Worked layout
Vertical wood slats with equal end gaps
Example measurements
- Wall
- 120 × 96 in
- Actual slat face
- 1½ in
- Slats
- 48
Layout result
- Slat face
- 1.5 in
- Slats
- 48
- Clear gap
- ≈1 in
Compare on the same wall
Only the named layout setting changes. Wall measurements stay the same.
40 individual slats
≈1 7/16 in clear width / gap · 40 pieces on Wall A
Try this variation →48 individual slats
≈1 in clear width / gap · 48 pieces on Wall A
Try this variation →56 individual slats
≈5/8 in clear width / gap · 56 pieces on Wall A
Try this variation →Compare the repeated field with its open ends
Look at the open strip before the first slat and after the last. In this sample those end spaces follow the equal-gap treatment, so the pattern begins and ends on visible backing. Check how that looks beside the actual corner or casing rather than judging only the central repeat.
Now locate the wall’s focal object. A field centered on the wall may sit off-center behind a television or fireplace. Decide whether wall symmetry or alignment with that object matters more before changing the margins.
These are separate strips, not slats fixed to a manufactured backing panel. If you plan to buy panels, move to the product’s module dimensions and permitted cuts. A similar visible pattern does not make the two purchasing plans interchangeable.
Compare neighboring counts and edge modes
Keep the 1.5-inch face and wall dimensions fixed while comparing the lower and higher counts shown beside the sample. Read the resolved gap beside each drawing and look at how much backing it exposes. Let the actual finish and normal viewing distance inform your choice. Open a candidate to fine-tune its count in the calculator.
Then compare the sample’s open ends with full edge slats or custom margins. A full face at a boundary can change the visual frame, but it also needs room beside adjacent trim. Custom margins let you position the whole field deliberately around an offset focal point.
Use a small physical sample to judge the slat depth and shadows. A front elevation is useful for spacing, but it cannot show exactly how the side faces and backing will look in your room.
Replace the sample in measurement order
Replace the available wall width and height first, followed by the actual visible slat face. The product’s nominal size is not a substitute for that face measurement. Then set the count or target gap and choose the edge treatment.
Add measured door and window boundaries using the same wall reference. Inspect the surviving pieces above and below an opening as parts of the same vertical line. Check the narrow side spaces as well: a count that looks regular on an empty wall can meet casing awkwardly.
If that happens, compare a neighboring whole-wall count with the opening held in place. Any omitted fragment should represent a deliberate break in the design. Keep the actual opening measurements intact while considering the alternatives.
Check full-height stock and the physical mockup
Each uninterrupted vertical member needs stock long enough for the finished piece plus the required cutting allowances. Check usable length after kerf and end trim, rather than assuming that a nominal board length matching the wall height will work.
Keep profiles and finishes identifiable when considering offcuts or existing material. A long enough strip may still have an unsuitable face, depth or exposed end. Review spare pieces separately so the visible slat count is not mistaken for the final purchase quantity.
Armstrong’s WoodWorks Grille guide covers a manufactured system’s mounting, panel joints and opening details. Its tested assembly does not establish acoustic performance for the loose strips shown here. Use your own slat-and-backing sample to confirm appearance, then mark the first, middle and last positions from the same wall reference.
Questions about this layout
Why start with 48 slats?
It provides a concrete density to compare on the sample’s 10-foot wall with 1.5-inch faces. Change the count and judge the recalculated gaps; the example is not a universal recommendation.
Can I put a slat against each wall edge instead?
Compare the full-edge-slat treatment in the calculator. It changes the boundary condition and the resolved internal spacing, so use the new positions rather than moving only the first and last sample slats.
Will this tell me how many acoustic panels to buy?
This sample counts loose slats. For manufactured panels, use the actual module dimensions, permitted edge cuts and pack quantity. Appearance alone does not establish acoustic performance or panel coverage.
Sources and assumptions
- Armstrong: WoodWorks Grille – Classics Installation GuideSections 4.5 and 5 describe this manufactured grille system’s wall mounting, panel joints, and cut openings. They do not establish the performance of a homemade slat wall.
- TrimLayout Calculation MethodsDefinitions of clear gaps, measurement references, finished pieces, and material allowances used in these examples.
- NIST: SI Units — LengthUnit relationships for converting measured lengths; this source does not prescribe decorative proportions.