On Aug 1, 12:13*pm, windcrest wrote:
On Aug 1, 3:35*am, Aaron Fude wrote:



Hi,

I would like to insulate my kitchen ceiling for noise: my daughter's
bedroom is right above the kitchen separated from it by 3/4 pine and
nothing else.

I'm terribly allergic to fiberglass. I even stay away from insulation
isles at HD.

Are there other cheap alternatives to fiberglass if my only goal is
sound? I'm not gonna go with cellulose or something like that -- too
much work. But maybe something like cotton would work.

This ceiling will have IC rated recessed lighting cans in it.

Thanks in advance,

Aaron

Mass and isolation stop sound, not fiberglass or foam, etc. anyway.
Fiberglass or open cell foam is used to control reflection of high
frequencies off walls. *At bass frequencies fiberglass and open cell
foam is virtually invisible to sound pressure waves. *The bass is
probably what is bothering you.

Best solution is to use 5/8 inch sheet rock over resilient channel.
And recarpet the kids room with heavy rubber padding (mass) under the
carpet.

http://www.soundproofing.org/infopages/channel.htm

But the cheapest solution by far is to purchase high quality
headphones for the kid, mayby AKG701's or something like that, which
will actually reproduce the bass she seems to enjoy. *Ear buds suck at
reproducing bass.

If you're bothered by your daughter's noise, then throw her boyfriend
out =:-0

Otherwise, r-channel is the way to go. There is a dark matted sound
insulation that they use with it, but it has a weird smell for a while
so I'd keep away from it. When you install the r-channel, follow the
directions !!! Screws go from the channel to the joists. OTHER screws
go from the sheetrock to the channel. NO screws go from the sheetrock
to the joints. The ceiling floats and can actually move a little bit.

I have heard, but I do not know for sure, that if you stop the ceiling
and leave a gap to the walls (covered with moulding), it helps the
ceiling float. But I don't know and you need to follow the
directions.

You can also get sound-dampening sheetrock to go with the r-channel.

Fiberglass should be okay above the sheetrock because you're sealing
it in. You'll also going to have to lose the recessed lighting
because they will allow sound through.