Why Architects and Specifiers Choose BASWA Phon Classic Base

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Large-scale architectural spaces featuring glass, stone, and exposed concrete often suffer from harsh echo and poor speech intelligibility. BASWA Phon Classic Base uses a proven two-coat plaster build-up to achieve superior planar accuracy and mechanical toughness across demanding environments.

• Two-Coat Planar Precision. Applying a dedicated base plaster layer beneath the final finish coat corrects minor substrate variations and delivers exceptional flatness across sweeping ceilings and walls.

• Robust 0.7 mm Marble Aggregate. Finished with a 0.7 mm marble-sand grain, providing enhanced surface durability for high-traffic commercial and public buildings.

• Seamless Architectural Continuity. Covers flat soffits, vaulted arches, domes, and curved geometries across vast spans without unsightly expansion joints.

• Custom Colour Tinting. Available in crisp architectural white (~NCS S 0500-N) or tinted to match virtually any RAL or NCS colour palette without compromising acoustic performance.

• Certified Fire Safety & Sustainability. Carries a Euroclass A2-s1, d0 non-combustible fire rating, is 100% VOC-free, and supports BREEAM and LEED sustainability targets.

 

How the BASWA Phon Classic Base System Works

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Our accredited Arthur Acoustics craftsmen bond high-density, microporous mineral wool panels directly to solid concrete or plasterboard substrates. Once the panel joints are grouted and precision-sanded flat, our team hand-trowels a foundational layer of BASWA Base plaster across the entire surface.

After drying, a second finishing coat of 0.7 mm BASWA Base marble plaster is hand-applied to create a seamless, microporous skin. Sound waves pass effortlessly through the open pores of the two-coat finish and are absorbed within the backing panel, while the airtight rear construction prevents dust-tracking and panel telegraphing over time.

 

Technical Specifications & Acoustic Performance

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BASWA Phon Classic Base is engineered across four system depths to meet exact architectural and reverberation control requirements:

• System Thicknesses. Available in 30 mm, 40 mm, 50 mm, and 70 mm profiles.

• Sound Absorption Performance. Certified Class A sound absorption with Noise Reduction Coefficient (NRC) ratings from 0.80 up to 1.00, depending on system depth and mounting configuration.

• Surface Finish. Two-coat microporous marble-sand aggregate with a 0.7 mm grain diameter.

• Fire Classification. Euroclass A2-s1, d0 (non-combustible) to EN 13501-1.

• Humidity Resistance. Suitable for damp environments and indoor swimming pool halls up to 90% relative humidity.

 

Ideal Applications for BASWA Phon Classic Base

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With its two-coat flatness and durable 0.7 mm finish, BASWA Phon Classic Base is ideally suited to:

• Commercial Atriums & Open-Plan Offices. Controls reverberation and improves speech clarity across expansive ceiling spans.

• Universities, Schools & Libraries. Provides a tough, low-maintenance acoustic finish engineered for busy educational spaces.

• Museums, Galleries & Public Venues. Delivers seamless architectural lines across large galleries, auditoriums, and concourses.

• Swimming Pools & Leisure Suites. Resists high humidity while taming harsh reflections from water and tiled surfaces.

 

Nationwide Installation by Certified BASWA Craftsmen

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Arthur Acoustics manages every stage of your BASWA Phon Classic Base project, from initial acoustic calculations and NBS specification support through to substrate preparation and final hand-trowelled finishing. Operating from our Henlow Specification Centre on the Bedfordshire and Hertfordshire border and our St Albans office, we install seamless acoustic plaster systems across London, Cambridge, Oxford, Manchester, and throughout the United Kingdom.

 

Order a Sample or Book a Showroom Visit

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Compare the 0.7 mm finish of BASWA Phon Classic Base alongside our finer 0.5 mm and 0.3 mm systems. Contact our technical team to request a physical sample box or arrange a consultation at our Henlow showroom.

Call us on 01462 534610 or email baswa@arthuracoustics.co.uk to speak with an acoustic specialist.