Manufacturer

SilentFiber

SilentFiber offers a broad portfolio of sustainable acoustic elements made from natural fibres. The product family ranges from the peat-based SilentRoot acoustic panel through the hemp-based SilentHEMP line to specialty products such as SilentSPA (wet room), SilentMOSS (moss picture) and SilentBEE (hexagon). Owner Dipl. Ing. Robert Schwemmer operates as a brand owner with selected European manufacturing partners. Custom formats and individual cutting are available from the first panel onward (max. 1.2 × 2.4 m). Awards: Green Product Award 2022, Klimaschutzpreis (Climate Protection Prize), Austrian Bauherrenpreis, Green Product Award Finalist 2026.

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EPD Fire protection M1

SilentRoot cloud Acoustic Ceiling Sail

Name: SilentRoot cloud Acoustic Ceiling Sail
Brand: SilentFiber

EPD availableFree-hangingCeiling

Description

SilentRoot cloud is the free-hanging ceiling sail based on the SilentRoot Torf acoustic panel. It is used where the structural ceiling stays visible or service runs need to remain accessible, while speech clarity is required — conference rooms, office zones, foyers, hospitality. Available in four thicknesses (20 / 30 / 40 / 50 mm) — the same material platform as SilentRoot. Maximum format 1.2 × 2.4 m, individual sizes from the first panel, freeform cutting and printing available. Acoustic values are identical to SilentRoot: αw between 0.50 and 1.00 depending on suspension height. The underlying measurements were carried out by Akustikverkstan Sweden in an accredited reverberation room per DIN EN ISO 354 + ISO 11654.

Technical data

Material: Peat-fibre acoustic panel made from surface peat, free-hanging

Surface: matt, porous fibre face, seven standard colours

Up to fire class: B-s3,d0 per EN 13501-1:2018 (low flammability)

Application: Ceiling sails over conference rooms, office zones, foyers, hospitality and event spaces

Certifications: M1 Emission Class (Rakennustieto Oy, valid until 23 Jan 2027), EPD per EN 15804+A2 (EPDHUB-0179, valid until 11 Nov 2027), REACH SVHC-free (declaration 25 Sep 2025), reproduction-toxic boron compounds < 0.1 % (declaration 22 Aug 2025)

Colours: 7 standard colours (Natural, Off-white, Black, Red, Grey, Turquoise, Orange); any RAL custom shade available except pure white

Measurement data

Sound absorption

Reverberation chamber (ASTM C423 / ISO 354)· 23 variants

Choose thickness

Datasheet 0.8 in

NRC

0.85

Frequency values

α_p per octave band

f (Hz)	125	250	500	1k	2k	4k
α_p	0.30	0.70	1.00	0.85	0.95	1.00

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		Value
7.9 in distance to the ceiling	Ceiling sail with 7.9 in distance below the structural ceiling	NRC0.85
16 in distance to the ceiling	Ceiling sail with 16 in distance below the structural ceiling	NRC0.80
28 in distance to the ceiling	Ceiling sail with 28 in distance below the structural ceiling	NRC0.80
3.9 in distance to the ceiling	Ceiling sail with 3.9 in distance below the structural ceiling	NRC0.80
2 in distance to the ceiling	Ceiling sail with 2 in distance below the structural ceiling	NRC0.70
Directly under the ceiling (0 in distance)	Ceiling sail suspended directly below the structural ceiling	NRC0.60

Test report: 17-202-M4

NRC: 0.85 (derived from ISO 354 lab data)

Institute: Akustikverkstan Sweden (accreditation no. 10126, ISO/IEC 17025)

Measurement date: 2017-08-17

Room volume: 7,063 cu ft

Object area: 108 sq ft

Measured values as a table (23 measurements)

SilentRoot cloud Acoustic Ceiling Sail: sound absorption coefficient αs per ISO 354 by frequency and test build-up
Build-up	NRC	50 Hz	63 Hz	80 Hz	100 Hz	125 Hz	160 Hz	200 Hz	250 Hz	315 Hz	400 Hz	500 Hz	630 Hz	800 Hz	1000 Hz	1250 Hz	1600 Hz	2000 Hz	2500 Hz	3150 Hz	4000 Hz	5000 Hz
20 mm · Directly under the ceiling (0 mm distance) · Ceiling sail suspended directly below the structural ceiling	0.60	0.00	0.00	0.03	0.03	0.05	0.07	0.13	0.19	0.28	0.42	0.53	0.68	0.72	0.78	0.81	0.94	0.91	1.02	1.02	1.02	1.00
20 mm · 50 mm distance to the ceiling · Ceiling sail with 50 mm distance below the structural ceiling	0.70	0.00	0.01	0.05	0.06	0.08	0.12	0.17	0.25	0.39	0.57	0.72	0.90	0.93	0.98	0.96	1.01	0.93	1.00	0.98	1.00	1.04
20 mm · 100 mm distance to the ceiling · Ceiling sail with 100 mm distance below the structural ceiling	0.80	0.02	0.04	0.09	0.12	0.15	0.25	0.27	0.41	0.62	0.82	0.94	1.04	1.07	1.06	0.98	0.92	0.87	0.97	1.00	1.01	1.03
20 mm · 200 mm distance to the ceiling · Ceiling sail with 200 mm distance below the structural ceiling	0.85	0.08	0.09	0.18	0.22	0.35	0.40	0.55	0.69	0.88	0.99	1.02	1.01	0.90	0.82	0.90	0.97	0.91	0.99	0.98	1.00	1.03
20 mm · 400 mm distance to the ceiling · Ceiling sail with 400 mm distance below the structural ceiling	0.80	0.17	0.12	0.29	0.35	0.58	0.58	0.67	0.83	0.85	0.74	0.66	0.85	0.92	0.88	0.90	0.95	0.90	0.99	1.01	1.01	1.03
20 mm · 700 mm distance to the ceiling · Ceiling sail with 700 mm distance below the structural ceiling	0.80	0.20	0.13	0.48	0.36	0.49	0.68	0.64	0.47	0.61	0.75	0.83	0.89	0.86	0.92	0.90	0.96	0.91	0.97	0.99	1.02	1.03
30 mm · Directly under the ceiling (0 mm distance) · Ceiling sail suspended directly below the structural ceiling	0.65	0.00	0.02	0.07	0.07	0.11	0.15	0.24	0.30	0.42	0.57	0.65	0.79	0.79	0.83	0.85	0.93	0.90	0.96	0.97	0.96	0.98
30 mm · 50 mm distance to the ceiling · Ceiling sail with 50 mm distance below the structural ceiling	0.70	0.00	0.04	0.07	0.08	0.11	0.17	0.24	0.31	0.44	0.63	0.74	0.85	0.85	0.87	0.87	0.95	0.90	0.96	0.95	0.97	1.02
30 mm · 100 mm distance to the ceiling · Ceiling sail with 100 mm distance below the structural ceiling	0.80	0.03	0.06	0.11	0.14	0.15	0.27	0.29	0.43	0.63	0.82	0.93	1.00	1.03	1.02	0.95	0.91	0.87	0.97	0.99	0.99	0.99
30 mm · 200 mm distance to the ceiling · Ceiling sail with 200 mm distance below the structural ceiling	0.85	0.08	0.11	0.18	0.23	0.29	0.37	0.54	0.68	0.86	0.99	0.99	0.95	0.87	0.83	0.87	0.96	0.91	0.98	0.98	0.99	1.02
30 mm · 400 mm distance to the ceiling · Ceiling sail with 400 mm distance below the structural ceiling	0.80	0.18	0.14	0.27	0.35	0.53	0.53	0.71	0.79	0.81	0.72	0.67	0.85	0.91	0.87	0.90	0.95	0.88	0.98	0.98	0.99	0.99
30 mm · 700 mm distance to the ceiling · Ceiling sail with 700 mm distance below the structural ceiling	0.75	0.23	0.16	0.46	0.34	0.44	0.62	0.60	0.45	0.57	0.72	0.83	0.88	0.86	0.91	0.90	0.95	0.89	0.97	0.99	1.01	1.01
40 mm · Directly under the ceiling (0 mm distance) · Ceiling sail suspended directly below the structural ceiling	0.75	0.00	0.03	0.06	0.06	0.11	0.21	0.29	0.36	0.52	0.72	0.77	0.86	0.93	0.89	0.92	0.93	0.93	0.96	0.98	1.01	1.08
40 mm · 50 mm distance to the ceiling · Ceiling sail with 50 mm distance below the structural ceiling	0.75	0.00	0.04	0.06	0.07	0.12	0.21	0.30	0.38	0.53	0.73	0.79	0.87	0.96	0.92	0.93	0.94	0.89	0.97	0.98	1.00	1.03
40 mm · 100 mm distance to the ceiling · Ceiling sail with 100 mm distance below the structural ceiling	0.85	0.02	0.05	0.09	0.13	0.17	0.29	0.38	0.52	0.70	0.89	0.98	1.07	1.05	1.03	0.95	0.94	0.91	0.99	1.02	1.01	1.05
40 mm · 200 mm distance to the ceiling · Ceiling sail with 200 mm distance below the structural ceiling	0.90	0.08	0.14	0.16	0.27	0.31	0.42	0.62	0.76	0.96	1.05	1.00	1.03	0.92	0.86	0.93	0.98	0.92	1.00	0.99	1.00	1.05
40 mm · 400 mm distance to the ceiling · Ceiling sail with 400 mm distance below the structural ceiling	0.85	0.15	0.13	0.27	0.46	0.54	0.56	0.72	0.82	0.92	0.82	0.73	0.96	0.96	0.92	0.94	0.95	0.92	1.00	1.02	1.02	1.03
40 mm · 700 mm distance to the ceiling · Ceiling sail with 700 mm distance below the structural ceiling	0.80	0.21	0.14	0.49	0.49	0.54	0.64	0.61	0.51	0.61	0.84	0.87	0.91	0.96	0.96	0.96	0.94	0.95	0.98	1.02	1.01	1.04
50 mm · Directly under the ceiling (0 mm distance) · Ceiling sail suspended directly below the structural ceiling	0.90	0.00	0.02	0.06	0.08	0.12	0.26	0.36	0.52	0.73	0.94	0.97	1.07	1.13	1.08	1.06	1.08	1.04	1.08	1.09	1.10	1.10
50 mm · 100 mm distance to the ceiling · Ceiling sail with 100 mm distance below the structural ceiling	1.00	0.00	0.05	0.10	0.16	0.20	0.37	0.48	0.74	0.93	1.13	1.14	1.17	1.15	1.13	1.06	1.07	1.04	1.14	1.10	1.11	1.12
50 mm · 200 mm distance to the ceiling · Ceiling sail with 200 mm distance below the structural ceiling	1.00	0.09	0.13	0.21	0.36	0.46	0.54	0.71	0.87	1.12	1.22	1.12	1.15	1.10	1.03	1.06	1.08	1.04	1.10	1.08	1.09	1.12
50 mm · 400 mm distance to the ceiling · Ceiling sail with 400 mm distance below the structural ceiling	1.00	0.17	0.13	0.34	0.56	0.72	0.69	0.83	0.93	1.05	1.02	0.92	1.10	1.10	1.06	1.06	1.06	1.04	1.11	1.09	1.08	1.12
50 mm · 700 mm distance to the ceiling · Ceiling sail with 700 mm distance below the structural ceiling	0.95	0.22	0.14	0.60	0.62	0.73	0.71	0.78	0.66	0.79	0.99	1.01	1.09	1.12	1.09	1.06	1.06	1.04	1.11	1.09	1.08	1.12

Measured values as a table (23 measurements)

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Last updated: 09/16/2026