Framing for a sliding door is unforgiving, and getting the numbers wrong means tearing out drywall you just hung. The pocket door rough opening size follows one simple rule: the width is roughly double the door’s width plus 1 inch, and the height runs about 84-3/8 inches for a standard 80-inch door. Nail those two figures and the frame kit, door, and hardware all drop in without a fight.
- How the Rough Opening Is Calculated
- Rough Opening Size Chart for Common Doors
- Wall Length: Don't Forget the Pocket Room
- Framing the Header and Studs
- Rough Opening Depth and Wall Thickness
- Common Framing Mistakes to Avoid
- Cost and What You Will Need
- Double Pocket Doors and Wider Openings
- Measuring Before You Cut
- Frequently Asked Questions
I have framed dozens of these on remodels and new builds. Below are the exact dimensions for every common door width, a table you can print, and the framing details that keep the door gliding for years instead of jamming after a season.
How the Rough Opening Is Calculated
A pocket door needs room for two things: the finished doorway you walk through, and a hidden cavity, the “pocket,” where the door slides out of sight. That is why the rough opening is so much wider than a swinging door of the same size.
The width formula that manufacturers like Johnson Hardware use is straightforward:
- Rough opening width = (2 × door width) + 1 inch. The doubling accounts for the door plus its pocket, and the extra inch covers the split jamb and clearances.
- Rough opening height = door height + 4-3/8 inches. For a standard 80-inch (6 ft 8 in) door, that lands at 84-3/8 inches. The extra height leaves room for the overhead track, the roller assembly, and floor clearance.
So a 30-inch door needs a rough opening about 61 inches wide (30 × 2 = 60, plus 1) and about 84-3/8 inches tall. Always confirm against the spec sheet for your specific frame kit, because a few brands vary by 1/8 to 1/4 inch, but this formula matches the industry standard.
Rough Opening Size Chart for Common Doors
Here are the numbers for the door widths you will actually buy at a home center. All heights assume a standard 80-inch tall door.
| Door Width | Door Height | Rough Opening Width | Rough Opening Height |
|---|---|---|---|
| 24 in | 80 in | 49 in | 84-3/8 in |
| 28 in | 80 in | 57 in | 84-3/8 in |
| 30 in | 80 in | 61 in | 84-3/8 in |
| 32 in | 80 in | 65 in | 84-3/8 in |
| 36 in | 80 in | 73 in | 84-3/8 in |
Read that width column as double-the-door-plus-one and the pattern is obvious: 24 gives 49, 28 gives 57, 30 gives 61, 32 gives 65, and 36 gives 73. Keep this chart handy when you order the frame kit and lumber.
Wall Length: Don’t Forget the Pocket Room
The rough opening handles the vertical framing, but you also need enough flat wall for the door to disappear into. As a rule, the wall on the pocket side must be at least as long as the rough opening width, measured from the strike jamb outward. For a 30-inch door with a 61-inch rough opening, you need roughly 61 inches of uninterrupted wall to swallow the door.
That length has to be clear of obstructions: no light switches, outlets, plumbing supply lines, or return-air ducts inside the pocket cavity. I have seen more than one framer forget that an electrician cannot run a box in that wall section. Plan the electrical around the pocket before you close it up.
Framing the Header and Studs
A pocket door assembly hangs from an overhead track, so the header carries the door’s weight plus anything above it in the wall.
Header Sizing
For a non-load-bearing partition wall, a header sized to the opening is usually enough, but the header must sit above the rough opening height so it does not interfere with the track. In a load-bearing wall, you need a properly engineered header, typically doubled 2x lumber or an LVL, sized to the span and load. When the wall is structural, confirm the header with your building code or an engineer before cutting.
Split Studs and the Pocket Cavity
The pocket itself is framed with split studs, thin steel-wrapped wood studs supplied in the frame kit, that let the door pass between the two wall surfaces. Do not substitute standard 2×4 studs inside the pocket; the door will hit them. Most kits give you the split-stud spacing, and you fasten drywall to them with short screws so the tips never poke into the pocket and scratch the door.
Rough Opening Depth and Wall Thickness
A pocket frame is built for a standard 2×4 wall, which finishes out at about 4-1/2 inches thick with 1/2-inch drywall on each side. If you are working with 2×6 walls, order a 2×6 pocket kit; do not try to shim a 2×4 kit into a deeper wall. Getting the wall thickness right up front keeps the split jambs flush with the drywall and the trim sitting flat.
Common Framing Mistakes to Avoid
- Framing the opening too tight. Build to the full rough opening size; a snug frame leaves no room to plumb and shim the track, and the door will drag.
- Running the pocket wall out of plumb. If the framing racks even a little, the door binds. Check the studs with a level on all faces.
- Putting utilities in the pocket. Keep wiring, plumbing, and ducts out of the entire pocket cavity.
- Using drywall screws that are too long. Long screws pierce the pocket and gouge the door face. Use the short screws or the length the kit specifies.
- Ignoring floor clearance. Leave the manufacturer’s gap at the bottom, typically around 1/2 inch, so the door clears finished flooring like tile or hardwood.
Cost and What You Will Need
A pocket door frame kit runs about $60 to $150 depending on width and brand, with heavy-duty kits for wider or heavier doors costing more. The slab door itself ranges from about $40 for a hollow-core to $200-plus for a solid-core or glass panel. Budget another $20 to $40 for the latch and pull hardware. If you hire it out, expect $500 to $1,000 in labor to frame and hang a pocket door in an existing wall, since the drywall has to come off.
On the tool side, keep a good level, a framing square, a tape measure, a circular saw, and a stud finder within reach. Dry-fit the frame kit before fastening anything permanently.
Double Pocket Doors and Wider Openings
Everything above assumes a single door sliding into one wall. For a double, or “converging,” pocket door where two panels meet in the middle and slide into opposite walls, the math changes. Each side needs its own pocket, so the total rough opening width equals the combined finished opening plus the two pockets. As a rough guide, budget the finished opening you want to walk through, then add a pocket depth equal to each door’s width on both sides.
For example, two 30-inch doors meeting in the center create a 60-inch finished passage, and you need roughly 61 inches of wall on each side for the pockets, so plan for a wall run well over 10 feet. Double pocket doors are a great look for closets and dining-room dividers, but confirm you have the continuous wall length before you commit, because there is no way to shorten a pocket after the fact.
Measuring Before You Cut
Measure the opening in three places across the width and three places up the height, then use the smallest reading as your working dimension. Framing is rarely perfectly square, and you want the door to clear at the tightest point. Check the floor across the full width with a level too; a sloped subfloor throws the track out of alignment and makes the door creep open or shut on its own.
Snap a level line for the top of the track before you set it. The single biggest determinant of a smooth-sliding pocket door is a dead-level track, so spend the extra few minutes here. A door that rolls to one end by itself almost always traces back to a track that was set out of level during rough-in.
Frequently Asked Questions
What is the rough opening for a 32-inch pocket door?
For a 32-inch wide, 80-inch tall door, frame a rough opening of 65 inches wide by 84-3/8 inches tall. That follows the double-the-width-plus-one rule (32 × 2 + 1 = 65).
Can I install a pocket door in a load-bearing wall?
Yes, but it is a bigger job. A load-bearing wall needs a properly engineered header to carry the load across the wider opening, which may mean temporary support and an LVL beam. Have the header sized by code or an engineer.
How much wall space does a pocket door need?
You need clear wall on the pocket side at least equal to the rough opening width, so about double the door width. A 30-inch door needs roughly 61 inches of open wall with no switches, outlets, or pipes inside it.
Get the pocket door rough opening size right, double the door width plus an inch across and 84-3/8 inches tall, keep the framing plumb, and keep the utilities out of the cavity, and the finished door will slide smoothly for the life of the wall.
