Serenity 6mm Acoustic Underlayment Roll
The Serenity 6mm Underlay Roll lays a continuous decoupling layer between the finished floor and the subfloor, breaking the direct vibration path that carries footfall and mid-frequency impact between floors. Each 4' × 30' roll covers 120 sq ft with a low-profile 6 mm build-up — the go-to specification for wood-framed multi-family upgrades that don't need the extra mass of the 9 mm or 12 mm sheets.
- 120 sq ft per roll: 4 ft × 30 ft continuous roll — one roll covers a typical bedroom or home-office floor with minimal seams.
- Low 6 mm profile: Adds acoustic decoupling without the buildup of thicker isolation mats — safe under LVT, engineered wood, and floating floors.
- 0.9 lb / sq ft mass: Enough loaded mass to disrupt airborne transmission through the underlayment layer while staying light enough for retrofit installs.
- R-0.25 thermal: Small thermal-resistance boost as a side benefit — helpful for slab-on-grade rooms and cold subfloors.
Online orders up to 500 rolls. For anything larger, call (415) 864-4440 and we'll price the project with you.
Freight shipments include a $100 freight-and-handling charge.
6mm Roll Specifications
- Application
- Floating & glued-down finished floor decoupling
- Roll size
- 4 ft × 30 ft (120 sq ft)
- Thickness
- 6 mm
- Mass
- 0.9 lb / sq ft
- Thermal resistance
- R-0.25
- Composition
- Recycled rubber composite
- Compatible finishes
- LVT, engineered wood, laminate, floating floor
6mm Roll Project Calculator
Enter your floor square footage — we'll estimate the number of 6mm Roll rolls needed (each roll covers 120 sq ft).
Coverage is 120 sq ft per roll. Add a 10% buffer for seams, cuts, and re-work.
IIC Gauge
Compare how the 6mm Roll performs across assembly tiers. Select an assembly below to see the resulting IIC score.
Serenity 6mm + double subfloor with Green Glue between layers.
- STC 30-39: Loud speech clearly audible next room.
- STC 40-49: Loud speech muffled — normal residential wall.
- STC 50-59: Loud speech barely audible; suitable for offices & multi-family.
- STC 60+: Approaches studio-grade isolation.
Applicable Assemblies
See where the 6mm Roll fits — from budget baseline to studio-grade isolation.
Better — Serenity 6mm + Double Subfloor + Green Glue
Structural subfloor · Serenity 6mm underlay · plywood layer with Green Glue between layers · finished floor · perimeter acoustic sealant.
Good — Serenity 6mm + Finished Floor
Structural subfloor · Serenity 6mm underlay · finished floor · perimeter acoustic sealant.
