How to Install Double Barn Doors: Choose Your System First, Then Follow the Steps

Installing double barn doors is a straightforward DIY project when the right hardware system is selected before any drilling starts when installing double barn doors. The two most common double barn door configurations, bi-parting and bypass, use different hardware, different track lengths, and different installation sequences. Getting this double barn door decision right upfront prevents the most common and most expensive double barn door installation mistake: buying hardware that does not suit the space.

To install double barn doors, first determine whether the space requires a bi-parting system (two doors sliding apart to opposite sides) or a bypass system (two doors on offset tracks that overlap). Install a header board into wall studs, mount the track level above the opening, attach hangers to each door, hang both doors using two people, and finish with floor guides and stoppers. The full project takes 3 to 5 hours.

Bi-Parting vs Bypass: Choose the Right System for Double Barn Doors Before Buying Hardware

The terms double barn doors and bypass double barn doors are used interchangeably online, which causes homeowners to purchase the wrong hardware for their space. The two systems for installing double barn doors are fundamentally different and suit different situations. Installing double barn doors correctly starts with making this choice before ordering anything.

Bi-parting double barn doors are the right choice when equal wall space exists on both sides of the opening and the primary goal is maximum access. Bypass double barn doors solve the limited wall space problem by allowing one panel to slide in front of the other. If wall space on one side is less than one door panel width, bypass is the only viable system for installing double barn doors in that location.

See more: How to Build Swinging Barn Doors: Materials, Hardware, and Step-by-Step Instructions

Before You Start: Pre-Install Checklist

Running through six checks before installing double barn doors or drilling any holes any holes prevents mid-project surprises. Double barn door installations fail most often because one of these items was overlooked before the project started.

Six-Point Pre-Install Check

Wall space and stud location are the two checks that most affect the project before it begins. Clearance and door weight affect hardware selection. Thickness and obstructions affect installation feasibility. Address all six before purchasing any double barn door hardware kit.

Verify Hardware Weight Rating

Every double barn door hardware kit is rated for a maximum door weight per panel, typically 80 to 200 pounds for residential kits. Hanging a door that exceeds the hardware rating causes premature roller wear, track deflection, and eventual door drop. Estimate door panel weight before purchasing:

• Solid pine panel (36x84 in, 1.375 in thick): approximately 40 to 50 pounds.

• Hollow-core panel (same dimensions): approximately 25 to 30 pounds.

• Solid hardwood panel (oak or similar): can exceed 80 pounds.

Confirm that the hardware kit is rated for the actual door weight per panel before purchasing. For heavy doors, specify a heavy-duty hardware kit rated for 150 pounds or more per panel.

Measuring for Double Barn Doors

Three measurements determine the correct track length and door panel dimensions for installing double barn doors: the opening width, the available wall space on each side, and the vertical clearance above the door casing. Getting these right before ordering prevents the most common measuring mistake in double barn door installation, which is, which is ordering a track that is too short to allow both panels to fully clear the opening.

Track Length and Panel Width by Opening Size

Add 1 to 2 inches to each panel width beyond the opening edge for overlap coverage. Bi-parting systems need a track exactly twice the opening width so each panel can fully clear the opening on its respective side. Bypass track length is shorter because one panel slides in front of the other rather than fully to one side.

Height and Clearance

Measure the height of the opening from floor to the top of the door casing. The door panel height should cover the opening plus 1 to 2 inches of overlap at the top. Measure from the top of the casing to the ceiling or soffit to confirm at least 6 inches of vertical clearance for the track and rollers. For spaces with less than 6 inches of clearance, specify a low-profile hardware kit before ordering. Also confirm that the door panel will not drag on carpet or rugs at the bottom, leaving a gap of at least 1/2 inch between the panel bottom and the finished floor.

Browse double barn door hardware at Doors and Beyond, including bi-parting and bypass systems: Browse Barn Door Hardware at Doors and Beyond

How to Install Double Barn Doors: Step by Step

The double barn door installation sequence for hanging double barn doors follows six steps that apply to both bi-parting and bypass systems, with notes where the two systems require different actions. The total project takes 3 to 5 hours for a standard double barn door installation with two people.

The header board and track leveling steps are the two phases where most installation errors occur and the hardest to correct after the doors are hung. Spending extra time on these two steps pays off in smooth operation for the life of the installation.

Step 1: Install the Header Board

If the studs above the opening are not spaced to mount the track directly, install a horizontal header board first. Cut a piece of 1x4 or 1x6 lumber to the length of the track. Prime and paint it to match the wall before mounting. Locate the studs above the door opening using a stud finder and mark their centers. 

Hold the header board at the correct height above the door casing (typically 2 inches above the top of the casing, but verify against the hardware kit instructions) and confirm it is perfectly level using a level or laser level. Drive 3-inch lag screws through the board into each stud. The header board must be fully level before any track holes are drilled.

Step 2: Mount the Track

Hold the track against the header board with a helper keeping one end in position while the first mounting point is marked. Drill pilot holes with a 1/8-inch bit at each marked location. Insert any spacers behind the track as required by the hardware kit, which create clearance between the door face and the wall. 

Drive the track bolts through the pilot holes using a socket wrench. Check level after every two bolts are tightened. A track that is even slightly out of level causes both double barn door panels to drift toward the low end when released. For bypass double barn door systems, attach the bypass brackets at this stage following the manufacturer's bracket placement template before moving to the next step.

Step 3: Attach Hangers to the Doors

Lay each door face-down on a padded surface to avoid scratching the finish. Center the hanger hardware on the top edge of the door at the positions specified in the hardware kit template. Mark the bolt hole locations and drill a 1/8-inch pilot hole at the top bolt position, then widen with a 7/16-inch bit. Slide the bolt through the hole and mount the rolling hardware. For bypass double barn door systems, the front door uses standard hangers and the rear door uses offset hangers that allow it to travel on the inner track. Confirm that the correct hanger type is on each door before proceeding to hanging.

Step 4: Hang Both Doors (Two People Required)

Hanging heavy double barn door panels during double barn door installation is a two-person task without exception. One person guides the door from below while the other positions the rollers onto the track. For bi-parting double barn doors, hang the door that travels to the right first and slide it to the far right of the track. Then hang the door traveling to the left and slide it to the far left. 

For bypass double barn door systems, hang the rear door on the inner track first, then hang the front door on the outer track. Once both panels are on the track, check that each hangs level by looking at the gap between the bottom of each door and the floor. If one side of a panel hangs lower than the other, adjust the hanger height at the low side using the adjustment screw on the hanger hardware.

Step 5: Install Floor Guides and Anti-Jump Pads

Floor guides prevent the bottom of each door panel from swinging away from the wall during use. Two placement options exist for installing double barn doors. Floor-mounted guides attach to the subfloor below the opening and hold the door stable at both sides. Wall-mounted baseboard guides attach to the wall trim without drilling into the floor and are a practical alternative when drilling into tile, hardwood, or carpet is not desirable. 

Anti-jump pads or plates attach just below the track at each end and prevent the rollers from leaving the track if a door is moved quickly or bumped. Install anti-jump pads before hanging the doors if the hardware kit includes them, as they are more difficult to fit after the doors are on the track.

Step 6: Add Stoppers and Test

Door stoppers mount to the track at the point where each panel should stop when fully open. Position each stopper approximately 1 inch from the respective end of the track to prevent the panel from contacting the wall bracket at full extension. With stoppers in place, slide both doors back and forth several times. 

Watch for three signs of double barn door installation issues; each is correctable: both doors drifting to the same side when released (track not level); any sticking or bumping at a specific point along the track (roller alignment issue or debris); and bypass door handles contacting each other during operation (requires low-profile handles on one or both panels).

See more: Changing French Doors to Sliding Doors: Costs, Feasibility and What to Expect

Common Installation Problems and How to Fix Them

Three problems account for most post-installation issues when hanging double barn doors in residential settings, and all three are correctable without disassembling the full system.

Doors Drifting to One Side

When both panels drift toward the same side when released, the track is not perfectly level. Loosen the track bolts slightly, insert shims behind the low end of the track to raise it to level, and re-drive the bolts. Re-test after each adjustment. A laser level is more reliable than a bubble level for this correction because it eliminates parallax error when viewed at an angle along the length of the track.

Doors Not Covering the Opening Fully

If one or both double barn door panels leave a gap at the edge of the opening when fully closed, either the door panels are too narrow or the track is positioned too far to one side. 

If the panels are the correct width, adjust the door stopper position to allow the panel to travel further before stopping. 

If the panels are genuinely too narrow, adding an astragal strip on a bi-parting system or a trim strip along the panel edge can close a gap of up to 2 inches without replacing the panels.

Bypass Handles Colliding

On bypass double barn door systems, the door handles of the front and rear panels can contact each other when one slides in front of the other. This is most common with standard D-pull or straight bar handles that project outward from the door face. 

The solution is to replace one or both handles with low-profile recessed cup pulls or ring pulls that sit flush with the door surface. Most bypass barn door hardware manufacturers offer compatible low-profile handle options designed specifically for this situation.

See more: Pros and Cons of French Doors: An Honest Assessment for Homeowners Considering the Investment

Final Thoughts

Installing double barn doors takes 3 to 5 hours and is an achievable double barn door project for any homeowner comfortable with basic tools. The decision between bi-parting and bypass for double barn doors determines the hardware to buy, the track length to order, and the installation sequence to follow. Getting that choice right before purchasing anything is the single most important step that prevents the most common and most costly double barn door installation mistakes.

Ready to install? Browse double barn door hardware and sliding barn door collections at Doors and Beyond: Browse Barn Door Collections at Doors and Beyond