PET acoustics for European interiors Samples & technical documents
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Technical library

The parts of the specification that get argued about.

Three notes we end up writing on most projects: how to read acoustic data, how European fire classification works, and what recycled content actually contributes to an assessment.

01 Acoustic data 02 Fire classification 03 Recycled content & EPD Downloads FAQ

Note 01

Reading acoustic data: NRC, αw and what they leave out.

A single number cannot describe how a panel behaves in a room. It is still the number that ends up in the specification, so it is worth knowing what it hides.

NRC is the arithmetic average of absorption at 250, 500, 1000 and 2000 Hz, rounded to the nearest 0.05. It is quick, blunt and standard in North America. Our 12 mm board measures 0.85 to ISO 354.

αw weights the same measurements according to EN ISO 11654, with a shape indicator (L, M or H) for how absorption behaves at low and high frequency. A product with αw 0.80 (MH) is not the same as one with αw 0.80 (L): the first absorbs speech, the second absorbs motor noise better.

Mounting matters more than the panel. The same board on a batten with a 50 mm air gap absorbs differently from the same board glued flat. Test reports are only comparable when the mounting condition matches — that is why a report should state the build-up, not just the board.

Reverberation is a room property. Adding 10 m² of absorber to a 200 m² hard room will not fix a 1.8 s reverberation time. We can help estimate quantities, but the target should come from an acoustic consultant working from the room volume and use.

Note 02

Fire classification in the EU, without the folklore.

"Class B" on its own says very little. The suffix letters are the part that decides whether a product can be used on an escape route.

The letters. EN 13501-1 classifies reaction to fire from A1 (non-combustible) to F. Our board is classified B for 12 mm and 24 mm. The suffix s1 limits smoke, d0 rules out burning droplets — both matter in corridors and stair cores.

ASTM E84 is a different test. It reports flame spread and smoke developed indices, giving Class A, B or C. Class A is not the same as Euroclass A; the tests measure different things and cannot be mapped onto each other.

What is tested. The classification applies to the board as tested — thickness, density and facing. A printed or fabric-wrapped variant may need its own assessment. If a project depends on the classification, tell us the exact build-up so we can confirm which report applies.

What it does not do. A reaction-to-fire classification does not make a wall or ceiling system fire-rated. Fire resistance (EI 30, EI 60) is a property of the complete assembly and is tested separately.

Note 03

Recycled content and EPDs: what they actually support.

Sustainability documentation is often collected for its own sake. It is more useful when you know which credit each document answers.

Recycled content (SCS certified, ≥ 60% post-consumer) supports material credits and responsible-sourcing criteria. It is a percentage by mass of the product, verified per family — not a marketing estimate.

An EPD to EN 15804 reports life-cycle impacts per declared unit: global warming potential, acidification, eutrophication and so on. It supports product-disclosure and life-cycle credits in LEED and BREEAM, and it is the document most likely to be requested by a European assessor.

Low-emission certification (GREENGUARD Gold) answers indoor-air-quality credits and increasingly appears in client health-and-wellbeing requirements, even where no rating scheme is used.

What none of it proves. No combination of certificates demonstrates that a product is "sustainable". They document specific impacts and attributes. Treat them as evidence for a claim, not as the claim itself.

Downloads

Technical documents.

Issued on request so the version you hold matches the product you are buying.

Technical data sheet
PDF · EN
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Acoustic test report (ISO 354)
PDF · EN
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Fire classification (EN 13501-1)
PDF · EN
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ASTM E84 report
PDF · EN
Request →
Environmental Product Declaration
PDF · EN 15804
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REACH / RoHS declaration
PDF · EN
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Fixing & installation guide
PDF · EN
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Care & maintenance
PDF · EN
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FAQ

Questions from specifications.

What is the difference between NRC and αw?
NRC is a single-number rating calculated from absorption at four frequencies (250, 500, 1000, 2000 Hz), used mainly in North America. αw is the weighted absorption coefficient defined in EN ISO 11654, used in Europe. They are not interchangeable, and a product that publishes one may not publish the other.
Does an EN 13501-1 Class B classification mean the panel cannot burn?
No. It means the panel's contribution to fire growth and smoke is limited under the test conditions. The classification supports a fire strategy; it does not replace one.
Can PET panels be used behind a radiator or near a heat source?
PET softens at elevated temperature. Keep panels clear of continuous heat sources and follow the fixing guide for clearances. If in doubt, ask us with the detail.
Do I need a vapour barrier?
No. PET is breathable and does not require a vapour barrier on internal walls. In humid or exterior applications, consult us before specifying.
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