Manufacturer

LIGNOTREND Produktions GmbH

LIGNOTREND manufactures cross-laminated timber building elements and solid-wood acoustic panels in Weilheim-Bannholz (Black Forest). In the LIGNO® Akustik light, Sport and home acoustic range, exposed surfaces in native softwood and hardwood are combined with integrated wood-fibre absorbers. All acoustic panels are tested to DIN EN ISO 354 / DIN EN ISO 11654 (more than 100 BAE reports) and approved under European Technical Assessment ETA-21/0360 (ETA-Danmark) as well as the German national technical approval Z-9.1-555. Sustainability credentials: natureplus 0211-0606-014-1, PEFC/04-31-2893, QNG certificate of conformity, IBR test seal (Institut für Baubiologie Rosenheim), DGNB Navigator codes OZ5NI5 / D06GD.

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LIGNO® Akustik light Ceiling Raft

LIGNO Akustik light Ceiling Raft

Free-hanging

Description

LIGNO® Akustik ceiling rafts are free-hanging acoustic elements made from real wood that take effect exactly where they are needed most. Instead of cladding an entire ceiling, the rafts float as design islands above individual zones in the room. They are typically used above workstations in open-space offices, above meeting and conference tables, in reception areas, bistros, and above dining tables in upscale residential construction. The rafts reduce reverberation precisely where people talk to each other, noticeably improving speech intelligibility and creating a calmer acoustic in open floor plans. Structurally, the ceiling rafts follow the LIGNO® principle: a real wood surface with an integrated wood-fibre absorber as standard, without MDF. The rafts can be combined in different formats and wood species, blending into both restrained office landscapes and more expressive interior architectures.

Technical data

Material: Cross-laminated timber (CLT) 3S_33 / 3G_33 / 3C_33 / 3S_39 with a wood-fibre absorber in the middle layer
Up to fire class: D-s2,d0 — D-s2-d0 per ETA-21/0360
Application: Targeted room acoustics above workstations, dining tables, conference rooms, lounges, restaurants
Certifications: PEFC/04-31-2893, IBR test seal, DGNB Navigator OZ5NI5 / D06GD, ETA-21/0360

Measurement data

Sound absorption

Reverberation chamber (ASTM C423 / ISO 354)· 4 variants

Choose mounting setup

NRC
0.70

Frequency values

αp per octave band

f (Hz)1252505001k2k4k
αp0.200.500.650.750.850.75

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CompareValue
NRC0.70
NRC0.65

Test report: TD LIGNO Akustik light Seite 42 (BAE-getestet)

NRC: 0.70 (derived from ISO 354 lab data)

Institute: Lignotrend datasheet declaration (BAE Fiedler reverberation room Wächtersbach)

Measurement date: 2025-07-28

Absorber: without additional insulation

Distance: Suspension 7.9 in

Terms of use
Measured values as a table (4 measurements)

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