If a standard wall with sheetrock on each side is STC36
what is the STC if there is only 1 layer of sheet rock on one side?
what is the STC is there is 2 layers on the same side (zero on the backside)?
what is the STC is there are 2 layers with RC on the same side (zero on the backside)?
what STC is this wall construction:
Originally posted at johnlsayers.com, topic 7435.
Have you been here:
http://www.stcratings.com/
and here
http://irc.nrc-cnrc.gc.ca/ie/acoustics/ ... ls1_e.html
Got to include insulation in the cavity to get that number, not making it a standard wall.If a standard wall with sheetrock on each side is STC36
I think it's 28, but no member of this forum even wants to know this number. This means normal speech is completely heard from other side of wall.what is the STC if there is only 1 layer of sheet rock on one side?
What ever STC # it is... it's the same number. With out the other mass the RC would be useless. I'll guess it's in the 30's, if insulation is in the equation some how.... what this means: Loud speech heard and understood from other side of wall. Packrat... it may help if you keep all your questions in the same thread Marcwhat is the STC is there is 2 layers on the same side (zero on the backside)? what is the STC is there are 2 layers with RC on the same side (zero on the backside)?
Thanks, Marc -- you beat me to the punch and did a more thorough job than I was going to do. 8)
packrat, STC doesn't mean squat for what you're doing. I know, I know -- all the purveyors of soundproofing supplies, many of which are total crap, all market the STC improvements their products supposedly make... But you need to understand STC's limitations, which are so severe that the number is meaningless in the context of your project.
And I agree -- keeping your questions in your main thread is probably best. Otherwise, you run the risk of getting answers that do not take the nuances of your project into account, and that can cause you trouble later.
--Keith :mrgreen:
Hey Packrat, been buried/under the weather for a while, missed most of your posts one way or another; please "bump" your main thread and let me know what you still need, hopefully I can do better this time... Steve
Sorry to hear that Steve. Hope you are feeling better. Been meaning to email you but I've been buried too. By an HMO with NO mercy. :twisted: They tried to take my home...#$^)_#^&*$* holes. I'll email you tonight. fitZbeen buried/under the weather for a while