Written by Mr. Xiao — Acoustic Materials Specialist, Feltcombo

10+ years in PET acoustic panel production & global project supply  |  Updated: 2026

24mm PET Acoustic Panels: Maximum Sound Absorption for Studios, Cinemas & High-Spec Commercial Projects

Let me be direct: most buyers asking about 24mm PET acoustic panels are not browsing out of curiosity. They are acoustic consultants with a specification to meet, studio designers who cannot afford a second round of remediation work, or project managers who need a single qualified supplier to cover bulk volume across multiple sites. If that sounds like your situation, this page was written for you.

24mm is not a mainstream thickness. Walk into a trade fair and nine out of ten PET panel samples you pick up are 9mm or 12mm. That is fine — those thicknesses cover the majority of applications. But when the project brief calls for NRC values above 0.90, when the room requires control of low-to-mid frequency energy, or when the client simply will not compromise on acoustic performance, 24mm is the spec that delivers. The problem is that very few factories can actually make it well, and fewer still can supply it at project scale from a qualified, certified facility.

At Feltcombo, 24mm panels are part of our standard product programme. We produce them in both our China factories (Jiangsu and Guangdong) and our Thailand facility, which has been operational since 2023. Custom sizes, surface patterns, and fire-rated formulations are all available. What follows is a thorough breakdown of everything a specifier or procurement lead needs to evaluate this product for a real project.

When to Specify 24mm: Performance vs. Cost Trade-off

The honest answer is that 24mm is overkill for a lot of projects — and I will not pretend otherwise. An open-plan office with a target RT60 of 0.6 seconds? 9mm or 12mm panels, well distributed, will typically get you there. A hotel lobby that just needs to feel quieter? Same story.

Where 24mm earns its place is in a specific category of rooms: those with demanding low-frequency loads, limited surface area for treatment, or tight acoustic performance contracts with no tolerance for underperformance.

• Recording studios and mixing rooms — Broadband absorption, especially below 500 Hz, requires mass. A 24mm panel mounted with an air gap delivers meaningfully more absorption in the 250–500 Hz octave band than a 12mm panel in the same position. For a room that needs a flat decay curve, that difference is not academic.

• Cinemas and screening rooms — Modern cinema audio standards (Dolby Atmos, DTS:X) are calibrated against precise reverberation targets. Seat count and room geometry are fixed; acoustic treatment has to do the heavy lifting. 24mm panels, particularly when used on rear and side walls, give the acoustic designer more headroom.

• Auditoriums and multipurpose performance halls — Variable acoustics are complex. When a room is required to perform for speech, amplified music, and unamplified performance, 24mm panels on movable or fixed baffles provide the absorption coefficient depth needed to tune the space.

• Broadcast studios and podcast production suites — The market for high-end content production infrastructure is growing. Operators investing in permanent facilities do not want to retrofit. Specifying 24mm from the start is a once-and-done decision.

• Projects with limited wall area — If you can only treat 30% of a room's surfaces, the NRC per square metre matters. 24mm outperforms thinner panels in that constraint.

On cost: yes, 24mm panels cost more per panel than 9mm or 12mm. Material volume is higher. Production time per panel is longer. But when I talk to acoustic consultants who have specified both, the consistent feedback is that the cost premium is trivial relative to the cost of a remediation visit after handover. Specifying correct performance from the outset is always the cheaper outcome over a project lifetime.

Acoustic Performance at 24mm: NRC Benchmarks & Test Data

PET acoustic panels at 24mm thickness, manufactured with a fibre density in the 2,000–2,400 gsm range, consistently achieve NRC values between 0.85 and 1.00 under standard test conditions. The exact figure depends on fibre density, surface texture, mounting method, and the testing standard applied.

The table below presents typical absorption coefficient ranges at key octave bands for 24mm PET acoustic panels. These figures are based on industry testing benchmarks; project-specific test reports are available from Feltcombo upon request for specification documentation.

One thing I want to flag clearly: the density of the raw PET fibre matters as much as the thickness. A low-density 24mm panel can underperform a high-density 12mm panel at mid-frequencies. When sourcing from any manufacturer — including us — always confirm the gsm (grams per square metre) specification alongside thickness. Feltcombo's 24mm panels are produced with fibre densities that are validated against the absorption coefficient data we share with clients. If a supplier cannot give you a density figure, that is a warning sign worth paying attention to.

We also offer 24mm panels in plain, carved, embossed, and printed surface variants. The surface treatment has a minor effect on absorption (typically ±0.02–0.04 NRC) but does not fundamentally change the low-frequency performance advantage that 24mm delivers over thinner profiles.

🔗 Looking for thinner options? See our full range: 9mm PET Acoustic Panels  |  12mm PET Acoustic Panels  |  Plain PET Acoustic Panels Overview

Custom Sizes, Patterns & Finishes Available

This is where the conversation usually gets interesting with acoustic consultants. Standard sheet sizes work for straightforward projects. But studios, cinemas, and high-spec auditoriums almost never have standard wall configurations. Ceiling heights differ, recess depths vary, and the coordination between acoustic treatment, fire-rating, and interior finishes creates a constraint matrix that off-the-shelf products cannot always satisfy.

Feltcombo's approach to 24mm customisation covers five dimensions:

1. Sheet Dimensions

Our standard 24mm sheet is 2440mm × 1220mm — a 4×8 format that is familiar globally and travels efficiently in standard containers. However, for projects requiring longer panels (for example, full-height treatment in a cinema side wall without horizontal joints), we can produce to custom lengths. Maximum dimensions are confirmed at the quotation stage based on which factory handles the order. Please discuss your required dimensions with our team upfront; it avoids surprises at production scheduling.

2. Surface Finish

24mm panels are available in four surface configurations:

• Plain — Flat, smooth surface. Clean aesthetic, maximum design flexibility for paint or wallcovering overlays.

• Carved — CNC-cut surface patterns. Feltcombo operates 20 CNC cutting machines across facilities. Custom design files are accepted (DXF/DWG). Carved panels add diffusion alongside absorption, which is relevant for studios and broadcast rooms where specular reflection control matters.

• Embossed — Moulded 3D surface texture. Available in Feltcombo's standard emboss library or custom tooling for large-volume orders.

• Printed — Full HD surface printing via our 4 high-definition printing machines. Important for hospitality, premium cinema, and branded environments where the acoustic treatment must integrate into the interior design narrative.

3. Colour

24mm is produced against Feltcombo's colour programme. While the 39-colour and 59-colour standard stocks are maintained for 9mm and 12mm respectively, 24mm colour availability should be confirmed with our team at the enquiry stage. New colour development is supported for projects with qualifying volumes — we follow colour trend data and work with specifiers on project-specific palette requirements.

4. Edge Profile

Square edge is standard. Bevelled or shaped edges are available with CNC processing. For seamless wall installations in performance spaces, edge treatment is often a detail that makes a significant difference to the finished visual result.

5. Wood Veneer Facing

For projects where a timber aesthetic is required alongside high acoustic performance, Feltcombo offers wood veneer PET acoustic panels. A natural or technical wood veneer face bonded to a high-performance PET substrate gives architects the visual result they want without sacrificing absorption. This is a product configuration that very few manufacturers in the PET category can offer at all.

Production at Scale: China & Thailand Dual-Factory Capability

I want to address this directly because it is a genuine differentiator that is not always well understood by international buyers.

Feltcombo operates manufacturing in three China locations (Jiangsu and Guangdong) and one factory in Thailand. The Thailand facility has been in production since 2023. That matters for 24mm panels specifically because of two things: tariff logistics and supply redundancy.

Why Thailand Source Matters for 24mm Projects

Import duty considerations: Depending on the destination market, sourcing from a Thailand-origin manufacturer can offer duty advantages over China-origin goods. For buyers in the US, EU, Australia, and several Southeast Asian markets, Thailand's trade agreements create real landed cost differences. For a large auditorium project consuming several thousand square metres of 24mm panels, a 5–10% duty differential is not a trivial number.

Supply chain redundancy: The disruptions of the early 2020s reshaped how serious procurement managers think about single-source supply chains. Feltcombo's China-Thailand dual-factory structure means that a production disruption at one location — whether from logistics, regulatory, or capacity reasons — does not stop your project. Both facilities produce 24mm panels to the same specification and quality standards. Certificates are maintained at both plants.

Production capacity at 24mm: Feltcombo runs 12 production lines for PET acoustic panels globally, four of which were engineered in Germany. 24mm is a thicker panel and production throughput per line is lower than for 9mm or 12mm — a fact that any honest supplier should acknowledge. What this means in practice is that large 24mm orders benefit from forward scheduling. We work with project contractors to plan production windows rather than treating 24mm orders as interchangeable with stock items.

Plant area and capacity context: Our combined manufacturing footprint is 32,000m² across facilities. We have been exporting to 24+ countries since our founding in 2009. For a specifier making a 24mm specification decision, the question of whether the supplier can actually deliver at scale is legitimate. The answer at Feltcombo is yes — but it requires advance coordination, which I will explain in the next section.

Project Bulk Supply: MOQ, Lead Times & Logistics

This section is specifically for project contractors and procurement teams. Acoustic consultants specify; contractors buy. The questions that matter at the procurement stage are different, and I will answer them as plainly as I can.

Minimum Order Quantity (MOQ)

For 24mm panels in standard dimensions and colours confirmed within our production schedule, MOQ is negotiable based on project timeline and destination. As a general guide, orders under 100m² are better served by our standard stocked thicknesses (9mm and 12mm). For 24mm at genuine project scale — typically 300m² and above — we can structure supply agreements with competitive pricing tiers. Contact our team with your project volume and we will give you a realistic MOQ and pricing structure within 48 hours.

Lead Times

Standard 24mm panels: 20–35 working days from order confirmation, depending on factory loading and customisation complexity. Carved, embossed, or printed 24mm panels: add 7–14 working days for surface processing. For projects with hard installation deadlines, we recommend building a 3–4 week buffer into the procurement timeline and initiating the production booking as soon as the specification is locked. Do not wait for the general contractor to raise the purchase order — production slots fill up.

Logistics and Packaging

24mm panels are heavier than standard PET panels per sheet — roughly 2.8–3.2 kg/m² depending on density formulation. Packaging is designed for export: PE film per panel, foam corner protection, palletised in plywood crates. Standard FCL (20ft and 40ft) and LCL options are available. For Australia, Middle East, and European destinations, we have established freight relationships and can provide door-to-port CIF pricing on request. Thailand origin shipments often benefit from different port routing options compared to Jiangsu; for certain Southeast Asian and Pacific destination ports, Thailand origin reduces transit time by 3–7 days.

Payment and Supply Terms

Standard terms are T/T with deposit on order confirmation and balance before shipment. For repeat clients and projects with established supply agreements, we discuss more flexible terms. L/C is accepted for larger orders. We encourage first-time buyers to start with a sample order or small trial shipment to validate product quality before committing to full project volume — this is standard practice and we have no objection to it.

Certifications That Matter for High-Spec Projects (ASTM E84 / EN13501 / Fire Class A & B)

In my experience, certification is the area where specification projects most often stall. A consultant writes a spec, a contractor sources a product, and then the building control submission requires a test certificate that the supplier cannot produce. With 24mm panels — a niche thickness — this risk is higher because fewer suppliers have actually gone through the testing process for this specific format.

Feltcombo holds the following certifications relevant to PET acoustic panels:

A note on 24mm-specific certification: the certifications listed above are held for our standard 9mm and 12mm formulations. For 24mm panels in project specifications where a project-specific fire test certificate is required, please raise this at the enquiry stage. The formulation of our 24mm product uses the same flame retardant chemistry as our certified thinner panels, and we can guide you through the appropriate certification pathway for your jurisdiction. For most commercial projects, a declaration of performance based on the same formulation — not necessarily a thickness-specific full test — is accepted. However, this varies by jurisdiction and by the specific requirements of your building control authority. We prefer to have this conversation early rather than late.

GRS certification is worth highlighting separately for procurement teams with ESG reporting obligations or projects targeting LEED, BREEAM, or WELL credits. Our PET panels contain a minimum of 50% recycled PET content, the panels are themselves recyclable at end of life, and GRS certification provides the third-party verification chain needed for formal sustainability submissions.

🔗 Related reading: Feltcombo Full Certification Documentation  |  PET Acoustic Panels for LEED Projects  |  Acoustic Wood Slat Panels with CE Certification

Case Study: 24mm Panels in a Commercial Auditorium Project

The following describes a representative project type that reflects the kind of work Feltcombo regularly supplies 24mm panels for. Specific client identity is withheld per commercial confidentiality practice.

Project Context

A 1,200-seat multipurpose auditorium in a commercial mixed-use development in Southeast Asia. The facility was designed to accommodate corporate conferences, music performances, and theatrical productions — a variable-use brief that presents one of the more demanding acoustic design challenges in commercial construction. The acoustic consultant specified a target RT60 of 1.2–1.4 seconds for speech, with adjustable absorption to push RT60 up to 1.8–2.0 seconds for music events.

The Specification Challenge

The side walls and upper rear walls — approximately 1,800m² of surface area — required treatment that could deliver high NRC values in the 250–2,000 Hz range, integrate with the building's architectural language (dark fabric-effect finish), and meet the local fire regulation equivalent to EN13501 Class B. The architect was not willing to accept visible acoustic tile panels; the treatment had to read as an interior finish element, not an add-on product.

Why 24mm Was Specified

The acoustic consultant's simulation showed that 9mm or 12mm panels could achieve the upper RT60 target but could not reliably hit the lower speech target across all seating positions without extending treatment coverage to areas that the architect had designated as architectural feature elements. Rather than compromise the design, the acoustic consultant upspecified to 24mm with an air cavity, which added approximately 0.12 NRC in the 250–500 Hz range — enough to meet the performance brief within the available treatment area.

Feltcombo's Supply Role

Feltcombo produced 24mm plain panels in a custom dark grey colour with a lightly textured surface profile. The panels were printed to replicate a woven fabric texture — using our HD printing capability — which allowed the acoustic panels to read as fabric wall covering from audience distances. Total order volume was approximately 1,900m² including wastage allowance. Production was split between the Jiangsu facility and the Thailand plant, with coordinated shipping to arrive at the project site within a single 10-day delivery window to align with the contractor's fit-out programme.

Outcome

Post-occupancy acoustic measurement confirmed RT60 values within the specified range across both operating modes. The printed surface finish passed a site inspection without requiring any additional finishing work. The project was delivered on schedule. The total premium for 24mm over an equivalent 12mm supply was approximately 18% on panel cost — which represented less than 0.3% of the total project construction budget.

Frequently Asked Questions: 24mm PET Acoustic Panels

Get a Custom Quote from Feltcombo

If you have read this far, you are likely at or near a procurement decision. Here is what I recommend as the next step, based on where most specification projects are at this stage:

• If you are an acoustic consultant finalising a specification: Send us your target NRC values, frequency range requirements, project jurisdiction (for certification confirmation), and approximate surface area. We will return a technical data sheet and certification documentation within 2 business days.

• If you are a studio or cinema designer: Request samples of our 24mm panels in relevant surface finishes. A physical sample in your hands is worth more than any specification document for evaluating aesthetics and material quality.

• If you are a project contractor or procurement manager: Send us your bill of quantities, project timeline, and delivery destination. We will quote from both China and Thailand origin so you can evaluate the total landed cost for each scenario.

Our team's response commitment on project enquiries is 48 hours, Monday to Friday. For urgent project timelines, note "URGENT" in your email subject line and include a project deadline date.

Contact: info@feltcombo.com  |  Phone: +86 512 6728 5061  |  Address: No. 108 Yunhui Road, Industrial Park, Suzhou 215000, China