TriSound Door Cores

The TriSound dB+ Acoustic Door Core is supplied as 3-ply core material with cork outer layers sized at a nominal 2000 x 800mm plan size. It requires making up into a door blank by adding timber perimeter and Chipboard or MDF substrates.

Once complete, the door blank can then be trimmed, lipped and faced to make a door.

TriSound dB+ has been tested rigorously for both fire and acoustic performance, achieving 30 minute fire rating, in accordance with BS476 part 22, to well over standard leaf sizes and up to Rw43dB sound attenuation when tested to BS EN ISO 717-1:1997. Cold Smoke seal requirement to BS476 part 31 comes as standard with every seal combination.


  • Acoustically tested up to Rw43dB (Glazed single leaf)
  • Fully tested including glazing and pairs, for both Fire and Acoustic performance
  • 30 minute fire rating - Download Quick Guide .pdf for details
  • Can be manufactured to incorporate various door designs and configurations
  • Lightweight (Around 550Kg/m3)
  • Stable construction - Extruded core
  • Durable fixing - Up to 90mm timber perimeter on all sides
  • Flexible and will not distort in storage or production
  • Standard Seals - Easy to integrate into current production
  • Retro fit possible (leaf & seals) into standard frame for 54mm door
  • Practical and easy to turn into a beautiful performance door/doorset


Nominal 2000 x 800mm plan size Nominal thickness 54mm - Standard size