Room layouts with separate wall references

Multi-Wall Board and Batten Calculator

Add the walls of a room, compare their batten spacing, and keep each window and cut piece attached to the wall it belongs to.

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Add another finish layer

Use this when installing both finishes together on these walls. Each layer has its own selected plan and contributes pieces to the project.

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Measure your wall

Wall width

From the measured left edge to the right edge.

Actual batten width

Measure the visible face, not the nominal lumber size.

Plan by

Number of vertical battens

pcs

Wall edges

Opening layout

Batten length

Optional for spacing. Finished length excludes rails and baseboards.

Wall height & context

Batten bottom from wall datum

Defaults to the wall bottom. Set this to the top of a baseboard when battens start above it.

Measured wall height

The whole measured wall, separate from batten length.

Board & Batten · Plan A · Selected

See your wall, measured to fit.

Enter the wall measurements and the layout settings for this style. Your plan will appear here as you work.

Finished pieces

Complete the measurements to see the finished pieces.

Materials & stock

Only selected plans enter the shopping list. Different profiles keep separate stock, even when their dimensions match.

Project reserve

Project stock estimate

Updating the selected project’s materials…

Shared and existing physical pieces

Sharing requires the same surface, material, geometry and end cuts. Equal lengths alone do not combine pieces. Confirm that the two roles describe one physical component.

No additional matching pairs in the selected plans. Assign matching profiles and confirm a shared floor datum where appropriate.

Coordinate the room without combining wall widths

Name each wall and measure its full intended span. Choose the batten face and edge treatment, then compare candidate counts for each wall. Different widths may require different counts to keep the gaps visually close.

Review the actual gap on the long wall and short return together. A shared target does not guarantee identical gaps while preserving whole battens and both boundaries. Choose the per-wall counts deliberately; one room perimeter cannot describe the individual wall layouts.

Worked layout

Board and batten around a window

Use my measurements

The window wall keeps one continuous seven-batten grid above and below the outside trim. The return wall has its own six-batten layout and its own left-edge zero; corner members are separate pieces.

Example measurements

Window wall: 120 × 96 in
Window outside trim: 36 × 42 in
Left / bottom position: 42 / 30 in
Return wall: 96 × 96 in
Actual batten face: 2½ in
Window / return wall battens: 7 / 6

Layout result

Window: 36 × 42 in
Installed pieces: 14
Exact material: 100 ft 6 in

Apply the spacing relationship on each wall

Each wall uses its own width W, selected whole count N, and measured batten face B. Compare the resulting clear gaps before deciding whether the room’s rhythm works. When the profiles differ, evaluate their actual faces as well as their gaps.

Battens on both edges

G = (W − N × B) ÷ (N − 1)

Equal end gaps

G = (W − N × B) ÷ (N + 1)

Give each opening a wall and a finished boundary

Record each wall’s own lower-left zero. For a window or door, measure left and bottom offsets, width, and height of the finished boundary the battens must avoid. Keep the casing footprint distinct from the rough opening and jamb.

For continuous alignment, keep the full-wall positions and inspect the pieces above and below the opening. If the two sides should center independently, define their measured sections as separate compositions. Inspect narrow spaces beside casing before concentrating only on short vertical fragments.

Keep corners and material roles explicit

An adjacent wall does not automatically share a corner batten or one continuous tape coordinate. Label each wall-end piece and resolve the physical corner detail before counting one piece as shared. Check trim projections and out-of-plumb corners where the two wall layouts meet.

Group compatible material by actual profile, then enter stock length, kerf, end trim, and spares. Keep existing pieces out of new purchasing and check the longest required piece. A combined room total is useful only when the individual pieces and joints remain traceable.