Acousti-blok makes a dense vinyl barrier, which
is much more effective in sound elimination
than lighter materials such as foam or cork or
than lighter materials such as foam or cork or
fiberglass or wood because it BLOCKS acoustic
energy rather than absorbing it, which is what
the various lighter products do.  More
specifically, in a concert hall, or a large room or
a recording studio, where you want to reduce /
control echoes and eliminate the *tinni-ness*,
you put foam.  Au contraire, where you want to
prevent transmission of sound from one space
to another (as in the case of HVAC equipment or
drums, etc), then blocking the sound is more

t is installed on the side of the room from which
the noise is emanating and is attached
(somewhat loosely) directly to the studs and
ceiling joists.  The strategy is to prevent the
sound energy from entering the structure.  As
water flushing through pipes can create a noise
problem, a recommended application is to first
wrap pipes with batting and then wrap the
insulated pipes with acouti-blok.
It comes in two thicknesses
  • 1 lb / square foot -         about 1/8* thick        sufficient for general sound blocking
  • 2 lbs / square foot          about 1/4" thick       recommended for particular problematic noise generators

Drums are a particularly difficult application because they have most of their sound pressure in the low
frequency range.  Having said that, foam doesn*t even come close to performing the way that the vinyl
does.  Normally, one would not sound proof a slab.  In the case of the drums, the recommendation would be
to put a *pad* of the vinyl on the floor, directly under where the drums will be.   Again, the strategy is to
prevent the low frequency vibrations from entering the structure as much as possible.

The vinyl barrier ships with special caulking (Acousti-caulk) and tape (Acousti-tape) to address corners and
seems and light switches and electrical outlets, etc.

Doors and Windows are particularly problematic when it comes to sound-proofing.  Most sound studios
have no windows and the doors are "double" doors with a small antechamber between.   If the aesthetics of
this for residential is a non-starter, Acousti-blok CAN be incorporated into custom doors, although they
become very heavy and very expensive.

For more information see