Fabric vs PET Acoustic Panels: Which Sounds Better?

When you're comparing fabric vs PET acoustic panels for an office, studio, or village hall, the number that matters most is the Noise Reduction Coefficient, and the gap between the two materials is bigger than you might expect.

Professional fabric-wrapped panels can achieve an NRC of 0.85 to 1.00, meaning they absorb almost every sound wave that hits them, while budget alternatives routinely fall well short of that mark. We get asked which material performs better almost every week, and the honest answer depends on what you're treating, how the room is used, and how much of your budget goes toward the fabric or facing rather than the acoustic core underneath it.

Fabric vs PET Acoustic Panels: The Headline Difference

Walk into a room with painted plaster walls, a hard floor, and a bank of windows, and sound will bounce back and forth rapidly, building up into a noise floor that makes speech hard to follow. Both fabric-wrapped and PET felt panels are designed to interrupt that cycle.

The headline difference is what happens once sound energy reaches the panel face. Fabric-wrapped panels wrap a porous acoustic core, usually mineral wool or high-density glass fibre, in a taut textile.

That combination lets sound pass through the fabric, get trapped and dissipated inside the dense core, and never bounce back. PET panels use compressed recycled polyester fibre as both the structure and the finish, which absorbs well at certain frequencies but is typically less dense than a wrapped mineral wool core.

How Fabric-Wrapped Panels Work: NRC, Absorption, and Speech Intelligibility

Fabric-wrapped acoustic panels work because the core does the heavy lifting and the fabric simply lets sound in without reflecting it. Our SilentSpace Fabric Wrapped Acoustic Ceiling Raft uses a 40mm core faced in Camira Sonus or Lucia fabric, and because it's suspended below the concrete soffit, it absorbs across both faces and its exposed edges.

That's a meaningful practical detail: a ceiling raft removes more total sound energy per square metre than a flat wall panel of the same size, because there's no wall behind it reflecting energy back.

Baffles work on the same principle but hang vertically, which is useful when ceiling height is limited or you need to break up long, flat expanses of soffit without losing headroom. Both approaches deliver high NRC performance because the fabric never gets in the way of absorption, it simply hides the core underneath a finish that suits the room.

How PET Felt Panels Work: Recycled Fibre and Its Acoustic Limits

PET acoustic panels are made from compressed recycled polyester fibre, often sourced from post-consumer plastic bottles, pressed into rigid or semi-rigid boards. The fibre structure traps sound in the gaps between strands, which works reasonably well at mid and high frequencies but tends to struggle with lower ones.

Standard acoustic foam and many entry-level PET boards only rate between 0.4 and 0.6 NRC, meaning they absorb just 40% to 60% of incoming sound rather than the near-total absorption fabric-wrapped mineral wool panels can achieve.

Did You Know?

 Standard acoustic foam and many budget PET panels rate between just 0.4 and 0.6 NRC, absorbing only 40% to 60% of incoming sound.

That doesn't make PET a bad choice. It makes it a specific one, better suited to spaces where speech clarity in the 500Hz to 2kHz range is the priority rather than deep bass control, and where the lighter weight and lower cost per square metre matter more than absolute absorption.

Fabric vs PET Acoustic Performance: Comparing NRC Ratings Side by Side

The clearest way to see the fabric vs PET acoustic gap is to look at NRC ratings across a typical product range rather than a single panel. Fabric-wrapped panels with a dense mineral wool core consistently land at the top of the scale, often rated 0.85 or higher, while PET felt boards vary more depending on thickness and density.

NRC ratings show fabric panels can hit near-total absorption, while typical PET foam panels trail behind

A panel with an NRC of 0.85, which is common across our fabric-wrapped range, absorbs 85% of the sound waves that strike it. That single figure explains why fabric wrapping tends to win out in rooms where reverberation time is the core problem, such as sports halls, open-plan offices, and double-height atriums.

Best Fabric-Wrapped Panels for Offices and Meeting Rooms

Open-plan offices are one of the clearest cases for fabric over PET, because the acoustic problem usually spans the full frequency range, not just speech frequencies. Reflections off desks, glass partitions, and hard ceilings compound quickly in a busy office, and a joined-up approach using both ceiling rafts and wall panels tends to outperform a single-surface fix.

The SilentSpace Circle Acoustic Panels (from £115.00) and the Fabric Wrapped Rectangle Acoustic Raft (from £129.00) both use the same fabric-wrapped construction, just in different silhouettes, so you can mix shapes on a single ceiling plan without mixing acoustic performance. For a deeper look at layout options, our guide on meeting room acoustic panels covers coverage ratios room by room.

Fabric Wrapped Wall Panels: Squares, Rafts, and Custom Shapes

Wall-mounted fabric panels give you the same absorption performance as ceiling rafts, without needing suspension hardware or a clear ceiling void. That makes them the low-disruption retrofit option for tenanted offices or listed buildings where you can't touch the ceiling structure.

The Fabric Wrapped Square Acoustic Raft (from £129.00) ships in multiple sizes with installation fixings and spray adhesive included, which keeps the total cost predictable rather than adding fixings as a separate line item later. Fabric options like Camira Sonus and Lucia let you match a colour scheme without compromising the NRC rating underneath, since the acoustic performance sits entirely in the core, not the finish.

Where PET Acoustic Panels Still Make Sense

None of this means PET panels are the wrong choice. They're genuinely useful where weight, cost, or a specific decorative pattern matter more than maximum absorption, and where the room's biggest problem is speech clarity rather than deep reverberation.

A classroom with a modest ceiling height, a small meeting pod, or a corridor with light foot traffic often doesn't need 0.85+ NRC treatment across every surface. PET's lighter weight also makes it easier to specify across very large wall or ceiling runs without loading the structure, and recycled polyester content supports sustainability targets that some organisations now require in a tender.

Our Autex Cube PET Acoustic Panel is a good example of the category done properly: a rigid, patterned PET board that's fast to install across large areas at a lower cost per square metre than fabric wrapping.

Durability and Long-Term Cost: Fabric vs PET Acoustic Panels Over Time

Acoustic treatment is a long-term investment, not a one-off decoration job, and durability is where fabric-wrapped panels often justify a higher upfront cost. Quality fabric panels routinely last 20 or more years without meaningful degradation in either appearance or absorption performance.

Budget foam and lower-grade PET options tell a different story. Cheap foam and thin felt boards can crumble, discolour, or lose structural integrity in as little as 2 to 3 years, especially in rooms with UV exposure or high humidity.

Did You Know?

Cheap foam and low-grade felt panels can crumble or discolour in just 2 to 3 years, while quality fabric-wrapped panels last two decades or more.

Fabric vs PET Acoustic: Which Should You Choose for Your Space?

The best choice depends on your room, your ceiling height, your budget, and the specific acoustic problem you need to solve. A church nave with a long reverberation tail and a lot of hard stone surface almost always calls for fabric-wrapped rafts and wall panels, because the goal is controlling low-frequency buildup as much as clarifying speech.

A home office or small pod, by contrast, might do everything it needs with PET panels at a fraction of the material cost. Our guide to the best acoustic panels for productive home offices breaks this down room type by room type, and our buyer's guide for churches does the same for larger, more reverberant spaces.

The fix is rarely to deaden the entire room. It's to treat the surfaces causing the worst reflection points, whichever material gets you there most efficiently.

Conclusion

When it comes down to fabric vs PET acoustic panels, the science is straightforward even if the decision isn't always simple. Fabric-wrapped panels deliver higher NRC ratings, longer working lives, and better performance across the full frequency range, which is why we specify them for offices, churches, and village halls where reverberation time is the dominant problem.

PET panels earn their place where weight, budget, or a specific pattern matter more than absolute absorption. Whichever direction you lean, browsing our acoustic wall panels collection is the fastest way to compare real NRC figures, fabric options, and pricing before you commit to a spec for your space.