Which floor system achieves the highest IIC rating?
The floor system at Intertek that achieves the highest IIC rating is the 6″ concrete with a ceiling plenum. Every floor and underlayment combination will achieve different results. It is very difficult to predict what results a particular floor will get. Typical results for the system range from the mid 50s to the low 60s in IIC rating. Typically carpets will get much higher ratings.
