Note: The Δ IIC is a new
ASTM test that measures the improvement in
decibels. Example a Δ IIC 25 would mean a 25
point improvement . The Δ IIC tests is only
tested on a 6" concrete slab with no ceiling
below.
Note: The
FIIC is a IIC
test is
performed in the
field and is
shown as a FIIC
rating, it is
the same tested
and tested in
the same manner
except it is
performed in the
field.