Acoustics First Corporation. Materials to Control Sound and Eliminate Noise. TM
Products » Barriers & Vibration Control » Vibration Control » Floor Underlayment

Floor Underlayment

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Underlayment provides floor isolation to prevent sound transmission, structural noise transmission and impact noise.Floor underlayment is constructed of a flexible non-lead loaded solid mass barrier fusion-bonded to a ¼" 8-10 lbs. density closed-celled PVC foam decoupler.
STC: 27 Roll Size: 54" (w) x 25'

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The foam layer of this carpet underlayment decouples the layers of floor materials to prevent floor vibrations from transmitting structural or airborne sounds from noise sources.


  1.25 lb. / sq. ft.

Temperature range:

  -40 to 255 deg. F
The Barrier and The Bell - Increasing STC by combining differnt materialsClick here for a video on how combining different materials create better sound isolation.
Floor Underlayment
Sound Transmission Loss (dB) Per Octave Band (Hz)
  125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz STC
3/8" 17 19 23 28 31 38 27
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