Insulation facing on interior walls?

B200Driver · Joined: 29 May 2006 Posts: 26 Location: Douglasville, GA

I asked my builder the other day if he'd mind me putting my own insulation in the stud cavities in my laundry room. He said to do as I please. We're building a new-construction home, and now is the time for such things. I figure the insulation will cut down on the noise coming from the laundry, as well as keep heat in there while the dryer is in use. So I priced out the insulation at a few places. R-11 and R-13 seem to be about the same price, so I'll probably go with the R-13 because I can. I'll be installing Faced insulation prior to the drywall crew coming, as I'll never be able to keep up with them as they're installing the board. Actually, I have decided to insulate all of the interior walls of the master suite as well, for sound deadening. My question is this. Does it matter which way the paper facing of the insulation goes on an interior wall? And can I put the insulation in cavities where there is plumbing?

sf340dvr · Joined: 05 Jul 2005 Posts: 57 Location: Appleton, WI

Its doesn't matter. The only consideration I could think of is that most insulation facing is not fire resistant, so you may have to install it with this in mind.

I attached a link to a good document from Owens Corning that deals with sound proofing using their "QuietBatt" insulation. It has some good installation tips!

Some other considerations for sound proofing:

Most sound vibrations will travel through the sheetrock to the studs to the sheetrock and room on the other side, so the best remedy is to isolate materials from one room to the next. You can do this by building a double wall that is spaced only 1/4" apart from each other, and which has the studs staggered opposite each other.
If you use the above technique then you can install batt insulation horizontally, and weave it in and out of the studs between the two walls. I remember reading somewhere that this provides the best DB reduction. It was an article that dealt with sound proofing a home theater.

http://www.owenscorning.com/quietzone/pdfs/QZBAtts_DataSheet.pdf

Hope this helps!

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