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Acoustic Islands or Baffles - Which Does Your Space Need?

Acoustic islands - also called rafts or canopies - hang horizontally below the structure, whereas baffles hang vertically. Both absorb sound, but the orientation changes what they're good at, how many you need and what they cost. If you're working under an exposed soffit and a full suspended ceiling isn't an option, you'll need either of these.

Islands and baffles at a glance

 

  Acoustic islands Acoustic baffles
Also known as Rafts or canopies - used interchangeably Usually just ‘baffles’
How they hang Horizontally - like a floating section of ceiling Vertically - hung in rows, like fins
Best for Defining a zone; a finished ceiling look under exposed services Maximum absorption across a whole volume
Typical spaces Reception, meeting areas, retail, hospitality, breakout Open-plan offices, sports halls, industrial units, atria
Look Clean, frameless, architectural Rhythmic, exposed, more industrial
Rockfon range Eclipse, Eclipse Colour, Hub, Canva Island Universal Baffle, Contour, Industrial, Humitec
Absorption Up to 5.4 m² equivalent absorption per island (Eclipse Rectangle 2360, 500 mm suspension) Up to 0.93 m² equivalent absorption per baffle (Universal 1200×600, C1200 spacing)
Fire class A1 (A2-s1,d0 on Eclipse Rectangle 2360) A2-s1,d0 (Universal Baffle)
Scaling up Add more islands, or go bigger per unit Add rows, or close the spacing

Still not sure? Send us the room dimensions, the ceiling height and what the space is used for. We'll tell you which one fits, and roughly how many you'll need.

What the data sheets don't tell you

01-compare-figures

The absorption figures mislead

An Eclipse island is quoted up to 5.4 m². A Universal Baffle up to 0.93 m². But you hang far more baffles than islands so make sure you compare total absorption across the area, not per unit.

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Closer baffles absorb less

Rockfon's own figures show a 1200×300 baffle absorbs up to 0.28 m² at 300mm centres, and up to 0.46 m² at 600mm. Hung close together, baffles shield each other.

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Baffles leave the soffit open

An island is a horizontal plane between the room and everything above it. Baffles hang with gaps, so services stay accessible. On maintenance-heavy buildings that decides it, not the acoustics.

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Horizontal surfaces gather dust

A large horizontal surface collects dust; a thin vertical fin doesn't. Irrelevant in an office. Worth thinking about in food production, labs or clinical areas with a cleaning regime.

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Plan around the services first

Both hang from the same soffit as the sprinklers, lighting and ductwork. Plan the acoustic layout first and it's clean. Plan it after and you're working around what's already there.

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Fire class varies by product

Stone wool being non-combustible doesn't mean every product matches. Rockfon Eclipse is A1; the Universal Baffle is A2-s1,d0. Where a spec says A1, check the individual product.

Which one for your space?

   Choose islands when:

  • You want the space to read as a finished ceiling, not an exposed one

  • You're defining a zone - reception, breakout, a meeting area within a bigger floor

  • The look matters as much as the acoustics

  • The ceiling is a design feature rather than a technical solution

   Choose baffles when:

  • You need maximum absorption across a whole volume

  • The space is large and hard-surfaced - sports halls, atria, industrial units

  • Services above the ceiling need to stay accessible

  • Budget per square metre of absorption is the deciding factor

Plenty of schemes use both - islands over the areas people gather, baffles across the open floor.

If you're not sure, send us the room dimensions, the ceiling height and what the space is used for, and we'll tell you what fits.

Browse the ranges

Rockfon and Knauf Ceiling Solutions both offer a range of acoustic islands, baffles, rafts and canopies

FAQs

What's the difference between an acoustic island and an acoustic baffle?

An island hangs horizontally, like a floating section of ceiling, and works well for defining a zone under an exposed soffit while still looking like a finished ceiling. A baffle hangs vertically, like a fin, and absorbs sound across a larger volume. Baffles generally deliver more absorption for the area of product used; islands generally look more architectural.

How many acoustic baffles do I need?

It depends on the room volume, the surfaces in it and the reverberation time you're working to. The important thing to know is that the relationship isn't linear — baffles hung at closer centres shield each other, so each one absorbs less. Doubling the quantity won't double the performance. Send us the room dimensions and the target and we'll work it through with you.

Can you use islands and baffles in the same space?

Yes, and it's often the best answer. Islands over the areas where people gather and conversation matters, baffles across the wider open floor where you need volume absorption. They can be colour-matched so the scheme reads as one thing.

Do islands and baffles work without a suspended ceiling?

That's exactly what they're for. Both hang directly from the soffit, so you can leave services exposed, retain a feature ceiling or keep the height in the space while still dealing with the acoustics.

Are acoustic rafts, islands and canopies the same thing?

Pretty much! Raft, island and canopy are used interchangeably in the UK for horizontal free-hanging acoustic units. Manufacturers differ in which term they use - Rockfon call them islands, while Knauf group them as rafts and canopies. Baffles are different though: those hang vertically, and the term is consistent across manufacturers

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