Whisper Step®

Whisper Step® luxury vinyl underlayment features unmatched, high-density support under luxury vinyl flooring. Whisper Step® provides a significant reduction in impact noise and can be used over most substrates.


  • Luxury vinyl tile/plank
  • Rigid composite

Also for use under

  • Laminate
  • Engineered wood
  • Solid hardwood


  • Provides significant reduction to impact noise in the room and floor below
  • Retains acoustic properties over time
  • Guaranteed not to break down or bottom out for the life of the floor
  • For use over in-floor heating and is recommended by the Radiant Professionals Alliance as an excellent choice
  • Can be used over most substrates – on, above, or below grade
  • Fresh Dimension® antimicrobial inhibits the growth of mold, mildew, and odor-causing bacteria


Composition: Made of High-Density Synthetic Rubber
Density: 62 lbs/ft³ (42 oz/yd²)
Thickness: 0.056" (1.42 mm)
R-value: 0.02
Moisture Barrier: N/A*
Color: Green
Castor Durability Test: Passes 25,000 Cycles**
Product Codes:
36" x 33.33'54" x 44.44'
Roll Weight:
29 lbs58 lbs
Impact Insulation Class (IIC): 66***
ΔIIC: 22
Sound Transmission Class (STC): 63***
Indoor Air Quality: CRI Green Label Plus-certified
Antimicrobial: Fresh Dimension®
Warranty: Life-of-the-Floor
  • *Separate moisture barrier should be used on slab foundation and below-grade installation
  • **Passes Castor Durability Test for 25,000 cycles when tested under minimum of 3 mm double-glued luxury vinyl plank and minimum 3.2 mm floating-click
  • ***When tested with floor-ceiling assembly
  • IIC: ASTM E492-09/ASTM E989-06
  • ΔIIC: ASTM E2179-03
  • STC: ASTM E90/ASTM E413-10