24 mm PET Felt Acoustic Panels – Thick, Dimensionally Stable Panels for Structural Applications, Furniture, and Room Dividers
The vitAcoustic 24 mm PET felt acoustic panel in the 2440x1220x24 mm format is our thickest and most rigid panel. Its main advantage lies less in acoustics than in its thickness and stiffness: These properties make it possible to create self-supporting and load-bearing components – furniture components, freestanding room dividers and partitions, or rigid elements that would not be possible with 9- or 12-mm panels.
At 3.5 kg/m² (Standard) or 4.0 kg/m² (project density), it is considerably more substantial than the thinner panels. It is a specialty and project product: 24 mm panels are primarily manufactured specifically for larger projects – and are therefore priced higher than 9 and 12 mm panels.
What 24 mm Is Designed for – and What It Is Not
For typical wall and ceiling absorbers, the 24 mm material thickness offers little additional benefit: A thinner panel with an air gap or our nonwoven composite achieves the same high sound absorption class at a significantly lower cost. 24 mm is particularly useful when you want acceptable absorption without a nonwoven composite backing – this is achievable, but requires more material.
The 24-mm panel's real strength comes into play where stability is required: as a load-bearing furniture component, a freestanding, dimensionally stable room divider, or a structural element. That is exactly what it is designed for.
Acoustic Performance (Tested to ISO 354, Rated to DIN EN ISO 11654)
Thanks to its thickness, the 24-mm panel absorbs noticeably more sound than thinner panels even when mounted directly on the wall – although it does not deliver top-level performance. The weighted sound absorption coefficient αw and NRC values are:
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Directly on the wall: αw 0.50 / NRC 0.60 – Class D (thinner panels only achieve Class E here)
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50 mm air gap: αw 0.60 / NRC 0.75 – Class C
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100 mm air gap: αw 0.90 / NRC 0.85 – sound absorption class A
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150 mm air gap: αw 0.95 / NRC 0.90 – sound absorption class A
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Nonwoven composite or ceiling cloud: sound absorption class A
All classes and performance values apply to the specified mounting condition; measurements to ISO 354, rating to DIN EN ISO 11654. An Intertek report confirms αw 0.95 (Class A) for 24 mm with a large air gap.
The practical benefit is primarily in direct mounting without an air cavity: Where neither an air gap nor a nonwoven composite is possible, the 24-mm panel achieves a reasonably acceptable sound absorption coefficient (αw 0.50) through its material thickness alone – more than thinner panels, but not a top value. This is enough for a noticeable improvement; however, meeting the DIN 18041 targets for reverberation time usually requires support from additional absorber surfaces in the room. If an air gap or a nonwoven composite is feasible, thinner panels can also achieve Class A – at a lower cost.
Applications
Furniture and structural applications: load-bearing and self-supporting components, seating and partition elements, furniture components with rigid backs – the thickness gives the panel the necessary stiffness.
Room dividers and partitions: freestanding, dimensionally stable partition elements that divide spaces while absorbing sound.
Wall and ceiling absorbers (where thickness is desired): solid absorption without a composite backing, for example as a distinctive wall surface with visual depth.
Contract and commercial applications: presentable, robust elements for offices, hotels, and retail interiors.
Alternative: Duo Instead of a Solid 24-mm Panel
Need the thickness, but want more color options or a lower price? Our Duo option is the alternative: Two thinner panels are bonded together in two layers.
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Duo 2×12 mm = 24 mm – the same thickness as the solid 24-mm panel, using the wider 12-mm color palette
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Duo 2×9 mm = 18 mm – a slightly thinner, also very rigid option, available in two colors on request
Select the Duo options directly in the product configuration for the 9-mm or 12-mm panel.
Colors, Availability, and Delivery Time
Because maintaining extensive 24-mm inventory across 50+ colors would be very costly, the 24-mm panel is available in only a few colors – which we keep in stock in Germany. Specific availability depends on the collection, shown in the color dropdown (stock and delivery time for each color):
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Extended: available from 1 panel (stock held by the manufacturer or our inventory in Germany)
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Production: custom production from approx. 200–300 panels per color – custom dimensions optimized to minimize waste are possible here (particularly economical given the high material cost of 24 mm panels)
We generally manufacture project panels at the 4.0-kg/m² density; surplus panels are added to our inventory so they are available in the shop (4.0 kg at a slightly higher price than 3.5 kg). Rapid expansion of the 24-mm range depends on demand and is not currently planned in the near term.
Material and Manufacturing
The vitAcoustic PET felt panel is made from recycled PET plastic bottles, which are processed into textile fibers and laid into a fiber web using a felting process. This web is thermally bonded: A proportion of blended-in PET melt fibers (bicomponent fibers) partially melts in the oven and fuses the structure into a dimensionally stable panel – entirely without chemical adhesives or binders. At 24 mm, the higher density provides particularly high stiffness. The recycled content is certified by SCS Global Services.
- High density and stiffness (3.5–4.0 kg/m²) – dimensionally stable and load-bearing
- Moisture-insensitive and water-resistant
- Resistant to mold, pests, and dust mites
- Suitable for allergy sufferers – no volatile ingredients
- Fully recyclable at the end of its service life
Fabrication and Installation
The panel can be cleanly sawn and cut to size using standard woodworking tools (circular saw or jigsaw). Its thickness makes it well suited for screw-fastened structural joints. Various fastening systems are available depending on the application:
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Adhesive bonding: e.g., UHU Polymax High Grip, UHU por contact adhesive, or double-sided adhesive tape (CT-S 5735)
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Screws and staples: particleboard screws, staples – the thickness provides purchase for screws
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Z-clips (Z-Clip): for removable, precisely aligned wall mounting
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Ceiling cable suspension and Halfen channels: for suspended elements and baffles
Cleaning and care: vacuum or wipe with a damp cloth, as with textile coverings. Stubborn grease stains can be removed with a little thinner, and coffee or wine stains can be bleached with hydrogen peroxide (H2O2) – without damaging the PET fiber or color.
Certifications and Standards
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Flame-resistant to EN 13501-1 (B-s1,d0) – tested by SGS, equivalent to fire class B1 under DIN 4102
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OEKO-TEX Standard 100 – tested for harmful substances, suitable for kindergartens, schools, and clinics
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Greenguard Gold – low VOC emissions for healthy indoor air
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EPD (Environmental Product Declaration) – relevant to DGNB and LEED certification
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SCS Recycled Content – certified recycled content
Technical Properties
| Property |
Value |
| Construction |
Single-layer PET felt, thermally bonded (melt fibers); solid 24 mm |
| Material |
PET felt made from recycled PET bottles, thermally bonded – without chemical binders |
| Thickness |
24 mm (solid); alternatively Duo 2×12 mm or 2×9 mm |
| Areal weight |
3.5 kg/m² (Standard) · 4.0 kg/m² (project density) |
| Acoustic function |
Porous broadband sound absorber; solid absorption even without an air cavity/composite |
| Sound absorption class |
D directly on wall · C (50 mm air gap) · A (air gap of 100 mm or more, nonwoven composite, or ceiling cloud) |
| αw |
0.50 (directly on wall) · 0.60 (50 mm air gap) · 0.90 (100 mm air gap) · 0.95 (150 mm air gap) · to DIN EN ISO 11654 |
| NRC |
0.60 (directly on wall) · 0.75 (50 mm air gap) · 0.85 (100 mm air gap) · 0.90 (150 mm air gap) |
| Frequency range |
Broadband; thickness provides effective absorption into the low-midrange frequencies even without an air cavity |
| Edge finish |
CNC-cut edge; suitable for screw-fastened structural joints |
| Surface texture |
Smooth or V-Cut (Lines/Bricks/Triangle); optional UV printing. V-Cut grooves also scatter sound (diffusion) |
| Color configuration |
Only a few colors in 24 mm (Extended/Production), stocked in Germany; wider selection via Duo 2×12 mm |
| Made to measure |
CNC cut to size from a 2440x1220x24 mm raw panel; waste-optimized custom dimensions in Production (from 200–300 panels) |
| Fire classification |
Flame-resistant B-s1,d0 to EN 13501-1 (SGS; equivalent to DIN 4102 B1) |
| Recycled content |
Recycled PET, content certified by SCS |
| Environmental declaration |
EPD (relevant to DGNB/LEED); Greenguard Gold |
| Harmful substance testing |
OEKO-TEX Standard 100 |
| Care |
Vacuum / wipe with a damp cloth; remove grease with thinner, bleach coffee/wine stains with H2O2 (without damaging the material) |
Samples, Data Sheets, and Shipping
Free color samples are available in the Samples and Miscellaneous category. Technical data sheets, absorption values, and certificates are available in our download section. As a heavy panel in the 2440x1220x24 mm format, the 24-mm product is shipped as palletized freight via a freight forwarder.
Planning a project or need custom dimensions? Call us at +49 7248-93566-90 or email [email protected] – we manufacture to your specifications.
