Acoustic Sleeper

Grouped product items
Product Name Qty
Acoustic Sleeper Pad per pad
  • Low profile solution for decoupling floors, stages, and risers.
  • STC, IIC, UL, and structural tests to prove efficacy. Better performance and proven performance, unlike joist isolators or similar solutions.
  • Low Shore A durometer is soft enough to allow performance in both concrete and wood structures.
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The Acoustic Sleeper is a high performance solution for decoupling floors, stages, risers, and other similar assemblies over wood or concrete structures. Each Acoustic Sleeper is only 1/4" thick, resulting in an addition of just 1-1/8" overall to the assembly thickness when combined with the required double layer 7/16" OSB/plywood.


Other competing solutions like u-channel joist isolators and waffle pads require a high durometer for manufacturing purposes. Products with a high durometer require more pressure to deflect (compress), or in other words, require more pressure to actually work. If installed correctly, this makes for a very thick floor at a high cost per square foot. If installed incorrectly (most common result), this makes for a floor with not much value in terms of soundproofing. A concrete substrate is required to provide mass and rigidity for other solutions to isolate any sound, and even then the performance would be limited because of the stiffness of the rubber. If you are attempting to isolate the floor of a wood structure, then significant mass would need to be added above or below the system. So much mass that the structure likely would not be able to support it or so much mass and thickness that most customers would not be willing to make the appropriate accommodations because of cost and the height required. A proper installation of u-channel joist isolator systems require a buildup of at least 6", making for an unusually thick floor with, at best, minimal performance gains.

The typical end result for other competing solutions is a decoupled floor for the sake of claiming a decoupled floor. The real world gains expected are not ultimately achieved. There are not STC, IIC, UL, or structural tests for these solutions. They are generally solutions promoted by companies online or in online forums as a 'better than nothing' approach with a huge question mark on what they are really accomplishing.


  • The Acoustic Sleeper is manufactured with a low Shore A durometer of 40, putting it in line with resilient clips with the softest rubber base. This allows for full deflection with minimal added mass and is an ideal softness for low frequency attenuation.
  • The design of the Acoustic Sleeper is such that only the two outside edges make contact with the floor. As opposed to other solutions, like u-channel joist isolators, that make full contact with the floor, or waffle pads, that make nearly full contact with the floor. With the Acoustic Sleeper, 99.8% of the calculated floor area is isolated from the structure.
  • Low profile 1/4" Acoustic Sleeper plus double layer 7/16" OSB stackup fits with most assemblies without a significant step-up to the newly decoupled floor. Meaning this solution generally works on all floors, even in retrofit applications.

Whether the structure is concrete or wood, simply attach the Acoustic Sleepers to the back of a 7/16" OSB panel per the installation instructions, flip it over, fasten another 7/16" layer on top, and you're installed.

This simple assembly is independently tested in both concrete and wood structures to show significant gains in isolation. An improvement of 24 IIC points in a basic 6" concrete structure and gains of 5 STC and 5 IIC points in wood structures. These tests are in simple assemblies comparing a base assembly to an assembly that has only the Acoustic Sleeper and T&G OSB added on top.

Based on our experience and results from customers, a safe estimate is square footage divided by 2 to find the number of Acoustic Sleeper pads needed for your project.


Using pads only, a 1,000 square foot floor would require 500 pads (1,000 / 2 = 500).

Download The Manufacturer's Installation Guide 772 Kb

The Acoustic Sleeper is fastened to the bottom side of a sheet of 7/16" OSB/plywood following a basic spacing pattern as shown below. The pads are spaced in rows 24" on center with rows also spaced 24" apart. The panel edge on each short trailing side should have pads spaced 8" on center to eliminate possible differential deflection at the seam. The Acoustic Sleeper is 1/4" thick and can be fastened using standard 3/4" screws or nails, as well as wide crown staples, or even urethane adhesive. Once the first layer is completed, fasten a second layer of 7/16" cross plied to the first layer.

NOTE: For additional support along the perimeter of each wall, use a 1/4" thick plywood cut in 4" strips in place of the perimeter Acoustic Sleepers.

Acoustic Sleeper Soundproof Floor Installation Layout

Acoustic Sleeper Specs
Coverage Estimated 1 pad for every .5 square feet (~14 per 4' x 8' sheet)
Dimensions 1-1/2" square x 1/4" thick for the pad.
Material Rubber with Shore A durometer of 40
UL Ratings
Wood joists: 1 hour, L502, L506, L514. 2 hour L505. I-Joists: 1 hour, L589. Wood Truss: 1 hour, L528, L563, L574. 2 hour L577. Metal Joists: 1 hour, L524. Light Gauge Metal Truss: 1 hour, L560, L565.
Spacing Follow standard 24" on center spacing for most areas. 8" on center spacing on the short edge of each panel where two panels come together.
Fasteners Use 1/2" nails, screws, or wide crown staples, or general urethane adhesive.
Acoustic Sleeper Downloads
Acoustic Sleeper Product Data and Submittal Sheet DownloadPDF 902 KB
Installation Guide in English DownloadPDF 772 KB
Acoustic Sleeper FAQ's DownloadPDF 601 KB
Acoustic Sleeper Application Drawings DownloadPDF 757 KB

The performance of Acoustic Sleeper can help the most basic of assemblies achieve 50 STC and 50 IIC requirements. Acoustic Sleepers have been been tested for STC, IIC, and is UL fire rated in multiple assemblies.

*All test results shown in this table were achieved through third party testing from accredited laboratories. The full test is available upon request.

Independent Sound Test Results
Type Assembly STC IIC ΔIIC
Concrete Structure Bare 6" concrete slab, no ceiling or floor - 27 -
Concrete Structure Bare 6" concerete slab, no ceiling, Acoustic Sleeper attached to 3/4" OSB - 51 23
Concrete Structure Bare 6" concerete slab, no ceiling, Acoustic Sleeper attached to 3/4" OSB, 2mm Luxury Vinyl Tile glued directly 52 51 23
Wood Structure Open web trusses, resilient channel and 5/8" drywall on ceiling, insulation between joists, 1/2" OSB sub-floor 54 47 -
Wood Structure Open web trusses, resilient channel and 5/8" drywall on ceiling, insulation between joists, 1/2" OSB sub-floor with Acoustic Sleeper attached to 3/4" OSB 59 52 -
Wood Structure Open web trusses, resilient channel and 5/8" drywall on ceiling, insulation between joists, 1/2" OSB sub-floor with Acoustic Sleeper attached to 3/4" OSB, 2mm Luxury Vinyl Tile glued directly on top 59 52 -

Additional test results are available in this chart made by the manufacturer. All tests listed are based on IIC tests for simple ceiling assemblies with or without the sleeper system. The performance gains by incorporating the Acoustic Sleeper are significant in both wood and concrete structures with all types of finish floors.