24 mm PET Felt Acoustic Panels – Thick, Rigid Panels for Structural Applications, Furniture Construction, 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 allow you to create self-supporting components capable of bearing static loads – 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 substantially heavier than the thinner panels. It is a specialty and project product: 24 mm panels are predominantly manufactured specifically for larger projects – accordingly, their price level is higher than that of 9 and 12 mm panels.
What 24 mm Is Designed for – and What It Is Not
For typical wall and ceiling absorbers, a material thickness of 24 mm 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 shows its real strength wherever 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. We specify the weighted sound absorption coefficient αw and the NRC value:
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Directly on the wall: αw 0.50 / NRC 0.60 – Class D (thinner panels achieve only Class E under these conditions)
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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 refer to the mounting method specified; measurements to ISO 354, rating to DIN EN ISO 11654. An Intertek report confirms αw 0.95 (Class A) for 24 mm panels 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 absorption value (αw 0.50) through its material thickness alone – higher than thinner panels, but not a top-level value. This is enough for a noticeable improvement; however, achieving 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 construction and structural applications: load-bearing and self-supporting components, seating and divider elements, furniture components with rigid backs – the thickness gives the panel the necessary stiffness.
Room dividers and partitions: freestanding, dimensionally stable divider elements that organize 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 interiors: presentable, robust elements for offices, hotels, and retail fit-outs.
Wall Cladding: Decorative, Acoustically Effective, and Thermally Insulating
As acoustic wall cladding, the PET felt panels combine design and function in a single layer. More than 50 colors are available, all with a fire classification of B-s1,d0 (flame-resistant to EN 13501-1). V-Cut textures and direct UV printing turn the panel into a customized wall surface – from a simple single-color surface to an image or logo.
The wall cladding serves two functions: It absorbs sound and insulates the wall on the interior side. The textile surface feels warmer than plaster, concrete, or glass and stays warmer than the cold wall behind it – a noticeable comfort benefit, especially in rooms that are not heated continuously for cost reasons. Acoustic comfort and a warmer-feeling room thus come from a single material.
Alternative: Duo Instead of a Solid 24-mm Panel
Need the thickness, but want more color options or a lower price? Our Duo option offers an 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 broader 12-mm color palette
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Duo 2×9 mm = 18 mm – a slightly thinner version that is also very stable, 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
Our PET colors are divided into four collections – these determine stock location, minimum quantity, and delivery time, depending on color and material thickness (the same color may belong to a different collection depending on thickness). The collection is included in the item number; you can see the current stock level, delivery time, and minimum order quantity for each item directly in the “PET Color” selection field.
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Standard & Trend: over 30 colors continuously stocked at our warehouse in Germany and regularly replenished – available from 1 panel, with smaller quantities usually delivered in just 1–2 weeks, including cutting to size and processing
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Extended: also available from 1 panel, with a delivery time of approx. 6 weeks (rail freight). We stock several thousand panels in selected colors and thicknesses in Germany, and many times that quantity at our production site – because changing over PET production involves high setup costs, it is only economical in large quantities. This inventory investment is supported by the global market, not Europe alone; it enables us to provide the full range of colors and thicknesses
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Production: manufactured specifically for your project – from approx. 300 panels (in some cases from 200). We can start a production batch at any time, match any desired color, and supply custom sizes; production runs continuously at a width of 244 cm, with freely selectable cuts in width and length
Fast delivery, including cutting to size and processing, is one of our strengths – especially for projects with tight deadlines.
In 24 mm, we stock only a few colors – most are supplied through Production (custom production from approx. 200–300 panels per color), which allows custom sizes optimized to minimize waste.
We generally manufacture project panels at the 4.0-kg/m² density; surplus panels that are not needed are added to our stock and made 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 short term.
Material and Manufacturing
The vitAcoustic PET felt panel is made from recycled PET plastic bottles that 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
- Unaffected by moisture and water-resistant
- Resistant to mold, pests, and dust mites
- Suitable for allergy sufferers – no volatile constituents
- Fully recyclable at the end of its service life
Fabrication and Installation
The panel can be cleanly sawn and cut to size with standard woodworking tools (circular saw or jigsaw). Its thickness makes it well suited to screw-fastened structural joints. Various mounting 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 a secure base for screws
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Z-rails (Z-Clip): for removable, precisely aligned wall mounting
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Ceiling suspension cables and Halfen channels: for suspended elements and baffles
Cleaning and care: Vacuum or wipe with a damp cloth, as you would 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.
Certificates and Standards
Tested for harmful substances and low-emitting: Our PET acoustic panels are GREENGUARD Gold certified (UL 2818) and meet strict limits for indoor chemical emissions. Formaldehyde emissions are far below the requirements applicable throughout the EU from August 6, 2026 (REACH Annex XVII). In addition, the materials are tested for substances of concern to human health according to OEKO-TEX Standard 100.
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Flame-resistant to EN 13501-1 (B-s1,d0) – tested by SGS, equivalent to fire classification B1 under DIN 4102
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OEKO-TEX Standard 100 – tested for harmful substances, suitable for preschools, schools, and hospitals
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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; its thickness provides effectiveness down into the low-mid frequency range 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; custom production sizes optimized to minimize waste (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 (UL 2818, below the REACH emission limit) |
| 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 area. As a heavy panel in the 2440x1220x24 mm format, the 24-mm product is shipped as palletized freight by a freight forwarder.
Planning a project or need custom sizes? Call us at +49 7248-93566-90 or email [email protected] – we manufacture to your specifications.
