BASWA Natural | Sustainable Hemp-Fibre Seamless Acoustic Plaster
Arthur Acoustics provides specialist specification and certified UK installation of BASWA Natural, an eco-engineered seamless acoustic plaster system crafted from sustainably grown hemp fibres and recycled glass granulate. Designed for environmentally conscious architecture, BASWA Natural achieves over 50% lower embodied CO₂ per square metre compared to conventional mineral wool acoustic ceilings while delivering broadband sound absorption and a refined, hand-trowelled marble-sand finish without visible joints or tiles.
Why Architects and Specifiers Choose BASWA Natural
Low-carbon buildings and healthy interiors require materials that minimise embodied emissions without sacrificing acoustic comfort or architectural elegance. BASWA Natural pairs renewable agricultural fibres with Swiss acoustic engineering to meet strict sustainability targets.
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Sustainably Grown Hemp Fibre Core. Manufactured using regional hemp cultivated without herbicides, pesticides, or synthetic fertilisers, significantly reducing embodied carbon.
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Recycled Glass & Natural Marble Components. Pre-coated with open-pored recycled glass granulate and finished with microporous natural marble-sand plasters.
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Flexible Across Curved & Vaulted Geometries. Adapts effortlessly to domes, groin vaults, barrel ceilings, and sweeping curves as well as flat ceilings and upper wall planes.
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Choice of Single or Two-Coat Finishes. Available in BASWA’s signature 0.7 mm Base, 0.5 mm Fine, and 0.3 mm Top marble textures in crisp architectural white (~NCS S 0500-N) or bespoke RAL and NCS colours.
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Healthy Indoor Air & Green Building Credits. Rated A+ under French VOC regulations, completely solvent-free and formaldehyde-free, and contributes directly towards BREEAM and LEED credits.
How the BASWA Natural System Works
Our accredited Arthur Acoustics craftsmen bond high-density BASWA Natural hemp-fibre panels directly to concrete soffits or conventional plasterboard substrates. Once the panel joints are filled and precision-sanded flat, our team applies either a single-coat or two-coat (Classic) build-up of microporous marble-sand plaster.
Sound waves pass freely through the microscopic pores of the marble surface and are absorbed within the randomly spun natural hemp layer behind. The sealed rear construction prevents air circulation through the panel, protecting the finished ceiling from dust staining and panel telegraphing over time.
Technical Specifications & Acoustic Performance
BASWA Natural is engineered across two slim profiles to balance embodied carbon reduction with reliable acoustic control:
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System Thicknesses. Available in 30 mm and 40 mm profiles (single-coat or two-coat Classic application).
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Sound Absorption Performance. Certified Class B sound absorption up to αw 0.80 (0.70 to 0.80 NRC depending on system thickness, cavity depth, and finish).
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Surface Finish Options. Available in 0.7 mm (Base), 0.5 mm (Fine), or 0.3 mm (Top) natural marble aggregate.
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Fire Classification. Euroclass B-s1, d0 to BS EN 13501-1.
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Indoor Air Quality & Embodied Carbon. French VOC Class A+, Indoor Air Comfort GOLD certified, and 51% lower CO₂ footprint per m² than mineral wool equivalents.
Ideal Applications for BASWA Natural
Combining renewable materials with seamless plaster aesthetics makes BASWA Natural an ideal choice for:
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Eco-Conscious Private Residences. Delivers tranquil, echo-free living spaces while supporting low-carbon, healthy home design principles.
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Heritage & Listed Buildings. Pairs natural, breathable-look hemp and marble materials sensitively with historic architecture and vaulted ceilings.
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Sustainable Commercial Offices & Cultural Venues. Helps project teams meet strict BREEAM, LEED, and net-zero embodied carbon benchmarks.
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Schools, Nurseries & Healthcare Environments. Provides a non-toxic, VOC-free acoustic ceiling solution that enhances speech clarity and occupant wellbeing.
Nationwide Specification & Installation by Arthur Acoustics
Arthur Acoustics manages every stage of your BASWA Natural project, from embodied-carbon and NBS specification support through to substrate preparation and master hand-trowelled finishing. Operating from our Henlow Specification Centre on the Bedfordshire and Hertfordshire border and our St Albans office, our installation teams serve projects across London, Cambridge, Oxford, Manchester, and throughout the United Kingdom.
Technical Specifications
Feature
System Thickness
Fire Classification
Finish Options
Standard Colour
Customisation
Light Reflectance
Details
30mm or 40 mm
B-s1, d0 (DIN EN 13501-1)
Base (0.7mm), Fine (0.5mm), or Top (0.3mm)
NCS S 0500-N (High whiteness, L-value 92%)
Unlimited colour selection (RAL, NCS)
Average L-Value of 0.91 (ASTM E1477)
Order a Sample or Book a Showroom Visit
Inspect the natural hemp-fibre panel and compare our 0.7 mm, 0.5 mm, and 0.3 mm marble finishes firsthand. Contact our technical team to request a physical sample box or book a consultation at our Henlow showroom.
Call us on 01462 534610 or email baswa@arthuracoustics.co.uk to speak with an acoustic specialist.
