You have heard of thinking outside the box. Try inside the box. Forget
the bedroom side. Can you go inside your mechanical room and insulate
from there? Could you add a layer of fiberglass insulation and top it
off with a sheet of drywall, sealed on all sides to prevent air gaps?
With only 4 feet of wall to work with, it would not cost much to try
this if you have room to work with in the mechanical room. Two things
he you do not want to create a fire hazard, so you cover the
fiberglass with the drywall. Sound travels through air gaps, so don't
leave any. If it inside the mechanical room, does it have to be a thing
of beauty? Think duct tape. And it would be easily removed if you wanted
to take it out later.

Others may differ, but there have been many problems reported from
putting foam insulation inside a wall, so think twice before you punch a
hole and insert a spray can of insulation. If nothing else, read the
warnings on the foam before you buy any. When you do, you will probably
put it back on the shelf.

Stoney


Harry Muscle wrote:

We just moved our master bedroom into the room right beside the mechanical
room. Unfortunately, this means that our bedroom is now a little louder
then the previous room. Is there something that I can do to the wall to
sound proof it? The wall that is shared between our room and the mechanical
room is only about 4 feet long. Is it possible to maybe fill the gaps in
between the studs with something. I would need a solution that wouldn't
require more than a few large holes in order to install it. I'm not in a
position to completely tear up the wall and redrywall everything.

Thank you for any help,
Harry

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