UNDERLAYMENT SOUND RATINGS
UNDERSTANDING ACOUSTICS

IIC
Measures a floor/ceiling assembly’s resistance to transmission of structure-borne or impact noise such as footfall, or a chair dragging on the floor.
STC
Rates a partition’s or material’s ability to block airborne sound such as a television or people having a conversation.
ΔIIC
The acoustic performance gain between a bare concrete subfloor assembly and a full flooring assembly with underlayment.
UNDERSTANDING ACOUSTICS

IIC
Measures a floor/ceiling assembly’s resistance to transmission of structure-borne or impact noise such as footfall, or a chair dragging on the floor.
STC
Rates a partition’s or material’s ability to block airborne sound such as a television or people having a conversation.
ΔIIC
The acoustic performance gain between a bare concrete subfloor assembly and a full flooring assembly with underlayment.
WHY USE A FLOORING UNDERLAYMENT?

Compression Characteristics
help protect tongue and grooves

Adds R-Value
The capacity of a material to resist heat transfer

Improves Acoustic Performance
Through the floor impact noise (IIC)
Through the floor airborne noise (STC)
Performance gain using underlayment (ΔIIC)

Helps control MVTR
The passage of water vapor through a substance

Settle Floor Imperfections
Helps eliminate minor subfloor imperfections
it's what's underneath that counts®

FloorMuffler is now recognized as a MasterSpec product by The American Institute of Architects. Click here for more details.