Replies

1. 
   Mike_Mahan | Feb 15, 2015 11:12am | #1

   Acoustic channel

   You won't find it at Home Depot, but there are products to do this.

   http://www.soundproofingcompany.com/soundproofing101/furring-channel-with-resilient-sound-clips/

2. 
   deadnuts | Feb 15, 2015 11:39am | #2

   cant float 5/8" drywall on 2' of air

   kyrral wrote:

    Couldn't I just float the drywall by say gluing squares of lath every couple of feet along the joints.

   No. You can't just attach your drywall to the joist every couple of feet.  Granted, you will reduce the transmition of vibration through the joists with these gaps of lath. But with the additional work of applying all those additional poieces of  lath pieces needed to meet fastener spacing requirement of sheetrock , you'd be better off using the product Mike is suggesting.

   I have also applied 1-1/2" wide x 1/4" thick foam insulation tape to framing (single sided adhesive type) to improve accousitcal damping between rooms with some success. If you don't have room for acoustical channel thickness, it can only help.

1. 
   kyrral | Feb 16, 2015 12:24pm | #4

   foam tape

   Is that the stuff at Home depot for weather sealing or are there longer rolls available?

1. 
   deadnuts | Feb 16, 2015 12:51pm | #5

   I order my supply here:

   http://gasket-seal-foam-tape.cgrproducts.com/viewitems/sponge-strip-gasketing/1m-neoprene-sbr-blend-closed-cell-sponge-stripping?&bc=100|1002

3. 
   renosteinke | Feb 16, 2015 09:44am | #3

   Hat Channel

   As shown in the earlier link, 'hat channel' is where you start. It's available in various depths; the thinner 1/2"stuff is fine for this use.

   Also available is a drywall with a thin  film within, for the express purpose of reducing sound transmission. National Gypsum calls it "Soundbreak."

4. 
   AndyEngel | Feb 17, 2015 10:27am | #6

   Look into mineral wool instead of fiberglass. There's a high density version meant for sound attenuation. Resilient channel is available at drywall supply houses. It's pretty cheap. I spent about $120 for enough to do a 900 sq. ft. shop a couple of months ago. Also, minimize any holes in the ceiling plane, and fill them with acoustical sealant.