Installing Accordion Doors: Step-by-Step for Interior Openings

An accordion door folds into a tight stack against the jamb, which makes it a smart fix for closets, pantries, laundry nooks and room dividers where a swinging door has nowhere to go. The catch is that it hangs entirely from one overhead track, so a crooked or loose header is the number one reason these doors bind, drift open or pull out of the ceiling. Installing accordion doors is a manageable afternoon project for most homeowners, and getting the measurements and track right makes up most of the job.

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The short version: measure the opening at several points, cut the track to the narrowest width, fasten it securely into the header, hang the folding panel on its rollers, attach the stationary edge to the jamb and fit the latch. Trimming the panel width or length is sometimes needed, and most kits are designed for it.

Before Installing Accordion Doors: Choose the Right Type

Accordion doors interior kits come in a few main styles, and the choice affects the install:

• Vinyl or PVC accordion folding doors: lightweight slats joined by flexible hinges. Budget-friendly, easy to trim, good for closets and laundry areas, and tolerant of humidity.
• Wood accordion doors: solid or veneered wood slats connected by hinges or fabric strips. Heavier, warmer looking and more substantial, but they need a stronger header.
• Fabric-covered or louvered panels: some have a decorative fabric face or louvers for ventilation.
• Premium multi-panel systems: high quality accordion doors with thicker panels, ball-bearing rollers and sound-dampening seals used as room dividers.

Exterior accordion doors are a different product entirely: heavy glass folding walls with weather seals, sill tracks and structural headers. They are almost always a contractor install. Everything that follows here covers interior openings.

High end accordion doors often use a bottom guide or floor track for stability on wide spans. Lighter interior doors usually hang from the top only, leaving the floor clear, which matters if the opening crosses a flooring transition.

Tools and Materials

• Tape measure, pencil and a 4-foot level
• Drill/driver with bits sized for the kit’s screws
• Stud finder
• Fine-tooth hacksaw for cutting the metal or vinyl track
• Utility knife and straightedge for trimming vinyl panels
• Circular saw or table saw with fine blade for wood panels, if trimming
• Shims and wood filler
• Safety glasses and a stepladder
• The door kit: track, rollers or carriers, panel, latch, jamb strip and screws

Measuring the Opening

Accurate measurements prevent nearly every problem. Measure width at the top, middle and bottom of the opening, from finished jamb to finished jamb, and record the smallest number. Measure height on the left, center and right, from the top of the finished floor or carpet to the underside of the header, and again record the smallest number.

Most kits fit a range, such as 32 to 36 inches wide and 80 inches high. Choose a kit whose range covers your smallest width and height. If the opening is wider than one kit, many systems allow pairing two doors that meet in the middle with a latch.

Check whether the opening is square. Hold a level against each jamb and across the header. A header that slopes more than about 1/4 inch over the width will make the door drift toward the low side; plan to shim the track level.

Stack space

When folded open, the door stacks against one jamb and eats some of the opening. Panel stacks commonly run 4 to 8 inches deep and wide, depending on slat width and panel count. Confirm the stack will not block a light switch, shelf or closet rod.

Step-by-Step Installation

1. Remove old hardware. Take down any old bifold or curtain hardware. Fill old screw holes and make sure the header surface is flat.
2. Cut the track. Cut the header track to the measured opening width minus any allowance the instructions specify, usually about 1/8 inch. Use a fine-tooth hacksaw and file the cut end smooth so rollers glide past it.
3. Mark and pre-drill. Center the track on the header, either flush to the front or set back as the kit directs. Mark screw holes and pre-drill into the wood header framing. Use a stud finder to confirm there is solid wood above the drywall.
4. Level and fasten the track. Place shims behind the track where needed, check with a level, then drive screws snugly. Do not rely on drywall anchors alone for anything but the lightest vinyl doors; the track carries the full door weight and the pull of daily use.
5. Prepare the panel. Unfold the door on the floor. Insert rollers or carriers into the top of the panel if they are not pre-installed. Check that the panel height leaves the specified gap at the floor, usually about 1/2 inch above finished flooring or carpet.
6. Hang the door. Slide the rollers into the open end of the track, or snap them in according to the kit design. Push the folded panel along the track to the stack side.
7. Attach the fixed edge. Fasten the stationary end of the panel, or its jamb strip, to the jamb on the stack side with the supplied screws. Keep it plumb with a level.
8. Install end stops. Insert the track end cap or stop so the panel cannot roll out of the track.
9. Fit the latch. Close the door fully. Mark the strike or magnetic catch position on the opposite jamb, pre-drill and install it. Install the handle or pull on the lead post.
10. Test and adjust. Open and close the door several times. Adjust roller height, latch position or shims until it glides easily and latches without force.

Trimming Panels to Fit

Width

Most vinyl and PVC accordion folding door panels are narrowed by removing whole slats. Pry out the hinge strip or slide the connector free, remove one or more slats, and reconnect the remaining panel. Remove slats from the stack side, not the lead side, so the latch post stays intact. Wood panels may require detaching a slat and its hinge hardware, following the kit directions.

Height

If the door is too long, trim the bottom. For vinyl, score both sides with a sharp utility knife along a straightedge, then snap or cut through. For wood, tape the cut line with painter’s tape to reduce splintering and cut with a fine-tooth blade, then sand and seal the raw edge. Measure twice; you cannot add height back. Some systems instead let you lower the track slightly or use a taller filler block above the track to take up extra space when the door is too short.

Finishing Touches

Cover the top of the track with trim or a header valance if it is visible and you want a cleaner look. Caulk and paint gaps between trim and jamb. For a pantry or utility closet, add felt pads or bumpers where the stacked panel hits the jamb to quiet it.

Where an accordion door divides two rooms with different heating or noise levels, choose a model with seals along the lead edge and a brush or sweep at the bottom. It will not seal like a solid door, but it helps.

Troubleshooting Common Problems

• Door drifts open or closed by itself: the track is not level. Loosen screws, shim the low end and refasten.
• Binding or sticking: check for burrs at track cut ends, debris in the track or rollers that have popped out. Clean the track and apply a dry silicone lubricant, not grease.
• Panel drags on carpet: raise the rollers if adjustable, or trim the bottom edge.
• Latch will not catch: move the strike plate slightly and check that the lead post hangs plumb.
• Track pulling out of the ceiling: screws were only in drywall. Remove the door, add blocking or longer screws into framing and reinstall.
• Slats separating: replace damaged hinge strips or connectors; many makers sell spare parts.

Cost and When to Hire a Pro

General ranges: basic vinyl accordion closet kits are among the least expensive door options available. Wood and premium room-divider systems cost several times more. A handyman typically charges a modest amount for a standard closet install, more for wide openings, double doors or custom trim.

Call a carpenter if the opening needs a new header, the framing is out of square by more than shims can fix, the door is unusually wide or heavy, or you are converting a wall to a folding partition. Removing or cutting framing in a wall can affect structure, so that work needs a pro and possibly a permit. If you are opening a wall that contains wiring or plumbing, bring in the appropriate licensed trade.

A carefully leveled track, a properly sized panel and a well-placed latch are what separate a smooth folding door from one that sticks and sags. Done right, installing accordion doors gives you a space-saving closure that will glide easily for years.