How To Install Bifold Doors
By WholesaleDoorHub Team · May 2026
Direct answer: Installing a bifold door takes 30–60 minutes per unit for an experienced installer. The critical steps are: install track, set pivot pin, hang door, install alignment bracket, and adjust.
Tools Required
| Tool | Purpose |
|---|---|
| Level (2-foot) | Level the track |
| Drill | Mount track and brackets |
| Tape measure | Set pivot pin location |
| Screwdriver | Adjust alignment bracket |
| Pliers | Install pivot pin |
Step-by-Step: Track, Pivot Pin & Alignment
Step 1: Install the Top Track
Mount the top track to the header or door casing. The track must be level — even 1/8" out of level will cause the door to drag or not close properly.
Track position: The track should be centered in the opening width. For a 48" opening, center the track at 24" from each side.
Step 2: Set the Bottom Pivot Pin
The bottom pivot pin is set in the floor or threshold at the hinge-side corner of the opening. Its position determines the door's alignment.
Pivot pin location: 1/2" from the hinge-side jamb, centered in the door thickness.
Step 3: Hang the Door
Insert the top pivot into the track at the hinge-side end. Lower the door and engage the bottom pivot pin. The door should hang plumb.
Step 4: Install the Alignment Bracket
The alignment bracket (also called the bottom guide) is installed at the latch side of the door, at the floor. It keeps the bottom of the door aligned with the opening when closed.
Step 5: Adjust
Check the door operation:
- Door should fold and unfold smoothly
- Door should close flush with the opening
- No binding or dragging
Adjust the top pivot height and the alignment bracket as needed.
Common Installation Mistakes
| Mistake | Result | Fix |
|---|---|---|
| Track not level | Door drags or won't close | Re-level track |
| Pivot pin off-center | Door misaligned | Reposition pivot pin |
| Alignment bracket too tight | Door binds | Loosen bracket |
| Alignment bracket too loose | Door swings out | Tighten bracket |
FAQ
Q: How long does it take to install bifold doors?
A: 30–60 minutes per unit for an experienced installer. A 4-unit closet package takes 2–3 hours.
Q: Can bifold doors be adjusted after installation?
A: Yes. The top pivot, bottom pivot pin, and alignment bracket are all adjustable. Most alignment issues can be corrected without removing the door.
Q: Do bifold doors need a floor guide?
A: Yes. The alignment bracket (floor guide) is essential for proper operation. Without it, the bottom of the door swings out when opened.
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