By Evan Christensen · Owner, The Barn Door Hardware Store
Published February 12, 2025 · Updated April 2026
Evan has owned and operated The Barn Door Hardware Store since 2016. Choosing between sliding, bypass, and bifold configurations is the first question he helps most customers answer — and it's almost always determined by the wall space available beside the opening, not by style preference. He and the team are available 7 days a week at info@thebarndoorhardwarestore.com.
The most common question we field from customers early in a barn door project is some version of "which type should I get?" The answer is almost always driven by the physical constraints of the opening — specifically, how much wall space is available beside it — rather than by aesthetic preference. Get that right first and the style decision is straightforward. Get it wrong and you end up with hardware that technically installs but doesn't work the way you expected.
This guide covers the three main barn door configurations — single track sliding, bypass, and bifold — with the specific situations each one is right for and the key constraints of each.
Single track sliding — the most common configuration
A single track sliding door runs on one track mounted above the opening and slides to one side — or both sides in a biparting setup with two doors. It's the most common barn door configuration and the simplest to install.
The key requirement: the full door width of clear wall space beside the opening on the slide side. A 36 in opening needs a 40 in door, which needs 40 in of unobstructed wall to slide fully open. If a light switch, outlet, window, or corner is in the door's path, the door can't fully clear the opening.
- Best for: Openings with adequate wall space on at least one side
- Doesn't work when: Wall space is limited or obstructed on both sides
- Alternative when wall space is limited: Bifold barn door hardware
- Alternative when no wall surface exists above the opening: Ceiling mount hardware
Single track sliding also provides better privacy than bypass configurations. With one door sitting 3/8 in off the wall, the gap between the door face and the wall surface is minimal. Bypass setups require at least one door to ride on an outer track, holding it significantly further from the wall — increasing the air gap around the door perimeter.
Browse our single track sliding hardware.
Bypass — for wide openings with limited side wall space
Bypass configurations use multiple doors that slide past each other on parallel or shared tracks, stacking in front of each other rather than beside the opening. The right solution when you need to cover a wide opening but don't have enough wall space on either side for the panels to stack completely clear.
Single bypass
Two to four doors on one shared track. Only two doors can bypass each other at a time — the doors telescope sequentially, which allows the system to fully clear an opening even with limited wall space on one side. The tradeoff: a center overlap is always present when the doors are closed, and the overlap amount depends on the roller style (6 in for standard rollers, 9 in for spoke wheel rollers). Single bypass doors also don't fully stack when open for the same reason — because the doors must overlap in the center when closed, they can never slide completely clear of each other. The accessible opening width is always reduced by the overlap amount.
- Best for: Wide openings where telescoping clearance is the priority
- Limitation: Center overlap — doors never sit flush when closed
Double bypass
Two to four doors on two parallel tracks. Doors stack completely in front of each other — the full opening can be cleared simultaneously. Both sides of a pass-through remain accessible at the same time, making double bypass the preferred choice for hallways, room dividers, and any opening that needs to function from both sides.
- Best for: Wide openings where full clearance and pass-through access are needed
- Advantage over single bypass: Full stacking — no permanent center overlap
Browse our double bypass barn door hardware and single bypass barn door hardware.
Bifold — when wall clearance beside the opening is limited
Bifold barn door hardware folds panels accordion-style along a wall-mounted track. The folded panels stack compactly beside the opening rather than sliding fully past it, which means bifold works in spaces where there isn't enough clear wall for a standard sliding door to travel.
Bifold comes in two configurations:
- One-way: All panels fold to one side. Works when clearance only exists on one side of the opening. Requires careful planning around symmetry — see our bifold barn door measuring guide for the formulas.
- Biparting: Panels fold to both sides from the center. The most common configuration for wide openings — gives a symmetrical look and fully clears the opening on both sides.
One tradeoff worth knowing: bifold panels project out from the wall as they fold open. The space saved beside the opening comes at the cost of the panels swinging out into the room during operation. In tight spaces this is usually acceptable, but it's worth confirming you have enough clearance in front of the opening for the panels to fold without obstruction.
Browse our bifold barn door hardware collection.
Quick comparison
| Single track sliding | Single bypass | Double bypass | Bifold | |
|---|---|---|---|---|
| Wall clearance needed | Full door width beside opening | Minimal — telescoping action | Minimal — doors stack in front | Minimal — panels fold compactly |
| Full clear opening | Yes | Yes — with correct track length | Yes | Yes |
| Pass-through access | One side at a time | One side at a time | Both sides simultaneously | One or both sides depending on config |
| Center overlap when closed | No | Yes — 6 in or 9 in | No | No |
| Soft close available | Yes | No | Yes | No |
| Ceiling mount option | Yes | No | No | No |
How to decide which configuration is right for your opening
Start with wall space, not aesthetics:
- If you have full door width of clear wall on at least one side: Single track sliding is the simplest and most common choice. Go here first.
- If wall space is limited on both sides but you need a wide opening covered: Bypass — single if telescoping clearance solves it, double if you need full stacking and pass-through access.
- If wall space beside the opening is genuinely limited and bypass depth isn't an option: Bifold. The panels fold compactly and require less lateral wall space than any sliding configuration.
- If there's no wall surface above the opening to mount into: Ceiling mount for single sliding doors. Note that ceiling mount is not compatible with bifold.
If none of these configurations fit your space, a traditional hinged door may genuinely be the right answer. Barn doors are a better solution than hinged doors in specific situations — particularly where swing clearance is limited — but they're not universally superior. The best door is the one that works for your opening.
Not sure which configuration fits your opening?
Email us at info@thebarndoorhardwarestore.com with your opening width and a description of the wall space beside it — how much is available on each side, and whether there are any obstructions. We can usually confirm the right configuration in one reply. Available 7 days a week.
