Sonatherm acoustic thermal insulation

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Acoustic thermal insulation with a seamless and decorative finish

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Sonatherm is a seamless, acoustic thermal insulation system for basement car parks, cantilever buildings, balconies, soffits of walkways and underpasses.  Sonatherm acoustic thermal insulation consists of foil-faced mineral wool slabs over-sprayed with a choice of SonaSpray acoustic spray finishes (see separate SonaSpray fc, SonaSpray K-13 special and SonaSpray K-13 standard products for details) to achieve a fire rating and aesthetic appearance.

View SonaSpray range

By varying the thickness of the mineral wool slabs all permutations of acoustic thermal insulation are achieved.  The layer of SonaSpray also means that any sound is absorbed rather than being reflected, considerably reducing reverberation times and therefore reducing overall noise levels within the space.

Sonatherm acoustic thermal insulation

Features and benefits of Sonatherm acoustic thermal insulation

  • Suitable for thermal acoustic sound insulation. Reconstruction of a building may necessitate the removal of the SonaSpray and mineral wool slabs components of Sonatherm. The SonaSpray component can be recycled or disposed of as a non-special waste to landfill.
  • Sonatherm acoustic thermal insulation is Building Regulations (E&W) Approved Document E compliant.
  • Thermal insulation with reverberation noise reduction.
  • Spray applied, one coat, decorative, thermal insulation finish with foil-faced mineral wool slabs substrate.
  • Seamless monolithic ceiling.

Acoustic thermal insulation installations

Sonatherm - Acoustic thermal insulation for ceilings and walls

Sonatherm - Acoustic thermal insulation for ceilings and walls

Sonatherm - Acoustic thermal insulation for ceilings and walls

Sonatherm - Acoustic thermal insulation for ceilings and walls

Other acoustic thermal insulation applications

Sonatherm thermal acoustic insulation can also be used for the soffits of walkways, underpasses and balconies.  In any area where it is protected from direct rain, architects can employ the insulating and acoustic properties of Sonatherm to the full.

Recyclable, low embodied energy & good for the environment

Sonatherm is perfect for thermal acoustic sound insulation.  Reconstruction of a building may necessitate removal of the SonaSpray and EPS components of Sonatherm.  The SonaSpray component can be recycled or disposed of as a non-special waste to landfill.

Technical specification

  • Acoustic thermal insulation suitable for application to most surfaces or constructions and is suitable for basement car parks, cantilever buildings and balconies.
  • The acoustic thermal insulation system can also be used for the soffits of walkways, underpasses and balconies.
  • In any area where it is protected from direct rain.

Acoustic thermal insulation spray application by Oscar Acoustics trained in-house teams.  Mineral wool boards installed by others.

Fire rating

*Applies for the SonaSpray element only*

B-s1,d0 & Class 0 to BS476 - significantly betters the requirements of the new Approved Document B providing little to no smoke and absolutely no droplets, assisting in the safe escape of occupants. 


Various decorative and seamless sprayed coating.



Thermal insulation


Acoustic performance

Excellent acoustics achieved without design compromise.

Environmentally friendly

Cellulose fibres, fully recycled, low embodied energy, low C02.  Can effectively lower the carbon footprint of a building project by sequestering rich stores of carbon for the life of the structure or application.


*Applies for the SonaSpray element only*

  • M1 emission class certified for building materials (best class).
  • Compliant with CDPH/CA Section 01350.
  • GREENGUARD Gold Certified for Indoor Air Quality.
  • BREEAM rating system HEA Indoor Air Quality.
  • WELL Building Standard®.
Environmental standards

*Applies for the SonaSpray element only*

  • Environmental Product Declaration in accordance with ISO 14025 - EN 15804.
  • Living Building Challenge compliant.
  • LEED.
  • SKA.
Repairing & servicing Sonatherm

Local repairs of small areas are performed by hand.  A wall or a ceiling can be entirely over sprayed in the same or a different colour.  It is also possible to spray with a water based paint - please contact our Oscar Acoustics technical department for further details.

Dust can be removed by blowing with an air pressure gun or by vacuuming with a soft brush attachment.

Thermal properties

Sonatherm 70/20 - construction - Thermal Acoustic Insulation - Typical Calculation

Typical "R" Values
Internal surface 0.14
50mm screed 0.03
150mm concrete slab 0.10
External Surface 0.04
U=3.23 W/m2k R=0.31
70mm EPS 20 SE 1.94
20mm Sonaspray 0.62
U=0.35 W/m2k R=2.87
Qualities and colours

There is a choice of finish for the sprayed-on Sonatherm layer:

SonaSpray K-13 special is available as standard in colours: Light grey, beige, off white and black (blues and greens often available as standard).
Sonaspray fc is available in white as standard.
Almost any colour is possible if the size of the project warrants this option.

Contact us

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