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Fire Rated Underlayment Systems


Treadstone Launches New Elite Duo Sound Attenuation System

The Treadstone Elite Duo acoustical system delivers an astounding 61 STC/55 IIC in a system with an unparalleled thickness of just over 1”.

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Proprietary formulation brings new innovation to fire-resistive underlayments. While maintaining desired fire-resistive, non-shrinking, fast cure properties of gypsum underlayments, FR25 adds the long desired cementitious properties of high flow, high strength, and abrasion resistance.


  • Compressive strengths up to 3200psi
  • Fast Setting, light trade traffi c 1 hour, normal traffi c 24 hrs.
  • Dense, smooth surface
  • Little to no surface prep, clean, prime, and pour.
  • Provides enhanced sound attenuation (STC & IIC) between fl oors
  • Reduces Carbon Footprint
  • UL Listed in over 100 designs
  • Installed by a technically trained network of Licensed Dealers

Recommended Uses

  • Multi-family Construction
    • Apartments
    • Hotels
  • Condominiums
  • Residential and Single Family
  • Commercial Office Space
  • Renovation of old wood frame or concrete structures


80lb bags
3000lb Supersacks