BASWA Phon Base | Seamless, High-Durability Acoustic Plaster Systems

 

Why Architects and Specifiers Choose BASWA Phon Base

​

Modern interiors built with glass, stone, and exposed concrete often suffer from excessive echo and poor speech clarity. BASWA Phon Base absorbs unwanted reverberation across large surfaces while offering practical advantages for demanding construction schedules.

• Efficient Single-Coat Application. Unlike multi-coat systems, BASWA Phon Base uses a precision hand-trowelled single coat over pre-coated acoustic panels, reducing on-site installation times.

• Enhanced Surface Resilience. With a 0.7 mm marble aggregate grain size, this system produces a robust, finely structured finish that offers greater mechanical resistance than finer plaster grades.

• Monolithic Visual Continuity. Covers flat ceilings, walls, domes, and vaulted structures seamlessly across vast spans without unsightly expansion joints.

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

• Certified Fire Safety and Sustainability. Carries an A2-s1, d0 non-combustible fire rating, is completely VOC-free and solvent-free, and supports BREEAM and LEED sustainability targets.

 

How the BASWA Phon Base System Works

​

Our certified installation teams bond high-density, microporous mineral wool panels directly to solid concrete or conventional plasterboard substrates. Once the panel joints are grouted and precision-sanded flat, our craftsmen hand-apply a single layer of microporous BASWA Base marble plaster.

Sound waves pass effortlessly through the open pores of the 0.7 mm marble finish and are absorbed within the acoustic backing board. The airtight construction prevents air movement through the system, protecting the ceiling from dust staining and panel telegraphing over time.

 

Technical Specifications & Acoustic Performance

​

BASWA Phon Base is available in 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. Achieves 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. Finely textured microporous marble 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 Base

​

Because of its durable 0.7 mm finish and fast single-coat turnaround, BASWA Phon Base is ideally suited to:

• Commercial Offices & Atriums. Improves speech intelligibility and acoustic comfort in open-plan workspaces, reception areas, and boardrooms.

• Education, Galleries & Museums. Controls reverberation across expansive ceilings while keeping maintenance straightforward.

• Hospitality & Luxury Residential Spaces. Delivers calm, refined acoustics in restaurants, open-plan living areas, and home cinemas, with full compatibility for invisible plastered-in speakers.

• Swimming Pools & Wellness Suites. Resists high humidity while taming harsh water and tile reflections.

 

Nation-Wide Installation by Certified BASWA Installers

​

As accredited BASWA Phon installers, Arthur Acoustics manages every stage of your project—from initial acoustic specification and CAD detailing through to substrate preparation and final hand-trowelled finishing. Operating from our Henlow Specification Centre on the Bedfordshire and Hertfordshire border and our Henlow office, we install seamless acoustic plaster systems across London, Cambridge, Oxford, Manchester, and throughout the United Kingdom.