Acosorb (Acosorb GmbH, Bocholt) develops and applies seamless acoustic spray and trowel plasters (acoustic plaster). The jointless wall and ceiling surfaces absorb sound and reduce reverberation while staying visually closed, with no visible joints, grids or cassettes. The spray plasters (Acospray range) are made of enriched, partly recycled cellulose fibres with a water-based binder and are applied in several cross-sprayed layers; Acoplaster F combines a non-combustible mineral-wool board with an acoustic-plaster top layer. Depending on layer thickness and build-up, absorption reaches up to the highest absorption class A. The materials are open to diffusion and hygroscopic (usable down to swimming pools and semi-outdoor areas), Cradle to Cradle Bronze certified and documented via an ISO 14025 EPD (MRPI) and Fraunhofer VOC verifications. Member of the DGNB. Reference projects in Germany and the Netherlands.
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Acospray DC3
Acospray DC3 is Acosorb's sustainable standard spray plaster with a coarse-grained, open-to-diffusion spray texture, made of enriched, recycled cellulose fibres and a binder. The recommended layer thickness is 10 to 50 mm; at 50 mm it reaches maximum absorption in the speech range. Tunable via layer thickness up to the highest absorption class A (αw 1.00 at 35 mm). Open to diffusion and hygroscopic, down to swimming pools and semi-outdoor areas. Weight around 1.3–1.8 kg/m² per 10 mm. Also available as a Green Line recyclate version (Billboard Grey, Apple Grey).
ISO 354 – reverberation chamber· 5 variants
αp per ISO 11654
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| Compare | Value | |
|---|---|---|
| 35 mm | αw1.00 | |
| 25 mm | αw0.75 | |
| 20 mm | αw0.60 | |
| 15 mm | αw0.55 | |
| 10 mm | αw0.45 |
Absorber class: A
NRC: 0.95
Distance: Direct (no gap)
