Acoustic wall panels of 2400 × 600 mm are the standard slat panel size, covering 1.44 m² each at about 21 mm thick. They suit ceilings up to about 2.4 m (8 ft). For taller walls, 2700 and 3000 mm lengths avoid horizontal joints. Plan quantities by wall width in 600 mm units, then add a 5 to 10% waste allowance.
Key takeaways
- 2400 × 600 mm is the standard; 2700 and 3000 mm lengths cover taller walls in one piece.
- Count panels by wall width (width ÷ 0.6 m, rounded up), not by wall area.
- Match panel length to ceiling height, leaving a small gap for a floor clearance and top trim.
- Doors and windows rarely reduce the panel count much, because the offcuts are short.
- Allow about 5% waste for simple walls and about 10% for complex ones, from the same batch.
Last reviewed: October 2026 by the Linegrain specification team.
What are the standard acoustic slat panel sizes?
2400 × 600 mm is the common standard format for acoustic slat panels. Linegrain’s standard panel is 2400 × 600 × about 21 mm: 12 mm MDF slats on a 9 mm PET felt backing. The slats are about 27 mm wide with gaps of about 13 mm, giving a slat-and-gap repeat of roughly 40 mm, so a 600 mm panel carries about 15 repeats. Longer panels in 2700 and 3000 mm lengths are available for taller walls.
| Panel size (mm) | Imperial (approx.) | Area per panel | Panels per 10 m² | Typical ceiling height |
|---|---|---|---|---|
| 2400 × 600 × 21 | 94.5 × 23.6 in (7 ft 10.5 in long) | 1.44 m² (15.5 ft²) | 6.9 | Up to about 2.4 m / 8 ft |
| 2700 × 600 × 21 | 106.3 × 23.6 in (8 ft 10.3 in long) | 1.62 m² (17.4 ft²) | 6.2 | About 2.45 to 2.7 m / 9 ft |
| 3000 × 600 × 21 | 118.1 × 23.6 in (9 ft 10.1 in long) | 1.80 m² (19.4 ft²) | 5.6 | About 2.75 to 3.0 m / 10 ft |
The 600 mm width is practical as well as conventional. It is manageable to carry and it relates to common framing: British Gypsum’s GypWall specification, for example, sets a maximum stud spacing of 600 mm. Panels mounted vertically cross several horizontal battens or studs regardless of where their edges land, so the width does not need to align with framing exactly.
Which panel length suits your ceiling height?
Ceiling height decides panel length. Building rules set minimums, not typical heights: in England the nationally described space standard requires a minimum floor-to-ceiling height of 2.3 m for at least 75% of a new dwelling’s gross internal area, and in the US the International Residential Code (section R305.1, as summarised by the City of Boise) requires habitable rooms to have a ceiling height of at least 7 ft (2134 mm). Real rooms vary widely above those minimums, so measure every wall.
| Measured ceiling height | Suggested panel | What happens |
|---|---|---|
| Under 2.4 m (e.g. 2.3 m) | 2400 mm | Cut each panel to length; plan the cut end at the top under a trim |
| 2.44 m (8 ft = 2438 mm) | 2400 mm | About 38 mm to share between a floor clearance and a top shadow gap or trim |
| 2.45 to 2.65 m | 2700 mm cut down, or 2400 mm plus a plinth or top band | Choose between a continuous slat line (cut 2700) and a design detail |
| 2.74 m (9 ft = 2743 mm) | 2700 mm | About 43 mm spare for clearances |
| 3.05 m (10 ft = 3048 mm) | 3000 mm | About 48 mm spare for clearances |
| Over 3.05 m | 3000 mm plus a planned joint, band or plinth | Design the joint as a feature line repeated across the wall |
When a 2400 mm panel is too short for the wall, avoid making up the difference with a small strip at the top. It looks like a mistake. A plinth or skirting zone, a horizontal band at a consistent height, or simply a longer panel cut to fit all look intentional. For double-height spaces, atriums and hotel lobbies, the extended-height 3000 mm acoustic slat panel reduces the number of joints.
How do you plan coverage for a wall?
Because slat panels are installed full height, the count is driven by wall width, not wall area:
- Measure the width of each wall to be covered, at floor and ceiling level.
- Divide by 0.6 m and round up. A 4.2 m wall takes 7 panels; a 4.3 m wall takes 8, with one cut to width.
- Choose the length from the ceiling height table above.
- Check the end pieces. Width cuts are easiest along a slat gap, in roughly 40 mm steps. Balance the cut pieces at both ends of the wall, or put a full panel at the most visible end.
- Note openings. Doors and windows only save a panel if the opening spans a full panel width and the offcuts are not needed elsewhere.
- Add a waste allowance (see below).
If you are planning for acoustic performance rather than a feature wall, start from the room’s reverberation target and work out how much absorption you need first; see how many acoustic panels do I need.
Why openings do not save as much as you expect
Take a standard internal door about 900 mm wide and 2.1 m high in a room with a 2.65 m ceiling. The door takes out one and a half panel widths, but you still need pieces about 0.5 m high above the door. Those pieces come from another panel cut to length, so the door reduces the full-panel count only slightly, if at all. Windows behave similarly, with pieces needed both above and below.
How much waste should you allow?
As a planning allowance, we suggest:
- About 5% for straight walls with few openings and a simple layout.
- About 10% for walls with several openings, sockets, angled ceilings or stair strings.
- More where real wood veneer must be grain-matched across a feature wall, or where curved and angled work is involved.
Order spare panels from the same production batch. A replacement panel made months later in a natural veneer may differ slightly in tone. For distributors and contractors, keeping a few spare panels per finish also covers transit damage and future repairs. Cutting technique, which affects waste, is covered in how to cut acoustic slat panels.
Worked example: a meeting room
This worked example uses a meeting room 5.4 × 4.2 m with a measured ceiling height of 2.65 m. The client wants one long wall fully covered, a centred band on the opposite wall, and the door wall covered.
| Wall | Size (W × H) | Panel length | Width ÷ 0.6 m | Panels | Notes |
|---|---|---|---|---|---|
| A: long feature wall | 5.4 × 2.65 m | 2700 mm cut to fit | 9.0 | 9 | Exact fit; cut each panel about 60 to 80 mm for clearances |
| B: centred band, opposite wall | 3.0 × 2.65 m | 2700 mm cut to fit | 5.0 | 5 | Panels centred on the wall; ends finished with end caps |
| C: short wall with door | 4.2 × 2.65 m | 2700 mm cut to fit | 7.0 | 7 | Door (0.9 × 2.1 m) saves almost nothing: over-door pieces come from one panel |
| Subtotal | 21 | 21 × 1.62 m² = 34.0 m² of panels | |||
| Waste allowance | +2 to 3 | About 10%, because of the door and socket cuts | |||
| Order | 23 to 24 | All from one batch |
The 2.65 m ceiling is the key decision. 2400 mm panels would leave a 250 mm gap at the top of every wall. 2700 mm panels cut to length give continuous slat lines from floor to ceiling, which is why they are specified here.
What about depth and handling?
A standard panel is about 21 mm deep when fixed directly to the wall. On battens, add the batten depth: on 25 mm battens, the finished face sits about 46 mm from the wall, which affects door linings, window reveals, socket boxes and skirting details. Plan those junctions before ordering trims.
Longer panels are also harder to handle. HSE’s manual handling guidance points out that the law sets no specific weight limits; the risk depends on the load, the task and the environment. A 3000 mm panel is long and flexible enough to need two people, especially on stairs, ladders and scaffold towers.
Ordering sizes in volume
For trade buyers, panel size also affects packing and freight. Linegrain’s MOQ for slat panels is 100 panels per finish (144 m² of 2400 × 600 panels), and mixed containers are allowed, so one shipment can combine 2400, 2700 and 3000 mm lengths and several finishes. Lead time is 20 to 30 days after sample approval, plus sea freight. See acoustic panel MOQ, lead time and shipping, or browse the full range of acoustic slat panels.
FAQ
What size are acoustic slat wall panels?
The most common size is 2400 x 600 mm (about 94.5 x 23.6 in), around 21 mm thick, covering 1.44 m2 per panel. Longer 2700 mm and 3000 mm panels are made for taller walls, so that rooms with higher ceilings can be covered without horizontal joints.
How many 2400 x 600 acoustic panels do I need for a wall?
Divide the wall width by 0.6 m and round up to get the number of full-height panels across the wall. Add a waste allowance of roughly 5% for simple walls and around 10% for walls with many openings or angled ceilings. If you are treating a room for reverberation rather than covering a wall, start from the acoustic target instead.
What if my ceiling is higher than 2.4 m?
Use 2700 mm panels for ceilings up to about 2.7 m (9 ft) and 3000 mm panels up to about 3.0 m (10 ft). Above that, plan a deliberate design: a skirting or plinth zone, a horizontal band, or a planned joint line that repeats across the wall.
Can 2400 x 600 slat panels be installed horizontally?
Yes. Horizontal slats suit low, wide walls, headboards and reception desks, and make a room feel wider. Fix them to vertical studs or battens, and plan the panel joints so they do not line up awkwardly with doors or windows.
Send us your wall widths and ceiling heights, and we will recommend panel lengths and quote the quantities, trims and spares for your project. Request a quote.