About this carpet pad
Leggett & Platt Whisper Step Acoustical Underlayment delivers superior sound reduction, moisture protection, and high-density support for hard-surface flooring. Designed for luxury vinyl, rigid core, laminate, and hardwood flooring, Whisper Step reduces impact and airborne noise while providing added comfort underfoot. Its durable synthetic rubber construction resists compression, while Block-Out® Moisture Guard and Fresh Dimension® antimicrobial protection help maintain a cleaner, drier subfloor. Easy to install above or below grade, Whisper Step is an ideal solution for residential and commercial flooring applications.
Technical Details
Brand: Leggett & Platt
Product: Whisper Step
Product Type: Acoustical Underlayment
Composition: High-Density Synthetic Rubber
Thickness: 0.056" (1.42mm)
Density: 62 lbs/ft³ (42 oz/yd²)
Color: Green
Available Roll Sizes: 36" x 33.33'
Roll Weight: 29 lbs
Compatible Flooring: LVT, Rigid Core, WPC, Laminate, Sheet Vinyl, Engineered Hardwood, Solid Hardwood
Installation: Floating or Glue Down; Above or Below Grade
Moisture Barrier: Block-Out® Moisture Guard
Antimicrobial Protection: Fresh Dimension®
Impact Insulation Class (IIC): 73
High-Frequency Impact Insulation Class (HIIC): 88
Delta IIC: 22
Sound Transmission Class (STC): 64
Shore A Hardness: 70 (ASTM D2240)
R-Value: 0.02
Permeance: 1.151 (ASTM E96)
Water Vapor Emission: 0.252 lbs/1000 ft²/24 hrs
Indoor Air Quality: California Section 01350 Compliant
