What you need to do to replace a bifold door
Replacing a bifold door means removing the old door panels, hardware, and track, then installing new ones in the same opening. The job takes four to six hours for a single bifold unit and requires basic tools: a drill, screwdriver, level, tape measure, and a utility knife. You do not need to remove the door frame itself unless it is damaged. Most of the work is disconnecting the old hardware, sliding out the panels, and bolting the new track and pivot hardware into place.
The hardest part is usually getting the old pivot pins and brackets out cleanly without damaging the frame. If the frame is bent, cracked, or rotted, you will need to replace that too — which adds a full day and requires removing drywall or trim around the opening. For a standard bifold replacement in an existing frame, a homeowner with basic tool skills can do this alone.
Key Takeaways
- Measure your opening width, height, and depth before ordering a new bifold door, because the panels and track must fit the exact space.
- Remove the old door by unbolting the top track, taking out the pivot pins at top and bottom, and sliding the panels out as a unit.
- Install the new bottom pivot bracket first, then the top track, then hang the panels and adjust them so they close smoothly without binding.
- The entire job uses only a drill, level, and screwdriver — you do not need to cut or modify the frame if it is square and straight.
Measure the opening before you buy
Take three measurements: the width of the opening from inside edge to inside edge, the height from the floor to the top of the frame, and the depth of the frame (how far it sticks out from the wall). Write these down and bring them to the store or use them to order online. Bifold doors come in standard sizes — 24, 30, 36, and 48 inches wide — but the track length and panel configuration vary by manufacturer.
Check whether your opening is square by measuring the diagonals corner to corner. If the two diagonal measurements are the same, the frame is square. If they differ by more than a quarter inch, the frame is racked (twisted), and you may need to shim it straight before hanging the new door. Most home centers will cut the track to length if you ask, but verify this before you buy.
Remove the old door and hardware
Close the door and locate the top pivot bracket bolted to the inside of the top frame. Unbolt it with a wrench or socket. Then locate the bottom pivot pin — a metal rod sticking up from the floor or threshold — and unscrew the bracket holding it. Lift the entire door panel assembly straight up and out of the opening. Set it aside.
Next, unbolt the top track from the frame and remove it. The track is usually held by four to six bolts spaced along its length. Once the track is out, check the frame for damage. If the wood is soft, cracked, or water-damaged, you will need to replace the frame itself. If it is solid, clean out any debris and check it with a level in both directions. If it is out of level by more than a quarter inch, use shims to straighten it before installing the new track.
Install the new bottom pivot bracket and track
The bottom pivot bracket bolts to the floor or threshold at one end of the opening. Measure from the edge of the frame to find the exact spot — the manufacturer's instructions will specify the distance, usually 1 to 2 inches from the edge. Drill the bolt holes and bolt the bracket down. Make sure it is tight; a loose pivot will cause the door to bind and wear unevenly.
Lift the new top track into place and bolt it to the frame. Use a level to check that the track is perfectly level side to side. If it is not, the door will drift open or closed on its own. Tighten all bolts firmly. The track should not move when you push on it.
Hang the panels and install the top pivot
Slide the first panel into the track from the side, guiding the bottom pivot pin into the bracket you just installed. The panel should hang freely and not touch the floor. If it does, the bottom bracket is too high — unbolt it and move it down slightly. Once the first panel hangs straight, install the top pivot bracket on the inside of the top frame, directly above the bottom pivot. Bolt it down and insert the top pivot pin into the bracket.
Slide the second panel into the track next to the first. The two panels should meet in the middle with a small gap — usually a quarter inch — between them. If they bind or rub, the track is not level or the frame is racked. Check the level again and adjust shims under the track if needed. Once both panels hang straight and close smoothly, tighten all bolts a final time.
Adjust the door so it closes without binding
Close the door slowly and listen for rubbing or scraping. If the top of the door rubs the frame, the bottom pivot bracket is too far forward — loosen it and slide it back slightly. If the bottom rubs, the bracket is too far back — slide it forward. Make small adjustments, a quarter inch at a time, and test the door after each one.
Check that the door closes all the way and latches smoothly. The latch bolt should slide into the strike plate without resistance. If it does not, loosen the strike plate and move it up, down, or sideways until the bolt catches. Once the door closes and latches without binding, the job is done.
When to replace the frame instead of just the door
If the frame is cracked, rotted, severely bent, or more than a quarter inch out of square, replacing just the door will not fix the problem. A warped frame will cause the new door to bind and wear out quickly. In this case, you need to remove the old frame entirely, which means cutting away drywall or trim on both sides of the opening and unbolting the frame from the studs.
Installing a new frame is a larger job — it takes a full day and requires patching drywall afterward. If you are not comfortable with drywall work, hire a contractor for the frame replacement and do the door installation yourself. The frame usually costs $100 to $300, and labor to install it runs $400 to $800 depending on your area.
Tools and materials you will need
For the door itself: a bifold door kit that matches your opening size, which includes the panels, track, pivot brackets, and hardware. For installation: a drill with bits, a socket set or adjustable wrench, a level, a tape measure, a utility knife, and a screwdriver set. You may also need shims (thin wooden wedges) if the frame is slightly out of level, and caulk if there are gaps between the frame and wall.
Most bifold door kits cost $150 to $400 depending on the size and material — hollow-core panels are cheaper, solid wood is more durable. If you need to replace the frame as well, add $100 to $300 for the frame itself. Do not buy the cheapest kit; the pivot hardware wears out quickly on low-end doors, and you will be replacing it again in five years.
Frequently Asked Questions
Can I replace just one panel if the other one is still good?
Usually not. Bifold panels are sold as a matched pair, and the track and pivot hardware are sized for both together. If one panel is damaged, you can sometimes order a replacement panel from the manufacturer, but it costs nearly as much as a new door kit. If the damage is minor — a dent or scratch — consider refinishing or repainting the panel instead.
What if the opening is not a standard size?
Many manufacturers offer custom-cut track and can build panels to fit odd widths. This costs more — usually $300 to $600 — and takes two to three weeks to arrive. Measure carefully and call the manufacturer with your dimensions before ordering. Some home centers can also special-order non-standard sizes.
How do I know if the pivot hardware is worn out?
A worn pivot will cause the door to stick, drag, or close unevenly. If adjusting the bottom bracket does not fix the problem, the pivot pin or bracket is likely bent or the bearing is worn. You can replace just the pivot hardware without replacing the entire door — it costs $30 to $80 and takes an hour. Order the exact model number from the manufacturer to make sure you get the right part.
Do I need to remove the door to paint or stain it?
No. You can paint or stain the panels while they are hung. Close the door, tape off the track and hardware, and paint both sides. Let it dry fully before opening it. If you are staining, sand the panels lightly first and explore stain in the direction of the grain. Polyurethane or water-based topcoat will protect the finish.
What is the difference between a pivot hinge and a pivot bracket?
A pivot hinge is a single piece that combines the pin and bracket — it is simpler to install but harder to adjust. A pivot bracket holds a separate pin, which lets you fine-tune the door's position by moving the bracket slightly. Most modern bifold doors use separate brackets and pins because they are easier to adjust if the door binds.