Bifold Door Stuck Or Won't Close

What's happening?

Bifold doors are heavy panels running on a track and held by pivots, and small movements show up as rubbing, tightness or uneven gaps. DoorsDirect2U says debris is the commonest cause of sticking and dragging, and sets out an order of work: confirm the frame is true with a spirit level, set the panel height with the bottom pin and pivot bracket, square the leaf by toe and heel to deal with glass weight or timber movement, then align the lock and keeps. It adds that external bifold doors can need extra care, because weather and temperature changes exaggerate movement, so seasonal tightness and doors that close inconsistently are typical outside, and the adjustments are worth rechecking with the seasons.

What usually causes it?

• Debris, grit and old grease in the track
• A panel that has dropped, so it rubs the floor or track
• A frame that is out of level or square
• Toe and heel set wrongly, so a heavy glazed leaf sags
• Lock and keeps out of line, so the lead door will not close and seal
• Weather and temperature changes moving timber or the frame on an external set

Is it dangerous?

No. Do not force a stuck panel: bifold glass is heavy. A bifold that will not lock is a security weakness.

Can I fix it myself?

Vacuum the bottom track and brush out the corners and the pivot area, wipe both tracks with warm soapy water and dry them, then use a light silicone spray on the moving parts, not oil, which attracts dust. If the door is still tight, check the frame with a spirit level before touching adjusters, and adjust in small amounts, checking the gaps each time. Not every set has accessible adjustment, so follow the maker's instructions.

When should you call a window fitter?

Call a window and door fitter if the frame is out of true, if a panel keeps dropping, if the track or rollers are damaged, or if the door will not lock after adjustment.

What will the window fitter actually do?

• Check the frame for level and square and the track for damage
• Set the panel height at the bottom pin and pivot bracket
• Adjust toe and heel on glazed leaves
• Align the lead door, lock and keeps so it closes and seals
• Replace worn rollers, pins or seals

Who fixes this

• Bifold and patio doors
• Window repair and adjustment

Questions people ask

Sources & References

1. DoorsDirect2U: how to adjust bifold doors
2. DoorsDirect2U: common sliding patio door problems