Available in two configurations acoustic and thermal Terrafloor A1 fire rated insulation is pivotal in flooring designs to ensure energy efficiency in a new build alongside Terrawool’s staple of fire resistance, water resistance, thermal performance and acoustic performance.

Fire performance

Terrafloor slabs have been tested to BS EN 1363-1 and are A1 fire rated to offer fire protection to all common floor applications.

Thermal performance

Thermal Terrafloor Slab has a thermal conductivity (k value) of 0.039 W/mK.

Thermal resistance of tissue faced Thermal Terrafloor Slab:

  • 50mm Thermal Terrafloor Slab: 1.28 m²K/W
  • 80mm Thermal Terrafloor Slab: 2.05 m²K/W
  • 100mm Thermal Terrafloor Slab: 2.56 m²K/W

Acoustic Terrafloor Slab has a thermal conductivity (k value) of 0.040 W/mK.

Thermal resistance of tissue faced Acoustic Terrafloor Slab:

  • 25mm Acoustic Terrafloor Slab: 0.63 m²K/W
  • 30mm Acoustic Terrafloor Slab: 0.75 m²K/W
  • 50mm Acoustic Terrafloor Slab: 1.25 m²K/W

Technical information

Terrawool Terrafloor Slabs achieve a reaction to fire classification of A1 – BS EN 13501-1.


Terrawool Soffit Slabs are chemically inert and compatible with most materials with which they are likely to come into contact in normal building applications.

More Information

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