PET Acoustic Panels: Honest Pros, Cons and Best Uses

PET acoustic panels are felt made from recycled plastic bottles, pressed or needled into sheets that absorb sound. They have become the default choice for offices, schools and community buildings that want colour, texture and a lower environmental footprint without giving up much performance. They are not the best absorber on the market, and they are not the right answer for every job. Here is where they sit.

What PET felt is, and how it absorbs sound

PET is polyethylene terephthalate, the same plastic as a drinks bottle. Recycled PET is spun into fibres and bonded into a dense felt. Like mineral wool, it works because sound gets pulled into a maze of fine fibres and loses energy as it goes. There are no glass or mineral fibres, so it is pleasant to handle and doesn't shed irritant dust. Typical absorption sits below mineral wool and fibreglass but comfortably in the range that fixes echo in an ordinary room. Our material comparison puts numbers on the differences.

Where PET felt is the right choice

• Schools and nurseries: non-fibrous and tactile-safe, which is why it is a common education specification. See schools.
• Village halls and community buildings: durable, low maintenance and kind to a modest budget. See village halls.
• Design-led offices and hospitality: it takes colour well and can be cut, layered and shaped, so logos and 3D forms are practical.

The advantages

• Strongest in the mid to high frequencies, where speech and office noise sit.
• No mineral fibres, and a clean, dry installation.
• Felt cuts cleanly, so shapes, cut-outs and layered designs are straightforward.
• Recycled content, and it stays recyclable at end of life.
• Light and durable, with little maintenance beyond an occasional vacuum.

The limits

• Peak absorption is a step below mineral wool and fibreglass at the same thickness. In a room that needs a very tight reverberation target, you may need more area or greater thickness.
• Fire performance depends on the product, treatment and thickness. Always ask for the Euroclass rating rather than assuming. See our fire ratings guide.
• Recycled content claims differ between manufacturers. Ask for the declaration if it matters to your project.
• Cutting is best done in the factory to confirmed dimensions, not on site, to keep edges clean.
• Colour can vary between production batches, so order a large run from a single batch.

PET felt compared with the alternatives

What to ask before you order

1. The tested absorption class and the test report for the exact thickness you are buying.
2. The Euroclass fire rating of the finished product.
3. The recycled-content declaration, if you are claiming it in a sustainability report.
4. Batch and lead time, so a large order arrives in one colour.

Common questions

Is PET felt as effective as mineral wool? For the mid to high frequencies that cause most echo problems, yes in practice. At the extremes mineral wool has the edge.

Can it be recycled again? Yes, PET felt remains recyclable at end of life.

Is it safe around children? It is a common specification for schools, being non-fibrous.

See it in colour before you decide

Colour and texture are the whole reason to choose PET, so check them under your own lighting. Ask us for samples, book a free survey, or browse PET acoustic products.