Super Soundproofing Community Forum

Soundproofing Forum Topics => Building a Sound Control room and a place for My Band to practice in! => Topic started by: bubbagump on September 24, 2008, 09:25:35 PM

Title: Drywall: which is better?
Post by: bubbagump on September 24, 2008, 09:25:35 PM
I am putting studio space in the basement and my drum room is using staggered studs. On the one side of the wall I am using Green Glue and 5/8" drywall. The other side I told the drywall guy to use 5/8" drywall, but he used 1/2". When I complained, instead of tearing out the 1/2", he suggested he just put up another layer of 1/2". I assume 2 layers of 1/2" is better than one layer of 5/8", but I am wrong a lot of times and figured I would ask. So what's the dealie-O?

Thanks!
Title: Re: Drywall: which is better?
Post by: Randy S on September 24, 2008, 10:18:14 PM
2 layers of 1/2" will be fine to replace the 1 layer of 5/8" but if you really want to increase wall STC put in some more green glue between the 2 - 1/2" layers. And dont forget to offset the seams of the draywall.
Title: Re: Drywall: which is better?
Post by: joel on November 07, 2008, 06:16:23 PM
Two layers of 1/2" dry wall, one on top of the other, "reads" just like one layer to a sound wave.  If you don't use green glue between the two 1/2" layers to damp, then you better use a layer of 5/8" added to the 1/2" existing.  Here's the general rule of thumb: 'dissimilar thicknesses of the same material, or dissimilar materials of the same thickness" - the sound wave is "broken" (interupted) when it tries to vibrate them together.