Which is better in a floated RC seiling...

Dr. J · Post by **Dr. J** » Mon Sep 29, 2003 6:21 am

I am ready to start installing my live room ceiling on
resilient channel, but have the following question regarding
the materials for the layers, and which would yield better stc results.

Would it be better to use 2 layers of 5/8" sheet rock screwed to the R.C,
or would it be better to use 2 layers, the first being "sound stop",
and the other being 5/8" sheet rock?

I want to achieve a higher stc rating because this studio is "for hire"
and each group could be anything from a Gospel Quartet to full
blown Metal.

Thanks for the replies,
Dr. J

Post by **John Sayers** » Mon Sep 29, 2003 7:45 am

I would have thought they are the same - 5/8" sheetrock here (australia) is called soundstop. To increase the STC I'd put a layer of celotex or MDF between the sheetrock. Sound doesn't like changing mediums. So I'd go like this:

RC Channel
5/8" sheetrock
1/2" celotex or MDF
5/8" or 1/2" sheetrock. (dependent on budget)

cheers
john

knightfly · Post by **knightfly** » Mon Sep 29, 2003 5:59 pm

I agree with John - I'd go with the Dietrich RC deluxe if you can find it, and if you use more layers put the RC closer together to compensate.

http://www.dietrichindustries.com/bigdp ... sories.htm

Steve