Acoustic Sleeper Strip (44″)

Acoustic Sleeper Strip (44″)

$230.00 10 @ 44" Strips

SKU: STCWF040743-T8 Category:

993 in stock

Acoustic Sleeper Strips are 1/4-inch thick neoprene, 1-1/2-inch wide and 44 inches long. They are stapled to the underside of span-rated plywood. The Acoustic Sleeper has been granted US Patent No. 10,041,245.

Strips are recommended at terminal edges and butt-edges of panels where floor finishes are brittle or stiff, such as tile or concrete. Strips can also be used anywhere pads are normally used.

Acoustic Sleeper Strips are always stocked. Minimum order is a box of 10 strips, 44 inches long.

*Please allow 2 weeks to fill and ship your order. There is no cost for shipping the Acoustic Sleeper Strips within US-48.

The Acoustic Sleeper system has a ΔIIC-23, a higher impact insulation classification than acoustical mats and gypsum cement, rubber mats, cellulose panels, and cork. The Acoustic Sleeper pads or strips are paired with a construction panel that has a structural span rating and forms the subfloor such as oriented-strand board (OSB), plywood, cement-bonded particle board, structural cement or magnesia board.

The Acoustic Sleeper allows installation of any type of finish flooring, including hardwood strips, engineered wood, tile (stone, porcelain, ceramic, glass), LVT, vinyl sheet, vinyl plank, vinyl tile, rubber flooring, carpet tile, broadloom carpet or even thin lightweight concrete.

Wood frame construction typically has a single subfloor/sheathing panel. The Acoustic Sleeper system separates the functions with two panels. The sheathing panel is fastened to the structural members to provide diaphragmatic shear resistance. The subfloor panel is supported on top of the sheathing by the Acoustic Sleeper pads or strips, and in line with the structural members. This isolates the transmission of impact vibration while transferring the live loads to the structure. In event of fire, the lower sheathing layer chars and protects the upper subfloor layer so it can continue to carry the structural loads for the required fire resistance. Current UL Designs include:

  • Wood Joists: L502, L506, L514
  • I-Joists: L589
  • Wood Truss: L528, L563, L574
  • Metal Joists: L524
  • Light Gauge Metal Truss: L560, L565


Non-combustible construction also has a subfloor panel supported on top of the deck by the Acoustic Sleeper pads or strips. It not only provides an exceptional Impact Insulation Classification for footfalls; it also provides isolation from other structure-borne sounds between floors.

Building codes require that fire partitions extend from the top of a fire-rated floor/ceiling assembly (IBC 708.4). The Acoustic Sleeper system is an integral part of 2-hour fire-rated UL Design D902, so instead of extending from the concrete deck, partitions can by placed on top of the panels – they are part of the assembly. This provides a break in the sound flanking path that normally sends noise from televisions or speakers mounted on the partition or floor through the studs and concrete to apartments above and below.

The Acoustic Sleeper can be used in a variety of environments where floor noise is a concern and impact insulation the goal

The Acoustic Sleeper has a number of benefits over competitive products

  • Easy use with any type of flooring that uses panels to form the subfloor.
  • Structural discontinuity for maximum impact noise isolation with only 0.3% of floor area in contact with the structure.
  • Structure-borne noise isolation where partitions are installed on top of the panels.
  • High IIC ratings at lower cost.


The Acoustic Sleeper is ultimately effective because it creates structural discontinuity. The goal of noise isolation is to keep the material that receives the impact from contacting the actual building structure.

The profile (patent pending) and spacing of the sleepers creates a huge difference between the amount of finish floor area and the amount actually in contact with the structure. For sleeper pads spaced at 24 inches, this means 99.7% of the finish floor area actually floats above the structure, making them superior to options like mats that make continuous contact with the structure.

In the AIA Product MasterSpec

Section 061600 “Sheathing” as an Acoustical Accessory for Underlayment Systems, under Miscellaneous Materials.

Product Description

Noise from floors above can travel through the floor structure and radiate into the space below. This is known as impact noise or footfalls, which is measured by a standard called the Impact Insulation Classification (IIC). Different elements of the floor and ceiling construction contribute to isolating this noise in various amounts, and are called the ΔIIC, or Delta IIC (for difference). All dwelling units and sleeping rooms in apartments, condominiums, hotels, and other multiple-unit housing are required by the International Building Code to maintain a IIC-50 (IBC 1207.3).

The STC Acoustic Sleeper helps to prevent impact noise from reaching floors below, and also isolates structure-borne sound as with partitions that extend upward to the structural deck. With identical floor plan layouts there is a very effective sound flanking path into the partition directly above. The Acoustic Sleeper system disconnects this sound path since partitions are fastened to the underlayment panel, not the structural deck.

Acoustic Sleeper pads and strips are 1/8-inch thick neoprene, 1-1/2-inch wide, and are easily and quickly stapled to the underside of span-rated plywood. Patents are pending.

The Acoustic Sleeper is an integral part of fire-resistance rated floor/ceiling assembly UL Design L563, System 1. It is currently rated for 30 minutes, ideal for 5-story Type III-B construction and Type V-B of 3 stories. The 30-minute rating is all that is needed to protect dwelling units and sleeping rooms per IBC 711.2.4.3. The system provides considerable cost savings over acoustical mats and gypsum cement and has a higher ΔIIC-18.

In addition to providing impact isolation, the Acoustic Sleeper system isolates structure-borne sound that enters a partition in a lower space from flanking into the space above. Typical fire-rated partitions extend to the structural deck; identical floor plan layouts place another partition directly above, also firmly attached to the deck, completing a very effective sound flanking path. With the Acoustic Sleeper system, partitions are fastened to the underlayment panel, not the structural deck, effectively disconnecting this sound path.


Frequently Asked Questions

What is the Acoustic Sleeper made of?

Neoprene, a dense and resilient rubber selected for its ability to isolate vibrations.

Why does the Acoustic Sleeper have that particular profile (patent pending)?

A critical goal of isolating impact noise is to minimize contact between the finish floor surface and the supporting structure. More than 99.2% of the floor area actually floats on air with Acoustic Sleeper installations; continuous mat systems don’t do that.

Does the Acoustic Sleeper meet the International Building Code (2015)?

Yes. The Acoustic Sleeper is made of solid neoprene rubber, not wood, and IBC Section 718.2.7 does not apply. Independent tests per ASTM E2179 of sleeper pads at 24-inches under plywood performed at ΔIIC-18 and is a major component of the Impact Insulation Classification of floor systems to comply with IBC Section 1207.3. When used over a concrete deck it achieves IIC-46 even before a finish floor or ceiling is added to the underlayment system.

What configurations are available?

Acoustic Sleepers are 1-1/2″ wide, 1/4″ high, and are available as pads (1-1/2″ square) and strips (8′ long). They can be easily cut with a knife to any length.

What color is the Acoustic Sleeper?

The standard color is black.

How Does ΔIIC work to determine total system IIC values?

Conceptually, the ΔIIC values for the components of the floor/ceiling system should add together to provide the IIC for the system. However, the actual sound transmission values at different frequencies will affect the results. Better estimates can be analyzed if tests from all components are available.

Leave a Reply