top of page
Baswa acoustic
Plaster

BASWA Phon Classic Top | Ultra-Smooth 0.3 mm Seamless Acoustic Plaster
 

Arthur Acoustics provides specialist specification and certified UK installation of BASWA Phon Classic Top, the smoothest and most refined acoustic plaster finish in the entire BASWA portfolio. Using a microscopic 0.3 mm marble aggregate applied over a multi-coat plaster build-up, BASWA Phon Classic Top achieves near-glass smoothness alongside Class A sound absorption, eliminating disruptive echo without visible joints, tiles, or grids.

Why Architects and Specifiers Choose BASWA Phon Classic Top
 

When ultra-minimalist architecture, critical grazing light, or historic conservation demands an impeccably flat, virtually grain-free surface, BASWA Phon Classic Top delivers the pinnacle of acoustic plaster craftsmanship.

  • Ultra-Fine 0.3 mm Marble Aggregate. Hand-trowelled with a microscopic 0.3 mm marble-sand grain, creating an exceptionally smooth, refined finish that rivals skim-coated gypsum plaster.

  • Precision Multi-Coat Flatness. Built up across multiple specialist plaster layers to eliminate substrate undulations and perform flawlessly under harsh architectural wall-washing and recessed lighting.

  • Seamless Monolithic Continuity. Spans flat ceilings, vaulted arches, domes, and curved walls cleanly with zero expansion joints or visible panel lines.

  • Invisible Speaker Integration. Fully compatible with plastered-in speakers, allowing high-performance multi-room audio and cinema systems to remain completely hidden beneath the plaster surface.

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

  • Non-Combustible & Eco-Certified. 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 Top System Works

​

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 curing, an ultra-fine finishing coat of 0.3 mm BASWA Top marble plaster is meticulously applied to create a velvety, microporous finish. Sound waves pass effortlessly through the microscopic pores of the 0.3 mm surface and are absorbed within the backing panel, while the sealed rear build-up prevents dust-tracking and panel telegraphing over the life of the building.

 

Technical Specifications & Acoustic Performance

​

BASWA Phon Classic Top is engineered across four system profiles to meet exact architectural and acoustic 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. Multi-coat microporous marble-sand aggregate with an ultra-fine 0.3 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 Top

​

As the premier ultra-smooth system in the BASWA range, BASWA Phon Classic Top is specified for flagship projects across the UK:

  • Super-Prime Private Residences. Delivers tranquil, echo-free living spaces, double-height reception halls, and private listening rooms without compromising minimalist interiors.

  • Heritage & Grade I/II Listed Buildings. Sensitively integrates thin-profile 30 mm and 40 mm acoustic systems into historic ceilings and ornate interiors requiring an ultra-smooth traditional finish.

  • Museums, Art Galleries & Cultural Landmarks. Provides an unobtrusive, museum-grade ceiling plane that complements gallery lighting and curated collections.

  • Flagship Boardrooms & Luxury Hospitality. Enhances speech clarity and acoustic comfort in executive suites, private members' clubs, and destination restaurants.

 

Nationwide Installation by Certified BASWA Craftsmen

​

Arthur Acoustics manages every stage of your BASWA Phon Classic Top project, from NBS specification and CAD detailing 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.

 

Order a Sample or Book a Showroom Visit

​

Inspect the ultra-smooth 0.3 mm finish of BASWA Phon Classic Top firsthand and compare it alongside our 0.5 mm Fine and 0.7 mm Base grades. 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.

 

bottom of page