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Treadstone® M3 Sound Attenuating Mat

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Treadstone™ M3 Sound Attenuating Mat is a three dimensional mesh of Polypropylene Synthetic Monofilaments, UV stabilized, tangled and welded where they cross laminate to the Polypropylene Barrier Fabric. With its “cuspated” geometry, Treadstone™ M3 delivers the highest level of sound control between floor levels, with long term performance due to its excellent mechanical compression resistance.

Treadstone™ M3 is loose-laid over the substrate and then covered with a uniform thickness of an approved Treadstone™ Underlayment Product. Mechanical Fastening is not required, providing a system profile thickness as thin as 1 7/8” (47.6 mm).

  • In conjunction with 1.5” of Treadstone™ Underlayment, the installed system can reduce impact noise (IIC) up to 16 dB in wood framed and 20 dB in concrete assemblies. Refer to Treadstone™ Acoustical Design Guide for acoustical test performance, or contact Formulated Materials for specific test data.
  • Polypropylene barrier fabric
  • Low profile; .3/8” or 8.5mm
  • Excellent noise control performance with a spectrum of floor covering options.
  • Flexible and resilient, while maintaining excellent compression resistance.
  • Because this system is embedded, noise problems are reduced, even when floor coverings are changed or replaced. • UL listed in over 110 designs, for specific design or data contact us at

Treadstone™ M3 Sound Attenuating Mat in conjunction with an approved Treadstone™ Underlayment, is recommended and approved in;

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

 Raw Material   Polypropylene   

 Weight EN1849-1 g/m2 95 oz/yd2 2.80±5%

 ThicknessEN 1849-1 mm 0.3 in 0.01±15%

 Width  m1.5 in 59.06 ±2%

 Tensile Strength (mean) EN 12311-1 N 115   ±15%

 Elongation at break(mean) EN 12311-13 % 65-63   

Water penetration resistanceEN ISO 1928 Watertight   

Elongation at break(mean)EN 13859-1 W1   


 Raw Material  Polypropylene

 Weight g/m2 550 oz/yd2 16.22 ±10%


 Compression and Deflection  Compression res.  Residual Thickness 

  (kPa) (psf) time (mm)(in)

  2 41.8 0 9.50 0.37

  5 104.4 0 9.000.34

  5  104.4 1 week 8.950.33

  5  104.4 1 month8.800.33

  5  104.4 3 months 8.750.32

WeightEN 965g/m2645oz/yd219.02±10%

ThicknessEN964-1mm 9.5in0.37±10%

 Adhesive tape for overlapping   butylic adhesive

 Width with flap  m 1.5 in 59.06 ±3%

 Length  m 35 ft 114.83 ±3%

 Roll area  m2 52.5 ft2 565 

 Roll diameter cm 56 in 22.05 ±5%

 Roll weight  kg 33.8625 lbs 41.44 

 Rolls per pallet  number 4 number 6 


Clean, remove all foreign matter from surface. Surface must be dry.


Treadstone™ M3 Sound Attenuating Mat is to be installed by a licensed Treadstone™ Dealer. The building must be closed in with a minimum of 50 degrees F, maintained for a period of 5-7 days during and after the installation of Treadstone™ M3 and Treadstone™ Underlayment. M3 is loose laid on the subfloor with seams tightly joined and fastened by peeling plastic film from butyl strip of overlap flap, and pressing firmly to the adjoining M3. The perimeter of rooms, adjoining walls, all fixed objects, and mechanical penetrations must be isolated with Treadstone™ Perimeter Isolation Strip.


Store in dry conditions.

  • Treadstone™ M3 is only one component of the floor ceiling assembly and overall noise reduction strategy. While using Treadstone™ M2 will improve the overall acoustics performance of the assembly, the exact amount or minimum performance cannot be guaranteed. Formulated Materials recommends contacting an acoustical consultant for recommendations regarding the acoustical performance of any and all projects.
  • To minimize risk of damage to the Treadstone™ Underlayment, installation of M3 and underlayment is recommended after drywall. For installation prior to drywall, contact Formulated Materials for recommendations.
  • Treadstone™ Underlayment thickness/compressive strength recommendations
    • Residential/Multifamily Construction: 1” (25.4mm) at 2,000 psi minimum
    • Light Commercial: 1” (25.4mm) at 3,000psi minimum

G230  G516  G524  G561  G577  G578  G579  G580  G581  G582  G587  G592


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