How to space board and batten evenly
- Decide on a target gap (12–24" looks right on most walls; narrow walls suit tighter spacing).
- Number of gaps = (wall width − batten width) ÷ (target gap + batten width), rounded to a whole number.
- Battens = gaps + 1 (one at each end).
- Exact gap = (wall width − battens × batten width) ÷ gaps.
gap = (W − n × b) ÷ (n − 1)
Cut a spacer block to the exact gap and use it between battens instead of measuring each one — small errors otherwise add up across the wall.
Batten count by wall width
8 ft ceiling, 1×4 battens, ~16" target gap, top rail:
| Wall width | Vertical battens | Exact gap | 8 ft boards |
|---|---|---|---|
| 8 ft | 6 | 15" | 8 |
| 10 ft | 7 | 15 15/16" | 9 |
| 12 ft | 8 | 16 9/16" | 10 |
| 14 ft | 9 | 17 1/16" | 11 |
| 16 ft | 11 | 15 3/8" | 14 |
Materials and tips
- Battens: 1×3 or 1×4 primed MDF or pine for interiors; ¼"–½" thick lattice strips for a flatter look.
- Fastening: construction adhesive plus 18-gauge brad nails into studs where possible.
- Outlets and switches: plan the layout so battens don't land on them, or use box extenders.
- Fill nail holes and seams, caulk every inside edge, then paint the wall and battens the same color.
FAQ
How far apart should board and batten be?
Usually 12–24 inches between battens. 16" is a safe default on 8 ft walls; go wider on tall walls and narrower on short or narrow walls.
Does board and batten go to the ceiling?
Full-height looks modern and makes ceilings feel taller; ⅔-height with a top ledge is a classic wainscot look. Set the wall height in the calculator to match.
What about exterior board and batten siding?
Exterior B&B uses wide boards with battens over the seams — use the siding calculator with 4×8 sheet siding for the area, and one batten per board seam.