I'm refurbishing our bathroom. I had to tear out the old
plaster/drywall because of the mastic left when I removed the old
ceramic tiles on the wall. I'm ready to install drywall and plan
to install the moisture-resistant kind.
Should I install some sort of vapor barrier, like poly sheet or
whatever, before I put the drywall up? There was nothing like
that there originally. Or is this only for outside walls?
Is there any sort of insulation--foam sheets or whatever--I can
put in the wall that will help reduce sound? Would I want to put
regular thermal insulation in there for this purpose, or would I
need to get special sound insulation for this (none of the
bathroom walls are outside walls, so there's no need to do this
for thermal insulation). Should I even worry about sound
dampening--the drywall seems rather thick?
Also, I'm a bit confused as to how to cut out portions of the
drywall for plumbing etc. Do I want to try to cut all the
necessary openings in the drywall before I nail it up or do you
typically make the holes for the plumbing, electrical outlets,
etc. after it's been attached to the wall? I can see advantages
and disadvantages either way. Or some combination of both?