidity changes across the seasons. A door that closed perfectly all summer and suddenly starts catching in winter is often reacting to this kind of movement rather than a mechanical fault, and a small hinge adjustment usually corrects it.

When adjustment isn't enough

If a roller has genuinely worn out, a hinge has cracked, or a panel has warped, adjustment alone won't solve it and the worn part needs replacing. Continuing to force a door that's binding can accelerate wear on the track and hinges, so it's worth having it looked at properly rather than persisting with a hard push each time.

Getting it sorted

Our bifold door repairs service covers roller replacement, hinge adjustment and track repairs across Central London and the M25, and hinges and handles more generally if the fault turns out to be a worn fitting rather than the track. Get in touch through the quote page with a short video of the door catching, which usually helps us spot the fault before we even arrive, or call Mark on 07535 916982.

Call Mark on 07535 916982 or request a callback.