Fire Protection


The Acoustic Sleeper is an integral part of UL Designs for 1-hour and 2-hour fire-resistant floor/ceiling construction:

  • Wood Truss 1-hour: L528, L563, L574
  • Wood Truss 2-hour: L577
  • Wood Joists 1-hour: L502, L506, L514
  • Wood Joists 2-hour: L505
  • I-Joists: L589
  • Metal Joists: L524
  • Light Gauge Metal Truss: L560, L565

The pads and wood panel subfloor install over the floor sheathing and substitute for acoustic mats and gypsum cement underlayment, at much less cost, higher performance, and better comfort underfoot.


Partitions are used not only to isolate rooms from noise but also to protect rooms from the spread of fire. The International Building Code (IBC), the most common model for state and local codes, refers to these as fire partitions.

When electrical outlets are recessed into these partitions and outlets on opposite sides of the wall are within 24-inches horizontally from each other, they are required to have special wall opening protective measures to prevent fire spreading – referred to as the 24-inch Rule by electricians (IBC 714.3.2). Underwriters’ Laboratories (UL) provides a test to make certain these wall opening protective materials will protect rooms from the spread of fire under the conditions in which they are used.

Fire partitions are rated for 1-hour, and are required as separations for dwelling units in apartments, condominiums and assisted living facilities. They are also required to separate sleeping rooms in hotels and dormitories. These are the same partitions where sound control is desired, and in some cases required by the Code.

The 1-gang Duplex Box Seal is UL-listed as a wall opening protective material for one-hour fire partitions, even back-to-back, when used with a metal wall plate.