Fire Protection


The Acoustic Sleeper is an integral part of UL Design L563, providing fire-resistant floor/ceiling construction currently offering a 30-minute rating. This is ideal for wood truss floor construction in 5-story Type III-B or 3-story Type V-B construction. The pads and plywood substitute for acoustic mats and gypsum cement underlayment, at about half the cost.

A 30-minute separation is all that is needed in these buildings per the International Building Code (IBC 711.2.4.3). Local codes may vary.


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.

ul_small 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.