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 Torf Acoustic Panel

Name: SilentRoot Torf Acoustic Panel
Brand: SilentFiber

EPD availableWallCeiling

Description

SilentRoot Torf Acoustic Panel is a sustainable wall and ceiling panel made from surface peat. Available in four thicknesses (20 / 30 / 40 / 50 mm) and several standard formats — 594 × 594 mm (Square), 1194 × 594 mm (Rect) and 1500 × 594 mm (Wave) at 20 mm, Ceiling Sail 1200 × 1800 mm at 40 mm; all thicknesses also available as custom format up to 2400 × 1200 mm, with freeform cutting and printing. Acoustically, the line covers the entire DIN EN ISO 11654 absorption-class range: αw 0.50–0.85 (Class D to B) when mounted directly, and up to αw 1.00 (Class A) with a 50–700 mm rear ventilation gap. The mounting configurations are documented in accredited ISO 354 test reports issued by Akustikverkstan Sweden.

Technical data

Material: Peat-fibre acoustic panel made from surface peat

Surface: matt, porous fibre face, seven standard colours

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

Application: Wall and ceiling mounting, also suitable for damp rooms

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 air gap	Direct mounting with 7.9 in rear ventilation gap	NRC0.85
16 in air gap	Direct mounting with 16 in rear ventilation gap	NRC0.80
28 in air gap	Direct mounting with 28 in rear ventilation gap	NRC0.80
3.9 in air gap	Direct mounting with 3.9 in rear ventilation gap	NRC0.80
2 in air gap	Direct mounting with 2 in rear ventilation gap	NRC0.70
0 in (directly on rigid backing)	Direct mounting (wall or 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 Torf Acoustic Panel: 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 · 0 mm (directly on rigid backing) · Direct mounting (wall or 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 air gap · Direct mounting with 50 mm rear ventilation gap	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 air gap · Direct mounting with 100 mm rear ventilation gap	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 air gap · Direct mounting with 200 mm rear ventilation gap	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 air gap · Direct mounting with 400 mm rear ventilation gap	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 air gap · Direct mounting with 700 mm rear ventilation gap	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 · 0 mm (directly on rigid backing) · Direct mounting (wall or 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 air gap · Direct mounting with 50 mm rear ventilation gap	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 air gap · Direct mounting with 100 mm rear ventilation gap	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 air gap · Direct mounting with 200 mm rear ventilation gap	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 air gap · Direct mounting with 400 mm rear ventilation gap	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 air gap · Direct mounting with 700 mm rear ventilation gap	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 · 0 mm (directly on rigid backing) · Direct mounting (wall or 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 air gap · Direct mounting with 50 mm rear ventilation gap	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 air gap · Direct mounting with 100 mm rear ventilation gap	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 air gap · Direct mounting with 200 mm rear ventilation gap	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 air gap · Direct mounting with 400 mm rear ventilation gap	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 air gap · Direct mounting with 700 mm rear ventilation gap	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 · 0 mm (directly on rigid backing) · Direct mounting (wall or 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 air gap · Direct mounting with 100 mm rear ventilation gap	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 air gap · Direct mounting with 200 mm rear ventilation gap	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 air gap · Direct mounting with 400 mm rear ventilation gap	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 air gap · Direct mounting with 700 mm rear ventilation gap	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