First: think about the day you remove them
Many people stick acoustic panels with whatever's at hand: double-sided tape, hot silicone, contact glue. Three months later, when they need to move or remove one, they discover it takes the paint, the plaster, or chunks of the panel with it.
Proper installation isn't just "make it stay up": it's that they last for years, perform acoustically at their maximum, and that when you remove them you don't destroy anything. Let's go in order.
The five viable methods
1. Reversible mounting adhesive (recommended for rentals)
- Product: high-density double-sided foam tape (3M VHB, Tesa Powerbond, similar)
- Cost: €5-10 per roll
- Reversibility: high — pulling perpendicular to the wall releases without tearing
- Holds: panels up to 2 kg / m²
- Setting time: effective from the first moment, full strength after 24 h
Ideal for lightweight acoustic foam panels.
2. Acrylic mounting adhesive (recommended for owned homes)
- Product: acrylic mounting adhesive (No More Nails, Pattex Nural, Soudal Fix-All)
- Cost: €4-7 per tube
- Reversibility: medium-low — removable but leaves residue
- Holds: panels of any reasonable weight
- Setting time: 24-48 h for full strength
Apply in beads on the back of the panel (not a continuous surface), 4-6 evenly distributed points.
3. Mechanical mount with screws (recommended for heavy panels)
- Product: anchors + screws + aluminium mount or Z-hooks
- Cost: €2-4 per panel
- Reversibility: high — only the anchor hole remains
- Holds: any weight
- Installation time: 15-20 min per panel
Essential for dense mineral wool panels or panels with wooden frames over 5 kg.
4. Industrial adhesive velcro (recommended for rearranging)
- Product: industrial-grade self-adhesive velcro (3M Dual Lock)
- Cost: €12-20 per metre
- Reversibility: total — the panel separates, velcros stay
- Holds: panels up to 5 kg
- Allows repositioning the panel at any time
Useful if you plan to move panels according to room use.
5. Perimeter frame fixed to wall (recommended for pro finish)
- Construction of wooden battens fixed to the wall with screws forming a frame, onto which the panel is screwed
- Cost: €8-15 per panel in materials
- Reversibility: medium — frame screws remain
- Enables separation from the wall → improves bass absorption
It's the system used in professional studios. The air gap between panel and wall increases mid-low absorption by 20-40%.
The important question: air gap or direct mount?
A porous panel glued directly to the wall absorbs from a minimum frequency that depends on its thickness. If you separate it from the wall (creating an air gap), the minimum absorption frequency drops considerably.
| Configuration | Minimum useful frequency | |---|---| | 50 mm panel mounted on wall | ≈ 500 Hz | | 50 mm panel + 50 mm gap | ≈ 250 Hz | | 50 mm panel + 100 mm gap | ≈ 180 Hz | | 100 mm panel mounted | ≈ 250 Hz | | 100 mm panel + 100 mm gap | ≈ 120 Hz |
Conclusion: if your goal is to also control mid-low frequencies (200-500 Hz), separate the panels 5-10 cm from the wall using battens, spacer anchors or Z-hooks. It costs the same and you get double the performance in the critical band.
Step-by-step process (adhesive + air gap)
Materials needed
- Panels
- 5 × 2.5 cm wooden battens (pine, IKEA or any hardware store)
- Wall screws + anchors
- Drill
- Spirit level
- Pencil and tape measure
- Masking tape
- Acrylic mounting adhesive
Steps
- Mark the position of each panel on the wall with pencil and level. Use the mirror method to identify first reflection points
- Cut battens to panel size: 4 pieces forming an internal frame
- Screw battens to the wall with anchors. Verify level
- Apply adhesive to the battens (not the panel)
- Place the panel on the battens and press firmly
- Use masking tape to hold while it cures (24 h)
- Remove the tape and check adhesion
Total time per panel: 30-40 min. Result: 2.5 cm separation from wall, 15-20% improvement in mid-low absorption, fixing that lasts for years without moving.
Common mistakes that destroy walls
- Hot silicone applied directly → rips paint and leaves lumps when removed
- Thin double-sided tape (the cheap stationery kind) → doesn't hold weight, falls off after 2-3 months tearing pieces of wall
- Contact glue on the full surface → impossible to remove without destruction
- Direct screws into the panel without a washer → punch through the material and deform the panel
- Mixing fresh paint with adhesive → paint hasn't fully cured (minimum 30 days) and removing drags paint off
Special case: drywall
If the wall is drywall (most common in modern flats), avoid direct screws into drywall without an expanding metal anchor. A 2 kg panel will rip the drywall off within a few months if you use only a plastic anchor.
For drywall, use toggle bolts (the typical "umbrella" anchors for hanging furniture) if going mechanical, or acrylic adhesive distributed across 4-6 points if going adhesive.
And if you want to remove them in the future
- Acrylic adhesives: cut the bead with a thin knife between panel and wall, peel slowly. Residues come off with isopropyl alcohol
- VHB tape: pull perpendicularly very slowly and steadily (not in one yank)
- Screws: simply unscrew. Holes are filled with putty in 5 min
Knowing you'll be able to remove them without destruction is what differentiates a professional installation from a hack.
Quick summary
- Rental: VHB double-sided tape or industrial velcro
- Owned home, lightweight panels: acrylic adhesive in beads
- Heavy or professional panels: batten frame + screws
- You want maximum bass absorption: ALWAYS separate with air gap
Calculating how many panels you need and where to place them is the head part. Installation is the hands part: with 30 minutes per panel and the right materials, it ends up perfect and lasts for years.
If you still don't know how many panels your room needs or where to place them, our acoustic configurator calculates it free in 2 minutes.