Serenity 12mm Acoustic Underlayment Roll
The Serenity 12mm Underlay Roll is the thickest sheet in the Serenity underlayment line — engineered for projects that want the highest impact isolation a single underlayment layer can deliver. Each 4' × 20' roll covers 80 sq ft with a 12 mm profile, ideal for high-end residential floors above living space.
- 80 sq ft per roll: 4 ft × 20 ft — the thickest Serenity underlay ships in a denser roll sized for room-scale floor projects.
- 12 mm build-up: The most cushion in the Serenity line — meaningful impact IIC gains for footfall and dropped-object noise.
- 1.1 lb / sq ft mass: Loaded mass matches the 9 mm sheet — the extra 3 mm of thickness is what buys the additional impact isolation.
- R-0.35 thermal: Best thermal benefit of the line — helpful in high-end residential where floor comfort matters as much as acoustics.
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.
12mm Roll Specifications
- Application
- Floating & glued-down finished floor decoupling
- Roll size
- 4 ft × 20 ft (80 sq ft)
- Thickness
- 12 mm
- Mass
- 1.1 lb / sq ft
- Thermal resistance
- R-0.35
- Composition
- Recycled rubber composite
- Compatible finishes
- LVT, engineered wood, laminate, floating floor
12mm Roll Project Calculator
Enter your floor square footage — we'll estimate the number of 12mm Roll rolls needed (each roll covers 80 sq ft).
Coverage is 80 sq ft per roll. Add a 10% buffer for seams, cuts, and re-work.
IIC Gauge
Compare how the 12mm Roll performs across assembly tiers. Select an assembly below to see the resulting IIC score.
Serenity 12mm + 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 12mm Roll fits — from budget baseline to studio-grade isolation.
Best — Serenity 12mm + Double Subfloor + Green Glue
Structural subfloor · Serenity 12mm underlay · plywood layer with Green Glue between layers · finished floor · perimeter acoustic sealant.
Better — Serenity 12mm + Finished Floor
Structural subfloor · Serenity 12mm underlay · finished floor · perimeter acoustic sealant.
