NAC Products’ Super SAM 125 Sound Control Membrane has achieved an IIC rating of 51, a Delta IIC rating of 22 and an STC rating of 54 on a bare, 6" concrete slab.

Architectural Testing was contracted by NAC to conduct impact sound transmission, delta impact sound transmission and airborne sound transmission loss tests. The tests were conducted in accordance with standards ASTM E 492, ASTM E 2179 and ASTM E 90.

“We are very excited to have Super SAM earn these ratings,” said Vice President of Operations Brian Petit. “An IIC rating of 51 on a bare, 6” concrete slab is something very few products in our industry have the distinction of achieving.”

The IIC (Impact Insulation Class) is a rating used to evaluate the performance of the floor/ceiling assembly from impact sounds that affect the floor below. Delta IIC is determined by taking the measurement of the floor assembly prior to installation of the acoustical membrane, recording that IIC rating, conducting the test with the membrane system in place and recording that rating. The difference between these two measurements is the Delta IIC rating.

The STC (Sound Transmission Class) is a rating used to evaluate the performance of the floor/ceiling assembly from airborne sounds. Most building codes call for minimum IIC and STC ratings between 45 and 50.

Petit noted, “Super SAM is designed for setting tile, stone and other hard surface flooring while also providing up to 3/8" of crack isolation protection.”

For more information, call 800-633-4622 or visit www.NACproducts.com.