BASWA Natural

Name: BASWA Natural
Brand: BASWA acoustic AG

NRC 0.65–0.95

EPD availableCeilingWall

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Manufacturer

BASWA acoustic AG

BASWA acoustic AG, Marmorweg 10, 6283 Baldegg (Canton of Lucerne), Switzerland, has been making seamless acoustic systems for more than 30 years, with production in Baldegg. Its subsidiary BASWA acoustic Deutschland GmbH is based in Düsseldorf; in North America the systems are supplied through BASWA acoustic North America in Cleveland, Ohio, and worldwide through partners. Acoustic panels are bonded or fixed and coated with microporous plasters made with marble sand, so the finished ceiling or wall looks like plaster. The system families are BASWA Phon (glass wool panel), BASWA Natural (hemp fiber panel), BASWA Basic (panel of expanded recycled glass granulate), BASWA Cool (with integrated capillary tubes for heating and cooling), BASWA Core (for concrete core activation) and BASWA DTG (fixed directly to a metal grid), with the finishes Base, Fine and Top as well as Casual and One. The systems are installed only by applicators trained and certified by BASWA, and a cleaning, repair and renovation concept covers the surfaces.

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Documents

EPD LEED documentation Fire behaviour BASWA Natural Declaration of Performance BASWA Natural Planning documents BASWA Natural (EN)Emissions test Indoor Air Comfort GOLD Product datasheet BASWA Natural acoustic panel (EN)

Description

BASWA Natural is a seamless acoustic plaster system on a natural fiber panel. Hemp fiber acoustic panels with a pre-coating of recycled glass granulate are bonded to the ceiling or wall, sanded flat and coated with microporous BASWA plasters made with marble sand. The hemp is grown without herbicides, pesticides or fertilizers. Available as single-coat and two-coat systems. The two-coat systems (Classic) are used on curved surfaces and where light grazes the surface. For horizontal, inclined and vertical ceilings and walls as well as vaults, domes and other single or double curved and organic shapes, in projects that call for a renewable base material.

Technical data

Material: Hemp fiber panel pre-coated with recycled glass, 31 × 24 in

Surface: Grain size 0.01 to 0.03 in, surface quality Q2 to Q3

Fire class (EN 13501-1): B-s1,d0

Certifications: EPD, Indoor Air Comfort GOLD, VOC class A+, LEED compliant

Colours: Standard color NCS S 0500-N, unlimited choice of colors

Measurement data

Sound absorption

Reverberation chamber (ASTM C423 / ISO 354)· 24 variants

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NRC

0.75

Frequency values

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		Value
Directly on the substrate, no cavity	Fine	NRC0.75
Directly on the substrate, no cavity	Classic Base	NRC0.75
Suspension 7.9 in	Classic Base	NRC0.75
Directly on the substrate, no cavity	Classic Fine	NRC0.75
Directly on the substrate, no cavity	Classic Top	NRC0.75
Suspension 7.9 in	Classic Top	NRC0.75
Directly on the substrate, no cavity	Base	NRC0.70
Suspension 7.9 in	Base	NRC0.70
Suspension 7.9 in	Fine	NRC0.70
Suspension 7.9 in	Classic Fine	NRC0.70

Test report: 82606-SRL-RP-XT-004-P1

NRC: 0.75 (derived from ISO 354 lab data)

Institute: Sound Research Laboratories, Sudbury (UK)

Measurement date: 07/15/2025

Room volume: 10,598 cu ft

Object area: 116 sq ft

Surface: Fine

Measured values as a table (24 measurements)

BASWA Natural: sound absorption coefficient αs per ISO 354 by frequency and test build-up
Build-up	NRC	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
1.2 in · Directly on the substrate, no cavity · Base	0.70	0.07	0.15	0.14	0.20	0.28	0.40	0.59	0.78	0.86	0.93	0.98	0.98	0.90	0.81	0.72	0.66	0.64	0.70
1.2 in · Suspension 7.9 in · Base	0.70	0.24	0.25	0.27	0.39	0.39	0.37	0.44	0.63	0.74	0.87	0.94	0.94	0.90	0.79	0.69	0.63	0.59	0.62
1.6 in · Directly on the substrate, no cavity · Base	0.80	0.09	0.15	0.19	0.31	0.43	0.56	0.78	0.93	1.09	1.11	1.04	1.07	0.98	0.88	0.79	0.81	0.84	0.90
1.6 in · Suspension 7.9 in · Base	0.85	0.45	0.41	0.40	0.41	0.44	0.55	0.72	0.90	1.03	1.04	1.06	1.03	0.97	0.91	0.83	0.74	0.83	0.90
2 in · Directly on the substrate, no cavity · Base	0.90	0.19	0.21	0.29	0.44	0.63	0.86	0.99	1.07	1.12	1.08	1.02	0.99	0.89	0.89	0.87	0.92	0.93	0.85
2 in · Suspension 7.9 in · Base	0.85	0.49	0.41	0.45	0.50	0.57	0.67	0.85	0.99	1.05	1.04	1.00	0.96	0.90	0.84	0.86	0.92	0.91	0.81
2.8 in · Directly on the substrate, no cavity · Base	0.95	0.26	0.34	0.51	0.80	0.91	1.10	1.16	1.11	1.09	0.98	0.91	0.90	0.87	0.94	0.91	0.89	0.89	0.87
2.8 in · Suspension 7.9 in · Base	0.90	0.52	0.51	0.59	0.63	0.70	0.93	1.02	1.11	1.05	1.03	0.95	0.89	0.88	0.89	0.92	0.87	0.88	0.83
1.2 in · Directly on the substrate, no cavity · Fine	0.75	0.09	0.10	0.17	0.24	0.41	0.62	0.76	0.83	0.90	0.92	0.86	0.87	0.84	0.81	0.75	0.71	0.68	0.67
1.2 in · Suspension 7.9 in · Fine	0.70	0.49	0.37	0.34	0.35	0.37	0.41	0.57	0.75	0.83	0.85	0.86	0.84	0.80	0.77	0.73	0.66	0.62	0.58
1.6 in · Directly on the substrate, no cavity · Fine	0.75	0.15	0.17	0.21	0.40	0.59	0.82	0.88	0.90	0.97	0.91	0.83	0.82	0.80	0.74	0.68	0.69	0.69	0.73
1.6 in · Suspension 7.9 in · Fine	0.70	0.50	0.40	0.39	0.33	0.43	0.61	0.75	0.85	0.90	0.89	0.86	0.81	0.77	0.70	0.65	0.59	0.63	0.62
1.2 in · Directly on the substrate, no cavity · Classic Base	0.75	0.07	0.07	0.08	0.20	0.28	0.39	0.57	0.73	0.91	0.94	0.96	1.03	1.01	1.00	0.94	0.89	0.84	0.85
1.2 in · Suspension 7.9 in · Classic Base	0.75	0.46	0.34	0.32	0.43	0.41	0.36	0.47	0.63	0.78	0.83	0.97	1.04	1.06	1.03	0.98	0.80	0.79	0.77
1.6 in · Directly on the substrate, no cavity · Classic Base	0.85	0.10	0.13	0.23	0.37	0.49	0.69	0.85	0.97	1.15	1.06	1.01	0.96	0.94	0.83	0.77	0.78	0.81	0.88
1.6 in · Suspension 7.9 in · Classic Base	0.80	0.49	0.42	0.42	0.40	0.44	0.57	0.74	0.91	1.04	1.05	1.06	0.98	0.89	0.84	0.77	0.71	0.76	0.77
1.2 in · Directly on the substrate, no cavity · Classic Fine	0.75	0.10	0.10	0.21	0.30	0.46	0.57	0.65	0.69	0.79	0.86	0.93	0.94	0.93	0.85	0.81	0.75	0.70	0.68
1.2 in · Suspension 7.9 in · Classic Fine	0.70	0.30	0.36	0.41	0.34	0.41	0.53	0.60	0.71	0.75	0.88	0.89	0.93	0.92	0.82	0.79	0.71	0.70	0.65
1.6 in · Directly on the substrate, no cavity · Classic Fine	0.80	0.15	0.19	0.40	0.45	0.59	0.75	0.75	0.86	0.89	0.88	0.91	0.86	0.82	0.81	0.75	0.70	0.72	0.66
1.6 in · Suspension 7.9 in · Classic Fine	0.75	0.31	0.46	0.51	0.47	0.56	0.69	0.77	0.83	0.85	0.88	0.89	0.88	0.83	0.75	0.73	0.69	0.70	0.67
1.2 in · Directly on the substrate, no cavity · Classic Top	0.75	0.10	0.11	0.16	0.22	0.33	0.46	0.63	0.79	0.94	0.99	0.99	1.05	1.01	0.95	0.86	0.80	0.76	0.75
1.2 in · Suspension 7.9 in · Classic Top	0.75	0.45	0.33	0.34	0.44	0.40	0.40	0.53	0.71	0.83	0.91	1.01	1.01	0.97	0.94	0.89	0.76	0.70	0.71
1.6 in · Directly on the substrate, no cavity · Classic Top	0.75	0.12	0.24	0.23	0.39	0.56	0.63	0.79	0.87	0.89	0.88	0.87	0.81	0.74	0.67	0.63	0.64	0.68	0.67
1.6 in · Suspension 7.9 in · Classic Top	0.65	0.29	0.33	0.34	0.42	0.42	0.58	0.66	0.78	0.80	0.85	0.83	0.79	0.72	0.64	0.58	0.58	0.57	0.54

Measured values as a table (24 measurements)

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Last updated: 11/03/2026

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