Acoustic Floor Underlayment

Acoustic Floor Underlayment

Acoustic Floor UnderlaymentAcoustic Floor Underlayments are used to control foot fallnoise between floor and ceiling assemblies. Two types of noise can be transmitted through these assemblies: airborne noise and structure borne noise. Airborne noise such as loud speech, television, or music, is controlled or blocked by heavy weighted material – the heavier the material the better the performance at blocking airborne noise. These materials are rated in STC, or Sound Transmission Class. Structure Borne Noise is commonly referred to as impact noise, such as footfall, dragging furniture, dog walking, etc. Structure borne noise is controlled by absorbing the vibration under foot. A common absorbing product is carpet, it cushions where you walk thereby reducing impact noise into the unit below. Acoustic underlayments are used specially to cushion vibration energy and are associated with Impact Isolation Class (IIC).  The higher the IIC number is the better impact isolation reduction from impact noise will be. IIC testing is only for floor/ceiling assemblies.

Oelex SoftStep Acoustic Floor Underlayment DetailOELEX SoftStep is a 1 or 2 PSF acoustic floor underlayment made from recycled rubber tires and can be installed under floated or double glued engineered hardwood and laminate flooring. SoftStep is excellent for noise control and is the perfect product for use in lightweight wood frame construction due to its weight & mass, controlling both airborne and structure borne noise.

    • Available in 4’ x 25’ rolls with stocked thickness of 6mm, & 12mm.
    • Can be installed as a free-floating or glue down system.
    • Offers excellent noise control for both airborne noise reduction & impact isolation.
    • Easy and fast installation reducing installation time.
    • Environmentally friendly, made from recycled tires using 92% post recycled content.
Thickness Roll Size/ Weight Acoustic IIC Test
2″ x 10″ Wood Frame
Construction w/Topping
1/4″ (6mm) 4′ x 25′ / 100 lbs. 57 26
1/2″ (12mm) 4′ x 25′ / 200 lbs. 57 30

Recycled Content:
OELEX SoftStep products are comprised of shredded and cleaned SBR tire rubber.

Post Consumer Content: 88%

Applicable Credits:
LEED-NC MR 4.1 and MR 4.2
LEED-EB MR 2.1 – MR 2.5

Fabrication Location:
Lebanon, PA 17042
LEED-NC MR 5.1 and MR 5.2


For more information email or call us at 1-877-406-6473.