To install acoustic slat panels, fix them to a sound, flat, dry substrate — either directly onto the wall or onto timber battens — with mechanical fixings into solid backing, butt-jointing panels so the slat spacing runs unbroken across the joins. Fixing onto battens adds an air gap behind the panel, which changes its low-frequency absorption, so a panel only delivers its published figure when built to the same mounting it was tested at. Note too that slat panels absorb sound within the room to reduce echo; they do not soundproof the wall or stop noise passing between rooms.
Start with the substrate
The wall behind the panels — the substrate — has to be sound, flat, dry and clean before anything goes up. Check for damp, fix any loose plaster, and confirm the surface is level enough that panels sit flat without rocking. On a stud wall, find and mark the studs; on masonry, plan fixings that reach solid material. A panel is only ever as secure as what it is fixed to.
Be clear about what you are installing. Acoustic slat panels absorb sound inside a room to cut echo and shorten reverberation — the mechanism explained in how acoustic panels work — but they do not soundproof the wall or stop noise travelling between rooms, which is a matter of mass and construction. Mounting panels on a partition will not turn it into a sound barrier.
Should you fix straight to the wall, or onto battens?
There are two common methods. Direct-fixing screws the panel straight onto the wall — quick, and it keeps the panel tight to the surface. Fixing onto battens first fastens vertical timber battens to the wall and then fixes the panels to those, which lets you level an uneven wall and route cables behind. The trade-off is acoustic: battens create an air gap behind the panel.
That air gap changes how the panel absorbs sound, most noticeably at low frequencies — an air cavity behind a porous absorber generally lifts low-frequency absorption compared with fixing hard to the wall. This is exactly why a tested αw or NRC figure is tied to a stated mounting under ISO 354: change the gap and you change the result. Build the mounting the panel was quoted against, or its published figure no longer applies.
Fixing the panels and keeping the slat rhythm continuous
Use mechanical fixings suited to the backing — wall plugs and screws into masonry, or screws driven into studs or battens — rather than adhesive alone, which struggles to hold a panel's weight over time and makes later removal awkward. Fix through the felt in the gaps between slats, or into the batten line, working to the fixing centres in the product's installation sheet so the panel is held flat from top to bottom.
When two panels meet, butt-joint them so the gap between the last slat of one and the first slat of the next matches the spacing across the rest of the panel. Getting that join right makes the slat rhythm read as continuous across the wall instead of showing an obvious seam. Trim any surplus felt at the edge so the panels sit tight without the backer bunching.
Cutting to length and working around sockets and openings
Measure and cut panels to length with a fine-tooth blade for a clean edge. Around sockets, switches, pipes and other openings, cut the slats to fit and trim the felt backer back to the opening with a sharp knife so face-plates and covers sit flush. Marking and cutting from the back is easier, because the felt shows the panel's layout most clearly there.
Bear in mind that every cut and cut-out removes a small area of slatted, felt-backed surface, so it slightly reduces the panel's absorptive area. On a single trim it is negligible; across a wall full of openings it adds up, so allow for it when you plan the panel area a room needs.
Internal and external corners
At an internal corner, run one panel into the corner and butt the next against its face, or scribe and mitre the meeting slats for a neater line. At an external corner, the panel edge and felt are exposed, so a mitred slat or a matching corner trim gives a clean finish and protects the edge. Plan corners before you start cutting, because they set out where full and part panels fall along each wall.
Follow the supplied installation detail
Batten sizes, fixing centres, the recommended air gap and corner treatments vary by product, so the reliable route is to build to the installation detail supplied with the specific panel rather than a generic method. That build-up is also the one the acoustic figure was measured against, so following it protects both the finished look and the absorption performance you were quoted.
Frequently asked questions
Do acoustic slat panels need battens, or can I fix them straight to the wall?
Both work. Direct-fixing is quick and keeps the panel tight to the wall; battens let you level an uneven wall and hide cables, but they add an air gap behind the panel. That air gap changes low-frequency absorption, so choose the mounting the panel was tested at — otherwise the published figure may not apply to your build-up.
Do slat panels on a wall soundproof the room?
No. Acoustic slat panels absorb sound within the room to reduce echo and reverberation; they do not block sound passing through the wall. Stopping noise travelling between rooms depends on the mass and construction of the wall, governed by different standards, not on absorptive panelling.
Can I glue acoustic slat panels instead of screwing them?
Adhesive is best treated as a supplement, not the main fixing. A panel's weight, plus timber's movement with temperature and humidity, can defeat adhesive over time, and glued panels are hard to remove or adjust. Use mechanical fixings into solid backing, following the product's installation sheet.
Does cutting a panel reduce its acoustic performance?
Slightly. Cutting to length or trimming around sockets removes some slatted, felt-backed surface, so the absorptive area drops a little. One or two cuts are negligible; across a wall full of openings it adds up, so allow for it when planning the panel area you need.