Product Benefits

  • Thermal-acoustic solution
  • Acoustic absorption: αw = 1
  • Thermal resistance: 2.20 m². K/W
  • 100% flat irrespective of the moisture content
  • IAQ: Class A+
  • Compatible with French thermal building regulations
  • ACERMI Certification

Caracteristics & Performance

Acoustic absorption

Tonga® Therm A 80
  • αw = 1 : class A / NRC = 1


  • Light reflection: The light reflection coefficient is more than 87% for white.
  • White: L = 94.8% - according to ISO 11664-4.
  • Gloss: Matt - The gloss value is - according to ISO 2813.
  • Light diffusion: 100% of the light is diffused.
  • Natural light intake: 6% improvement in natural light distribution.
  • Lighting needs: 11% reduction in artificial lighting needs.

Fire reaction

According to EN 13501-1: 

  • For white: Euroclass A1.
  • For colors: Euroclass A2-s1, d0.

Humidity performance

  • 100% flat irrespective of the moisture content.

Thermal resistance

    • Tonga® Therm A 80 ceilings offer thermal resistance measured according to EN 12667 and are ACERMI-certified according to EN 13162:
Thickness Thermal resistance
77 mm 2.20 m². K/W
    • Compatible with French thermal building regulations (RT 2012).

Resistance to bending

  • According to EN 13964 - Annex F, Tonga® Therm A 80 ceilings are classified as C/195N/m².
  • This value should be kept in mind if any mineral wool is to be laid in the plenum.


Environment and health


  • Mineral wool is recyclable, and the vast majority of production waste is recycled. The recycled content of our Tonga® Therm A 80 panels is 45%.
  • For projects based on LEED®, BREEAM® and HQE™ Green Building certifications, EPD (Environmental Product Declarations) are available. Contact us.
  • Eurocoustic is certified to ISO 14001: 2015 "Environmental Management Systems".


  • Eurocoustic stone wool is certified by EUCEB (EUropean CErtification Board of mineral wool product).
  • Stone wool panels are manufactured with fibers exempt from the carcinogenic classification (European Regulation 1272/2008 as amended by European Regulation 790/2009). According to the International Agency for Research on Cancer, mineral wool is not classifiable as to its carcinogenicity to humans (Group 3).

CE Marking

  • DoP no.: 0007-12 (blanc) et 0007-13 (couleurs).

Indoor Air Quality

  • Tonga® Therm A 80 products are classed A+.

Installation & Cleaning


  • Installation must conform to the requirements of the DTU 58.1 code of practice, the NF P 68203-1 and 2 standards and other applicable standards and codes of practice according to the type of room.
  • You are advised to ensure that air can circulate between the rooms and the plenum to balance the temperature and pressures on each side of the ceiling.
  • Tonga® Therm A 80 ceilings are fitted on T24 - T35 grids.
  • Tiles can be cut with a craft knife without generating any noise or dust.
  • The direction in which the panels should be installed is indicated on the back of the panels.


  • The surface of Tonga® Therm A 80 ceilings does not retain dust, which makes them easier to clean.
  • Tonga® Therm A 80 ceilings can be cleaned using light brush / vacuum cleaner.
  • This type of cleaning will help extend the service life of Tonga® Therm A 80 ceilings.

Colors & Dimensions



More details


Our commitments

Fast and flexible logistics, technical assistance, customer service: Saint-Gobain Eurocoustic accompanies you on your projects on a daily and long-term basis.

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Reinvent your ceilings with our new colors

A selection of 40 colors

6 new graphical options

Custom Colors service

Print your own visuals

Visual consistency between tiles and grids