I am going to start re-doing a bathroom shortly and my wife wanted to
keep our old cast-iron tub, remove the wall tiles, and install a tub
surround. We went to home depot and I felt some of them and chose one
that seemed the most sturdy. It was about $300.00 and screws directly
to studs. Since it screws into studs, I am not going to install any
green board ( the dimensions would be tight if I did), but will this
result in a loud shower to the neighboring room? Should I install
some type of foam as an insulator? Should I put the greenboard up
In my opinion, shower noise isn't a big deal. What you really don't
want is to sit on the toilet and be able to hear a conversation in the
next room. Talk about lack of privacy ...
If the surround is rated for use without any backing, then skip the
drywall. Simple R13 Fiberglass insulation makes a nice soundproofing
barrier. The properties that make it a good thermal insulator also
make it a good noise insulator. Install it just like you would if you
were using it for an exterior wall. Try not to squeeze it in tightly
and try not to leave air gaps. You'll find it's a lot more forgiving
flowing through the supply lines. Be sure to get behind those, too.
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