Class A acoustic performance. Comfortable, quiet living – from the ground up.
Our Sisalwool 100 slabs have been independently tested to EN ISO 11654:1997 and achieved a Class A sound absorption rating — the highest possible level. That means exceptional acoustic performance for homes, offices, and public spaces, all while using safe, sustainable natural fibres.
What Is Acoustic Performance?
Acoustic performance refers to how well a material or building element controls sound, either by absorbing, blocking, or reducing the transmission of noise. In insulation, it specifically relates to the material’s ability to:
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Absorb sound (reducing echo and reverberation inside a room)
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Prevent sound from travelling through walls, floors, or ceilings (ie from one room to another)
Naturally Sound-Absorbing
The dense, fibrous structure of our natural Sisalwool blend traps sound waves, helping to absorb airborne noise, echoes, and reverberation across a wide range of frequencies.
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Superior sound-dampening between rooms
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Ideal for timber frame or partition walls
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Perfect for floors, ceilings, and multi-storey homes
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Use anywhere you want a quieter, calmer living
And you can have some fun with it - leave the slabs open to the room for a natural aesthetic or statement wall - we’ve even had people use them as cushions for benches in large open plan spaces!
What This Means for Your Home or Project
Modern homes often have poor internal soundproofing. 1990s homes were typically built with cost efficiency in mind, which leads to significant noise transfer between rooms and floors. Acoustic comfort just wasn’t a priority and the focus was more on external noise.
Whether you’re building a new home, retrofitting a cottage, or soundproofing between flats, acoustic insulation is essential to wellbeing and comfort. Sisalwool’s dense fibre structure helps absorb airborne sound — reducing echo, lowering background noise, and improving indoor quality of life.
Sisalwool fits easily into retrofit applications, friction fitting into existing wall cavities, joists or suspended floors with minimal disruption (great for anyone renovating and not wanting to completely gut the property!)
